CN103634893A - Packet data convergence protocol serial number synchronization method and device - Google Patents
Packet data convergence protocol serial number synchronization method and device Download PDFInfo
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- CN103634893A CN103634893A CN201210296408.9A CN201210296408A CN103634893A CN 103634893 A CN103634893 A CN 103634893A CN 201210296408 A CN201210296408 A CN 201210296408A CN 103634893 A CN103634893 A CN 103634893A
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Abstract
The invention provides a packet data convergence protocol serial number synchronization method and a device, and belongs to the field of mobile communication. The packet data convergence protocol PDCP serial number synchronization method is applied to a relocation process of a no-loss serving radio network subsystem SRNS. The PDCP serial number synchronization method comprises that: a first device receives an under-reception protocol data unit PDU serial number sent by a second device of an opposite terminal; and the first device modifies the self-stored under-reception PDU serial number according to the received PDU serial number so that PDCP serial number synchronization is performed. According to the technical scheme, rapid serial number synchronization can be realized in the relocation process of the no-loss SRNS so that data sending efficiency is enhanced.
Description
Technical field
The present invention relates to moving communicating field, refer to especially a kind of PDCP sequence number synchronization method and device and.
Background technology
Harmless SRNS re-positioning technology is mainly used in SRNS(Serving Radio Network Subsystem, SRNS Serving Radio Network Subsystem) guarantee the harmless transmission of data while switching.In harmless repositioning process, UE (User Equipment, subscriber equipment) will expect to receive descending PDCP(Packet Data Convergence Protocol, PDCP) sequence number sends to UTRAN entity (UMTS Terrestrial Radio Access Network, UMTS Terrestrial radio access network), the up PDCP sequence number that same UTRAN entity receives expectation sends to UE.UE is by the same PDU(Protocol Data Unit preserving in buffer memory window that sends of the sequence number N of the expectation uplink receiving PDCP receiving, protocol Data Unit) sequence number compares, if being more than or equal to, N sends SN(serial number minimum in buffer memory window, serial number) and be less than or equal to maximum sequence number+1, do not need to carry out the synchronous of up sequence number, otherwise need to carry out up sequence number synchronization process.UTRAN entity by the sequence number N of the descending reception of the expectation receiving PDCP with sending the PDU(Protocol Data Unit preserving in buffer memory window) sequence number compare, if N is more than or equal to, sends SN minimum in buffer memory window and be less than or equal to maximum sequence number+1, do not need to carry out the synchronous of descending sequence number, otherwise need to carry out descending sequence number synchronization process.
The synchronizing process of up sequence number, UE is packaged into sequence number PDU by first PDU in transmission buffer memory window and sends to RLC entity (Radio Link Control, wireless chain control layer agreement), waits for that the transmission of RLC entity is successfully confirmed.Before confirming to send successfully, RLC entity no longer sends new PDU.When sequence number PDU successfully sends to after peer layer, uplink synchronous process completes, and after this can continue to send PDCP and send the up PDU of buffer memory in buffering window and the upstream data of newly receiving.The synchronizing process of descending sequence number and the synchronizing process of up sequence number are similar, and difference is that this process is initiated by UTRAN entity.
From description above, in sequence number synchronization process, the data of PDCP send the sliding window function of transmission of now not bringing into play PDCP in stopping wait state (no longer sending new data before sequence number PDU sends successfully), and data transmission rate is lowered.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of PDCP sequence number synchronization method and device, can in harmless SRNS repositioning process, realize rapid serial number synchronous, improves data transmission efficiency.
For solving the problems of the technologies described above, embodiments of the invention provide technical scheme as follows:
On the one hand, provide a kind of PDCP PDCP sequence number synchronization method, be applied in harmless SRNS Serving Radio Network Subsystem SRNS repositioning process, described PDCP sequence number synchronization method comprises:
The first equipment receives that the second equipment of opposite end sends treats receive protocol data units PDU sequence number;
The PUD sequence number to be sent that described in described the first equipment basis, PDU sequence number modification to be received self is preserved is to carry out PDCP sequence number synchronization.
Further, the PUD sequence number to be sent that described in described the first equipment basis, PDU sequence number modification to be received self is preserved also comprises to carry out PDCP sequence number synchronization before:
Described the first equipment compares the sequence number of PDU in PDU sequence number described to be received and the PUD sequence number to be sent of self preserving and transmission buffering window, described in judging, the PDU sequence number to be sent of PDU sequence number to be received and self preservation is inconsistent, and all inconsistent with the sequence number that sends all PDU in buffering window.
