Communication processing method and apparatus, and device and readable storage medium

Abstract

Provided in the embodiments of the present disclosure are a communication processing method and apparatus, and a device and a readable storage medium. The method comprises: receiving a measurement report; determining a TA value of a handover target cell on the basis of the measurement report; and sending the TA value to both a terminal and a second network element, wherein the TA value is used by the terminal and the second network element to perform uplink and / or downlink transmission so as to complete a handover, and the first network element is located in a handover original cell, and the second network element is located in the handover target cell.

Description

Communication processing method, device, equipment and readable storage medium

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese Patent Application No. 202311768500.5 filed in China on December 21, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The embodiments of the present disclosure relate to the field of communication technology, and in particular to a communication processing method, apparatus, device, and readable storage medium. Background Art

[0004] Handover is a crucial process in wireless communication systems. To ensure handover reliability and low latency, various handover enhancement solutions have been developed, including Conditional Handover (CHO), Layer 1 / L2 Triggered Mobility (LTM), and LTM-based random access channel-less (RACH-less) cell handover solutions. Reducing handover latency and improving handover success rates are pressing challenges. Summary of the Invention

[0005] The embodiments of the present disclosure provide a communication processing method, apparatus, device, and readable storage medium to solve the problem of how to reduce the delay of the switching process and improve the switching success rate.

[0006] In a first aspect, a communication processing method is provided, applied to a first network element, including:

[0007] receiving an L1 measurement report and / or an L3 measurement report;

[0008] Determine the TA value of the handover target cell according to the L1 measurement report and / or the L3 measurement report;

[0009] Sending the TA value to the terminal and the second network element respectively, where the TA value is used by the terminal and the second network element for uplink and / or downlink transmission to complete the handover;

[0010] The first network element is located in the switching source cell, and the second network element is located in the switching target cell.

[0011] Optionally, determining the TA value of the handover target cell according to the L1 measurement report and / or the L3 measurement report includes:

[0012] Obtaining the original cell path loss and the handover candidate cell path loss according to the L1 measurement report and / or the L3 measurement report;

[0013] Calculate the original cell theoretical TA value according to the original cell path loss;

[0014] Calculating a spatial characteristic factor according to the theoretical TA value of the original cell and the actual TA value of the original cell;

[0015] Calculating a theoretical TA value of the handover candidate cell according to the handover candidate cell path loss;

[0016] 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;

[0017] The TA value of the handover target cell is determined according to the actual TA value of the handover candidate cell and the selected handover target cell.

[0018] Optionally, the method further includes:

[0019] According to the preset conditions, select the target cell for handover;

[0020] The selection conditions include:

[0021] Prioritize neighboring cells with low frequency bands and / or high cell reference power as candidate cells for handover, and select a cell with a small TA value from the candidate cells for handover as the target cell for handover;

[0022] Alternatively, a neighboring cell with a large coverage area is preferentially selected as a candidate handover cell, and a cell with a small TA value is selected from the candidate handover cells as a target handover cell.

[0023] Optionally, before receiving the L1 measurement report and / or the L3 measurement report, the method further includes:

[0024] Get the power information of the candidate cell for handover.

[0025] Optionally, sending the TA value to the terminal includes:

[0026] First information is sent to the terminal, where the first information is used to indicate a handover target cell and / or trigger the terminal to perform uplink and / or downlink data transmission in the handover target cell.

[0027] Optionally, the first information includes at least one of the following: a switching target cell indication, and a TA value of the switching target cell.

[0028] Optionally, sending the TA value to the second network element includes:

[0029] Sending second information to the second network element, where the second information is used to indicate at least one of the following:

[0030] TA value of the target cell to be switched;

[0031] Switch type;

[0032] The data volume indication information triggering the handover target cell to perform uplink and / or downlink resource pre-authorization is used to allocate uplink and / or downlink data transmission resource related information.

[0033] Optionally, the TA value of the handover target cell included in the uplink resource pre-grant is a relative value or an absolute value relative to a TA MAC CE.

[0034] 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 a CU.

[0035] In a second aspect, a communication processing method is provided, which is applied to a terminal, including:

[0036] Sending the L1 measurement report and / or the L3 measurement report to the first network element;

[0037] receiving a TA value of a handover target cell and / or resource scheduling information allocated by the target cell and / or PRACH information sent by the first network element; the TA value and / or the resource scheduling information are used by the terminal and the second network element to perform uplink and / or downlink transmission to complete the handover, and the PRACH information is used by the second network element to indicate the completion of the handover;

[0038] The first network element is located in the switching source cell, and the second network element is located in the switching target cell.

[0039] Optionally, before sending the L1 measurement report and / or the L3 measurement report to the first network element, the method further includes:

[0040] Receive a conditional handover pre-configuration sent by the first network element, where the conditional handover pre-configuration includes relevant configuration of at least one handover candidate cell.

[0041] 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 a CU.

