Cell reselection method and device in trunking communication, equipment and medium

Abstract

The invention relates to the technical field of communication, and discloses a cell reselection method, device and equipment in trunking communication and a medium, which are applied to a first terminal and comprise the following steps: receiving a broadcast signaling message of a first neighbor cell, and executing downlink synchronization on the at least one neighbor cell in the first time-frequency resource based on the received first neighbor cell broadcast signaling message so as to obtain service resource configuration information of the at least one neighbor cell, thereby executing cell reselection based on the service resource configuration information. In the method, when the first terminal needs to execute cell reselection, by using the service resource configuration information of the neighbor cell obtained from the first time-frequency resource, the overhead of broadcast signaling is reduced, the occupation of a group call service channel wireless frame can be reduced to the greatest extent, smooth and rapid switching of the cluster group call service among different cells is realized, and the user experience is improved. Therefore, the continuity of the first terminal on the voice service is ensured.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and specifically to cell reselection methods, apparatus, equipment and media in trunked radio communication. Background Technology

[0002] In trunked radio communication systems, the signaling capacity of each time slot or resource block on a physical dedicated channel is limited. When the network is large and multiple neighboring cells exist, it is necessary to carry time-frequency resource information about the neighboring cell's group call control channel and service channel in the neighboring cell broadcast signaling. In this case, the overhead of the neighboring cell broadcast signaling may increase significantly, as transmitting the complete neighboring cell broadcast signaling requires additional time slots or subframes, thus affecting system bandwidth and capacity. When the neighboring cell broadcast signaling occupies too many voice frames, it may lead to voice frame loss. Therefore, ensuring signal continuity after cell reselection is a problem that needs to be solved. Summary of the Invention

[0003] In view of this, the present invention provides a cell reselection method, apparatus, device and medium in trunked communication to solve the problem of difficulty in ensuring signal continuity after cell reselection.

[0004] In a first aspect, the present invention provides a cell reselection method in trunked radio communication, applied to a first terminal, wherein the first terminal is a group call terminal of the trunked radio communication, the method comprising: Receive a first neighboring cell broadcast signaling message, the first neighboring cell broadcast signaling message including the identification information of at least one neighboring cell, the neighboring cell being the neighboring cell of the cell where the first terminal is currently located; Based on the broadcast signaling message of the first neighboring cell, downlink synchronization is performed on the at least one neighboring cell using the first time-frequency resource to obtain the service resource configuration information of the at least one neighboring cell; Cell reselection shall be performed at least based on the aforementioned service resource configuration information.

[0005] In an optional implementation, the step of performing downlink synchronization on the at least one neighboring cell using the first neighboring cell broadcast signaling message to obtain the service resource configuration information of the at least one neighboring cell in the first time-frequency resource includes: Based on the identification information of neighboring cells in the first neighboring cell broadcast signaling message, a list of neighboring cells is determined; Obtain the physical synchronization channel time-frequency resource information of the neighboring cells in the neighboring cell list; Based on the physical synchronization channel time-frequency resource information of the neighboring cells, downlink synchronization is performed on the at least one neighboring cell using the first time-frequency resource to obtain the service resource configuration information of the at least one neighboring cell.

[0006] In one optional implementation, the identification information is index information.

[0007] In one optional implementation, the step of performing downlink synchronization on the at least one neighboring cell using the physical synchronization channel time-frequency resource information of the neighboring cell to obtain the service resource configuration information of the at least one neighboring cell includes: Obtain the control resource configuration information of the neighboring cell; Based on the group call control channel time-frequency resource information and the physical synchronization channel time-frequency resource information, the call setup signaling is read from the group call control channel of at least one neighboring cell; The call setup signaling is parsed to obtain the service resource configuration information of the at least one neighboring cell.

[0008] In one optional implementation, the control resource configuration information includes group call control channel time-frequency resource information.

[0009] In one optional implementation, the physical synchronization channel time-frequency resource information is pre-stored in the first terminal.

[0010] In one optional implementation, the service resource configuration information includes group call service channel time and frequency resource information.

[0011] In one optional implementation, the step of performing cell reselection at least based on the service resource configuration information includes: If the signal strength of the cell where the first terminal is currently located is lower than a preset measurement threshold, the signal strength of the neighboring cells is measured to obtain the measurement ranking results of the neighboring cells; Based on the measurement and ranking results of the neighboring cells, at least one target neighboring cell is determined from the neighboring cells; Cell reselection is performed based on the service resource configuration information of the at least one target neighboring cell.

[0012] In an optional implementation, before performing signal measurements on the neighboring cells, the method further includes: Downlink synchronization is re-performed on at least one neighboring cell using the first time-frequency resource.

