A communication method and apparatus

Abstract

The application discloses a communication method and device, wherein the method comprises: a terminal device receives reselection configuration information from a serving cell, the reselection configuration information comprising a first frequency point corresponding to the serving cell, a second frequency point corresponding to a neighboring cell of the serving cell, and first indication information, the first indication information being used for indicating that a cell corresponding to the second frequency point comprises an HSDN cell; wherein the reselection priority of the second frequency point is lower than or equal to the reselection priority of the first frequency point; when the moving state of the terminal device is a high-speed state, the cell corresponding to the second frequency point is measured; and according to the measurement result of the cell corresponding to the second frequency point, the terminal device is reselected to the cell corresponding to the second frequency point. By using the above method, if the second frequency point with the same priority or low priority comprises an HSDN cell, the second frequency point can be measured when the moving state of the terminal device is a high-speed state, so that the terminal device is conveniently reselected to the HSDN cell corresponding to the second frequency point, and user experience is improved.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a communication method and device. Background Art

[0002] With the development of wireless communication and rail transit technologies, high-speed rail and other means of transportation have gradually become popular, and high-speed mobility of terminal devices has also become a common application scenario. Due to the limited coverage of base stations, terminal devices may need to reselect cells during high-speed mobility to reselect from the current cell to another cell with better service quality.

[0003] To improve the user experience for passengers on high-speed trains, operators have deployed high-speed dedicated network (HSDN) cells along the lines. However, further research is needed to ensure that terminal devices are able to reselect HSDN cells as much as possible during cell reselection. Summary of the Invention

[0004] The present application provides a communication method and apparatus for reselecting to an HSDN cell when the mobile state of a terminal device is a high-speed state.

[0005] In the first aspect, an embodiment of the present application provides a communication method, which is used to implement functions on the terminal device side. For example, the method can be applied to the terminal device or a chip in the terminal device. The embodiment of the present application does not limit the specific execution subject of the method. Taking the application of this method to the terminal device as an example, in this method, the terminal device receives reselection configuration information from the service cell, and the reselection configuration information includes a first frequency point corresponding to the service cell, a second frequency point corresponding to the neighboring cell of the service cell, and first indication information, and the first indication information is used to indicate that the cell corresponding to the second frequency point includes a high-speed dedicated network HSDN cell; wherein the reselection priority of the second frequency point is lower than or equal to the reselection priority of the first frequency point; when the mobile state of the terminal device is a high-speed state, the cell corresponding to the second frequency point is measured; and according to the measurement result of the cell corresponding to the second frequency point, the cell corresponding to the second frequency point is reselected.

[0006] Using the above method, if the second frequency point of the same priority or lower priority includes an HSDN cell, when the mobile state of the terminal device is high-speed, the second frequency point can be measured, thereby facilitating the terminal device to reselect the HSDN cell corresponding to the second frequency point and improving the user experience.

[0007] In a possible design, the reselection configuration information further includes second indication information, where the second indication information is used to indicate a condition for measuring a cell corresponding to the second frequency point; and when the mobile state of the terminal device is the high-speed state, the measuring the cell corresponding to the second frequency point includes: obtaining a measurement result of the serving cell; and when the measurement result of the serving cell does not satisfy the condition for measuring the cell corresponding to the second frequency point, measuring the cell corresponding to the second frequency point when the mobile state of the terminal device is the high-speed state.

[0008] In a possible design, the measurement result of the serving cell not satisfying the condition for measuring the cell corresponding to the second frequency point includes: a first signal quality index value corresponding to the measurement result of the serving cell being greater than a first threshold value, and a second signal quality index value corresponding to the measurement result of the serving cell being greater than a second threshold value. The first signal quality index value corresponding to the measurement result of the serving cell can be Srxlev of the serving cell, and the second signal quality index value corresponding to the measurement result of the serving cell can be Squal of the serving cell.

[0009] In a possible design, before the measuring the cell corresponding to the second frequency point, the method further includes: adjusting a reselection priority of the second frequency point from a first priority to a second priority, where the second priority is higher than the reselection priority of the first frequency point.

[0010] In a possible design, the cell corresponding to the second frequency point includes a first cell, and the first cell belongs to the HSDN cell; and the reselecting to the cell corresponding to the second frequency point according to the measurement result of the cell corresponding to the second frequency point includes: reselecting to the first cell when a measurement result of the first cell satisfies a first reselection condition.

[0011] In a possible design, the reselection priority of the first cell is the second priority.

[0012] In a possible design, the cell corresponding to the second frequency point further includes a second cell, and the second cell does not belong to the HSDN cell; and the reselecting to the cell corresponding to the second frequency point according to the measurement result of the cell corresponding to the second frequency point includes: reselecting to the second cell when a measurement result of the second cell satisfies a second reselection condition, and when the measurement result of the first cell does not satisfy the first reselection condition.

[0013] In a possible design, the reselection priority of the second cell is the first priority.

[0014] In a possible design, the serving cell belongs to the HSDN cell, or the serving cell does not belong to the HSDN cell.

[0015] In one possible design, the second frequency point is a different frequency point or a different system frequency point of the first frequency point.

[0016] In one possible design, the method further includes: when it is detected that the terminal device is in a network-lost state, determining whether the moving state of the terminal device is a high-speed state based on the speed measured by a speed sensor in the terminal device.

[0017] When a terminal device is in a lost network state, if it reselects a cell, the number of cells reselected by the terminal device may not be updated in a timely manner, resulting in an inaccurate mobility state determined based on the number of cells reselected within a set time period. Therefore, the above-mentioned method of determining whether the mobility state of the terminal device is a high-speed state based on the speed measured by the speed sensor can effectively improve the accuracy of the determined mobility state.

[0018] In one possible design, whether the moving state of the terminal device is a high-speed state is determined based on the speed measured by the speed sensor in the terminal device, including: obtaining a filtered speed based on the speed measured by the speed sensor in the terminal device; if the filtered speed is greater than a speed threshold, determining that the moving state of the terminal device is a high-speed state.

[0019] In a second aspect, an embodiment of the present application provides a communication device, which may be a terminal device or a chip that can be disposed within a terminal device. The communication device has the functions of implementing the first aspect described above. For example, the communication device includes modules, units, or means corresponding to executing the steps involved in the first aspect described above. The functions, units, or means may be implemented through software or hardware, or may be implemented through hardware executing the corresponding software implementation.

[0020] In one possible design, the communication device includes a processing unit and a communication unit. The communication unit can be used to send and receive signals to enable communication between the communication device and other devices, for example, the communication unit is used to receive configuration information from an access network device; and the processing unit can be used to perform certain internal operations of the communication device. The functions performed by the processing unit and the communication unit can correspond to the operations described in the first aspect above.

[0021] In one possible design, the communication device includes a processor and may also include a transceiver, the transceiver being used to transmit and receive signals, and the processor uses the transceiver to perform the method in any possible design or implementation of the first aspect. The communication device may also include one or more memories, the memories being used to couple with the processor, and the memories being used to store computer programs or instructions that implement the functions involved in the first aspect. The processor may execute the computer programs or instructions stored in the memories, and when the computer programs or instructions are executed, the communication device implements the method in any possible design or implementation of the first aspect.

[0022] In one possible design, the communication device includes a processor, which may be coupled to a memory. The memory may store a computer program or instructions for implementing the functions of the first aspect. The processor may execute the computer program or instructions stored in the memory. When the computer program or instructions are executed, the communication device implements the method of any possible design or implementation of the first aspect.

[0023] In one possible design, the communication device includes a processor and an interface circuit, wherein the processor is used to communicate with other devices through the interface circuit and execute the method in any possible design or implementation of the first aspect above.

[0024] In a third aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer-readable instructions are stored. When a computer reads and executes the computer-readable instructions, the computer executes the method in any possible design of the first aspect above.

[0025] In a fourth aspect, an embodiment of the present application provides a computer program product. When a computer reads and executes the computer program product, the computer executes the method in any possible design of the first aspect above.

[0026] In a fifth aspect, an embodiment of the present application provides a chip, which includes a processor, and the processor is coupled to a memory, and is used to read and execute a software program stored in the memory to implement the method in any possible design of the first aspect above.

