Communication processing method and device, equipment and readable storage medium

Abstract

The embodiment of the invention provides a communication processing method and device, equipment and a readable storage medium. The method comprises the following steps: receiving a measurement report of L1; determining a TA value of a switching target cell according to the measurement report of the L1; respectively sending the TA value to a terminal and a second network element, wherein the TA value is used for the terminal and the second network element to perform uplink and / or downlink transmission so as to complete switching; wherein the first network element is located in a source cell, and the second network element is located in a switching target cell.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of communication technologies, and particularly to a communication processing method, apparatus, device, and readable storage medium. Background Art

[0002] An important process in a wireless communication system is handover. To ensure the reliability and low latency of handover, various handover enhancement schemes are provided in related technologies, such as Conditional Handover (CHO), L1 / L2 Triggered Mobility (LTM), and Random AccessChannel-less (RACH-less) cell handover schemes of LTM. How to reduce the latency of the handover process and improve the handover success rate is an urgent problem to be solved. Summary of the Invention

[0003] Embodiments of the present application aim to provide a communication processing method, apparatus, device, and readable storage medium to solve the problem of how to reduce the latency of the handover process and improve the handover success rate.

[0004] In a first aspect, a communication processing method is provided, which is applied to a first network element and includes:

[0005] Receiving a measurement report of L1;

[0006] Determining a TA value of a handover target cell according to the measurement report of L1;

[0007] Sending the TA value to a terminal and a second network element respectively, where the TA value is used for the terminal and the second network element to perform uplink and / or downlink transmission to complete the handover;

[0008] Wherein, the first network element is located in a source cell, and the second network element is located in a handover target cell.

[0009] Optionally, determining a TA value of a handover target cell according to the measurement report of L1 includes:

[0010] Obtaining a path loss of the source cell and a path loss of a handover candidate cell according to the measurement report of L1;

[0011] Calculating a theoretical TA value of the source cell according to the path loss of the source cell;

[0012] Calculating a spatial characteristic factor according to the theoretical TA value of the source cell and the actual TA value of the source cell;

[0013] Calculating a theoretical TA value of the handover candidate cell according to the path loss of the handover candidate cell;

[0014] Calculate the true TA value of the handover candidate cell according to the theoretical TA value of the handover candidate cell and the spatial characteristic factors;

[0015] Determine the TA value of the handover target cell according to the true TA value of the handover candidate cell and the selected handover target cell.

[0016] Optionally, the method further includes:

[0017] Select a handover target cell according to a preset condition;

[0018] Wherein, the selection condition includes:

[0019] Preferably select a neighboring cell in a low frequency band and with a high cell reference power as a handover candidate cell, and select a cell with a small TA value from the handover candidate cells as the handover target cell;

[0020] Or, preferably select a neighboring cell with a large coverage area as a handover candidate cell, and select a cell with a small TA value from the handover candidate cells as the handover target cell.

[0021] Optionally, before receiving the measurement report of L1, the method further includes:

[0022] Obtain the power information of the handover candidate cell.

[0023] Optionally, sending the TA value to the terminal includes:

[0024] Send a first message to the terminal, where the first message is used to indicate the handover target cell and / or trigger the terminal to perform uplink and / or downlink data transmission in the handover target cell.

[0025] Optionally, the first message includes at least one of the following: handover target cell indication, TA value of the handover target cell.

[0026] Optionally, sending the TA value to a second network element includes:

[0027] Send a second message to the second network element, where the second message is used to indicate the TA value of the handover target cell, and / or trigger uplink and / or downlink resource pre-authorization in the handover target cell and perform uplink and / or downlink data transmission.

[0028] Optionally, the TA value included in the uplink resource pre-authorization is a relative value with respect to the TA MAC CE.

[0029] Optionally, the first network element is a first DU, the second network element is a second DU, and the first DU and the second DU are connected to the CU.

[0030] In a second aspect, a communication processing method is provided, which is applied to a terminal and includes:

[0031] Sending a measurement report of L1 to a first network element;

[0032] Receiving the TA value of the target handover cell sent by the first network element, where the TA value is used for the terminal and the second network element to perform uplink and / or downlink transmission to complete the handover;

[0033] Wherein, the first network element is located in the source cell, and the second network element is located in the target handover cell.

[0034] Optionally, before sending the measurement report of L1 to the first network element, the method further includes:

[0035] Receiving the conditional handover pre-configuration sent by the first network element, where the conditional handover pre-configuration includes the relevant configurations of at least one handover candidate cell.