[0042] According to a third aspect, a communication processing method is provided, which is applied to a second network element and includes:

[0043] receiving a TA value of a handover target cell sent by the first network element, and / or data amount indication information for triggering uplink and / or downlink resource pre-authorization of the handover target cell, wherein the TA value is used for uplink and / or downlink transmission between the terminal and the second network element to complete the handover;

[0044] The first network element is located in the switching source cell, and the second network element is located in the switching target cell.

[0045] Optionally, the method further includes:

[0046] Send power information of the handover candidate cell to the first network element.

[0047] Optionally, the method further includes:

[0048] Send scheduling information for uplink and downlink data transmission of the switching cell, or PRACH information, to the first network element.

[0049] Optionally, the method further includes:

[0050] If it is determined that the scheduling data is correctly transmitted, determining that the terminal handover is successful; and / or determining that the terminal handover is successful through a dedicated PRACH message;

[0051] Receive third information, where the third information is used to indicate that the terminal is successfully switched.

[0052] 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 a CU.

[0053] In a fourth aspect, a communication processing device is provided, applied to a first network element, including:

[0054] A first receiving module, configured to receive an L1 measurement report and / or an L3 measurement report;

[0055] A first determining module is configured to determine a TA value of a handover target cell according to the L1 measurement report and / or the L3 measurement report;

[0056] 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 by the terminal and the second network element to perform uplink and / or downlink transmission to complete handover;

[0057] The first network element is located in the switching source cell, and the second network element is located in the switching target cell.

[0058] In a fifth aspect, a communication processing device is provided, applied to a terminal, including:

[0059] A second sending module, configured to send the L1 measurement report and / or the L3 measurement report to the first network element;

[0060] A second receiving module is configured to receive a TA value of a handover target cell and / or resource scheduling information allocated by the target cell and / or PRACH information sent by the first network element; the TA value and / or the resource scheduling information are used by the terminal and the second network element for uplink and / or downlink transmission to complete the handover; or are used by the second network element to instruct the completion of the handover through the PRACH information;

[0061] The first network element is located in the switching source cell, and the second network element is located in the switching target cell.

[0062] In a sixth aspect, a communication processing device is provided, applied to a second network element, including:

[0063] a fourth receiving module, configured to receive a TA value of a handover target cell sent by the first network element, and / or data amount indication information for triggering the handover target cell to perform uplink and / or downlink resource pre-authorization, wherein the TA value is used for uplink and / or downlink transmission between the terminal and the second network element to complete the handover;

[0064] The first network element is located in the switching source cell, and the second network element is located in the switching target cell.

[0065] In the seventh aspect, a communication device is provided, comprising a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method described in the first aspect, the second aspect, or the third aspect.

[0066] In an eighth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect, the second aspect, or the third aspect are implemented.

[0067] In the present disclosure, a first network element receives an L1 measurement report and / or an L3 measurement report; the first network element determines a TA value of a switching target cell based on the L1 measurement report and / or the L3 measurement report; the first network element sends the TA value to a terminal and a second network element respectively, and the TA value is used by the terminal and the second network element for uplink and / or downlink transmission to complete the switching; wherein the first network element is located in the original switching cell, and the second network element is located in the target switching cell, thereby simplifying the process, thereby reducing the delay of the switching process and improving the switching success rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present disclosure. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0069] FIG1 is a schematic diagram of a RACH-less cell handover solution in the related art;

[0070] FIG2 is a flow chart of a communication processing method according to an embodiment of the present disclosure;

[0071] FIG3 is a second flowchart of the communication processing method provided by an embodiment of the present disclosure;

[0072] FIG4 is a third flowchart of the communication processing method provided by an embodiment of the present disclosure;

[0073] FIG5 is a fourth flowchart of the communication processing method provided by an embodiment of the present disclosure;

[0074] FIG6 is a schematic diagram of a communication processing device according to an embodiment of the present disclosure;

[0075] FIG7 is a second schematic diagram of a communication processing device provided by an embodiment of the present disclosure;

[0076] FIG8 is a third schematic diagram of a communication processing device provided by an embodiment of the present disclosure;

[0077] FIG9 is a schematic diagram of a communication device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0078] The following will clearly and completely describe the technical solutions in the embodiments of the present disclosure in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present disclosure without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0079] The term "comprise" and any variations thereof in the specification and claims of the present disclosure are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to the process, method, product, or apparatus. In addition, the use of "and / or" in the specification and claims to indicate at least one of the connected objects, such as A and / or B, means that A alone, B alone, and both A and B are included.

[0080] In the embodiments of the present disclosure, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present disclosure should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0081] Figure 1 shows the RACH-less cell handover solution.

[0082] Currently, LTM RACH-less cell handover has the following problems:

[0083] 1) The Timing Advance (TA) acquisition process requires using the Physical Random Access Channel (PRACH) to obtain the TA from the target cells of all target distributed units (DUs). At this point, the terminal is performing data transmission in the original cell and needs to switch to the target cell to send PRACH. This can cause PRACH misdetection and false detection, leading to TA calculation errors.

[0084] 2) TA calculation is implemented at the physical layer of the DU of the target cell, and then TA is transmitted through the interface interaction between base stations, resulting in high latency and complexity.