[0027] These and other aspects of the present application will become more readily apparent from the description of the following embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of a network architecture applicable to an embodiment of the present application;

[0029] Figure 2This is another network architecture diagram applicable to the embodiments of the present application;

[0030] Figure 3 This is another network architecture diagram applicable to the embodiments of the present application;

[0031] Figure 4 A schematic diagram of the rules for determining whether to start neighbor cell measurement according to an embodiment of the present application;

[0032] Figure 5 A flowchart corresponding to the wireless communication method provided in Example 1 of the present application;

[0033] Figure 6 A schematic diagram of the flow chart corresponding to the wireless communication method provided in Example 2 of the present application;

[0034] Figure 7 A possible exemplary block diagram of the apparatus involved in the embodiments of the present application;

[0035] Figure 8 A schematic diagram of the structure of a terminal device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0037] First, some of the terms used in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

[0038] (1) Terminal device: It can be a wireless terminal device that can receive access network device scheduling and instruction information. The wireless terminal device can be a device that provides voice and / or data connectivity to users, or a handheld device with wireless connection function, or other processing equipment connected to a wireless modem. The terminal device can communicate with one or more core networks or the Internet via a radio access network (RAN). The terminal device can be a mobile terminal device, such as a mobile phone (or "cellular" phone, mobile phone), a computer and a data card. For example, it can be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges voice and / or data with the radio access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), tablet computers (Pads), computers with wireless transceiver functions, and other devices. A wireless terminal device may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station (MS), a remote station (remotestation), an access point (AP), a remote terminal, an access terminal, a user terminal, a user agent, a subscriber station (SS), a customer premises equipment (CPE), a terminal, a user equipment (UE), a mobile terminal (MT), etc. A terminal device may also be a wearable device or a next-generation communication system, for example, a terminal device in a 5G communication system or a terminal device in a future-evolved public land mobile network (PLMN).

[0039] (2) Access network equipment: It can be a device in a wireless network. For example, the access network equipment can be a radio access network (RAN) node (or device) that connects a terminal device to a wireless network, which can also be called a base station. Currently, some examples of RAN equipment include: a new generation Node B (gNodeB) in a 5G communication system, a transmission reception point (TRP), an evolved Node B (eNB), a radio network controller (RNC), a Node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., home evolved Node B, or home Node B, HNB), a base band unit (BBU), or a wireless fidelity (Wi-Fi) access point (AP). In addition, in a network structure, the access network device may include a centralized unit (CU) node, a distributed unit (DU) node, or a RAN device including a CU node and a DU node. In addition, in other possible cases, the access network device may be other devices that provide wireless communication functions for terminal devices. The embodiments of the present application do not limit the specific technology and specific device form adopted by the access network device. For the convenience of description, in the embodiments of the present application, the device that provides wireless communication functions for the terminal device is referred to as an access network device.

[0040] (3) The terms "system" and "network" in the embodiments of the present application can be used interchangeably. "At least one" means one or more, and "more" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, "at least one of A, B and C" includes A, B, C, AB, AC, BC or ABC. In addition, unless otherwise specified, the ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, timing, priority or importance of multiple objects.

[0041] Figure 1 This is a schematic diagram of a network architecture applicable to the embodiment of this application. Figure 1 As shown, a terminal device can access a wireless network to obtain services from an external network (e.g., the Internet) through the wireless network, or communicate with other devices through the wireless network, such as other terminal devices. The wireless network includes a RAN and a core network (CN). The RAN is used to connect a terminal device (e.g., terminal device 130) to the wireless network, and the CN is used to manage the terminal device and provide a gateway for communication with the external network.

[0042] The RAN may include one or more RAN devices, such as RAN device 1101 and RAN device 1102.

[0043] The CN may include one or more CN devices, such as CN device 120. Figure 1 When the network architecture shown is applicable to a 5G communication system, the CN device 120 may include an access and mobility management function (AMF) entity, a session management function (SMF) entity, a user plane function (UPF) entity, and the like.

[0044] For the communication between the terminal device and the RAN device, according to the different transmission directions, the transmission link from the terminal device to the RAN device can be recorded as an uplink (uplink, UL), and the transmission link from the RAN device to the terminal device can be recorded as a downlink (downlink, DL). Similarly, data transmission in the uplink can be simply recorded as uplink data transmission or uplink transmission, and data transmission in the downlink can be simply recorded as downlink data transmission or downlink transmission. In this network architecture, the RAN device can provide communication coverage for a specific geographical area through integrated or external antenna equipment. One or more terminal devices within the communication coverage of the RAN device can access the RAN device. A RAN device can manage one or more cells, and each cell has an identification (identification), which is also called the cell identity (cell ID). From the perspective of wireless resources, a cell is a combination of downlink wireless resources and uplink wireless resources (optional) paired with it. When the terminal device is in a connected state, switching the RRC connection from the RAN device 1101 to the RAN device 1102 is cell switching; when the terminal device is in an idle state, applying from the resident RAN device 1101 to the resident RAN device 1102 is cell reselection.

[0045] Terminal devices and RAN devices should be aware of the predefined configurations of the network architecture, including the radio access technology (RAT) supported by the system and the wireless resource configuration specified by the system, such as the basic configuration of the radio frequency band and carrier. A carrier is a frequency range that complies with the system regulations. This frequency range can be determined by the center frequency of the carrier (also called the carrier frequency) and the bandwidth of the carrier. These system-predefined configurations can be part of the standard protocol of the wireless communication system, or determined through interaction between the terminal device and the RAN device. The content of the relevant standard protocols may be pre-stored in the memory of the terminal device and the RAN device, or embodied in the hardware circuit or software code of the terminal device and the RAN device.

[0046] It should be understood that Figure 1 The number of devices in the communication system shown is for illustration only, and the embodiments of the present application are not limited thereto. In actual applications, the communication system may further include more terminal devices, more RAN devices, and other devices.

[0047] Figure 2 This is another network architecture diagram applicable to the embodiment of this application. Figure 2As shown, the network architecture includes CN equipment, RAN equipment, and terminal equipment. The RAN equipment includes a baseband device and a radio frequency device, wherein the baseband device can be implemented by one node or multiple nodes, and the radio frequency device can be implemented independently from the baseband device or integrated into the baseband device, or some functions can be integrated independently and some functions can be integrated into the baseband device. For example, in an LTE communication system, the RAN equipment includes a baseband device and a radio frequency device, wherein the radio frequency device can be arranged remotely from the baseband device, for example, a remote radio unit (RRU) is a remote radio unit arranged relative to the BBU.

[0048] The communication between RAN equipment and terminal equipment follows a certain protocol layer structure. For example, the control plane protocol layer structure may include the functions of the radio resource control (RRC) layer, packet data convergence protocol (PDCP) layer, radio link control (RLC) layer, media access control (MAC) layer, and physical layer. The user plane protocol layer structure may include the functions of the PDCP layer, RLC layer, MAC layer, and physical layer. In one possible implementation, the service data adaptation protocol (SDAP) layer may also be included above the PDCP layer.

[0049] The RAN device can implement the functions of the protocol layers such as RRC, PDCP, RLC and MAC by one node, or can implement the functions of these protocol layers by multiple nodes. For example, in an evolutionary structure, the RAN device may include a CU) and a DU, and multiple DUs may be centrally controlled by one CU. Figure 2 As shown, CU and DU can be divided according to the protocol layers of the wireless network, for example, the functions of the PDCP layer and above protocol layers are set in CU, and the functions of the protocol layers below PDCP, such as the RLC layer and MAC layer, are set in DU.

[0050] The protocol layer division is only an example, and other protocol layer divisions are also possible, such as a division at the RLC layer, with the functions of the RLC layer and the protocol layers above the RLC layer being arranged in the CU, and the functions of the protocol layers below the RLC layer being arranged in the DU; or a division in a certain protocol layer, such as a division in which part of the functions of the RLC layer and the functions of the protocol layers above the RLC layer are arranged in the CU, and the remaining functions of the RLC layer and the functions of the protocol layers below the RLC layer are arranged in the DU. In addition, other divisions are also possible, such as a division by delay, with the functions that need to meet a delay requirement in terms of processing time being arranged in the DU, and the functions that do not need to meet the delay requirement being arranged in the CU.

[0051] In addition, the radio frequency device can be independently integrated, not placed in the DU, or integrated in the DU, or partially remote and partially integrated in the DU, without any limitation here.

[0052] Figure 3 Another network architecture applicable to the embodiments of the present application is shown in the figure. Relative to the network architecture shown in Figure 2 , Figure 3 In the network architecture shown in , the control plane (CP) and the user plane (UP) of the CU can also be separated and implemented by different entities, namely a control plane (control plane, CP) CU entity (CU-CP entity) and a user plane (user plane, UP) CU entity (CU-UP entity).