[0013] In one alternative implementation, the first time-frequency resource is a non-receiving time slot.

[0014] In one optional implementation, the first neighboring cell broadcast signaling message is sent by the network-side device based on a preset period.

[0015] Secondly, a cell reselection method in trunked communication, applied to network-side equipment, the method comprising: The first neighboring cell broadcast signaling is generated based on a preset period and broadcast. The first neighboring cell broadcast signaling message includes the identification information of at least one neighboring cell.

[0016] Thirdly, the present invention provides a cell reselection device in trunked communication, applied to a first terminal, wherein the first terminal is a group call terminal of the trunked communication, and the device includes: The message receiving module is used to receive a first neighboring cell broadcast signaling message. The first neighboring cell broadcast signaling message includes identification information of at least one neighboring cell. The neighboring cell is a neighboring cell of the cell where the first terminal is currently located. The first terminal is the group call terminal of the trunking communication. The downlink synchronization module is used to perform downlink synchronization on the at least one neighboring cell based on the broadcast signaling message of the first neighboring cell and to obtain the service resource configuration information of the at least one neighboring cell in the first time-frequency resource; The cell reselection module is used to perform cell reselection based at least on the service resource configuration information.

[0017] Fourthly, the present invention provides an electronic device, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to perform the cell reselection method in the first aspect or any corresponding embodiment thereof, as well as the cell reselection method in the trunking communication of the second aspect.

[0018] Fifthly, the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to perform the cell reselection method in trunked communication described in the first aspect or any corresponding embodiment thereof, as well as the cell reselection method in the second aspect.

[0019] The cell reselection method in trunked communication provided in this embodiment of the invention is applied to a first terminal. It includes receiving a broadcast signaling message from a first neighboring cell, performing downlink synchronization on at least one neighboring cell using first time-frequency resources based on the received broadcast signaling message to obtain service resource configuration information of at least one neighboring cell, and then performing cell reselection based on the service resource configuration information. In this method, when the first terminal needs to perform cell reselection, the service resource configuration information of the neighboring cells obtained from the first time-frequency resources is used to reduce the overhead of broadcast signaling, minimizing the occupation of radio frames on the group call service channel, and enabling smooth and rapid handover of trunked group call services between different cells, thereby ensuring the continuity of voice services for the first terminal. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a flowchart illustrating a cell reselection method in trunked communication according to an embodiment of the present invention. Figure 2 This is a schematic diagram of cell reselection in trunking communication according to an embodiment of the present invention; Figure 3 This is a schematic diagram of another cell reselection method in trunking communication according to an embodiment of the present invention; Figure 4 This is a structural block diagram of a cell reselection device in trunking communication according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In satellite communication scenarios, neighbor cell broadcasting technology transmits carrier IDs and time slot resources allocated by the neighbor cell group call service channel on the serving cell. The terminal can obtain the group call radio resource parameters of the neighbor cell in advance. After cell reselection, the terminal can automatically switch to the radio resource of the new cell group call to continue listening, ensuring the continuity of voice reception during the terminal's movement.

[0024] In communication systems, satellite communication systems have limited space-to-ground link bandwidth resources, and the signaling size that each time slot on each physical dedicated channel can carry is limited. In large networks, multiple neighboring cells may exist. Neighboring cell broadcast signaling carries the time-frequency resources of neighboring cell group call control channels and service channels. Neighboring cell broadcast signaling has a large overhead, and transmitting complete neighboring cell broadcast signaling often requires additional time slots or subframes, thus affecting bandwidth and capacity. Because the physical resources of neighboring cell broadcast signaling and downlink group call service channels are reused, downlink group call voice frames cannot be transmitted when transmitting neighboring cell broadcast signaling. Occupying too many voice frames may lead to voice frame drops, affecting the user's call experience. Based on this, embodiments of the present invention provide a cell reselection method in trunked communication, which can be used in satellite communication systems consisting of low Earth orbit (LEO), medium Earth orbit (MEO), and high Earth orbit (GEO) satellites. Terminals can move within the beam coverage areas of different satellites or switch between different beams of the same satellite.

[0025] According to an embodiment of the present invention, a cell reselection method embodiment in trunked communication is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0026] This embodiment provides a cell reselection method in trunked radio communication, applied to a first terminal, which is a group call terminal in trunked radio communication, such as a walkie-talkie, vehicle-mounted radio, or other communication equipment. Figure 1 This is a flowchart of a cell reselection method in trunked communication according to an embodiment of the present invention, such as... Figure 1 As shown, the process includes the following steps: Step S101: Receive the broadcast signaling message from the first neighboring cell.

