CN101547141B - Method, system and device for data transmission - Google Patents
Method, system and device for data transmission Download PDFInfo
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Abstract
The invention discloses a method, a system and a device for data transmission, belonging to the filed of communication. The method comprises the following steps: a radio network controller RNC enables the data to be transmitted to be preserved to be backup data in a preset buffer memory, and the data is carried with serial numbers; the data to be transmitted is transmitted to the carrier frequency of a base station through a preset channel corresponding to the carrier frequency provided by the base station; each carrier frequency at least corresponds to one channel, and different carrier frequencies correspond to different channels; the transmission state of the data is obtained; the correctly transmitted data preserved in the preset buffer memory in a backing manner is deleted according to the transmission state of the data; the backup data which is not correctly transmitted in the preset buffer memory is obtained, and the channel is selected according to the allocation principle to transmit the backup data which is not correctly transmitted. The system comprises the RNC, the base station and a terminal. By the method provided in the embodiment, the invention can reduce the transmission time delay of the data SDU as possible, ensure the efficiency of data transmission and avoid the unnecessary RLC layer retransmission.
Description
Technical field
The present invention relates to the communications field, particularly a kind of method, system and equipment that sends data.
Background technology
UMTS (Universal Mobile Telecommunications System; UMTS) be to adopt WCDMA (Wideband Code Division Multiple Access; The WCDMA access) third generation communication system of air interface technologies also can be called the WCDMA communication system with the UMTS system, wherein usually; The UMTS system adopts the similar structure framework of mobile system of communicating by letter with the second generation; Comprise RAN (Radio Access Network, Radio Access Network) and CN (Core Network, core network).Referring to Fig. 1, the system configuration sketch map of a kind of UMTS is provided, specifically comprise: UE (User Equipment; The terminal), RAN, CN and external network; Like PSTN (Public Switched Telephone Network, PSTN), Internet; Wherein, UE is used for to the user miscellaneous service function being provided; Use or the like like common speech, data communication, multimedia video, Internet, wireless access network comprises Node B (base station) and RNC (Radio Network Controller, radio network controller); Node B is through the Iub interface and the RNC interconnection of standard, and its major function is data-signal to be carried out processing such as spread spectrum, modulation, chnnel coding; RNC is used for the wireless data resource of the Node B of its control is managed etc.
Those skilled in the art can be known; Need to be distributed to from the data of same service source MAC-hs/ehs (the Medium Access Control high speed/enhace high speed of different carrier frequency in the multi-carrier communications systems; The medium access control is shared at a high speed/is strengthened at a high speed and shares) in the formation, and recombinate and submit according to the order of sequence at receiving terminal.Wherein, RNC is when data distributing is carried out in the MAC-hs/ehs formation; Packet data transmission need be passed through PDCP (Packet Data Convergence Protocol, PDCP) layer and RLC (Radio Link Control, Radio Link control) layer.Wherein, the PDCP layer is used for business datum is handled, and header compression algorithm is provided, and compression improves the utilance of wireless channel from the redundant head of the fractional data of network layer; Rlc layer is used to receive the data from after the processing of PDCP layer, data is carried out processing such as segmentation, and the segmentation and the business of retransmitting of data are provided for the user; Wherein, segmentation is meant divides into groups to be reassembled as the less load cell that is applicable to the transmission of this rlc layer with the grouped data of the PDCP layer transmission of different length, when rlc layer is supported the segmentation of cascade pattern; PDCP issues grouped data, and for rlc layer, this grouping is called RLC SDU (Service Data Unit; Service data unit); This RLC SDU is carried out segmentation, be divided into some PDU (Protocl Data Unit, protocol Data Unit).After rlc layer forms PDU, PDU is sent to the Node B that is positioned at MAC (Medium Access Control, medium access control) layer, the carrier frequency through Node B provides is sent to the UE side with data.Receiving terminal UE receives the packet that sends from Node B scheduling through rlc layer, carries sequence number according to the packet head and sorts, and is committed to the PDCP layer, so through subsequent treatment as decompressing etc., realized the success of data is obtained.Wherein, the rlc layer of transmitting terminal also needs in time whether to send success to PDCP layer announcement data.
In order to satisfy growing wireless traffic needs; Node B supports multi-carrier communication; So-called multi-carrier communication is meant can be simultaneously at two or more carrier frequency transmitting datas; Its up link and down link can use the carrier frequency of identical or different number to communicate simultaneously concerning a terminal; When down link uses two carrier frequency simultaneously,, then only there are a MAC-hs/ehs formation and a scheduler in Node B side if these two carrier frequency are provided by the same disposable plates of Node B; If two carrier frequency are on the different disposable plates of Node B, Node B side can exist two fully independently MAC-hs/ehs formation and schedulers.Need to be distributed to from the data of same service source the enterprising line number of different MAC-hs/ehs formations this moment and pass, and recombinate at the terminal.Because the difference at terminal, and the type of service difference that needs to handle can cause the time delay of two MAC-hs/ehs formations introducings possibly have very big difference.
