CN1859073A - Dow data repeating method in radio communication system - Google Patents
Dow data repeating method in radio communication system Download PDFInfo
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- CN1859073A CN1859073A CNA2005100977845A CN200510097784A CN1859073A CN 1859073 A CN1859073 A CN 1859073A CN A2005100977845 A CNA2005100977845 A CN A2005100977845A CN 200510097784 A CN200510097784 A CN 200510097784A CN 1859073 A CN1859073 A CN 1859073A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/1874—Buffer management
Abstract
This invention discloses a re-transmission method for down data in a radio communication system, which moves the re-transmission function of the RLC layer originally realized in the RNC to the MAC layer in a base station to be realized by the re-transmission instruction fed back by the MAC-e PDU carried user device of the HSUPA, in which, the base station buffer-stores the down data packet from the RLC layer in the MAC layer then transmits it to UE, the MAC-e sub-layer of which multiplexes the re-transmission instruction in the MAC-e PDU and sends it to the base station, the MAC-e PDU of which solves the instruction and refreshes the MAC layer buffer-storage and re-transmits error data packets.
Description
Technical field
The present invention relates to the 3G (Third Generation) Moblie technology, particularly the repeating method of 3-G (Generation Three mobile communication system) downlink data.
Background technology
Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple Access, be called for short " WCDMA ") be one of international standard of International Telecommunications Union's (International Telecommunications Union is called for short " ITU ") Global 3G mobile communication of admitting.Also can be described as the 3-G (Generation Three mobile communication system) that puts it into commercial operation the earliest in the world, is the standard of European 3-G (Generation Three mobile communication system) Frequency Division Duplexing (FDD) (Frequency Division Duplex is called for short " FDD ") frequency range simultaneously.
WCDMA is the cdma system that adopts direct sequence spread spectrum (DSSS) technology, and it expands to user bandwidth more than 1000 times by spreading code, expands channel width to 5MHz.According to information-theoretical theory, can under the situation of low signal-to-noise ratio very, transmit information reliably like this with same transmission rate.Strengthen antijamming capability greatly, realize code division multiple access, can support various user data rate.
WCDMA protocol version the earliest is R99, and in this version, the carrying of uplink and downlink business all is based on dedicated channel, and the message transmission rate that can reach is 384Kbps.But along with the user is more and more higher to the demand of transmitting high speed data, the procotol of having released R4, R5, R6 three phases is subsequently successively organized in the WCDMA standard formulation, introduced high speed downlink packet access (High SpeedDownlink Packet Access, be called for short " HSDPA ") technology and high speed uplink packet access (HighSpeed Uplink Packet Access, be called for short " HSUPA ") technology, peak rate up to 14.4Mbps and 5.76Mbps can be provided respectively, simultaneously, also improved spectrum efficiency greatly.
The main feature of HSDPA comprises in the R5 version: the short frame that adopts 2ms, adopt mixed self-adapting repeat requests (Hybrid Automatic Repeat Request in physical layer, be called for short " HARQ ") and adaptive modulation and coding (Adaptive Modulation and Coding, be called for short " AMC ") technology, introduced high order modulation to improve the availability of frequency spectrum, realize the shared channel scheduling of each subscriber equipment (User Equipment, abbreviation " UE ") by sign indicating number branch and time-division.HARQ specification requirement NodeB (base-station node) sent data to UE after, need obtain the reply data of UE feedback acknowledgment ACK (affirmation)/NACK (do not have confirm) and judge whether UE correctly receives these data, so that decision is data retransmission or New Development data.HSDPA has increased by two physical channels descending, one is high-speed physical downlink shared channel (HS-PDSCH) (High Speed Physicai Downlink Shared Channel, be called for short " HS-PDSCH "), be used to carry user's data information, another is High-Speed Shared Control Channel (High Speed Shared Control Channel, be called for short " HS-SCCH "), be used to carry the required signaling of demodulation companion data channel HS-PDSCH.In addition, HSDPA is at a up High-Speed Dedicated Physical Control Channel (the High Speed-Dedicated Physicai Control Channel that increased, be called for short " HS-DPCCH "), this channel is used to carry the feeding back downlink Frame by high-speed physical downlink shared channel (HS-PDSCH) (High Speed Physical Downlink Shared Channel, abbreviation " HS-PDSCH ") the information A CK/NACK of reception correctness, perhaps be used for feedback channel quality indication (ChannelQuality Indicator is called for short " CQI ").Simultaneously, at media interviews control (Medium AccessControl, abbreviation " MAC ") layer has also increased high speed media access control (Medium AccessControl-high speed, abbreviation " MAC-hs ") Flow Control of HSDPA is supported in the sublayer, fast dispatch/priority management, HARQ and transport format resource indication (Transport Format and ResourceIndicator is called for short " TFRI ") are selected.MAC-hs is positioned under another sublayer MAC-d (d refers to special use) of MAC layer, on the physical layer.
