Device, method and storage medium for wireless communication system

Abstract

The present invention relates to a device, method and storage medium for a wireless communication system. In an embodiment of the present disclosure, a representative terminal device is selected from a plurality of terminal devices in a terminal device group, so that the terminal device group can use the representative terminal device as a representative of the terminal device group and switch from an original cell to a target cell in a group unit.

Description

Technical Field

[0001] The present invention generally relates to a wireless communication system, and in particular to a cell handover technique in a wireless communication system. Background Art

[0002] With the development of science and technology, people's demand for travel is increasing. The increasing number of passengers and their devices on vehicles has brought a large demand for communication services, so it is very important to study wireless communication systems on vehicles, especially high-speed vehicles.

[0003] Due to the high speed of high-speed vehicles, users on high-speed vehicles face frequent inter-cell switching. In addition, there are a large number of passengers in high-speed vehicles, and often a large number of users need to complete switching in a short time. Therefore, for wireless communications on high-speed vehicles, frequent cell switching and a large number of users switching at the same time have brought technical challenges that cannot be ignored to existing wireless communication systems. Therefore, studying the technology of fast cell switching and a large number of users switching at the same time is of great significance to wireless communication systems on high-speed vehicles. Summary of the invention

[0004] In view of the above situation, the present disclosure proposes a cell switching technology based on grouping. In addition, the present disclosure also proposes a cell switching technology based on prediction.

[0005] The present disclosure provides an apparatus, a method, and a storage medium for a wireless communication system.

[0006] One aspect of the present disclosure relates to an electronic device for a control device side of a wireless communication system. According to one embodiment, the electronic device includes a processing circuit, which is configured to: select a representative terminal device from a plurality of terminal devices in a terminal device group, so that the terminal device group can use the representative terminal device as a representative of the terminal device group to switch from an original cell to a target cell served by the electronic device in units of the group.

[0007] Another aspect of the present disclosure relates to a terminal device for a terminal side of a wireless communication system. According to one embodiment, the terminal device includes a processing circuit, which is configured to: trigger an electronic device on a control side of a wireless communication system serving the terminal device to send a cell switching request for a terminal device group including the terminal device and receive a cell switching reply from the corresponding terminal device group, so that the terminal device group uses one of the terminal devices as a representative terminal device and switches from an original cell served by the electronic device to a target cell in units of the group.

[0008] Another aspect of the present disclosure relates to an electronic device for a control side of a wireless communication system. According to one embodiment, the electronic device includes a processing circuit, which is configured to: send a cell switching request of a terminal device group to another electronic device in a target cell and receive a cell switching reply of the terminal device group from the other electronic device, so that the terminal device group uses one of the terminal devices as a representative terminal device and switches from an original cell served by the electronic device to the target cell in units of the group.

[0009] Another aspect of the present disclosure relates to a group-based cell switching method used in an electronic device on a control device side of a wireless communication system. According to one embodiment, the method includes: selecting a representative terminal device from a plurality of terminal devices in a terminal device group, so that the terminal device group can use the representative terminal device as a representative of the terminal device group to switch from an original cell to a target cell served by the electronic device in units of groups.

[0010] Another aspect of the present disclosure relates to a group-based cell switching method used in a terminal device on the terminal side of a wireless communication system. According to one embodiment, the method includes: triggering an electronic device on the control side of the wireless communication system serving the terminal device to send a cell switching request for a terminal device group including the terminal device and receiving a cell switching reply from the corresponding terminal device group, so that the terminal device group uses one of the terminal devices as a representative terminal device and switches from an original cell served by the electronic device to a target cell in units of groups.

[0011] Another aspect of the present disclosure relates to a group-based cell switching method used in an electronic device on the control side of a wireless communication system. According to one embodiment, the method includes: sending a cell switching request of a terminal device group to another electronic device in a target cell and receiving a cell switching reply of the terminal device group from the other electronic device, so that the terminal device group uses one of the terminal devices as a representative terminal device and switches from an original cell served by the electronic device to a target cell in units of groups.

[0012] Another aspect of the present disclosure relates to a non-transitory computer-readable storage medium storing instructions, which, when executed by a processor, enable the processor to perform the method described in the present disclosure.

[0013] Another aspect of the present disclosure relates to a device including a processor and a non-transitory computer-readable storage medium storing instructions, which, when executed by the processor, enable the device to perform the method described in the present disclosure.

[0014] Another aspect of the present disclosure relates to an apparatus comprising means for performing the method described in the present disclosure.

[0015] Therefore, the present disclosure can simultaneously perform cell switching for users on high-speed vehicles in the form of groups, thereby increasing the switching speed, significantly reducing resource overhead, and reducing the probability of random access conflicts when a large number of users perform cell switching at the same time, thereby reducing the switching delay. Moreover, the present disclosure can also trigger cell switching in advance by predicting the quality of the target cell receiving signal, thereby effectively reducing the probability of switching failure.

[0016] The above summary is provided to summarize some exemplary embodiments to provide a basic understanding of various aspects of the subject matter described herein. Therefore, the above features are merely examples and should not be interpreted as narrowing the scope or spirit of the subject matter described herein in any way. Other features, aspects and advantages of the subject matter described herein will become clear from the specific embodiments described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] A better understanding of the present disclosure may be obtained when the following detailed description of the embodiments is considered in conjunction with the accompanying drawings. The same or similar reference numerals are used in the various drawings to represent the same or similar components. The accompanying drawings, together with the following detailed description, are included in and form a part of this specification and are used to illustrate the embodiments of the present disclosure and to explain the principles and advantages of the present disclosure. Among them:

[0018] Figure 1 is a flow chart schematically showing a conventional cell switching process;

[0019] Figure 2A is a diagram schematically showing a scenario in which a high-speed transportation vehicle according to an embodiment of the present disclosure operates;

[0020] Figure 2B is a diagram schematically showing a cell switching history according to an embodiment of the present disclosure;

[0021] Figure 3 is a block diagram schematically showing an example structure of an electronic device according to an embodiment of the present disclosure;

[0022] Figure 4 A flowchart schematically illustrates the operation of an electronic device according to an embodiment of the present disclosure;

[0023] Figure 5 is a flowchart schematically illustrating grouping terminal devices according to an embodiment of the present disclosure;

[0024] Figure 6 is a diagram schematically showing the data format of a cell handover request and a cell handover reply of a terminal device group according to an embodiment of the present disclosure;

[0025] Figure 7 is a diagram schematically illustrating a random access process of grouped users according to an embodiment of the present disclosure;

[0026] Fig. 8A is a diagram schematically showing how reference signal received power RSRP of an original cell and a target cell of a terminal device changes over time;

[0027] Figure 8B is a diagram schematically illustrating prediction-based cell switching according to an embodiment of the present disclosure;

[0028] Fig. 9 is an exemplary signaling flow chart schematically illustrating a packet-based cell switching solution according to an embodiment of the present disclosure;

[0029] Fig.10 is a schematic diagram schematically showing cell switching using a downlink transmission beam subset corresponding to a switching area according to an embodiment of the present disclosure;

[0030] Fig.11 is a block diagram schematically showing an example structure of a terminal device according to an embodiment of the present disclosure;

[0031] Fig.12 is a flowchart schematically illustrating the operation of a terminal device according to an embodiment of the present disclosure;

[0032] Fig.13 is a block diagram schematically showing an example structure of another electronic device according to an embodiment of the present disclosure;

[0033] Fig.14 is a flowchart schematically illustrating the operation of another electronic device according to an embodiment of the present disclosure;

[0034] Fig.15 is a block diagram schematically showing an example structure of a personal computer which is an information processing device that can be employed in an embodiment of the present disclosure;

[0035] Fig.16 is a block diagram showing a first example of a schematic configuration of an eNB to which the technology of the present disclosure can be applied;

[0036] Fig.17 is a block diagram showing a second example of a schematic configuration of an eNB to which the technology of the present disclosure can be applied;

[0037] Fig.18 is a block diagram showing an example of a schematic configuration of a smartphone to which the technology of the present disclosure can be applied; and

[0038] Fig.19is a block diagram showing an example of a schematic configuration of a car navigation device to which the technology of the present disclosure can be applied.

[0039] Although the embodiments described in the present disclosure may be susceptible to various modifications and alternative forms, specific embodiments thereof are shown as examples in the drawings and described in detail herein. However, it should be understood that the drawings and detailed description thereof are not intended to limit the embodiments to the particular forms disclosed, but on the contrary, the purpose is to cover all modifications, equivalents and alternatives within the spirit and scope of the claims. DETAILED DESCRIPTION

[0040] Representative applications of various aspects such as the apparatus and method of the present disclosure are described below. The description of these examples is only to increase the context and help understand the described embodiments. Therefore, it is clear to those skilled in the art that the embodiments described below can be implemented without some or all of the specific details. In other cases, well-known process steps are not described in detail to avoid unnecessarily obscuring the described embodiments. Other applications are also possible, and the solutions of the present disclosure are not limited to these examples.

[0041] Hereinafter, one or more preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In this specification and the accompanying drawings, structural elements having substantially the same function and structure are denoted by the same reference numerals, and repeated explanation of these structural elements is omitted.

[0042] Moreover, in the present specification and the accompanying drawings, in some cases, different letters attached to the same symbol can be used to distinguish elements with substantially the same function and structure. On the other hand, when each of a plurality of elements with substantially the same function and structure is not particularly distinguished, only the same symbol will be given.

[0043] Typically, a wireless communication system includes at least a control side and a terminal side, and the device on the control side can provide communication services for one or more devices on the terminal side.

[0044] In the present disclosure, the "control side" of a wireless communication system has the full breadth of its usual meaning, and generally indicates a side in a communication system that transmits a signal flow for control, such as a side that controls cell switching in a communication system. Similarly, the term "terminal side" has the full breadth of its usual meaning, and accordingly may indicate a side in a communication system that receives a signal flow to operate according to control, such as a side in a communication system that is controlled to perform cell switching. As an example, depending on the direction of the signal flow in the communication system, the "control side" and the "terminal side" may include different devices in the communication system. For example, for uplink signal transmission, the device of the "control side" may include a "base station" in the communication system, and the device of the "terminal side" may correspondingly include a "terminal device" in the communication system. Conversely, for downlink signal transmission, the device of the "control side" may include a "terminal device" in the communication system, and the device of the "terminal side" may correspondingly include a "base station" in the communication system.

[0045] In the present disclosure, the term "base station" has the full breadth of its usual meaning and includes at least a wireless communication station that is part of a wireless communication system or radio system to facilitate communication. As an example, a base station may be, for example, an eNB that complies with the 4G communication standard, a gNB that complies with the 5G communication standard, a remote radio head, a wireless access point, a drone control tower, or a communication device that performs similar functions.

[0046] In the present disclosure, "electronic equipment on the control side" has the full breadth of its usual meaning, and may include, for example, equipment that is part of a wireless communication system or a radio system to facilitate cell switching. In the present disclosure, "electronic equipment on the control side" and "base station" may be used interchangeably, or "electronic equipment on the control side" may be implemented as part of a "base station".

[0047] In the present disclosure, a "mobility management unit" is a device on the control side of a wireless communication system, and the term "mobility management unit" has the full breadth of its usual meaning, for example, it may include devices that are part of a wireless communication system or radio system to facilitate signaling processing and mobility management.

[0048] In the present disclosure, the term "terminal device" or "user equipment (UE)" has the full breadth of its usual meaning and includes at least a terminal device that is part of a wireless communication system or a radio system to facilitate communication. As an example, the terminal device may be a terminal device such as a mobile phone, a laptop, a tablet computer, a vehicle-mounted communication device, or an element thereof. In the present disclosure, "terminal device" and "user equipment" (hereinafter referred to as "user") may be used interchangeably, or the "terminal device" may be implemented as a part of the "user equipment".

[0049] It should be noted that although the embodiments of the present disclosure are described below mainly based on a communication system including a base station and a user equipment, these descriptions can be correspondingly extended to the case of a communication system including any other type of control device side and terminal device side. For example, in the case of a downlink, the operation of the control device side can correspond to the operation of the base station, and the operation of the terminal side can correspond to the operation of the terminal device.

[0050] In addition, the description will be made in the following order.

[0051] 1. Overview of cell switching

[0052] 2. Example of wireless communication system

[0053] 3. Equipment structure and operation

[0054] 3.1. Structural configuration and operation of electronic equipment in the target cell

[0055] 3.2. Terminal equipment configuration and operation

[0056] 3.3. Structural configuration and operation of electronic equipment in the original cell

[0057] 4. Application Examples

[0058] 5. Conclusion

[0059] <<1. Overview of Cell Handover>>

[0060] With the increase in people's travel needs and the advancement of technology, high-speed transportation vehicles, such as high-speed trains and subways, are increasing day by day. The increasing number of passengers and their devices on high-speed transportation vehicles has brought a large number of communication service demands, as well as many problems and challenges.

[0061] Since high-speed vehicles move at high speeds, users on them face frequent cell switching. In the prior art, users often switch cells on their own. Figure 1 An example of a traditional cell switching process is introduced.

[0062] Figure 1 FIG. 1 is a flow chart schematically showing a conventional cell switching process. Figure 1 As shown, the wireless communication system includes an electronic device 10 in a target cell, a terminal device 20 and an electronic device 30 in an original cell.

[0063] In the traditional cell switching process, in step S101, the electronic device 30 serving the user in the original cell performs measurement control (for example, reference signal received power (RSRP) measurement control) on the user's terminal device 20. Next, in step S102, the terminal device 20 performs measurement based on the control of the electronic device 30 and reports the measurement result to the electronic device 30. Next, when the measurement result meets the cell switching condition, in step S103, the electronic device 30 sends a cell switching request to the electronic device 10 in the target cell to be switched to that will serve the terminal device 20. Next, in step S104, the electronic device 10 controls whether to permit cell switching. Then, in the case of permitting cell switching, in step S105, the electronic device 10 sends a cell switching reply to the electronic device 30. Then, in step S106, the electronic device 30 sends a switching command to the terminal device 20 after receiving the cell switching reply.

[0064] Subsequently, in step S107, the terminal device 20 cuts off the connection with the electronic device 30 in the original cell, then performs downlink synchronization with the target cell, and in step S108, performs random access to the target cell using non-competitive random access resources. Specifically, in downlink synchronization, the terminal device 20 detects the synchronization signal block (SSB) to obtain the optimal downlink transmission beam. Then, according to the correspondence between the downlink transmission beam and the uplink random access resource, the terminal device 20 performs random access on the corresponding uplink random access resource, and the electronic device 10 in the target cell detects the optimal uplink receiving beam, and obtains the optimal downlink transmission beam using the correspondence between the downlink transmission beam and the uplink random access resource.

[0065] The user's cell switching usually adopts non-competitive random access, wherein the configuration information of the non-competitive random access resource is sent by the electronic device 10 of the target cell to the electronic device 30 of the original cell through the cell switching reply, and then sent to the terminal device 20 through the switching command.

[0066] Next, after the random access is successful, in step S109, the electronic device 10 sends a random access response (Random Access Response, RAR) to the terminal device 20. Finally, in step S110, the terminal device 20 that successfully detects the RAR sends a handover completion signaling to the electronic device 10 serving the terminal device 20 in the target cell, thereby completing a cell handover of the terminal device 20.

[0067] However, in the case of high-speed transportation, traditional cell switching will have great problems. As an example, assuming that the high-speed transportation vehicle is running at a moving speed of about 350km / h and the cell radius is 500m, the average residence time of the high-speed transportation vehicle in each cell is only 5s to 10s, so frequent cell switching is required. In addition, there are a large number of passengers in the high-speed transportation vehicle, so a large number of users will need to complete the switching in a short time. Still taking the moving speed of 350km / h as an example, assuming that 85 people can be accommodated every 25m on the high-speed transportation vehicle, there will be more than 300 users who need to switch cells within 1s.

[0068] Such user cell switching on high-speed vehicles will bring the following problems:

[0069] First, a large number of users switching cells at the same time will increase the switching preparation time, which may lead to switching failure. In particular, the switching preparation time may correspond to the time from sending the cell switching request in step S103 to sending the cell switching reply in step S105. In the case of a large number of users switching at the same time, the control-side electronic device must process multiple users one by one to prepare for switching, which will inevitably increase the preparation time. If the preparation time is too long, some users may even be unable to switch.

[0070] Second, a large number of users performing cell handovers at the same time will result in insufficient non-contention random access channel resources to be allocated to users when accessing the target cell, causing some users to perform contention random access, which will in turn cause random access conflicts and increase cell handover delays;

[0071] Third, the handover request and handover reply in the existing NR / LTE system are generated separately for each user performing cell handover. When a large number of users perform cell handover at the same time, the signaling overhead on the Xn / X2 interface between base stations will increase;

[0072] Fourth, the cell handover is triggered by a measurement report (e.g., an RSRP measurement report), and there is a certain time interval (i.e., the trigger time (Time-to-trigger, TTT)) between the measurement report and the measurement event performed under the measurement control. Since the high-speed vehicle moves at a high speed, the existence of the trigger time may cause the user to be unable to receive the handover command, thereby causing the cell handover to fail. In particular, after the measurement event is triggered, after the trigger time and the handover preparation time of the original cell and the target cell, the original cell sends a handover command to the user. Since the user on the high-speed vehicle moves at a high speed, the RSRP of the user's original cell may have been reduced to the extent that the user cannot correctly receive the handover command, thereby causing the handover to fail.