Further, the PDU sequence number to be received that the second equipment of described the first equipment reception opposite end sends comprises:
User equipment (UE) receives that universal mobile telecommunications system land radio access web UTRAN entity sends waits to receive up PDU sequence number UL_Receive_SN;
The PUD sequence number to be sent that described in described the first equipment basis, PDU sequence number modification to be received self is preserved comprises to carry out PDCP sequence number synchronization:
The value of the to be sent up PDU sequence number UL_Send_SN that described UE preserves self is revised as consistent with the value of described UL_Receive_SN, and the sequence number that sends the initial PDU in buffering window is revised as consistent with the value of described UL_Send_SN.
Further, the PUD sequence number to be sent that described in described the first equipment basis, PDU sequence number modification to be received self is preserved also comprises to carry out PDCP sequence number synchronization afterwards:
Described UE sends to wireless chain control layer RLC entity by the up PDU sending in buffering window, and after PDU of every transmission, the value of UL_Send_SN is added to 1.
Further, the receive protocol data units PDU sequence number for the treatment of that the second equipment of described the first equipment reception opposite end sends comprises:
Described UTRAN entity receives the row PDU sequence number DL_Receive_SN that accepts waiting that UE sends;
The PUD sequence number to be sent that described in described the first equipment basis, PDU sequence number modification to be received self is preserved comprises to carry out PDCP sequence number synchronization:
The value of the to be sent descending PDU sequence number DL_Send_SN that described UTRAN entity is preserved self is revised as consistent with the value of described DL_Receive_SN, and the sequence number that sends the initial PDU in buffering window is revised as consistent with the value of described DL_Send_SN.
Further, the PUD sequence number to be sent that described in described the first equipment basis, PDU sequence number modification to be received self is preserved also comprises to carry out PDCP sequence number synchronization afterwards:
Described UTRAN entity sends to RLC entity by the descending PDU sending in buffering window, and after PDU of every transmission, the value of DL_Send_SN is added to 1.
The embodiment of the present invention also provides a kind of PDCP PDCP sequence number synchronization device, is applied in harmless SRNS Serving Radio Network Subsystem SRNS repositioning process, and described PDCP sequence number synchronization device comprises:
Receiver module, treats receive protocol data units PDU sequence number for what receive that the second equipment of opposite end sends;
Processing module, revises the PUD sequence number to be sent self preserved to carry out PDCP sequence number synchronization for PDU sequence number to be received described in basis.
Further, described device also comprises:
Judge module, for the sequence number of PDU sequence number described to be received and the PUD sequence number to be sent of self preserving and transmission buffering window PDU is compared, described in judging, the PDU sequence number to be sent of PDU sequence number to be received and self preservation is inconsistent, and all inconsistent with the sequence number that sends all PDU in buffering window.
Further, described receiver module waits to receive up PDU sequence number UL_Receive_SN specifically for what receive that UTRAN entity sends;
Described processing module is revised as consistent with the value of described UL_Receive_SN specifically for the value of to be sent up PDU sequence number UL_Send_SN that self is preserved, and the sequence number that sends the initial PDU in buffering window is revised as consistent with the value of described UL_Send_SN.
Further, the row PDU sequence number DL_Receive_SN that accepts waiting that described receiver module sends specifically for receiving UE;
Described processing module is revised as consistent with the value of described DL_Receive_SN specifically for the value of to be sent descending PDU sequence number DL_Send_SN that self is preserved, and the sequence number that sends the initial PDU in buffering window is revised as consistent with the value of described DL_Send_SN.
Embodiments of the invention have following beneficial effect:
In such scheme, the PDU sequence number to be received that the first equipment receives according to the second equipment from opposite end is revised the PDU sequence number to be sent of self preserving, thereby realizes the sequence number synchronization of carrying out because sequence number is unavailable after harmless SRNS reorientation.Technical scheme of the present invention reduced make sequence number PDU, for whether supervisory sequence PDU sends successfully opening timing device, the operation that stops etc. that transmits Sequence Number in PDU process, can realize the Fast synchronization of PDCP sequence number, improve data transmission rate.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the PDCP sequence number synchronization method of the embodiment of the present invention;
Fig. 2 is the structured flowchart of the PDCP sequence number synchronization device of the embodiment of the present invention.
