CN1859037A - Transmitting and receiving method for high speed medium cut-in control grouping data unit - Google Patents
Transmitting and receiving method for high speed medium cut-in control grouping data unit Download PDFInfo
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Abstract
This invention discloses a transmission and receiving method for MAC-hs PDU of a high speed media access control packet data unit, in which, the method includes: A, when the MAC-d PDU length for loading of the MAC-hs PDUprovided to the UE by Node B is shorter than that of the MAC-d PDU of the special channel media access control packet data unit being sent to the UE, Node B segments the MAC-d PDU based on the length of the MAC-hs PDU, B, Node B loads one or more than one segments of MAC-d PDU on one or more than one MAC-hs PDU to send them to the UE via the high speed down share channel HS-DSCH, in which, when the length of the MAC-hs PDC is smaller than that of the MAC-d PDU to be sent, the MAC-d PDU can be loaded on the MAC-hs PDU and transmitted to the UE via HS-DSCH.
Description
Technical field
The high speed descending sharing channel (HS-DSCH) that the present invention relates in Wideband Code Division Multiple Access (WCDMA) (WCDMA) system is gone up the technology that transmits data, particularly a kind of method of sending and receiving that transmits high speed medium cut-in control grouping data unit (MAC-hs PDU) by HS-DSCH.
Background technology
At present, in version (Realse) standard of WCDMA system, introduced high speed downlink packet access (HSDPA) technology, this technology is the service that subscriber equipment (UE) provides the high-speed transfer downlink data, and the transmission rate of transmitting downlink data can reach 12.779 mbit/(Mbps) in theory.HS-DSCH is exactly the DSCH Downlink Shared Channel that adopts the HSDPA technology to set up.The Transmission Time Interval of HS-DSCH (TTI) is fixed as 2 milliseconds (ms).In a TTI, when cell base station (Node B) sends downlink data to the UE among the Node B by HS-DSCH, Node B is carried on a plurality of dedicated channel medium cut-in control grouping data units that will send (MAC-d PDU) among the MAC-hs PDU, sends to UE by HS-DSCH.Wherein, MAC-d PDU is the PDU that Node B adopts by low speed DSCH Downlink Shared Channel transmitting downlink data the time, the number of carrying MAC-d PDU is determined according to the length of current MAC-hs PDU, MAC-hs PDU is big more, the number of carrying MAC-d PDU is many more, and the transmission rate that UE can access is also just high more.
Fig. 1 is the structural representation of prior art MAC-hs PDU, and MAC-hs PDU is made up of high speed media access control head (MAC-hs header), high speed media access control service data unit (MAC-hsSDU) and three parts of filling bit field (Padding).Wherein, the byte that MAC-hs header takies (bit) number is made up of VF, Quene ID, TSN, SID, N and F more than or equal to 21.VF takies 1 bit, the expression version flag; Quene ID takies 3 bit, the expression queue identity; TSN takies 6 bits, the expression transmission sequence number; SID takies 3bit, the call number of expression MAC-d SDU length; N takies 7 bit, is illustrated in the number of the MAC-d SDU of same length in the MAC-hs PDU; F takies 3bit, and being illustrated in the interior follow-up MAC-d SDU of different length in addition of a MAC-hs PDU needs transmission.When the follow-up MAC-d SDU that also has different length need transmit in a MAC-hs PDU, then organize SID, N with next again and F identifies.MAC-hsSDU is exactly MAC-d PDU, Padding be exactly when the number of the MAC-d SDU that will send fewer and when not reaching the length of MAC-hs PDU, the field that insignificant character is filled.
Fig. 2 is the Node B of prior art sends downlink data by the UE of HS-DSCH in Node B a flow chart, set in advance channel quality indication (CQI) mapping table among the Node B, adopt this mapping table just can obtain corresponding MAC-hs PDU length according to CQI value and transmitting power, the concrete steps of this method are:
UE among step 200, the Node B sends self detected CQI value to Node B.
The CQI value of this UE that step 201, Node B basis receive and the current maximum transmission power that can distribute for this UE find corresponding MAC-hs PDU length in the CQI mapping table.
