CN1921346A - Data segmentation cascade transmitting method - Google Patents
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- CN1921346A CN1921346A CN 200510036820 CN200510036820A CN1921346A CN 1921346 A CN1921346 A CN 1921346A CN 200510036820 CN200510036820 CN 200510036820 CN 200510036820 A CN200510036820 A CN 200510036820A CN 1921346 A CN1921346 A CN 1921346A
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Abstract
The invention relates to a data dividing cascade transmission method, used in medium access control layer of wireless communication network to transmit data. Wherein, said method comprises: dividing the received service data unit SDU via service quality QoS into several QoS service data flows; cascading the SDU to relative appointed protocol data unit PDU of medium access control layer to be transmitted. The invention can apply the network system with low delay and low complexity, and combine the full-IP network to obtain the character of data QoS, to cascade and transmit divided data of MAC layer.
Description
Technical field
The present invention relates to the wave point data transferring method in the mobile communication, in particular, the present invention relates to the data segmentation cascade transmitting method in a kind of radio communication evolvement network.
Background technology
Universal mobile telecommunications system (UMTS, Universal Mobile Telecommunication Systems) is to adopt the 3-G (Generation Three mobile communication system) of WCDMA air interface.Usually also the UMTS system is called the WCDMA communication system.Its system configuration as shown in Figure 1, on function, network element can be divided into Radio Access Network (RAN, Radio Access Network) and core net (CN, Core Network).Wherein Radio Access Network is used to handle all and wireless function associated, and all voice calls in the UMTS system are connected with data and the exchange and the route of external network and CN handles.
With reference to shown in Figure 2, the network element of UMTS system comprise subscriber equipment (UE, UserEquipment), UMTS Terrestrial radio access network (UTRAN, UMTS Terrestrial Radio AccessNetwork), CN, OMC functional entity.
Fig. 2 has illustrated the main interface of WCDMA system simultaneously.The Uu interface is the wave point of WCDMA.UE is linked into the fixed network part of UMTS system by the Uu interface, but the Iu interface is the interface that connects UTRAN and CN.The Iur interface is the interface that connects between the RNC, and the Iur interface is the distinctive interface of UMTS system, is used to the mobile management to travelling carriage among the RAN.Iub interface is the interface that connects NodeB and RNC.
Wave point refers generally to the Uu interface between subscriber equipment and the network.The protocol architecture of wave point is as shown in Figure 3:
Wave point is divided into three protocol layers:
Physical (L1);
Data link layer (L2);
Network layer (L3)
Its middle level two comprises four sublayers such as medium access control (MAC, Media Access Control), RLC, PDCP, BMC.
The function of media access control sublayer comprises: the mapping between logic channel and the transmission channel; For each transmission channel is selected suitable transformat; Processed between the UE data flow; Adopt the processed of dynamically pre-arrangement method between the UE; Processed between the data flow of the last several users of DSCH and FACH; The sign of UE on the Common transport channel; High-rise PDU multiple connection for sending the transmission block of physical layer to by transmission channel, and will be connect that to separate multiple connection be high-rise PDU by transmission channel from the transmission block of physical layer; Traffic supervision; The dynamic transmission channel type switches; Transparent RLC encrypts; The access service rank is selected.
RLC sublayer function: cut apart and the transmission of reorganization, series connection, filling, user data, error detection, send that high-rise PDU, duplicate detection, Flow Control, non-authentication data transfer mode sequence number check according to the order of sequence, protocol error detection and recovery, encryption, hang-up and restore funcitons.
PDCP sublayer function: in transmission and receiving entity, carry out the header suppression and the decompression of IP traffic respectively; The combination of header compression method correspondence and particular network layer, transport layer or upper-layer protocol; Transmitting user data; The PDCP-SDU that Non-Access Stratum is sent here is forwarded to rlc layer; A plurality of different RB are multiplexed into same RLC entity.
BMC sublayer function: the storage of cell broadcast messages, business amount monitor and for the scheduling of CBS request Radio Resource, BMC message, send BMC message, transmit cell broadcast messages to high-rise (NAS) to UE.
In existing 3G R6 system, the division cascade function mainly realizes in layer 2RLC sublayer, and media access control sublayer only inserts the simple PDU Cascading Methods of (HSDPA) and high speed uplink bag access (HSUPA) at the high-speed downstream bag.
The division cascade function of RLC entity mainly is:
All there is independently RLC entity foundation to handle at each business, the RLC entity has three kinds of patterns: the AM pattern is mainly used to support ARQ to retransmit and is generally used for dedicated logical channel, the TM pattern is mainly used to the transparent transmission of support voice, and the UM pattern is mainly used to support the every other transmission that does not need retransmission process.The division cascade function is different at three kinds of different modes, and the TM pattern has only dividing function not have cascade function, and is that optionally UM and AM have comparatively complete division cascade function, but mechanism is different.Owing in evolvement network, adopted the all-IP notion, all data all are to adopt the form of packet to transmit, and relevant with the present invention here mainly is the division cascade mechanism of UM and AM, following mask body introduction.
For AM, if division cascade mechanism mainly is if the SDU that gets off from high level does not meet predetermined PDU size, will carry out division cascade, add PAD simultaneously and guarantee PDU size (perhaps being used under the special situation of some LI), Length Indication (LI) is used to refer to SDU end position among each PDU, SN is used for being numbered to the good PDU of division cascade, makes the receiving terminal SDU that can correctly recombinate out.The big or small relative fixed of each PDU by the RRC indication, and can be passed through RLC volume reconstruction Rob Roy reprovision system.