[0027] In some optional implementations, the first neighboring cell broadcast signaling message is sent by the network-side device based on a preset period. The network-side device is a base station terminal in the trunked communication system. If the first terminal establishes a voice call, the trunked communication system establishes a group call context. Specifically, the voice call represents a trunked voice group call. When the first terminal initiates a group call request, the network-side device makes a decision on the group call request based on the first terminal's permissions. If the decision is successful, other called terminals in the group are added to the group call via multicast signaling according to the group call number. The trunked group call context refers to a set of information established and maintained in the trunked communication system to support the group call function. This information is used to manage and control the group call process. The trunked group call context typically includes: group call number, group call temporary number, call parameters (call type, priority, media parameters, etc.), multicast IP, group member information (speaking terminal number, list of called terminals in the group), base station ID joining the group call, cell ID, radio access side bearer information (radio access bearer ID, quality of service parameters, transport layer address, GTP tunnel ID), resource allocation information, scheduling information, etc.

[0028] The network-side equipment generates a first neighboring cell broadcast signaling message based on the current network conditions, cell configuration, and the user's serving cell. This first neighboring cell broadcast signaling message includes identification information of at least one neighboring cell. The neighboring cell is the cell next to the cell where the first terminal is currently located, and may include neighboring cells that do not participate in trunk communication. The identification information represents information that uniquely identifies or points to a specific neighboring cell, including but not limited to numbers or letters, physical cell identifiers (e.g., PCI in LTE / 5G, which represents a short code that directly identifies the cell at the radio signal layer), etc.

[0029] The broadcast signaling from the first neighboring cell and the downlink group call voice share the time slot allocated to the group call service channel, but they correspond to different logical channels. The broadcast signaling from the neighboring cell has a higher transmission priority than voice data.

[0030] To ensure that all terminals can obtain the latest neighbor cell information in a timely manner, the network-side equipment can periodically send a first neighbor cell broadcast signaling message. The preset period can be set according to the network's rate of change and the terminal's mobility. Step S102: Based on the first neighbor cell broadcast signaling message, downlink synchronization is performed on at least one neighbor cell using the first time-frequency resource to obtain the service resource configuration information of at least one neighbor cell.

[0031] After receiving the first neighboring cell broadcast signaling message, the first terminal evaluates the neighboring cells based on the neighboring cell identification information carried in the first neighboring cell broadcast signaling message. Specifically, the first terminal first extracts the identification information of each neighboring cell from the first neighboring cell broadcast signaling message, and determines the set of neighboring cells that need to be evaluated based on the identification information of the neighboring cells. The set of neighboring cells can be sorted in the form of a list.

[0032] Furthermore, the first terminal obtains downlink synchronization resource configuration information of each neighboring cell in the neighboring cell set. This downlink synchronization resource configuration information may include time-frequency resource information of the physical synchronization channel, such as the time-frequency location of the primary synchronization signal and the secondary synchronization signal.

[0033] In some optional implementations, the physical synchronization channel time-frequency resource information is pre-stored in the first terminal, and the first terminal can obtain it by querying the stored cell reselection parameters.

[0034] The first terminal performs downlink synchronization with at least one neighboring cell on the first time-frequency resource. The first time-frequency resource refers to the collective time and frequency resources that the first terminal can use to interrupt or suspend receiving group call services from the current serving cell in order to perform downlink synchronization with neighboring cells. The first time-frequency resource is separated from the original group call service's receiving resources in the time or frequency dimension, ensuring that the first terminal will not interrupt or otherwise affect the ongoing group call service when executing the steps of this scheme. The first terminal then switches to the extracted physical synchronization channels of each neighboring cell to establish downlink time and frequency synchronization with the neighboring cells.

[0035] In some alternative implementations, the first time-frequency resource is a non-receive time slot, which is a time resource configured in advance or indicated by the network side via signaling, used by the first terminal to interrupt receiving group call services in order to perform neighbor cell measurements.

[0036] After completing downlink synchronization, the first terminal further acquires the service resource configuration information of each neighboring cell. Since the broadcast signaling message of the first neighboring cell does not include the service resource configuration information of the neighboring cells, the first terminal needs to actively acquire it. Service resource configuration information refers to the set of network resource parameters required by the first terminal to send or receive group call service data (such as voice, video, and other user plane data). It is the transmission resource that carries the actual call content. Its function is to indicate the channel for the first terminal to participate in group call communication. Specifically, it may include the time-frequency resource information of the group call service channel; the spatial resource configuration of the service channel, such as the receive or transmit beam information corresponding to the service data; and the power control parameters related to the service channel.