According to the agreement regulation, MAC-hs PDU length range is 137bit～25558bit.
If there is not the MAC-d PDU that will send to this UE to send in this TTI, the MAC-d PDU that can also adopt the described method of Fig. 2 will also not send to this UE in next TTI sends to this UE.
Adopt the described method of Fig. 2 to send downlink data by HS-DSCH, exist a shortcoming: as MAC-hs PDU during less than the length of a MAC-d PDU that will send, the MAC-d PDU that Node B just can not send is carried among the MAC-hs PDU and sends, thereby can not guarantee that Node B sends downlink data by HS-DSCH continuously to UE.
Yet in reality, this situation is commonplace.For example: when UE is in the edge of Node B, the detected CQI value of this UE will be smaller, thereby CQI value and the current MAC-hs PDU length that can obtain to the maximum transmission power that this UE distributes according to this UE are also smaller, even less than the length of a MAC-d PDU that will send, the problem that Node B can not send downlink data by HS-DSCH will appear in this moment, influence the speed of HS-DSCH transmitting downlink data, thereby accelerated the decline of transmission rate that HS-DSCH carries.
Therefore, when the length of MAC-hs PDU during less than the length of a MAC-d PDU that will send, after being carried on MAC-hs PDU, a MAC-d PDU that how will send sends to UE by HS-DSCH, guarantee that Node B sends downlink data for UE by HS-DSCH continuously, becomes a problem demanding prompt solution.
Summary of the invention
In view of this, main purpose of the present invention is to provide the method for sending and receiving of a kind of MAC-hs PDU, and any one MAC-d PDU that this method can send sends to the UE reception by HS-DSCH after being carried on MAC-hs PDU.
According to above-mentioned purpose, technical scheme of the present invention is achieved in that
The sending method of a kind of high speed medium cut-in control grouping data unit MAC-hs PDU, this method comprises:
A, the MAC-d PDU length of Gong carrying during that provides MAC-hs PDU for user equipment (UE) as sub-district Node B less than the length of the dedicated channel medium cut-in control grouping data unit MAC-d PDU that will send to UE, Node B carries out segmentation with described MAC-d PDU according to the length of MAC-hs PDU;
B, Node B are carried on one or more MAC-hs PDU respectively with the MAC-d PDU of one or more segmentations, send to UE by high speed downlink shared channel HS-DSCH successively.
The described MAC-d PDU length of Gong the carrying of MAC-hs PDU that provides of steps A is: the length of the MAC-hs PDU that provides deducts the high speed media access control length that MAC-hs header length obtains of MAC-hs PDU.
The described MAC-hs PDU of step B carries the branch segment identification.
In the MAC-hs of MAC-hs PDU header the I territory is set, described minute segment identification is arranged on the I territory among the MAC-hs header of MAC-hs PDU.
Have TSN among the MAC-hs header of the described MAC-hs PDU of step B, this TSN adopts different sequence valves to identify the MAC-hs PDU of the MAC-d PDU of the different segmentations of having carried MAC-d PDU.
The described process of carrying out segmentation of steps A is:
The length of MAC-hs PDU is deducted the length that MAC-hs header length obtains the MAC-dPDU of segmentation, MAC-d PDU is carried out segmentation according to the length of the MAC-d PDU of resulting segmentation.
Step B is described to carry the one or more MAC-hs PDU of MAC-d PDU of one or more segmentations respectively by sending successively in the automatic repeat requests HARQ process of same mixing.
Step B is described with one or more MAC-hs PDU by the process that HS-DSCH sends to UE to be successively:
Before sending a MAC-hs PDU in order, Node B judges whether to receive previous MAC-hs PDU and acknowledges receipt of message really, if then send a MAC-hs PDU in order again; Otherwise, retransmit previous MAC-hs PDU, behind the number of retransmissions that reaches setting, Node B abandons previous MAC-hs PDU and the follow-up MAC-hs PDU that does not also send.