The main feature of HSUPA comprises in the R6 version: adopt short frame of 2ms or 10ms frame, adopt HARQ, up base station fast dispatch technology etc. in physical layer.In order to realize the high-efficiency transfer of user uplink data, HSUPA requires newly-increased two uplink physical channels for the user, one is enhancing Dedicated Physical Data Channel (the Enhance-Dedicated Physical Data Channel of transmission data, be called for short " E-DPDCH "), another is enhancing Dedicated Physical Control Channel (the Enhance-Dedicated Physical Control Channel of transmission accompanied by physical layer signaling, be called for short " E-DPCCH "), the latter provides the signaling of following for the former demodulation.In order to control user's uplink speed, down channel has increased absolute grant channel (E-AGCH) and relative authorization channel (E-RGCH), absolute grant channel only exists in service wireless connections sub-district, be used to the peak transfer rate of indicating user uplink to transmit, the frequency ratio of adjusting is lower; The relative authorization channel can exist in service wireless connections and non-service wireless connections sub-district, is used to indicate the user to adjust uplink speed by certain step pitch, and the frequency ratio of adjustment is higher, reaches as high as every 2ms once.Whether correct also increased the channel of indicating the transmission of up process data in down channel, whether the data that are used to tell the user to send are correct, if incorrect, the user will initiate re-transmission, otherwise the user sends new data.Except physical layer increases channel, in order to cooperate HSUPA, in the MAC layer, introduce MAC-e (e refers to strengthen) and two sublayers of MAC-es again, to support HARQ and fast dispatch, simultaneously, can utilize MAC-e protocol Data Unit (MAC-e Protocol Data Unit, be called for short " MAC-e PDU ") carrier signaling and this signaling is read out at the MAC-e of base station layer.When in the MAC-e sublayer, forming MAC-e PDU, can multiplexing signaling MAC-es PDU, just a plurality of MAC-es PDU are integrated into MAC-e PDU.MAC-e and MAC-es are between physical layer and the MAC-d.In the UE side, the data that correspondence strengthened the different MAC-d streams of dedicated channel (Enhance-Dedicate Channel is called for short " E-DCH ") are merged together, and pass to physical layer; In universal land radio access web (Universal Terrestrial Radio Access Network, be called for short " UTRAN ") side, will sort from the number of times of the data based re-transmission of physical layer, and be decomposed into different MAC-d stream.
The WCDMA protocol architecture on physical layer, is medium access control (MAC) layer, Radio Link control (Radio Link Control is called for short " RLC ") layer and other high levels as shown in Figure 1.In the WCDMA system affirmation pattern (Acknowledged Mode, be called for short " AM ") under, if error of transmission appears in data, just correct by retransmitting.When the physical layer retransmission number of times reaches the given greatest physical layer number of retransmissions of system, and physical layer is not when still correctly receiving data, in order further to ensure the correctness of transfer of data, prevent the HARQ error of transmission of physical layer, the receiving terminal rlc layer is according to rlc protocol data cell (the Protocol Data Unit that receives, abbreviation " PDU ") sequence number situation request rlc layer retransmits, and the transmitting terminal rlc layer receives this request will start the rlc layer re-transmission.That is to say that when physical layer retransmission was failed, system need start rlc layer, even more high-rise re-transmission.
Wherein, the transmission mode of rlc layer please refer to document 3GPP TS 25.322: " RLC ProtocolSpecification " " (rlc protocol detail) V6.4.0 and 3GPP TS 25.301: " Radio InterfaceProtocol Architecture " (Radio interface protocols system) V6.3.0
At present, in the WCDMA system, physical layer and part MAC layer are positioned at the base station, rlc layer and above more high-rise radio network controller (the Radio Network Controller that is positioned at, be called for short " in the RNC "), the interface data transmission mode of standard is arranged between base station and the radio network controller.Under the AM pattern,, just need start re-transmission and guarantee that business datum correctly transmits by rlc layer if physical layer can not be by retransmitting the error of transmission of correction of data.The rlc layer retransmission processes of downlink transfer is:
1) at UTRAN end, and the RLC Service Data Unit that rlc layer will pass from high level (ServiceData Unit is called for short " SDU ") is through over-segmentation or merge the equal-sized RLC AMDPDU (affirmation mode RLC PDU) of generation.Wherein the size of RLC AMD PDU is to be determined by parameter A MD RLCsize (the RLC size under the affirmation mode).It is to be sent that the AMD PDU that obtains just is placed into buffer area of re-transmission etc.