[0037] Specifically, the first terminal first obtains the control resource configuration information of the neighboring cells, including the time and frequency resource information of the group call control channel. Based on the control resource configuration information and the time and frequency resource information of the physical synchronization channel, it jumps to the group call control channel of the neighboring cells to read the group call control signaling. By parsing the group call control signaling, it extracts the service resource configuration information of each neighboring cell.

[0038] Step S103: Perform cell reselection based at least on service resource configuration information.

[0039] The first terminal continuously monitors the signal quality of the current serving cell. When the signal strength of the current serving cell is detected to be lower than a preset measurement threshold, cell reselection needs to be performed, that is, determining a neighboring cell for hopping from among the neighboring cells. The determination process includes comparing the signal strength, signal quality, availability time, etc., among neighboring cells. Taking signal strength comparison as an example, the neighboring cells can be ranked by measuring the signal quality of all neighboring cells, and the target neighboring cell can be selected. Using the obtained service resource configuration information of the target neighboring cell, downlink voice and signaling continue to be monitored on the group call service channel of the target neighboring cell.

[0040] In some alternative implementations, the trunking communication system is a satellite communication system. In this scenario, neighboring cells can specifically correspond to adjacent beams in the satellite communication system, and the cell reselection process is the process of the terminal switching between different satellite beams or between different beams of the same satellite.

[0041] The cell reselection method in trunked communication provided in this embodiment of the invention is applied to a first terminal. It includes receiving a broadcast signaling message from a first neighboring cell, performing downlink synchronization on at least one neighboring cell using first time-frequency resources based on the received broadcast signaling message to obtain service resource configuration information of at least one neighboring cell, and then performing cell reselection based on the service resource configuration information. In this method, when the first terminal needs to perform cell reselection, the service resource configuration information of the neighboring cells obtained from the first time-frequency resources is used to reduce the overhead of broadcast signaling, minimizing the occupation of radio frames on the group call service channel, and enabling smooth and rapid handover of trunked group call services between different cells, thereby ensuring the continuity of voice services for the first terminal.

[0042] In some optional implementations, step S102 above includes: Step S201: Determine the list of neighboring cells based on the identification information of neighboring cells in the first neighboring cell broadcast signaling message.

[0043] After receiving and parsing the first neighboring cell broadcast signaling message, the first terminal generates a set of neighboring cells, i.e., a neighboring cell list, based on the identification information of the neighboring cells carried therein.

[0044] Furthermore, the identification information is index information. The index information can be a serial number or code in the form of numbers or letters.

[0045] Step S202: Obtain the physical synchronization channel time-frequency resource information of neighboring cells in the neighboring cell list.

[0046] The physical synchronization channel is located at the primary frequency of each cell, with a fixed transmission period, frame number, and intra-frame time slot. To establish communication connections with each cell in the neighboring cell list, the first terminal first needs to obtain the resource configuration used for initial time and frequency synchronization, i.e., the physical synchronization channel time-frequency resource information. The physical synchronization channel time-frequency resource information is pre-stored in the first terminal, which can obtain the physical synchronization channel time-frequency resource information from pre-stored system messages or the cell reselection parameter database.

[0047] Step S203: Based on the physical synchronization channel time-frequency resource information of neighboring cells, downlink synchronization is performed on at least one neighboring cell using the first time-frequency resource to obtain the service resource configuration information of at least one neighboring cell.

[0048] Based on the acquired physical synchronization channel time-frequency resource information, downlink synchronization is performed sequentially on one or more neighboring cells in the neighboring cell list on the first time-frequency resource. This includes the first terminal tuning the receiver to the frequency of the target neighboring cell, capturing the synchronization signal at the specified time domain position, and then completing frame timing synchronization and frequency deviation correction to align itself with the signals of the neighboring cells in time and frequency.

[0049] After establishing downlink synchronization with neighboring cells, the first terminal then obtains the service resource configuration information of the neighboring cells. This message is not carried in the broadcast signaling of the first neighboring cell, so the first terminal first needs to obtain the control resource configuration information of the neighboring cells, including the time and frequency resource information of the group call control channel. Based on the control resource configuration information and the time and frequency resource information of the physical synchronization channel, the terminal jumps to the group call control channel of the neighboring cell to read the group call control signaling. By parsing the group call control signaling, the service resource configuration information of each neighboring cell is extracted.

[0050] Further, step S203 includes: obtaining control resource configuration information of neighboring cells; based on the group call control channel time-frequency resource information and the physical synchronization channel time-frequency resource information, hopping to the group call control channel of at least one neighboring cell to read call establishment signaling; parsing the call establishment signaling to obtain service resource configuration information of at least one neighboring cell.