For UM, division cascade reason, condition and method are all similar with AM, and different is the size issue of PDU, for UM, each TTI, MAC can be according to the requirement of physical layer to RLC claim size and the number of the PDU that indicates needs, and RLC comes division cascade according to this indication.On the other hand, the sequence number of AM and UM (SN) scope is distinguishing, and the serial number range of AM is 15bits, and the serial number range of UM is 7bits.
After introducing HSDPA and HSUPA technology among the MAC, to share be that a certain moment Internet resources are all farthest distributed to some users because the principle of these two kinds of technology is timesharing, and they all contain and mix repeat requests mechanism (HARQ).Have only a PDU by HS-DSCH or E-DCH transmission for each Transmission Time Interval (TTI, Transmission TimeInterval), therefore the PDU by these two Channel Transmission should be bigger.Realize high-speed transfer in order to make full use of Internet resources, be responsible for the MAC-hs of HSDPA and HSUPA and the MAC-e/es entity is combined into suitable transmission after the MAC-d PDU cascade that transmitting terminal will come from MAC-d (being responsible for handling the MAC entity of dedicated logical channel data) transmission size.During as receiving terminal, also earlier MAC-hs, MAC-e/es PDU are reassembled into MAC-dPDU.
Above-mentioned this simple cascade method is different from the cascade of RLC, and it can not upset original PDU and puts into a MAC-hs PDU, and simply links up, but the RLC cascade often is accompanied by and cuts apart.
There is following shortcoming in above-mentioned existing partition cascade method:
Along with the introducing of enhancement techniques such as HSDPA, Enhanced Uplink, the 3GPP wireless access technology is that very high competitiveness is arranged in a few years from now on.Yet in order to guarantee the competitiveness of more longer time (as 10 years or longer), the Long Term Evolution of 3GPP wireless access technology need be considered.In 3GPP TSGRAN#26 meeting, having passed through research project " Evolved UTRA and UTRAN " is LTE (LongTerm Evolution) evolvement network.For the demand of the various performances of network that satisfy this Long Term Evolution, corresponding improvement all can take place in network configuration, wave point, protocol stack function.Existing protocol layer structure causes the function of a lot of repetitions, such as the re-transmission of RLC and media access control sublayer, division cascade or the like.In order to reduce to postpone and simplify agreement, the function of these repetitions must be considered to simplify, and promptly existing partition cascade method is applicable to 3G R6 system, but for new system, needs satisfy simplified structure and the demand that reduces to postpone under and improper.
Summary of the invention
The technical problem that the present invention solves provides a kind of data segmentation cascade transmitting method, with the low time delay that adapts to new network system, the requirement of low-complexity, and need understand the characteristic of each data QoS in conjunction with the complete IP network media access control sublayer, realize that MAC layer data division cascade transmits.
For addressing the above problem, a kind of data segmentation cascade transmitting method of the present invention is used for the medium access control layer transmission data of radio communication evolvement network, and described method comprises:
A, the Service Data Unit SDU that receives is categorized as various QoS business data flows according to service quality QoS;
B, the Service Data Unit SDU division cascade of all kinds of QoS business data flows protocol Data Unit PDU to the medium access control layer transmission of such appointment is transmitted.
Wherein, the division cascade entity that step b is dynamically set up during data by transmission carries out division cascade to the Service Data Unit SDU of described all kinds of QoS business data flows, the utilization of different QoS business data flow separately independently the division cascade entity finish division cascade.
Wherein, step b division cascade entity carries out division cascade and comprises:
B1, determine the protocol Data Unit PDU size of the medium access control layer transmission of all kinds of QoS business data flows;
B2, the Service Data Unit of all kinds of QoS business data flows is carried out division cascade and adds the protocol Data Unit that packet header is encapsulated into such corresponding size and transmit.
Wherein, step b1 determines the protocol Data Unit PDU size of the medium access control layer transmission of all kinds of QoS business data flow appointment according to following manner:
B11, radio resource control RRC are specified the maximum protocol Data Unit PDU size of the medium access control layer transmission of all kinds of QoS business data flows, under the condition less than described maximum protocol Data Unit PDU size, the protocol Data Unit PDU size of the medium access control layer transmission of such QoS business data flow appointment is determined in indication according to physical layer; Or
It is fixed size that b12, radio resource control RRC are specified the protocol Data Unit PDU of the medium access control layer transmission of all kinds of QoS business data flows; Or
B13, for all QoS business data flows according to the QoS classification, radio resource control RRC is specified corresponding protocol Data Unit size according to described QoS classification.
Wherein, step b2 is encapsulated into protocol Data Unit with Service Data Unit and adopts following optionally mode:
A plurality of Service Data Units are cut apart be encapsulated into a protocol Data Unit, cut apart for Service Data Unit and finish the partial buffering that surpasses the transmittability of eating dishes without rice or wine and get up to wait for next prioritised transmission; Or
A Service Data Unit is encapsulated into a protocol Data Unit; Or
A plurality of Service Data Unit cascades are encapsulated into a protocol Data Unit.