[0073] In view of the above considerations, the present disclosure proposes a group-based cell switching technology. In particular, in the technology of the present disclosure, the users on the high-speed transportation vehicle are simultaneously switched to the cell in groups, and a representative user is selected in each group for random access, thereby improving the switching speed, significantly reducing resource overhead, and reducing the probability of random access conflicts when a large number of users are simultaneously switching cells, thereby reducing the switching delay.

[0074] Furthermore, the present disclosure also proposes a technology for cell switching based on prediction. In particular, in the technology of the present disclosure, cell switching can be triggered in advance based on prediction, thereby effectively reducing the probability of switching failure.

[0075] The technical implementation of the present disclosure will be exemplified below for the application scenario of high-speed trains. However, it should be noted that the technical implementation of the present disclosure is not limited to this, and it can also be applied to other types of transportation vehicles that carry multiple terminal devices, where the multiple terminal devices need to be switched frequently and / or simultaneously, such as subways, fleets, and vehicle networking scenarios, etc. In the following, the electronic device 10, the terminal device 20, and the electronic device 30 can be operated according to the radio access technology in 4G LTE, and can also be operated according to the new radio access (NR) technology of 5G.

[0076] <<2. Example of wireless communication system>>

[0077] The following will refer to Figure 2A and Figure 2B A scenario in which a high-speed transportation vehicle operates and a method of identifying that a user is on the high-speed transportation vehicle according to an embodiment of the present disclosure are described.

[0078] It is worth pointing out that the solution proposed in the present disclosure is applicable to users on high-speed vehicles with fast moving speeds, fixed trajectories and a large number of users in close proximity. Figure 2A As shown in , a high-speed vehicle may travel along a specific track, and multiple cell base stations C1-C7 are arranged along the track. During the high-speed vehicle traveling along the specific track, the terminal equipment of the user carried by the high-speed vehicle will continuously switch from one base station to another.

[0079] According to the present disclosure, a variety of methods can be used to identify whether a user is a user on a high-speed vehicle. According to one embodiment, the user can be identified based on the trajectory associated with the user. As an example, when the user's moving trajectory matches the track of the high-speed vehicle, the user is determined to be a user on a high-speed vehicle (e.g., a high-speed train, a high-speed rail). According to another embodiment, the user can be identified based on the user's speed. As an example, when the user's moving speed is greater than a certain threshold, the user is determined to be a user on a high-speed vehicle in operation. According to yet another embodiment, it can be determined whether the user is a user on a high-speed vehicle based on both the user's trajectory and speed. As an example, when the user's moving trajectory matches the track of the high-speed vehicle and the user's speed is high enough, the user is determined to be a user on a high-speed vehicle.

[0080] According to an embodiment, a user's cell switching history record may be stored to identify the user on a high-speed vehicle. Generally, user mobility may be managed by a Mobility Management Entity (MME) on the network side. Specifically, Figure 2B As shown, the MME is instructed to record the user's cell switching history, including the cell ID of each cell accessed (e.g., C1-C N ), the time to access each cell (also called entry time, such as T 11 -T N1 ) and the time to disconnect from each cell (also called the departure time, such as T 12 -T N2 ). According to this embodiment, the entry time may be based on the time when the base station serving the cell receives the handover completion signaling sent by the user, and the exit time may be based on the time when the base station sends the handover command.

[0081] Taking high-speed trains as an example, for trajectory-based identification, the network side (e.g., MME) pre-stores information about cell base stations along the high-speed train track, including, for example, the ID and location of the base stations. By matching the user's cell switching history with the pre-stored cell base station information, it is determined whether the user is a high-speed rail user. For example, if the base stations involved in the user's cell switching history are all pre-stored base stations along the high-speed train track, it can be preliminarily determined that the user is moving along the high-speed train track.

[0082] Furthermore, for speed-based identification, the MME can estimate the average speed of the user's movement within a certain time period, and the calculation formula is: average speed = moving distance / moving time. Among them, the moving time is the length of the time period, for example, it can be the user's residence time in the cell as included in the cell switching history record, and the moving distance can be estimated as the distance between the base station of the cell where the user is located at the end time and the base station of the cell where the user is located at the initial time. In addition, as an example, the selection of the movement time length should allow the user to cross multiple base stations within the time period, for example, preferably 1 to 2 minutes. According to the above method, if the user's average moving speed is greater than a certain threshold, such as 150 to 200 km / h, the user can be determined to be a user on a high-speed train.

[0083] <<3. Equipment configuration and operation>>

[0084] <3.1. Structural Configuration and Operation of Electronic Equipment in Target Cell>

[0085] Figure 3 Schematically shows a block diagram of an example structure of an electronic device of a target cell according to an embodiment of the present disclosure. Figure 3 As shown, the electronic device 10 includes a processing circuit 100 , a memory 101 and a communication unit 102 .

[0086] According to this embodiment, the processing circuit can be configured to select a representative terminal device from multiple terminal devices in the terminal device group, so that the terminal device group can use the representative terminal device as a representative of the terminal device group and switch from the original cell to the target cell served by the electronic device as a group.

[0087] In the structural example of the electronic device, the processing circuit 100 can be in the form of a general-purpose processor or a dedicated processing circuit, such as an ASIC. For example, the processing circuit 100 can be constructed by a circuit (hardware) or a central processing device (such as a central processing unit (CPU)). In addition, the processing circuit 100 can carry a program (software) for making the circuit (hardware) or the central processing device work. The program can be stored in the memory 101 (such as, arranged in the memory 101) or in an external storage medium connected from the outside, and downloaded via a network (such as, the Internet).

[0088] According to this embodiment, the processing circuit 100 may include a selection unit 1001, and the selection unit 1001 may be configured to select a representative terminal device from a plurality of terminal devices in the terminal device group. According to this embodiment, the selected representative terminal device is reserved with non-contention random access resources.

[0089] According to this embodiment, terminal devices can be grouped according to signal space characteristics. According to this embodiment, each terminal device in the terminal device group has the same or similar signal space characteristics. It is easy to understand that on a high-speed vehicle, users holding each terminal device in the same terminal device group are adjacent in spatial position and maintain a spatially adjacent state within the cell switching time, and therefore have the same or similar signal space characteristics. According to this embodiment, as an example, the signal space characteristics include one or more of the following: downlink transmission beam, straight path angle, Doppler frequency shift, path loss, and cell switching history.

[0090] According to an embodiment, when a cell is switched, the terminal device group may be the same as the previous terminal device group, or may be changed. As an example, in the case where the terminal device has been grouped in the original cell, another electronic device accessed by the terminal device in the original cell obtains a new terminal device group by removing terminal devices in the original terminal device group whose signal space characteristics differ greatly from those of other terminal devices in the group, and adding new terminal devices whose signal space characteristics are similar to those of the terminal devices in the group. As another example, in the case where the terminal device has not been grouped in the original cell, another electronic device accessed by the terminal device in the original cell obtains a terminal device group by clustering the signal space characteristics.

[0091] According to this embodiment, the processing circuit 100 may further include a receiving unit 1002 , and the receiving unit 1002 may be configured to receive a cell switching request of a terminal device group from another electronic device accessed by the terminal device in the original cell.

[0092] In this embodiment, as an example, the selection unit 1001 may select a representative terminal device based on a representative terminal device ID recommended by another electronic device included in the cell switching request of the terminal device group. As another example, the selection unit 1001 may also randomly select a representative terminal device. As yet another example, the selection unit 1001 may also select a representative terminal device according to its own needs.

[0093] In this embodiment, the cell switching request of the terminal device group includes terminal device-specific information, and the terminal device-specific information may include a timing advance (TA) value of each terminal device in the terminal device group in the original cell. The TA value is the time that the user needs to advance in uplink transmission. Since different users are at different distances from the base station, in order to ensure that the uplink signals of different users can reach the base station side at the same time, different TA values ​​need to be configured for different users.

[0094] In this embodiment, the processing circuit 100 may further include a sending unit 1003, and the sending unit 1003 may be configured to send a cell handover reply of the terminal device group to another electronic device serving the original cell in response to the cell handover request of the terminal device group. Wherein, as an example, the cell handover reply of the terminal device group may include terminal device-specific information, and the terminal device-specific information may include the ID of one or more terminal devices that are allowed to switch, the ID of the selected representative terminal device, and the configuration information of the non-competitive random access resource reserved for the representative terminal device. It should be noted that the terminal device that is allowed to switch may be at least some or all of the terminal devices in the terminal device group. In addition, the cell handover reply of the terminal device group may also include the cell radio network temporary identification (C-RNTI) of each terminal device in the terminal device group in the target cell.

[0095] In this embodiment, in response to the cell switching reply of the terminal device group, another electronic device serving the original cell can send a switching command to the terminal device group. Further, in response to the switching command, all terminal devices in the terminal device group can cut off the connection with the original cell and perform downlink synchronization on the target cell.

[0096] In this embodiment, as an example, the handover command includes a random access indicator indicating whether the terminal device is a representative terminal device. In addition, for the representative terminal device, the handover command may also include configuration information of non-contention random access resources reserved by the electronic device for the representative terminal device.

[0097] In this embodiment, the representative terminal device uses the reserved non-competitive random access resources to randomly access the electronic device in the target cell. Specifically, as an example, the representative terminal device can use the reserved non-competitive random access resources to send a preamble sequence to the electronic device, thereby accessing the electronic device in the target cell. In this embodiment, the time between the representative terminal device receiving the switching command and sending the preamble sequence is greater than or equal to the predetermined group waiting window time, so as to ensure that the non-representative terminal device can successfully complete the downlink synchronization.

[0098] In this embodiment, the processing circuit 100 may further include an information acquisition unit 1004, which is configured to obtain a TA value of the representative terminal device in the target cell based on the preamble sequence, for example, the TA value may be calculated when the representative terminal device accesses the target cell. In addition, the information acquisition unit 1004 may also be configured to obtain an optimal downlink transmission beam of the representative terminal device in the target cell based on the preamble sequence.

[0099] In addition, in this embodiment, the processing circuit 100 may also include a calculation unit 1005, which is configured to calculate the change in TA value of the representative terminal device in the original cell and the target cell, and obtain the TA value of the non-representative terminal device in the target cell by adding the TA value of the non-representative terminal device in the terminal device group in the original cell to the change in the TA value of the representative terminal device.

[0100] In this embodiment, the sending unit 1003 is further configured to send a random access response RAR to all terminal devices in the terminal device group. For example, the RAR can be transmitted via a physical downlink shared channel (PDSCH) channel and may include the TA value of each terminal device mentioned above. In this embodiment, the processing circuit 100 may also include a scrambling unit 1006, which is configured to scramble the RAR to be sent to the non-representative terminal device using the C-RNTI of the non-representative terminal device. In this embodiment, the non-representative terminal device can continuously detect the RAR after completing the downlink synchronization.

[0101] In this embodiment, the receiving unit 1002 is further configured to use the uplink transmission resources indicated in the RAR to receive a switching completion signaling from the terminal device that successfully detects the RAR, thereby completing a cell switching of the terminal device group.

[0102] In addition, in this embodiment, the cell switching request of the terminal device group can be triggered by a measurement report of one or more terminal devices in the terminal device group. As an example, the measurement report can be a measurement report for RSRP. In this embodiment, when the RSRP predicted by the terminal device in the target cell exceeds the RSRP predicted in its original cell by a predetermined threshold, the cell switching request of the terminal device group can be triggered. Among them, for example, the predicted RSRP of the terminal device in the original cell and the target cell can be calculated using the currently measured RSRP, RSRP change slope and advance time. Among them, as an example, the RSRP change slope can be estimated by fitting the measured RSRP historical value. Among them, the advance time is the difference between the predicted moment and the current moment. According to this embodiment, the advance time can be configured based on the moving speed of the measured terminal device.

[0103] In addition, according to this embodiment, the leading sequence resources corresponding to a part of the downlink transmission beam of the electronic device for sending the synchronization signal block SSB can be reserved only for the terminal device representing the terminal device, so as to further reduce the resource overhead during the cell switching process.

[0104] In addition, optionally, the electronic device 10 may further include Figure 31 and the communication unit 102 are shown in dashed lines. In addition, the electronic device 10 may also include other components not shown, such as a radio frequency link, a baseband processing unit, a network interface, a processor, a controller, etc. The processing circuit 100 may be associated with the memory 101 and / or the communication unit 102. For example, the processing circuit 100 may be directly or indirectly (for example, other components may be connected in between) connected to the memory 101 to access data. For another example, the processing circuit 100 may be directly or indirectly connected to the communication unit 102 to send radio signals via the communication unit 102 and receive radio signals via the communication unit 102.

[0105] The memory 101 can store various information generated by the processing circuit 100 and various information to be used by the processing circuit 100 (for example, terminal device-specific information, terminal device group common information, etc.), programs and data for the operation of the electronic device 10, data to be sent by the communication unit 102, etc. The memory 101 is drawn with a dotted line because it can also be located inside the processing circuit 100 or outside the electronic device 10. The memory 101 can be a volatile memory and / or a non-volatile memory. For example, the memory 101 can include, but is not limited to, a random access memory (RAM), a dynamic random access memory (DRAM), a static random access memory (SRAM), a read-only memory (ROM), and a flash memory.

[0106] The communication unit 102 may be configured to communicate with other electronic devices and terminal devices under the control of the processing circuit 100. In one example, the communication unit 102 may be implemented as a transmitter or a transceiver, including communication components such as an antenna array and / or a radio frequency link. In one embodiment, the communication unit 102 may send a cell handover reply of the terminal device group determined in the processing circuit 100 to another electronic device serving the original cell. In one embodiment, the communication unit 102 may also send and receive signaling required for the process described in the embodiments of the present disclosure.

[0107] Although Figure 3 10 is shown as being separated from the communication unit 102, but the processing circuit 100 may also be implemented to include the communication unit 102. In addition, the processing circuit 100 may also be implemented to include one or more other components in the electronic device 10, or the processing circuit 100 may be implemented as the electronic device 10 itself. In actual implementation, the processing circuit 100 may be implemented as a chip (such as an integrated circuit module including a single wafer), a hardware component, or a complete product.

[0108] It should be noted that the above-mentioned units are only logical modules divided according to the specific functions implemented by them, and are not used to limit the specific implementation methods. For example, they can be implemented in software, hardware, or a combination of software and hardware. In actual implementation, the above-mentioned units can be implemented as independent physical entities, or can also be implemented by a single entity (for example, a processor (CPU or DSP, etc.), an integrated circuit, etc.). In addition, the above-mentioned units are shown with dotted lines in the drawings to indicate that these units may not actually exist, and the operations / functions implemented by them can be implemented by the processing circuit itself.

[0109] The following will refer to Figure 4-Figure 9 The grouped cell switching scheme and the prediction-based cell switching scheme implemented by the electronic device are exemplarily described.

[0110] Figure 4 The flowchart schematically shows the operation of the electronic device of the target cell according to an embodiment of the present disclosure.

[0111] First, in step S401, the electronic device receives a cell switching request of a terminal device group from another electronic device to which the terminal device accesses in an original cell.

[0112] According to this embodiment, each terminal device in the terminal device group has the same or similar signal space characteristics. Ideally, terminal devices with similar positions (for example, terminal devices located in the same car) should be divided into the same group. However, in actual communication systems, it is often difficult for base stations to accurately determine the location of terminal devices. Therefore, in some embodiments, terminal devices can be grouped using signal space characteristics. According to this embodiment, in the case where the terminal device is not grouped in the original cell, another electronic device accessed by the terminal device in the original cell can obtain a terminal device group by clustering the signal space characteristics.

[0113] Specifically, the terminal devices in the same group have the same beam, similar cell switching history, similar path loss, similar straight path angle and similar Doppler shift due to their close locations. Therefore, these features can be used to form a high-dimensional feature vector, and the high-dimensional feature vectors of multiple terminal devices can be clustered (for example, using a K-means algorithm, etc.) to obtain multiple terminal device groups.

[0114] According to the embodiment, since the TA value of the user is related to the beam, it is a necessary condition that users in the same user group have the same base station downlink transmission beam. In addition, there are usually two types of base station downlink transmission beams, a beam for sending a synchronization signal block SSB and a beam for sending a physical downlink shared channel PDSCH. Since the cell switching process mainly involves the beam corresponding to the SSB, the beam corresponding to the SSB is selected for user grouping.

[0115] As an example, Figure 5 The flowchart of the signaling for grouping terminal devices according to an embodiment of the present disclosure is schematically shown. Figure 5 As shown, in step S501, the terminal device sends an uplink reference signal to the electronic device serving it. Next, in step S502, the electronic device can estimate the signal space characteristics of the terminal device based on the received uplink reference signal, including but not limited to the downlink transmission beam, straight path angle, Doppler frequency shift, path loss, etc. Next, in step S503, the electronic device sends a signal to the MME to query the cell switching history of the terminal device. Then, after receiving the cell switching history query signaling, the MME returns the cell switching history of the terminal device previously stored to the electronic device, as shown in step S504. Finally, in step S505, the electronic device groups the terminal devices according to the cell switching history received from the MME and the estimated signal space characteristics.