[0085] 3) The RACH resource allocation for TA calculation and the uplink grant for RACH-LESS scheduling at the media access control (MAC) layer of the target cell also need to be transmitted through the XN interface between the original DU and the target DU. This delay is too large, resulting in handover being too late and causing handover failure.

[0086] 4) The target cell allocates uplink resources and performs scheduling authorization in the original cell, which involves the system time synchronization problem between the original cell and the target cell.

[0087] 2 , an embodiment of the present disclosure provides a communication processing method, which is applied to a first network element. The specific steps include: step 201 , step 202 , and step 203 .

[0088] Step 201: Receive a layer 1 (Layer 1, L1) measurement report and / or a layer 3 (Layer 3, L3) measurement report;

[0089] Step 202: Determine the TA value of the handover target cell according to the L1 measurement report and / or the L3 measurement report;

[0090] Step 203: Send the TA value to the terminal and the second network element respectively, where the TA value is used by the terminal and the second network element for uplink and / or downlink transmission to complete the handover;

[0091] The first network element is located in the switching source cell, and the second network element is located in the switching target cell.

[0092] In one implementation manner, the original cell may also be expressed as a source cell.

[0093] In one implementation, the original cell to be switched may also be expressed as the original cell or the source cell.

[0094] In one implementation, the TA value is used by the terminal and the second network element to perform uplink and / or downlink air interface data transmission to complete the handover.

[0095] In one embodiment, the communication processing method includes:

[0096] The first network element receives a measurement report of layer 1;

[0097] The first network element determines a timing advance TA value of a handover target cell according to the layer 1 measurement report;

[0098] The first network element sends the TA value to the terminal and the second network element respectively, where the TA value is used by the terminal and the second network element for uplink and / or downlink transmission to complete the handover;

[0099] The first network element is located in the original handover cell (or expressed as the handover source cell, or the source cell), and the second network element is located in the target handover cell.

[0100] In one embodiment, the communication processing method includes:

[0101] The first network element receives a measurement report (such as a layer 1 or layer 3 measurement report);

[0102] The first network element determines a timing advance TA value of a handover target cell according to the measurement report;

[0103] The first network element sends the TA value to the terminal and the second network element respectively, where the TA value is used by the terminal and the second network element for uplink and / or downlink transmission to complete the handover;

[0104] The first network element is located in the switching source cell, and the second network element is located in the switching target cell.

[0105] In one embodiment of the present disclosure, determining the TA value of the handover target cell according to the L1 measurement report and / or the L3 measurement report includes:

[0106] Obtaining the original cell path loss and the handover candidate cell path loss according to the L1 measurement report and / or the L3 measurement report;

[0107] Calculate the original cell theoretical TA value according to the original cell path loss;

[0108] Calculating a spatial characteristic factor according to the theoretical TA value of the original cell and the actual TA value of the original cell;

[0109] Calculating a theoretical TA value of the handover candidate cell according to the handover candidate cell path loss;

[0110] 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;

[0111] The TA value of the handover target cell is determined according to the actual TA value of the handover candidate cell and the selected handover target cell.

[0112] In one embodiment of the present disclosure, the method further comprises:

[0113] According to the preset conditions, select the target cell for handover;

[0114] The selection conditions include:

[0115] Prioritize neighboring cells with low frequency bands and / or high cell reference power as candidate cells for handover, and select a cell with a small TA value from the candidate cells for handover as the target cell for handover;

[0116] Alternatively, a neighboring cell with a large coverage area is preferentially selected as a candidate handover cell, and a cell with a small TA value is selected from the candidate handover cells as a target handover cell.

[0117] In one implementation, a neighboring cell with a low frequency band and high cell reference power is preferentially selected as a handover candidate cell, and a neighboring cell with a small TA value is selected from the handover candidate cells as the handover target cell.

[0118] In one embodiment of the present disclosure, before receiving the L1 measurement report and / or the L3 measurement report, the method further includes:

[0119] Get the power information of the candidate cell for handover.

[0120] For example, the power information of the handover candidate cell includes but is not limited to the reference power of the handover candidate cell, for example, the power of the Secondary Synchronization Signal (SSS).

[0121] Optionally, a new information element (IE) is added in the XN establishment process and the XN configuration update process. For example, the IE carries the cell-reference signal power information of the serving cell and the neighboring cell.

[0122] In one embodiment of the present disclosure, sending the TA value to the terminal includes:

[0123] First information is sent to the terminal, where the first information is used to indicate a handover target cell and / or trigger the terminal to perform uplink and / or downlink data transmission in the handover target cell.

[0124] In an embodiment of the present disclosure, the first information includes at least one of the following: a handover target cell indication, and a TA value of the handover target cell.

[0125] In one embodiment of the present disclosure, sending the TA value to the second network element includes:

[0126] Sending second information to the second network element, where the second information is used to indicate at least one of the following:

[0127] TA value of the target cell to be switched;

[0128] Switch type;

[0129] The data volume indication information triggering the handover target cell to perform uplink and / or downlink resource pre-authorization is used to allocate uplink and / or downlink data transmission resource related information.