Wherein, the described packet header of step b2 interpolation comprises following one or more indication at least: the filling value of guarantee agreement data cell PDU length, represent the indication of Service Data Unit SDU position among the protocol Data Unit PDU, protocol Data Unit PDU sequence number, whether Presentation protocol data unit PDU is through the division cascade indication, represent the indication of Service Data Unit SDU length among the protocol Data Unit PDU, the indication of Presentation protocol data unit PDU type, whether presentation protocol data data cell PDU is through the simple indication of packing and connecting, the indication of Service Data Unit SDU number among the Presentation protocol data unit PDU.
Wherein, the Service Data Unit SDU of step a reception is divided into real time business and non-real-time service data flow according to QoS.
Alternatively, step b specifically comprises:
Specify the maximum protocol Data Unit PDU size of medium access control layer transmission by radio resource control RRC for real time business and non-real-time service;
Under the condition less than described maximum protocol Data Unit PDU size, described division cascade entity carries out protocol Data Unit PDU that division cascade be built into suitable size according to physical layer indication to Service Data Unit SDU at each maximum transmission time interval T TI and transmits.
Alternatively, step b specifically comprises:
Specify the protocol Data Unit PDU maximum of medium access control layer transmission by radio resource control RRC for non-VOIP real time business and non-real-time service;
Under the condition less than described maximum protocol Data Unit PDU peak, its division cascade entity is that the protocol Data Unit PDU of suitable size transmit according to physical layer indication with the Service Data Unit SDU division cascade of described non-VOIP real time business and non-real-time service at each maximum transmission time interval T TI;
For the VOIP real time business, specify the fixing sizes values of the protocol Data Unit PDU of medium access control layer transmission by radio resource control RRC, its division cascade entity according to this indication to the Service Data Unit SDU division cascade of VOIP business, for the protocol Data Unit PDU of fixed size value transmits.
Alternatively, step b specifically comprises:
Specify the protocol Data Unit PDU peak of medium access control layer transmission by radio resource control RRC for non-VOIP real time business and non-real-time service;
Under less than the peaked condition of described protocol Data Unit PDU, its division cascade entity indicates the Service Data Unit SDU to described real time business and non-real-time service to carry out division cascade at each maximum transmission time interval T TI according to physical layer, and the protocol Data Unit PDU that is built into suitable size transmits;
For the VOIP real time business, the division cascade entity transmits the Service Data Unit SDU of each VOIP business as the PDU of a medium access control layer.
Alternatively, step b specifically comprises:
For non-VOIP real time business, specify the peak of the protocol Data Unit PDU of medium access control layer transmission by radio resource control RRC, in being no more than the scope of peak, the division cascade entity is that the protocol Data Unit PDU of suitable size and quantity transmits according to physical layer indication to the Service Data Unit SDU division cascade of described real time business;
For the VOIP real time business, radio resource control RRC is specified fixing protocol Data Unit PDU size, and its division cascade entity is cut apart the protocol Data Unit that is configured to described fixed size with the Service Data Unit of described VOIP real time business and transmitted;
For non-real-time service, the value of the fixed size of the protocol Data Unit PDU of radio resource control RRC appointment medium access control layer transmission, indicate the protocol Data Unit PDU of its division cascade entity according to this, and indication determines that the one or more PDU of connection transmit in a Transmission Time Interval TTI according to physical layer with the described fixed size of Service Data Unit SDU division cascade of described non-real-time service.
Alternatively, step b specifically comprises:
For non-real-time service, specify the peak of the protocol Data Unit PDU of medium access control layer transmission by radio resource control RRC, in being no more than the scope of peak, its division cascade entity indicates the Service Data Unit SDU to this non-real-time service to carry out division cascade according to physical layer, and the protocol Data Unit PDU that is configured to suitable size transmits in a TTI;
For the VOIP real time business, specify the protocol Data Unit PDU of relative fixed size by radio resource control RRC, its division cascade entity is configured to the protocol data data cell PDU of described fixed size with the Service Data Unit SDU division cascade of described VOIP business;
For non-VOIP real time business, specify the value of the protocol Data Unit PDU relative fixed size of medium access control layer transmission by radio resource control RRC, its division cascade entity is according to the Service Data Unit SDU division cascade of this indication with described non-VOIP real time business, be configured to the protocol Data Unit PDU of described fixed size, and determine the protocol Data Unit PDU quantity in a TTI, transmitted according to physical layer indication.
Alternatively, step b specifically comprises:
For Service Data Unit SDU isometric and less in real time business or the real time business, its division cascade entity carries out simple cascade according to the physical layer demand of eating dishes without rice or wine to the Service Data Unit SDU of described fixed size, adds the protocol Data Unit that the packet header that includes the simple cascade indication is configured to suitable size and transmits.
Alternatively, step b comprises:
For each maximum transmission time interval T TI, the transmitted data amount that the physical layer indication is suitable, the division cascade entity of described real time business or non-real-time service is according to the definite Service Data Unit SDU quantity that can transmit of described indication; With the Service Data Unit SDU cascade of the real time business or the real time business of described quantity, add the packet header that includes expression Service Data Unit SDU cascade indication and be configured to a protocol Data Unit PDU and transmit.
Alternatively, step b comprises:
For real time business, should be encapsulated into a protocol Data Unit PDU by each Service Data Unit SDU of business, in a maximum transmission time interval T TI, send;
For non-real-time service, the Service Data Unit SDU that this is professional cascades up, and adds the packet header structure that includes expression Service Data Unit SDU cascade indication and transmit as a protocol Data Unit PDU.