[0116] In some embodiments, other information such as the in-car Wifi system and the device-to-device (D2D) system can also be used to assist in grouping terminal devices. For example, the terminal devices can be grouped based on the similar signal strength characteristics of the Wifi access points measured by the terminal devices in similar locations.

[0117] According to this embodiment, the terminal device grouping during cell switching may be the same as the previous terminal device grouping, or may be changed, for example, dynamically adjusted according to the signal space characteristics. As an example, in the case where the terminal devices have been grouped in the original cell, the terminal devices may be accessed by another electronic device in the original cell by removing the terminal devices in the original terminal device group whose signal space characteristics differ greatly from those of other terminal devices in the group, and adding new terminal devices whose signal space characteristics are similar to those of the terminal devices in the group, to obtain a new terminal device group.

[0118] It should be understood that the grouping of terminal devices is not limited to the above description, and it can be performed by the electronic device serving the terminal device in the original cell, by the electronic device to be used to serve the terminal device in the target cell, or by the MME on the network side.

[0119] According to this embodiment, the cell switching request of the terminal device group may include terminal device group common information and terminal device specific information. The terminal device group common information is the same information for the terminal devices in the same terminal device group. Figure 6 As shown, the cell switching request of the terminal device group includes the common information of the terminal device group and the information specific to the terminal devices 1 to K. All the terminal devices in the terminal device group can reduce the Xn / X2 interface signaling overhead by multiplexing the common information of the terminal device group.

[0120] According to this embodiment, the terminal device-specific information in the cell switching request of the terminal device group may include the TA value of each terminal device in the terminal device group in the original cell. In some embodiments, the terminal device group common information in the cell switching request of the terminal device group may include the target cell ID and the original cell minimum system information, etc.

[0121] Return to reference Figure 4 Next, in step S402, the electronic device determines whether to allow the terminal device group to perform cell switching. In the case of allowing the cell switching request (step S402 is "yes"), in step S403, the electronic device selects a representative terminal device from multiple terminal devices in the terminal device group, and then, in step S404, sends a cell switching reply of the terminal device group to another electronic device in the original cell.

[0122] According to this embodiment, the cell handover reply of the terminal device group may include terminal device group common information and terminal device specific information. The terminal device group common information is the same information for the terminal devices in the same terminal device group. Figure 6 As shown, the cell handover reply of the terminal device group includes the common information of the terminal device group and the information specific to the terminal devices 1 to K. All the terminal devices in the terminal device group can reduce the Xn / X2 interface signaling overhead by multiplexing the common information of the terminal device group.

[0123] According to this embodiment, the terminal device-specific information in the cell handover reply of the terminal device group may include the ID of one or more terminal devices for which the handover is permitted, the ID of the selected representative terminal device, and the configuration information of the non-competitive random access resource reserved for the representative terminal device. In some embodiments, the terminal device group-common information in the cell handover reply of the terminal device group may include the target cell ID, the target cell security algorithm identifier, and the target cell system information block, etc.

[0124] According to this embodiment, the representative terminal device can be selected by the target cell in various ways. In some embodiments, the electronic device can also randomly select the representative terminal device or select the representative terminal device according to its own needs. As an example, it can be randomly selected from the terminal device group, or it can be selected according to certain terminal device characteristics (such as RSRP, etc.).

[0125] In some embodiments, in order to support subsequent group random access, the cell switching request of the terminal device group may also include a representative terminal device ID recommended by another electronic device serving the original cell. According to this embodiment, the electronic device may select a representative terminal device based on the representative terminal device ID recommended by another electronic device in the original cell. As an example, under normal circumstances, the electronic device in the target cell does not know the characteristics of the terminal device. Thus, another electronic device providing services in the original cell can recommend a suitable representative terminal device based on the characteristics of the terminal device, for example, it can recommend a terminal device with the best channel quality (for example, the largest RSRP) as the representative terminal device, and include the ID of the representative terminal device in the cell switching request of the terminal device group and send it to the electronic device providing services in the target cell.

[0126] In order to support subsequent group random access, according to this embodiment, the cell handover reply of the terminal device group may also include the C-RNTI of each terminal device in the terminal device group in the target cell.

[0127] According to this embodiment, in response to the cell handover reply of the terminal device group, another electronic device in the original cell sends a handover command to the terminal device group. According to this embodiment, the handover command may include a random access indicator indicating whether the terminal device is a representative terminal device. As an example, for a representative terminal device, the random access indicator may be 1, and for a non-representative terminal device, the random access indicator may be 0. According to this embodiment, for a representative terminal device, the handover command may also include configuration information of a non-competitive random access resource reserved by an electronic device in the target cell for the representative terminal device, thereby informing the representative terminal device of the non-competitive random access resource reserved for it.

[0128] Return to reference Figure 4 , Next, in step S405, the electronic device receives random access from the terminal device group. Specifically, the representative terminal device cuts off the connection with the original cell and synchronizes downlink with the electronic device in the target cell. Then, the representative terminal device uses the non-competitive random access resources reserved for it to randomly access the electronic device in the target cell. As an example, the representative terminal device uses the reserved non-competitive random access resources to send a preamble sequence to the electronic device, and the electronic device in the target cell detects the optimal uplink receive beam based on the preamble sequence, and obtains the optimal downlink transmit beam using the correspondence between the downlink transmit beam and the uplink random access resource.

[0129] It is easy to understand that since the downlink transmission beams of each terminal device in the same user terminal device group are the same, the optimal downlink transmission beam of the representative terminal device is also the optimal downlink transmission beam of other non-representative terminal devices in the group. Therefore, the non-representative terminal device also cuts off the connection with the original cell and synchronizes downlink with the electronic equipment in the target cell. Then, the optimal downlink transmission beam can be used to randomly access the electronic equipment in the target cell.

[0130] According to this embodiment, the time between the terminal device receiving the switching command and sending the preamble sequence is greater than or equal to the predetermined group waiting window time, such as Figure 7 As shown, it can be ensured that the non-representative terminal device can complete downlink synchronization within the group waiting window time, avoiding access failure of the non-representative terminal device, thereby improving the robustness of the communication system.

[0131] Next, in step S406, the electronic device sends a random access response RAR to the terminal device. In some embodiments, the electronic device sends a random access response RAR to all terminal devices in the terminal device group. In this embodiment, the RAR may include a TA value, a C-RNTI, and an uplink transmission resource. In some embodiments, the electronic device may send the RAR in a common physical downlink control channel (PDCCH) space.

[0132] According to an embodiment, the TA value included in the RAR may include the TA value of the non-representative terminal device, and the TA value may be calculated as follows. According to this embodiment, the electronic device may also obtain the TA value of the representative terminal device in the target cell based on the preamble sequence. Since the cell switching time is short (usually within tens of ms to hundreds of ms), it can be assumed that the user terminal clock is stable during the cell switching process, so for all terminal devices in the same terminal device group, the change of TA during the cell switching process (i.e., the difference between the TA value in the target cell and the TA value in the original cell) is basically the same. According to this embodiment, the electronic device may calculate the change in the TA value of the representative terminal device in the original cell and the target cell, and obtain the TA value of the non-representative terminal device in the target cell by adding the TA value of the non-representative terminal device in the terminal device group in the original cell to the change in the TA value of the representative terminal device. The calculation formula of the new TA value of the non-representative terminal device in the target cell may be: non-representative terminal device target cell TA = non-representative terminal device original cell TA + representative terminal device TA change.

[0133] In order to enable the non-representative terminal device to receive and correctly decode the RAR sent by the electronic device in the target cell, in this embodiment, the electronic device uses the C-RNTI of the non-representative terminal device to scramble the RAR to be sent to the non-representative terminal device. Since the C-RNTI of the terminal device in the target cell has been included in the cell handover reply and sent to the terminal device through the handover command, the terminal device has obtained the C-RNTI in the new cell before accessing the target cell, and can decode the received RAR through the C-RNTI.

[0134] In addition, since the TA value of the non-representative terminal device can be calculated only after the representative terminal device completes random access, the RAR of the non-representative terminal device needs to be transmitted after the representative terminal device completes random access. Therefore, the non-representative terminal device does not know when the RAR will be transmitted. Therefore, in this embodiment, the non-representative terminal device needs to continuously detect the RAR after completing the downlink synchronization, such as Figure 6 In some embodiments, the non-representative terminal device may continuously detect the RAR in the common PDCCH space.

[0135] Although receiving a random access and sending a random access response are described here in two steps S405 and S406, in some embodiments, steps S405 and S406 may also be referred to as a random access procedure as a whole.

[0136] Finally, in step S407, the electronic device may utilize the uplink transmission resources indicated in the RAR to receive a switching completion signaling from the terminal device that successfully detects the RAR, thereby completing the cell switching.

[0137] In addition, according to this embodiment, the cell switching request of the terminal device group may be triggered by a measurement report of one or more terminal devices in the terminal device group, for example, may be triggered by an RSRP measurement report.

[0138] A variety of measurement events are defined in the existing NR / LTE system. When the measurement event conditions are met, the measurement report will be triggered, and the electronic equipment in the original cell will decide whether to switch the cell based on the measurement report. As an example, the measurement event A3 defined in the NR / LTE system refers to the RSRP of the neighboring cell being higher than the RSRP of the current cell by more than a specific threshold (for example, 3dB or 6dB).

[0139] However, it should be noted that measurement reporting is usually performed after a period of time (e.g., 200ms) after the measurement event is triggered. In addition, the radio protocol stack usually has three layers: Layer 1, Layer 2, and Layer 3. Among them, Layer 1 (L1) is the lowest layer and implements various physical layer signal processing to provide transparent transmission of signals; Layer 2 (L2 layer) is above the physical layer and is responsible for the link between the terminal device and the electronic device above the physical layer; Layer 3 (L3 layer) is responsible for obtaining radio resources (i.e., radio bearers) and for configuring each lower layer using RRC signaling between the electronic device and the terminal device. Users usually use L3 RSRP to trigger measurement events. L3 RSRP is obtained by filtering L1 RSRP. Although it is more accurate, there is a certain delay.

[0140] Fig. 8A The figure schematically shows the change of RSRP of the original cell and the target cell of the terminal device over time. During the movement of the high-speed train, the terminal device on the train is getting farther and farther away from the original cell and closer and closer to the target cell. Fig. 8A As shown, the L3 RSRP of the original cell (as indicated by the dotted line) decreases continuously over time, while the L3 RSRP of the target cell (as indicated by the solid line) increases continuously over time.

[0141] In the traditional solution, when the target cell L3 RSRP of the terminal device exceeds the original cell L3 RSRP threshold τ, a measurement event can be triggered. After the trigger time TTT and the handover preparation time of the original cell and the target cell, the original cell sends a handover command to the terminal device. Since the terminal devices on the high-speed train move at a high speed, the original cell L3 RSRP of the terminal device may have been reduced to the extent that the handover command cannot be correctly received, resulting in a cell handover failure.

[0142] To solve this problem, the present disclosure proposes a prediction-based cell switching solution. In this embodiment, when the RSRP predicted by the terminal device in the target cell exceeds the RSRP predicted in its original cell by a predetermined threshold, a cell switching request of the terminal device group may be triggered.

[0143] like Figure 8B As shown, the predicted L3 RSRP of the terminal device in the original cell and the target cell can be calculated using the currently measured RSRP, RSRP change slope and advance time. Specifically, the prediction formula of L3 RSRP is as follows:

[0144] Predicted L3 RSRP = current L3 RSRP + L3 RSRP change slope × advance time

[0145] Among them, the slope of the L3 RSRP change can be estimated by fitting the measured RSRP historical values. For example, it can be estimated by fitting the L3 RSRP values ​​in the most recent period of time using the least squares method and other algorithms. The advance time is the time difference between the predicted moment and the current moment, which can be configured in advance based on the moving speed of the measured terminal device. For example, the faster the moving speed, the more advance time can be configured. For terminal devices on high-speed vehicles, since the moving trajectory is fixed, the optimal advance time can be obtained through long-term learning, and the terminal device in the original cell can select the advance time that makes the switching success rate the highest. In addition, the prediction of RSRP in the original cell and the target cell is performed independently.

[0146] As described above, a prediction-based measurement event can be defined, for example, the predicted L3 RSRP of the target cell exceeds the predicted L3 RSRP of the original cell by a certain threshold τ. Using this prediction-based measurement event, inter-cell handover can be triggered in advance to ensure that when the original cell sends a handover command to the terminal device, the original cell RSRP of the terminal device is still large enough, thereby reducing the probability of handover failure.

[0147] Although only L3 RSRP is described above, it should be understood that the above prediction-based cell switching solution is also applicable to the case where L1 RSRP or other parameters are used. In addition, please note that the prediction-based principle is also applicable to improving other measurement events defined in the NR / LTE system.

[0148] Fig. 9 is an exemplary signaling flow chart schematically illustrating a packet-based cell switching solution according to an embodiment of the present disclosure.

[0149] like Fig. 9 As shown, in step S901, the electronic device 30 serving the user in the original cell performs measurement control on the user's terminal device 20. Then, in step S902, the terminal device 20 performs measurement based on the control of the electronic device 30, and reports the measurement result to the electronic device 30. The measurement may include measurement of RSRP for the terminal device 20, and may also include measurement of other parameters.

[0150] Next, in step S903, the electronic device 30 determines whether to perform cell switching of the terminal device group based on the defined predicted cell switching condition. For example, when the measurement report of one or more terminal devices in the terminal device group meets the cell switching condition, it can be determined to perform cell switching of the terminal device group.

[0151] When the electronic device 30 makes a decision to perform a cell handover of the terminal device group, in step S904, the electronic device 30 sends a cell handover request of the terminal device group to the electronic device 10 in the target cell to be handed over that will serve the terminal device 20, so as to initialize the cell handover of the terminal device group. The cell handover request of the terminal device group may include common information of the terminal device group and terminal device-specific information, and the terminal device-specific information may include the TA value of each terminal device in the original cell.

[0152] Next, in step S905, the electronic device 10 of the target cell performs permission control to permit or reject the cell handover request of the terminal device group. In the case of permitting the cell handover request of the terminal device group, the electronic device 10 selects a terminal device from the terminal device group as a representative terminal device and reserves non-competitive random access resources for it.

[0153] Next, in step S906, the electronic device 10 in the target cell sends a cell handover reply of the terminal device group to the electronic device 30 in the original cell. The cell handover reply of the terminal device group may include common information of the terminal device group and terminal device-specific information, and the terminal device-specific information may include the ID of one or more terminal devices for which cell handover is permitted, the ID of the selected representative terminal device, and the configuration information of the non-competitive random access resource reserved for the representative terminal device.

[0154] Next, in step S907, the electronic device 30 of the original cell generates a handover command for each terminal device, and in step S908, sends a handover command to the terminal device that permits the cell handover. The handover command may include a random access indicator, for example, for a representative terminal device, the random access indicator is 1, and for a non-representative terminal device, the random access indicator is 0. In addition, for a representative terminal device, the handover command may also include configuration information of a non-competitive random access resource reserved for it by the target cell.

[0155] Next, in step S909, the terminal device that receives the handover command disconnects from the original cell and performs downlink synchronization on the target cell. Subsequently, in step S910, the representative terminal device uses the reserved non-competitive random access resources to perform random access to the target cell. The electronic device 10 in the target cell obtains the optimal downlink transmission beam and TA value of the representative terminal device, and further calculates the TA value of the non-representative terminal device in the terminal device group.

[0156] Next, in step S911, the electronic device 10 of the target cell sends RAR to all terminal devices in the terminal device group. For the representative terminal device, the RAR can be sent using the method in the existing standard, and for the non-representative terminal device, the RAR can be scrambled and sent using C-RNTI. The non-representative terminal device continuously detects the RAR after downlink synchronization.

[0157] Finally, in step S912, the terminal device that successfully detects the RAR uses the uplink transmission resources indicated in the RAR to send a switching completion signaling to the electronic device 10 in the target cell, thereby completing the cell switching.

[0158] It should be understood that only the main signaling process in the specific example of the grouped cell switching according to the embodiment of the present disclosure is shown here, and the grouped cell switching according to the present disclosure naturally also includes other auxiliary signaling required to complete the cell switching. According to the principle and signaling process of the cell switching as described above, the grouped cell switching according to the embodiment of the present disclosure is completed.

[0159] The above referenced Figure 4-Figure 9 The group-based cell switching and prediction-based cell switching technologies according to the exemplary embodiments of the present disclosure are described. According to the group-based cell switching as described above, cell switching can be performed simultaneously for users on high-speed transportation vehicles in groups, which speeds up the switching speed. Only one representative user is selected in each group for random access, thereby significantly reducing resource overhead and reducing the probability of random access conflicts when a large number of users perform cell switching at the same time, thereby reducing the switching delay. In addition, according to the prediction-based cell switching as described above, cell switching can also be triggered in advance based on the prediction, thereby effectively reducing the probability of switching failure. Please note that the above-mentioned group-based cell switching and prediction-based cell switching technologies can be used separately or in combination.

[0160] In addition, during the wireless communication process, the initial access process of the user's terminal device requires the base station (that is, the electronic device) to obtain the optimal downlink transmission beam for each user, which is determined by a fixed mapping relationship between the downlink synchronization signal block SSB and the uplink preamble sequence, where each SSB corresponds to a downlink transmission beam. Specifically, the base station periodically sends the downlink synchronization signal block SSB, the user detects the SSB with the largest RSRP, and determines the preamble sequence used in the uplink random access process through the correspondence between the downlink SSB and the uplink preamble sequence. Subsequently, the user sends the preamble sequence for random access, and the base station can obtain the SSB with the largest RSRP by detecting the preamble sequence used by the user, thereby determining the optimal downlink transmission beam.