[0053] In the above network architecture, the signaling generated by the CU can be transmitted to the terminal device through the DU, or the signaling generated by the terminal device can be transmitted to the CU through the DU. The DU can not analyze the signaling and directly transmit it to the terminal device or the CU through protocol layer encapsulation. In the following embodiments, if the transmission of such signaling between the DU and the terminal device is involved, the transmission or reception of the signaling by the DU includes such a scenario. For example, the signaling of the RRC or PDCP layer will eventually be processed as the signaling of the PHY layer transmitted to the terminal device, or converted from the received PHY layer signaling. In this architecture, the signaling of the RRC or PDCP layer can also be considered as being transmitted by the DU, or transmitted by the DU and the radio frequency device.

[0054] Figure 1 , Figure 2 or Figure 3The network architecture shown can be applicable to various RAT communication systems, for example, it can be a 4G (or long term evolution (LTE)) communication system, it can also be a 5G (or new radio (NR)) communication system, it can also be a transition system between the LTE communication system and the 5G communication system, and the transition system can also be called a 4.5G communication system, and of course it can also be a future communication system. The network architecture and business scenarios described in the embodiments of the present application are for the purpose of more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. It is known to those skilled in the art that with the evolution of the communication network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems. The devices in the following embodiments of the present application can be located in terminal equipment or access network equipment according to the functions they implement.

[0055] The following is an explanation of the relevant technical features involved in the embodiments of the present application. It should be noted that these explanations are intended to make the embodiments of the present application easier to understand and should not be regarded as limiting the scope of protection claimed by the present application.

[0056] 1. Cell Reselection

[0057] When the terminal device is in the RRC idle state (RRC_IDLE), the terminal device can perform a cell search and determine whether the measurement results of the searched cells meet the S criterion for cell selection. Once a suitable cell is found, the terminal device can stop the cell search and reside on the suitable cell. Among them, the measurement results of the cell may include at least one of the following: reference signal receiving power (RSRP), reference signal receiving quality (RSRQ), signal to interference plus noise ratio (SINR), which are not specifically limited. Meeting the S criterion may mean: meeting Srxlev>0 and Squal>0. When the cell meets the S criterion, the terminal device can choose to reside in the cell.

[0058] Where Srxlev = Qrxlevmeas - (Qrxlevmin + Qrxlevminoffset) – Pcompensation

[0059] Squal=Qqualmeas-(Qqualmin+Qqualminoffset)

[0060] Qrxlevmeas: The received signal level value of the cell, such as RSRP.

[0061] Qrxlevmin: The minimum receiving level value of the cell.

[0062] Qrxlevminoffset: The minimum receive signal level offset value of the cell.

[0063] Pcompensation: The value is max (PMax-UE Maximum Output Power, 0).

[0064] PMax: The maximum transmission power of the terminal device allowed in the cell.

[0065] UE Maximum Output Power: The maximum RF output power capability of the terminal device itself.

[0066] Qqualmeas: The received signal quality of the cell, such as RSRQ.

[0067] Qqualmin: The minimum received signal quality value of the cell.

[0068] Qqualminoffset: The minimum received signal quality offset value of the cell.

[0069] When a terminal device resides in a cell, due to the mobility of the terminal device or the different fading of the cell edge channel, the reception quality of the signals from different access network devices to the terminal device may be different, which may cause the terminal device to reselect between different cells. For example, see Figure 1 In the network architecture shown, after the terminal device 130 resides in the cell under the access network device 1101 (the cell is the resident cell of the terminal device, or called the service cell) through the cell selection process, the terminal device 130 moves, for example, the terminal device 130 moves from the communication coverage range of the access network device 1101 to the communication coverage range of the access network device 1102. In this case, the reception quality of the signal received by the terminal device 130 from the access network device 1102 may be better than the reception quality of the signal received by the terminal device from the access network device 1101, which may cause the terminal device 130 to reselect from the cell of the access network device 1101 to the cell of the access network device 1102.

[0070] Exemplarily, the cell reselection process may include two phases, namely, a measurement initiation phase, a measurement result evaluation phase, and a cell reselection phase.

[0071] (1) Start the measurement phase

[0072] ①Cell reselection priority

[0073] The cell reselection priority is the parameter that the terminal device needs to consider first when performing cell reselection. The cell reselection priority can be configured by the network side, for example, it can be notified to the terminal device through the service cell broadcast (i.e., the system message of the service cell). The parameter corresponding to the cell reselection priority can be cellReselectionPriority, and the value range can be 0 to 7. The larger the value of this parameter, the higher the reselection priority of all cells on the corresponding frequency. It should be noted that the network side can be configured with the reselection priority of the frequency, and the reselection priority of the cell under the frequency is the reselection priority of the frequency. The reselection priorities of different frequencies can be the same or different.

[0074] In one example, the system information of the serving cell may include system information blocks (SIB) 3, SIB5, SIB6 to SIB8. SIB3 may include the reselection priority of the same-frequency point (i.e., the frequency point corresponding to the serving cell), SIB5 may include the reselection priority of the different-frequency points, and SIB6 to SIB8 may include the reselection priority of the different-system frequency points.

[0075] In addition to system messages, the cell reselection priority can also be communicated to the terminal device via the RRC connection release message. When the terminal device receives an RRC connection release message containing the cellReselectionPriority, the cell reselection priority configured in the message shall prevail, ignoring the reselection priority broadcasted in the system message of the serving cell. Alternatively, the cell reselection priority may be the reselection priority inherited from another RAT.

[0076] In an embodiment of the present application, the reselection priority broadcast in the system message of the serving cell may be referred to as the shared reselection priority, while the reselection priority transmitted in the RRC connection release message and inherited through other RATs may be referred to as the dedicated reselection priority. For a certain frequency point (or cell), when the terminal device does not receive the dedicated reselection priority, the shared reselection priority may be used as the current reselection priority of the frequency point; and when the terminal device receives the dedicated reselection priority, the dedicated reselection priority may be used as the current reselection priority of the frequency point, ignoring the shared reselection priority.

[0077] ②Start measurement rules

[0078] The terminal device can obtain the following parameters by receiving system messages from the serving cell: (1) SIntraSearchP: indicates the Srxlev threshold for intra-frequency measurement; (2) SIntraSearchQ: indicates the Squal threshold for intra-frequency measurement; (3) SnonIntraSearchP: indicates the Srxlev threshold for inter-frequency and inter-system measurements; (4) SnonIntraSearchQ: indicates the Squal threshold for inter-frequency and inter-system measurements. Among them, SIntraSearchP and SIntraSearchQ can be understood as the intra-frequency measurement start threshold, and SnonIntraSearchP and SnonIntraSearchQ can be understood as the non-intra-frequency (inter-frequency or inter-system) measurement start threshold.

[0079] After the terminal device successfully camps on the serving cell, it can measure the serving cell and obtain the serving cell measurement result. Furthermore, the terminal device can calculate the serving cell's Srxlev based on the serving cell measurement result and compare this value with the co-frequency / non-co-frequency measurement start threshold as a decision condition for whether to start neighbor cell measurement.

[0080] Figure 4 A schematic diagram of the rule for whether to start the neighboring cell measurement, such as Figure 4 Shown, including:

[0081] For an inter-frequency or inter-system frequency point whose reselection priority is higher than the reselection priority of the frequency point corresponding to the serving cell, the terminal device must always measure the inter-frequency or inter-system frequency point.

[0082] For frequencies whose reselection priority is equal to or lower than the reselection priority of the frequency corresponding to the serving cell, there are two cases: co-frequency and non-co-frequency. For co-frequency frequencies, when the serving cell's Srxlev>SIntraSearchP and Squal>SIntraSearchQ, the terminal device may not perform co-frequency measurement; otherwise, start co-frequency measurement. For non-co-frequency frequencies, when the serving cell's Srxlev>SnonIntraSearchP and Squal>SnonIntraSearchQ, the terminal device may not start the measurement of inter-frequency or inter-system frequencies with the same priority or lower priority; otherwise, start the measurement of inter-frequency or inter-system frequencies with the same priority or lower priority.

[0083] (2) Measurement result evaluation and cell reselection phase

[0084] The reselection algorithms for cells on frequencies with different reselection priorities differ significantly: the lower the reselection priority, the more stringent the reselection criteria, and the lower the chance that a terminal device will reselect to that cell. The following describes the reselection criteria for cells with different reselection priorities.

[0085] ①For the neighbor cell whose reselection priority is higher than the serving cell, if the Srxlev of the neighbor cell is greater than the first threshold value, and lasts for the first time duration, and the terminal device has been camped on the current serving cell for more than 1 second, the terminal device can trigger the procedure of reselecting to the neighbor cell.

[0086] That is, for the neighbor cell whose reselection priority is higher than the serving cell, the terminal device can reselect to the neighbor cell when the cell with high reselection priority meets the above reselection condition without considering the good or bad of the signal quality of the serving cell.