In the prior art, when RNC when Node B carries out the transmission of data, the PDU that RNC forms after will the SDU segmentation from the PDCP layer; Logic channel through rlc layer transmits, and after Node B receives the packet PDU from rlc layer, it is carried on to dispatch in the carrier frequency that self provides sends to the UE side; When the report that PDU loses is received in the MAC-hs/ehs of Node B formation; Then need retransmit, cause the time delay of obtaining for a complete SDU, for example for SDU this PDU
A, SDU
BAnd SDU
CIf, when scheduling is sent to data, because SDU
BCertain segmentation PDU
XLose (maybe from reasons such as certain carrier frequency quality deteriorations), can cause to get access to complete SDU
BTime delay, cause the data that the UE side gets access to wait for for a long time at its rlc layer, reduced the efficient of transfer of data.
Summary of the invention
In order to reduce the propagation delay time of data SDU as far as possible, guarantee the efficient of transfer of data, the embodiment of the invention provides a kind of method, system and equipment that sends data.Concrete scheme is following:
On the one hand, a kind of method of sending data, this method comprises:
Radio network controller (RNC) backs up preservation with data to be sent in preset buffer memory, above-mentioned data carry sequence number; Each carrier frequency corresponding channel with base station provide preset through rlc layer sends above-mentioned data to be sent, the corresponding at least channel of each carrier frequency, and different carrier frequency is corresponding to different channels; Obtain the transmit status of above-mentioned data; According to the transmit status of above-mentioned data, the data of the deletion correct transmission that backup is preserved in above-mentioned preset buffer memory; According to the transmit status and the channel allocation principle selective channel of data, send the incorrect data of sending that backup is preserved in the above-mentioned preset buffer memory.
On the one hand, a kind of system that sends data, this system comprises: radio network controller (RNC), base station and terminal, wherein,
Above-mentioned radio network controller (RNC) is used for data to be sent are backed up preservation in preset buffer memory; Above-mentioned data carry sequence number; Each carrier frequency corresponding channel with base station provide preset through rlc layer sends above-mentioned data to be sent, the corresponding at least channel of each carrier frequency, and different carrier frequency is corresponding to different channels; Obtain the transmit status of above-mentioned data; According to the transmit status of above-mentioned data, the data of the deletion correct transmission that backup is preserved in above-mentioned preset buffer memory; According to the transmit status and the channel allocation principle selective channel of data, send the incorrect data of sending that back up in the above-mentioned preset buffer memory; Above-mentioned base station is used to receive the data of sending from above-mentioned RNC, and above-mentioned data are sent to above-mentioned terminal through the carrier frequency carrying; Above-mentioned terminal is used to receive the data of sending from above-mentioned base station, and above-mentioned data are handled.
On the one hand, a kind of radio network controller (RNC), this RNC comprises:
Preserve module, be used for data to be sent being saved as Backup Data in preset buffer memory, data carry sequence number to be sent at preset buffer memory; Sending module is used for above-mentioned data to be sent being sent to the carrier frequency of above-mentioned base station through the preset corresponding channel of carrier frequency that provides with the base station of rlc layer; The corresponding at least channel of each carrier frequency, and different carrier frequency is corresponding to different channels; Acquisition module is used to obtain the transmit status of above-mentioned data; First processing module, the transmit status of the above-mentioned data that are used for obtaining, the data of the deletion correct transmission that backup is preserved in above-mentioned preset buffer memory according to above-mentioned acquisition module; Second processing module, the transmit status of the above-mentioned data that are used for obtaining according to above-mentioned acquisition module is sent the correct data of sending that backup is preserved in the above-mentioned preset buffer memory according to the distribution principle selective channel.
The embodiment of the invention is through disposing the different logical channel to different frequencies at the RLC of RNC; Perhaps the interface transmission link between RNC and Node B is disposed at the frequency corresponding transmission channel; Thereby utilize the channel of configuration to transmit data SDU, for occur at receiving terminal can not be complete receive a SDU time situation, can reselect channel and retransmit this SDU; Thereby reduced the propagation delay time of data SDU, guaranteed the efficient of transfer of data.
Description of drawings
Fig. 1 is the system configuration sketch map of the UMTS that provides of prior art;
Fig. 2 is the method flow diagram of the transmission data that provide of the embodiment of the invention 1;
Fig. 3 is the method flow diagram of the transmission data that provide of the embodiment of the invention 2;
Fig. 4 is the method flow diagram of the transmission data that provide of the embodiment of the invention 3;
Fig. 5 is the system schematic of the transmission data that provide of the embodiment of the invention 4;
Fig. 6 is that the embodiment of the invention 5 provides the radio network controller sketch map;
Fig. 7 is the terminal equipment sketch map that the embodiment of the invention 6 provides.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that embodiment of the present invention is done to describe in detail further below.
