CN102265700B - Method of releasing radio bearer in wireless communication system and receiver - Google Patents
Method of releasing radio bearer in wireless communication system and receiver Download PDFInfo
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- CN102265700B CN102265700B CN200980152519.9A CN200980152519A CN102265700B CN 102265700 B CN102265700 B CN 102265700B CN 200980152519 A CN200980152519 A CN 200980152519A CN 102265700 B CN102265700 B CN 102265700B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/30—Connection release
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
- H04L69/321—Interlayer communication protocols or service data unit [SDU] definitions; Interfaces between layers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0027—Control or signalling for completing the hand-off for data sessions of end-to-end connection for a plurality of data sessions of end-to-end connections, e.g. multi-call or multi-bearer end-to-end data connections
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
- H04W60/06—De-registration or detaching
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Abstract
A method and apparatus of releasing a radio bearer in a wireless communication system is provided. After determining to release a radio link control (RLC) entity and a packet data convergence protocol (PDCP) entity, the RLC entity is released after delivering an RLC service data unit (SDU) extracted according to a release request of the RLC entity to the PDCP entity. A first PDCP SDU obtained by processing the RLC SDU is stored in a reception buffer at the PDCP entity. The PDCP entity is released after delivering the first PDCP SDU stored in the reception buffer to a higher layer.
Description
Technical field
The present invention relates to radio communication, relate in particular to the method and apparatus for releasing wireless loading in a wireless communication system.
Background technology
Wireless communication system is widely used in provides speech business or Packet Service.Multi-address system by share can system resource support multi-user communication.The example of multi-address system comprises code division multiple access (CDMA) system, frequency division multiple access (FDMA) system, time division multiple access (TDMA) system, OFDM (OFDMA) system etc.
Third generation partner program (3GPP) release 8 introduces the 3GPP Long Term Evolution (LTE) as the evolution of General Mobile mobile communication system (UMTS).3GPP LTE uses OFDMA in the downlink, and uses single carrier-FDMA (SC-FDMA) in the uplink.3GPP LTE adopts the multiple-input and multiple-output (MIMO) with 4 antennas.In recent years, carry out continuing to discuss to the 3GPP LTE-of the evolution as 3GPP LTE senior (LTE-A).
Radio bearer is the logical path for the transfer of data between user and network.Can create in any time of the request of user or network, re-establish and releasing wireless loading.In general, when releasing wireless loading, the whole data be stored in the buffer of each layer are simply discarded and do not carry out any process to these data.
But if directly abandon whole data when releasing wireless loading, then this may cause the invalid use of resource.This is because when owing to abandoning the data successfully received during releasing wireless loading, these data may repeatedly be transmitted again afterwards.
Summary of the invention
Technical problem
The invention provides a kind of method of releasing wireless loading to avoid losing the data stored in buffer, and provide a kind of receiver.
Technical scheme
In one aspect, the invention provides a kind of method of releasing wireless loading in a wireless communication system.The method comprises the following steps: determine release wireless spread-spectrum technology (RLC) entity and PDCP (PDCP) entity; After the RLC Service Data Unit (SDU) extracted transmitting the releasing request according to described RLC entity to described PDCP entity, discharge described RLC entity; A PDCP SDU by obtaining described RLC SDU process is stored in the reception buffer of described PDCP entity; And after the PDCP SDU be stored in described reception buffer is sent to upper strata, discharge described PDCP entity.
The method can be further comprising the steps of: the 2nd PDCP SDU be previously stored in described reception buffer is sent to described upper strata.
The described multiple PDCP SDU be stored in described reception buffer can be sent to described upper strata according to the ascending order of the sequence number of each PDCP SDU (SN).
The described multiple PDCP SDU be stored in described reception buffer can be the whole PDCP SDU be stored in described reception buffer.
Described PDCP entity can by be decrypted described RLC SDU and header decompression obtains a PDCP SDU.
Described RLC SDU can obtain by recombinating at least one the rlc protocol data cell (PDU) received from transmitter.
The quantity being sent to the RLC SDU of described PDCP entity is multiple, and described multiple RLC SDU is sent to described PDCP entity according to the ascending order of the SN of each RLC SDU.