The method of reseptance of a kind of MAC-hs PDU, this method comprises:
A1, in this Transmission Time Interval TTI, UE receives MAC-hs PDU by HS-DSCH, judges whether received MAC-hs PDU carries the branch segment identification, if not, execution in step B1; Otherwise, execution in step C1;
That B1, UE determine MAC-hs PDU carrying is complete MAC-d PDU, and the complete MAC-d PDU that is carried is broken from MAC-hs PDU, obtains MAC-d PDU;
What C1, UE determined MAC-hs PDU carrying is the MAC-d PDU of segmentation, received MAC-hs PDU is carried out buffer memory, in next TTI, change steps A 1 over to, up to buffer memory carry respectively till the more than one MAC-hs PDU of MAC-d PDU of all segmentations of MAC-d PDU;
D1, UE will be successively the MAC-d PDU of the more than one MAC-hs PDU of the buffer memory segmentation of carrying respectively from corresponding M AC-hs PDU, break after cascade successively again, obtain MAC-dPDU.
Step C1 described up to buffer memory the deterministic process of carrying respectively till the more than one MAC-hs PDU of MAC-dPDU of all segmentations of MAC-d PDU be:
In each TTI, whether the MAC-d PDU that judges the segmentation that the MAC-hs PDU of institute's buffer memory is carried according to minute segment identification is the last segmentation of MAC-d PDU, if, the more than one MAC-hsPDU of MAC-d PDU of all segmentations of carrying MAC-d PDU that has been judged to be buffer memory; Otherwise, then in next TTI, continue the received MAC-hs PDU that carries the branch segment identification of buffer memory.
In the MAC-hs of MAC-hs PDU header the I territory is set, described minute segment identification is arranged on the I territory among the MAC-header of MAC-hs PDU.
Step D1 described will be successively the MAC-d PDU of the more than one MAC-hs PDU of the buffer memory segmentation of carrying respectively from corresponding M AC-hs PDU, break after more successively before the cascade, this method also comprises:
Node B be carried MAC-d PDU different segmentations MAC-d PDU MAC-hsPDU according to the segmentation order be provided with the order the TSN value, UE has judged whether buffer memory successively and has carried respectively from first of MAC-d PDU and be fragmented into all MAC-hsPDU with order TSN value of last segmentation, if, the step of cascade successively again after the MAC-d PDU that carries out the segmentation that the more than one MAC-hs PDU of buffer memory successively carries respectively breaks from corresponding M AC-hs PDU, otherwise, then abandon having carried respectively of institute's buffer memory and be fragmented into the MAC-hs PDU of last segmentation from first of MAC-d PDU.
Step C1 is described received MAC-hs PDU is carried out buffer memory before, this method also comprises:
UE sends MAC-hs PDU to Node B and acknowledges receipt of message really.
From such scheme as can be seen, method provided by the invention, when the length of MAC-hs PDU during less than the length of a MAC-d PDU that will send, after a MAC-d PDU that will send carries out segmentation, the MAC-d PDU of a plurality of segmentations is carried on respectively among a plurality of MAC-hs PDU sends to UE successively, after UE obtains a plurality of MAC-hs PDU, after the MAC-d PDU of a plurality of segmentations of respectively a plurality of MAC-hs PDU being carried breaks from the MAC-hs PDU of correspondence again, cascade again obtains MAC-d PDU.Therefore, method provided by the invention is when the length of MAC-hs pDU during less than the length of a MAC-d PDU that will send, after being carried on MAC-hs PDU, a MAC-d PDU that can send sends to UE by HS-DSCH, receive by UE, thereby guarantee that NodeB sends downlink data for UE by HS-DSCH continuously.
Description of drawings
Fig. 1 is the structural representation of prior art MAC-hs PDU.
Fig. 2 is the Node B of prior art sends downlink data by the UE of HS-DSCH in Node B a flow chart.
Fig. 3 is Node B of the present invention sends MAC-hs PDU by HS-DSCH a method flow diagram.
Fig. 4 is UE of the present invention receives MAC-hs PDU by HS-DSCH a method flow diagram.
Fig. 5 is the structural representation of MAC-hs PDU of the present invention.
Fig. 6 is the structure embodiment schematic diagram of MAC-hs PDU of the present invention.