[0036] Optionally, the first network element is a first DU, the second network element is a second DU, and the first DU and the second DU are connected to the CU.

[0037] In a third aspect, a communication processing method is provided, which is applied to a second network element and includes:

[0038] Receiving the TA value of the target handover cell sent by the first network element, where the TA value is used for the terminal and the second network element to perform uplink and / or downlink transmission to complete the handover;

[0039] Wherein, the first network element is located in the source cell, and the second network element is located in the target handover cell.

[0040] Optionally, the method further includes:

[0041] Sending the power information of the handover candidate cell to the first network element.

[0042] Optionally, the method further includes:

[0043] If it is determined that the scheduling of correct data transmission is successful, it is determined that the handover of the terminal is successful, or it is determined that the handover of the terminal is successful through a dedicated PRACH message;

[0044] Sending a third piece of information, where the third piece of information is used to indicate that the handover of the terminal is successful.

[0045] Optionally, the first network element is a first DU, the second network element is a second DU, and the first DU and the second DU are connected to the CU.

[0046] In a fourth aspect, a communication processing apparatus is provided, which is applied to a first network element and includes:

[0047] A first receiving module, configured to receive a measurement report of L1;

[0048] A first determining module, configured to determine a TA value of a target handover cell according to the measurement report of L1;

[0049] A first sending module, configured to send the TA value to a terminal and a second network element respectively, where the TA value is used for the terminal and the second network element to perform uplink and / or downlink transmission to complete handover;

[0050] Wherein, the first network element is located in a source cell, and the second network element is located in a target handover cell.

[0051] In a fifth aspect, a communication processing apparatus is provided, which is applied to a terminal and includes:

[0052] A second sending module, configured to send a measurement report of L1 to a first network element;

[0053] A second receiving module, configured to receive a TA value of a target handover cell sent by the first network element, where the TA value is used for the terminal and the second network element to perform uplink and / or downlink transmission to complete handover;

[0054] Wherein, the first network element is located in a source cell, and the second network element is located in a target handover cell.

[0055] In a sixth aspect, a communication processing apparatus is provided, which is applied to a second network element and includes:

[0056] A fourth receiving module, configured to receive a TA value of a target handover cell sent by the first network element, where the TA value is used for a terminal and the second network element to perform uplink and / or downlink transmission to complete handover;

[0057] Wherein, the first network element is located in a source cell, and the second network element is located in a target handover cell.

[0058] In a seventh aspect, a communication device is provided, including a processor, a memory, and a program or instruction stored on the memory and executable on the processor, where when the program or instruction is executed by the processor, the steps of the method described in the first aspect or the second aspect or the third aspect are implemented.

[0059] In an eighth aspect, a readable storage medium is provided, where a program or instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the steps of the method described in the first aspect or the second aspect or the third aspect are implemented.

[0060] In this application, a first network element receives a measurement report of L1; the first network element determines a TA value of a target handover cell according to the measurement report of L1; the first network element sends the TA value to a terminal and a second network element respectively, and the TA value is used for the terminal and the second network element to perform uplink and / or downlink transmission to complete handover; wherein, the first network element is located in a source cell, and the second network element is located in the target handover cell. By simplifying the process, the delay in the handover process is reduced, and the handover success rate is improved. Description of the Drawings

[0061] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered to be a limitation of this application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0062] Figure 1 is a schematic diagram of a RACH-less cell handover scheme in the related art;

[0063] Figure 2 is one of the flowcharts of the communication processing method provided by the embodiment of this application;

[0064] Figure 3 is another flowchart of the communication processing method provided by the embodiment of this application;

[0065] Figure 4 is yet another flowchart of the communication processing method provided by the embodiment of this application;

[0066] Figure 5 is still another flowchart of the communication processing method provided by the embodiment of this application;

[0067] Figure 6 is one of the schematic diagrams of the communication processing device provided by the embodiment of this application;

[0068] Figure 7 is another schematic diagram of the communication processing device provided by the embodiment of this application;

[0069] Figure 8 is yet another schematic diagram of the communication processing device provided by the embodiment of this application;

[0070] Figure 9 is a schematic diagram of the communication device provided by the embodiment of this application. Detailed Embodiments

[0071] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0072] The term "including" and any of its variations in the specification and claims of the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily limit to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices. In addition, the use of "and / or" in the specification and claims means at least one of the connected objects. For example, A and / or B means including three cases: A alone, B alone, and both A and B exist.

[0073] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0074] Figure 1 is a RACH-less cell handover scheme.