[0051] Control resource configuration information refers to the set of network resource parameters required by the first terminal to locate, listen to, and decode control signaling. It is the transmission resource carrying signaling such as system scheduling and group call management instructions, and its function is to guide the terminal on how to obtain communication instructions. Specifically, it may include group call control channel time-frequency resource information; spatial resource configuration of the control channel, such as specific beam identifiers or reference signals; modulation and coding schemes related to the control channel; and transmission period and timing information of the control channel. In some optional implementations, the control resource configuration information includes group call control channel time-frequency resource information.

[0052] The first terminal first retrieves control resource configuration information from pre-stored data or system messages, and, in conjunction with the newly established downlink synchronization, jumps to the group call control channel of a neighboring cell. It then reads and parses the periodically transmitted group call control signaling on that channel, extracting service resource configuration information for receiving group call voice or data from the signaling. In some optional implementations, the service resource configuration information includes time-frequency resource information for the group call service channel. The above steps are repeated until the service resource configuration information of all neighboring cells is parsed and saved.

[0053] In some optional implementations, step S103 above includes: Step S301: If the signal strength of the cell where the first terminal is currently located is lower than the preset measurement threshold, the signal strength of the neighboring cells is measured to obtain the measurement ranking results of the neighboring cells.

[0054] The measurement threshold is a preset signal requirement, including signal strength and signal quality. It can be carried by the broadcast signaling message of the first neighboring cell or pre-stored in the first terminal. The first terminal continuously monitors the signal strength of neighboring cells. When the detected signal strength is lower than the preset measurement threshold, it indicates that the channel quality of the current serving cell may not be able to guarantee stable reception of group call services. The first terminal performs a comprehensive evaluation and ranking of neighboring cells based on preset measurement criteria, using signal strength as the ranking index, and generates the measurement ranking results of neighboring cells.

[0055] Step S302: Based on the measurement ranking results of neighboring cells, at least one target neighboring cell is determined from the neighboring cells.

[0056] After obtaining the measurement and ranking results of neighboring cells, the first terminal makes a comprehensive judgment based on the acquired service resource configuration information to ensure that the neighboring cell with the highest signal quality ranking is selected as the target neighboring cell from the neighboring cells for which service resource configuration information has been acquired. This ensures that the selected target neighboring cell not only meets the signal quality requirements, but also allows the first terminal to quickly access and execute group call services.

[0057] Step S303: Perform cell reselection based on the service resource configuration information of at least one target neighboring cell.

[0058] Based on the obtained service resource configuration information of the target neighboring cell, a reselection process to the target cell is executed. Specifically, the service resource configuration information includes the time and frequency resource information of the group call service channel of the target neighboring cell. After the target neighboring cell is determined, the saved service resource configuration information can be used immediately without interruption to resume the monitoring and reception of downlink voice and signaling on the group call service channel of the target neighboring cell, thereby realizing the smooth and fast switching of the trunking group call service between different cells and ensuring the continuity of the first terminal in voice service.

[0059] In some alternative implementations, before performing signal measurements on neighboring cells, the method further includes: re-performing downlink synchronization on at least one neighboring cell using a first time-frequency resource.

[0060] When the signal strength of the serving cell is lower than the preset measurement threshold, the first terminal starts the neighbor cell measurement. First, in the first time-frequency resource, i.e. the non-receive time slot, it jumps to the physical synchronization channel of the neighbor cell to re-establish downlink synchronization with the neighbor cell, so as to facilitate subsequent signal measurement of the neighbor cell.

[0061] This embodiment provides a cell reselection method in trunking communication, applied to a network-side device. The method includes: generating a first neighboring cell broadcast signaling based on a preset period, and broadcasting the first neighboring cell broadcast signaling message, wherein the first neighboring cell broadcast signaling message includes identification information of at least one neighboring cell.

[0062] The network-side equipment is a base station terminal in the trunked communication system. If the first terminal establishes a voice call, the trunked communication system establishes a group call context. Specifically, the voice call represents a trunked voice group call. When the first terminal initiates a group call request, the network-side equipment makes a decision on the group call request based on the first terminal's permissions. If the decision is successful, other called terminals in the group are added to the group call via multicast signaling based on the group call number. The network-side equipment generates a first neighboring cell broadcast signaling message based on the current network conditions, cell configuration, and the user's serving cell. This first neighboring cell broadcast signaling message includes identification information for at least one neighboring cell. The neighboring cell is the neighboring cell of the cell where the first terminal is currently located, and may include neighboring cells that do not participate in trunked communication. The identification information represents information that uniquely identifies or points to a specific neighboring cell, including but not limited to numbers or letters, physical cell identifiers (e.g., PCI in LTE / 5G, which represents a short code that directly identifies the cell at the radio signal layer), etc.