On the other hand, provide a kind of receiver, this receiver comprises: radio frequency (RF) unit; And processor, it is operably connected to described RF unit, and for releasing wireless loading, and this processor is configured to perform following operation: determine release wireless spread-spectrum technology RLC entity and PDCP PDCP entity; After the RLC Service Data Unit SDU extracted transmitting the releasing request according to described RLC entity to described PDCP entity, discharge described RLC entity; A PDCPSDU by obtaining described RLC SDU process is stored in the reception buffer of described PDCP entity; And after the PDCP SDU be stored in described reception buffer is sent to upper strata, discharge described PDCP entity.
Beneficial effect
By avoiding the transfer of data of redundancy, Radio Resource can be effectively utilized.In addition, the loss of the data block received discontinuously can be prevented.
Accompanying drawing explanation
Fig. 1 illustrates the structure of wireless communication system.
Fig. 2 is the block diagram illustrating that the function between evolved universal terrestrial wireless access network (E-UTRAN) and evolution block core (EPC) divides.
Fig. 3 is the figure of the radio protocol architecture illustrated for user face.
Fig. 4 is the figure of the radio protocol architecture illustrated for chain of command.
Fig. 5 is the flow chart that hybrid automatic repeat-request (HARQ) and HARQ (ARQ) are shown.
Fig. 6 is the flow chart of the example that releasing wireless loading is shown.
Fig. 7 is the concept map of the process that releasing wireless loading is shown.
Fig. 8 is the block diagram that the wireless communication system realizing an embodiment of the invention is shown.
Embodiment
Fig. 1 is the block diagram that wireless communication system is shown.Fig. 1 can be the network configuration of third generation partner program (3GPP) Long Term Evolution (LTE)/LTE-senior (LTE-A).E-UTRAN (evolution-UMTS Terrestrial radio access network) comprises at least one base station (BS) 20 providing user face and chain of command to subscriber equipment (UE) 10.UE can be fixing or mobile, and can use other term, such as MS (travelling carriage), UT (user terminal), SS (subscriber board), MT (mobile terminal), wireless device etc.BS 20 can be the fixed station communicated with UE 10, and can use other term, such as e-NB (evolution-NodeB), BTS (base station transceiver system), access point etc.An one or more community is there is in the coverage of BS 20.The interface sending traffic carrying capacity or control traffic can be used between multiple BS 20.BS 20 is by X2 interface mutual connection.BS 20 is also connected to EPC (evolution block core) by S1 interface, is connected to MME (Mobility Management Entity) more particularly by S1-MME, and is connected to gateway (S-GW) by S1-U.S1 interface supports the many-to-many relationship between MME/S-SW30 and BS 20.
Hereinafter, " descending " represents the communication of from BS 20 to UE 10, and " up " represents the communication of from UE 10 to BS 20.In downstream, transmitter can be a part of BS 20, and receiver can be a part of UE 10.In up, transmitter can be a part of UE 20, and receiver can be a part of BS 20.
Fig. 2 is the block diagram illustrating that the function between E-UTRAN and EPC divides.Oblique line frame illustrates radio protocol layer, and white edge illustrates the functional entity of chain of command.BS performs following functions: (1) radio resource management function, such as radio bearer control, wireless access control, connect mobility control, at up link and down link to UE dynamic allocation of resources (scheduling); (2) IP (Internet protocol) header-compressed of customer traffic and encryption; (3) user face data is to the route of S-GW; (4) scheduling of beep-page message and transmission; (5) scheduling of broadcast message and transmission; And the measurement of (6) mobility and scheduling and measurement report configuration.MME performs following functions: (1) NAS (Non-Access Stratum) signaling; (2) NAS signaling security; (3) idle pulley UE accessibility; (4) zone list management is chased; (5) roam; And (6) certification.S-GW performs following functions: (1) mobility grappling and (2) Lawful intercept.PDN Gateway (P-GW) performs following functions: (1) UE IP (Internet protocol) distributes and (2) packet filtering.