The method of the transmission data that provide to the embodiment of the invention; Describe with a plurality of embodiment below; Wherein, Embodiment 1 is at the rlc layer setting of the radio network controller (RNC) logic channel corresponding with each frequency, by the PDCP layer buffer memory of preserving Backup Data is set, and is that data are added sequence number by the PDCP layer;
So embodiment 2 is being provided with the buffer memory of preserving Backup Data with the difference of embodiment 1 by rlc layer, and after receiving data by rlc layer, be that data are added sequence number from the PDCP layer;
Embodiment 3 is with the difference of embodiment 1, in the transmission link of radio network controller (RNC) and Node B to each frequency point setting corresponding transmission channel.Specific embodiment is following:
Embodiment 1
Referring to Fig. 2; The embodiment of the invention provides a kind of method of sending data; The logic channel of each the carrier frequency frequency configuration rlc layer through the convey data packets that provides according to Node B at rlc layer; Thereby realize the successful transmission of data, reduce the propagation delay time of data SDU effectively, guarantee the efficient of transfer of data.Particular content is following:
Wherein, when being each carrier frequency configuration logic channel DTCH, specifically can be configured according to the transmission needs of system, need to guarantee the logic channel of the corresponding at least configuration of each carrier frequency, different carrier frequency is corresponding to the different logical channel; Can also configure corresponding control channel DCCH (Dedicated Control Channel, DCCH) for the logic channel of configuration accordingly, be used for logic channel is controlled.Wherein, each logic channel send window and various transmission parameter such as data of having oneself are replied the stand-by period etc.For example, 2 carrier frequency f0 and f1 that present embodiment provides with Node B are that example describes, and are its configuration logic channel X to carrier frequency f0; For carrier frequency f1 is its configuration logic channel Y.
For example, PDCP course rlc layer has issued 4 SDU, after numbering, is respectively SDU1, SDU2, SDU3 and SDU4, and in the buffer memory of PDCP layer, preserves backup.
For example, if having two carrier frequency frequency f0 and f1, correspondingly set up two corresponding logic channels, be respectively X and Y, rlc layer can be distributed to logic channel X with SDU1, SDU3 and transmit when carrying out the distribution of packet at this moment; SDU2, SDU4 are distributed to logic channel Y to be transmitted.
After step 104, the logic channel of the rlc layer of RNC are handled the SDU that receives, send in the MAC-hs/ehs scheduling queue of each self-corresponding NodeB and dispatch, send to terminal UE.
Wherein, The logic channel of rlc layer is being handled the SDU that receives, and for example, SDU is segmented into PDU of suitable protocol transmission or the like; And can be in the time of segmentation through adding sign to PDU; Indicate stem, middle part and the afterbody of this SDU, thereby realize through checking corresponding sign, judge whether the PDU that receives can form complete SDU.For example, to SDU1, rlc layer is segmented into PDU with this SDU
A, PDU
B, PDU
C, send; Wherein, PDU
AIndicated and be header data unit, the PDU of this SDU
BIndicated and be data of middle part unit, the PDU of this SDU
CIndicated for the tail data unit of this SDU, with PDU
A, PDU
B, PDU
CBe sent to the corresponding MAC-hs/ehs of frequency f0 of NodeB through logic channel X; In like manner, to SDU2, will be sent to the corresponding MAC-hs/ehs of frequency f1 of Node B through logic channel Y to each data cell after this SDU4 segmentation.
Correspondingly, terminal UE also can dispose corresponding MAC-hs/ehs and receive formation and logic channel, when terminal UE receives PDU through a logic channel, whether can form a complete SDU through checking corresponding sign, judge the PDU that receives.Present embodiment is judged with terminal UE can't form the trigger condition of a complete SDU as status report.For example, when terminal UE is successfully received SDU1 through logic channel X, then send ACK to the RLC of RNC and confirm to receive, promptly this SDU1 sends response of successful; Successfully receive SDU3 through logic channel X, then send ACK and confirm to receive to the RLC of RNC; When successfully not receiving complete SDU2 through logic channel Y, then send NACK and confirm not receive to the RLC of RNC, promptly SDU2 sends the response of failure.
For example, rlc layer has received SDU1 and has sent successful ACK, notice PDCP layer, this SDU1 that preserves in the buffer memory of deletion PDCP.
In this step, according to allocation algorithm to the SDU of this re-transmission when logic channel issues, possibly be assigned in the corresponding logic channel of the transmission frequency that just passes this SDU, also possibly be distributed to the logic channel of other frequency.For example, received SDU2 and sent not successful NACK, the PDCP layer issues the SDU2 that in buffer memory, prestores to rlc layer again; After RLC receives the SDU2 that is resend by the PDCP layer,, this SDU is carried out the distribution of logic channel, may this SDU2 be issued among the initial logic channel Y, also maybe this SDU2 be issued among the logic channel X according to allocation algorithm.
Be illustrated in the face of the allocation algorithm that relates in this step down:
For example, can the definition of data bag should receive correct transmission when the buffer memory of RLC and reply the timer time of ACK, and the threshold value of receiving incorrect transmission response times.When the first time, RLC received that certain SDU does not correctly send indication; After getting access to the SDU of backup to the PDCP layer; Carry out again when logic channel issues, can not changing the logic channel of initial use, still use logic channel corresponding when just passing; When receiving for the second time the indication that does not have correct transmission, just change logic channel and send; Perhaps at preset transmission timer to after date, still do not obtain any replying, just change logic channel and send, the embodiment of the invention does not limit the concrete allocation algorithm that is adopted.