[0063] This embodiment provides a cell reselection method in trunked communication. In this method, after receiving broadcast signaling from a first neighboring cell and parsing to obtain a list of neighboring cells, the first terminal first initiates neighboring cell measurement when the signal strength of the current serving cell is below a measurement threshold, thereby obtaining the target cell based on the measurement ranking results of the neighboring cells. During non-receiving time slots, the time-frequency parameters of the group call service channel of the target cell are obtained, and then the target neighboring cell is reselected based on the time-frequency parameters of the group call service channel.

[0064] In non-receive time slots, obtaining the time-frequency parameters of the group call service channel of the target neighboring cell includes the following steps: Step a1: The first terminal determines the availability of downlink synchronization information based on its freshness. If available, proceed to step a3; otherwise, proceed to step a2. Freshness can include the measurement period, the first terminal's measurement behavior, and network configuration. Specifically, a shorter measurement period and more frequent measurements of neighboring cell signals by the first terminal result in higher freshness of the downlink synchronization information. In high-speed mobile scenarios, the first terminal may need to measure at a higher frequency to ensure timely acquisition of signal changes in neighboring cells. The network side can optimize the measurement process by adjusting measurement parameters (such as threshold values ​​and hysteresis values) to reduce unnecessary measurements, thereby indirectly affecting the freshness of the information.

[0065] Step a2: In the non-receiving time slot, the first terminal switches to the neighboring cell physical synchronization channel to establish downlink synchronization with the target neighboring cell.

[0066] Step a3: The first terminal jumps to the group call control channel of the target neighboring cell to read the call setup signaling based on the group call control channel time and frequency parameters in the saved system message, and parses and saves the group call service channel time and frequency parameters of that cell.

[0067] This embodiment provides a cell reselection method in trunked communication, such as... Figure 2 The diagram illustrates cell reselection in trunked radio communication. UE1 (user equipment) is the first terminal, while UE2, UE3, and UE4 are in the same group. After the group call is established, UE2 is the calling party, and UE1, UE3, and UE4 are the listening terminals. As UE1 moves, it reselects from cell A to cell D. The network-side equipment broadcasts a neighboring cell message from cell A. Upon receiving this message, UE1 efficiently and quickly switches to cell D.

[0068] The specific implementation of the method is as follows Figure 3 As shown, cell A is the cell where the first terminal is currently located, and cells B, C, and D are neighboring cells of cell A. Assuming cell C is the target neighboring cell for cell reselection by the first terminal UE1, the method includes the following steps: Step b1: When a voice call is established, the system establishes a group call context in cells A, B, C, and D; Step b2: The system generates first neighboring cell broadcast signaling for cells A, B, C, and D; Step b3: For UE1, the system sends the first neighboring cell broadcast signaling in cell A, which includes the indexes of cell B, cell C, and cell D; Step b4: UE1 receives the first neighboring cell broadcast signaling, parses it to obtain the neighboring cell list, including cell B, cell C, and cell D; Step b5: In the non-receiving time slot, UE1 sequentially performs downlink synchronization on cells B, C, and D, and reads the time-frequency parameters of the group call service channel in cells B, C, and D. Step b6: When the signal strength of the serving cell (cell A) is lower than the preset measurement threshold, UE1 starts neighbor cell measurement, re-establishes downlink synchronization for cells B, C, and D, and performs the measurement. Step b7: UE1 sorts cell B, cell C and cell D according to the measurement results in step b6, and determines cell C as the target neighbor cell; Step b8: After UE1 is reselected to cell C, it continues to listen to downlink voice and signaling on the group call service channel using the time-frequency parameters of the neighboring cell's group call service channel saved in step b5.

[0069] The cell reselection method in trunking communication provided in this embodiment eliminates the need to carry the time-frequency parameters of the neighboring cell group call control channel and the group call service channel in the first neighboring cell broadcast signaling, thus reducing the overhead of neighboring cell broadcast signaling. In the first neighboring cell broadcast signaling, only the cell identifier information of the established group call context is sent; the first terminal does not need to perform measurements on all neighboring cells configured in the system message. This method reduces the power consumption caused by terminal carrier switching and neighboring cell measurements. While reducing the overhead of the first neighboring cell broadcast signaling, it minimizes the occupation of radio frames on the group call service channel, reduces voice dropouts, and reduces the occupation of downlink physical channels, ensuring downlink bandwidth and trunking group call capacity. Terminals entering a group call only perform reselection among the candidate neighboring cells of the established group call, avoiding voice dropouts after cell reselection and ensuring the continuity of terminal voice services.