[0130] In one embodiment, 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.

[0131] In one implementation, the transmission resources include time domain, frequency domain, etc.

[0132] In one embodiment of the present disclosure, the TA value of the handover target cell included in the uplink resource pre-grant is a relative value or an absolute value relative to the TA MAC CE. MAC CE refers to a Medium Access Control Control Element.

[0133] It is understandable that the terminal uses the relative value of TA when sending uplink messages. The relative value adjustment is based on the result of the last adjustment, and the size of the adjustment value is based on the increment of the last adjustment.

[0134] Because the timing advance is already configured for the terminal in the TA MAC CE, the best approach is to use a relative TA value. This value can be based on the offset of the timing advance already configured for the terminal in the TA MAC CE. Furthermore, this relative value allows the base station to adjust the TA value based on other measurements.

[0135] In one embodiment of the present disclosure, the first network element is a first DU (eg, original DU), the second network element is a second DU (target DU), and the first DU and the second DU are connected to a centralized unit (CU).

[0136] In this embodiment, the delay of the switching process can be reduced and the switching success rate can be improved.

[0137] 3 , an embodiment of the present disclosure provides a communication processing method, which is applied to a terminal. The specific steps include: step 301 and step 302 .

[0138] Step 301: Sending an L1 measurement report and / or an L3 measurement report to a first network element;

[0139] Step 302: Receive the TA value of the handover target cell and / or resource scheduling information allocated by the target cell and / or PRACH information sent by the first network element; the TA value and / or resource scheduling information are used by the terminal and the second network element for uplink and / or downlink transmission to complete the handover, and the PRACH information is used by the second network element to indicate the completion of the handover;

[0140] The first network element is located in the switching source cell, and the second network element is located in the switching target cell.

[0141] In one embodiment, the TA value is used for uplink and / or downlink transmission between the terminal and the second network element to complete the handover;

[0142] The first network element is located in the switching source cell, and the second network element is located in the switching target cell.

[0143] In one embodiment, the communication processing method includes:

[0144] The terminal sends an L1 measurement report to the first network element;

[0145] The terminal receives a TA value of a handover target cell sent by the first network element, where the TA value is used by the terminal and the second network element to perform uplink and / or downlink transmission to complete the handover;

[0146] The first network element is located in the original handover cell (or expressed as the handover source cell, or the source cell), and the second network element is located in the target handover cell.

[0147] In one embodiment of the present disclosure, before sending the L1 measurement report and / or the L3 measurement report to the first network element, the method further includes:

[0148] Receive a conditional handover pre-configuration sent by the first network element, where the conditional handover pre-configuration includes relevant configuration of at least one handover candidate cell.

[0149] In one embodiment of the present disclosure, 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.

[0150] In this embodiment, the delay of the switching process can be reduced and the switching success rate can be improved.

[0151] 4 , an embodiment of the present disclosure provides a communication processing method, which is applied to a second network element. The specific steps include: Step 401 .

[0152] Step 401: Receive a TA value of a handover target cell sent by a first network element, and / or data volume indication information for triggering uplink and / or downlink resource pre-authorization of the handover target cell, wherein the TA value is used for uplink and / or downlink transmission between the terminal and the second network element to complete the handover;

[0153] The first network element is located in the switching source cell, and the second network element is located in the switching target cell.

[0154] In one embodiment, the communication processing method includes:

[0155] The second network element receives a TA value of the handover target cell sent by the first network element, where the TA value is used for uplink and / or downlink transmission between the terminal and the second network element to complete the handover;

[0156] The first network element is located in the original handover cell (or expressed as the handover source cell, or the source cell), and the second network element is located in the target handover cell.

[0157] In one embodiment of the present disclosure, the method further comprises:

[0158] Send power information of the handover candidate cell to the first network element.

[0159] In one embodiment of the present disclosure, the method further comprises:

[0160] Send scheduling information for uplink and downlink data transmission of the switching cell, or PRACH information, to the first network element.

[0161] In one embodiment of the present disclosure, the method further comprises:

[0162] If it is determined that the scheduling data is correctly transmitted, determining that the terminal handover is successful; and / or determining that the terminal handover is successful through a dedicated PRACH message;

[0163] Receive third information, where the third information is used to indicate that the terminal is successfully switched.

[0164] In one implementation, the third information may refer to a PRACH message.

[0165] In one embodiment of the present disclosure, 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.

[0166] In this embodiment, the delay of the switching process can be reduced and the switching success rate can be improved.