[0075] Currently, there are the following problems in the RACH-less cell handover of LTM:

[0076] 1) In the process of obtaining the Timing Advance (TA), it is necessary to obtain the TA from the target cells of all target Distribution Units (DUs) through the Physical Random Access Channel (PRACH). At this time, when the terminal is transmitting data in the source cell and needs to switch to the target cell to send the PRACH, there are cases of misdetection and false detection of the PRACH, resulting in incorrect TA calculation;

[0077] 2) The TA calculation is implemented at the physical layer of the DU in the target cell, and then the TA is transmitted through the interface interaction between base stations, resulting in high latency and complexity.

[0078] 3) The RACH resource allocation for TA calculation and the uplink grant for RACH-LESS scheduling in the Media Access Control (MAC) layer of the target cell also need to be transmitted through the XN interface between the source DU and the destination DU, with excessive latency, resulting in a late handover and handover failure.

[0079] 4) The target cell allocates uplink resources for scheduling authorization in the source cell, which involves the system time synchronization problem between the source cell and the target cell.

[0080] See Figure 2 , the embodiments of the present application provide a communication processing method, which is applied to a first network element, and the specific steps include: Step 201, Step 202, and Step 203.

[0081] Step 201: Receive the measurement report of L1;

[0082] Step 202: Determine the TA value of the handover target cell according to the measurement report of L1;

[0083] Step 203: Send the TA value to the terminal and the second network element respectively, and the TA value is used for the terminal and the second network element to perform uplink and / or downlink transmission to complete the handover;

[0084] Wherein, the first network element is located in the source cell, and the second network element is located in the handover target cell.

[0085] In an embodiment of the present application, determining the TA value of the handover target cell according to the measurement report of L1 includes:

[0086] According to the measurement report of L1, obtain the path loss of the source cell and the path loss of the handover candidate cell;

[0087] Calculate the theoretical TA value of the source cell according to the path loss of the source cell;

[0088] Calculate the spatial characteristic factor according to the theoretical TA value of the source cell and the actual TA value of the source cell;

[0089] Calculate the theoretical TA value of the handover candidate cell according to the path loss of the handover candidate cell;

[0090] Calculate the actual TA value of the handover candidate cell according to the theoretical TA value of the handover candidate cell and the spatial characteristic factor;

[0091] Determine the TA value of the handover target cell according to the actual TA value of the handover candidate cell and the selected handover target cell.

[0092] In an embodiment of the present application, the method further includes:

[0093] Select a target cell to be switched according to preset conditions;

[0094] Among them, the selection conditions include:

[0095] Prioritize selecting neighboring cells in the low-frequency band and with a high base power of the cell as handover candidate cells, and select the cell with a small TA value from the handover candidate cells as the target cell for handover;

[0096] Or, prioritize selecting neighboring cells with a large coverage area as handover candidate cells, and select the cell with a small TA value from the handover candidate cells as the target cell for handover.

[0097] In an implementation manner of this application, before receiving the measurement report of L1, the method further includes:

[0098] Obtain the power information of the handover candidate cells.

[0099] For example, the power information of the handover candidate cells includes but is not limited to the base power of the handover candidate cells. For example, the power of the Secondary Synchronization Signal (SSS).

[0100] Optionally, in the XN establishment process and the XN configuration update process, add a new Information Element (IE). For example, this IE carries the cell base reference signal power information of the serving cell and neighboring cells.

[0101] In an implementation manner of this application, sending the TA value to the terminal includes:

[0102] Send a first piece of information to the terminal, and the first piece of information is used to indicate the target cell for handover and / or trigger the terminal to perform uplink and / or downlink data transmission in the target cell for handover.

[0103] In an implementation manner of this application, the first piece of information includes at least one of the following: target cell for handover indication, TA value of the target cell for handover.

[0104] In an implementation manner of this application, sending the TA value to a second network element includes:

[0105] Send a second piece of information to the second network element, and the second piece of information is used to indicate the TA value of the target cell for handover, and / or trigger uplink and / or downlink resource pre-authorization in the target cell for handover, and perform uplink and / or downlink data transmission.

[0106] In an implementation manner of this application, the TA value included in the uplink resource pre-authorization, the TA value is a relative value with respect to TAMAC CE.

[0107] It is understandable that the terminal sends the uplink message using the relative value of TA. The relative value adjustment is an adjustment based on the previous adjustment result, and the magnitude of the adjustment value is based on the increment of the previous adjustment.