Fig. 3 is the block diagram of the radio protocol architecture illustrated for user face.Fig. 4 is the block diagram of the radio protocol architecture illustrated for chain of command.Data surface is the protocol stack for user data transmission, and chain of command is the protocol stack for control signal transmission.
With reference to Fig. 3 and Fig. 4, physics (PHY) layer provides information transfer service by physical channel to upper strata.PHY layer is connected by transmission channel and MAC (medium access control) layer (that is, the upper strata of PHY layer).Between MAC layer and PHY layer, data are transmitted by transmission channel.Which kind of how to carry out on a wireless interface transmitting and according to feature carrying out sending classifying to transmission channel according to data.Between the different physical layers (that is, between the physical layer and the physical layer of receiver of transmitter), pass through physical channel transfers data.
Use multiple physical control channel within the physical layer.Physical Downlink Control Channel (PDCCH) can by with the Resourse Distribute of paging channel (PCH) and DSCH Downlink Shared Channel (DL-SCH) and the information of hybrid automatic repeat-request (HARQ) relating to DL-SCH, inform UE.PDCCH can carry uplink scheduling grant, this uplink scheduling grant by the resource allocation announcement of ul transmissions to UE.The quantity of the OFDM symbol being used for PDCCH is informed to UE by physical control format indicator channel (PCFICH), and sends PCFICH in each subframe.Physical Hybrid ARQ Indicator channel (PHICH) carries the HARQACK/NAK signal in response to ul transmissions.Physical Uplink Control Channel (PUCCH) carries uplink control information, such as in response to the HARQ AC/NAK of downlink transmission, dispatch request and CQI (CQI).Physical Uplink Shared Channel (PUSCH) carries Uplink Shared Channel (UL-SCH).
The function of MAC layer comprises: the mapping between logic channel and transmission channel; And the MAC SDU (Service Data Unit) belonging to or Different Logic channel is multiplexed into the transmission block (TB) being sent to PHY layer on transport channels, the MAC SDU (Service Data Unit) of or Different Logic channel is gone out to belong to from the transmission block sent from PHY layer on transport channels (TB) demultiplexing.MAC layer provides service by logic channel to RLC (wireless spread-spectrum technology) layer.Logic channel can be divided into two groups: for the control channel of transfer control surface information and the Traffic Channel for transmitting user plane information.
The function of rlc layer comprises serial connection to RLC SDU, Segmentation and Reassembly.In order to ensure the various service quality (QoS) required by radio bearer (RB), rlc layer provides three kinds of mode of operation: TM (transparent mode), UM (Unacknowledged Mode) and AM (affirmation mode).AM RLC provides error correction by HARQ (ARQ).
Function for PDCP (PDCP) layer in user face comprises transmission user data, header compress/decompress and encrypt/decrypt.Function for the PDCP layer of chain of command comprises transfer control face data, encryption and integrity protection.
RRC (wireless heterogeneous networks) layer is only limited in chain of command.Rrc layer is used for the configuration of radio bearer (RB), reconfigures and discharge and control logic channel, transmission channel and physical channel explicitly.RB represent provided by ground floor (that is, PHY layer) and the second layer (that is, MAC layer, rlc layer and PDCP layer), for the logical path of transfer of data between UE and network.Configuration RB comprises: limit the feature of radio protocol layer and channel, to provide service; And limit design parameter and programme of work.RB can be categorized as signaling RB (SRB) and data RB (DRB).SRB is used as the path of transmitting RRC information in the control plane, and DRB is used as the path of transmitting user data in user face.
NAS (Non-Access Stratum) layer belonging to the upper strata of rrc layer is used for conversate management and mobile management.
Fig. 5 is the flow chart that hybrid automatic repeat-request (HARQ) and HARQ (ARQ) are shown.The RLC entity 110 of transmitter 100 to MAC entity 120 transmit Sequence Number (SN) be 0 rlc protocol data cell (PDU) (step S110).The MAC entity 120 of transmitter 100 sends (multiple) MAC PDU1 corresponding with the RLC PDU of SN=0 to the MAC entity 220 of receiver 200.When successfully receiving MAC PDU, MAC entity 220 sends the RLC PDU (step S114) of SN=0 to RLC entity 210.