[0167] Referring to Figure 5, the specific steps are as follows:

[0168] Step 0: The terminal receives a conditional handover pre-configuration, which includes at least one configuration related to a handover candidate cell, so that the terminal sends an L1 measurement report and / or an L3 measurement report according to the conditional handover pre-configuration;

[0169] Step 1: The first network element (DU1) of the original cell receives the L1 measurement report and / or L3 measurement report reported by the terminal, where the measurement report includes equivalent information such as Reference Signal Received Power (RSRP) and Reference Signal Received Quality (RSRQ);

[0170] Step 2: Handover decision and calculation of the TA value of the handover target cell;

[0171] Optionally, the step of calculating the TA value of the handover target cell includes:

[0172] Step a: Calculate the path loss of the original cell and the path loss of the candidate cell for handover;

[0173] Step b: Calculate the original cell theoretical TA value based on the original cell path loss;

[0174] Step c: Calculate the spatial characteristic factor based on the theoretical TA value of the original cell and the actual TA value of the original cell;

[0175] Original cell road loss: PL Scell =RS Scell Power-RSRP Scell ;

[0176] Original cell theoretical value TA L :TA LScell=PL Scell / Scell ​​frequency path loss characteristics;

[0177] The actual value of the original cell TA R : is the actual cumulative value of the serving cell, recorded as TA RScell .

[0178] The coefficient between theory and reality is the spatial characteristic factor: β = TA RScell / TA LScell .

[0179] RSRP Scell Used to indicate the serving cell measurement value in the measurement report.

[0180] RS Scell Power is used to indicate the power value of the reference signal (such as the Secondary Synchronization Signal (SSS)) of the handover serving cell. Scell The units are consistent.

[0181] The Scell ​​frequency path loss characteristic is used to indicate the propagation characteristics of electromagnetic waves in the air, such as the power loss per meter in dB.

[0182] Step d: Calculate the theoretical TA value of the candidate handover cell based on the path loss of the candidate handover cell;

[0183] Step e: Calculate the actual TA value of the handover candidate cell based on the theoretical TA value of the handover candidate cell and the spatial characteristic factors;

[0184] Path loss of candidate cell for handover: PL Ncell =RS Ncell Power-RSRP Ncell ;

[0185] Theoretical value of switching candidate cells TA L :TA LNScell =PL Ncell / Ncell frequency path loss characteristics;

[0186] Switch candidate cell actual value TA R :Recorded as TA RNcell ;

[0187] TA RNcell =TAL NScell ×β;

[0188] =(PL Ncell / Ncell frequency point path loss characteristic)×β;

[0189] =(PL Ncell / Ncell frequency point path loss characteristics)×(TARScell / TA LScell );

[0190] =(PL Ncell / Ncell frequency point path loss characteristics)×(TA RScell / (PL Scell / Scell ​​frequency point path loss characteristics)).

[0191] Among them, RSRP Ncell Used to indicate measurement values ​​reported in a measurement report;

[0192] RS Ncell Power is used to indicate the reference signal (SSS) power value of the handover neighboring cell. Ncell The units are consistent;

[0193] The Ncell frequency path loss characteristic is used to indicate the propagation characteristics of electromagnetic waves in the air, such as the power loss per meter in dB.

[0194] Step f: Determine the TA value of the handover target cell based on the actual TA value of the handover candidate cell and the selected handover target cell.

[0195] Optionally, selecting a handover target cell according to preset conditions;

[0196] The preset conditions include:

[0197] Prioritize neighboring cells with low frequency bands and / or high cell reference power as candidate cells for handover, and select a cell with a small TA value from the candidate cells for handover as the target cell for handover;

[0198] Alternatively, a neighboring cell with a large coverage area is preferentially selected as a candidate handover cell, and a neighboring cell with a small TA value is selected from the candidate handover cells as a target handover cell;

[0199] The coverage area of ​​the neighboring cell is determined according to the neighboring cell power and the neighboring cell frequency band.

[0200] Step 3: The first network element sends the TA value of the handover target cell to the terminal;

[0201] For example, the first network element sends first information to the terminal, where the first information is used to indicate a handover target cell and / or trigger the terminal to perform uplink and / or downlink data transmission in the handover target cell.

[0202] Optionally, the first information includes at least one of the following: a switching target cell indication (for example, represented by "cell indicator"), and a TA value of the switching target cell (for example, represented by "Timing Advance Command").

[0203] Optionally, the format of the first information is a Medium Access Control Control Element (MAC CE).

[0204] 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;

[0205] Optionally, the first network element sends second information to the second network element through the F1 interface or the XN interface, where the second information is used to indicate at least one of the following: the TA value of the switching target cell; the switching type; and data volume indication information that triggers the switching target cell to perform uplink and / or downlink resource pre-authorization, which is used to allocate uplink and / or downlink data transmission resource-related information to the switching target cell.

[0206] Optionally, the second information includes a TA value of the handover target cell.

[0207] Optionally, the TA value included in the uplink resource pre-authorization is an absolute value, and the TA value in the normal uplink authorization is a relative value.

[0208] Step 5: The terminal and the second network element perform uplink and / or downlink data transmission using the TA value to complete the handover;

[0209] Optionally, the second network element obtains a handover success indication, where the handover success indication is used to trigger stopping of data transmission in the original cell.

[0210] Optionally, the manner in which the second network element obtains the handover success indication includes:

[0211] Method 1: Use the correct data transmission as a handover success indicator;

[0212] Mode 1 is the base station's active triggering method. After the data sender and receiver receive the data response after receiving the receive message, if the response is correctly received, it means that the data transmission is successful.