[0087] ②For the neighbor cell with the same priority (which can include other cells under the frequency point corresponding to the serving cell, or cells corresponding to the inter-frequency frequency point), the R criterion of cell reselection can be introduced. Among them, the R criterion means that the terminal device can calculate the R value of all cells meeting the S criterion, and sort them according to the R value size. The cell ranked first will be considered as the optimal cell.

[0088] Among them, the R value of the serving cell (denoted as Rs) and the R value of the neighbor cell (denoted as Rn) are defined as follows:

[0089] Rs = Qmeas,s + Qhyst

[0090] Rn = Qmeas,n - Qoffset

[0091] Qmeas,s: the RSRP of the serving cell measured by the terminal device.

[0092] Qhyst: the reselection hysteresis value of the serving cell.

[0093] Qmeas,n: the RSRP of the neighbor cell measured by the terminal device.

[0094] Qoffset: if the neighbor cell and the serving cell are the same frequency cell, the value is the cell level offset broadcast in the system message of the serving cell, and the default value is 0; if the neighbor cell and the serving cell are inter-frequency cells, the value is the sum of the cell level offset and the carrier frequency offset broadcast in the system message of the serving cell, and the default value is 0.

[0095] Specifically, for the neighbor cell whose reselection priority is equal to the serving cell, according to the R value calculation result, if the Rn of the neighbor cell (for example, the neighbor cell can be the neighbor cell ranked first) is greater than the Rs of the serving cell, and lasts for the first time duration, and the terminal device has been camped on the current serving cell for more than 1 second, the terminal device can trigger the procedure of reselecting to the neighbor cell.

[0096] ③ For the neighboring cell with a lower reselection priority than the serving cell, if there is no cell that meets the reselection conditions of the high-priority cell on the frequency of the high reselection priority, and at the same time, there is no cell that meets the reselection conditions of the same-priority cell on the frequency corresponding to the serving cell or other different-frequency points with the same reselection priority, and at the same time, the Srxlev of the serving cell is less than the second threshold, and the Srxlev of the neighboring cell is greater than the third threshold and lasts for the second time period, and the terminal device has been stationed in the current serving cell for more than 1 second, then the terminal device can trigger the process of reselecting to the neighboring cell.

[0097] 2. HSDN Cell

[0098] Since high-speed mobile devices have become a common application scenario, operators can deploy HSDN cells to improve user experience. When the terminal device is in high-speed state, HSDN cells can provide better service to the terminal device than non-HSDN cells.

[0099] Exemplarily, the coverage of an access network device may include multiple cells, and the multiple cells may all be HSDN cells, or the multiple cells may all be non-HSDN cells, or the multiple cells may include HSDN cells and non-HSDN cells.

[0100] Exemplarily, the same frequency point may correspond to multiple cells, and the multiple cells may all be HSDN cells, or the multiple cells may all be non-HSDN cells, or the multiple cells may include HSDN cells and non-HSDN cells.

[0101] As described above regarding cell reselection, when the terminal device's serving cell's Srxlev > SnonIntraSearchP and Squal > SnonIntraSearchQ, the terminal device will not initiate measurements of inter-frequency or inter-system frequencies of equal or lower priority. However, if an inter-frequency or inter-system frequency of equal or lower priority corresponds to an HSDN cell, the terminal device will be unable to reselect to the HSDN cell when its mobility is high-speed, impacting the user experience.

[0102] Based on this, an embodiment of the present application provides a communication method for achieving reselection to an HSDN cell when the mobility state of a terminal device is a high-speed state.

[0103] The following describes the process of the communication method provided in the embodiment of the present application in conjunction with Example 1.

[0104] Example One

[0105] Figure 5This is a flow chart corresponding to the wireless communication method provided in Example 1 of the present application, such as Figure 5 As shown, the method includes:

[0106] S501: The access network device sends reselection configuration information to the terminal device in the serving cell of the terminal device.

[0107] Here, the serving cell may be a HSDN cell or may not be a HSDN cell.

[0108] Exemplarily, the access network device may send reselection configuration information through a system message (such as SIB3, SIB5, SIB6 to SIB8). The reselection configuration information may include a first frequency corresponding to the serving cell, a second frequency corresponding to the neighboring cell of the serving cell, and first indication information, where the first indication information is used to indicate that the cell corresponding to the second frequency includes an HSDN cell. Optionally, the reselection configuration information may also include second indication information, where the second indication information is used to indicate the conditions for measuring the cell corresponding to the second frequency. It is understandable that the reselection configuration information may also include other possible information, such as other possible frequencies corresponding to the neighboring cells of the serving cell, which are not specifically limited. Among them, the second frequency may be a different frequency or a different system frequency from the first frequency.

[0109] As a possible implementation, SIB3 may include the first frequency and the shared reselection priority corresponding to the first frequency; one of SIBs SIB5, SIB6, to SIB8 may include the second frequency and the shared reselection priority corresponding to the second frequency. Furthermore, the SIB may also include second indication information. In one example, the second indication information may include an identifier of the HSDN cell corresponding to the second frequency; or the second indication information may include a range to which the identifier of the HSDN cell corresponding to the second frequency belongs. The identifier of the HSDN cell may be a physical cell identity (PCI).

[0110] Accordingly, in S502, the terminal device may receive reselection configuration information from the serving cell.

[0111] S503: The terminal device obtains a reselection priority of the first frequency point and a reselection priority of the second frequency point, where the reselection priority of the second frequency point is lower than or equal to the reselection priority of the first frequency point.

[0112] Here, for the first frequency point, if the terminal device does not obtain the exclusive reselection priority of the first frequency point, the shared reselection priority of the first frequency point can be used as the reselection priority of the first frequency point; if the terminal device obtains the exclusive reselection priority of the first frequency point, the exclusive reselection priority of the first frequency point can be used as the reselection priority of the first frequency point, ignoring the shared priority of the first frequency point. For the second frequency point, if the terminal device does not obtain the exclusive reselection priority of the second frequency point, the shared reselection priority of the second frequency point can be used as the reselection priority of the second frequency point; if the terminal device obtains the exclusive reselection priority of the second frequency point, the exclusive reselection priority of the second frequency point can be used as the reselection priority of the second frequency point, ignoring the shared priority of the second frequency point.

[0113] When the reselection priority of the second frequency point is lower than or equal to the reselection priority of the first frequency point, the condition for measuring the cell corresponding to the second frequency point may include: the first signal quality indicator value corresponding to the measurement result of the serving cell is greater than the first threshold, and the second signal quality indicator value corresponding to the measurement result of the serving cell is greater than the second threshold. Exemplarily, the first signal quality indicator value corresponding to the measurement result of the serving cell may be Srxlev of the serving cell, the second signal quality indicator value corresponding to the measurement result of the serving cell may be Squal, the first threshold may be SnonIntraSearchP, and the second threshold may be SnonIntraSearchQ. If the first signal quality indicator value corresponding to the measurement result of the serving cell is greater than the first threshold, and the second signal quality indicator value corresponding to the measurement result of the serving cell is greater than the second threshold, then: Srxlev of the serving cell > SnonIntraSearchP and Squal > SnonIntraSearchQ. In this case, the first indication information may include the first threshold (i.e., SnonIntraSearchP) and the second threshold (i.e., SnonIntraSearchQ).

[0114] S504: The terminal device obtains the measurement result of the serving cell.

[0115] Exemplarily, the terminal device (such as the physical layer of the terminal device) can receive a downlink signal from a serving cell (such as a synchronization signal and a physical broadcast channel block (PBCH block) (referred to as SSB) or other possible pilot signals), and then measure and obtain the measurement result of the serving cell.

[0116] S505: When the measurement result of the serving cell does not meet the condition for measuring the cell corresponding to the second frequency point, but the mobile state of the terminal device is a high-speed state, measure the cell corresponding to the second frequency point.

[0117] 1. Introduce a method for determining the mobility status of a terminal device.

[0118] In an embodiment of the present application, there are multiple ways for a terminal device to determine its mobility state. In one possible implementation, the terminal device can detect the network service state of the terminal device, which may include a lost network state or a non-lost network state; and then, the mobility state is determined based on the network service state. The lost network state may refer to a state in which the measurement result of the service cell of the terminal device is less than a third threshold and the duration is greater than or equal to the third duration. The third threshold may be pre-defined by the protocol and is not specifically limited.