[0108] Since the time advance has been configured for the terminal in the TAMAC CE, the best approach at this time is the relative value of TA, which can be based on the offset of the time advance already configured for the terminal in the TAMAC CE. Further, this relative value allows the base station to adjust the TA value based on other measurements.

[0109] In an embodiment of the present application, the first network element is the first DU (e.g., the source DU), the second network element is the second DU (the target DU), and the first DU and the second DU are connected to the CU.

[0110] In this embodiment, the latency of the handover process can be reduced and the handover success rate can be improved.

[0111] See Figure 3 , embodiments of the present application provide a communication processing method, which is applied to a terminal, and the specific steps include: step 301 and step 302.

[0112] Step 301: Send an L1 measurement report to the first network element;

[0113] Step 302: Receive the TA value of the handover target cell sent by the first network element, where the TA value is used for the terminal and the second network element to perform uplink and / or downlink transmission to complete the handover;

[0114] Wherein, the first network element is located in the source cell, and the second network element is located in the handover target cell.

[0115] In an embodiment of the present application, before sending the L1 measurement report to the first network element, the method further includes:

[0116] Receive the conditional handover pre-configuration sent by the first network element, where the conditional handover pre-configuration includes the relevant configurations of at least one handover candidate cell.

[0117] In an embodiment of the present application, the first network element is the first DU, the second network element is the second DU, and the first DU and the second DU are connected to the CU.

[0118] In this embodiment, the latency of the handover process can be reduced and the handover success rate can be improved.

[0119] See Figure 4 , embodiments of the present application provide a communication processing method, which is applied to the second network element, and the specific steps include: step 401.

[0120] Step 401: Receive the TA value of the target cell for handover sent by the first network element, where the TA value is used for the terminal and the second network element to perform uplink and / or downlink transmissions to complete the handover;

[0121] Among them, the first network element is located in the source cell, and the second network element is located in the target cell for handover.

[0122] In an implementation manner of the present application, the method further includes:

[0123] Send the power information of the handover candidate cell to the first network element.

[0124] In an implementation manner of the present application, the method further includes:

[0125] If it is determined that the scheduling of correct data transmission is successful, determine that the handover of the terminal is successful, or determine that the handover of the terminal is successful through a dedicated PRACH message;

[0126] Send the third information, where the third information is used to indicate that the handover of the terminal is successful.

[0127] In an implementation manner of the present application, the first network element is the first DU, the second network element is the second DU, and the first DU and the second DU are connected to the CU.

[0128] In this embodiment, the delay in the handover process can be reduced, and the handover success rate can be improved.

[0129] See Figure 5 , and the specific steps are as follows:

[0130] Step 0: The terminal receives conditional handover pre-configuration, which at least includes the relevant configuration of at least one handover candidate cell, so that the terminal sends an L1 measurement report according to the conditional handover pre-configuration;

[0131] Step 1: The first network element (DU1) in the source cell receives the L1 measurement report reported by the terminal, where the measurement report includes equivalent information such as RSRP and RSRQ;

[0132] Step 2: Perform handover decision and calculate the TA value of the target cell for handover;

[0133] Optionally, the step of calculating the TA value of the target cell for handover includes:

[0134] Step a: Calculate the path loss of the source cell and the path loss of the handover candidate cell;

[0135] Step b: Calculate the theoretical TA value of the source cell based on the path loss of the source cell;

[0136] Step c: Calculate the spatial characteristic factor based on the theoretical TA value of the source cell and the actual TA value of the source cell;

[0137] Path loss of the source cell: PL Scell = RS Scell Power - RSRP Scell ;

[0138] Theoretical TA value of the source cell L : TA LScell = PL Scell / Path loss characteristic of the Scell frequency point;

[0139] True TA value of the source cell R : Is the true cumulative value of the serving cell, denoted as TA RScell .

[0140] The coefficient between the theoretical and the true values is the spatial characteristic factor: β = TA RScell / TA LScell .

[0141] RSRP Scell Is used to represent the measured value of the serving cell in the measurement report.

[0142] RS Scell Power is used to represent the power value of the reference signal (such as the Secondary Synchronization Signal (SSS)) for switching the serving cell. It is consistent with the unit of RS Scell .

[0143] The path loss characteristic of the Scell frequency point is used to represent the propagation characteristic of electromagnetic waves in the air, such as how many dB of power loss per meter.