[0213] Normal scheduling and correct data transmission include the following two parts: data transmission and data response after the receiver receives the receive message. If the response is correctly received, it means that the data transmission is successful, which is the Hybrid Automatic Repeat Request (HARQ) process.

[0214] Method 2: The handover success is identified through a dedicated PRACH message.

[0215] Mode 2 is initiated by the terminal. The terminal sends a dedicated PRACH message for uplink synchronization. The base station determines that the terminal is performing a handover process and obtains some channel characteristics based on this, and then can perform data scheduling normally.

[0216] In this embodiment, the process shown in FIG5 has the following effects compared with the process shown in FIG1:

[0217] 1) The process is simpler. The original process design required at least 12 messages, while the new process only requires 5 messages to complete the switch, reducing the delay of the switch process and improving the switch success rate.

[0218] 2) Reduce redundant message sending. The original process is that the original cell sends the TA value of all candidate target cells to the terminal. The new process is simplified to only send the TA value to the handover cell.

[0219] 3) More reliable TA calculation avoids handover failure caused by TA calculation errors and incorrect target cell selection caused by PRACH misdetection and false detection in related technologies.

[0220] 4) More streamlined and flexible handover success indication. In FIG1 , the handover success is indicated by triggering data transmission through MAC CE uplink authorization. In this embodiment, the handover success is indicated by downlink data transmission or PRACH message, which reduces the delay.

[0221] 6 , an embodiment of the present disclosure provides a communication processing device, which is applied to a first network element. The device 600 includes:

[0222] A first receiving module 601 is configured to receive an L1 measurement report and / or an L3 measurement report;

[0223] A first determining module 602 is configured to determine a TA value of a handover target cell according to the L1 measurement report and / or the L3 measurement report;

[0224] A first sending module 603 is configured to send the TA value to the terminal and the second network element respectively, where the TA value is used by the terminal and the second network element for uplink and / or downlink transmission to complete handover;

[0225] The first network element is located in the switching source cell, and the second network element is located in the switching target cell.

[0226] In one embodiment of the present disclosure, the first determining module 602 is further configured to:

[0227] Obtaining the original cell path loss and the handover candidate cell path loss according to the L1 measurement report and / or the L3 measurement report;

[0228] Calculate the original cell theoretical TA value according to the original cell path loss;

[0229] Calculating a spatial characteristic factor according to the theoretical TA value of the original cell and the actual TA value of the original cell;

[0230] Calculating a theoretical TA value of the handover candidate cell according to the handover candidate cell path loss;

[0231] 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;

[0232] The TA value of the handover target cell is determined according to the actual TA value of the handover candidate cell and the selected handover target cell.

[0233] In one embodiment of the present disclosure, the device further comprises:

[0234] A selection module is used to select a handover target cell according to preset conditions;

[0235] The selection conditions include:

[0236] Prioritize neighboring cells with low frequency bands and / or high cell reference power as candidate cells for handover, and select a cell with a small TA value from the candidate cells for handover as the target cell for handover;

[0237] Alternatively, a neighboring cell with a large coverage area is preferentially selected as a candidate handover cell, and a cell with a small TA value is selected from the candidate handover cells as a target handover cell.

[0238] In one embodiment of the present disclosure, the device further comprises:

[0239] The acquisition module is used to obtain power information of the handover candidate cell.

[0240] In one embodiment of the present disclosure, the first sending module 603 is further configured to:

[0241] First information is sent to the terminal, where the first information is used to indicate a handover target cell and / or trigger the terminal to perform uplink and / or downlink data transmission in the handover target cell.

[0242] In an embodiment of the present disclosure, the first information includes at least one of the following: a handover target cell indication, and a TA value of the handover target cell.

[0243] In one embodiment of the present disclosure, the first sending module 603 is further configured to:

[0244] Sending second information to the second network element, where the second information is used to indicate at least one of the following:

[0245] TA value of the target cell to be switched;

[0246] Switch type;

[0247] The data volume indication information triggering the handover target cell to perform uplink and / or downlink resource pre-authorization is used to allocate uplink and / or downlink data transmission resource related information.

[0248] In one embodiment of the present disclosure, the TA value of the handover target cell included in the uplink resource pre-grant is a relative value or an absolute value relative to the TA MAC CE.

[0249] In one embodiment of the present disclosure, 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.

[0250] The device provided in the embodiment of the present disclosure can implement each process implemented by the method embodiment shown in Figure 2 and achieve the same technical effect. To avoid repetition, it will not be described here.

[0251] 7 , an embodiment of the present disclosure provides a communication processing device, which is applied to a terminal. The device 700 includes:

[0252] The second sending module 701 is configured to send an L1 measurement report and / or an L3 measurement report to the first network element;

[0253] The second receiving module 702 is configured to receive a TA value of a handover target cell and / or resource scheduling information allocated by the target cell and / or PRACH information sent by the first network element; the TA value and / or resource scheduling information are used by the terminal and the second network element to perform uplink and / or downlink transmission to complete the handover, and the PRACH information is used by the second network element to indicate the completion of the handover;

[0254] The first network element is located in the switching source cell, and the second network element is located in the switching target cell.