[0161] In a non-competitive random access scenario, the preamble sequence resources are reserved for users. It can be seen that the more SSBs there are, the more preamble sequence resources need to be reserved, resulting in a large resource overhead. In order to further reduce the resource overhead during cell switching, the present invention proposes that only preamble sequences corresponding to some SSBs can be reserved. In this embodiment, preamble sequence resources corresponding to a portion of the downlink transmission beams of the base station for sending downlink SSBs can be reserved only for the representative terminal device.

[0162] This is because, for users on high-speed trains, since their moving trajectories are fixed, inter-cell handover usually occurs within a relatively fixed area, such as Fig.10 The handover area shown in FIG. The base station downlink transmission beam corresponding to the handover area is a subset of all possible downlink transmission beams, such as Fig.10 As shown by the downlink transmission beam marked in black in the figure. This downlink transmission beam subset is commonly used in the cell switching process, so the base station can only configure the leading sequence resources corresponding to this downlink transmission beam subset. In some embodiments, the base station downlink transmission beam subset corresponding to the switching area can be obtained by long-term learning of the optimal downlink transmission beam when the user on the high-speed train accesses the cell.

[0163] In addition, although the above description only separately describes the electronic device 10 of the target cell and the electronic device 30 of the original cell, it should be understood that the electronic device 10 of the target cell and the electronic device 30 of the original cell can also be used interchangeably, and the functions described for the two can be integrated in the same electronic device.

[0164] <3.2. Terminal equipment configuration and operation>

[0165] The terminal device of the present disclosure will be described below with reference to the accompanying drawings. It should be noted that some terms described herein may have similar meanings as described above. Fig.11 Schematically shows a block diagram of an example structure of a terminal device according to an embodiment of the present disclosure. Fig.11 As shown, the terminal device 20 includes a processing circuit 200 , a memory 201 and a communication unit 202 .

[0166] According to this embodiment, the processing circuit 200 may be configured to trigger an electronic device on the control side of a wireless communication system serving a terminal device to send a cell switching request for a terminal device group including the terminal device and receive a cell switching reply for the corresponding terminal device group, so that the terminal device group uses one of the terminal devices as a representative terminal device and switches from the original cell served by the electronic device to the target cell in groups. Further, the processing circuit 200 may be configured to trigger the electronic device to send a cell switching request for the terminal device group when the terminal device moves along a specific trajectory and the moving speed is greater than a specific threshold, and the measurement report meets the cell switching condition.

[0167] In the structural example of the terminal device 20, the processing circuit 200 can be in the form of a general-purpose processor or a dedicated processing circuit, such as an ASIC. For example, the processing circuit 200 can be constructed by a circuit (hardware) or a central processing device (such as a central processing unit (CPU)). In addition, the processing circuit 200 can carry a program (software) for making the circuit (hardware) or the central processing device work. The program can be stored in the memory 201 (such as, arranged in the memory) or in an external storage medium connected from the outside, and downloaded via a network (such as, the Internet).

[0168] According to this embodiment, the processing circuit 200 may include a receiving unit 2001, which may be configured to receive a measurement control command from an electronic device of an original cell. In addition, according to this embodiment, the receiving unit 2001 may also be configured to receive a handover command from an electronic device of the original cell. In addition, according to this embodiment, the receiving unit 2001 may also be configured to receive a random access response RAR from an electronic device of a target cell.

[0169] According to this embodiment, the processing circuit 200 may further include a measuring unit 2002, which may be configured to measure the terminal device in response to the measurement control command, for example, may measure the L1 RSRP or the L3 RSRP.

[0170] According to this embodiment, the processing circuit 200 may further include a sending unit 2003, which is configured to send a measurement report to the electronic device of the original cell to report the measurement result thereto. In addition, according to this embodiment, the sending unit 2003 may also be configured to, when the terminal device is a representative terminal device, use the reserved non-competitive random access resources to send a preamble sequence to the electronic device of the target cell, thereby accessing the electronic device in the target cell. In addition, in some embodiments, the sending unit 2003 may also be configured to, when the terminal device successfully detects the RAR, use the uplink transmission resources indicated in the RAR to send a switching completion signaling to the electronic device to be accessed by the terminal device in the target cell.

[0171] In some embodiments, terminal devices may be grouped by electronic devices based on their signal space characteristics and cell switching history. In some embodiments, the signal space characteristics may be estimated by the electronic device based on the uplink reference signal sent by the terminal device, and the cell switching history may be obtained by the electronic device from a query of the mobility management unit. Further, in some embodiments, terminal devices having the same or similar signal space characteristics may be grouped together. In some embodiments, the terminal device group may include a representative terminal device and one or more non-representative terminal devices.

[0172] In addition, the processing circuit 200 may further include a synchronization unit 2004, which may be configured to cut off the connection with the original cell in response to the handover command, and perform downlink synchronization on the target cell.

[0173] In addition, according to this embodiment, the processing circuit 200 may include a detection unit 2005, which may be configured to detect a random access response RAR. According to this embodiment, when the terminal device is a non-representative terminal device, after completing downlink synchronization, the detection unit 2005 continuously detects the random access response RAR.

[0174] In addition, optionally, the terminal device 20 may also include a memory 201 and a communication unit 202 shown in dotted lines in the figure. In addition, the terminal device 20 may also include other components not shown, such as a radio frequency link, a baseband processing unit, a network interface, a processor, a controller, etc. The processing circuit 200 may be associated with the memory 201 and / or the communication unit 202. For example, the processing circuit 200 may be directly or indirectly (for example, other components may be connected in the middle) connected to the memory 201 to access data. For example, the processing circuit 200 may be directly or indirectly connected to the communication unit 202 to send radio signals via the communication unit 202 and receive radio signals via the communication unit 202.

[0175] The memory 201 may store various information generated by the processing circuit 200 (e.g., measurement results, handover completion signaling, etc.), programs and data for the operation of the terminal device 20, data to be sent by the communication unit 202, etc. The memory 201 is drawn with a dotted line because it may also be located within the processing circuit 200 or outside the terminal device 20. The memory 201 may be a volatile memory and / or a non-volatile memory. For example, the memory 201 may include, but is not limited to, a random access memory (RAM), a dynamic random access memory (DRAM), a static random access memory (SRAM), a read-only memory (ROM), and a flash memory.

[0176] The communication unit 202 may be configured to communicate with the electronic device under the control of the processing circuit 200. In one example, the communication unit 202 may be implemented as a transmitter or a transceiver, including communication components such as an antenna array and / or a radio frequency link. In one embodiment, the communication unit 202 may send the measurement result of at least one terminal device obtained by the processing circuit 200 to the electronic device. In one embodiment, the communication unit 202 may also send and receive signaling required for the process described in the embodiments of the present disclosure.

[0177] Although Fig.11 200 is shown to be separated from the communication unit 202, but the processing circuit 200 may also be implemented to include the communication unit 202. In addition, the processing circuit 200 may also be implemented to include one or more other components in the terminal device 20, or the processing circuit 200 may be implemented as the terminal device 20 itself. In actual implementation, the processing circuit 200 may be implemented as a chip (such as an integrated circuit module including a single wafer), a hardware component, or a complete product.

[0178] It should be noted that the above-mentioned units are only logical modules divided according to the specific functions implemented by them, and are not used to limit the specific implementation methods. For example, they can be implemented in software, hardware, or a combination of software and hardware. In actual implementation, the above-mentioned units can be implemented as independent physical entities, or can also be implemented by a single entity (for example, a processor (CPU or DSP, etc.), an integrated circuit, etc.). In addition, the above-mentioned units are shown with dotted lines in the drawings to indicate that these units may not actually exist, and the operations / functions implemented by them can be implemented by the processing circuit itself.

[0179] Fig.12 is a flowchart schematically illustrating the operation of a terminal device according to an embodiment of the present disclosure.

[0180] like Fig.12 As shown, in step S1201, the terminal device receives a measurement control command from an electronic device of an original cell. Next, in step S1202, the terminal device performs measurement in response to the measurement control command and sends a measurement report to the electronic device.

[0181] In some embodiments, when a terminal device moves along a specific trajectory and the moving speed is greater than a specific threshold, and the measurement report satisfies the cell switching condition, the electronic device is triggered to send a cell switching request for the terminal device group and receive a cell switching reply for the corresponding terminal device group, so that the terminal device group uses one of the terminal devices as a representative terminal device and switches from the original cell served by the electronic device to the target cell as a group.

[0182] In some embodiments, the terminal devices are grouped by the electronic device according to their signal space characteristics and cell switching history. In some embodiments, the signal space characteristics are estimated by the electronic device based on the uplink reference signal sent by the terminal device. In some embodiments, the cell switching history is obtained by the electronic device from a mobile management unit query. In some embodiments, terminal devices with the same or similar signal space characteristics are grouped. In some embodiments, the terminal device group includes a representative terminal device and one or more non-representative terminal devices.

[0183] Next, in step S1203, the terminal device receives a handover command from the electronic device. Then, in step S1204, in response to the handover command, the terminal device cuts off the connection with the original cell and performs downlink synchronization on the target cell.

[0184] Next, in step S1205, the terminal device group randomly accesses the target cell. In some embodiments, when the terminal device is a representative terminal device, it uses the reserved non-competitive random access resources to randomly access the electronic device in the target cell, and receives a random access response RAR from the electronic device in the target cell. In some embodiments, when the terminal device is a representative terminal device, it uses the reserved non-competitive random access resources to send a preamble sequence to the electronic device in the target cell, thereby accessing the electronic device in the target cell, and the non-representative terminal device can also access the electronic device in the target cell using the optimal downlink transmission beam determined based on the preamble sequence. In some embodiments, when the terminal device is a non-representative terminal device, it continuously detects the random access response RAR after completing the downlink synchronization.

[0185] Finally, in step S1206, when the terminal device successfully detects the RAR, it uses the uplink transmission resources indicated in the RAR to send a switching completion signaling to the electronic device that the terminal device wants to access in the target cell.

[0186] <3.3. Structural configuration and operation of electronic equipment in the original cell>

[0187] The electronic device of the primary cell of the present disclosure will be described below with reference to the accompanying drawings. It should be noted that some of the terms described herein may have similar meanings as described above. Fig.13 Schematically shows a block diagram of another example structure of an electronic device according to an embodiment of the present disclosure. Fig.13 As shown, the electronic device 30 includes a processing circuit 300 , a memory 301 and a communication unit 302 .

[0188] According to this embodiment, the processing circuit 300 can be configured to send a cell switching request for the terminal device group to the electronic device in the target cell and receive a cell switching response for the terminal device group from the electronic device in the target cell, so that the terminal device group uses one of the terminal devices as a representative terminal device and switches from the original cell to the target cell as a group.

[0189] In the structural example of the above-mentioned electronic device 30, the processing circuit 300 can be in the form of a general-purpose processor, or it can be a dedicated processing circuit, such as an ASIC. For example, the processing circuit 300 can be constructed by a circuit (hardware) or a central processing device (such as a central processing unit (CPU)). In addition, the processing circuit 300 can carry a program (software) for making the circuit (hardware) or the central processing device work. The program can be stored in the memory 301 (such as, arranged in the memory) or in an external storage medium connected from the outside, and downloaded via a network (such as, the Internet).

[0190] According to this embodiment, the processing circuit 300 may include a sending unit 3001, which may be configured to send a cell handover request of a terminal device group to an electronic device in a target cell. According to this embodiment, the sending unit 3001 may also be configured to send a cell handover request of a terminal device group to an electronic device serving the target cell when a measurement report of the terminal device meets a cell handover condition. In some embodiments, the cell handover request of the terminal device group may include a representative terminal device ID recommended by the electronic device 30 to the electronic device of the target cell. According to this embodiment, the sending unit 3001 may also be configured to send a cell handover history query command to the mobility management unit.

[0191] According to this embodiment, the processing circuit 300 may further include a receiving unit 3002, which may be configured to receive a cell handover reply of a terminal device group from an electronic device of a target cell. In some embodiments, the receiving unit 3002 may further be configured to receive a measurement report from one or more terminal devices in the terminal device group. In some embodiments, the receiving unit 3002 may further be configured to receive a cell handover history of a terminal device from a mobility management unit. In some embodiments, the receiving unit 3002 may further be configured to receive an uplink reference signal from a terminal device.

[0192] According to this embodiment, the processing circuit 300 may further include a grouping unit 3003, which may be configured to group the terminal devices served by the electronic device 30 into one or more terminal device groups, wherein each terminal device group includes a representative terminal device and one or more non-representative terminal devices. In some embodiments, the grouping unit 3003 may further be configured to group the terminal devices according to the signal space characteristics and cell switching history of the terminal devices. In some embodiments, the grouping unit 3003 may further be configured to group the terminal devices with the same or similar signal space characteristics by clustering the signal space characteristics when the terminal devices have not been grouped before; and when the terminal devices have been grouped before, a new terminal device group is obtained by removing the terminal devices in the original terminal device group whose signal space characteristics differ greatly from those of other terminal devices in the group, and adding new terminal devices whose signal space characteristics are similar to those of the terminal devices in the group.

[0193] According to this embodiment, the processing circuit 300 may further include an estimating unit 3004 , which may be configured to estimate a signal spatial characteristic of the terminal device based on the uplink reference signal received by the receiving unit 3002 .

[0194] According to this embodiment, the processing circuit 300 may further include a selection unit 3005 , which may be configured to select a representative terminal device according to the characteristics of the terminal device.

[0195] According to this embodiment, the sending unit 3001 may also be configured to send a handover command to the terminal device group in response to the cell handover reply of the terminal device group. In some embodiments, the handover command includes a cell radio network temporary identifier C-RNTI of each terminal device in the terminal device group in the target cell. In some embodiments, the sending unit 3001 may also be configured to send a cell handover request of the terminal device group to the electronic device serving the target cell when the reference signal received power RSRP predicted by the terminal device in the target cell exceeds the RSRP predicted in the original cell by a predetermined threshold.

[0196] According to this embodiment, the processing circuit 300 may also calculate a unit 3006, which may be configured to calculate the predicted RSRP of the terminal device in the original cell and the target cell using the currently measured RSRP, the RSRP change slope and the advance time. In some embodiments, the estimation unit 3004 may also be configured to fit the estimated RSRP change slope using the measured RSRP historical value. In some embodiments, the advance time may be configured based on the moving speed of the measured terminal device.

[0197] In addition, optionally, the electronic device 30 may further include a memory 301 and a communication unit 302 shown in dotted lines in the figure. In addition, the electronic device 30 may also include other components not shown, such as a radio frequency link, a baseband processing unit, a network interface, a processor, a controller, etc. The processing circuit 300 may be associated with the memory 301 and / or the communication unit 302. For example, the processing circuit 300 may be directly or indirectly (for example, other components may be connected in the middle) connected to the memory 301 to access data. For another example, the processing circuit 300 may be directly or indirectly connected to the communication unit 302 to send radio signals via the communication unit 302 and receive radio signals via the communication unit 302.

[0198] The memory 301 can store various information generated by the processing circuit 300 (for example, grouping information of terminal devices, signal space characteristics, selected representative terminal device IDs, etc.), programs and data for the operation of the electronic device 30, data to be sent by the communication unit 302, etc. The memory 301 is drawn with a dotted line because it can also be located inside the processing circuit 300 or outside the electronic device 30. The memory 301 can be a volatile memory and / or a non-volatile memory. For example, the memory 301 can include, but is not limited to, a random access memory (RAM), a dynamic random access memory (DRAM), a static random access memory (SRAM), a read-only memory (ROM), and a flash memory.

[0199] The communication unit 302 may be configured to communicate with the electronic device and the terminal device under the control of the processing circuit 300. In one example, the communication unit 302 may be implemented as a transmitter or a transceiver, including communication components such as an antenna array and / or a radio frequency link. In one embodiment, the communication unit 302 may send the representative terminal device ID determined in the processing circuit 300 to the electronic device of the original cell in the wireless communication system. In one embodiment, the communication unit 302 may also send and receive the signaling required for the process described in the embodiments of the present disclosure.

[0200] Although Fig.13 300 is shown to be separated from the communication unit 302, but the processing circuit 300 may also be implemented to include the communication unit 302. In addition, the processing circuit 300 may also be implemented to include one or more other components in the electronic device 30, or the processing circuit 300 may be implemented as the electronic device 30 itself. In actual implementation, the processing circuit 300 may be implemented as a chip (such as an integrated circuit module including a single wafer), a hardware component, or a complete product.

[0201] It should be noted that the above-mentioned units are only logical modules divided according to the specific functions implemented by them, and are not used to limit the specific implementation methods. For example, they can be implemented in software, hardware, or a combination of software and hardware. In actual implementation, the above-mentioned units can be implemented as independent physical entities, or can also be implemented by a single entity (for example, a processor (CPU or DSP, etc.), an integrated circuit, etc.). In addition, the above-mentioned units are shown with dotted lines in the drawings to indicate that these units may not actually exist, and the operations / functions implemented by them can be implemented by the processing circuit itself.