Fig. 7 sends the specific embodiment flow chart of the MAC-hs PDU of the MAC-d PDU that has carried segmentation by HS-DSCH for Node B of the present invention.
Fig. 8 has received the carrying of sending by HS-DSCH for the UE of the present invention specific embodiment flow chart of MAC-hs PDU of MAC-dPDU of segmentation.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, below lift specific embodiment and, the present invention is described in more detail with reference to accompanying drawing.
When transmitting downlink data, in order to guarantee the accuracy of downlink data transmission, prior art adopts wireless chain control layer determination (RLC AM) pattern.Under RLC AM pattern, need to comprise the dedicated channel medium access control head (MAC-d header) of at least 16 bit among each MAC-d PDU, if the length of the MAC-d PDU that sets is smaller, MAC-d header expense ratio then is bigger, and the efficient of downlink data transmission is lower.So it is unsuitable too small that the length of the existing MAC-d PDU that is provided with is set as required and set.Therefore, cover more weak place at HS-DSCH, edge as NodeB, the MAC-hs PDU that HS-DSCH carried just probably can not carry a MAC-d PDU that will send because MAC-hs PDU length is too little, thereby just can not receive downlink data when causing UE to be in this position, and then cause wireless chain control layer (RLC) to reset and make the UE call drop.
The present invention is directed to above-mentioned situation, when MAC-hs PDU can not carry a MAC-dPDU that will send, after a MAC-d PDU that will send carries out segmentation, the MAC-dPDU of a plurality of segmentations is carried on respectively among a plurality of MAC-hs PDU in different TTI, sends successively, thereby guaranteed that Node B sends downlink data by HS-DSCH continuously to UE, safeguards the stability of HS-DSCH.
Fig. 3 is the method flow diagram of Node B of the present invention by HS-DSCH transmission MAC-hs PDU, and its concrete steps are:
UE among step 300, the Node B sends self detected CQI value to Node B.
Step 301, Node B find the MAC-hsPDU length of the CQI value correspondence of this UE according to CQI value and the current maximum transmission power that can distribute for this UE of this UE that receives in the CQI mapping table.
Step 302, Node B judge MAC-hs PDU can for the carrying MAC-d PDU length whether less than the length that will send MAC-d PDU to UE, if less than, then execution in step 304; Otherwise then execution in step 303.
When judging, in fact judge be MAC-hs PDU length whether less than the MAC-hs header length that will add to the length that UE sends MAC-d PDU among the MAC-hs PDU, promptly MAC-hsPDU can be that MAC-hs PDU length deducts the length that the MAC-hs header length among the MAC-hs PDU obtains for the MAC-d PDU length of carrying.
Step 303, Node B will be carried among the MAC-hs PDU to the MAC-d PDU that UE sends and send to UE by HS-DSCH, finish current handling process.
Step 304, Node B will be carried out segmentation according to MAC-hs PDU length to the MAC-d PDU that UE sends, and the MAC-d PDU of a plurality of segmentations is carried on respectively among a plurality of MAC-hs PDU that carry the branch segment identification, send to UE by HS-DSCH successively.
Carry the branch segment identification difference that the MAC-hs PDU of the MAC-d PDU of different segmentations carries: when first segmentation of carrying MAC-d PDU, the segmentation sign expression of carrying is the MAC-d PDU of first segmentation; When carrying a plurality of medial section of MAC-d PDU, the segmentation sign expression of carrying is the MAC-d PDU of medial section; When carrying last segmentation of MAC-d PDU, the segmentation sign expression of carrying is the MAC-d PDU of last segmentation.
The process of carrying out segmentation according to MAC-hs PDU length is: the MAC-hs header length that MAC-hs PDU length is deducted MAC-hs PDU obtains the length of the MAC-d PDU of segmentation, according to the length of the MAC-d PDU of the segmentation that obtains MAC-d PDU is carried out segmentation.
In the present invention, carry the one or more MAC-hs PDU of MAC-d PDU of one or more segmentations respectively by sending successively in the automatic repeat requests of existing same mixing (HARQ) process.