[0119] Exemplarily, determining the mobile state based on the network service state may refer to: (1) when the network service state is a lost network state, the terminal device may obtain the speed detected by the speed sensor of the terminal device and filter the speed to obtain a filtered speed; if the filtered speed is greater than or equal to the speed threshold, the mobile state of the terminal device is determined to be a high-speed state, and if the filtered speed is less than the speed threshold, the mobile state of the terminal device is determined to be a non-high-speed state. In an embodiment of the present application, the terminal device may include an application processor and a communication processor (such as a modem), and a speed sensor may be provided on the application processor, and the communication processor may be used to detect the network service state of the terminal device. When the communication processor detects that the network service state of the terminal device is a lost network state, the terminal device may determine the mobile state of the terminal device based on the speed detected by the speed sensor on the application processor.

[0120] There are many specific filtering methods. For example, the speed after filtering can be determined by the following formula:

[0121] F n =(1-a)*F n-1 +a*S n

[0122] Among them, F n is the filtered velocity, F n-1 is the filtered speed obtained in the last calculation, a is the filter coefficient, S n The speed detected by the speed sensor.

[0123] (2) When the network service status is a non-lost network status, the terminal device can determine the mobility status of the terminal device based on the number of cells reselected within the set time and the number threshold. For example, if the number of cells reselected by the terminal device within the set time is greater than or equal to the number threshold, the mobility status of the terminal device is determined to be a high-speed state. If the number of cells reselected by the terminal device within the set time is less than the number threshold, the mobility status of the terminal device is determined to be a non-high-speed state. The length of the set time and the number threshold can be obtained by the terminal device from the system message of the serving cell. For example, the terminal device can obtain the following parameters from the system message of the serving cell: T CRmax ,N CR_H and cellEquivalentSize, where T CRmax Indicates the evaluation time for the number of reselected cells (i.e. the length of the set time); N CR_H Indicates the number threshold corresponding to the high-speed mobility state of the terminal device; cellEquivalentSize indicates the number of reselected cells added when the terminal device reselects to an HSDN cell.

[0124] By adopting the above method, the terminal device can detect the network service status, and then use different methods to determine the mobility status of the terminal device according to different network service statuses, thereby improving the accuracy of the determined mobility status. For example, if the network service status of the terminal device is not taken into consideration, and the mobility status of the terminal device is determined based on the number of cells reselected within a set time and the number threshold, then when the terminal device is in a network-lost state, if the terminal device reselects a cell, it may result in the inability to update the number of cells reselected by the terminal device in a timely manner, thereby causing the mobility status determined based on the number of cells reselected within the set time to be inaccurate.

[0125] 2. Introducing the measurement of the cell corresponding to the second frequency point by the terminal device.

[0126] In an embodiment of the present application, during the measurement startup phase, the terminal device can determine whether the measurement result of the serving cell satisfies the conditions for measuring the cell corresponding to the second frequency point, and determine the mobility state of the terminal device. When the measurement result of the serving cell does not meet the conditions for measuring the cell corresponding to the second frequency point, but the mobility state of the terminal device is a high-speed state, the terminal device can adjust the reselection priority of the second frequency point from the first priority to the second priority, and the second priority is higher than the reselection priority of the first frequency point. For example, the second priority can be the highest priority (i.e., the value of cellReselectionPriority is 8). In this case, the adjusted reselection priority of the second frequency point is higher than the reselection priority of the first frequency point, and the terminal device can measure the cell corresponding to the second frequency point. In addition, when the measurement result of the serving cell does not meet the conditions for measuring the cell corresponding to the second frequency point, and the mobility state of the terminal device is a non-high-speed state, the terminal device may not measure the cell corresponding to the second frequency point.

[0127] The terminal device measuring the cell corresponding to the second frequency point may refer to the terminal device receiving a downlink signal from the cell corresponding to the second frequency point, measuring the downlink signal, and obtaining a measurement result of the cell corresponding to the second frequency point. The downlink signal here may be an SSB or other possible pilot signal. Exemplarily, the physical layer of the terminal device may perform the measurement of the cell corresponding to the second frequency point, thereby obtaining the measurement result of the cell corresponding to the second frequency point.

[0128] It should be noted that, in the above, after the terminal device determines that the reselection priority of the second frequency point is lower than or equal to the reselection priority of the first frequency point, and the cell corresponding to the second frequency point includes an HSDN cell, when the measurement result of the serving cell does not meet the conditions for measuring the cell corresponding to the second frequency point, but the mobile state of the terminal device is a high-speed state, then the measurement of the cell corresponding to the second frequency point can be started. In other possible embodiments, after the terminal device determines that the reselection priority of the second frequency point is lower than or equal to the reselection priority of the first frequency point, and the cell corresponding to the second frequency point includes an HSDN cell, if the mobile state of the terminal device is a high-speed state, then the measurement of the cell corresponding to the second frequency point can be started; that is, the terminal device may also not consider the measurement result of the serving cell, that is, regardless of whether the measurement result of the serving cell meets the conditions for measuring the cell corresponding to the second frequency point, the terminal device can start measuring the cell corresponding to the second frequency point.

[0129] S506: The terminal device reselects the cell corresponding to the second frequency point based on the measurement result of the cell corresponding to the second frequency point.

[0130] Exemplarily, after the physical layer of the terminal device obtains the measurement result of the cell corresponding to the second frequency point, the terminal device can send the measurement result to the RRC layer, and then the RRC layer can reselect to the cell corresponding to the second frequency point according to the measurement result of the cell corresponding to the second frequency point.

[0131] In the embodiments of the present application, the cell corresponding to the second frequency point can include one or more cells, and the following will be introduced by taking an example that the cell corresponding to the second frequency point includes a first cell and a second cell.

[0132] In the measurement result evaluation and cell reselection stage, when the moving state of the terminal device is a high-speed state, for the first cell under the second frequency point, the terminal device can determine whether the first cell belongs to the HSDN cell according to the second indication information, and if the first cell belongs to the HSDN cell, the terminal device can determine the reselection priority of the first cell according to the adjusted reselection priority of the second frequency point, for example, the reselection priority of the first cell can be the second priority. Then, whether the measurement result of the first cell meets the first reselection condition can be determined according to the reselection priority of the first cell, and if yes, the terminal device can reselect to the first cell. Wherein, the measurement result of the first cell meeting the first reselection condition can include that the Srxlev of the first cell is greater than the first threshold value and lasts for a first time length. Exemplarily, the terminal device can refer to the implementation described in the foregoing for the neighbor cell with a reselection priority higher than the serving cell to determine whether to reselect to the first cell.

[0133] In addition, for the second cell under the second frequency point, the terminal device can determine whether the second cell belongs to the HSDN cell according to the second indication information, and if the second cell does not belong to the HSDN cell, the terminal device can determine the reselection priority of the second cell according to the reselection priority of the second frequency point before adjustment, for example, the reselection priority of the second cell can be the first priority. Then, whether the measurement result of the second cell meets the second reselection condition can be determined according to the reselection priority of the second cell, and if the measurement result of the first cell does not meet the first reselection condition, if the measurement result of the second cell meets the second reselection condition, the terminal device can reselect to the second cell. Exemplarily, if the first priority is the same as the reselection priority of the first frequency point, the measurement result of the second cell meeting the second reselection condition can include that the R value of the second cell is greater than the R value of the serving cell and lasts for a first time length. In this case, the terminal device can refer to the implementation described in the foregoing for the neighbor cell with the same priority to determine whether to reselect to the second cell. If the first priority is lower than the reselection priority of the first frequency point, the measurement result of the second cell meeting the second reselection condition can include that the Srxlev is greater than a third threshold and lasts for a second time length. In this case, the terminal device can refer to the implementation described in the foregoing for the neighbor cell with a reselection priority lower than the serving cell to determine whether to reselect to the second cell.

[0134] It should be noted that: in one example, during the measurement result evaluation and cell reselection stage, the terminal device can directly use the mobile state determined by the terminal device during the measurement startup stage. For example, if the terminal device determines that the mobile state is a high-speed state during the measurement startup stage, then during the measurement result evaluation and cell reselection stage, the terminal device can directly default the mobile state to a high-speed state.

[0135] In another example, considering that there is a certain time difference between the measurement startup phase and the measurement result evaluation and cell reselection phase, the mobility state of the terminal device may change. In order to ensure the accuracy of the mobility state of the terminal device, the terminal device may again use the above method to determine the mobility state of the terminal device during the measurement result evaluation and cell reselection phase; that is, during the cell reselection process, the terminal device may determine the current mobility state during the measurement startup phase, and determine the current mobility state again during the measurement result evaluation and cell reselection phase, thereby ensuring the accuracy of the mobility state.