The RLC entity 110 of transmitter 100 sends the RLC PDU (step S120) of SN=1 to MAC entity 120.The MAC entity 120 of transmitter 100 sends (multiple) MAC PDU2 (step S122) corresponding with the RLC PDU of SN=1 to the MAC entity 220 of receiver 200.Suppose, wireless channel deterioration, and carry out HARQ for MACPDU2 thus.
The RLC entity 110 of transmitter 100 sends the RLC PDU (step S130) of SN=2 to MAC entity 120.The MAC entity 120 of transmitter 100 sends (multiple) MAC PDU3 (step S132) corresponding with the RLC PDU of SN=2 to the MAC entity 220 of receiver 200.When successfully receiving MAC PDU3, MAC entity 220 sends the RLC PDU (step S134) of SN=2 to RLC entity 210.
The HARQ process carried out for (multiple) MAC PDU2 corresponding with the RLC PDU of SN=1 completes (step S135), and RLC entity 210 obtains the RLC PDU (step S136) of SN=1.According to HARQ process, the SN of the PDU received by RLC entity 210 is possible and discontinuous.This is called that HARQ resequences.
The RLC entity 110 of transmitter 100 sends the RLC PDU (step S140) of SN=3 to MAC entity 120.In the case, poll bit is set in the header of RLC PDU, and requests status report.The MAC entity 120 of transmitter 100 sends (multiple) MAC PDU4 (step S142) corresponding with the RLC PDU of SN=3 to the MAC entity 220 of receiver 200.When successfully receiving MAC PDU4, MAC entity 220 sends the RLC PDU (step S114) of SN=3 to RLC entity 210.When requesting status report, RLC entity 210 builds status PDU, and sends this status PDU (step S150) to the RLC entity 110 of receiver 100.
PDU is the data block sent to lower floor by certain layer.SDU is the data block that certain layer receives from upper strata.Such as, RLC PDU is the data block that RLC sends to MAC, and RLC SDU is the data block that RLC receives from PDCP.The function of each layer can be depended on and different from PDU to the conversion of SDU or from SDU to the conversion of PDU.
Support that the RLC entity of ARQ is called affirmation mode (AM) RLC entity.Do not support that the RLC entity of ARQ is called non-acknowledgement (UM) RLC entity.
UM RLC entity builds the PDU respectively with the header comprising sequence number (SN), can know to lost which PDU in the transmission to allow the UM RLC entity of receiver.In UM RLC, user face process broadcast/multi broadcast transfer of data or real time packet data transmission, such as voice (such as, voice over internet protocol (VoIP)) or grouping service domain in stream, further, chain of command process does not require to transmit for the RRC information of the confirmation of receipt of the RRC information sent to the particular UE in community or particular UE group.
After receiving PDU, first the UM RLC entity of receiver checks the SN of PDU.If the PDU received is PDU according to the order of sequence relative to previously received PDU, then the SDU obtained by this PDU of process is sent to upper strata (such as, PDCP).Otherwise, if the PDU received is out-of-sequence PDU, then this PDU is stored in a buffer.PDU waits in a buffer always, until receiving according to the order of sequence till PDU.
RLC entity receives out-of-sequence PDU because of following two reasons.First reason is that this PDU loses in the transmission, and second reason carries out HARQ rearrangement in low layer.When there is received out of sequence when losing due to PDU that such as first reason describes, the UM RLC entity of receiver preferably send to upper strata immediately received out of sequence to PDU.When there is received out of sequence when the HARQ rearrangement due to such as the second reason description, after special time, receiving PDU according to the order of sequence.Thus, the UM RLC of receiver preferably waits for always, until have passed through this special time, then receives PDU according to the order of sequence and PDU received by process.
Timer is defined, to process above-mentioned two kinds of problem conditions receiving out-of-sequence PDU by the UM RLC entity of receiver.When received out of sequence is to specific PDU, this PDU is stored in a buffer and timer starts simultaneously.If until timer expires receive PDU according to the order of sequence not yet, then determine that received out of sequence causes because PDU loses.That is, when received out of sequence is to specific PDU, this PDU waits in a buffer always, till timer expires or till having received previous PDU according to the order of sequence.