Fig. 4 is the method flow diagram of UE of the present invention by HS-DSCH reception MAC-hs PDU, and its concrete steps are:
Step 400, each TTI, UE receives MAC-hs PDU by HS-DSCH, judges whether received MAC-hs PDU carries the branch segment identification, if, execution in step 402; Otherwise, execution in step 401.
That step 401, UE determine MAC-hs PDU carrying is complete MAC-d PDU, and the complete MAC-d PDU that is carried is broken from MAC-hs PDU, obtains MAC-d PDU, finishes current handling process.
What step 402, UE determined MAC-hs PDU carrying is the MAC-d PDU of segmentation, received MAC-hs PDU is carried out buffer memory, up to buffer memory till the more than one MAC-hs PDU of MAC-d PDU of all segmentations of carrying MAC-d PDU, after the MAC-d PDU of the segmentation that the more than one MAC-hs PDU of buffer memory is successively carried respectively breaks from corresponding M AC-hs PDU, cascade successively again, obtain MAC-d PDU, finish current handling process.
The present invention carries out segmentation to MAC-d PDU and is meant whole M AC-d PDU is carried out segmentation, promptly the MAC-d header that contains and the whole M AC-d PDU of downlink data is carried out segmentation.
Fig. 5 is the structural representation of MAC-hs PDU of the present invention, the structural similarity of the MAC-hs PDU of the structure of MAC-hs PDU of the present invention and prior art, only in MAC-hs header, increased identification field a: I again, take 2 bit, be used to indicate transmission sequence number is whether the MAC-hsPDU of TSN is the MAC-hs PDU of segmentation.The concrete meaning of I value is as described below:
When the I value is " 00 ", identify MAC-d PDU that this MAC-hs PDU carried not by segmentation; When the I value is " 01 ", identify MAC-d PDU that this MAC-hs PDU carried by segmentation and what divided is first section; When the I value is " 10 ", identify MAC-d PDU that this MAC-hs PDU carried by segmentation and what divided is interlude; When the I value is " 11 ", identify MAC-d PDU that this MAC-hsPDU carries by segmentation and what divided is final stage.
As can be seen, when the I value is non-" 00 ", indicate that the MAC-dPDU that this MAC-hs PDU is carried has been the MAC-d PDU of segmentation.When MAC-hs PDU only carries the MAC-dPDU of a segmentation, as shown in Figure 6, Fig. 6 is the structure embodiment schematic diagram of MAC-hs PDU of the present invention: in MAC-hs header, because MAC-hs PDU only carries the MAC-d PDU of a segmentation, so have only the information of the MAC-d PDU of this segmentation, that is: the I value is non-" 00 "; VF represents version flag; Quene ID queue identity; TSN represents the transmission sequence number of the MAC-d PDU of this segmentation; SID represents the length call number of the MAC-hs SDU of segmentation; N represents the number of the MAC-hsSDU of same length, is " 1 ".MAC-hs SDU is the MAC-d PDU of segmentation, and the Padding field is filled insignificant character, till the length that reaches this MAC-hs PDU.
After the MAC-d PDU that MAC-hs PDU is carried carries out segmentation, Node B specifically how by HS-DSCH send the MAC-hs PDU of the MAC-d PDU that has carried segmentation and UE specifically how to receive the carrying of sending by HS-DSCH the MAC-hsPDU of MAC-d PDU of segmentation as described below.
Fig. 7 sends the specific embodiment flow chart of the MAC-hs PDU of the MAC-d PDU carried segmentation for Node B of the present invention by HS-DSCH, and its detailed process is:
UE among step 700, the Node B sends self detected CQI value to Node B.
The CQI value of this UE that step 701, Node B basis receive and the current maximum transmission power that can distribute for this UE find corresponding MAC-hs PDU length in the CQI mapping table.
Because Node B self stores the MAC-d PDU that will send successively and the segmentation of MAC-d PDU, be whether MAC-d PDU or the segmentation of MAC-d PDU just can judge will be to the complete MAC-dPDU of this UE transmission so the present invention will send according to Node B self storage current.