[0202] Fig.14 is a flowchart schematically illustrating the operation of an electronic device of an original cell according to an embodiment of the present disclosure.

[0203] like Fig.14 As shown, in step S1401, the electronic device groups the terminal devices. Specifically, the electronic device groups the terminal devices it serves into one or more terminal device groups, wherein each terminal device group includes a representative terminal device and one or more non-representative terminal devices.

[0204] In some embodiments, the electronic device may group the terminal devices according to the signal spatial characteristics and cell switching history of the terminal devices. In some embodiments, the electronic device sends a cell switching history query command to the mobility management unit, and then receives the cell switching history of the terminal device from the mobility management unit. In some embodiments, the electronic device receives an uplink reference signal from the terminal device, and then estimates the signal spatial characteristics of the terminal device based on the received uplink reference signal.

[0205] In some embodiments, when the terminal devices have not been grouped before, the electronic device groups the terminal devices with the same or similar signal space characteristics into one group by clustering the signal space characteristics. In other embodiments, when the terminal devices have been grouped before, the electronic device removes the terminal devices with large signal space characteristics different from other terminal devices in the original terminal device group and adds new terminal devices with similar signal space characteristics to the terminal devices in the group to obtain a new terminal device group.

[0206] Next, in step S1402, the electronic device selects a representative terminal device according to the characteristics of the terminal device. Note that step S1402 is not necessary, and the representative terminal device may also be selected by the electronic device of the target cell instead of the electronic device of the original cell.

[0207] Next, in step S1403, the electronic device determines whether the measurement report meets the cell switching condition based on the measurement report received from one or more terminal devices in the terminal device group. When the measurement report meets the cell switching condition (step S1403 is "yes"), in step S1404, the electronic device sends a cell switching request of the terminal device group to another electronic device serving the target cell. Conversely, when the measurement report does not meet the cell switching condition (step S1403 is "no"), the electronic device returns to make a new determination based on the newly received measurement report.

[0208] In some embodiments, when the reference signal received power RSRP predicted by the terminal device in the target cell exceeds the RSRP predicted in the original cell by a predetermined threshold, the electronic device sends a cell switching request for the terminal device group to another electronic device serving the target cell. In some embodiments, the electronic device calculates the predicted RSRP of the terminal device in the original cell and the target cell using the currently measured RSRP, RSRP change slope and advance time. In some embodiments, the electronic device uses the measured RSRP historical value in the measurement report to fit the estimated RSRP change slope. In some embodiments, the electronic device configures the advance time based on the moving speed of the measured terminal device.

[0209] In some embodiments, the cell switching request of the terminal device group includes a representative terminal device ID selected by the electronic device, that is, a representative terminal device ID recommended to another electronic device in the target cell.

[0210] Next, in step S1405, the electronic device receives a cell handover reply of the terminal device group from another electronic device of the target cell. When the electronic device receives a cell handover reply of the terminal device group from another electronic device of the target cell (step S1405 is "yes"), in step S1406, the electronic device sends a handover command to the terminal device group to instruct the terminal device group to perform a cell handover. On the contrary, when the electronic device does not receive a cell handover reply of the terminal device group from another electronic device of the target cell (step S1405 is "no"), the cell handover ends.

[0211] In some embodiments, the handover command includes a cell radio network temporary identifier C-RNTI of each terminal device in the terminal device group in the target cell.

[0212] As mentioned above, other specific details of cell switching have been described and will not be repeated here.

[0213] <<4. Application Examples>>

[0214] The present disclosure describes an example of a high-speed train communication scenario, but it should be understood that the application scenario of the present disclosure is not limited to the high-speed train communication scenario. The improved solution proposed in the present disclosure can be applied to any mobile communication application scenario with high requirements on resources and reliability.

[0215] It should be noted that the above description is merely exemplary. The embodiments of the present disclosure may also be performed in any other appropriate manner, and the advantageous effects obtained by the embodiments of the present disclosure may still be achieved. Moreover, the embodiments of the present disclosure may also be applied to other similar application examples, and the advantageous effects obtained by the embodiments of the present disclosure may still be achieved.

[0216] It should be understood that the machine executable instructions in the machine readable storage medium or program product according to the embodiment of the present disclosure can be configured to perform operations corresponding to the above-mentioned device and method embodiments. When referring to the above-mentioned device and method embodiments, the embodiments of the machine readable storage medium or program product are clear to those skilled in the art, so they are not repeatedly described. The machine readable storage medium and program product for carrying or including the above-mentioned machine executable instructions also fall within the scope of the present disclosure. Such storage media may include, but are not limited to, floppy disks, optical disks, magneto-optical disks, memory cards, memory sticks, and the like.

[0217] In addition, it should be understood that the above series of processes and devices can also be implemented by software and / or firmware. In the case of being implemented by software and / or firmware, from a storage medium or a network to a computer with a dedicated hardware structure, such as Fig.15 The general-purpose personal computer 1500 shown has programs constituting the software installed therein, and when the various programs are installed therein, the computer can execute various functions and the like. Fig.15 1 is a block diagram showing an example structure of a personal computer of an information processing device that can be adopted in an embodiment of the present disclosure. In one example, the personal computer may correspond to the above-mentioned exemplary terminal device according to the present disclosure.

[0218] exist Fig.15 In the embodiment, a central processing unit (CPU) 1501 executes various processes according to a program stored in a read-only memory (ROM) 1502 or a program loaded from a storage section 1508 to a random access memory (RAM) 1503. In the RAM 1503, data required when the CPU 1501 executes various processes and the like is also stored as needed.

[0219] The CPU 1501, the ROM 1502, and the RAM 1503 are connected to one another via a bus 1504. To the bus 1504, an input / output interface 1505 is also connected.

[0220] The following components are connected to the input / output interface 1505: an input section 1506 including a keyboard, a mouse, etc.; an output section 1507 including a display such as a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 1508 including a hard disk, etc.; and a communication section 1509 including a network interface card such as a LAN card, a modem, etc. The communication section 1509 performs communication processing via a network such as the Internet.

[0221] A drive 1510 is also connected to the input / output interface 1505 as needed. A removable medium 1511 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc. is mounted on the drive 1510 as needed so that a computer program read therefrom is installed into the storage section 1508 as needed.

[0222] In the case where the above-described series of processing is realized by software, a program constituting the software is installed from a network such as the Internet or a storage medium such as the removable medium 1511 .

[0223] Those skilled in the art should understand that such storage media is not limited to Fig.15 The removable medium 1511 shown has a program stored therein and is distributed separately from the device to provide the program to the user. Examples of the removable medium 1511 include magnetic disks (including floppy disks (registered trademark)), optical disks (including compact disk read-only memory (CD-ROM) and digital versatile disks (DVD)), magneto-optical disks (including minidiscs (MD) (registered trademark)), and semiconductor memories. Alternatively, the storage medium may be a ROM 1502, a hard disk included in the storage portion 1508, or the like, in which the program is stored and distributed to the user together with the device containing them.

[0224] The technology of the present disclosure can be applied to various products.

[0225] For example, the electronic device 10 / electronic device 30 according to an embodiment of the present disclosure may be implemented as various control devices / base stations or included in various control devices / base stations. For example, the terminal device 20 according to an embodiment of the present disclosure may be implemented as various terminal devices or included in various terminal devices.

[0226] For example, the electronic device / base station mentioned in the present disclosure may be implemented as any type of base station, such as an eNB, such as a macro eNB and a small eNB. A small eNB may be an eNB that covers a cell smaller than a macro cell, such as a pico eNB, a micro eNB, and a home (femto) eNB. For example, it may be implemented as a gNB, such as a macro gNB and a small gNB. A small gNB may be a gNB that covers a cell smaller than a macro cell, such as a pico gNB, a micro gNB, and a home (femto) gNB. Alternatively, the base station may be implemented as any other type of base station, such as a NodeB and a base transceiver station (Base Transceiver Station, BTS). The base station may include: a main body (also referred to as a base station device) configured to control wireless communication; and one or more remote radio heads (RRH) arranged at a place different from the main body. In addition, the various types of terminals described below may work as a base station by temporarily or semi-persistently performing base station functions.

[0227] For example, the terminal device mentioned in the present disclosure may be implemented as a mobile terminal (such as a smart phone, a tablet personal computer (PC), a notebook PC, a portable game terminal, a portable / dongle-type mobile router, and a digital camera) or a vehicle-mounted terminal (such as a car navigation device) in some embodiments. The terminal device may also be implemented as a terminal that performs machine-to-machine (M2M) communication (also referred to as a machine type communication (MTC) terminal). In addition, the terminal device may be a wireless communication module (such as an integrated circuit module including a single chip) installed on each of the above-mentioned terminals.

[0228] The following will refer to Figures 16 to 19 Application examples according to the present disclosure are described.

[0229] [Example about base station]

[0230] It should be understood that the term electronic device / base station in the present disclosure has the full breadth of its usual meaning and at least includes a wireless communication station used as part of a wireless communication system or a radio system to facilitate communication. Examples of base stations may be, for example, but not limited to, the following: a base station may be one or both of a base transceiver station (BTS) and a base station controller (BSC) in a GSM system, one or both of a radio network controller (RNC) and a Node B in a WCDMA system, an eNB in ​​an LTE and LTE-Advanced system, or a corresponding network node in a future communication system (e.g., a gNB that may appear in a 5G communication system, an eLTE eNB, etc.). Some of the functions in the base station of the present disclosure may also be implemented as an entity that has a control function for communication in D2D, M2M, and V2V communication scenarios, or as an entity that plays a spectrum coordination role in a cognitive radio communication scenario.

[0231] First example

[0232] Fig.16 1 is a block diagram showing a first example of a schematic configuration of an eNB to which the technology of the present disclosure can be applied. The eNB 1600 includes multiple antennas 1610 and a base station device 1620. The base station device 1620 and each antenna 1610 can be connected to each other via an RF cable. In one implementation, the eNB 1600 (or base station device 1620) here can correspond to the above-mentioned electronic device 10 or electronic device 30.

[0233] Each of the antennas 1610 includes a single or multiple antenna elements (such as multiple antenna elements included in a multiple-input multiple-output (MIMO) antenna) and is used for the base station device 1620 to transmit and receive wireless signals. Fig.16 As shown, the eNB 1600 may include multiple antennas 1610. For example, the multiple antennas 1610 may be compatible with multiple frequency bands used by the eNB 1600.

[0234] The base station device 1620 includes a controller 1621 , a memory 1622 , a network interface 1623 , and a wireless communication interface 1625 .

[0235] The controller 1621 may be, for example, a CPU or a DSP, and operates various functions of the higher layers of the base station device 1620. For example, the controller 1621 triggers a cell handover according to a measurement report of the terminal side in the wireless communication system acquired by the wireless communication interface 1625, so that a terminal device group uses one of the terminal devices as a representative terminal device, and switches from the original cell to the target cell in groups. The controller 1621 may have a logical function of performing the following control: the control may be such as radio resource control, radio bearer control, mobility management, access control, and scheduling. The control may be performed in conjunction with a nearby eNB or core network node. The memory 1622 includes a RAM and a ROM, and stores programs executed by the controller 1621 and various types of control data (such as handover permission data and handover command data).

[0236] The network interface 1623 is a communication interface for connecting the base station device 1620 to the core network 1624. The controller 1621 can communicate with the core network node or another eNB via the network interface 1623. In this case, the eNB 1600 and the core network node or other eNBs can be connected to each other through a logical interface (such as an S1 interface and an X2 interface). The network interface 1623 can also be a wired communication interface or a wireless communication interface for a wireless backhaul line. If the network interface 1623 is a wireless communication interface, the network interface 1623 can use a higher frequency band for wireless communication compared to the frequency band used by the wireless communication interface 1625.

[0237] The wireless communication interface 1625 supports any cellular communication scheme (such as long term evolution (LTE) and LTE-Advanced), and provides a wireless connection to a terminal located in a cell of the eNB 1600 via an antenna 1610. The wireless communication interface 1625 may generally include, for example, a baseband (BB) processor 1626 and an RF circuit 1627. The BB processor 1626 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and perform various types of signal processing of layers (such as L1, medium access control (MAC), radio link control (RLC), and packet data convergence protocol (PDCP)). Instead of the controller 1621, the BB processor 1626 may have a part or all of the above-mentioned logical functions. The BB processor 1626 may be a memory storing a communication control program, or a module including a processor configured to execute a program and related circuits. Updating the program may change the function of the BB processor 1626. The module may be a card or a blade inserted into a slot of the base station device 1620. Alternatively, the module may also be a chip mounted on a card or a blade. Meanwhile, the RF circuit 1627 may include, for example, a mixer, a filter, and an amplifier, and transmit and receive wireless signals via the antenna 1610. Fig.16An example is shown in which one RF circuit 1627 is connected to one antenna 1610 , but the present disclosure is not limited to this illustration, and one RF circuit 1627 may be connected to a plurality of antennas 1610 at the same time.

[0238] like Fig.16 As shown, the wireless communication interface 1625 may include multiple BB processors 1626. For example, the multiple BB processors 1626 may be compatible with multiple frequency bands used by the eNB 1600. Fig.16 As shown, the wireless communication interface 1625 may include multiple RF circuits 1627. For example, the multiple RF circuits 1627 may be compatible with multiple antenna elements. Fig.16 An example is shown in which the wireless communication interface 1625 includes a plurality of BB processors 1626 and a plurality of RF circuits 1627 , but the wireless communication interface 1625 may also include a single BB processor 1626 or a single RF circuit 1627 .

[0239] Second example

[0240] Fig.17 17 is a block diagram showing a second example of a schematic configuration of an eNB to which the technology of the present disclosure can be applied. The eNB 1700 includes a plurality of antennas 1710, an RRH 1720, and a base station device 1730. The RRH 1720 and each antenna 1710 can be connected to each other via an RF cable. The base station device 1730 and the RRH 1720 can be connected to each other via a high-speed line such as an optical fiber cable. In one implementation, the eNB 1700 (or the base station device 1730) here may correspond to the electronic device 10 or the electronic device 30 described above.

[0241] Each of the antennas 1710 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used for the RRH 1720 to transmit and receive wireless signals. Fig.17 As shown, the eNB 1700 may include multiple antennas 1710. For example, the multiple antennas 1710 may be compatible with multiple frequency bands used by the eNB 1700.

[0242] The base station device 1730 includes a controller 1731, a memory 1732, a network interface 1733, a wireless communication interface 1734, and a connection interface 1736. The controller 1731, the memory 1732, and the network interface 1733 are similar to the reference Fig.16 The controller 1621, memory 1622, and network interface 1623 described are the same.

[0243] The wireless communication interface 1734 supports any cellular communication scheme (such as LTE and LTE-Advanced), and provides wireless communication to a terminal located in a sector corresponding to the RRH 1720 via the RRH 1720 and the antenna 1710. The wireless communication interface 1734 may generally include, for example, a BB processor 1735. In addition to the BB processor 1735 being connected to the RF circuit 1722 of the RRH 1720 via the connection interface 1736, the BB processor 1735 is connected to the reference RF circuit 1722 of the RRH 1720. Fig.16 The same as the BB processor 1626 described above. Fig.17 As shown, the wireless communication interface 1734 may include multiple BB processors 1735. For example, the multiple BB processors 1735 may be compatible with multiple frequency bands used by the eNB 1700. Fig.17 An example is shown in which the wireless communication interface 1734 includes a plurality of BB processors 1735 , but the wireless communication interface 1734 may also include a single BB processor 1735 .

[0244] The connection interface 1736 is an interface for connecting the base station device 1730 (wireless communication interface 1734) to the RRH 1720. The connection interface 1736 may also be a communication module for connecting the base station device 1730 (wireless communication interface 1734) to the RRH 1720 for communication in the above-mentioned high-speed line.

[0245] The RRH 1720 includes a connection interface 1723 and a wireless communication interface 1721 .

[0246] The connection interface 1723 is an interface for connecting the RRH 1720 (wireless communication interface 1721) to the base station device 1730. The connection interface 1723 may also be a communication module for communication in the above-mentioned high-speed line.

[0247] The wireless communication interface 1721 transmits and receives wireless signals via the antenna 1710. The wireless communication interface 1721 may generally include, for example, an RF circuit 1722. The RF circuit 1722 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives wireless signals via the antenna 1710. Fig.17 An example is shown in which one RF circuit 1722 is connected to one antenna 1710 , but the present disclosure is not limited to this illustration, and one RF circuit 1722 may be connected to a plurality of antennas 1710 at the same time.

[0248] like Fig.17 As shown, the wireless communication interface 1721 may include multiple RF circuits 1722. For example, the multiple RF circuits 1722 may support multiple antenna elements. Fig.17An example is shown in which the wireless communication interface 1721 includes a plurality of RF circuits 1722 , but the wireless communication interface 1721 may also include a single RF circuit 1722 .

[0249] [Example about user equipment]

[0250] First example

[0251] Fig.18 1 is a block diagram showing an example of a schematic configuration of a smart phone 1800 to which the technology of the present disclosure can be applied. The smart phone 1800 includes a processor 1801, a memory 1802, a storage device 1803, an external connection interface 1804, a camera device 1806, a sensor 1807, a microphone 1808, an input device 1809, a display device 1810, a speaker 1811, a wireless communication interface 1812, one or more antenna switches 1815, one or more antennas 1816, a bus 1817, a battery 1818, and an auxiliary controller 1819. In one implementation, the smart phone 1800 (or the processor 1801) herein may correspond to the terminal device 20 described above.