Alternatively, step b comprises:
Real-time and non-real-time service are set the bound of the protocol Data Unit PDU of medium access control transmission respectively by radio resource control RRC, Service Data Unit SDU real-time and non-real-time service between described bound does not carry out division cascade, and the packet header structure that its division cascade entity separately adds a Service Data Unit SDU indication that only comprises Presentation protocol data unit PDU sequence number transmits as a protocol Data Unit PDU packing;
Outside described bound, give me Service Data Unit SDU real-time and non-real-time service, the division cascade entity of described real time business or non-real-time service indicates the Service Data Unit to this real time business or non-real-time service to carry out division cascade according to physical layer, add including the protocol Data Unit PDU that the packet header of carrying out the division cascade indication is configured to suitable size, indication sends one or more protocol Data Unit PDU according to physical layer at each maximum transmission time interval T TI.
Alternatively, step b specifically comprises:
Real-time and non-real-time service are set the upper bound of the protocol Data Unit PDU of medium access control layer transmission by radio resource control RRC, Service Data Unit SDU less than the described upper bound does not carry out division cascade, add include do not carry out the division cascade indication packet header directly as a protocol Data Unit PDU;
The Service Data Unit SDU that surpasses the described upper bound, the division cascade entity by the physical layer indication should business the Service Data Unit division cascade, add including the protocol Data Unit PDU that the packet header of carrying out the division cascade indication constitutes suitable size;
Each maximum transmission time interval T TI sends one or more protocol Data Unit PDU by the physical layer indication.
Alternatively, for the different QoS business data flow, the protocol Data Unit serial number range difference of interpolation, wherein the serial number range of real time business protocol Data Unit PDU packet is littler than the sequence number of non-real-time service protocol Data Unit PDU packet.
Compared with prior art, the present invention has following beneficial effect:
The present invention is categorized as various QoS business data flows by the Service Data Unit SDU that will receive according to service quality QoS; Then the Service Data Unit division cascade of the described all kinds of QoS business data flows protocol Data Unit PDU for the medium access control layer transmission of such appointment is transmitted, can adapt to the low time delay of new network system, the requirement of low-complexity, and need understand the characteristic of each data QoS in conjunction with the complete IP network media access control sublayer, new MAC division cascade implementation method has been proposed, be more suitable for the mechanism of the OFDM physical layer of following LTE system, help to realize the transmission of Fast Packet business.
Description of drawings
Fig. 1 is that the UMTS system is called WCDMA communication system structural representation;
Fig. 2 is that the UMTS system is called WCDMA communication system network formation schematic diagram;
Fig. 3 is the protocol architecture schematic diagram of wave point;
Fig. 4 is a data segmentation cascade transmitting method flow chart of the present invention.
Embodiment
Core of the present invention is the division cascade function of RLC and MAC is realized at MAC, and the function that repeats with comprehensive original two sublayers, and adapt to new physical layer and satisfy design requirement faster and better is finished the processing that various IP wrap in media access control sublayer.
Along with RLC and MAC merge, division cascade carries out at MAC, because RLC cancels no longer individualism, UM/TM/AM does not just exist yet.But for different packets, the division cascade mode can be different.With reference to figure 4, among the present invention for transmit the packet that gets off from logic channel, need distinguish, at first in step 11, the Service Data Unit SDU that receives is categorized as various QoS business data flows according to service quality QoS,, all kinds of QoS business data flows is selected certain division cascade mode then in step 12, with the Service Data Unit division cascade of all kinds of QoS business data flows is the protocol Data Unit PDU of the medium access control layer transmission of such appointment, re-sends to physical layer and transmits.
Above-mentioned for the SDU that gets off from high level, need carry out QoS and distinguish, the business datum of different QoS is carried out different division cascade operations.At this moment media access control sublayer is fully to understand for QoS.During specific implementation, mainly be divided into real time business and non-real-time service data flow, division cascade can be the identical QoS business data flow at certain business, also can be at different business through the identical QoS business data flow after multiplexing, or the different business data are through the QoS business data flow not of the same race after multiplexing.Usually, the packet size that real time business is cut apart is smaller, and non-real-time service relates to re-transmission, and the packet of division cascade is adapted at a TTI transmission more greatly.Serial number range TSN real-time in addition and the non-real-time data bag is also inequality, and in general the sequence number than non-real-time service packet is little usually for the TSN serial number range of real time business packet.
Division cascade is finished in the division cascade entity as the function of media access control sublayer among the present invention, and this entity can dynamically generate when promptly transfer of data being arranged and set up entity by the high level indication.Chuan Shu data and professional QoS set up one or more entities simultaneously as required.Each division cascade entity handles can be a certain QoS business, also can be to have the multiplexing data flow of identical QoS different business.
Concrete partition cascade method is a protocol Data Unit PDU size of at first determining the medium access control layer transmission of all kinds of QoS business data flows, described PDU size is mainly indicated according to RRC, and it is definite in conjunction with the physical layer demand, can adopt multiple mode during specific implementation, for example RRC specifies the maximum protocol Data Unit PDU size of the medium access control layer transmission of all kinds of QoS business data flows, under the condition less than described maximum protocol Data Unit PDU size, the protocol Data Unit PDU size of the medium access control layer transmission of such QoS business data flow appointment is determined in indication according to physical layer; Or
It is fixed size that RRC specifies the protocol Data Unit PDU of the medium access control layer transmission of all kinds of QoS business data flows; Or
According to the QoS classification, RRC specifies corresponding protocol Data Unit size according to described QoS classification for all QoS business data flows.