[0144] Step d: Calculate the theoretical TA value of the handover candidate cell based on the path loss of the handover candidate cell;

[0145] Step e: Calculate the true TA value of the handover candidate cell based on the theoretical TA value of the handover candidate cell and the spatial characteristic factor;

[0146] Path loss of the handover candidate cell: PL Ncell = RS Ncell Power - RSRP Ncell ;

[0147] Theoretical TA value of the handover candidate cell L : TA LNScell = PL Ncell / Path loss characteristic of the Ncell frequency point;

[0148] True TA value of the handover candidate cell R : Denoted as TA RNcell ;

[0149] TA RNcell = TAL NScell×β;

[0150] =(PL Ncell / Ncell frequency band path loss characteristic)×β;

[0151] =(PL Ncell / Ncell frequency band path loss characteristic)×(TA RScell / TA LScell );

[0152] =(PL Ncell / Ncell frequency band path loss characteristic)×(TA RScell / (PL Scell / Scell frequency band path loss characteristic));

[0153] Among them, RSRP Ncell is used to represent the measured value of the measurement report;

[0154] RS Ncell power is used to represent the reference signal (SSS) power value of the handover neighbor cell. It is consistent with the unit of RS Ncell ;

[0155] Ncell frequency band path loss characteristic is used to represent the propagation characteristic of electromagnetic waves in the air, such as how many dB of power loss per meter.

[0156] Step f: Determine the TA value of the handover target cell according to the true TA value of the handover candidate cell and the selected handover target cell.

[0157] Optionally, select the handover target cell according to a preset condition;

[0158] Among them, the preset conditions include:

[0159] Preferentially select neighbor cells in the low frequency band and with a high cell reference power as handover candidate cells, and select the cell with a small TA value as the handover target cell from the handover candidate cells;

[0160] Or, preferentially select neighbor cells with a large coverage area as handover candidate cells, and select the neighbor cell with a small TA value as the handover target cell from the handover candidate cells;

[0161] Among them, the coverage area of the neighbor cell is determined according to the neighbor cell power and the neighbor cell frequency band.

[0162] Step 3: The first network element sends the TA value of the handover target cell to the terminal;

[0163] For example, the first network element sends the first information to the terminal, and the first information is used to indicate the handover target cell and / or trigger the terminal to perform uplink and / or downlink data transmission in the handover target cell.

[0164] Optionally, the first information includes at least one of the following: a handover target cell indication (e.g., represented by "cellindicator"), and a TA value of the handover target cell (e.g., represented by "Timing Advance Command").

[0165] Optionally, the format of the first information is a Medium Access Control Control Element (MAC CE).

[0166] Step 4: The first network element sends the TA value of the handover target cell to the second network element (DU2) of the handover target cell.

[0167] Optionally, the first network element sends second information to the second network element through the F1 interface or the XN interface. The second information is used to indicate the TA value of the handover target cell and / or trigger uplink and / or downlink resource pre-authorization for the handover target cell to perform uplink and / or downlink data transmission.

[0168] Optionally, the second information includes the TA value of the handover target cell.

[0169] Optionally, the TA value included in the uplink resource pre-authorization is an absolute value, and the normal uplink authorization TA value is a relative value.

[0170] Step 5: The terminal and the second network element perform uplink and / or downlink data transmission through the TA value to complete the handover.

[0171] Optionally, the second network element obtains a handover success indication, which is used to trigger the stop of data transmission in the source cell.

[0172] Optionally, the ways for the second network element to obtain the handover success indication include:

[0173] Way 1: Using the correct scheduling of data transmission as a handover success flag.

[0174] Way 1 is a way actively triggered by the base station. The data response after the data sender and receiver receive the receive message. If this response is correctly received, it indicates that the data transmission is successful.

[0175] Normal correct scheduling of data transmission includes the following two parts: the data response after the data sender and receiver receive the receive message. If this response is correctly received, it indicates that the data transmission is successful, that is, the HARQ process.

[0176] Way 2: Identifying the handover success through a dedicated PRACH message.

[0177] Mode 2 is a mode initiated by the terminal actively. The terminal sends a dedicated PRACH message for uplink synchronization. The base station determines from this that the terminal is in the handover process and obtains some channel characteristics accordingly, and then can perform data scheduling normally.

[0178] In this embodiment, Figure 5 The shown process has the following effects compared with Figure 1 the shown process:

[0179] 1) The process is simple. The original process design requires at least 12 messages, while the new process only needs 5 messages to complete the handover, reducing the delay in the handover process and improving the handover success rate.

[0180] 2) Reducing the sending of redundant messages. In the original process, the source cell sends the TA value to all candidate target cells for the terminal. The new process simplifies it by only sending the TA value to the handover cell.