[0136] For example, in the measurement startup phase, it is determined that the mobile state of the terminal device is a high-speed state, and in the measurement result evaluation and cell reselection phase, it is determined that the mobile state of the terminal device is a non-high-speed state. In this case, for the first cell under the second frequency point, the terminal device can determine whether the first cell belongs to an HSDN cell based on the second indication information. If the first cell belongs to an HSDN cell, the terminal device can determine that the reselection priority of the first cell is the third priority, which is lower than the priority of the first frequency point. Optionally, the third priority can be the lowest priority (that is, the value of cellReselectionPriority is 0). In this case, the terminal can refer to the implementation described above for the neighboring cell with a lower reselection priority than the serving cell to determine whether to reselect to the first cell.

[0137] In addition, for the second cell under the second frequency point, the terminal device can determine whether the second cell belongs to an HSDN cell based on the second indication information. If the second cell does not belong to an HSDN cell, the terminal device can determine the reselection priority of the second cell based on the reselection priority of the second frequency point before adjustment. For example, it can be determined that the reselection priority of the second cell can be the first priority. The relevant implementation of whether to reselect to the second cell subsequently can be found above.

[0138] It can be understood that the above embodiment 1 is described using the second frequency point as an example. The frequency points corresponding to the neighboring cells of the service cell of the terminal device may also include other possible frequency points, such as the third frequency point. If the cell corresponding to the third frequency point also includes an HSDN cell, the terminal device may also use the above method to measure the cell corresponding to the third frequency point, and then perform cell reselection based on the measurement results and reselection priorities of each cell (such as the cell corresponding to the second frequency point and the third frequency point) measured by the terminal device. For another example, the frequency points corresponding to the neighboring cells of the service cell of the terminal device may also include a fourth frequency point. If the reselection priority of the fourth frequency point is greater than the reselection priority of the first frequency point, the terminal device may measure the cell corresponding to the fourth frequency point (for specific implementation, please refer to the prior art), and then perform cell reselection based on the measurement results and reselection priorities of each cell (such as the cell corresponding to the second frequency point and the fourth frequency point) measured by the terminal device.

[0139] Using the above method, if there is an HSDN cell corresponding to the heterofrequency or heterosystem frequency point of the same priority or lower priority, then when the measurement result of the service cell does not meet the conditions for measuring the heterofrequency or heterosystem frequency point of the same priority or lower priority, but the mobile state of the terminal device is in a high-speed state, the heterofrequency or heterosystem frequency point of the same priority or lower priority can still be measured, thereby facilitating the terminal device to reselect the HSDN cell corresponding to the heterofrequency or heterosystem frequency point of the same priority or lower priority, thereby improving the user experience.

[0140] According to the description of cell reselection above, when the terminal device's serving cell's Srxlev > SIntraSearchP and Squal > SIntraSearchQ, the terminal device can avoid performing intra-frequency measurements, that is, it does not measure intra-frequency neighboring cells. However, if the serving cell's corresponding frequency includes an HSDN cell, when the terminal device's mobility state is high-speed, the terminal device will not be able to reselect to the HSDN cell, affecting the user experience.

[0141] Based on this, an embodiment of the present application provides a communication method for achieving reselection to an HSDN cell when the mobility state of a terminal device is a high-speed state.

[0142] The following describes the process of the communication method provided in the embodiment of the present application in conjunction with Example 2.

[0143] Example Two

[0144] Figure 6 This is a flow chart corresponding to the wireless communication method provided in Example 2 of the present application, such as Figure 6 As shown, the method includes:

[0145] S601: The access network device sends reselection configuration information to the terminal device in the serving cell of the terminal device.

[0146] Here, the serving cell may be a HSDN cell or may not be a HSDN cell.

[0147] Exemplarily, the access network device may send reselection configuration information through a system message (such as SIB3, SIB5, SIB6 to SIB8). The reselection configuration information may include a first frequency corresponding to the serving cell, third indication information, and fourth indication information, where the third indication information is used to indicate a condition for measuring a co-frequency neighboring cell, and the fourth indication information is used to indicate that the cell corresponding to the first frequency includes an HSDN cell.

[0148] As a possible implementation, the third indication information may be carried in SIB3, and the third indication information may include the identifier of the HSDN cell corresponding to the first frequency; or, the third indication information may include the range to which the identifier of the HSDN cell corresponding to the first frequency belongs.

[0149] It should be noted that if the serving cell is an HSDN cell and the co-frequency neighboring cells of the serving cell include HSDN cells, the subsequent steps in Example 2 can be performed. If the HSDN cell corresponding to the first frequency point only includes the serving cell, that is, the co-frequency neighboring cells of the serving cell do not include HSDN cells, then the subsequent implementation can refer to the existing technology.

[0150] Accordingly, in S602, the terminal device may receive reselection configuration information from the serving cell.

[0151] S603, the terminal device obtains the measurement result of the serving cell.

[0152] S604: When the measurement result of the serving cell does not meet the conditions for measuring the same-frequency neighboring cell, but the mobile state of the terminal device is high-speed, measure the same-frequency neighboring cell.

[0153] Here, the manner in which the terminal device determines the mobile status may refer to the above-mentioned embodiment 1.

[0154] In the embodiment of the present application, in the starting measurement stage, the terminal device can determine whether the measurement result of the serving cell meets the condition of measuring the same-frequency neighbor cell and determine the moving state of the terminal device. When the measurement result of the serving cell does not meet the condition of measuring the same-frequency neighbor cell, but the moving state of the terminal device is the high-speed state, the terminal device starts to measure the same-frequency neighbor cell. Here, it is different from the terminal device adjusting the reselection priority of the second frequency point to start to measure the cell corresponding to the second frequency point in the first embodiment described above. In the second embodiment, the terminal device can not need to adjust the reselection priority of the first frequency point. In addition, when the measurement result of the serving cell does not meet the condition of measuring the same-frequency neighbor cell, and the moving state of the terminal device is the non-high-speed state, the terminal device can not measure the same-frequency neighbor cell.

[0155] It should be noted that in the above, after the terminal device determines that the same-frequency neighbor cell of the serving cell includes the HSDN cell, when the measurement result of the serving cell does not meet the condition of measuring the same-frequency neighbor cell, but the moving state of the terminal device is the high-speed state, the same-frequency neighbor cell can be measured. In other possible embodiments, after the terminal device determines that the same-frequency neighbor cell of the serving cell includes the HSDN cell, if the moving state of the terminal device is the high-speed state, the same-frequency neighbor cell can be measured; that is, the terminal device can also not consider the measurement result of the serving cell, that is, regardless of whether the measurement result of the serving cell meets the condition of measuring the same-frequency neighbor cell, the terminal device can start to measure the same-frequency neighbor cell.

[0156] S605, the terminal device reselects to the same-frequency neighbor cell according to the measurement result of the same-frequency neighbor cell.

[0157] In the embodiment of the present application, the same-frequency neighbor cell can include one or more cells, and the following is described by taking that the same-frequency neighbor cell includes a third cell and a fourth cell as an example.

[0158] In the measurement result evaluation and cell reselection stage, when the moving state of the terminal device is the high-speed state, for the third cell, the terminal device can determine whether the third cell belongs to the HSDN cell according to the fourth indication information, if the third cell belongs to the HSDN cell, the terminal device can determine whether the measurement result of the third cell meets the reselection condition, if yes, the terminal device can reselect to the third cell. In addition, for the fourth cell, the terminal device can determine whether the fourth cell belongs to the HSDN cell according to the fourth indication information, if the fourth cell does not belong to the HSDN cell, the terminal device can determine whether the measurement result of the fourth cell meets the reselection condition, if yes, the terminal device can reselect to the fourth cell. Exemplarily, the terminal device can refer to the implementation of the same-priority neighbor cell described above to determine whether to reselect to the third cell or the fourth cell.

[0159] As a possible implementation, since the third cell belongs to an HSDN cell and the fourth cell does not belong to an HSDN cell, the terminal device can first determine whether the third cell meets the reselection conditions. When the third cell meets the reselection conditions, the terminal device can preferentially reselect to the third cell; if the third cell does not meet the reselection conditions, it can further determine whether the fourth cell meets the reselection conditions. If the fourth cell meets the reselection conditions, the terminal device can reselect to the fourth cell.

[0160] It should be noted that, in one example, during the measurement result evaluation and cell reselection phases, the terminal device may directly use the mobility state determined by the terminal device during the measurement startup phase.