After determining that all kinds of QoS business data flows transmit the PDU size of data, can will give the SDU that comes from the upper strata according to certain rule and cut apart the described PDU that is cascaded into described size, add the protocol Data Unit transmission that packet header is encapsulated into such corresponding size, when specifically Service Data Unit SUD being encapsulated into the PDU transmission, can adopt multiple mode, for example a plurality of Service Data Units are cut apart and be encapsulated into a protocol Data Unit, cut apart for Service Data Unit and finish the partial buffering that surpasses the transmittability of eating dishes without rice or wine and get up to wait for next prioritised transmission; Or a Service Data Unit is encapsulated into a protocol Data Unit; Or a plurality of Service Data Unit cascades are encapsulated into a protocol Data Unit; In addition, according to different division cascade load modes, described packet header comprises following one or more indication at least: the indication of SDU number among the indication whether whether indication, PDU sequence number, expression PDU that guarantees SDU position in the filling value, PDU of expression of PDU length connect through simple packing through the indication of the indication of SDU length among division cascade indication, PDU of expression, expression PDU type, expression PDU, the expression PDU.
At some in particular cases,,, be about to one or more MAC PDU and link together among the present invention, in a TTI, be transferred to physical layer for the good PDU of the division cascade processing of need packing such as special two-forty requirement.
Following mask body describes.
Among the present invention for the SDU that receives from high-rise Different Logic channel buffer memory and utilize QoS to be divided into real-time and non real-time two class QoS business data flows at first, wherein real time business comprises general real time business such as timely picture or image etc. and speech business such as VOIP data, and background class and interactive class were such as Email when non-real-time service was main.In general non-real-time service need not retransmit assurance owing to the low error rate demand to real time business because strict delay requirement does not need to retransmit.But some in particular cases, and some non-real-time services also need low the delay to guarantee also can not do retransmission operation such as the MBMS business.Distinguish again in the different division cascade entities for these data and to operate.
The TSN indication is different for the data of different service types in the packet header of the present invention, and in general the sequence number than non-real-time service packet is little usually for the serial number range of real time business packet.
The establishing method of PDU size and setting identification are according to different service types and different.RRC sets different service types PDU maximum length, and wherein non-real-time service PDU length is more greatly such as 256octets or 512octets; Real time business PDU length is less such as about 128octets.For each TTI, physical layer is according to size and the number of the PDU of the ability notice needs of eating dishes without rice or wine, and under the condition that is no more than the PDU maxsize, MAC becomes the MAC PDU of suitable size according to this indication division cascade.
The PDU that finishes for division cascade sends into next MAC protocol element and does corresponding operating, and the real time business data can send a plurality of PDU in TTI, and non-real-time service relates to retransmission mechanism, generally PDU of each TTI transmission.
Be divided into real time business with the Service Data Unit SDU that receives according to QoS below and the non-real-time service data flow is elaborated to data segmentation cascade method of the present invention.
First embodiment
Specify the maximum protocol Data Unit PDU size of medium access control layer transmission by RRC for real time business and non-real-time service data flow;
B2, under condition less than described maximum protocol Data Unit PDU size, described division cascade entity is indicated according to physical layer at each maximum transmission time interval T TI Service Data Unit SDU is carried out division cascade, and the protocol Data Unit PDU that interpolation packet header is built into suitable size transmits.
Second embodiment
Specify the protocol Data Unit PDU maximum of medium access control layer transmission by RRC for non-VOIP real time business and non-real-time service data flow;
Under less than the peaked condition of described maximum protocol Data Unit PDU, the division cascade entity indicates the Service Data Unit SDU with described non-VOIP real time business and non-real-time service data flow to carry out division cascade at each maximum transmission time interval T TI according to physical layer, and the protocol Data Unit PDU that interpolation packet header is configured to suitable size transmits;
For VOIP real time business data flow, specify the fixing sizes values of the protocol Data Unit PDU of medium access control layer transmission by RRC, the division cascade entity adds the protocol Data Unit PDU that packet header is configured to the fixed size value according to the Service Data Unit SDU division cascade of this indication to VOIP real time business data flow.
The 3rd embodiment
Specify the protocol Data Unit PDU maximum of medium access control layer transmission by RRC for non-VOIP real time business and non-real-time service data flow;
Under less than the peaked condition of described protocol Data Unit PDU, the division cascade entity indicates the Service Data Unit SDU to described real time business and non-real-time service data flow to carry out division cascade at each maximum transmission time interval T TI according to physical layer, and the protocol Data Unit PDU that interpolation packet header is built into suitable size transmits;
For the VOIP real time business, the division cascade entity adds the PDU transmission of packet header as a medium access control layer with the Service Data Unit SDU of each VOIP real time business data flow.
The 4th embodiment
Be divided into several grades for all professional protocol Data Unit PDU sizes according to QoS, be divided into the fixing data block of corresponding size by the RRC notice, wherein non-real-time service data flow data bag is bigger, and real time business data flow data bag is less;
Indicate according to physical layer at each maximum transmission time interval T TI, the division cascade entity determines that the real time business data flow sends several packets, one or several PDU packing that division cascade is good of non-real-time service data flow connects into a PDU, adds packet header and sends in a TTI.