For example, after terminal UE is received each PDU through logic channel, through sign judge receive complete SDU after; Because uncertainty in the transmission such as channel quality etc.; Cause the terminal UE possibly can't receive complete SDU by order as expected, suppose that terminal UE receives that the sequencing of the SDU that each is complete is SDU1, SDU3, SDU2, SDU4, after the reception it is kept in the buffer memory from RNC; Obtain the sequence number sign through the head that reads the PDCP layer; Submit according to the order of sequence to the PDCP layer by the sequence number order then, as, SDU1, SDU2, SDU3 and SDU4 submitted successively to.
Further; Terminal UE is in order to overcome when occurring that certain SDU is not receiving for a long time or when forming the situation of complete SDU and after causing the situation of reported data in time, UE to set self waiting for the long enough time or set the SDU number of preserving in the unified buffer memory and submit to the SDU of PDCP layer with complete reception abundant the time.Abundant and the stand-by period use relevant parameters definition of buffer memory number, definition can be the RNC definition, when logic channel is set up, perhaps UE oneself definition.
The method that the embodiment of the invention provides; Through at rlc layer logic of propositions channel; Guaranteed that the data that belong to same SDU send in same frequency formation; The rlc layer of receiving terminal UE side reduces the propagation delay time of data SDU through the achieve a butt joint ordering of the SDU that receives of the sequence number sign that reads the PDCP layer and distribute, and guarantees the efficient of transfer of data.The technique scheme that present embodiment provides need not revised the form of existing SDU and PDU, has farthest reduced the influence to existing protocol, can also reduce the bigger logic channel transmitting data of retransmission delay time through the switching of logic channel.
Embodiment 2
Referring to Fig. 3; The embodiment of the invention provides a kind of method of transfer of data, different being of method that provides with embodiment 1, at transmitting terminal RNC when issuing the SDU packet by PDCP course rlc layer; The PDCP layer is not this SDU Allotment Serial Number that issues sign; But by rlc layer after receiving the SDU packet, be SDU Allotment Serial Number SN, the row cache of going forward side by side; Wherein, this method thes contents are as follows:
For example, the rlc layer of RNC is received 4 SDU from the PDCP of RNC successively, correspondingly, and for its Allotment Serial Number sign, like SDU1, SDU2, SDU3 and SDU4.
For example; Rlc layer is numbered according to the sequencing that receives through the SDU from the PDCP layer that will receive, like SDU1, SDU2, SDU3 and SDU4, according to the rule that issues; SDU1, SDU3 are issued among the logic channel X, SDU2, SDU4 are issued among the logic channel Y.Wherein, the carrier frequency frequency f0 that the corresponding Node B of logic channel X provides, the carrier frequency frequency f1 that the corresponding Node B of logic channel Y provides.
After step 205, the logic channel of rlc layer are handled the SDU that receives, send to dispatch in the MAC-hs/ehs scheduling queue of each self-corresponding Node B and send to terminal UE.
Further; Terminal UE for overcome when occur that certain SDU is not receiving for a long time or when forming the situation of complete SDU and cause the situation of reported data in time, UE can set from as after waiting for the long enough time or the SDU number of preserving in the unified buffer memory submit to the SDU of PDCP layer abundant the time complete reception.Abundant and the stand-by period use relevant parameters definition of buffer memory number, definition can be the RNC definition, when logic channel is set up.Perhaps UE oneself definition.
The method that the embodiment of the invention provides, through at rlc layer logic of propositions channel, the data that guaranteed to belong to same SDU are to send in same frequency formation; The sequence number of the SDU that the rlc layer extraction of receiving terminal UE side receives is submitted to the PDCP layer after each SDU is sorted again, reduces the propagation delay time of data SDU; Guarantee the efficient of transfer of data; Avoid unnecessary rlc layer to retransmit, need not revise the form of existing SDU and PDU, farthest reduced influence existing protocol; Can also reduce the PDU that transmits on the bigger logic channel of retransmission delay time through the switching of logic channel.
Embodiment 3
Referring to Fig. 4; The embodiment of the invention provides a kind of method of sending data, is that with the difference of the foregoing description 1 and embodiment 2 present embodiment is through on the Iub interface of RNC and NodeB; To each carrier frequency distribution transmission channel independently; Thereby realize guaranteeing to transmit in the corresponding MAC-hs/ehs formation of a carrier frequency for the first biography of a SDU, wherein, this method thes contents are as follows:
Step 301 according to preset rules, is divided the transmission link of RNC and Node B.
Wherein, there is transmission link between RNC and the Node B,, guarantees that a carrier frequency correspondence that provides corresponding to Node B has a transmission channel at least through the transmission link of RNC and Node B is divided.
Step 302, RNC PDCP course rlc layer issue the SDU bag, and in the preset buffer memory of PDCP, preserve the SDU that issues, and back up, and carry the sequence number sign of being distributed by the PDCP layer among each SDU.