Embodiment
For technical problem, technical scheme and advantage that embodiments of the invention will be solved are clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
Embodiments of the invention in prior art in sequence number synchronization process the data of PDCP send the transmission cunning window function of now not bringing into play PDCP in stopping wait state (no longer sending new data before sequence number PDU sends successfully), the problem that data transmission rate is lowered, a kind of PDCP sequence number synchronization method and device are provided, can in harmless SRNS repositioning process, realize rapid serial number synchronous, improve data transmission efficiency.
Fig. 1 is the schematic flow sheet of the PDCP sequence number synchronization method of the embodiment of the present invention, and as shown in Figure 1, the present embodiment comprises:
Step 101: the first equipment receives the PDU sequence number to be received of the second equipment transmission of opposite end;
Step 102: the PUD sequence number to be sent that the first equipment self is preserved according to PDU sequence number modification to be received is to carry out PDCP sequence number synchronization.
In such scheme, the PDU sequence number to be received that the first equipment receives according to the second equipment from opposite end is revised the PDU sequence number to be sent of self preserving, thereby realizes the sequence number synchronization of carrying out because sequence number is unavailable after harmless SRNS reorientation.Technical scheme of the present invention reduced make sequence number PDU, for whether supervisory sequence PDU sends successfully opening timing device, the operation that stops etc. that transmits Sequence Number in PDU process, can realize the Fast synchronization of PDCP sequence number, improve data transmission rate.
Further, the PUD sequence number to be sent that the first equipment self is preserved according to PDU sequence number modification to be received also comprises to carry out PDCP sequence number synchronization before:
The first equipment compares the sequence number of PDU in PDU sequence number to be received and the PUD sequence number to be sent of self preserving and transmission buffering window, the PDU sequence number to be sent of judging PDU sequence number to be received and self preserving is inconsistent, and all inconsistent with the sequence number that sends all PDU in buffering window.
Further, the PDU sequence number to be received that the second equipment of the first equipment reception opposite end sends comprises:
User equipment (UE) receives that universal mobile telecommunications system land radio access web UTRAN entity sends waits to receive up PDU sequence number UL_Receive_SN;
The first equipment is revised according to PDU sequence number to be received the PUD sequence number to be sent of self preserving and is comprised to carry out PDCP sequence number synchronization:
The value of the to be sent up PDU sequence number UL_Send_SN that UE preserves self is revised as consistent with the value of UL_Receive_SN, and the sequence number that sends the initial PDU in buffering window is revised as consistent with the value of UL_Send_SN.
Further, the PUD sequence number to be sent that the first equipment self is preserved according to PDU sequence number modification to be received also comprises to carry out PDCP sequence number synchronization afterwards:
UE sends to wireless chain control layer RLC entity by the up PDU sending in buffering window, and after PDU of every transmission, the value of UL_Send_SN is added to 1.
Further, the receive protocol data units PDU sequence number for the treatment of that the second equipment of the first equipment reception opposite end sends comprises:
UTRAN entity receives the row PDU sequence number DL_Receive_SN that accepts waiting that UE sends;
The first equipment is revised according to PDU sequence number to be received the PUD sequence number to be sent of self preserving and is comprised to carry out PDCP sequence number synchronization:
The value of the to be sent descending PDU sequence number DL_Send_SN that UTRAN entity is preserved self is revised as consistent with the value of DL_Receive_SN, and the sequence number that sends the initial PDU in buffering window is revised as consistent with the value of DL_Send_SN.
Further, the PUD sequence number to be sent that the first equipment self is preserved according to PDU sequence number modification to be received also comprises to carry out PDCP sequence number synchronization afterwards:
UTRAN entity sends to RLC entity by the descending PDU sending in buffering window, and after PDU of every transmission, the value of DL_Send_SN is added to 1.
Fig. 2 is the structured flowchart of the PDCP sequence number synchronization device of the embodiment of the present invention, and as shown in Figure 2, the present embodiment comprises:
Further, this device also comprises:
Judge module, for the sequence number of PDU sequence number to be received and the PUD sequence number to be sent of self preserving and transmission buffering window PDU is compared, the PDU sequence number to be sent of judging PDU sequence number to be received and self preserving is inconsistent, and all inconsistent with the sequence number that sends all PDU in buffering window.