Under the MAC-d PDU situation of a segmentation of transmission, the MAC-hs header length of MAC-hs PDU is 22bit.Node B with the length that carry out segmentation will in this TTI the complete MAC-d PDU of this UE transmission is: MAC-hs PDU length-22bit, this section length is inserted the SID among the MAC-hs header of MAC-hs PDU with binary form, the I value is set for " 01 ", promptly the mark MAC-d PDU that is carried on the segmentation among the MAC-hs PDU also has subsequent segment.
The subsequent segment that step 705, Node B send MAC-d PDU will for this UE in this TTI is carried on the subsequent segment of MAC-d PDU among the MAC-hs PDU and sends to this UE by HS-DSCH.If the segmentation that this sent is not last segmentation of MAC-d PDU, then when next TTI, change step 700 over to, continue to send the subsequent segment of MAC-d PDU, up to all subsequent segment that send MAC-dPDU.
The maximum length of the subsequent segment of MAC-d PDU is: MAC-hs PDU length-22bit; Minimum length is the length of the MAC-d PDU of last segmentation own.
When the subsequent segment of MAC-d PDU is interlude, the I value is set is " 10 "; When the subsequent segment of MAC-d PDU is last segmentation of this MAC-d PDU, the I value is set is " 11 ".
Fig. 8 has received the carrying of sending by HS-DSCH for the UE of the present invention specific embodiment flow chart of MAC-hs PDU of MAC-dPDU of segmentation, its concrete steps are:
The MAC-d PDU that step 801, this UE will be carried on this MAC-hs PDU breaks, and obtains MAC-d PDU, finishes current handling process.
After step 802, this UE carry out buffer memory with this MAC-hs PDU, in the TTI afterwards, continuation is carried out buffer memory with the MAC-hs PDU that receives, in each TTI, judge whether buffer memory and carried a plurality of MAC-hs PDU of MAC-d PDU of all segmentations of MAC-d PDU respectively, if, execution in step 803; Otherwise, continue execution in step 802, till the MAC-hs of all segmentations that receive MAC-d PDU PDU.
If the I value among the MAC-hs header of this MAC-hs PDU is " 01 ", TSN is n, 0＜=n＜=63, then in the TTI afterwards, the MAC-hs PDU that receives is later carried out buffer memory, till receiving that the I value is first MAC-hs PDU of " 00 " or " 01 " for the MAC-hs PDU of " 11 " or I value.If receive such MAC-hs PDU, then show whole segmentations of having received this MAC-d PDU.The I value is that the TSN of first MAC-hs PDU of " 00 " or " 01 " is (n+m), gets the mould value of n+m, m＞=2.When (n+m)＞=64, TSN is (n+m) mod 64 so.
When m＞2, this UE judge respectively received TSN be n+1 ..., whether the I value of the MAC-hsPDU of n+m-2 all be " 10 ", and judge TSN is whether the I value of the MAC-hs PDU of n+m-1 is " 11 ", if two conditions all meet execution in step 804; If satisfied condition or two conditions do not satisfy execution in step 805.
When m=2, this UE judges received TSN is whether the I value of the MAC-hs PDU of n+m-1 is " 11 ", if, execution in step 804; Otherwise, execution in step 805.
After the MAC-d PDU of the segmentation that step 804, this UE are carried received a plurality of MAC-hs PDU respectively broke respectively from corresponding M AC-hs PDU, cascade again obtained complete MAC-d PDU, finishes current handling process.
This UE is cascade again after the MAC-dPDU of the segmentation of carrying breaks respectively among the MAC-hs PDU of n～n+m-1 with TSN, obtains complete MAC-d PDU.
It is the partition of a plurality of MAC-hs PDU of n～n+m-1 and follow-up cascade that this UE abandons TSN, and abandoning TSN is a plurality of MAC-hs PDU of n～n+m-1.
The described process of Fig. 8 is to be realized by assembling (De-assembly) entity of separating among the UE with MAC-hs function.
In the described method of Fig. 8, the present invention is provided with the TSN value among the MAC-hs header of MAC-hs PDU successively in order according to the MAC-hsPDU sending order of the MAC-d PDU of carrying segmentation.