Be similar to UM RLC entity, AM RLC entity also builds the PDU with the header comprising SN.But the difference that AM RLC entity is different from UM RLC entity is, AM RLC entity sends to transmitter in response to the PDU received and confirms.The PDU that this confirmation does not receive for asking transmitter to resend receiver.AM RLC is used for by carrying out retransmitting the object guaranteeing faultless transfer of data.In AM RLC, the transmission of user face process unreal time packet data, transmission control protocol/Internet protocol (TCP/IP) in such as grouping service domain, and chain of command processing requirements transmits for the RRC information of the confirmation of receipt of the RRC information sent to the particular UE in community.
When receiving PDU, first AMRLC entity also verifies the SN of PDU, and this is identical with UMRLC entity.If the PDU received is PDU according to the order of sequence relative to previously received PDU, then the SDU obtained by this PDU of process is sent to upper strata.Otherwise, if the PDU received is out-of-sequence PDU, then this PDU is stored in a buffer.This PDU waits in a buffer always, until receiving according to the order of sequence till PDU.
Due to identical with UMRLC, AMRLC receives out-of-sequence PDU.But, due to AMRLC support retransmit, do not transmit when the timer has lapsed received out of sequence to PDU.On the contrary, to the AM RLC status report of transmitter, the PDU be not successfully received with request retransmission.Therefore, in AM RLC entity, if received out of sequence is to specific PDU, then received PDU waits for, in a buffer till receiving previous PDU according to the order of sequence always.
PDCP layer receives the PDCP PDU sent from the rlc layer of the low layer as PDCP layer.Then, PDCP layer is decrypted and header decompression PDCP PDU, then transmits the PDCP SDU after decompressing to upper strata.In general, the situation that PDCP SDU waits in the buffer of PDCP layer can't be there is.This is because transmit PDCP PDU according to the ascending order of SN all the time as the UM RLC of the low layer of PDCP layer or AM RLC, and PDCP, thus by processing PDCP PDU successively, carrys out the PDCP PDU received by transmitting to upper strata.
Radio bearer (RB) is the path of transfer of data, and can carry out creating or discharging in any time of the request of UE or network.But as mentioned above, due to the received out of sequence of such as HARQ rearrangement, PDU or SDU may be stored in RLC buffer and/or PDCP buffer.In the case, if directly abandon when discharging RB the data be stored in RLC buffer and/or PDCP buffer, then this may cause the invalid utilization of resource.
Therefore, in method described below, storage data in a buffer can be processed when discharging RB, even if make the loss of data when discharging RB minimize.
Fig. 6 is the flow chart of the example that releasing wireless loading (RB) is shown.The method can be undertaken by the processor of receiver.
In step S610, receiver is determined to discharge RB.RRC sends RB releasing request to RLC and PDCP, to ask to discharge RLC and PDCP.RLC can be UM RLC or AM RLC.
In step S620, the RLC of receiver, by recombinating to the RLC PDU be stored in RLC reception buffer, obtains RLC SDU, and transmits the RLC SDU after restructuring to PDCP.The RLC of receiver from successfully receive and the RLC PDU (such as, UMD PDU, AMDPDU and/or AMD PDU section) be stored in RLC reception buffer removes header, and the RLC PDU that recombinates, obtain complete RLC SDU thus.If make the RLC SDU of acquisition imperfect owing to losing PDU, then abandon this incomplete RLC SDU.RLC SDU after restructuring is sent to PDCP.The RLC SDU transmitted corresponds to PDCP PDU.According to the ascending order of SN, the RLC SDU after restructuring can be sent to PDCP.
In step S630, RLC SDU is sent to PDCP, discharges RLC afterwards.
In step S640, the PDCP of receiver, by the PDCP PDU be stored in PDCP reception buffer and/or from the PDCP PDU process that RLC sends, obtains PDCP SDU, afterwards the PCPSDU of acquisition is sent to upper strata.PDCP, by being decrypted and header decompression to the PDCP PDU be stored in PDCP reception buffer with from the PDCP PDU that RLC sends, obtaining complete PDCP SDU, is then stored in PDCP reception buffer by the PDCP SDU of acquisition.The whole complete PDCP SDU be stored in PDCP reception buffer is sent to the upper strata of PDCP.The upper strata of PDCP can be application layer etc., and it can receive and process PDCP SDU.According to the ascending order of SN, PDCU SDU can be sent to upper strata.