[0161] In another example, during the measurement result evaluation and cell reselection phase, the terminal device may again use the above-mentioned method to determine the mobile state of the terminal device. For example, during the measurement startup phase, the mobile state of the terminal device is determined to be a high-speed state, while during the measurement result evaluation and cell reselection phase, the mobile state of the terminal device is determined to be a non-high-speed state. In this case, for the third cell, the terminal device may determine whether the third cell belongs to an HSDN cell based on the fourth indication information. If the third cell belongs to an HSDN cell, the terminal device may determine whether the measurement result of the third cell meets the reselection condition. If so, the terminal device may reselect to the third cell. Also, for the fourth cell, the terminal device may determine whether the fourth cell belongs to an HSDN cell based on the fourth indication information. If the fourth cell does not belong to an HSDN cell, the terminal device may determine whether the measurement result of the fourth cell meets the reselection condition. If so, the terminal device may reselect to the fourth cell. Exemplarily, the terminal device may refer to the implementation of the neighboring cells of the same priority as described above to determine whether to reselect to the third cell or the fourth cell.

[0162] For this situation, as a possible implementation, since the third cell belongs to the HSDN cell and the fourth cell does not belong to the HSDN cell, the terminal device can first determine whether the fourth cell meets the reselection conditions. When the fourth cell meets the reselection conditions, the terminal device can prioritize reselecting to the fourth cell; if the fourth cell does not meet the reselection conditions, it can further determine whether the third cell meets the reselection conditions. If the third cell meets the reselection conditions, the terminal device can reselect to the third cell.

[0163] Using the above method, if the co-frequency neighboring cells include HSDN cells, when the measurement results of the serving cell do not meet the conditions for measuring the co-frequency neighboring cells, but the mobile state of the terminal device is in a high-speed state, the co-frequency neighboring cells can still be measured, thereby facilitating the terminal device to reselect the HSDN cell in the co-frequency neighboring cells and improving the user experience.

[0164] Regarding the above-mentioned embodiment 1 and embodiment 2, it should be noted that:

[0165] (1) The above-mentioned embodiment 1 and embodiment 2 can be implemented separately or in combination, and there is no specific limitation. For example, in a scenario where the service cell of the terminal device has an HSDN cell corresponding to a different frequency or a different system frequency with the same priority or a lower priority, and the same-frequency neighboring cell of the service cell includes an HSDN cell, the embodiment 1 and embodiment 2 can be implemented in combination; in this case, the terminal device may reselect to the HSDN cell in the same-frequency neighboring cell, or may reselect to the HSDN cell corresponding to the different frequency or a different system frequency with the same priority or a lower priority, which may depend on the implementation of the terminal device, and the embodiments of this application do not limit this.

[0166] (2) The above description focuses on the differences between the first embodiment and the second embodiment. Except for the differences, the first embodiment and the second embodiment can refer to each other.

[0167] (3) The step numbers in the flowcharts described in Examples 1 and 2 are merely examples of the execution process and do not limit the order in which the steps are executed. In the embodiments of this application, there is no strict execution order for steps that have no temporal dependencies. Furthermore, not all steps shown in the flowcharts are mandatory, and steps may be added or deleted based on actual needs.

[0168] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of the interaction between the access network device and the terminal device. It can be understood that in order to realize the above functions, the terminal device may include a hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in a hardware or computer software driven hardware manner depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0169] In the embodiments of the present application, the terminal device can be divided into functional units according to the above method examples. For example, each functional unit can be divided according to each function, or two or more functions can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or software functional units.

[0170] In the case of an integrated unit, Figure 7 A possible exemplary block diagram of the device involved in the embodiments of the present application is shown.Figure 7 As shown, the apparatus 700 can include a processing unit 702 and a communication unit 703. The processing unit 702 is configured to control and manage actions of the apparatus 700. The communication unit 703 is configured to support communication of the apparatus 700 with other devices. Optionally, the communication unit 703, also referred to as a transceiver unit, can include a receiving unit and / or a transmitting unit, which are configured to perform receiving and transmitting operations, respectively. The apparatus 700 can further include a storage unit 701 configured to store program codes and / or data of the apparatus 700.

[0171] The apparatus 700 can be a terminal device in the above-described embodiments, or can also be a chip disposed in a terminal device. The processing unit 702 can support the apparatus 700 to perform actions of a terminal device in the above-described method examples. Alternatively, the processing unit 702 mainly performs internal actions of a terminal device in the method examples, and the communication unit 703 can support communication between the apparatus 700 and other devices.

[0172] Specifically, in one embodiment, the communication unit 703 is configured to receive reselection configuration information from a serving cell, the reselection configuration information including a first frequency point corresponding to the serving cell, a second frequency point corresponding to a neighbor cell of the serving cell, and first indication information, the first indication information being used to indicate that a cell corresponding to the second frequency point includes a high-speed dedicated network (HSDN) cell; wherein a reselection priority of the second frequency point is lower than or equal to a reselection priority of the first frequency point; the processing unit 702 is configured to, when a mobile state of the terminal device is a high-speed state, perform measurement on the cell corresponding to the second frequency point; and reselect to the cell corresponding to the second frequency point according to a measurement result of the cell corresponding to the second frequency point.

[0173] In a possible design, the reselection configuration information further includes second indication information, the second indication information being used to indicate a condition for performing measurement on the cell corresponding to the second frequency point; and the processing unit 702 is specifically configured to obtain a measurement result of the serving cell; and perform measurement on the cell corresponding to the second frequency point when the mobile state of the terminal device is the high-speed state, if the measurement result of the serving cell does not satisfy the condition for performing measurement on the cell corresponding to the second frequency point.

[0174] In a possible design, the condition for performing measurement on the cell corresponding to the second frequency point, when the measurement result of the serving cell does not satisfy the condition, includes: a first signal quality index value corresponding to the measurement result of the serving cell is greater than a first threshold value, and a second signal quality index value corresponding to the measurement result of the serving cell is greater than a second threshold value.

[0175] In one possible design, the processing unit 702 is further used to adjust the reselection priority of the second frequency point from a first priority to a second priority, where the second priority is higher than the reselection priority of the first frequency point.

[0176] In one possible design, the cell corresponding to the second frequency point includes a first cell, and the first cell belongs to the HSDN cell; the processing unit 702 is specifically used to reselect the first cell if the measurement result of the first cell meets the first reselection condition.

[0177] In one possible design, the cell corresponding to the second frequency point also includes a second cell, which does not belong to the HSDN cell; the processing unit 702 is specifically used to, when the measurement result of the first cell does not meet the first reselection condition, reselect to the second cell if the measurement result of the second cell meets the second reselection condition.

[0178] In one possible design, the serving cell belongs to a HSDN cell, or the serving cell does not belong to a HSDN cell.

[0179] In one possible design, the second frequency point is a different frequency point or a different system frequency point of the first frequency point.

[0180] In one possible design, the processing unit 702 is further used to determine whether the moving state of the terminal device is a high-speed state based on the speed measured by the speed sensor in the terminal device when it is detected that the terminal device is in a lost network state.

[0181] In one possible design, the processing unit 702 is specifically used to obtain a filtered speed based on the speed measured by the speed sensor in the terminal device; if the filtered speed is greater than a speed threshold, it is determined that the moving state of the terminal device is a high-speed state.

[0182] It should be understood that the division of units in the above device is merely a division of logical functions. In actual implementation, they can be fully or partially integrated into one physical entity, or they can be physically separated. Moreover, the units in the device can all be implemented in the form of software calling through processing elements; or they can all be implemented in the form of hardware; or some units can be implemented in the form of software calling through processing elements, and some units can be implemented in the form of hardware. For example, each unit can be a separately established processing element, or it can be integrated into a certain chip of the device. In addition, it can also be stored in the memory in the form of a program, called by a certain processing element of the device and execute the function of the unit. In addition, all or part of these units can be integrated together, or they can be implemented independently. The processing element described here can also be a processor, which can be an integrated circuit with signal processing capabilities. In the implementation process, each operation of the above method or each unit above can be implemented by the integrated logic circuit of the hardware in the processor element or in the form of software calling through the processing element.

[0183] In one example, the unit in any of the above devices may be one or more integrated circuits configured to implement the above method, such as one or more application specific integrated circuits (ASICs), or one or more digital singnal processors (DSPs), or one or more field programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms. For another example, when the unit in the device can be implemented in the form of a processing element scheduler, the processing element can be a processor, such as a general-purpose central processing unit (CPU), or other processor that can call a program. For another example, these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0184] The above-mentioned receiving unit is an interface circuit of the device, which is used to receive signals from other devices. For example, when the device is implemented as a chip, the receiving unit is the interface circuit of the chip used to receive signals from other chips or devices. The above-mentioned sending unit is an interface circuit of the device, which is used to send signals to other devices. For example, when the device is implemented as a chip, the sending unit is the interface circuit of the chip used to send signals to other chips or devices.