Further, the device of the present embodiment can be applied in UE,
Further, the device of the present embodiment can be applied in UTRAN entity,
The row PDU sequence number DL_Receive_SN that accepts waiting that receiver module 20 sends specifically for receiving UE;
It should be noted that: this device embodiment is the device corresponding with the embodiment of the method shown in above-mentioned Fig. 1, in said method embodiment, all realization in the embodiment that means are all applicable to this device, also can reach identical technique effect.
At present, PDCP is by the harmless reorientation of upper-layer configured support, UE needs the next descending PDU sequence number receiving of maintenance parameters DL_Receive_SN(record) and the next up PDU sequence number that will send of UL_Send_SN(record), corresponding is that UTRAN entity need to be safeguarded the next descending PDU sequence number that will send of DL_Send_SN(record) and the next up PDU sequence number that will receive of UL_Receive_SN(record).Equally, UE and UTRAN entity also will be safeguarded the transmission buffer memory window of local terminal, to preserve the PDU that sends but be not also confirmed.
In prior art, in harmless SRNS repositioning process, UE sends to UTRAN entity by DL_Receive_SN, and UTRAN entity sends to UE by UL_Receive_SN; If the UL_Receive_SN that UE receives equals the UL_Send_SN of self or equals to send the sequence number of some PDU in buffer memory window, sequence number can be with not needing to carry out up sequence number synchronization, otherwise need to carry out up sequence number synchronization process: UE the PDU that sends first (sending the earliest) not confirmed in buffering window be made into SN_PDU(sequence number PDU) send to RLC entity, and unlatching supervision timer, suspend the transmission of new data, wait for the acknowledge message of RLC entity; If receiving that the data of RLC entity abandon indication or supervision timer is overtime does not also receive abandoning or acknowledge message of RLC entity, again to RLC entity, send SN_PDU.If received the acknowledge message of RLC entity, stop supervision timer, synchronizing process finishes, and first PDU sending in buffering window is abandoned, and continues to send other PDU in buffer memory window, and during this, UL_Send_SN remains unchanged; After data in buffer memory window send, proceed the transmission of other upstream data, the new PDU of after this every transmission one bag will add 1 to UL_Send_SN after RLC entity.
In prior art, in sequence number synchronization process, the data of PDCP send in stopping wait state, no longer send new data before sequence number PDU sends successfully, now do not bring into play the sliding window function of transmission of PDCP, and data transmission rate is lowered.
PDCP sequence number synchronization method provided by the invention can realize fast sequence number synchronization under the unavailable situation of harmless SRNS reorientation sequence number, in synchronizing process, do not stop to wait operation, the transmission buffering window that makes full use of PDCP is realized the fast transport of data, do not need to make sequence number PDU and supervisory sequence PDU and whether successfully send to peer layer, simplified synchronizing process.Below in conjunction with specific embodiment, PDCP sequence number synchronization method of the present invention is further detailed:
Embodiment mono-:
The technical scheme of the present embodiment can realize in harmless SRNS repositioning process, and up sequence number synchronous specifically comprises the following steps:
Step a1: in harmless SRNS repositioning process, UE receives the UL_Receive_SN that UTRAN entity sends, and enters step a2;
Step a2:UE makes comparisons the PDU sequence number in the UL_Receive_SN receiving and the UL_Send_SN of self and transmission buffering window, if the sequence number that the UL_Receive_SN that UE receives equals the UL_Send_SN of self or equals self to send some PDU in buffer memory window sequence number can be used, do not need to carry out up sequence number synchronization, otherwise need to carry out up sequence number synchronization, enter step a3;
Step a3:UE by the value assignment of UL_Receive_SN to UL_Send_SN, the PDU sequence number that sends first not confirmed in buffer memory window is revised as to UL_Send_SN, the sequence number of the PDU of other not confirmeds all be take UL_Send_SN and is increased progressively successively as basis, enters afterwards step a4;
Step a4: up sequence number synchronization process finishes, UE resends the entity to RLC by PDU in transmission buffering window, and after PDU of every transmission, the value of UL_Send_SN is added to 1.
In the present embodiment, UE revises the up PDU sequence number of self according to the up PDU sequence number receiving from UTRAN entity, thereby realizes the sequence number synchronization that UE carries out because sequence number is unavailable after harmless SRNS reorientation.The present embodiment reduced make sequence number PDU, for whether supervisory sequence PDU sends successfully opening timing device, the operation that stops etc. that transmits Sequence Number in PDU process, can realize the Fast synchronization of PDCP sequence number, improve data transmission rate.