2) at UE end, the MAC layer will receive MAC PDU and remove the PDU that obtains rlc layer after the data head of MAC layer, and it is passed to rlc layer.At rlc layer, confirm by the sequence number of AMD PDU whether RLC AMD PDU is correctly received.If correct the reception then sends the UTRAN rlc layer of confirmation to equity, if correctly do not received, need to retransmit, then send the UTRAN rlc layer of the information of request repeat to equity.
3) at the UTRAN end, rlc layer is done different operations according to the UE confirmation or the re-send request may that receive.If receive the confirmation, just no longer send this RLC AMD PDU, and refresh the metadata cache of RLCAMD PDU.If receive re-send request may, and surpass rlc layer and retransmit number of times, the RLC AMD PDU that then will need to retransmit puts into that the buffer area of re-transmission is medium to be sent, and this data block will be passed to the base station again, is carried to UE by the physical channel of base station.
In actual applications, there is following problem in such scheme: retransmission delay time is long, and the rlc layer buffer memory of RNC is big.
Cause the main cause of this situation to be, in existing RLC retransmission protocol, owing to the definition of feedback information is finished on rlc layer, so transmitting terminal just can parse the receiving feedback information of receiving terminal at rlc layer.Retransmit specific to descending rlc layer, the UE end leaves the RLC AMDPDU that receives in the RLC buffer area of reception in earlier, all receives until the RLCAMD PDU of a complete RLC SDU correspondence.Rlc layer judges by the sequence number of RLC AMD PDU whether whole RLC AMD PDU of this RLC SDU correspondence are correctly received.If RLC AMD PDU loses, then the re-transmission indication request that sends by the UE transmitting terminal is retransmitted.Then at the rlc layer of UTRAN receiving terminal, the content analysis of the re-transmission indication that UE is sended over is come out, and judges whether this RLC AMD PDU needs to retransmit.This process need Iub/Iur interface transmits information, and therefore the time of cost is long.Because RLC is among the RNC, so the re-transmission of RLC relates to RNC and handles, and handle and the transfer of data between the two base station, and too much intermediate link is handled and caused propagation delay time long equally.
In addition, if the rlc layer of UTRAN does not receive the status report that the rlc layer institute feedback data of UE equity has correctly received, just need keep these data at rlc layer, for carrying high-speed data service stream, be easy to cause the cache resources anxiety of RNC, and influence its disposal ability.
Summary of the invention
In view of this, main purpose of the present invention is to provide the Dow data repeating method in a kind of wireless communication system, makes the re-transmission time significantly reduce, and packet significantly reduces at the buffer memory of RNC side, and the disposal ability of RNC gets a promotion.
For achieving the above object, the invention provides the Dow data repeating method in a kind of wireless communication system, comprise following steps:
The base station will wrap in designated layer buffer memory rear line equipment from the downlink data on upper strata and send;
The upper strata of described subscriber equipment generates according to the check result to the received data packet correctness and retransmits indication, and the designated layer of this subscriber equipment will retransmit the protocol Data Unit that indication is multiplexed into this designated layer, and send to described base station;
The designated layer of described base station is received the re-transmission indication that solves behind the described protocol Data Unit wherein, and by this designated layer by this re-transmissions indication refresh described designated layer buffer memory and will be in this buffer memory by correct data packets for transmission again to described subscriber equipment transmission;
Wherein, all comprise described designated layer in described base station and the subscriber equipment, the designated layer in this subscriber equipment has the function that top signaling is multiplexed into the up protocol Data Unit of this designated layer, and the designated layer in this base station has corresponding demultiplexing function.
Wherein, described designated layer is the MAC layer;
Send data and check that the described upper strata of received data packet correctness is a rlc layer to designated layer.
In this external described method, realize that by the MAC-e sublayer in the described MAC layer multiplexing, demultiplexing retransmits the function of indication.
In this external described method, described downlink data packet from the upper strata is the RLC conformation mode protocol data unit, described MAC is packaged into buffer memory behind the MAC-d protocol Data Unit with the RLC conformation mode protocol data unit, wherein, the RLC conformation mode protocol data unit is corresponding one by one with the MAC-d protocol Data Unit;
If described MAC layer knows that by described re-transmission indication the RLC conformation mode protocol data unit is not correctly transmitted, then the pairing MAC-d protocol Data Unit of this RLC conformation mode protocol data unit in the described MAC layer buffer memory is sent to described subscriber equipment again.