[0255] In one embodiment of the present disclosure, the device further comprises:

[0256] The third receiving module is configured to receive a conditional handover pre-configuration sent by the first network element, where the conditional handover pre-configuration includes relevant configuration of at least one handover candidate cell.

[0257] In one embodiment of the present disclosure, 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.

[0258] The device provided in the embodiment of the present disclosure can implement each process implemented by the method embodiment shown in Figure 3 and achieve the same technical effect. To avoid repetition, it will not be described here.

[0259] 8 , an embodiment of the present disclosure provides a communication processing device, which is applied to a second network element. The device 800 includes:

[0260] The fourth receiving module 801 is configured to receive a TA value of a handover target cell sent by a first network element, and / or data amount indication information for triggering the handover target cell to perform uplink and / or downlink resource pre-authorization, wherein the TA value is used for uplink and / or downlink transmission between the terminal and the second network element to complete the handover;

[0261] The first network element is located in the switching source cell, and the second network element is located in the switching target cell.

[0262] In one embodiment of the present disclosure, the device further comprises:

[0263] The third sending module is used to send the power information of the switching candidate cell to the first network element.

[0264] In one embodiment of the present disclosure, the third sending module is further configured to:

[0265] Send scheduling information for uplink and downlink data transmission of the switching cell, or PRACH information, to the first network element.

[0266] In one embodiment of the present disclosure, the device further comprises:

[0267] A second determining module is configured to determine that the terminal handover is successful if it is determined that the scheduling data is correctly transmitted; and / or determine that the terminal handover is successful through a dedicated PRACH message;

[0268] The fourth sending module is used to receive third information, where the third information is used to indicate that the terminal has successfully switched.

[0269] In one embodiment of the present disclosure, 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.

[0270] The device provided in the embodiment of the present disclosure can implement each process implemented by the method embodiment shown in Figure 4 and achieve the same technical effect. To avoid repetition, it will not be described here.

[0271] As shown in FIG9 , an embodiment of the present disclosure further provides a communication device 900, including a processor 901, a memory 902, and a program or instruction stored in the memory 902 and executable on the processor 901. When the program or instruction is executed by the processor 901, the various processes of the method embodiments shown in FIG2 , FIG3 , or FIG4 are implemented, and the same technical effects are achieved. To avoid repetition, they are not described here in detail.

[0272] An embodiment of the present disclosure also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the method embodiment shown in Figure 2 or Figure 3 or Figure 4 above are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0273] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), random access memory (RAM), a magnetic disk, or an optical disk.

[0274] The steps of the method or algorithm described in conjunction with the present disclosure can be implemented in hardware or by executing software instructions on a processor. The software instructions can be composed of corresponding software modules, which can be stored in RAM, flash memory, ROM, erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), registers, hard disks, mobile hard disks, read-only optical disks, or any other form of storage medium 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 an integral part of the processor. The processor and the storage medium can be carried in an application-specific integrated circuit (ASIC). In addition, the ASIC can be carried in a core network interface device. Of course, the processor and the storage medium can also exist as discrete components in the core network interface device.

[0275] Those skilled in the art will appreciate that in one or more of the above examples, the functions described in this disclosure can be implemented using 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. Computer-readable media include computer storage media and communication media, wherein communication media include any media that facilitates the transmission of computer programs 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.

[0276] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the present disclosure in detail. It should be understood that the above description is only a specific implementation method of the present disclosure and is not intended to limit the scope of protection of the present disclosure. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the present disclosure should be included in the scope of protection of the present disclosure.

[0277] Those skilled in the art will appreciate that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the embodiments of the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the embodiments of the present disclosure may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, Compact Disc Read-Only Memory (CD-ROM), optical storage, etc.) containing computer-usable program code.

[0278] The present disclosure embodiments are described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present disclosure embodiments. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0279] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0280] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0281] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the embodiments of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include such modifications and variations.

Claims

1. A communication processing method, applied to a first network element, comprising: Receiving a layer 1 measurement report and / or a layer 3 measurement report; Determine a timing advance TA value of a handover target cell according to the layer 1 measurement report and / or the layer 3 measurement report; Sending the TA value to the terminal and the second network element respectively, wherein the TA value is used by the terminal and the second network element to perform uplink and / or downlink transmission to complete the switching; The first network element is located in the switching source cell, and the second network element is located in the switching target cell.

2. The method according to claim 1, wherein: Determining the TA value of the handover target cell according to the layer 1 measurement report and / or the layer 3 measurement report includes: Obtaining the original cell path loss and the switching candidate cell path loss according to the layer 1 measurement report and / or the layer 3 measurement report; Calculate the original cell theoretical TA value according to the original cell path loss; Calculating a spatial characteristic factor according to the theoretical TA value of the original cell and the actual TA value of the original cell; Calculate the theoretical TA value of the candidate switching cell according to the candidate switching cell path loss; Calculate the actual TA value of the candidate cell for handover according to the theoretical TA value of the candidate cell for handover and the spatial characteristic factor; The TA value of the handover target cell is determined according to the real TA value of the handover candidate cell and the selected handover target cell.