For example, rlc layer receives 4 SDU from the PDCP layer, is respectively SDU1, SDU2, SDU3 and SDU4.
Step 303 obtains the SDU after the segmentation after RLC handles the packet SDU that receives, through the selection to transmission channel, guarantee to belong to the same MAC-hs/ehs formation that a plurality of segmentations of same SDU get into Node B.
Wherein, for example, RLC carries out segment processing to the SDU1 that receives, and obtains the SDU1 after the segmentation
XAnd SDU1
Y, the SDU2 that receives is carried out segment processing, obtain SDU2
XAnd SDU2
YIf this moment, correspondence was distributed two transmission channel A and B, and transmission channel A is corresponding to carrier frequency f0, transmission channel B is corresponding to carrier frequency f1, and through selecting transmission channel, RLC is with SDU1
XAnd SDU1
YSend to Node B through transmission channel A, with SDU2
XAnd SDU2
YSend to Node B through transmission channel B, thereby guaranteed to belong to the same carrier frequency MAC-hs/ehs formation that a plurality of segmentations of same SDU get into Node B.
Step 304, the MAC-hs/ehs scheduling queue of Node B is dispatched the data that receive and is sent to terminal UE.
At this moment, terminal UE can be to the rlc layer return state report push-notification-answer of RNC according to the SDU that receives.
Step 305, the rlc layer receiving state report response of RNC according to the indication of carrying in this push-notification-answer, judges whether SDU successfully sends; If, execution in step 306; Otherwise, execution in step 307.
Step 306, rlc layer sends the correct notice of sending of SDU to the PDCP layer, and the PDCP layer is received the notice of the correct transmission that rlc layer sends, and deletion is from the SDU as backup that prestores as this SDU.
Step 307; Rlc layer sends the notice that SDU does not correctly send to the PDCP layer; The PDCP layer is received the incorrect notice of sending that rlc layer sends, and the PDCP layer issues this SDU of preparatory preservation again to rlc layer, after RLC receives the SDU that is resend by the PDCP layer; According to allocation algorithm, this SDU is carried out reselecting of transmission channel.
Further, can also work as terminal UE and send the notice that lacks certain PDU, if this moment, rlc layer has been preserved this PDU, then can only resend this PDU.
Step 308 after terminal UE receives complete SDU, is directly delivered to the PDCP layer, and PDCP carries out buffer memory, is sorted according to the sequence number sign by the PDCP layer then, and then handles accordingly, like operations such as decompressions.
In addition; Similar with present embodiment; Through on the Iub interface of RNC and NodeB, distributing the independent transmission channel corresponding with carrier frequency, carry out the method for transfer of data, can also adopt following mode to realize: after the rlc layer of radio network controller (RNC) receives the data from the PDCP layer; These data to be sent are backed up preservation in the preset buffer memory of rlc layer, and be that data are added sequence number by the PLC layer; Send data in the MAC-hs/ehs scheduling queue of base station through the preset corresponding interface transmission channel of each carrier frequency then with the base station provides; Wherein, The MAC-hs/ehs scheduling queue of base station sends to terminal UE with the data that get access to, and the rlc layer of RNC in time obtains the transmit status of data; Rlc layer is according to the transmit status of data then, when to send out a shape state be correct, and the data of the correct transmission that the backup in the deletion RLC preset buffer memory is preserved; When transmit status is correct for not sending, select transmission channel according to the transmission channel distribution principle, send the incorrect data of sending that backup is preserved in the rlc layer preset buffer memory.
Correspondingly, after terminal UE is received complete SDU, can also sort by the sequence number order then, remove the sequence number sign of rlc layer after the ordering, carry out preface to the PDCP layer again and submit through reading the sequence number sign of rlc layer for its distribution.
The method that the embodiment of the invention provides, through preset transmission channel, the data that guaranteed to belong to same SDU are to send in same frequency formation; The RLC of receiving terminal UE side is sorted according to the sequence number that SDU carries by PDCP after receiving that complete SDU submits to, has reduced the propagation delay time of data SDU; Guarantee the efficient of transfer of data; Avoid unnecessary rlc layer to retransmit, need not revise the form of existing SDU and PDU, farthest reduced influence existing protocol; Can also reduce the data of transmitting on the bigger transmission channel of retransmission delay time through the switching of transmission channel.