In this external described method, can comprise one of following information or its combination in any in the described re-transmission indication:
The relative list information of the list information of the affirmation information of the descending RLC conformation mode protocol data unit that has correctly been received, mobile receiver window confirmation, the RLC conformation mode protocol data unit that correctly do not received and the RLC conformation mode protocol data unit that is not correctly received.
In this external described method, described MAC-e protocol Data Unit is carried on the up special-purpose data channel that strengthens that high speed uplink packet inserts.
In this external described method, in the described step that refreshes MAC layer buffer memory, the packet that one of meets the following conditions in the described MAC layer buffer memory is updated to new data packets to be passed:
Described re-transmission indication is confirmed as by correct and is received or retransmit the frequency of failure and reach and preset thresholding.
In this external described method, described packet can be the packet of carrying real time business.
In this external described method, described data re-transmission is the re-transmission of high speed descending grouping access data.
In this external described method, described wireless communication system can be one of following or its evolution system:
Broadband CDMA system, ofdm system, and multi-input multi-output system.
By relatively finding, the main distinction of technical scheme of the present invention and prior art is, the MAC layer that the functions of retransmission of the rlc layer of originally realizing in RNC moves down in the base station is realized, utilized the MAC-e PDU of HSUPA to carry the re-transmission indication that subscriber equipment feeds back.The base station will be sent to subscriber equipment after will wrapping in MAC layer buffer memory from the downlink data of rlc layer, the MAC-e sublayer of subscriber equipment will retransmit indication and multiplexingly be sent to the base station in MAC-e PDU, and the MAC-e sublayer of base station solves from MAC-e PDU and retransmits indication and refreshes MAC layer buffer memory in view of the above and retransmit error data packets.
Difference on this technical scheme has brought comparatively significantly beneficial effect, promptly retransmits greatly and accelerates.Because move on to the base station realization retransmitting from RNC, so path contraction that whole retransmission processes is related, the two that retransmits the path in the prior art is RNC and UE, the centre also will be through the transfer of base station, using two of rear path of the present invention is base station and UE, the base station is in the time-delay of Iub mouth and RNC interaction process when also having cancelled descending rlc layer retransmitting when shortening the path, this makes the data transmission delay that data re-transmission is eated dishes without rice or wine around, thereby save the re-transmission time greatly, reduced the time delay of downlink transfer greatly, help the service quality QoS guarantee of delay sensitive business, improve the user experience impression.Problems such as sound sluggishness, image be discontinuous have been reduced or eliminated.
The rlc layer buffer memory of RNC side can be cancelled.Rlc layer retransmission mechanism of the prior art has caused the rlc layer buffer memory of RNC bigger, for carrying high-speed data service stream, may cause RNC cache resources anxiety.Because if the rlc layer of RNC does not receive the status report that the user UE rlc layer feedback data of equity has correctly received, will keep these data, under high-speed data service, be easy to cause cache resources anxiety and the disposal ability of RNC limited.If realize the functions of retransmission of rlc layer in the base station, then the AMD PDU metadata cache of rlc layer can discharge, and is replaced by the buffer memory in the base station.Because the base station can obtain the information whether AMD PDU correctly receives fast, therefore can receive correct data-block cache by rapid release, make the corresponding A MDPDU data volume of base station actual needs buffer memory reduce greatly, therefore totally can promote the device processes ability of UTRAN and save cost.
Simplified protocol infrastructure.Because realize the function of " rlc layer re-transmission " in the base station, the UTRAN side only need be carried out the re-transmission of physical layer, so can simplify protocol infrastructure.The function of " rlc layer re-transmission " is realized in the base station simultaneously, has reduced the bandwidth consumption that the data re-transmission between base station and the RNC is brought, and improves the effective rate of utilization of Iub interface.
Can carry real time business.Because propagation delay time significantly reduces after the use the solution of the present invention, make existing Unacknowledged Mode bearer service can become by the affirmation mode carrying, such as real time business.By the affirmation mode carrying, these professional transmission reliabilities can improve greatly.