The 5th embodiment
For non-VOIP real time business data flow, specify the peak of the protocol Data Unit PDU of medium access control layer transmission by RRC, in being no more than the scope of peak, the division cascade entity indicates the Service Data Unit SDU to described real time business data flow to carry out division cascade according to physical layer, and the protocol Data Unit PDU that interpolation packet header is configured to suitable size and quantity transmits;
For VOIP real time business data flow, RRC specifies fixing protocol Data Unit PDU size, the division cascade entity is cut apart the Service Data Unit of described VOIP real time business data flow, adds the protocol Data Unit that corresponding packet header is configured to described fixed size and transmits;
For the non-real-time service data flow, the value of the fixed size of the protocol Data Unit PDU of RRC appointment medium access control layer transmission, indicate the Service Data Unit SDU division cascade of its division cascade entity according to this with described non-real-time service data flow, add the protocol Data Unit PDU that corresponding packet header is configured to described fixed size, and indication determines that the one or more PDU of connection transmit in a TTI according to physical layer.
The 6th embodiment
For the non-real-time service data flow, specify the peak of the protocol Data Unit PDU of medium access control layer transmission by RRC, in being no more than the scope of peak, its division cascade entity carries out division cascade according to physical layer indication to the Service Data Unit SDU of this non-real-time service data flow, adds the protocol Data Unit PDU that corresponding packet header is configured to suitable size and transmits in a TTI;
For VOIP real time business data flow, specify the protocol Data Unit PDU of relative fixed size by RRC, its division cascade entity adds the protocol data data cell PDU that corresponding packet header is configured to described fixed size with the Service Data Unit SDU division cascade of described VOIP business data flow;
For non-VOIP real time business data flow, specify the value of the protocol Data Unit PDU relative fixed size of medium access control layer transmission by RRC, its division cascade entity is according to the Service Data Unit SDU division cascade of this indication with described non-VOIP real time business data flow, add the protocol Data Unit PDU that corresponding packet header is configured to described fixed size, and determine the PDU quantity in a TTI, transmitted according to physical layer indication.
The 7th embodiment
For Service Data Unit SDU isometric and less in real time business or the real time business data flow, its division cascade entity carries out simple cascade according to the physical layer demand of eating dishes without rice or wine to the SDU of described fixed size, and the protocol Data Unit that corresponding packet header of indication of adding the number of the size that comprises each Service Data Unit SDU among this PDU and SDU is configured to suitable size transmits.
The 8th embodiment
For each maximum transmission time interval T TI, the transmitted data amount that the physical layer indication is suitable, the division cascade entity of described real time business or non-real-time service data flow is according to the definite SDU quantity that can transmit of described indication; With the real time business of described quantity or the Service Data Unit SDU cascade of real time business data flow, add the corresponding packet header include SDU cascade indication and be configured to a protocol Data Unit PDU and transmit.
The 9th embodiment
For the real time business data flow, the packet header of each Service Data Unit SDU of this business data flow being added the TSN that comprises the PAD that guarantees PDU length, expression PDU sequence number makes up as a protocol Data Unit PDU, sends in a maximum transmission time interval T TI;
For the non-real-time service data flow, the Service Data Unit SDU that this is professional cascades up, and adds the packet header structure that includes SDU cascade indication and transmit as a protocol Data Unit PDU.
The tenth embodiment
Real-time and non-real-time service data flow are set the bound of the protocol Data Unit PDU of medium access control transmission respectively by RRC, Service Data Unit SDU real-time and non-real-time service between described bound does not carry out division cascade, and the packet header structure that its division cascade entity separately adds a Service Data Unit SDU indication that only comprises expression PDU sequence number transmits as a protocol Data Unit PDU packing;
Outside described bound in real time and the Service Data Unit SDU of non-real-time service data flow, the division cascade entity of described real time business or non-real-time service data flow indicates the Service Data Unit SDU to this real time business or non-real-time service data flow to carry out division cascade according to physical layer, add including the protocol Data Unit PDU that the packet header of whether carrying out the division cascade indication is configured to suitable size, indication sends one or more protocol Data Unit PDU according to physical layer at each maximum transmission time interval T TI.
The 11 embodiment
Real-time and non-real-time service data flow are set the upper bound of the protocol Data Unit PDU of medium access control layer transmission by RRC, Service Data Unit SDU less than the described upper bound does not carry out division cascade, add include do not carry out the division cascade indication packet header directly as a protocol Data Unit PDU;
The Service Data Unit SDU that surpasses the described upper bound, the division cascade entity adds including the protocol Data Unit PDU that the packet header of whether carrying out the division cascade indication constitutes suitable size by the Service Data Unit division cascade of physical layer indication with this business data flow;
Each maximum transmission time interval T TI sends one or more protocol Data Unit PDU by the physical layer indication.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (18)
1, a kind of data segmentation cascade transmitting method, the medium access control layer that is used for the radio communication evolvement network transmits data, it is characterized in that described method comprises:
A, the Service Data Unit SDU that receives is categorized as various service quality QoS business data flows according to service quality QoS;
B, with the Service Data Unit SDU division cascade of all kinds of service quality QoS business data flows in the protocol Data Unit PDU of the medium access control layer transmission of respective class appointment, and transmit.