In step S650, PDCP SDU is sent to upper strata, discharges PDCP afterwards.
RB can be discharged under abnormal case.Such as, this is the channel status temporarily temporary transient not enough situation of deteriorated or Radio Resource between UE and network.By allowing, when discharging RB, previously received data are sent to upper strata, previous data can be kept when rebuilding RB and can data degradation be prevented.
Although there has been described the release of RLC and PDCP, technical characteristic of the present invention also can be applied to the situation for carrying out discharging to least two layers.Such as, in the above description, under ground floor is rlc layer and the second layer is the hypothesis of PDCP layer, the transmission block when discharging this and being two-layer.Technical characteristic of the present invention can also be applied to the situation when carrying out discharging for each layer forming another Radio interface protocols.
Fig. 7 is the concept map of the process that release RB is shown.RRC sends releasing request, to discharge RB to RLC and PDCP.In RLC, in RLC reception buffer, store the RLC PDU 705 of the RLC PDU 702 of SN=6, the RLC PDU 703 of SN=7 and SN=9, and the RLC PDU 701 of SN=5 and the RLC PDU 704 of SN=8 waits for received.In response to RLC releasing request, RLC extracts a RLC SDU 711 from the RLC PDU 702 of SN=6 and the RLC PDU 703 of SN=7, and, from the RLC PDU 705 of SN=9, extract the 2nd RLC SDU 712.An extracted RLC SDU 711 is sent to PDCP with the 2nd RLC SDU712 extracted, discharges RLC afterwards.
The RLC SDU 711 and the 2nd RLC SDU 712 that are sent to PDCP become a PDCPPDU and the 2nd PDCP PDU respectively.PDCP is by being decrypted respectively and header decompression the RLC SDU 711 sent from RLC and the 2nd RLC SDU 712, obtain a PDCP SDU 721 and the 3rd PDCPSDU 723, and obtained SDU is stored in PDCP reception buffer.In addition, PDCP obtains the 2nd PDCP SDU 722 from the PDCP PDU be previously stored in PDCP reception buffer, and is stored in PDCP reception buffer by obtained SDU.One PDCP SDU 721, the 2nd PDCP SDU 722 and the 3rd PDCP SDU 723 are sent to the upper strata of PDCP, discharge PDCP afterwards.
Fig. 8 is the block diagram that the wireless communication system realizing an embodiment of the invention is shown.Transmitter 50 and receiver 60 can be parts for subscriber equipment, base station or relay station.Transmitter 50 can comprise processor 51, memory 52 and radio frequency (RF) unit 53.Processor 51 can be configured to the function, step and/or the method that realize proposing in this specification.The layer of Radio interface protocols can realize in processor 51.Memory 52 and processor can be connected to each other in place of working, and store much information with Operation Processor 51.RF unit 53 and processor 11 can be connected to each other in place of working, and send and/or receive wireless signal.Receiver 60 can comprise processor 61, memory 62 and RF unit 63.Processor 61 can be configured to the function, step and/or the method that realize proposing in this specification.Memory 62 and processor can be connected to each other in place of working, and store much information with Operation Processor 61.RF unit 63 and processor 61 can be connected to each other in place of working, and send and/or receive wireless signal.
Processor 51,61 can comprise application-specific integrated circuit (ASIC) (ASIC), other chipset, logic power and/or data processing device.Memory 52,62 can comprise read-only memory (ROM), random access memory (RAM), flash memory, memory card, storage medium and/or other memory device.RF unit 53,63 can comprise baseband circuit to process wireless frequency signal.When execution mode realizes in software, technology described herein can realize by the module (such as, step, function etc.) performing function described herein.Module can be stored in memory 52,62 and to be performed by processor 51,61.Memory 52,62 in processor 51,61, or can be placed on processor 51,61 realization, can be connected to memory 51,61 communicatedly in the case by approach known in the art.