Description of drawings
Fig. 1 is the protocol architecture figure of WCDMA in the prior art;
Fig. 2 is the structure chart of RLC AMD PDU;
Fig. 3 is that the UE side will retransmit the schematic diagram that indication is multiplexed into MAC-e PDU and MAC-e PDU generative process in a preferred embodiment of the present invention;
Fig. 4 is the ACK SUFI structural representation that retransmits in a preferred embodiment of the present invention in the indication;
Fig. 5 is the process schematic diagram of the MAC-e PDU that demultiplexing UE in base station sends in a preferred embodiment of the present invention;
Fig. 6 is the HARQ re-transmission Enhancement Method flow chart according to a preferred embodiment of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Core of the present invention is, the re-transmission of rlc layer is moved down into inside of base station, makes data re-transmission around in the data transmission delay of eating dishes without rice or wine, thereby has saved the re-transmission time greatly, can reach the requirement of carrying real time business.Simultaneously, the re-transmission of rlc layer moves down and makes the packet that is buffered in the RNC side significantly reduce, and has alleviated the problem of RNC cache resources anxiety, and has promoted the disposal ability of RNC.Specifically, in the base station, set up the MAC buffer memory that is used for store M AC-d PDU exactly, and the data retransmission in the rlc layer is stored in the MAC buffer memory in the base station.Data in the MAC buffer memory send UE to by physical layer and air interface again.UE sends rlc layer to after the data that receive are handled through physical layer and MAC layer, judges by rlc layer whether the data that send are correctly received from the base station, and generates and retransmit indication, sends the MAC-e layer of UE to.The MAC-e layer of UE is multiplexed into MAC-e PDU with data and the re-transmission indication that rlc layer comes, and sends to the base station by physical layer and air interface.The base station sends the data that receive after by physical layer process to the MAC-e layer of base station, by the MAC-e layer these data are carried out demultiplexing again, obtain the re-transmission indication of UE, and judge that by the content that retransmits indication which data is correctly received by UE, which data needs is retransmitted.With the Data Update that has correctly received in the buffer memory is new data, for there not being the correct data that receive, the re-transmission fast of eating dishes without rice or wine of data is initiated in the base station by descending HSDPA, and keep these data simultaneously in buffer memory, reach preset gate in limited time until receiving the indication that UE correctly received or retransmitting the frequency of failure, just packet is updated to new data packets to be passed.
Below in conjunction with accompanying drawing 6, the first embodiment of the present invention is described.Need to prove that present embodiment is the data re-transmission that is applied to HSDPA in the WCDMA system.
In step 610, the UTRAN side is set up the MAC buffer memory that is used for store M AC-d PDU in the base station, and the data retransmission in the rlc layer is stored in the MAC buffer memory in the base station.Because the packet that is stored among the RLC is RLC AMD PDU, so the MAC in the base station must be first be packaged into buffer memory behind the MAC-d PDU with RLC AMDPDU, RLC AMD PDU and MAC-dPDU concern one to one in the present embodiment.Persons of ordinary skill in the art may appreciate that the PDU of rlc layer and the PDU of buffer memory also can be one-to-many or many-to-one relation, and processing method does not depart from spirit of the present invention.
Because, base station side comprises physical layer and part MAC layer, and rlc layer and more high-risely do not have in base station side, upstream data will be delivered to the RNC side just can obtain rlc layer and more high-rise processing, the information interaction of RNC and base station need be passed through the Iub/Iur interface, if therefore the data that retransmit need not to send the base station to by the RNC that has rlc layer, sends to UE by the base station by physical layer and air interface again, but directly send to UE by the base station, can reduce propagation delay time.Simultaneously, because data retransmission moves down in the MAC layer buffer memory of base station, alleviated the problem of RNC cache resources anxiety from the rlc layer buffer memory of RNC.Both just under high-speed data service, also be not easy to cause the cache resources of RNC nervous and disposal ability is limited.
The UTRAN side just can enter step 620 after the data retransmission in the rlc layer is cached to MAC layer in the base station, and the base station sends data retransmission to physical layer, sends the data to UE by physical layer by air interface.
Then, enter step 630, the rlc layer of UE is checked the correctness of packet and is generated and retransmits indication.UE checks the correctness of this packet at rlc layer behind the packet that the base station sent that receives the UTRAN side.Because the packet that receives at rlc layer is RLC AMD PDU, the structure of RLC AMD PDU as shown in Figure 2, the transmission sequence number of wherein carrying has shown the order of data packet transmission.Therefore, in RLC, just can check the correctness of data packet transmission according to the transmission sequence number of the RLC AMD PDU that receives.After rlc layer is checked this packet, generate and retransmit indication, indicate which data and correctly received, after which data needs the base station of UTRAN side to retransmit.
The definition of STATUSPDU in re-transmission indication (can be described as STATUS message again) and the existing system among the RLC and content class seemingly can comprise being not limited to following content:
The positive acknowledgement information (ACK SUFI) of the AMD PDU that receives;
Mobile receiver window confirmation (MRW SUFI ACK);
Show the List information (LIST SUFI) that does not have the correct AMD PDU that receives;
The Relative List information (Relative LIST SUFI) that does not have the correct AMD PDU that receives.