[0181] 3) More reliable TA calculation, avoiding the TA calculation error caused by the misdetection and false detection of PRACH in the prior art, which leads to the handover failure caused by the wrong selection of the target cell.

[0182] 4) A more concise and flexible handover success indication. Figure 1 In [reference], the data transmission triggered by the MAC CE uplink grant indicates the handover success. In this embodiment, the handover success is indicated by the downlink data transmission or the PRACH message, with lower delay.

[0183] See Figure 6 , an embodiment of the present application provides a communication processing device, which is applied to the first network element. The device 600 includes:

[0184] A first receiving module 601, configured to receive the measurement report of L1;

[0185] A first determining module 602, configured to determine the TA value of the handover target cell according to the measurement report of L1;

[0186] A first sending module 603, configured to send the TA value to the terminal and the second network element respectively, and the TA value is used for the terminal and the second network element to perform uplink and / or downlink transmission to complete the handover;

[0187] Wherein, the first network element is located in the source cell, and the second network element is located in the handover target cell.

[0188] In an implementation manner of the present application, the first determining module 602 is further configured to:

[0189] According to the measurement report of L1, obtain the path loss of the source cell and the path loss of the handover candidate cell;

[0190] Calculate the theoretical TA value of the source cell according to the path loss of the source cell;

[0191] Calculate the spatial characteristic factor according to the theoretical TA value of the source cell and the actual TA value of the source cell;

[0192] Calculate the theoretical TA value of the handover candidate cell according to the path loss of the handover candidate cell;

[0193] Calculate the actual TA value of the handover candidate cell according to the theoretical TA value of the handover candidate cell and the spatial characteristic factor;

[0194] Determine the TA value of the handover target cell according to the actual TA value of the handover candidate cell and the selected handover target cell.

[0195] In an implementation manner of the present application, the device further includes:

[0196] A selection module, configured to select a handover target cell according to a preset condition;

[0197] Wherein, the selection condition includes:

[0198] Preferably select an adjacent cell with a low frequency band and a high cell reference power as a handover candidate cell, and select a cell with a small TA value from the handover candidate cells as the handover target cell;

[0199] Or, preferably select an adjacent cell with a large coverage area as a handover candidate cell, and select a cell with a small TA value from the handover candidate cells as the handover target cell.

[0200] In an implementation manner of the present application, the device further includes:

[0201] An acquisition module, configured to acquire the power information of the handover candidate cell.

[0202] In an implementation manner of the present application, the first sending module 603 is further configured to:

[0203] Send a first message to the terminal, where the first message is used to indicate the handover target cell and / or trigger the terminal to perform uplink and / or downlink data transmission in the handover target cell.

[0204] In an implementation manner of the present application, the first message includes at least one of the following: a handover target cell indication, the TA value of the handover target cell.

[0205] In an implementation manner of the present application, the first sending module 603 is further configured to:

[0206] Send a second piece of information to the second network element, where the second piece of information is used to indicate the TA value of the handover target cell, and / or trigger the handover target cell to perform uplink and / or downlink resource pre-authorization, and perform uplink and / or downlink data transmission.

[0207] In an embodiment of the present application, the TA value of the handover target cell included in the uplink resource pre-authorization is a relative value relative to the TAMAC CE.

[0208] In an embodiment of the present application, the first network element is a first DU, the second network element is a second DU, and the first DU and the second DU are connected to the CU.

[0209] The device provided by the embodiment of the present application can implement Figure 2 each process implemented by the method embodiment shown, and achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0210] See Figure 7 , an embodiment of the present application provides a communication processing device, which is applied to a terminal. The device 700 includes:

[0211] A second sending module 701, configured to send an L1 measurement report to a first network element;

[0212] A second receiving module 702, configured to receive the TA value of the handover target cell sent by the first network element, where the TA value is used for the terminal and the second network element to perform uplink and / or downlink transmission to complete the handover;

[0213] Wherein, the first network element is located in the source cell, and the second network element is located in the handover target cell.

[0214] In an embodiment of the present application, the device further includes:

[0215] A third receiving module, configured to receive the conditional handover pre-configuration sent by the first network element, where the conditional handover pre-configuration includes the relevant configurations of at least one handover candidate cell.

[0216] In an embodiment of the present application, the first network element is a first DU, the second network element is a second DU, and the first DU and the second DU are connected to the CU.