[0070] This embodiment also provides a cell reselection device in trunked communication, which is used to implement the above embodiments and preferred embodiments, and will not be repeated as already described. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0071] This embodiment provides a cell reselection device in trunked radio communication, applied to a first terminal, which is a group call terminal in trunked radio communication, such as... Figure 4 As shown, it includes: The message receiving module 401 is used to receive a first neighboring cell broadcast signaling message. The first neighboring cell broadcast signaling message includes identification information of at least one neighboring cell. The neighboring cell is a neighboring cell of the cell where the first terminal is currently located. The first terminal is the group call terminal of the trunking communication. Downlink synchronization module 402 is used to perform downlink synchronization on the at least one neighboring cell based on the broadcast signaling message of the first neighboring cell and obtain the service resource configuration information of the at least one neighboring cell in the first time-frequency resource; Cell reselection module 403 is used to perform cell reselection based at least on the service resource configuration information.

[0072] In some alternative implementations, the downlink synchronization module 402 includes: The list determination unit is used to determine a list of neighboring cells based on the identification information of neighboring cells in the first neighboring cell broadcast signaling message; The first information acquisition unit is used to acquire the physical synchronization channel time-frequency resource information of the neighboring cells in the neighboring cell list; The second information acquisition unit is used to perform downlink synchronization on the at least one neighboring cell based on the physical synchronization channel time-frequency resource information of the neighboring cell to obtain the service resource configuration information of the at least one neighboring cell.

[0073] In some optional implementations, the identification information is index information.

[0074] In some optional implementations, the second information acquisition unit includes: A control resource configuration information acquisition subunit is used to acquire the control resource configuration information of the neighboring cell; The jump-rotor unit is used to jump to the group call control channel of at least one neighboring cell to read call establishment signaling based on the group call control channel time-frequency resource information and the physical synchronization channel time-frequency resource information; The signaling parsing subunit is used to parse the call setup signaling and obtain the service resource configuration information of the at least one neighboring cell.

[0075] In some optional implementations, the control resource configuration information includes group call control channel time-frequency resource information.

[0076] In some optional implementations, the physical synchronization channel time-frequency resource information is pre-stored in the first terminal.

[0077] In some optional implementations, the service resource configuration information includes group call service channel time-frequency resource information.

[0078] In some alternative implementations, the cell reselection module 403 includes: The signal measurement unit is used to measure the signal strength of the neighboring cells if the signal strength of the cell where the first terminal is currently located is lower than a preset measurement threshold, so as to obtain the measurement ranking results of the neighboring cells; The target neighbor cell determination unit is used to determine at least one target neighbor cell from the neighbor cells based on the measurement ranking results of the neighbor cells; The cell reselection unit is used to perform cell reselection based on the service resource configuration information of the at least one target neighboring cell.

[0079] In some alternative implementations, the cell reselection module 403 further includes: The second downlink synchronization unit is used to re-perform downlink synchronization on the at least one neighboring cell using the first time-frequency resource.

[0080] In some alternative implementations, the first time-frequency resource is a non-receive time slot.

[0081] In some optional implementations, the first neighboring cell broadcast signaling message is sent by the network-side device based on a preset period.

[0082] This embodiment provides a cell reselection device in trunked communication, applied to network-side equipment, including: The signaling generation module is used to generate first neighboring cell broadcast signaling based on a preset period and broadcast the first neighboring cell broadcast signaling message, wherein the first neighboring cell broadcast signaling message includes identification information of at least one neighboring cell.

[0083] Further functional descriptions of the above modules and units are the same as those in the corresponding embodiments described above, and will not be repeated here.

[0084] In this embodiment, the cell reselection device is presented in the form of a functional unit. Here, a unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that execute one or more software or fixed programs, and / or other devices that can provide the above functions.

[0085] This invention also provides an electronic device having the above-described cell reselection device.

[0086] Please see Figure 5 , Figure 5 This is a schematic diagram of the structure of an electronic device provided in an optional embodiment of the present invention, such as... Figure 5As shown, the electronic device includes one or more processors 10, memory 20, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise as required. The processors can process instructions executed within the electronic device, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to the interfaces). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple electronic devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 5 Take a processor 10 as an example.

[0087] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GDA), or any combination thereof.

[0088] The memory 20 stores instructions executable by at least one processor 10 to cause the at least one processor 10 to perform the method shown in the above embodiments.

[0089] The memory 20 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the electronic device. Furthermore, the memory 20 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some alternative embodiments, the memory 20 may optionally include memory remotely located relative to the processor 10, and these remote memories may be connected to the electronic device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0090] The memory 20 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0091] The computer device also includes a communication interface 30 for communicating with other devices or communication networks.