Embodiment bis-:
The technical scheme of the present embodiment can realize in harmless SRNS repositioning process, and descending sequence number synchronous specifically comprises the following steps:
Step b1: in harmless SRNS repositioning process, UTRAN entity receives the DL_Receive_SN that UE sends, and enters step b2;
Step b2:UTRAN entity is made comparisons the PDU sequence number in the DL_Receive_SN receiving and the DL_Send_SN of self and transmission buffering window, if the sequence number that the DL_Receive_SN that UTRAN entity receives equals the DL_Send_SN of self or equals self to send some PDU in buffer memory window sequence number can be used, do not need to carry out descending sequence number synchronization, otherwise need to carry out descending sequence number synchronization, enter step b3;
Step b3:UTRAN entity by the value assignment of DL_Receive_SN to DL_Send_SN, the PDU sequence number that sends first not confirmed in buffer memory window is revised as to DL_Send_SN, the sequence number of the PDU of other not confirmeds all be take DL_Send_SN and is increased progressively successively as basis, enters afterwards step b4;
Step b4: descending sequence number synchronization process finishes, UTRAN entity resends the entity to RLC by PDU in transmission buffering window, and after PDU of every transmission, the value of DL_Send_SN is added to 1.
In the present embodiment, UTRAN entity is revised the descending PDU sequence number of self according to the descending PDU sequence number receiving from UE, thereby realizes the sequence number synchronization that UTRAN entity carries out because sequence number is unavailable after harmless SRNS reorientation.Technical scheme of the present invention reduced make sequence number PDU, for whether supervisory sequence PDU sends successfully opening timing device, the operation that stops etc. that transmits Sequence Number in PDU process, can realize the Fast synchronization of PDCP sequence number, improve data transmission rate.
Many functional parts described in this specification are all called as module, to emphasize more especially the independence of its implementation.
In the embodiment of the present invention, module can realize with software, to carried out by various types of processors.For instance, the executable code module of a sign can comprise one or more physics or the logical block of computer instruction, and for instance, it can be built as object, process or function.However, the executable code of institute's identification module is without being physically located in together, but can comprise the different instruction on being stored in coordination not, while combining in these command logics, and its composition module and realize the regulation object of this module.
In fact, executable code module can be individual instructions or many instructions, and even can be distributed on a plurality of different code segments, is distributed in the middle of distinct program, and crosses over a plurality of memory devices distributions.Similarly, operating data can be identified in module, and can realize and be organized in the data structure of any suitable type according to any suitable form.Described operating data can be used as individual data collection and is collected, or can be distributed on diverse location and (be included in different storage device), and can only as electronic signal, be present on system or network at least in part.
When module can utilize software to realize, consider the level of existing hardware technique, so module that can realize with software, in the situation that not considering cost, those skilled in the art can build corresponding hardware circuit and realize corresponding function, and described hardware circuit comprises conventional ultra-large integrated (VLSI) circuit or gate array and the existing semiconductor such as logic chip, transistor or other discrete element.Module can also be used programmable hardware device, realizations such as field programmable gate array, programmable logic array, programmable logic device.
In each embodiment of the method for the present invention; the sequence number of described each step can not be for limiting the sequencing of each step; for those of ordinary skills, do not paying under the prerequisite of creative work, the priority of each step is changed also within protection scope of the present invention.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a PDCP PDCP sequence number synchronization method, is applied to, in harmless SRNS Serving Radio Network Subsystem SRNS repositioning process, it is characterized in that, described PDCP sequence number synchronization method comprises:
The first equipment receives that the second equipment of opposite end sends treats receive protocol data units PDU sequence number;
The PUD sequence number to be sent that described in described the first equipment basis, PDU sequence number modification to be received self is preserved is to carry out PDCP sequence number synchronization.
2. PDCP sequence number synchronization method according to claim 1, is characterized in that, described the first equipment according to described in PDU sequence number to be received revise the PUD sequence number to be sent self preserved and before PDCP sequence number synchronization, also comprise carrying out:
Described the first equipment compares the sequence number of PDU in PDU sequence number described to be received and the PUD sequence number to be sent of self preserving and transmission buffering window, described in judging, the PDU sequence number to be sent of PDU sequence number to be received and self preservation is inconsistent, and all inconsistent with the sequence number that sends all PDU in buffering window.