In the present invention, after UE whenever receives the MAC-hs PDU of MAC-d PDU of a carrying segmentation, send for Node B and acknowledge receipt of message; Correspondingly, Node B only after the MAC-hs PDU of the MAC-d PDU that receives the last segmentation of carrying acknowledges receipt of message really, sends the MAC-hs PDU of the MAC-d PDU of carrying subsequent segment just can in next TTI UE again.If NodeB does not receive the MAC-hs PDU of the MAC-d PDU of the last segmentation of carrying that UE sends and acknowledges receipt of message really in the time of setting, then the MAC-hsPDU to the MAC-d PDU that carries last segmentation retransmits, behind the number of retransmissions that reaches setting, the MAC-hs PDU that Node B will carry the MAC-d PDU of last segmentation abandons, and the MAC-hs PDU of the MAC-d PDU of carrying subsequent segment also can be abandoned by Node B.
In the present invention, after Node B can not receive that also the MAC-hs PDU of the MAC-d PDU of the last segmentation of carrying acknowledges receipt of message really, will send the MAC-hs PDU of the MAC-dPDU of carrying subsequent segment to UE.
Whether what the present invention can increase in the MAC-hs of MAC-hs PDU header not only that the I territory identifies MAC-hs PDU carrying is the MAC-d PDU of segmentation, and whether what can increase segmentation mark for marking MAC-hs PDU carrying in the optional position of MAC-hs PDU is the MAC-dPDU of segmentation.In addition, the byte number of the branch segment identification of increase can not limit yet.
In order to reach purpose of the present invention, MAC-hs PDU provided by the invention only carries the MAC-d PDU of a segmentation, yet in realization, MAC-hs PDU provided by the invention can carry the MAC-d PDU of a plurality of segmentations.In this case, can in the MAC-hs of MAC-hs PDU header, increase the length of the MAC-d PDU that describes each segmentation of being carried and the territory of number, promptly increase by one or one group of above I, N, SID and F again.
By method provided by the invention, can guarantee when UE is in the relatively poor position of HS-DSCH environment, be in the edge of Node B as UE, still can receive the MAC-hs PDU of the MAC-d PDU that carry segmentation by HS-DSCH, avoided the risk of UE call drop.Because MAC-hs PDU of the present invention can carry the MAC-d PDU of segmentation, so just can when configuration MAC-d PDU,,, improve service quality to improve effective transmission rate of downlink data with the bigger value of length configuration of MAC-d PDU.Because MAC-hs PDU of the present invention can carry the MAC-d PDU of segmentation, so can not occur can't be by the situation of HS-DSCH transmitting downlink data, do not come transmitting downlink data and do not need in same Node B, to be provided with again DSCH, simplified the complexity of communication system planning, the coverage of HS-DSCH is increased.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1, the sending method of a kind of high speed medium cut-in control grouping data unit MAC-hs PDU is characterized in that, this method comprises:
A, the MAC-d PDU length of Gong carrying during that provides MAC-hs PDU for user equipment (UE) as sub-district Node B less than the length of the dedicated channel medium cut-in control grouping data unit MAC-d PDU that will send to UE, Node B carries out segmentation with described MAC-d PDU according to the length of MAC-hs PDU;
B, Node B are carried on one or more MAC-hs PDU respectively with the MAC-d PDU of one or more segmentations, send to UE by high speed downlink shared channel HS-DSCH successively.
2, the method for claim 1, it is characterized in that the described MAC-d PDU length of Gong the carrying of MAC-hsPDU that provides of steps A is: the length of the MAC-hs PDU that provides deducts the high speed media access control length that MAC-hs header length obtains of MAC-hs PDU.
3, the method for claim 1 is characterized in that, the described MAC-hs PDU of step B carries the branch segment identification.
4, method as claimed in claim 3 is characterized in that, the I territory is set in the MAC-hsheader of MAC-hs PDU, and described minute segment identification is arranged on the I territory among the MAC-hs header of MAC-hs PDU.