Wherein, the formal definition of the affirmation information of the descending RLC AMD PDU that has correctly been received as shown in Figure 4, LSN represents last transmission sequence number, is used to represent that the data of transmission sequence number before LSN of RLC AMD PDU are all correctly received.List (tabulation) information of the RLC AMD PDU that is not correctly received has all shown the RLC AMD PDU that does not correctly receive with the Relative List of the RLC AMD PDU that is not correctly received (relative tabulation) information, provides first not number of the RLC AMD PDU of the lasting mistake of transmission sequence number and back of the correct RLC AMD PDU that receives in the List information; Relative List has shown the transmission sequence number of the RLC AMD PDU that first is wrong, and and the distance (at interval) of next wrong RLC AMD PDU.
Then, enter step 640, UE generates MAC-e PDU and sends.The MAC-e sublayer of UE will be in step 630 after the re-transmission indication that generates of RLC is multiplexed into MAC-e PDU, and the E-DPDCH by HSUPA sends to the base station.Retransmit generative process that indication is multiplexed into MAC-e PDU and MAC-e PDU as shown in Figure 3, on existing HSUPA basis, increase the situation that UE side rlc layer correctly receives RLC AMD PDU that indicates that retransmits.Multiplexing by this re-transmission indication and other MAC-es PDU, be created on a data block transmitted MAC-ePDU in E-DPDCH.And in data description indication (Data Description Indicator is called for short " the DDI ") definition of MAC-es PDU, increase a kind of particular value.DDI is MAC-e packet packet header, is used for the discriminate between logical channel, the size of the MAC-d PDU of a MAC-d stream and a MAC-es PDU cascade.In DDI, increase a kind of particular value (such as 0), be used for the corresponding indication that retransmits, represent that its corresponding MAC-es PDU is a rlc layer accepting state confirmation.
The base station of UTRAN side enters step 650 after receiving the MAC-e PDU of UE transmission, solves the re-transmission indication among the MAC-e PDU.Because it is multiplexing in MAC-e PDU that UE will retransmit indication, so the base station of UTRAN side can parse the indication of the re-transmission among the MAC-e PDU by demultiplexing process (as shown in Figure 5).And know that according to the affirmation information that retransmits the descending RLC AMD PDU that has correctly been received in the indication UE receives the situation of RLC AMD PDU.
Then, enter step 660, the MAC layer in the base station refreshes MAC layer buffer memory according to the re-transmission indication that solves and will do not sent to described subscriber equipment again by correct data packets for transmission in this buffer memory in step 650.Because in step 650, the base station can know that UE receives the situation of RLC AMD PDU, that is to say that the base station can know which RLC AMD PDU is correctly received by the base station, which RLC AMD PDU is not correctly received by UE as yet.For by correctly receive or retransmit the frequency of failure reach preset thresholding RLC AMD PDU, by the corresponding relation of MAC-d PDU and RLC AMD PDU, corresponding with it MAC-d PDU is updated to new data packets to be passed; For the RLC AMD PDU that is not correctly received as yet by UE, same corresponding relation by MAC-d PDU and RLC AMD PDU, corresponding with it MAC-d PDU is sent to UE, and in the MAC buffer memory, preserve these data, reach and preset thresholding until receiving the indication that UE correctly received or retransmitting the frequency of failure.
Present embodiment is by having preserved the data that need re-transmission at the MAC of base station layer, and in the UE side re-transmission of RLC AMD PDU indication is carried among the MAC-e PDU and passes to the base station, make the base station after receiving MAC-e PDU and parsing wherein re-transmission indication, can directly in the base station, initiate to retransmit, significantly reduced propagation delay time, therefore, the packet of re-transmission also can be the packet of carrying real time business.In addition, owing to can directly initiate to retransmit in the base station, therefore, the AMD PDU metadata cache of rlc layer can be released, and, because the base station can obtain the information whether AMD PDU correctly receives fast, make the cache size of in the base station, safeguarding also less than the buffer memory of former rlc layer, therefore totally promoted the device processes ability of UTRAN and provided cost savings.
Those having ordinary skill in the art will appreciate that, though being the basis with WCDMA, the foregoing description describes, but also can easily technical scheme of the present invention be applied to similar wireless communication system, as OFDM (Orthogonal Frequency Division Multiplexing, abbreviation " OFDM ") system, multiple-input and multiple-output (Multipie Input Multiple Output is called for short " MIMO ") system etc.