[0092] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code, which, when accessed and executed by the computer, processor, or hardware, implements the methods shown in the above embodiments.

[0093] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and all such modifications and variations fall within the scope defined by the invention.

Claims

1. A cell reselection method in trunked radio communication, characterized in that, Applied to a first terminal, which is the group call terminal of the trunking communication, the method includes: Receive a first neighboring cell broadcast signaling message, the first neighboring cell broadcast signaling message including the identification information of at least one neighboring cell, the neighboring cell being the neighboring cell of the cell where the first terminal is currently located; Based on the broadcast signaling message of the first neighboring cell, downlink synchronization is performed on the at least one neighboring cell using the first time-frequency resource to obtain the service resource configuration information of the at least one neighboring cell; Cell reselection shall be performed at least based on the aforementioned service resource configuration information.

2. The method according to claim 1, characterized in that, The step of performing downlink synchronization on at least one neighboring cell using the first time-frequency resource based on the broadcast signaling message of the first neighboring cell to obtain the service resource configuration information of the at least one neighboring cell includes: Based on the identification information of neighboring cells in the first neighboring cell broadcast signaling message, a list of neighboring cells is determined; Obtain the physical synchronization channel time-frequency resource information of the neighboring cells in the neighboring cell list; Based on the physical synchronization channel time-frequency resource information of the neighboring cells, downlink synchronization is performed on the at least one neighboring cell using the first time-frequency resource to obtain the service resource configuration information of the at least one neighboring cell.

3. The method according to claim 1, characterized in that, The identification information is index information.

4. The method according to claim 2, characterized in that, The step of performing downlink synchronization on at least one neighboring cell using the physical synchronization channel time-frequency resource information of the neighboring cells to obtain the service resource configuration information of the at least one neighboring cell includes: Obtain the control resource configuration information of the neighboring cell; Based on the group call control channel time-frequency resource information and the physical synchronization channel time-frequency resource information, the call setup signaling is read from the group call control channel of at least one neighboring cell; The call setup signaling is parsed to obtain the service resource configuration information of the at least one neighboring cell.

5. The method according to claim 4, characterized in that, The control resource configuration information includes group call control channel time and frequency resource information.

6. The method according to claim 4, characterized in that, The physical synchronization channel time-frequency resource information is pre-stored in the first terminal.

7. The method according to claim 4, characterized in that, The service resource configuration information includes time and frequency resource information for group call service channels.

8. The method according to claim 1, characterized in that, The process of performing cell reselection based at least on the service resource configuration information includes: If the signal strength of the cell where the first terminal is currently located is lower than a preset measurement threshold, the signal strength of the neighboring cells is measured to obtain the measurement ranking results of the neighboring cells; Based on the measurement and ranking results of the neighboring cells, at least one target neighboring cell is determined from the neighboring cells; Cell reselection is performed based on the service resource configuration information of the at least one target neighboring cell.

9. The method according to claim 8, characterized in that, Before performing signal measurements on the neighboring cells, the method further includes: Downlink synchronization is re-performed on at least one neighboring cell using the first time-frequency resource.

10. The method according to claim 1, characterized in that, The first time-frequency resource is a non-receiving time slot.

11. The method according to claim 1, characterized in that, The first neighboring cell broadcast signaling message is sent by the network-side device based on a preset period.

12. A cell reselection method in trunked radio communication, characterized in that, Applied to network-side devices, the method includes: The first neighboring cell broadcast signaling is generated based on a preset period and broadcast. The first neighboring cell broadcast signaling message includes the identification information of at least one neighboring cell.

13. A cell reselection device in trunked communication, characterized in that, Applied to a first terminal, wherein the first terminal is a group call terminal for the trunking communication, the device includes: The message receiving module is used to receive a first neighboring cell broadcast signaling message. The first neighboring cell broadcast signaling message includes identification information of at least one neighboring cell. The neighboring cell is a neighboring cell of the cell where the first terminal is currently located. The first terminal is the group call terminal of the trunking communication. The downlink synchronization module is used to perform downlink synchronization on the at least one neighboring cell based on the broadcast signaling message of the first neighboring cell and to obtain the service resource configuration information of the at least one neighboring cell in the first time-frequency resource; The cell reselection module is used to perform cell reselection based at least on the service resource configuration information.

14. An electronic device, characterized in that, include: A memory and a processor are communicatively connected, the memory storing computer instructions, and the processor executing the computer instructions to perform the cell reselection method in trunking communication as described in any one of claims 1 to 11 or 12.

15. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to perform the cell reselection method in trunked communication as described in any one of claims 1 to 11 or 12.

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