Embodiment 4
Referring to Fig. 5, the embodiment of the invention provides a kind of system that sends data, and system comprises: radio network controller (RNC), and base station and terminal, wherein,
RNC saves as Backup Data with data to be sent in preset buffer memory, this preset buffer memory is positioned at the PDCP PDCP layer of RNC, or is positioned at the Radio Link control rlc layer of RNC; RNC is through the preset corresponding channel of each carrier frequency that provides with the base station; Wherein, The corresponding at least channel of each carrier frequency, and different carrier frequency is corresponding to different channels, and this channel can be specially the logic channel that is positioned at rlc layer; The corresponding at least logic channel of carrier frequency, and different carrier frequency is corresponding to the different logical channel; Perhaps this channel is specially the interface transmission channel between RNC and the base station, the corresponding at least transmission channel of carrier frequency, and different carrier frequency is corresponding to different transmission channels.RNC sends to data to be sent the carrier frequency of base station; RNC also will get access to the status report of the data of transmission timely, as sends successful ACK, or sends not successful NACK response.According to the transmission report of the data of obtaining, when data are sent successfully, delete the data of the correct transmission that backup is preserved in preset buffer memory, discharge cache resources; When data are not sent success; RNC obtains the successful Backup Data of not transmission that backup is preserved in the preset buffer memory, sends according to the distribution principle selective channel, wherein; This distribution principle can not surpass preset thresholding for send correct indication number of times when the data that receive; Select another channel to carry out the repeating transmission of data, or in Preset Time, do not receive the indication of replying of data transmission, then select another channel to carry out the repeating transmission of data.Before data were sent, the PDCP layer of RNC or rlc layer also added sequence number for data.
The base station receives the data of sending from RNC, and data are sent to the terminal through carrier frequency.
The terminal receives the data of sending from the base station, and data are handled.This terminal specifically comprises: receiver module, order module and processing module, wherein
Receiver module receives and carries the packet of sequence number, and order module sorts according to the sequence number that packet carries, and this order module can be positioned at the rlc layer of terminal equipment or the PDCP layer of terminal equipment, the packet after the ordering of processing module handling ordered module.
The system that the embodiment of the invention provides, through logic of propositions channel or transmission channel, the data that guaranteed to belong to same SDU must be to send in same frequency formation; Guarantee the efficient of transfer of data; Avoid unnecessary rlc layer to retransmit, do not need the form of existing SDU and PDU is made amendment, farthest reduced influence existing protocol; Can also pass through switching channels, reduce the data of the bigger channel of retransmission delay time.
Embodiment 5
Referring to Fig. 6, the embodiment of the invention provides a kind of radio network controller (RNC), wherein,
RNC will save as Backup Data with data to be sent through preserving module in preset buffer memory, this preset buffer memory is positioned at the PDCP layer of RNC, or is positioned at the rlc layer of RNC; RNC is through the preset corresponding channel of carrier frequency that provides with the base station; Wherein, The corresponding at least channel of each carrier frequency, and different carrier frequency is corresponding to different channels, and this channel can be specially the logic channel that is positioned at rlc layer; The corresponding at least logic channel of carrier frequency, and different carrier frequency is corresponding to the different logical channel; Perhaps this channel is specially the interface transmission channel between RNC and the base station, the corresponding at least transmission channel of carrier frequency, and different carrier frequency is corresponding to different transmission channels.RNC sends to data to be sent through sending module the carrier frequency of base station; RNC also will get access to the status report of the data of transmission through acquisition module timely, as sends successful ACK, or sends not successful NACK response.According to the transmission of the data of obtaining report, when data are sent successfully, the data of the first processing module deletion correct transmission of backup preservation in preset buffer memory among the RNC, release cache resources; When data are not sent success; Among the RNC the and processing module obtain that backup is preserved in the preset buffer memory does not send successful Backup Data; Send according to the distribution principle selective channel; Wherein, distribution principle can not surpass preset thresholding for send correct indication number of times when the data that receive, and selects another channel to carry out the repeating transmission of data; Or in Preset Time, do not receive the indication of replying that data send, then select another channel to carry out the repeating transmission of data.And before data were sent, the PDCP layer of RNC or rlc layer also added sequence number for data.
The RNC that the embodiment of the invention provides; Through logic of propositions channel or transmission channel; The data that guaranteed to belong to same SDU must be to send in same frequency formation; Guarantee the efficient of transfer of data, avoid unnecessary rlc layer to retransmit, farthest reduced influence existing protocol.
Embodiment 6
Referring to Fig. 7, the embodiment of the invention provides a kind of terminal equipment, and terminal equipment comprises: receiver module, order module and processing module.Wherein, receiver module receives packet, and packet carries sequence number; Order module sorts according to the sequence number that packet carries; Packet after the ordering of processing module handling ordered module.
Wherein, order module is positioned at the rlc layer of terminal equipment, perhaps, is positioned at the PDCP layer of terminal equipment.
The terminal equipment that the embodiment of the invention provides can be a rlc layer to the position of a plurality of data packet sequencings of receiving, and realizing sort earlier afterwards is committed to the mode of PDCP layer, can realize that also directly elder generation submits to after being received by RLC at the PDCP layer.
To sum up; The technical scheme that the embodiment of the invention provides is through logic of propositions channel or transmission channel, and the data that guaranteed to belong to same SDU must be to send in same frequency formation, guarantee the efficient of transfer of data; Avoid unnecessary rlc layer to retransmit; Farthest reduced influence, can also reduce the data volume in that bigger branch of re-transmission amount time delay that rlc layer retransmits as far as possible, when the time delay of on two carrier frequency, transmit introducing when data differs greatly existing protocol; For example the signal on certain carrier frequency worsens suddenly; Cause data to be sent out and do not go out, can this part data be changed a frequency and send, avoid data to wait for and up to submit for a long time at the rlc layer of UE side.