Consider example system presented here, describe the multiple methods realized according to disclosed theme with reference to multiple flow chart.Although for simplicity; these methods are illustrated and is described as a series of step or block; but what should understand and understand be; because some step can perform according to being different from order that is described and that introduce here or with other step executed in parallel, therefore theme required for protection is not limited to the order of described step or block.In addition, it will be understood by those skilled in the art that in flow chart, illustrative step is not unique, when not affecting the scope of the present disclosure and spirit, one or more step that can comprise other step or delete in the flow chart of example.
Content presented hereinbefore comprises the example of various aspects.Certainly, can not in order to describe various aspects object and introduce assembly or method often kind it is conceivable that combination, but it will be understood by those skilled in the art that multiple other combination and displacement be feasible.Therefore, this specification is intended to contain the whole replacements fallen in the spirit and scope of claims, amendment and modification.
Claims (2)
1. a method for releasing wireless loading in a wireless communication system, the method comprises the following steps:
From the radio resource control RRC layer of receiver to the wireless spread-spectrum technology rlc layer transmitting RLC radio bearer releasing request of described receiver;
From the described rrc layer of described receiver to the PDCP PDCP layer of described receiver transmission PDCP radio bearer releasing request, wherein transmit described RLC radio bearer releasing request and described PDCP radio bearer releasing request discharges RLC entity and PDCP entity respectively with request;
According to the ascending order of the sequence number SN of each RLC Service Data Unit SDU, RLC Service Data Unit SDU is transmitted from the described rlc layer of described receiver to the PDCP layer of described receiver, described RLC SDU successfully to receive and the one or more RLC Packet Data Unit PDU be stored in RLC reception buffer obtain before being binned in the transmission of described RLC radio bearer releasing request, wherein transmitted described RLC SDU is the described one or more RLC PDU successfully received by recombinating and the complete RLC SDU obtained by removing header to the described RLC PDU be stored in described RLC reception buffer,
After transmitting described complete RLC SDU to the PDCP layer of described receiver, discharge described RLC entity by the described rlc layer of described receiver;
After described RLC entity is released, according to the ascending order of the sequence number SN of each PDCP SDU, PDCP SDU is transmitted from the described PDCP layer of described receiver to upper strata, this PDCP SDU is obtained by the process PDCP PDU corresponding with described RLCSDU, wherein transmitted described PDCP SDU be by the PDCP SDU successfully received from described rlc layer before described PDCP radio bearer releasing request and PDCP reception buffer previously stored one or more PDCP PDU be decrypted and header decompression and the complete PDCP SDU that obtains; And
After described complete PDCP SDU is sent to described upper strata, discharge described PDCP entity.
2., for a device for releasing wireless loading in a wireless communication system, described device comprises:
For from the radio resource control RRC layer of receiver to the unit of the wireless spread-spectrum technology rlc layer transmitting RLC radio bearer releasing request of described receiver;
For from the described rrc layer of described receiver to the unit of the PDCP PDCP layer of described receiver transmission PDCP radio bearer releasing request, wherein transmit described RLC radio bearer releasing request and described PDCP radio bearer releasing request discharges RLC entity and PDCP entity respectively with request;
For the ascending order of the sequence number SN according to each RLC Service Data Unit SDU, transmit the unit of RLC Service Data Unit SDU to the PDCP layer of described receiver from the described rlc layer of described receiver, described RLCSDU successfully to receive and the one or more RLC Packet Data Unit PDU be stored in RLC reception buffer obtain before being binned in the transmission of described RLC radio bearer releasing request, wherein transmitted described RLC SDU is the described one or more RLC PDU successfully received by recombinating and the complete RLC SDU obtained by removing header to the described RLC PDU be stored in described RLC reception buffer,