[0252] The processor 1801 may be, for example, a CPU or a system on chip (SoC), and controls the functions of the application layer and other layers of the smartphone 1800. The memory 1802 includes a RAM and a ROM, and stores data and programs executed by the processor 1801. The storage device 1803 may include a storage medium such as a semiconductor memory and a hard disk. The external connection interface 1804 is an interface for connecting an external device (such as a memory card and a universal serial bus (USB) device) to the smartphone 1800.

[0253] The camera device 1806 includes an image sensor such as a charge coupled device (CCD) and a complementary metal oxide semiconductor (CMOS), and generates a captured image. The sensor 1807 may include a group of sensors such as a measurement sensor, a gyro sensor, a geomagnetic sensor, and an acceleration sensor. The microphone 1808 converts the sound input to the smart phone 1800 into an audio signal. The input device 1809 includes, for example, a touch sensor, a keypad, a keyboard, a button, or a switch configured to detect a touch on the screen of the display device 1810, and receives an operation or information input from a user. The display device 1810 includes a screen such as a liquid crystal display (LCD) and an organic light emitting diode (OLED) display, and displays an output image of the smart phone 1800. The speaker 1811 converts the audio signal output from the smart phone 1800 into sound.

[0254] The wireless communication interface 1812 supports any cellular communication scheme (such as LTE and LTE-Advanced), and performs wireless communication. The wireless communication interface 1812 may generally include, for example, a BB processor 1813 and an RF circuit 1814. The BB processor 1813 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and perform various types of signal processing for wireless communication. Meanwhile, the RF circuit 1814 may include, for example, a mixer, a filter, and an amplifier, and transmit and receive wireless signals via an antenna 1816. The wireless communication interface 1812 may be a chip module on which the BB processor 1813 and the RF circuit 1814 are integrated. Fig.18 As shown, the wireless communication interface 1812 may include multiple BB processors 1813 and multiple RF circuits 1814. Fig.18 An example is shown in which the wireless communication interface 1812 includes a plurality of BB processors 1813 and a plurality of RF circuits 1814 , but the wireless communication interface 1812 may also include a single BB processor 1813 or a single RF circuit 1814 .

[0255] In addition, in addition to the cellular communication scheme, the wireless communication interface 1812 can support other types of wireless communication schemes, such as short-range wireless communication schemes, near field communication schemes, and wireless local area network (LAN) schemes. In this case, the wireless communication interface 1812 can include a BB processor 1813 and an RF circuit 1814 for each wireless communication scheme.

[0256] Each of the antenna switches 1815 switches a connection destination of the antenna 1816 between a plurality of circuits (eg, circuits for different wireless communication schemes) included in the wireless communication interface 1812 .

[0257] Each of the antennas 1816 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used for the wireless communication interface 1812 to transmit and receive wireless signals. Fig.18 As shown, the smart phone 1800 may include multiple antennas 1816. Fig.18 An example is shown in which the smart phone 1800 includes a plurality of antennas 1816 , but the smart phone 1800 may also include a single antenna 1816 .

[0258] In addition, the smartphone 1800 may include an antenna 1816 for each wireless communication scheme. In this case, the antenna switch 1815 may be omitted from the configuration of the smartphone 1800.

[0259] The bus 1817 connects the processor 1801, the memory 1802, the storage device 1803, the external connection interface 1804, the camera 1806, the sensor 1807, the microphone 1808, the input device 1809, the display device 1810, the speaker 1811, the wireless communication interface 1812, and the auxiliary controller 1819 to each other. Fig.18 The various blocks of the smartphone 1800 shown are supplied with power, the feed lines being partially shown as dashed lines in the figure. The auxiliary controller 1819 operates the minimum necessary functions of the smartphone 1800, for example in a sleep mode.

[0260] Second example

[0261] Fig.19 1 is a block diagram showing an example of a schematic configuration of a car navigation device 1900 to which the technology of the present disclosure can be applied. The car navigation device 1900 includes a processor 1901, a memory 1902, a global positioning system (GPS) module 1904, a sensor 1905, a data interface 1906, a content player 1907, a storage medium interface 1908, an input device 1909, a display device 1910, a speaker 1911, a wireless communication interface 1913, one or more antenna switches 1916, one or more antennas 1917, and a battery 1918. In one implementation, the car navigation device 1900 (or the processor 1901) herein may correspond to the terminal device 20.

[0262] The processor 1901 may be, for example, a CPU or an SoC, and controls a navigation function and other functions of the car navigation device 1900. The memory 1902 includes a RAM and a ROM, and stores data and a program executed by the processor 1901.

[0263] The GPS module 1904 measures the position (such as latitude, longitude and altitude) of the car navigation device 1900 using GPS signals received from GPS satellites. The sensor 1905 may include a group of sensors such as a gyro sensor, a geomagnetic sensor and an air pressure sensor. The data interface 1906 is connected to, for example, an in-vehicle network 1921 via an unshown terminal and acquires data (such as vehicle speed data) generated by the vehicle.

[0264] The content player 1907 reproduces content stored in a storage medium such as a CD and a DVD, which is inserted into the storage medium interface 1908. The input device 1909 includes, for example, a touch sensor, a button, or a switch configured to detect a touch on the screen of the display device 1910, and receives an operation or information input from a user. The display device 1910 includes a screen such as an LCD or an OLED display, and displays an image of a navigation function or reproduced content. The speaker 1911 outputs the sound of the navigation function or the reproduced content.

[0265] The wireless communication interface 1913 supports any cellular communication scheme (such as LTE and LTE-Advanced), and performs wireless communication. The wireless communication interface 1913 may generally include, for example, a BB processor 1914 and an RF circuit 1915. The BB processor 1914 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and perform various types of signal processing for wireless communication. Meanwhile, the RF circuit 1915 may include, for example, a mixer, a filter, and an amplifier, and transmit and receive wireless signals via an antenna 1917. The wireless communication interface 1913 may also be a chip module on which the BB processor 1914 and the RF circuit 1915 are integrated. Fig.19 As shown, the wireless communication interface 1913 may include multiple BB processors 1914 and multiple RF circuits 1915. Fig.19 An example is shown in which the wireless communication interface 1913 includes a plurality of BB processors 1914 and a plurality of RF circuits 1915 , but the wireless communication interface 1913 may also include a single BB processor 1914 or a single RF circuit 1915 .

[0266] In addition, in addition to the cellular communication scheme, the wireless communication interface 1913 can support other types of wireless communication schemes, such as short-range wireless communication schemes, near field communication schemes, and wireless LAN schemes. In this case, for each wireless communication scheme, the wireless communication interface 1913 can include a BB processor 1914 and an RF circuit 1915.

[0267] Each of the antenna switches 1916 switches a connection destination of the antenna 1917 between a plurality of circuits included in the wireless communication interface 1913 , such as circuits for different wireless communication schemes.

[0268] Each of the antennas 1917 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used for the wireless communication interface 1913 to transmit and receive wireless signals. Fig.19 As shown, the car navigation device 1900 may include multiple antennas 1917. Fig.19An example is shown in which the car navigation device 1900 includes a plurality of antennas 1917 , but the car navigation device 1900 may also include a single antenna 1917 .

[0269] In addition, the car navigation device 1900 may include an antenna 1917 for each wireless communication scheme. In this case, the antenna switch 1916 may be omitted from the configuration of the car navigation device 1900.

[0270] Battery 1918 is fed via a feeder Fig.19 The respective blocks of the illustrated car navigation device 1900 are supplied with electric power, and feed lines are partially illustrated as dotted lines in the figure. The battery 1918 accumulates electric power supplied from the vehicle.

[0271] The technology of the present disclosure may also be implemented as an in-vehicle system (or vehicle) 1920 including a car navigation device 1900, an in-vehicle network 1921, and one or more blocks in a vehicle module 1922. The vehicle module 1922 generates vehicle data (such as vehicle speed, engine speed, and fault information), and outputs the generated data to the in-vehicle network 1921.

[0272] <<5. Conclusion>>

[0273] Referenced above Figures 1 to 19 The embodiments of the present disclosure are described in detail. As described above, the electronic device according to the embodiments of the present disclosure can perform cell switching on the terminal equipment on the high-speed transportation vehicle based on the grouped cell switching technology and the predicted cell switching technology. According to the embodiments of the present disclosure, it is possible to accurately identify the users on the high-speed transportation vehicle, and perform cell switching on the users on the high-speed transportation vehicle in groups at the same time, which significantly improves the switching speed, and only selects one representative user in each group for random access. Through the design of grouped cell switching requests and cell switching replies, the resource overhead when a large number of users perform cell switching at the same time is significantly reduced, and the probability of random access conflicts and switching delays when a large number of users perform cell switching at the same time are also reduced. In addition, the cell switching can be triggered in advance based on the prediction, thereby effectively reducing the probability of switching failure. Furthermore, the present disclosure also proposes a scheme of reserving only the leading sequence corresponding to part of the SSB, thereby further reducing the resource overhead during the cell switching process.

[0274] The exemplary embodiments of the present disclosure are described above with reference to the accompanying drawings, but the present disclosure is certainly not limited to the above examples. Those skilled in the art may obtain various changes and modifications within the scope of the appended claims, and it should be understood that these changes and modifications will naturally fall within the technical scope of the present disclosure.

[0275] It should be understood that the machine executable instructions in the machine readable storage medium or program product according to the embodiment of the present disclosure can be configured to perform operations corresponding to the above-mentioned device and method embodiments. When referring to the above-mentioned device and method embodiments, the embodiments of the machine readable storage medium or program product are clear to those skilled in the art, so they are not repeatedly described. The machine readable storage medium and program product for carrying or including the above-mentioned machine executable instructions also fall within the scope of the present disclosure. Such storage media may include, but are not limited to, floppy disks, optical disks, magneto-optical disks, memory cards, memory sticks, and the like.

[0276] In addition, it should be understood that the above series of processes and devices can also be implemented by software and / or firmware. In the case of being implemented by software and / or firmware, the storage medium of the relevant device stores the corresponding program constituting the corresponding software, and when the program is executed, various functions can be performed.

[0277] For example, a plurality of functions included in one unit in the above embodiments may be implemented by separate devices. Alternatively, a plurality of functions implemented by a plurality of units in the above embodiments may be implemented by separate devices, respectively. In addition, one of the above functions may be implemented by a plurality of units. Needless to say, such a configuration is included in the technical scope of the present disclosure.

[0278] In this specification, the steps described in the flowchart include not only the processing performed in time series in the order described, but also the processing performed in parallel or individually rather than necessarily in time series. In addition, even in the steps processed in time series, it goes without saying that the order can be appropriately changed.

[0279] Exemplary embodiments of the present disclosure implement

[0280] According to the embodiments of the present disclosure, various implementations of the concepts of the present disclosure can be conceived, including but not limited to:

[0281] Example embodiment 1. An electronic device for a control side of a wireless communication system, comprising a processing circuit, wherein the processing circuit is configured to:

[0282] A representative terminal device is selected from a plurality of terminal devices in the terminal device group, so that the terminal device group can use the representative terminal device as a representative of the terminal device group and switch from an original cell to a target cell served by the electronic device in a group unit.

[0283] Example embodiment 2. The electronic device as described in Example embodiment 1, wherein

[0284] The representative terminal device is reserved with non-contention random access resources.

[0285] Exemplary embodiment 3. The electronic device as described in Exemplary embodiment 1, wherein

[0286] Each terminal device in the terminal device group has the same or similar signal space characteristics.

[0287] Example embodiment 4. The electronic device as described in Example embodiment 3, wherein

[0288] In the case that the terminal devices have been grouped in the original cell, another electronic device accessed by the terminal devices in the original cell obtains the terminal device group by removing terminal devices in the original terminal device group whose signal space characteristics are greatly different from those of other terminal devices in the group, and adding new terminal devices whose signal space characteristics are similar to those of the terminal devices in the group.

[0289] Example 5. The electronic device as described in Example 3, wherein

[0290] In the case where the terminal device is not grouped in the original cell, another electronic device accessed by the terminal device in the original cell obtains the terminal device group by clustering the signal space features.

[0291] Exemplary embodiment 6. The electronic device as described in any one of exemplary embodiments 3-5, wherein

[0292] The signal spatial characteristics include one or more of the following: downlink transmission beam, straight path angle, Doppler frequency shift, path loss and cell switching history.

[0293] Example embodiment 7. The electronic device of example embodiment 1, wherein the processing circuit is further configured to:

[0294] A cell switching request of a terminal device group is received from another electronic device accessed by the terminal device in the original cell.

[0295] Example embodiment 8. The electronic device of example embodiment 7, wherein the processing circuit is further configured to:

[0296] The representative terminal device is selected based on the representative terminal device ID recommended by the other electronic device included in the cell switching request of the terminal device group.

[0297] Example embodiment 9. The electronic device of example embodiment 1, wherein the processing circuit is further configured to:

[0298] The representative terminal device is randomly selected.

[0299] Example 10. The electronic device as described in Example 7, wherein

[0300] The cell switching request of the terminal device group includes terminal device-specific information, and the terminal device-specific information includes a timing advance TA value of each terminal device in the terminal device group in the original cell.

[0301] Example embodiment 11. The electronic device of Example embodiment 7, wherein the processing circuit is further configured to:

[0302] In response to the cell switching request of the terminal device group, a cell switching response of the terminal device group is sent to the other electronic device.

[0303] Example embodiment 12. The electronic device as described in Example embodiment 11, wherein

[0304] The cell switching response of the terminal device group includes terminal device-specific information, and the terminal device-specific information includes the ID of one or more terminal devices allowed to switch, the ID of the selected representative terminal device, and the configuration information of the non-competitive random access resources reserved for the representative terminal device.

[0305] Example embodiment 13. The electronic device as described in Example embodiment 11, wherein

[0306] The cell handover reply of the terminal device group includes a cell radio network temporary identifier C-RNTI of each terminal device in the terminal device group in the target cell.

[0307] Example embodiment 14. The electronic device as described in Example embodiment 11, wherein

[0308] In response to the cell switching reply of the terminal device group, the other electronic device sends a switching command to the terminal device group; and

[0309] In response to the switching command, all terminal devices in the terminal device group cut off the connection with the original cell and perform downlink synchronization on the target cell.

[0310] Example 15. The electronic device as described in Example 14, wherein

[0311] The handover command includes a random access indicator indicating whether the terminal device is a representative terminal device.

[0312] Example 16. The electronic device of Example 14, wherein

[0313] For the representative terminal device, the switching command includes configuration information of the non-contention random access resources reserved by the electronic device for the representative terminal device.

[0314] Example 17. The electronic device as described in Example 2, wherein

[0315] The representative terminal device randomly accesses the electronic device in the target cell using the reserved non-contention random access resources; and

[0316] The electronic device sends a random access response RAR to all terminal devices in the terminal device group.

[0317] Example 18. The electronic device as described in Example 2, wherein

[0318] The representative terminal device sends a preamble sequence to the electronic device using the reserved non-contention random access resources, thereby accessing the electronic device in the target cell.

[0319] Example embodiment 19. The electronic device as described in Example embodiment 18, wherein

[0320] The time from when the representative terminal device receives the switching command to when it sends the preamble sequence is greater than or equal to the predetermined group waiting window time.

[0321] Example embodiment 20. The electronic device of example embodiment 18, wherein the processing circuit is further configured to:

[0322] Based on the preamble sequence, a timing advance TA value representing the terminal equipment in the target cell is obtained.

[0323] Example embodiment 21. The electronic device of example embodiment 20, wherein the processing circuit is further configured to:

[0324] Calculating the change in the TA value of the representative terminal device in the original cell and the target cell; and

[0325] The TA value of the non-representative terminal device in the target cell is obtained by adding the TA value of the non-representative terminal device in the terminal device group in the original cell to the change in the TA value of the representative terminal device.

[0326] Example embodiment 22. The electronic device of example embodiment 18, wherein the processing circuit is further configured to:

[0327] Based on the preamble sequence, an optimal downlink transmission beam representing the terminal device in the target cell is obtained.

[0328] Example embodiment 23. The electronic device of example embodiment 17, wherein the processing circuit is further configured to:

[0329] The RAR to be sent to the non-representative terminal device is scrambled by using the cell radio network temporary identifier C-RNTI of the non-representative terminal device in the target cell.

[0330] Example embodiment 24. The electronic device as described in Example embodiment 17, wherein

[0331] After completing downlink synchronization, the non-representative terminal device continuously detects the RAR.

[0332] Example embodiment 25. The electronic device of Example embodiment 17, wherein the processing circuit is further configured to:

[0333] Using the uplink transmission resources indicated in the RAR, a switching completion signaling is received from a terminal device that successfully detects the RAR.

[0334] Example 26. The electronic device as described in Example 7, wherein

[0335] The cell switching request of the terminal device group is triggered by a measurement report of one or more terminal devices in the terminal device group.

[0336] Example 27. The electronic device as described in Example 7, wherein

[0337] When the reference signal received power RSRP predicted by the terminal device in the target cell exceeds the RSRP predicted in its original cell by a predetermined threshold, the cell switching request of the terminal device group is triggered.