Part steps in the embodiment of the invention can utilize software to realize that corresponding software programs can be stored in the storage medium that can read, like CD or hard disk etc.
The above is merely specific embodiment of the present invention;,, not all under the prerequisite that does not break away from the principle of the invention for those skilled in the art in order to restriction the present invention; Any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. a method of sending data is characterized in that, said method comprises:
Radio network controller (RNC) backs up preservation with data to be sent in preset buffer memory, said data carry sequence number;
Each carrier frequency corresponding channel with base station provide preset through rlc layer sends said data to be sent, the corresponding at least channel of each carrier frequency, and different carrier frequency is corresponding to different channels;
Obtain the transmit status of said data;
According to the transmit status of said data, the data of the deletion correct transmission that backup is preserved in said preset buffer memory; According to the transmit status and the channel allocation principle selective channel of data, send the incorrect data of sending that backup is preserved in the said preset buffer memory.
2. send the method for data according to claim 1, it is characterized in that, said method further comprises:
In the preset buffer memory of the PDCP PDCP of radio network controller (RNC) layer, back up preservation;
The Radio Link control rlc layer of said RNC sends said data through the preset corresponding logic channel of each carrier frequency with the base station provides;
The rlc layer of said RNC obtains the transmit status of said data;
The rlc layer of said RNC is notified the data of the said PDCP layer deletion correct transmission that backup is preserved in said preset buffer memory according to the transmit status of said data; Obtain the incorrect data of sending that backup is preserved in the said PDCP layer preset buffer memory, select logic channel, send said incorrect data of sending according to the logical channel assignment principle.
3. send the method for data according to claim 1, it is characterized in that, said method further comprises:
The rlc layer of radio network controller (RNC) backs up preservation with said data to be sent in the preset buffer memory of said rlc layer, send said data through the preset corresponding logic channel of each carrier frequency with the base station provides;
Said rlc layer obtains the transmit status of said data;
Said rlc layer is deleted the data of the correct transmission of the backup preservation in the said RLC preset buffer memory according to the transmit status of said data; Transmit status and logical channel assignment principle according to data are selected logic channel, send the incorrect data of sending that backup is preserved in the said RLC preset buffer memory.
4. the method for transmission data as claimed in claim 1 is characterized in that, said method further comprises:
In the preset buffer memory of the PDCP PDCP of radio network controller (RNC) layer, back up preservation;
The Radio Link of said RNC control rlc layer sends said data through preset each carrier frequency corresponding transmission channel that provides with the base station;
Said rlc layer obtains the transmit status of said data;
Said rlc layer is notified the data of the said PDCP layer deletion correct transmission that backup is preserved in said preset buffer memory according to the transmit status of said data; Obtain the incorrect data of sending that backup is preserved in the said PDCP layer preset buffer memory, select transmission channel, send said incorrect data of sending according to the transmission channel distribution principle.
5. the method for transmission data as claimed in claim 1 is characterized in that, said method further comprises:
The rlc layer of radio network controller (RNC) backs up preservation with said data to be sent in the preset buffer memory of said rlc layer, send said data through preset each carrier frequency corresponding transmission channel that provides with the base station;
Said rlc layer obtains the transmit status of said data;
Said rlc layer is deleted the data of the correct transmission of the backup preservation in the said RLC preset buffer memory according to the transmit status of said data; Transmit status and transmission channel distribution principle according to data are selected transmission channel, send the incorrect data of sending that backup is preserved in the said rlc layer preset buffer memory.
6. send the method for data according to claim 1, it is characterized in that, saidly send, be specially according to the distribution principle selective channel:
Do not send correct indication number of times when the said data that receive and surpass preset thresholding, select another channel to carry out the repeating transmission of data; Or
In Preset Time, do not receive the indication of replying of said data transmission, then select another channel to carry out the repeating transmission of data.
7. send the method for data according to claim 1, it is characterized in that, said method also comprises:
A plurality of data are received through the preset channel of rlc layer in the terminal, are submitted to the PDCP layer at said terminal after the sequence number ordering according to data carry; Or,
The terminal will receive a plurality of data through the preset channel of rlc layer, be submitted to the PDCP layer at said terminal, sorted by the sequence number of said PDCP layer according to said data carry.
8. a system that sends data is characterized in that, said system comprises: radio network controller (RNC), and base station and terminal, wherein,
Said radio network controller (RNC) is used for data to be sent are backed up preservation in preset buffer memory; Said data carry sequence number; Each carrier frequency corresponding channel with base station provide preset through rlc layer sends said data to be sent, the corresponding at least channel of each carrier frequency, and different carrier frequency is corresponding to different channels; Obtain the transmit status of said data; According to the transmit status of said data, the data of the deletion correct transmission that backup is preserved in said preset buffer memory; According to the transmit status and the channel allocation principle selective channel of data, send the incorrect data of sending that backup is preserved in the said preset buffer memory;
Said base station is used to receive the data of sending from said RNC, and said data are sent to said terminal through the carrier frequency carrying;
Said terminal is used to receive the data of sending from said base station, and said data are handled.