2, data segmentation cascade transmitting method according to claim 1, it is characterized in that, the division cascade entity of dynamically being set up during data by transmission among the step b carries out division cascade to the Service Data Unit SDU of described all kinds of service quality QoS business data flows, the utilization of different service quality QoS business data flow separately independently the division cascade entity finish division cascade.
3, data segmentation cascade transmitting method according to claim 2 is characterized in that, described division cascade entity carries out division cascade and comprises:
B1, determine the protocol Data Unit PDU size of the medium access control layer transmission of all kinds of service quality QoS business data flows;
B2, the Service Data Unit of all kinds of service quality QoS business data flows is carried out division cascade and adds the protocol Data Unit PDU that packet header is encapsulated into all kinds of corresponding sizes and transmit.
4, data segmentation cascade transmitting method according to claim 3 is characterized in that, step b1 determines the protocol Data Unit PDU size of the medium access control layer transmission of all kinds of service quality QoS business data flow appointment according to following manner:
B11, radio resource control RRC are specified the maximum protocol Data Unit PDU size of the medium access control layer transmission of all kinds of service quality QoS business data flows, under condition, determine the protocol Data Unit PDU size of the medium access control layer transmission of all kinds of service quality QoS business data flow appointment according to the physical layer indication less than described maximum protocol Data Unit PDU size; Or
It is fixed size that b12, radio resource control RRC are specified the protocol Data Unit PDU of the medium access control layer transmission of all kinds of service quality QoS business data flows; Or
B13, for all service quality QoS business data flows according to the service quality QoS classification, radio resource control RRC is specified corresponding protocol Data Unit PDU size according to described service quality QoS classification.
5, data segmentation cascade transmitting method according to claim 3 is characterized in that, describedly Service Data Unit SDU is encapsulated into protocol Data Unit PDU adopts following optionally mode:
A plurality of Service Data Unit SDU are cut apart be encapsulated into a protocol Data Unit PDU, cut apart for Service Data Unit SDU and finish the partial buffering that surpasses the transmittability of eating dishes without rice or wine and get up to wait for next prioritised transmission; Or
A Service Data Unit SDU is encapsulated into a protocol Data Unit PDU; Or
A plurality of Service Data Unit SDU cascade is encapsulated into a protocol Data Unit PDU.
6, data segmentation cascade transmitting method according to claim 3, it is characterized in that the packet header of described interpolation comprises following one or more indication at least: the filling value of guarantee agreement data cell PDU length, represent the indication of Service Data Unit SDU position among the protocol Data Unit PDU, protocol Data Unit PDU sequence number, whether Presentation protocol data unit PDU is through the division cascade indication, represent the indication of Service Data Unit SDU length among the protocol Data Unit PDU, the indication of Presentation protocol data unit PDU type, whether presentation protocol data data cell PDU is through the simple indication of packing and connecting, the indication of Service Data Unit SDU number among the Presentation protocol data unit PDU.
According to each described data segmentation cascade transmitting method of claim 1-6, it is characterized in that 7, the Service Data Unit SDU that step a receives is divided into real time business and non-real-time service data flow according to service quality QoS.
8, data segmentation cascade transmitting method according to claim 7 is characterized in that, step b specifically comprises:
Specify the maximum protocol Data Unit PDU size of medium access control layer transmission by radio resource control RRC for real time business and non-real-time service data flow;
Under the condition less than described maximum protocol Data Unit PDU size, described division cascade entity carries out protocol Data Unit PDU that division cascade be built into suitable size according to physical layer indication to Service Data Unit SDU at each maximum transmission time interval T TI and transmits.
9, data segmentation cascade transmitting method according to claim 7 is characterized in that, step b specifically comprises:
Specify the protocol Data Unit PDU maximum of medium access control layer transmission by radio resource control RRC for non-real-time service and non-VOIP real time business data flow;
Under less than the peaked condition of described maximum protocol Data Unit PDU, its division cascade entity is that the protocol Data Unit PDU of suitable size transmit according to physical layer indication with the Service Data Unit SDU division cascade of described non-VOIP real time business and non-real-time service at each maximum transmission time interval T TI;
For VOIP real time business data flow, specify the fixing sizes values of the protocol Data Unit PDU of medium access control layer transmission by radio resource control RRC, its division cascade entity according to this indication to the Service Data Unit SDU division cascade of VOIP business, for the protocol Data Unit PDU of fixed size value transmits.
10, data segmentation cascade transmitting method according to claim 7 is characterized in that, step b specifically comprises:
Specify the protocol Data Unit PDU maximum of medium access control layer transmission by radio resource control RRC for non-real-time service and non-VOIP real time business data flow;
Under less than the peaked condition of described protocol Data Unit PDU, its division cascade entity indicates the Service Data Unit SDU to described real time business and non-real-time service data flow to carry out division cascade at each maximum transmission time interval T TI according to physical layer, and the protocol Data Unit PDU that is built into suitable size transmits;
For VOIP real time business data flow, the division cascade entity transmits the Service Data Unit SDU of each VOIP business as the protocol Data Unit PDU of a medium access control layer.