Though by with reference to some preferred embodiment of the present invention, the present invention is illustrated and describes, those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (10)
1. the Dow data repeating method in the wireless communication system is characterized in that, comprises following steps:
The base station will wrap in designated layer buffer memory rear line equipment from the downlink data on upper strata and send;
The upper strata of described subscriber equipment generates according to the check result to the received data packet correctness and retransmits indication, and the designated layer of this subscriber equipment will retransmit the protocol Data Unit that indication is multiplexed into this designated layer, and send to described base station;
The designated layer of described base station is received the re-transmission indication that solves behind the described protocol Data Unit wherein, and by this designated layer by this re-transmissions indication refresh described designated layer buffer memory and will be in this buffer memory by correct data packets for transmission again to described subscriber equipment transmission;
Wherein, all comprise described designated layer in described base station and the subscriber equipment, the designated layer in this subscriber equipment has the function that top signaling is multiplexed into the up protocol Data Unit of this designated layer, and the designated layer in this base station has corresponding demultiplexing function.
2. the Dow data repeating method in the wireless communication system according to claim 1 is characterized in that, described designated layer is the MAC layer;
Send data and check that the described upper strata of received data packet correctness is a rlc layer to designated layer.
3. the Dow data repeating method in the wireless communication system according to claim 2 is characterized in that, realizes that by the MAC-e sublayer in the described MAC layer multiplexing, demultiplexing retransmits the function of indication.
4. the Dow data repeating method in the wireless communication system according to claim 3, it is characterized in that, described downlink data packet from the upper strata is the RLC conformation mode protocol data unit, described MAC is packaged into buffer memory behind the MAC-d protocol Data Unit with the RLC conformation mode protocol data unit, wherein, the RLC conformation mode protocol data unit is corresponding one by one with the MAC-d protocol Data Unit;
If described MAC layer knows that by described re-transmission indication the RLC conformation mode protocol data unit is not correctly transmitted, then the pairing MAC-d protocol Data Unit of this RLC conformation mode protocol data unit in the described MAC layer buffer memory is sent to described subscriber equipment again.
5. the Dow data repeating method in the wireless communication system according to claim 4 is characterized in that, can comprise one of following information or its combination in any in the described re-transmission indication:
The relative list information of the list information of the affirmation information of the descending RLC conformation mode protocol data unit that has correctly been received, mobile receiver window confirmation, the RLC conformation mode protocol data unit that correctly do not received and the RLC conformation mode protocol data unit that is not correctly received.
6. the Dow data repeating method in the wireless communication system according to claim 3 is characterized in that, described MAC-e protocol Data Unit is carried on the up special-purpose data channel that strengthens that high speed uplink packet inserts.
7. the Dow data repeating method in the wireless communication system according to claim 2 is characterized in that, in the described step that refreshes MAC layer buffer memory, the packet that one of meets the following conditions in the described MAC layer buffer memory is updated to new data packets to be passed:
Described re-transmission indication is confirmed as by correct and is received or retransmit the frequency of failure and reach and preset thresholding.
8. the Dow data repeating method in the wireless communication system according to claim 1 is characterized in that, described packet can be the packet of carrying real time business.
9. according to the Dow data repeating method in each described wireless communication system in the claim 1 to 8, it is characterized in that described data re-transmission is the re-transmission of high speed descending grouping access data.
10. according to the Dow data repeating method in each described wireless communication system in the claim 1 to 8, it is characterized in that described wireless communication system can be one of following or its evolution system:
Broadband CDMA system, ofdm system, and multi-input multi-output system.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100977845A CN100438397C (en) | 2005-08-29 | 2005-08-29 | Dow data repeating method in radio communication system |