For after transmitting described complete RLC SDU to the described PDCP layer of described receiver, the unit of release RLC entity;
For after described RLC entity is released, according to the ascending order of the sequence number SN of each PDCP SDU, the unit of PDCP SDU is transmitted from the described PDCP layer of described receiver to upper strata, this PDCP SDU is obtained by the process PDCP PDU corresponding with described RLC SDU, wherein transmitted described PDCP SDU be by the PDCP SDU successfully received from described rlc layer before described PDCP radio bearer releasing request and PDCP reception buffer previously stored one or more PDCP PDU be decrypted and header decompression and the complete PDCP SDU obtained, and
After being sent to upper strata at described complete PDCP SDU, the unit of release PDCP entity.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| US61/142,257 | 2009-01-02 | ||
| KR1020090095995A KR101563008B1 (en) | 2008-12-26 | 2009-10-09 | Method of releasing radio bearer in wireless communication system and receiver |
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| PCT/KR2009/007433 WO2010074441A2 (en) | 2008-12-26 | 2009-12-11 | Method of releasing radio bearer in wireless communication system and receiver |
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| CN101854735B (en) * | 2010-04-30 | 2016-02-10 | 中兴通讯股份有限公司 | The data processing method of rlc layer and PDCP layer during RRC Connection Release under a kind of LTE standard |
| CN103392374B (en) * | 2012-01-06 | 2016-08-10 | 华为技术有限公司 | The method and apparatus that data process |
| KR102164988B1 (en) * | 2013-04-30 | 2020-10-13 | 한국전자통신연구원 | Method of receiving data for user equipment |
| WO2015066923A1 (en) * | 2013-11-11 | 2015-05-14 | 华为技术有限公司 | Data transmission method and device |
| CN105025593B (en) * | 2014-04-23 | 2020-07-28 | 电信科学技术研究院 | Method and equipment for releasing entity |
| CN105323044B (en) * | 2014-07-15 | 2018-09-25 | ***通信集团公司 | A kind of data dispatching method, device and with interior relaying |
| CN107979853B (en) * | 2016-10-25 | 2022-08-02 | 中兴通讯股份有限公司 | Data transmission method and device, user equipment and base station |
| KR102464567B1 (en) * | 2017-01-16 | 2022-11-09 | 삼성전자 주식회사 | Method and apparatus for data processing in a wireless communication system |
| CN108347727B (en) * | 2017-01-24 | 2023-04-07 | 中兴通讯股份有限公司 | Data transmission method and device |
| WO2018169341A1 (en) | 2017-03-16 | 2018-09-20 | Samsung Electronics Co., Ltd. | Network-initiated pdu session connection update method between terminal and network |
| KR102255051B1 (en) | 2017-04-01 | 2021-05-24 | 후아웨이 테크놀러지 컴퍼니 리미티드 | Data processing method and device |
| US10609589B2 (en) * | 2017-06-02 | 2020-03-31 | Motorola Mobility Llc | Determining data available for transmission |
| WO2019023862A1 (en) | 2017-07-31 | 2019-02-07 | Oppo广东移动通信有限公司 | Data processing method and product related thereto |
| CN109548194B (en) * | 2017-08-17 | 2021-07-16 | 维沃移动通信有限公司 | Data processing method, sending end and receiving end |
| CN108112019B (en) * | 2018-01-02 | 2021-05-18 | 重庆邮电大学 | Narrow-band Internet of things and different-system interference avoidance method based on honeycomb |
| US11212720B2 (en) * | 2018-10-16 | 2021-12-28 | Mediatek Inc. | 5GSM handling on invalid PDU session |
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| KR100896484B1 (en) * | 2002-04-08 | 2009-05-08 | 엘지전자 주식회사 | Data transmission mobile communication method and apparatus in mobile communication system |
| US7701890B2 (en) * | 2004-02-04 | 2010-04-20 | Lg Electronics Inc. | Apparatus and method of releasing a point-to-multipoint radio bearer |
| US20060077993A1 (en) * | 2004-10-12 | 2006-04-13 | Eaton Corporation | Method of managing communication buffers for a plurality of communication layers and node employing the same |
| KR100938090B1 (en) * | 2006-10-19 | 2010-01-21 | 삼성전자주식회사 | Method and apparatus for performing handover in mobile telecommunication system |
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| KR101563008B1 (en) | 2015-11-02 |
| KR20100076866A (en) | 2010-07-06 |
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