[0217] The device provided by the embodiment of the present application can implement Figure 3 each process implemented by the method embodiment shown, and achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0218] See Figure 8 , an embodiment of the present application provides a communication processing device, which is applied to a second network element. The device 800 includes:

[0219] A fourth receiving module 801, configured to receive the TA value of the handover target cell sent by the first network element, where the TA value is used for the terminal and the second network element to perform uplink and / or downlink transmission to complete the handover;

[0220] Wherein, the first network element is located in the source cell, and the second network element is located in the handover target cell.

[0221] In an implementation manner of the present application, the apparatus further includes:

[0222] A third sending module, configured to send the power information of the handover candidate cell to the first network element.

[0223] In an implementation manner of the present application, the apparatus further includes:

[0224] A second determining module, configured to determine that the terminal handover is successful if it is determined that the scheduling of correct data transmission is correct, or determine that the terminal handover is successful through a dedicated PRACH message;

[0225] A fourth sending module, configured to send third information, where the third information is used to indicate that the terminal handover is successful.

[0226] In an implementation manner of the present application, the first network element is a first DU, the second network element is a second DU, and the first DU and the second DU are connected to a CU.

[0227] The apparatus provided by the embodiments of the present application can implement Figure 4 each process implemented by the method embodiments shown, and achieve the same technical effects. To avoid repetition, details are not described here again.

[0228] As Figure 9 shown, an embodiment of the present application further provides a communication device 900, including a processor 901, a memory 902, a program or instruction stored on the memory 902 and executable on the processor 901, where when the program or instruction is executed by the processor 901, it implements the above Figure 2 or Figure 3 or Figure 4 each process of the method embodiments shown, and can achieve the same technical effects. To avoid repetition, details are not described here again.

[0229] An embodiment of the present application further provides a readable storage medium, where a program or instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, it implements the above Figure 2 or Figure 3 or Figure 4 each process of the method embodiments shown, and can achieve the same technical effects. To avoid repetition, details are not described here again.

[0230] Among them, the processor is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs, etc.

[0231] The steps of the method or algorithm described in combination with the disclosed content of the present application can be implemented in a hardware manner or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, and the software modules can be stored in RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disks, removable hard disks, read-only optical discs, or any other form of storage medium well-known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be carried in an ASIC. In addition, the ASIC can be carried in the core network interface device. Of course, the processor and the storage medium can also exist as discrete components in the core network interface device.

[0232] Those skilled in the art should be able to realize that in one or more of the above examples, the functions described in the present application can be implemented by hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. The computer-readable medium includes computer storage media and communication media, where the communication media includes any medium that facilitates the transmission of a computer program from one place to another. The storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0233] The specific embodiments described above have further elaborated on the purpose, technical solution, and beneficial effects of the present application. It should be understood that the above is only the specific embodiments of the present application and is not used to limit the protection scope of the present application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solution of the present application should be included in the protection scope of the present application.

[0234] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the embodiments of the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the embodiments of the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0235] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows 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 the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0236] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing devices to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device that implements the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0237] These computer program instructions can also be loaded onto a computer or other programmable data processing devices, such that a series of operation steps are executed on the computer or other programmable devices to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable devices provide steps for implementing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0238] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

1. A communication processing method, applied to a first network element, characterized in that, Including: Measurement reports of the receiving layer 1; Determining the Timing Advance (TA) value of the handover target cell according to the measurement reports of the said layer 1; Sending the said TA value to the terminal and the second network element respectively, where the TA value is used for the terminal and the second network element to perform uplink and / or downlink transmission to complete the handover; Wherein, the first network element is located in the source cell, and the second network element is located in the handover target cell.

2. The method according to claim 1, wherein Determining the TA value of the handover target cell according to the measurement reports of the said layer 1 includes: Obtaining the path loss of the source cell and the path loss of the handover candidate cell according to the measurement reports of the said layer 1; Calculating the theoretical TA value of the source cell according to the path loss of the source cell; Calculating the spatial characteristic factor according to the theoretical TA value of the source cell and the actual TA value of the source cell; Calculating the theoretical TA value of the handover candidate cell according to the path loss of the handover candidate cell; Calculating the actual TA value of the handover candidate cell according to the theoretical TA value of the handover candidate cell and the said spatial characteristic factor; Determining the TA value of the handover target cell according to the actual TA value of the handover candidate cell and the selected handover target cell.

3. The method according to claim 2, wherein The method further includes: Selecting the handover target cell according to preset conditions; Wherein, the selection conditions include: Preferably selecting the neighboring cell with a low frequency band and a high cell reference power as the handover candidate cell, and selecting the neighboring cell with a small TA value from the handover candidate cells as the handover target cell; Or, preferably selecting the neighboring cell with a large coverage area as the handover candidate cell, and selecting the cell with a small TA value from the handover candidate cells as the handover target cell.