| PCT/CN2006/002040 WO2007025454A1 (en) | 2005-08-29 | 2006-08-11 | Method and system of wireless communication down data retransmission |
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| CNB2005100977845A CN100438397C (en) | 2005-08-29 | 2005-08-29 | Dow data repeating method in radio communication system |
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| CN1859073A true CN1859073A (en) | 2006-11-08 |
| CN100438397C CN100438397C (en) | 2008-11-26 |
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| WO (1) | WO2007025454A1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2008134926A1 (en) * | 2007-04-30 | 2008-11-13 | Alcatel Shanghai Bell Co., Ltd. | Method and communication system and the sender side device for realizing the inquiry processing on data packets |
| CN101924618A (en) * | 2009-06-12 | 2010-12-22 | 重庆重邮信科通信技术有限公司 | Implementation method of HARQ in TD-HSUPA |
| CN101197646B (en) * | 2007-12-28 | 2011-04-27 | 北京天碁科技有限公司 | Data transmission method based on HSUPA |
| CN102137441A (en) * | 2010-12-22 | 2011-07-27 | 华为技术有限公司 | method, device and system for data transmission |
| CN102547687A (en) * | 2010-12-23 | 2012-07-04 | 上海贝尔股份有限公司 | Method and device for processing data packet in wireless communication network |
| CN101222485B (en) * | 2007-01-08 | 2012-10-10 | 上海无线通信研究中心 | MAC multiplexing and de-multiplexing method used for medium access control layer |
| CN101617496B (en) * | 2007-01-08 | 2012-11-07 | 交互数字技术公司 | Method and apparatus for multicasting with feedback information |
| CN101631008B (en) * | 2008-07-15 | 2013-02-13 | 电信科学技术研究院 | Method and device for informing load state |
| CN110875761A (en) * | 2018-08-31 | 2020-03-10 | 上海诺基亚贝尔股份有限公司 | Method and device for reducing file loss rate through cross-layer scheduling |
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| CN101150340B (en) * | 2007-10-19 | 2011-04-20 | 华为技术有限公司 | A method and device for enhancing UPA cell coverage |
| CN108322936B (en) * | 2017-01-16 | 2023-06-02 | 中兴通讯股份有限公司 | Data retransmission method and device |
| CN111130705A (en) * | 2018-10-31 | 2020-05-08 | 中国移动通信有限公司研究院 | Method and equipment for sending data packet |
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| FI101332B (en) * | 1995-12-18 | 1998-05-29 | Nokia Telecommunications Oy | Discontinuous transmission in a multi-channel high-speed data transmission |
| US20030039226A1 (en) * | 2001-08-24 | 2003-02-27 | Kwak Joseph A. | Physical layer automatic repeat request (ARQ) |
| EP1337066B1 (en) * | 2002-02-15 | 2005-01-12 | Matsushita Electric Industrial Co., Ltd. | Hybrid arq retransmission method with reduced buffer size requirement and receiver therefor |
| EP2267931A3 (en) * | 2003-04-10 | 2011-03-02 | Telefonaktiebolaget L M Ericsson (Publ) | Method and device of reordering protocol data units |
| SE0302685D0 (en) * | 2003-10-07 | 2003-10-07 | Ericsson Telefon Ab L M | Method and arrangement in a telecommunication system |
| US8102788B2 (en) * | 2003-11-05 | 2012-01-24 | Interdigital Technology Corporation | Method and wireless transmit/receive unit for supporting an enhanced uplink dedicated channel inter-node-B serving cell change |
-
2005
- 2005-08-29 CN CNB2005100977845A patent/CN100438397C/en not_active Expired - Fee Related
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2006
- 2006-08-11 WO PCT/CN2006/002040 patent/WO2007025454A1/en active Application Filing
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| CN101222485B (en) * | 2007-01-08 | 2012-10-10 | 上海无线通信研究中心 | MAC multiplexing and de-multiplexing method used for medium access control layer |
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| WO2008134926A1 (en) * | 2007-04-30 | 2008-11-13 | Alcatel Shanghai Bell Co., Ltd. | Method and communication system and the sender side device for realizing the inquiry processing on data packets |
| CN101197646B (en) * | 2007-12-28 | 2011-04-27 | 北京天碁科技有限公司 | Data transmission method based on HSUPA |
| CN101631008B (en) * | 2008-07-15 | 2013-02-13 | 电信科学技术研究院 | Method and device for informing load state |
| CN101924618B (en) * | 2009-06-12 | 2014-01-01 | 重庆重邮信科通信技术有限公司 | Implementation method of HARQ in TD-HSUPA |
| CN101924618A (en) * | 2009-06-12 | 2010-12-22 | 重庆重邮信科通信技术有限公司 | Implementation method of HARQ in TD-HSUPA |
| CN102137441A (en) * | 2010-12-22 | 2011-07-27 | 华为技术有限公司 | method, device and system for data transmission |
| CN102137441B (en) * | 2010-12-22 | 2013-08-07 | 华为技术有限公司 | method, device and system for data transmission |
| CN102547687A (en) * | 2010-12-23 | 2012-07-04 | 上海贝尔股份有限公司 | Method and device for processing data packet in wireless communication network |
| CN102547687B (en) * | 2010-12-23 | 2015-06-17 | 上海贝尔股份有限公司 | Method and device for processing data packet in wireless communication network |
| CN110875761A (en) * | 2018-08-31 | 2020-03-10 | 上海诺基亚贝尔股份有限公司 | Method and device for reducing file loss rate through cross-layer scheduling |
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Also Published As
| Publication number | Publication date |
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| CN100438397C (en) | 2008-11-26 |
| WO2007025454A1 (en) | 2007-03-08 |
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