9. like the system of the said transmission data of claim 8, it is characterized in that said channel is specially the logic channel that is positioned at Radio Link control rlc layer; The corresponding at least logic channel of said carrier frequency, and different carrier frequency is corresponding to the different logical channel; Or,
Said channel is specially the interface transmission channel between said RNC and the said base station; The corresponding at least transmission channel of said carrier frequency, and different carrier frequency is corresponding to different transmission channels.
10. like the system of the said transmission data of claim 8, it is characterized in that said preset buffer memory is positioned at the PDCP RDCP layer of said RNC or the Radio Link control rlc layer of said RNC.
11. the system like the said transmission data of claim 8 is characterized in that,
Said sequence number is that said data are added by the PDCP layer of said RNC or the rlc layer of said RNC.
12. the system like the said transmission data of claim 8 is characterized in that, said terminal specifically comprises:
Receiver module is used to receive data, said data carry sequence number;
Order module is used for sorting according to the sequence number of said data carry;
Processing module is used to handle the data after said order module sorts.
13. the system like the said transmission data of claim 12 is characterized in that, said order module is positioned at the rlc layer at said terminal or the PDCP layer at said terminal.
14. a radio network controller (RNC) is characterized in that, said RNC comprises:
Preserve module, be used for data to be sent being saved as Backup Data in preset buffer memory at preset buffer memory; Said data carry sequence number to be sent;
Sending module is used for said data to be sent being sent to the carrier frequency of said base station through the preset corresponding channel of carrier frequency that provides with the base station of rlc layer; The corresponding at least channel of each carrier frequency, and different carrier frequency is corresponding to different channels;
Acquisition module is used to obtain the transmit status of said data;
First processing module, the transmit status of the said data that are used for obtaining, the data of the deletion correct transmission that backup is preserved in said preset buffer memory according to said acquisition module;
Second processing module, the transmit status of the said data that are used for obtaining according to said acquisition module is sent the correct data of sending that backup is preserved in the said preset buffer memory according to the distribution principle selective channel.
15., it is characterized in that said preset buffer memory is positioned at the PDCP PDCP layer of said RNC or the Radio Link control rlc layer of said RNC like the said radio network controller (RNC) of claim 14.
16. radio network controller (RNC) as claimed in claim 14 is characterized in that, said channel is specially the logic channel that is positioned at rlc layer; The corresponding at least logic channel of said carrier frequency, and different carrier frequency is corresponding to the different logical channel; Or,
Said channel is specially the interface transmission channel between said RNC and the said base station; The corresponding at least transmission channel of said carrier frequency, and different carrier frequency is corresponding to different transmission channels.
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| CN2008101027294A CN101547141B (en) | 2008-03-25 | 2008-03-25 | Method, system and device for data transmission |
| PCT/CN2009/071010 WO2009117961A1 (en) | 2008-03-25 | 2009-03-25 | Method, system and device for transmitting data |
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| CN2008101027294A CN101547141B (en) | 2008-03-25 | 2008-03-25 | Method, system and device for data transmission |
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| CN103428246B (en) * | 2012-05-21 | 2018-01-19 | 中兴通讯股份有限公司 | The method and terminal that packet data convergence protocol is retransmitted to up IP bags |
| CN104349387B (en) * | 2013-08-08 | 2018-08-14 | 上海诺基亚贝尔股份有限公司 | The method and apparatus that downlink transmission is used in the system for supporting double/multi-connection |
| CN104837163B (en) * | 2014-02-08 | 2019-10-25 | 夏普株式会社 | Method and base station for deleting radio link control service data unit |
| CN104243111B (en) * | 2014-09-01 | 2017-12-26 | 广州华多网络科技有限公司 | A kind of method and apparatus of packet transmission |
| CN106656573A (en) * | 2016-11-23 | 2017-05-10 | 河池学院 | Information transmission robot system based on topological structure |
| CN108282272A (en) * | 2017-01-05 | 2018-07-13 | 中兴通讯股份有限公司 | A kind of method and device that rlc layer accurately retransmits |
| US11558494B2 (en) | 2017-06-19 | 2023-01-17 | Beijing Xiaomi Mobile Software Co., Ltd. | Method and apparatus for processing data, user equipment and computer-readable storage medium |
| CN109428684B (en) * | 2017-08-30 | 2020-11-27 | 中国移动通信有限公司研究院 | Data transmission method, RLC entity and PDCP entity |
| CN110167146B (en) * | 2018-02-12 | 2023-06-09 | 维沃移动通信有限公司 | SDU processing method and communication equipment |
| CN111935794B (en) * | 2020-07-02 | 2021-06-04 | 四川创智联恒科技有限公司 | Data processing method for shortening switching time delay |
| CN114666830A (en) * | 2020-12-03 | 2022-06-24 | 大唐移动通信设备有限公司 | Method and device for transmitting data of millimeter wave base station RLC layer |
| CN112702752A (en) * | 2020-12-22 | 2021-04-23 | 展讯通信（上海）有限公司 | Communication method, device and equipment |
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