4. The method according to claim 1, characterized in that Before receiving the measurement reports of the said layer 1, the method further includes: Obtaining the power information of the handover candidate cell.

5. The method according to claim 1, wherein Sending the said TA value to the terminal includes: Sending the first information to the terminal, where the first information is used to indicate the handover target cell and / or trigger the terminal to perform uplink and / or downlink data transmission in the handover target cell.

6. The method according to claim 5, wherein The first information includes at least one of the following: handover target cell indication, TA value of the handover target cell.

7. The method according to claim 1, wherein Sending the said TA value to the second network element includes: Sending the second information to the second network element, where the second information is used to indicate the TA value of the handover target cell, and / or trigger the handover target cell to perform uplink and / or downlink resource pre-authorization and perform uplink and / or downlink data transmission.

8. The method according to claim 7, wherein The TA value included in the uplink resource pre-authorization is the relative value of the TA value with respect to the TA Medium Access Control Control Element (MAC CE).

9. The method according to claim 1, characterized in that The first network element is the first Distributed Unit (DU), the second network element is the second DU, and the first DU and the second DU are connected to the Central Unit (CU).

10. A communication processing method, applied to a terminal, characterized in that Including: Sending the measurement reports of L1 to the first network element; Receiving the TA value of the handover target cell sent by the first network element, where the TA value is used for the terminal and the second network element to perform uplink and / or downlink transmission to complete the handover; Wherein, the first network element is located in the source cell, and the second network element is located in the handover target cell.

11. The method according to claim 10, wherein Before sending the measurement reports of L1 to the first network element, the method further includes: Receive the conditional handover pre-configuration sent by the first network element, where the conditional handover pre-configuration includes the relevant configurations of at least one handover candidate cell.

12. The method according to claim 10, wherein The first network element is the first DU, the second network element is the second DU, and the first DU and the second DU are connected to the CU.

13. A communication processing method, applied to a second network element, characterized in that, It includes: Receive the TA value of the handover target cell sent by the first network element, where the TA value is used for the terminal and the second network element to perform uplink and / or downlink transmissions to complete the handover; Wherein, the first network element is located in the source cell, and the second network element is located in the handover target cell.

14. The method according to claim 13, characterized in that, The method further includes: Send the power information of the handover candidate cell to the first network element.

15. The method according to claim 13, characterized in that, The method further includes: If it is determined that the scheduling of correct data transmission is successful, determine that the terminal handover is successful, or determine that the terminal handover is successful through a dedicated PRACH message; Send the third information, where the third information is used to indicate that the terminal handover is successful.

16. The method according to claim 13, characterized in that The first network element is the first DU, the second network element is the second DU, and the first DU and the second DU are connected to the CU.

17. A communication processing device, applied to a first network element, characterized in that, It includes: A first receiving module, configured to receive the measurement report of L1; A first determining module, configured to determine the TA value of the handover target cell according to the measurement report of L1; A first sending module, configured to send the TA value to the terminal and the second network element respectively, where the TA value is used for the terminal and the second network element to perform uplink and / or downlink transmissions to complete the handover; Wherein, the first network element is located in the source cell, and the second network element is located in the handover target cell.

18. A communication processing device, applied to a terminal, characterized in that, It includes: A second sending module, configured to send the measurement report of L1 to the first network element; A second receiving module, configured to receive the TA value of the handover target cell sent by the first network element, where the TA value is used for the terminal and the second network element to perform uplink and / or downlink transmissions to complete the handover; Wherein, the first network element is located in the source cell, and the second network element is located in the handover target cell.

19. A communication processing device is applied to a second network element, and is characterized in that It includes: A fourth receiving module, configured to receive the TA value of the handover target cell sent by the first network element, where the TA value is used for the terminal and the second network element to perform uplink and / or downlink transmissions to complete the handover; Wherein, the first network element is located in the source cell, and the second network element is located in the handover target cell.

20. A communication device, characterized in that, It includes a processor, a memory, and a program or instruction stored on the memory and executable on the processor. When the program or instruction is executed by the processor, the steps of the method according to any one of claims 1 to 16 are implemented.

21. A readable storage medium, characterized in that, The program or instruction is stored on the readable storage medium. When the program or instruction is executed by the processor, the steps of the method according to any one of claims 1 to 16 are implemented.

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