3. PDCP sequence number synchronization method according to claim 2, is characterized in that, the PDU sequence number to be received that described the first equipment receives the second equipment transmission of opposite end comprises:
User equipment (UE) receives that universal mobile telecommunications system land radio access web UTRAN entity sends waits to receive up PDU sequence number UL_Receive_SN;
The PUD sequence number to be sent that described in described the first equipment basis, PDU sequence number modification to be received self is preserved comprises to carry out PDCP sequence number synchronization:
The value of the to be sent up PDU sequence number UL_Send_SN that described UE preserves self is revised as consistent with the value of described UL_Receive_SN, and the sequence number that sends the initial PDU in buffering window is revised as consistent with the value of described UL_Send_SN.
4. PDCP sequence number synchronization method according to claim 3, is characterized in that, described the first equipment according to described in PDU sequence number to be received revise the PUD sequence number to be sent self preserved and after PDCP sequence number synchronization, also comprise carrying out:
Described UE sends to wireless chain control layer RLC entity by the up PDU sending in buffering window, and after PDU of every transmission, the value of UL_Send_SN is added to 1.
5. PDCP sequence number synchronization method according to claim 2, is characterized in that, the receive protocol data units PDU sequence number for the treatment of that described the first equipment receives the second equipment transmission of opposite end comprises:
Described UTRAN entity receives the row PDU sequence number DL_Receive_SN that accepts waiting that UE sends;
The PUD sequence number to be sent that described in described the first equipment basis, PDU sequence number modification to be received self is preserved comprises to carry out PDCP sequence number synchronization:
The value of the to be sent descending PDU sequence number DL_Send_SN that described UTRAN entity is preserved self is revised as consistent with the value of described DL_Receive_SN, and the sequence number that sends the initial PDU in buffering window is revised as consistent with the value of described DL_Send_SN.
6. PDCP sequence number synchronization method according to claim 5, is characterized in that, described the first equipment according to described in PDU sequence number to be received revise the PUD sequence number to be sent self preserved and after PDCP sequence number synchronization, also comprise carrying out:
Described UTRAN entity sends to RLC entity by the descending PDU sending in buffering window, and after PDU of every transmission, the value of DL_Send_SN is added to 1.
7. a PDCP PDCP sequence number synchronization device, is applied to, in harmless SRNS Serving Radio Network Subsystem SRNS repositioning process, it is characterized in that, described PDCP sequence number synchronization device comprises:
Receiver module, treats receive protocol data units PDU sequence number for what receive that the second equipment of opposite end sends;
Processing module, revises the PUD sequence number to be sent self preserved to carry out PDCP sequence number synchronization for PDU sequence number to be received described in basis.
8. PDCP sequence number synchronization device according to claim 7, is characterized in that, described device also comprises:
Judge module, for the sequence number of PDU sequence number described to be received and the PUD sequence number to be sent of self preserving and transmission buffering window PDU is compared, described in judging, the PDU sequence number to be sent of PDU sequence number to be received and self preservation is inconsistent, and all inconsistent with the sequence number that sends all PDU in buffering window.
9. PDCP sequence number synchronization device according to claim 8, is characterized in that,
Described receiver module waits to receive up PDU sequence number UL_Receive_SN specifically for what receive that UTRAN entity sends;
Described processing module is revised as consistent with the value of described UL_Receive_SN specifically for the value of to be sent up PDU sequence number UL_Send_SN that self is preserved, and the sequence number that sends the initial PDU in buffering window is revised as consistent with the value of described UL_Send_SN.
10. PDCP PDCP sequence number synchronization device according to claim 8, is characterized in that,
The row PDU sequence number DL_Receive_SN that accepts waiting that described receiver module sends specifically for receiving UE;
Described processing module is revised as consistent with the value of described DL_Receive_SN specifically for the value of to be sent descending PDU sequence number DL_Send_SN that self is preserved, and the sequence number that sends the initial PDU in buffering window is revised as consistent with the value of described DL_Send_SN.
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| CN113473563A (en) * | 2021-07-05 | 2021-10-01 | 中国联合网络通信集团有限公司 | Distribution method, mobile network switching method, system, server and medium |
| CN113473563B (en) * | 2021-07-05 | 2022-09-02 | 中国联合网络通信集团有限公司 | Distribution method, mobile network switching method, system, server and medium |
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