[0338] Example embodiment 28. The electronic device as described in Example embodiment 27, wherein

[0339] The predicted RSRP of the terminal device in the original cell and the target cell is calculated using the currently measured RSRP, the RSRP change slope and the advance time.

[0340] Example embodiment 29. The electronic device as described in Example embodiment 28, wherein

[0341] The RSRP variation slope is estimated by fitting the measured RSRP historical values.

[0342] Example 30. The electronic device of Example 28, wherein

[0343] The advance time is the difference between the predicted time and the current time.

[0344] Example embodiment 31. The electronic device as described in Example embodiment 28, wherein

[0345] The advance time is configured based on the moving speed of the terminal device being measured.

[0346] Example 32. The electronic device as described in Example 1, wherein

[0347] The leading sequence resources corresponding to a part of the downlink transmission beam of the electronic device for sending the synchronization signal block SSB are reserved only for the representative terminal device.

[0348] Exemplary embodiment 33. A terminal device for a terminal side of a wireless communication system, the terminal device comprising a processing circuit, the processing circuit being configured to:

[0349] An electronic device on the control side of a wireless communication system serving a terminal device is triggered to send a cell switching request for a terminal device group including the terminal device and receive a cell switching reply from the corresponding terminal device group, so that the terminal device group uses one of the terminal devices as a representative terminal device and switches from an original cell served by the electronic device to a target cell as a group.

[0350] Exemplary embodiment 34. The terminal device as described in Exemplary embodiment 33, wherein the processing circuit is further configured to:

[0351] When the terminal device moves along a specific trajectory and the moving speed is greater than a specific threshold, and the measurement report meets the cell switching condition, the electronic device is triggered to send a cell switching request for the terminal device group.

[0352] Exemplary embodiment 35. The terminal device as described in Exemplary embodiment 33, wherein the processing circuit is further configured to:

[0353] receiving a measurement control command from the electronic device; and

[0354] In response to the measurement control command, measurement is performed, and a measurement report is sent to the electronic device.

[0355] Exemplary embodiment 36. The terminal device as described in Exemplary embodiment 33, wherein

[0356] The terminal devices are grouped by the electronic device according to their signal space characteristics and cell switching history.

[0357] Exemplary embodiment 37. The terminal device as described in exemplary embodiment 36, wherein

[0358] The signal spatial feature is estimated by the electronic device based on the uplink reference signal sent by the terminal device.

[0359] Exemplary embodiment 38. The terminal device as described in exemplary embodiment 36, wherein

[0360] The cell switching history is obtained by the electronic device inquiring from a mobility management unit.

[0361] Exemplary embodiment 39. The terminal device as described in Exemplary embodiment 36, wherein

[0362] Terminal devices with the same or similar signal space characteristics are grouped together.

[0363] Example embodiment 40. The terminal device as described in example embodiment 33, wherein

[0364] The terminal device group includes a representative terminal device and one or more non-representative terminal devices.

[0365] Exemplary embodiment 41. The terminal device of exemplary embodiment 33, wherein the processing circuit is further configured to:

[0366] A switching command is received from the electronic device.

[0367] Example embodiment 42. The terminal device according to example embodiment 41, wherein the processing circuit is further configured to:

[0368] In response to the switching command, the terminal device cuts off the connection with the original cell and performs downlink synchronization on the target cell.

[0369] Exemplary embodiment 43. The terminal device according to exemplary embodiment 33, wherein the processing circuit is further configured to:

[0370] When the terminal device is a representative terminal device, randomly accessing another electronic device in the target cell using reserved non-contention random access resources; and

[0371] A random access response (RAR) is received from the other electronic device.

[0372] Exemplary embodiment 44. The terminal device as described in exemplary embodiment 43, wherein the processing circuit is further configured to:

[0373] When the terminal device is a representative terminal device, a preamble sequence is sent to the other electronic device in the target cell using reserved non-contention random access resources, thereby accessing the other electronic device in the target cell.

[0374] Example embodiment 45. The terminal device as described in Example embodiment 43, wherein

[0375] When the terminal device is a non-representative terminal device, the terminal device continuously detects the random access response RAR after completing downlink synchronization.

[0376] Example embodiment 46. The terminal device as described in Example embodiment 43, wherein the processing circuit is further configured to:

[0377] When the terminal device successfully detects the RAR, it uses the uplink transmission resources indicated in the RAR to send a handover completion signaling to another electronic device that the terminal device wants to access in the target cell.

[0378] Example embodiment 47. An electronic device for a control side of a wireless communication system, the electronic device comprising a processing circuit, the processing circuit being configured to:

[0379] A cell switching request of a terminal device group is sent to another electronic device in a target cell, and a cell switching response of a terminal device group is received from the other electronic device, so that the terminal device group uses one of the terminal devices as a representative terminal device and switches from the original cell served by the electronic device to the target cell as a group.

[0380] Example embodiment 48. The electronic device of example embodiment 47, wherein the processing circuit is further configured to:

[0381] The terminal devices served by the terminal device are grouped into one or more terminal device groups, wherein each terminal device group includes a representative terminal device and one or more non-representative terminal devices.

[0382] Example embodiment 49. The electronic device of example embodiment 48, wherein the processing circuit is further configured to:

[0383] The terminal devices are grouped according to their signal space characteristics and cell switching history.

[0384] Example embodiment 50. The electronic device of example embodiment 47, wherein the processing circuit is further configured to:

[0385] Sending a cell switching history query command to the mobility management unit; and

[0386] The cell switching history of the terminal device is received from the mobility management unit.

[0387] Example embodiment 51. The electronic device of example embodiment 47, wherein the processing circuit is further configured to:

[0388] receiving an uplink reference signal from a terminal device; and

[0389] Based on the received uplink reference signal, the signal spatial characteristics of the terminal device are estimated.

[0390] Example embodiment 52. The electronic device of example embodiment 48, wherein the processing circuit is further configured to:

[0391] When the terminal devices are not originally grouped, the terminal devices having the same or similar signal space characteristics are grouped together by clustering the signal space characteristics; and

[0392] When the terminal devices have been originally grouped, a new terminal device group is obtained by removing the terminal devices in the original terminal device group whose signal space characteristics are greatly different from those of other terminal devices in the group and adding new terminal devices whose signal space characteristics are similar to those of the terminal devices in the group.

[0393] Example embodiment 53. The electronic device of example embodiment 47, wherein the processing circuit is further configured to:

[0394] receiving measurement reports from one or more terminal devices in the group of terminal devices; and

[0395] When the measurement report meets the cell switching condition, a cell switching request of the terminal device group is sent to the other electronic device serving the target cell.

[0396] Example embodiment 54. The electronic device as described in Example embodiment 47, wherein

[0397] The cell switching request of the terminal device group includes a representative terminal device ID recommended by the electronic device to the other electronic device.

[0398] Example embodiment 55. The electronic device of example embodiment 47, wherein the processing circuit is further configured to:

[0399] A representative terminal device is selected according to the characteristics of the terminal device, and the ID of the selected representative terminal device is transmitted to the another electronic device.

[0400] Example embodiment 56. The electronic device of example embodiment 47, wherein the processing circuit is further configured to:

[0401] In response to the cell handover reply of the terminal device group, a handover command is sent to the terminal device group.

[0402] Example embodiment 57. The electronic device as described in Example embodiment 56, wherein

[0403] The handover command includes a cell radio network temporary identifier C-RNTI of each terminal device in the terminal device group in the target cell.

[0404] Example embodiment 58. The electronic device of example embodiment 47, wherein the processing circuit is further configured to:

[0405] When the reference signal received power RSRP predicted by the terminal device in the target cell exceeds the RSRP predicted in the original cell by a predetermined threshold, a cell switching request of the terminal device group is sent to another electronic device serving the target cell.

[0406] Example embodiment 59. The electronic device of example embodiment 58, wherein the processing circuit is further configured to:

[0407] The predicted RSRP of the terminal device in the original cell and the target cell is calculated using the currently measured RSRP, RSRP change slope and advance time.

[0408] Example embodiment 60. The electronic device of example embodiment 59, wherein the processing circuit is further configured to:

[0409] The RSRP variation slope is estimated by fitting using the measured RSRP historical values.

[0410] Example embodiment 61. The electronic device of example embodiment 59, wherein the processing circuit is further configured to:

[0411] The advance time is configured based on the moving speed of the terminal device being measured.

[0412] Exemplary embodiment 62. A packet-based cell switching method used in an electronic device for a control side of a wireless communication system, comprising:

[0413] A representative terminal device is selected from a plurality of terminal devices in the terminal device group, so that the terminal device group can use the representative terminal device as a representative of the terminal device group and switch from an original cell to a target cell served by the electronic device in a group unit.

[0414] Exemplary embodiment 63. A packet-based cell switching method used in a terminal device on a terminal side of a wireless communication system, comprising:

[0415] An electronic device on the control side of a wireless communication system serving a terminal device is triggered to send a cell switching request for a terminal device group including the terminal device and receive a cell switching reply from the corresponding terminal device group, so that the terminal device group uses one of the terminal devices as a representative terminal device and switches from an original cell served by the electronic device to a target cell as a group.

[0416] Exemplary embodiment 64. A packet-based cell switching method for use in an electronic device on a control side of a wireless communication system, comprising:

[0417] A cell switching request of a terminal device group is sent to another electronic device in a target cell, and a cell switching response of a terminal device group is received from the other electronic device, so that the terminal device group uses one of the terminal devices as a representative terminal device and switches from the original cell served by the electronic device to the target cell as a group.

[0418] Example embodiment 65. A non-transitory computer-readable storage medium having stored thereon instructions, which when executed by a processor, cause the processor to perform the following operations:

[0419] A representative terminal device is selected from a plurality of terminal devices in the terminal device group, so that the terminal device group can use the representative terminal device as a representative of the terminal device group and switch from the original cell to the target cell in a group unit.

[0420] Example embodiment 66. A non-transitory computer-readable storage medium having stored thereon instructions, which when executed by a processor, cause the processor to perform the following operations:

[0421] An electronic device on the control side of a wireless communication system serving a terminal device is triggered to send a cell switching request for a terminal device group including the terminal device and receive a cell switching reply from the corresponding terminal device group, so that the terminal device group uses one of the terminal devices as a representative terminal device and switches from an original cell served by the electronic device to a target cell as a group.

[0422] Example embodiment 67. A non-transitory computer-readable storage medium having stored thereon instructions, which when executed by a processor, cause the processor to perform the following operations:

[0423] A cell switching request of a terminal device group is sent to another electronic device in the target cell, and a cell switching response of the terminal device group is received from the other electronic device, so that the terminal device group uses one of the terminal devices as a representative terminal device and switches from the original cell to the target cell as a group.

[0424] Exemplary embodiment 68. A device comprising a processor and a non-transitory computer-readable storage medium storing instructions, which when executed by the processor enable the device to perform the methods described in the present disclosure.

[0425] Exemplary embodiment 69. An apparatus comprising means for performing the methods described in this disclosure.

[0426] Although the present disclosure and its advantages have been described in detail, it should be understood that various changes, substitutions and transformations can be made without departing from the spirit and scope of the present disclosure as defined by the appended claims. Moreover, the terms "including", "comprising" or any other variants of the embodiments of the present disclosure are intended to cover non-exclusive inclusions, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the statement "including one..." do not exclude the presence of other identical elements in the process, method, article or equipment including the elements.

Claims

1. An electronic device for a control side of a wireless communication system, comprising a processing circuit, wherein the processing circuit is configured to: Selecting a representative terminal device from a plurality of terminal devices in the terminal device group, so that the terminal device group can use the representative terminal device as a representative of the terminal device group and switch from an original cell to a target cell served by the electronic device in a group unit, in, The processing circuit is further configured to: receiving a cell switching request of a terminal device group from another electronic device accessed by the terminal device in the original cell, Wherein, when the terminal device moves along a specific trajectory and the moving speed is greater than a specific threshold and the predicted reference signal received power RSRP of the terminal device in the target cell at a predicted time after the current time exceeds the predicted RSRP of the terminal device in the original cell at the predicted time by a predetermined threshold, the cell switching request of the terminal device group is triggered, wherein the predicted time is a time after the current time when an advance time pre-configured based on the moving speed of the terminal device has passed, and The predicted RSRP of the terminal device in the original cell and the target cell are calculated independently of each other using the currently measured RSRP, RSRP change slope and advance time in the original cell and the target cell, respectively. Among them, only the preamble sequence resources corresponding to a part of the downlink transmission beams of the electronic device for sending the synchronization signal block SSB are reserved for the representative terminal device, and the part of the downlink transmission beams is obtained by long-term learning of the optimal downlink transmission beam when the terminal device accesses the cell, Wherein, during the switching process to the target cell, the time from when the representative terminal device receives the switching command from the other electronic device to when the representative terminal device sends the leading sequence to the electronic device is greater than or equal to the predetermined group waiting window time, The terminal device group is obtained by clustering high-dimensional feature vectors of multiple terminal devices composed of multiple features of the terminal devices, and the multiple features include cell switching history, downlink transmission beam, path loss, direct path angle and Doppler frequency shift.

2. The electronic device according to claim 1, wherein The representative terminal device is reserved with non-contention random access resources.

3. The electronic device according to claim 1, wherein In the case where the terminal devices have been grouped in the original cell, another electronic device accessed by the terminal devices in the original cell obtains the terminal device group by removing terminal devices in the original terminal device group whose characteristics are greatly different from those of other terminal devices in the group, and adding new terminal devices whose characteristics are similar to those of the terminal devices in the group.

4. The electronic device of claim 1, wherein the processing circuit is further configured to: The representative terminal device is selected based on the representative terminal device ID recommended by the other electronic device included in the cell switching request of the terminal device group.

5. The electronic device of claim 1 , wherein the processing circuit is further configured to: The representative terminal device is randomly selected.

6. The electronic device according to claim 1, wherein The cell switching request of the terminal device group includes terminal device-specific information, and the terminal device-specific information includes a timing advance TA value of each terminal device in the terminal device group in the original cell.

7. The electronic device of claim 1, wherein the processing circuit is further configured to: In response to the cell switching request of the terminal device group, a cell switching response of the terminal device group is sent to the other electronic device.

8. The electronic device according to claim 7, wherein The cell switching response of the terminal device group includes terminal device-specific information, and the terminal device-specific information includes the ID of one or more terminal devices allowed to switch, the ID of the selected representative terminal device, and the configuration information of the non-competitive random access resources reserved for the representative terminal device.

9. The electronic device according to claim 7, wherein The cell handover reply of the terminal device group includes a cell radio network temporary identifier C-RNTI of each terminal device in the terminal device group in the target cell.

10. The electronic device according to claim 7, wherein In response to the cell switching reply of the terminal device group, the other electronic device sends a switching command to the terminal device group; and In response to the switching command, all terminal devices in the terminal device group cut off the connection with the original cell and perform downlink synchronization on the target cell.

11. The electronic device according to claim 10, wherein The handover command includes a random access indicator indicating whether the terminal device is a representative terminal device.

12. The electronic device according to claim 10, wherein For the representative terminal device, the switching command includes configuration information of the non-contention random access resources reserved by the electronic device for the representative terminal device.

13. The electronic device according to claim 2, wherein The representative terminal device randomly accesses the electronic device in the target cell using the reserved non-contention random access resources; and The electronic device sends a random access response RAR to all terminal devices in the terminal device group.

14. The electronic device according to claim 2, wherein The representative terminal device sends a preamble sequence to the electronic device using the reserved non-contention random access resources, thereby accessing the electronic device in the target cell.

15. The electronic device of claim 14, wherein the processing circuit is further configured to: Based on the preamble sequence, a timing advance TA value representing the terminal equipment in the target cell is obtained.

16. The electronic device of claim 15, wherein the processing circuit is further configured to: Calculating the change in the TA value of the representative terminal device in the original cell and the target cell; and The TA value of the non-representative terminal device in the target cell is obtained by adding the TA value of the non-representative terminal device in the terminal device group in the original cell to the change in the TA value of the representative terminal device.

17. The electronic device of claim 14, wherein the processing circuit is further configured to: Based on the preamble sequence, an optimal downlink transmission beam representing the terminal device in the target cell is obtained.

18. The electronic device of claim 13, wherein the processing circuit is further configured to: The RAR to be sent to the non-representative terminal device is scrambled by using the cell radio network temporary identifier C-RNTI of the non-representative terminal device in the target cell.

19. The electronic device of claim 13, wherein After completing downlink synchronization, the non-representative terminal device continuously detects the RAR.

20. The electronic device of claim 13, wherein the processing circuit is further configured to: Using the uplink transmission resources indicated in the RAR, a switching completion signaling is received from a terminal device that successfully detects the RAR.

21. The electronic device of claim 1, wherein The RSRP variation slope is estimated by fitting the measured RSRP historical values.

22. The electronic device of claim 1, wherein The advance time is the difference between the predicted time and the current time.