11, data segmentation cascade transmitting method according to claim 7 is characterized in that, step b specifically comprises:
For non-VOIP real time business data flow, specify the maximum of the protocol Data Unit PDU of medium access control layer transmission by radio resource control RRC, in being no more than peaked scope, the division cascade entity is that the protocol Data Unit PDU of suitable size and quantity transmits according to physical layer indication to the Service Data Unit SDU division cascade of described non-VOIP real time business data flow;
For VOIP real time business data flow, radio resource control RRC is specified fixing protocol Data Unit PDU size, and its division cascade entity is cut apart the protocol Data Unit that is configured to described fixed size with the Service Data Unit of described VOIP real time business data flow and transmitted;
For the non-real-time service data flow, the value of the fixed size of the protocol Data Unit PDU of radio resource control RRC appointment medium access control layer transmission, indicating its division cascade entity according to this is the protocol Data Unit PDU of described fixed size with the Service Data Unit SDU division cascade of described non-real-time service data flow, and indication determines that the one or more protocol Data Unit PDU of connection transmit in a Transmission Time Interval TTI according to physical layer.
12, data segmentation cascade transmitting method according to claim 7 is characterized in that, step b specifically comprises:
For the non-real-time service data flow, specify the maximum of the protocol Data Unit PDU of medium access control layer transmission by radio resource control RRC, in being no more than peaked scope, its division cascade entity indicates the Service Data Unit SDU to this non-real-time service data flow to carry out division cascade according to physical layer, and the protocol Data Unit PDU that is configured to suitable size transmits in a Transmission Time Interval TTI;
For VOIP real time business data flow, specify the protocol Data Unit PDU of relative fixed size by radio resource control RRC, its division cascade entity is configured to the protocol data data cell PDU of described fixed size with the Service Data Unit SDU division cascade of described VOIP business data flow;
For non-VOIP real time business data flow, specify the value of the protocol Data Unit PDU relative fixed size of medium access control layer transmission by radio resource control RRC, its division cascade entity is according to the Service Data Unit SDU division cascade of this indication with described non-VOIP real time business data flow, be configured to the protocol Data Unit PDU of described fixed size, and determine the protocol Data Unit PDU quantity in a Transmission Time Interval TTI, transmitted according to physical layer indication.
13, data segmentation cascade transmitting method according to claim 7 is characterized in that, step b specifically comprises:
Service Data Unit SDU for equal length in real time business or the non-real-time service data flow, its division cascade entity carries out simple cascade according to the physical layer demand of eating dishes without rice or wine to the Service Data Unit SDU of described fixed size, adds the protocol Data Unit PDU that the packet header that includes the simple cascade indication is configured to suitable size and transmits.
14, data segmentation cascade transmitting method according to claim 7 is characterized in that, step b comprises:
For each maximum transmission time interval T TI, the transmitted data amount that the physical layer indication is suitable, the division cascade entity of described real time business or non-real-time service data flow is according to the definite Service Data Unit SDU quantity that can transmit of described indication; With the real time business of described quantity or the Service Data Unit SDU cascade of real time business data flow, add the packet header include expression Service Data Unit SDU cascade indication and be configured to a protocol Data Unit PDU and transmit.
15, data segmentation cascade transmitting method according to claim 7 is characterized in that, step b comprises:
For the real time business data flow, each Service Data Unit SDU is encapsulated into a protocol Data Unit PDU with this business data flow, sends in a maximum transmission time interval T TI;
For the non-real-time service data flow, the Service Data Unit SDU of this business data flow is cascaded up, and add the packet header that includes expression Service Data Unit SDU cascade indication and make up as a protocol Data Unit PDU and transmit.
16, data segmentation cascade transmitting method according to claim 7 is characterized in that, step b comprises:
Real-time and non-real-time service data flow are set the bound of the protocol Data Unit PDU of medium access control transmission respectively by radio resource control RRC, Service Data Unit SDU real-time and the non-real-time service data flow between described bound does not carry out division cascade, and the packet header structure that its division cascade entity separately adds a Service Data Unit SDU indication that only comprises Presentation protocol data unit PDU sequence number transmits as a protocol Data Unit PDU packing;
Outside described bound in real time and the Service Data Unit SDU of non-real-time service data flow, the division cascade entity of described real time business or non-real-time service data flow indicates the Service Data Unit to this real time business or non-real-time service data flow to carry out division cascade according to physical layer, add including the protocol Data Unit PDU that the packet header of whether carrying out the division cascade indication is configured to suitable size, indication sends one or more protocol Data Unit PDU according to physical layer at each maximum transmission time interval T TI.
17, data segmentation cascade transmitting method according to claim 7 is characterized in that, step b specifically comprises:
Real-time and non-real-time service data flow are set the upper bound of the protocol Data Unit PDU of medium access control layer transmission by radio resource control RRC, Service Data Unit SDU less than the described upper bound does not carry out division cascade, and interpolation includes the packet header of whether carrying out the division cascade indication and directly transmits as a protocol Data Unit PDU;
The Service Data Unit SDU that surpasses the described upper bound, the division cascade entity by the physical layer indication should business the Service Data Unit division cascade, add including the protocol Data Unit PDU that the packet header of whether carrying out the division cascade indication constitutes suitable size and transmit;
Each maximum transmission time interval T TI sends one or more protocol Data Unit PDU by the physical layer indication.
18, data segmentation cascade transmitting method according to claim 7, it is characterized in that, for the different QoS business data flow, the protocol Data Unit PDU serial number range difference of adding, wherein the serial number range of the protocol Data Unit PDU packet of real time business data flow is littler than the sequence number of the protocol Data Unit PDU packet of non-real-time service data flow.
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| CN110312226A (en) * | 2018-03-20 | 2019-10-08 | 华为技术有限公司 | Transmit the method and communication device of data |
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