3. The method according to claim 2, further comprising: According to preset conditions, select the target cell for handover; The selection conditions include: Prioritize the neighboring cells with low frequency band and / or high cell reference power as the candidate cells for handover, and select the neighboring cells with small TA value as the target cell for handover from the candidate cells for handover; Or, a neighboring cell with a large coverage area is preferentially selected as a handover candidate cell, and a cell with a small TA value is selected from the handover candidate cells as the handover target cell.

4. The method according to claim 1, wherein: Before receiving the layer 1 measurement report and / or the layer 3 measurement report, the method further includes: Get the power information of the candidate cells for handover.

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

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

7. The method according to claim 1, wherein: Sending the TA value to the second network element includes: Sending second information to the second network element, where the second information is used to indicate at least one of the following: Switch the TA value of the target cell; Switch type; The data volume indication information triggering the handover target cell to perform uplink and / or downlink resource pre-authorization, wherein the data volume indication information is used to allocate uplink and / or downlink data transmission resource related information.

8. The method according to claim 7, wherein: The TA value of the handover target cell included in the uplink resource pre-grant is a relative value or an absolute value relative to the TA media access control element MAC CE.

9. The method according to claim 1, wherein: The first network element is a first distributed unit DU, the second network element is a second DU, and the first DU and the second DU are connected to a centralized unit CU.

10. A communication processing method, applied to a terminal, comprising: Sending the L1 measurement report and / or the L3 measurement report to the first network element; receiving a TA value of a handover target cell sent by a first network element, and / or resource scheduling information allocated by the target cell, and / or PRACH information; the TA value and / or the resource scheduling information are used by the terminal and the second network element to perform uplink and / or downlink transmission to complete the handover, and the PRACH information is used by the second network element to indicate the completion of the handover; The first network element is located in the switching source cell, and the second network element is located in the switching target cell.

11. The method according to claim 10, wherein: Before sending the L1 measurement report and / or the L3 measurement report to the first network element, the method further includes: A conditional handover pre-configuration is received from the first network element, where the conditional handover pre-configuration includes relevant configuration of at least one handover candidate cell.

12. The method according to claim 10, wherein: 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.

13. A communication processing method, applied to a second network element, comprising: Receiving a TA value of a handover target cell sent by a first network element, and / or data volume indication information for triggering the handover target cell to perform uplink and / or downlink resource pre-authorization, wherein the TA value is used for the terminal and the second network element to perform uplink and / or downlink transmission to complete the handover; The first network element is located in the switching source cell, and the second network element is located in the switching target cell.

14. The method according to claim 13, further comprising: Send power information of the switching candidate cell to the first network element.

15. The method according to claim 13, further comprising: Send scheduling information for uplink and downlink data transmission of the switching cell, or PRACH information, to the first network element.

16. The method according to claim 13, further comprising: If it is determined that the scheduling data is correctly transmitted, it is determined that the terminal switching is successful; and / or determining, through a dedicated PRACH message, that the terminal is successfully switched; Receive third information, where the third information is used to indicate that the terminal is switched successfully.

17. The method according to claim 13, wherein: 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.

18. A communication processing device, applied to a first network element, comprising: A first receiving module, configured to receive a measurement report of L1 and / or a measurement report of L3; A first determination module, configured to determine a TA value of a switching target cell according to the L1 measurement report and / or the L3 measurement report; A first sending module, used to send the TA value to the terminal and the second network element respectively, where the TA value is used by the terminal and the second network element to perform uplink and / or downlink transmission to complete the switching; The first network element is located in the switching source cell, and the second network element is located in the switching target cell.

19. A communication processing device, applied to a terminal, comprising: A second sending module, configured to send the L1 measurement report and / or the L3 measurement report to the first network element; A second receiving module is used to receive a TA value of a handover target cell sent by a first network element, and / or resource scheduling information allocated by the target cell, and / or PRACH information; the TA value and / or the resource scheduling information are used by the terminal and the second network element to perform uplink and / or downlink transmission to complete the handover, and the PRACH information is used by the second network element to indicate the completion of the handover; The first network element is located in the switching source cell, and the second network element is located in the switching target cell.

20. A communication processing device, applied to a second network element, comprising: a fourth receiving module, configured to receive a TA value of a handover target cell sent by the first network element, and / or data volume indication information for triggering the handover target cell to perform uplink and / or downlink resource pre-authorization, wherein the TA value is used for the terminal and the second network element to perform uplink and / or downlink transmission to complete the handover; The first network element is located in the switching source cell, and the second network element is located in the switching target cell.

21. A communication device, comprising a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction implements the steps of the method according to any one of claims 1 to 17 when executed by the processor.

22. A readable storage medium storing a program or an instruction, wherein the program or the instruction, when executed by a processor, implements the steps of the method according to any one of claims 1 to 17.

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