[0185] Figure 8This is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application, which may be the terminal device in the above embodiment, and is used to implement the operations of the terminal device in the above embodiment. Figure 8 As shown, the terminal device includes an antenna 810, a radio frequency section 820, and a signal processing section 830. Antenna 810 is connected to radio frequency section 820. In the downlink direction, radio frequency section 820 receives information sent by network devices via antenna 810 and sends the information to signal processing section 830 for processing. In the uplink direction, signal processing section 830 processes the information from the terminal device and sends it to radio frequency section 820. Radio frequency section 820 then processes the information from the terminal device and sends it to the network device via antenna 810.

[0186] The signal processing unit 830 may include a modem subsystem for processing data at various communication protocol layers; a central processing unit for processing the terminal device's operating system and application layers; and other subsystems, such as a multimedia subsystem for controlling the terminal device's camera and screen display, and a peripheral subsystem for connecting to other devices. The modem subsystem may be a separate chip.

[0187] The modem subsystem may include one or more processing elements 831, such as a main control CPU and other integrated circuits. Furthermore, the modem subsystem may include a storage element 832 and an interface circuit 833. Storage element 832 is used to store data and programs. However, the program used to execute the method performed by the terminal device in the above method may not be stored in storage element 832, but rather in a memory external to the modem subsystem, and loaded by the modem subsystem when in use. Interface circuit 833 is used to communicate with other subsystems.

[0188] The modem subsystem can be implemented using a chip comprising at least one processing element and an interface circuit, wherein the processing element is configured to execute each step of any of the methods performed by the terminal device described above, and the interface circuit is configured to communicate with other devices. In one implementation, the unit for implementing each step of the method described above can be implemented as a processing element scheduler. For example, the terminal device may include a processing element and a storage element, with the processing element invoking a program stored in the storage element to execute the method performed by the terminal device in the above method embodiments. The storage element can be a storage element located on the same chip as the processing element, i.e., an on-chip storage element.

[0189] In another implementation, the program for executing the method executed by the terminal device in the above method can be stored in a memory element on a different chip from the processing element, i.e., an off-chip memory element. In this case, the processing element calls or loads the program from the off-chip memory element to the on-chip memory element to call and execute the method executed by the terminal device in the above method embodiment.

[0190] In another implementation, the unit of the terminal device that implements each step of the above method may be configured as one or more processing elements, which are provided in the modem subsystem. The processing elements here may be integrated circuits, such as one or more ASICs, one or more DSPs, one or more FPGAs, or a combination of these integrated circuits. These integrated circuits may be integrated together to form a chip.

[0191] The units that implement the various steps of the above method in the terminal device can be integrated together and implemented in the form of a SOC chip, which is used to implement the above method. The chip can integrate at least one processing element and a storage element, and the method performed by the terminal device can be implemented by the processing element calling the program stored in the storage element; alternatively, the chip can integrate at least one integrated circuit to implement the method performed by the terminal device; alternatively, the above implementation methods can be combined, with the functions of some units being implemented by the processing element calling the program, and the functions of some units being implemented by the integrated circuit.

[0192] As can be seen, the above-mentioned apparatus for a terminal device may include at least one processing element and an interface circuit, wherein the at least one processing element is used to execute any of the methods provided in the above method embodiments. The processing element may execute some or all of the steps executed by the terminal device in a first manner: by calling a program stored in a storage element; or in a second manner: by executing some or all of the steps executed by the terminal device through the hardware integrated logic circuit in the processor element in combination with instructions. Of course, the first and second manners may also be combined to execute some or all of the steps executed by the terminal device.

[0193] The processing element here is the same as described above and can be implemented by a processor. The function of the processing element can be Figure 7 The processing unit described in the preceding claims has the same function. For example, the processing element may be a general-purpose processor, such as a CPU, or one or more integrated circuits configured to implement the above method, such as one or more ASICs, or one or more microprocessors DSPs, or one or more FPGAs, or a combination of at least two of these integrated circuit forms. The storage element may be implemented by a memory, and the function of the storage element may be the same as Figure 7The function of the storage unit described in the above is the same. The storage element can be realized by a memory, and the function of the storage element can be the same as Figure 7 The storage element can be a single memory or a collective term for multiple memories.

[0194] Figure 8 The terminal device shown is capable of implementing various processes related to the terminal device in the above method embodiment. Figure 8 The operations and / or functions of the various modules in the terminal device shown are for implementing the corresponding processes in the above method embodiments. For details, please refer to the description in the above method embodiments. To avoid repetition, detailed description is appropriately omitted here.

[0195] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0196] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure One a process or multiple processes and / or boxes Figure One A device that provides the functions specified in a block or multiple blocks.

[0197] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure One a process or multiple processes and / or boxes Figure One The function specified in one or more boxes.

[0198] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure One a process or multiple processes and / or boxes Figure One A step that specifies a function in one or more boxes.

[0199] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A communication method, characterized in that: The method is applicable to a terminal device or a chip in the terminal device, and the method includes: receiving reselection configuration information from a serving cell, the reselection configuration information including a first frequency corresponding to the serving cell, a second frequency corresponding to a neighboring cell of the serving cell, and first indication information, the first indication information being used to indicate that the cell corresponding to the second frequency includes a high-speed dedicated network (HSDN) cell; wherein the reselection priority of the second frequency is a first priority, and the first priority is lower than or equal to the reselection priority of the first frequency; and the serving cell is an HSDN cell; Obtaining a measurement result of the serving cell, and when the measurement result of the serving cell does not meet the condition for measuring the cell corresponding to the second frequency point, but the mobility state of the terminal device is a high-speed state, adjusting the reselection priority of the second frequency point from the first priority point to a second priority point, and measuring the cell corresponding to the second frequency point; the second priority point is higher than the reselection priority of the first frequency point; Reselect the cell corresponding to the second frequency point according to the measurement result of the cell corresponding to the second frequency point.

2. The method according to claim 1, characterized in that The reselection configuration information further includes second indication information, where the second indication information is used to determine a condition for measuring the cell corresponding to the second frequency point.

3. The method according to claim 2, characterized in that The measurement result of the serving cell does not meet a condition for measuring the cell corresponding to the second frequency point, including: A first signal quality indicator value corresponding to the measurement result of the serving cell is greater than a first threshold, and a second signal quality indicator value corresponding to the measurement result of the serving cell is greater than a second threshold.

4. The method according to any one of claims 1 to 3, characterized in that The cell corresponding to the second frequency includes a first cell, and the first cell belongs to the HSDN cell; Reselecting, according to a measurement result of the cell corresponding to the second frequency point, to the cell corresponding to the second frequency point includes: If the measurement result of the first cell meets the first reselection condition, the first cell is reselected.

5. The method according to claim 4, characterized in that The cell corresponding to the second frequency also includes a second cell, and the second cell is not a HSDN cell; Reselecting, according to a measurement result of the cell corresponding to the second frequency point, to the cell corresponding to the second frequency point includes: When the measurement result of the first cell does not meet the first reselection condition, if the measurement result of the second cell meets the second reselection condition, reselection is made to the second cell.

6. The method according to any one of claims 1 to 3, characterized in that The second frequency point is a different frequency point or a different system frequency point of the first frequency point.

7. The method according to any one of claims 1 to 3, characterized in that The method further comprises: When it is detected that the terminal device is in a network-lost state, it is determined whether the moving state of the terminal device is a high-speed state according to the speed measured by a speed sensor in the terminal device.

8. The method according to claim 7, characterized in that Determining whether the moving state of the terminal device is a high-speed state according to the speed measured by the speed sensor in the terminal device includes: Obtaining a filtered speed according to the speed measured by the speed sensor in the terminal device; If the filtered speed is greater than the speed threshold, it is determined that the moving state of the terminal device is a high-speed state.

9. A communication device, characterized in that: Comprising means for executing the method according to any one of claims 1 to 8.

10. A communication device, characterized in that: The method comprises a processor and a memory, wherein the processor and the memory are coupled, and the processor is configured to implement the method according to any one of claims 1 to 8.

11. A communication device, characterized in that: The method comprises a processor and an interface circuit, wherein the interface circuit is used to receive signals from other communication devices outside the communication device and transmit them to the processor or send signals from the processor to other communication devices outside the communication device, and the processor is used to implement the method according to any one of claims 1 to 8 through a logic circuit or executing code instructions.

12. A computer-readable storage medium, characterized in that The storage medium stores a computer program or instruction. When the computer program or instruction is executed by the communication device, the method according to any one of claims 1 to 8 is implemented.

13. A computer program product, characterized in that When a computer reads and executes the program or instructions in the computer program product, the method according to any one of claims 1 to 8 is implemented.

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