23. A terminal device for a terminal side of a wireless communication system, the terminal device comprising a processing circuit, the processing circuit being configured to: triggering an electronic device on the control side of a wireless communication system serving a terminal device to send a cell switching request of a terminal device group including the terminal device and receive a cell switching reply of the corresponding terminal device group, so that the terminal device group uses one of the terminal devices as a representative terminal device and switches from an original cell served by the electronic device to a target cell in a group unit, The processing circuit is further configured to: When the terminal device moves along a specific trajectory and the moving speed is greater than a specific threshold, and the predicted reference signal received power RSRP of the terminal device in the target cell at a predicted time after the current time exceeds the predicted RSRP of the terminal device in the original cell at the predicted time by a predetermined threshold, the electronic device is triggered to send a cell switching request for the terminal device group, wherein the predicted time is a time after the current time when an advance time pre-configured based on the moving speed of the terminal device has passed, and in, The predicted RSRP of the terminal device in the original cell and the target cell are calculated independently of each other using the currently measured RSRP, RSRP change slope and advance time in the original cell and the target cell respectively. Wherein, when the terminal device is a representative terminal device, the terminal device is reserved with a preamble sequence resource corresponding to a part of the downlink transmission beam of the electronic device for sending a synchronization signal block SSB, and the part of the downlink transmission beam is obtained by long-term learning of the optimal downlink transmission beam when the terminal device accesses the cell, Wherein, during the switching process to the target cell, the time from when the representative terminal device receives the switching command from the electronic device to when the representative terminal device sends the leading sequence to another electronic device of the target cell is greater than or equal to the predetermined group waiting window time, The terminal device group is obtained by clustering high-dimensional feature vectors of multiple terminal devices composed of multiple features of the terminal devices, and the multiple features include cell switching history, downlink transmission beam, path loss, direct path angle and Doppler frequency shift.

24. The terminal device according to claim 23, wherein the processing circuit is further configured to: receiving a measurement control command from the electronic device; and In response to the measurement control command, measurement is performed, and a measurement report is sent to the electronic device.

25. The terminal device according to claim 23, wherein The downlink transmission beam, path loss, straight path angle and Doppler frequency shift are estimated by the electronic device based on the uplink reference signal sent by the terminal device.

26. The terminal device according to claim 23, wherein The cell switching history is obtained by the electronic device inquiring from a mobility management unit.

27. The terminal device according to claim 23, wherein Terminal devices with the same or similar signal space characteristics are grouped together.

28. The terminal device according to claim 23, wherein The terminal device group includes a representative terminal device and one or more non-representative terminal devices.

29. The terminal device according to claim 23, wherein the processing circuit is further configured to: A switching command is received from the electronic device.

30. The terminal device according to claim 29, wherein the processing circuit is further configured to: In response to the switching command, the terminal device cuts off the connection with the original cell and performs downlink synchronization on the target cell.

31. The terminal device according to claim 23, wherein the processing circuit is further configured to: When the terminal device is a representative terminal device, randomly accessing another electronic device in the target cell using reserved non-contention random access resources; and A random access response (RAR) is received from the other electronic device.

32. The terminal device according to claim 31, wherein the processing circuit is further configured to: When the terminal device is a representative terminal device, a preamble sequence is sent to the other electronic device in the target cell using reserved non-contention random access resources, thereby accessing the other electronic device in the target cell.

33. The terminal device as claimed in claim 31, wherein When the terminal device is a non-representative terminal device, the terminal device continuously detects the random access response RAR after completing downlink synchronization.

34. The terminal device according to claim 31, wherein the processing circuit is further configured to: When the terminal device successfully detects the RAR, it uses the uplink transmission resources indicated in the RAR to send a handover completion signaling to another electronic device that the terminal device wants to access in the target cell.

35. An electronic device for a control side of a wireless communication system, the electronic device comprising a processing circuit, the processing circuit being configured to: Sending a cell switching request of a terminal device group to another electronic device in the target cell and receiving a cell switching reply of the terminal device group from the other electronic device, so that the terminal device group uses one of the terminal devices as a representative terminal device and switches from the original cell served by the electronic device to the target cell in a group unit, in, The processing circuit is further configured to: When the terminal device moves along a specific trajectory and the moving speed is greater than a specific threshold and the predicted reference signal received power RSRP of the terminal device in the target cell at a predicted time after the current time exceeds the predicted RSRP of the terminal device in the original cell at the predicted time by a predetermined threshold, a cell switching of the terminal device group is sent to another electronic device serving the target cell, wherein the predicted time is a time after the current time when an advance time pre-configured based on the moving speed of the terminal device has passed, and The predicted RSRP of the terminal device in the original cell and the target cell is calculated independently of each other using the currently measured RSRP, RSRP change slope and advance time in the original cell and the target cell, respectively. Among them, only the preamble sequence resources corresponding to a part of the downlink transmission beams of the electronic device for sending the synchronization signal block SSB are reserved for the representative terminal device, and the part of the downlink transmission beams is obtained by long-term learning of the optimal downlink transmission beam when the terminal device accesses the cell, Wherein, during the switching process to the target cell, the time from when the representative terminal device receives the switching command from the electronic device to when the representative terminal device sends the leading sequence to the other electronic device is greater than or equal to the predetermined group waiting window time, The terminal device group is obtained by clustering high-dimensional feature vectors of multiple terminal devices composed of multiple features of the terminal devices, and the multiple features include cell switching history, downlink transmission beam, path loss, direct path angle and Doppler frequency shift.

36. The electronic device of claim 35, wherein the processing circuit is further configured to: The terminal devices served by the terminal device are grouped into one or more terminal device groups, wherein each terminal device group includes a representative terminal device and one or more non-representative terminal devices.

37. The electronic device of claim 35, wherein the processing circuit is further configured to: Sending a cell switching history query command to the mobility management unit; and The cell switching history of the terminal device is received from the mobility management unit.

38. The electronic device of claim 35, wherein the processing circuit is further configured to: receiving an uplink reference signal from a terminal device; and Based on the received uplink reference signal, the downlink transmit beam, path loss, straight path angle and Doppler frequency shift of the terminal device are estimated.

39. The electronic device of claim 36, wherein the processing circuit is further configured to: When the terminal devices have been grouped originally, a new terminal device group is obtained by removing the terminal devices with greatly different characteristics from other terminal devices in the original terminal device group and adding new terminal devices with similar characteristics to the terminal devices in the group.

40. The electronic device of claim 35, wherein the processing circuit is further configured to: receiving measurement reports from one or more terminal devices in the group of terminal devices; and When the measurement report meets the cell switching condition, a cell switching request of the terminal device group is sent to the other electronic device serving the target cell.

41. The electronic device of claim 35, wherein The cell switching request of the terminal device group includes a representative terminal device ID recommended by the electronic device to the other electronic device.

42. The electronic device of claim 35, wherein the processing circuit is further configured to: A representative terminal device is selected according to the characteristics of the terminal device, and the ID of the selected representative terminal device is transmitted to the another electronic device.

43. The electronic device of claim 35, wherein the processing circuit is further configured to: In response to the cell handover reply of the terminal device group, a handover command is sent to the terminal device group.

44. The electronic device of claim 43, wherein The handover command includes a cell radio network temporary identifier C-RNTI of each terminal device in the terminal device group in the target cell.

45. The electronic device of claim 35, wherein the processing circuit is further configured to: The RSRP variation slope is estimated by fitting using the measured RSRP historical values.

46. ​​A packet-based cell switching method used in an electronic device on a control side of a wireless communication system, include: Selecting a representative terminal device from a plurality of terminal devices in the terminal device group, so that the terminal device group can use the representative terminal device as a representative of the terminal device group and switch from an original cell to a target cell served by the electronic device in a group unit, The cell switching method further comprises: receiving a cell switching request of a terminal device group from another electronic device accessed by the terminal device in the original cell, Wherein, when the terminal device moves along a specific trajectory and the moving speed is greater than a specific threshold and the predicted reference signal received power RSRP of the terminal device in the target cell at a predicted time after the current time exceeds the predicted RSRP of the terminal device in the original cell at the predicted time by a predetermined threshold, the cell switching request of the terminal device group is triggered, wherein the predicted time is a time after the current time when an advance time pre-configured based on the moving speed of the terminal device has passed, and The predicted RSRP of the terminal device in the original cell and the target cell are calculated independently of each other using the currently measured RSRP, RSRP change slope and advance time in the original cell and the target cell, respectively. Among them, only the preamble sequence resources corresponding to a part of the downlink transmission beams of the electronic device for sending the synchronization signal block SSB are reserved for the representative terminal device, and the part of the downlink transmission beams is obtained by long-term learning of the optimal downlink transmission beam when the terminal device accesses the cell, Wherein, during the switching process to the target cell, the time from when the representative terminal device receives the switching command from the other electronic device to when the representative terminal device sends the leading sequence to the electronic device is greater than or equal to the predetermined group waiting window time, The terminal device group is obtained by clustering high-dimensional feature vectors of multiple terminal devices composed of multiple features of the terminal devices, and the multiple features include cell switching history, downlink transmission beam, path loss, direct path angle and Doppler frequency shift.

47. A packet-based cell switching method used in a terminal device on the terminal side of a wireless communication system, include: triggering an electronic device on the control side of a wireless communication system serving a terminal device to send a cell switching request of a terminal device group including the terminal device and receive a cell switching reply of the corresponding terminal device group, so that the terminal device group uses one of the terminal devices as a representative terminal device and switches from an original cell served by the electronic device to a target cell in a group unit, The cell switching method further comprises: When the terminal device moves along a specific trajectory and the moving speed is greater than a specific threshold, and the predicted reference signal received power RSRP of the terminal device in the target cell at a predicted time after the current time exceeds the predicted RSRP of the terminal device in the original cell at the predicted time by a predetermined threshold, the electronic device is triggered to send a cell switching request for the terminal device group, wherein the predicted time is a time after the current time when an advance time pre-configured based on the moving speed of the terminal device has passed, and The predicted RSRP of the terminal device in the original cell and the target cell is calculated independently of each other using the currently measured RSRP, RSRP change slope and advance time in the original cell and the target cell, respectively. Among them, only the preamble sequence resources corresponding to a part of the downlink transmission beams of the electronic device for sending the synchronization signal block SSB are reserved for the representative terminal device, and the part of the downlink transmission beams is obtained by long-term learning of the optimal downlink transmission beam when the terminal device accesses the cell, Wherein, during the switching process to the target cell, the time from when the representative terminal device receives the switching command from the electronic device to when the representative terminal device sends the leading sequence to another electronic device of the target cell is greater than or equal to the predetermined group waiting window time, The terminal device group is obtained by clustering high-dimensional feature vectors of multiple terminal devices composed of multiple features of the terminal devices, and the multiple features include cell switching history, downlink transmission beam, path loss, direct path angle and Doppler frequency shift.

48. A packet-based cell switching method used in an electronic device on a control side of a wireless communication system, include: Sending a cell switching request of a terminal device group to another electronic device in the target cell and receiving a cell switching reply of the terminal device group from the other electronic device, so that the terminal device group uses one of the terminal devices as a representative terminal device and switches from the original cell served by the electronic device to the target cell in a group unit, Wherein, the method further comprises: When the terminal device moves along a specific trajectory and the moving speed is greater than a specific threshold and the predicted reference signal received power RSRP of the terminal device in the target cell at a predicted time after the current time exceeds the predicted RSRP of the terminal device in the original cell at the predicted time by a predetermined threshold, a cell switching request of the terminal device group is sent to another electronic device serving the target cell, wherein the predicted time is a time after the current time when an advance time pre-configured based on the moving speed of the terminal device has passed, and The predicted RSRP of the terminal device in the original cell and the target cell is calculated independently of each other using the currently measured RSRP, RSRP change slope and advance time in the original cell and the target cell, respectively. A preamble sequence resource corresponding to a part of the downlink transmission beams of the electronic device for transmitting a synchronization signal block SSB is reserved only for the representative terminal device, wherein the part of the downlink transmission beams is obtained by long-term learning of the optimal downlink transmission beam when the terminal device accesses the cell, Wherein, during the switching process to the target cell, the time from when the representative terminal device receives the switching command from the electronic device to when the representative terminal device sends the leading sequence to the other electronic device is greater than or equal to the predetermined group waiting window time, The terminal device group is obtained by clustering high-dimensional feature vectors of multiple terminal devices composed of multiple features of the terminal devices, and the multiple features include cell switching history, downlink transmission beam, path loss, direct path angle and Doppler frequency shift.

49. A non-transitory computer-readable storage medium having stored thereon instructions, which, when executed by a processor, cause the processor to: A representative terminal device is selected from a plurality of terminal devices in the terminal device group, so that the terminal device group can use the representative terminal device as a representative of the terminal device group and switch from the original cell to the target cell in a group unit. in, When the instructions are executed by a processor, the processor further executes: receiving a cell switching request of a terminal device group from another electronic device accessed by the terminal device in the original cell, Wherein, when the terminal device moves along a specific trajectory and the moving speed is greater than a specific threshold and the predicted reference signal received power RSRP of the terminal device in the target cell at a predicted time after the current time exceeds the predicted RSRP of the terminal device in the original cell at the predicted time by a predetermined threshold, the cell switching request of the terminal device group is triggered, wherein the predicted time is a time after the current time when an advance time pre-configured based on the moving speed of the terminal device has passed, and The predicted RSRP of the terminal device in the original cell and the target cell are calculated independently of each other using the currently measured RSRP, RSRP change slope and advance time in the original cell and the target cell, respectively. Among them, only the preamble sequence resources corresponding to a part of the downlink transmission beams of the electronic device for sending the synchronization signal block SSB are reserved for the representative terminal device, and the part of the downlink transmission beams is obtained by long-term learning of the optimal downlink transmission beam when the terminal device accesses the cell, Wherein, during the switching process to the target cell, the time from when the representative terminal device receives the switching command from the other electronic device to when the representative terminal device sends the leading sequence to the electronic device is greater than or equal to the predetermined group waiting window time, The terminal device group is obtained by clustering high-dimensional feature vectors of multiple terminal devices composed of multiple features of the terminal devices, and the multiple features include cell switching history, downlink transmission beam, path loss, direct path angle and Doppler frequency shift.

50. A non-transitory computer-readable storage medium having stored thereon instructions, which, when executed by a processor, cause the processor to: triggering an electronic device on the control side of a wireless communication system serving a terminal device to send a cell switching request of a terminal device group including the terminal device and receive a cell switching reply of the corresponding terminal device group, so that the terminal device group uses one of the terminal devices as a representative terminal device and switches from an original cell served by the electronic device to a target cell in a group unit, in, When the instructions are executed by a processor, the processor further executes: When the terminal device moves along a specific trajectory and the moving speed is greater than a specific threshold, and the predicted reference signal received power RSRP of the terminal device in the target cell at a predicted time after the current time exceeds the predicted RSRP of the terminal device in the original cell at the predicted time by a predetermined threshold, the electronic device is triggered to send a cell switching request for the terminal device group, wherein the predicted time is a time after the current time when an advance time pre-configured based on the moving speed of the terminal device has passed, and The predicted RSRP of the terminal device in the original cell and the target cell is calculated independently of each other using the currently measured RSRP, RSRP change slope and advance time in the original cell and the target cell, respectively. Among them, only the preamble sequence resources corresponding to a part of the downlink transmission beams of the electronic device for sending the synchronization signal block SSB are reserved for the representative terminal device, and the part of the downlink transmission beams is obtained by long-term learning of the optimal downlink transmission beam when the terminal device accesses the cell, Wherein, during the switching process to the target cell, the time from when the representative terminal device receives the switching command from the electronic device to when the representative terminal device sends the leading sequence to another electronic device of the target cell is greater than or equal to the predetermined group waiting window time, The terminal device group is obtained by clustering high-dimensional feature vectors of multiple terminal devices composed of multiple features of the terminal devices, and the multiple features include cell switching history, downlink transmission beam, path loss, direct path angle and Doppler frequency shift.

51. A non-transitory computer-readable storage medium having stored thereon instructions, which, when executed by a processor, cause the processor to: Sending a cell switching request of a terminal device group to another electronic device in the target cell and receiving a cell switching response of the terminal device group from the other electronic device, so that the terminal device group uses one terminal device as a representative terminal device and switches from the original cell to the target cell in a group unit, in, When the instructions are executed by a processor, the processor further executes: When the terminal device moves along a specific trajectory and the moving speed is greater than a specific threshold and the predicted reference signal received power RSRP of the terminal device in the target cell at a predicted time after the current time exceeds the predicted RSRP of the terminal device in the original cell at the predicted time by a predetermined threshold, a cell switching request of the terminal device group is sent to another electronic device serving the target cell, wherein the predicted time is a time after the current time when an advance time pre-configured based on the moving speed of the terminal device has passed, and The predicted RSRP of the terminal device in the original cell and the target cell is calculated independently of each other using the currently measured RSRP, RSRP change slope and advance time in the original cell and the target cell, respectively. Among them, only the preamble sequence resources corresponding to a part of the downlink transmission beams of the electronic device for sending the synchronization signal block SSB are reserved for the representative terminal device, and the part of the downlink transmission beams is obtained by long-term learning of the optimal downlink transmission beam when the terminal device accesses the cell, Wherein, during the switching process to the target cell, the time from when the representative terminal device receives the switching command from the electronic device to when the representative terminal device sends the leading sequence to the other electronic device is greater than or equal to the predetermined group waiting window time, The terminal device group is obtained by clustering high-dimensional feature vectors of multiple terminal devices composed of multiple features of the terminal devices, and the multiple features include cell switching history, downlink transmission beam, path loss, direct path angle and Doppler frequency shift.

52. A device comprising a processor and a non-transitory computer-readable storage medium storing instructions, which, when executed by the processor, enable the device to perform the method of claim 46, 47 or 48.

Images