5, the method for claim 1 is characterized in that, has TSN among the MAC-hs header of the described MAC-hs PDU of step B, and this TSN adopts different sequence valves to identify the MAC-hs PDU of the MAC-d PDU of the different segmentations of having carried MAC-dPDU.
6, the method for claim 1 is characterized in that, the described process of carrying out segmentation of steps A is:
The length of MAC-hs PDU is deducted the length that MAC-hs header length obtains the MAC-dPDU of segmentation, MAC-d PDU is carried out segmentation according to the length of the MAC-d PDU of resulting segmentation.
7, the method for claim 1 is characterized in that, step B is described to carry the one or more MAC-hs PDU of MAC-d PDU of one or more segmentations respectively by sending successively in the automatic repeat requests HARQ process of same mixing.
8, the method for claim 1 is characterized in that, step B is described with one or more MAC-hs PDU by the process that HS-DSCH sends to UE to be successively:
Before sending a MAC-hs PDU in order, Node B judges whether to receive previous MAC-hs PDU and acknowledges receipt of message really, if then send a MAC-hs PDU in order again; Otherwise, retransmit previous MAC-hs PDU, behind the number of retransmissions that reaches setting, Node B abandons previous MAC-hs PDU and the follow-up MAC-hs PDU that does not also send.
9, the method for reseptance of a kind of MAC-hs PDU is characterized in that, this method comprises:
A1, in this Transmission Time Interval TTI, UE receives MAC-hs PDU by HS-DSCH, judges whether received MAC-hs PDU carries the branch segment identification, if not, execution in step B1; Otherwise, execution in step C1;
That B1, UE determine MAC-hs PDU carrying is complete MAC-d PDU, and the complete MAC-d PDU that is carried is broken from MAC-hs PDU, obtains MAC-d PDU;
What C1, UE determined MAC-hs PDU carrying is the MAC-d PDU of segmentation, received MAC-hs PDU is carried out buffer memory, in next TTI, change steps A 1 over to, up to buffer memory carry respectively till the more than one MAC-hs PDU of MAC-d PDU of all segmentations of MAC-d PDU;
D1, UE will be successively the MAC-d PDU of the more than one MAC-hs PDU of the buffer memory segmentation of carrying respectively from corresponding M AC-hs PDU, break after cascade successively again, obtain MAC-dPDU.
10, method as claimed in claim 9 is characterized in that, step C1 described up to buffer memory the deterministic process of carrying respectively till the more than one MAC-hsPDU of MAC-d PDU of all segmentations of MAC-d PDU be:
In each TTI, whether the MAC-d PDU that judges the segmentation that the MAC-hs PDU of institute's buffer memory is carried according to minute segment identification is the last segmentation of MAC-d PDU, if, the more than one MAC-hsPDU of MAC-d PDU of all segmentations of carrying MAC-d PDU that has been judged to be buffer memory; Otherwise, then in next TTI, continue the received MAC-hs PDU that carries the branch segment identification of buffer memory.
11, as claim 9 or 10 described methods, it is characterized in that, in the MAC-hs of MAC-hs PDU header the I territory is set, described minute segment identification is arranged on the I territory among the MAC-header of MAC-hs PDU.
12, method as claimed in claim 9, it is characterized in that, step D1 described will be successively the MAC-d PDU of the more than one MAC-hs PDU of the buffer memory segmentation of carrying respectively from corresponding M AC-hs PDU, break after more successively before the cascade, this method also comprises:
Node B be carried MAC-d PDU different segmentations MAC-d PDU MAC-hsPDU according to the segmentation order be provided with the order the TSN value, UE has judged whether buffer memory successively and has carried respectively from first of MAC-d PDU and be fragmented into all MAC-hsPDU with order TSN value of last segmentation, if, the step of cascade successively again after the MAC-d PDU that carries out the segmentation that the more than one MAC-hs PDU of buffer memory successively carries respectively breaks from corresponding M AC-hs PDU, otherwise, then abandon having carried respectively of institute's buffer memory and be fragmented into the MAC-hs PDU of last segmentation from first of MAC-d PDU.
13, method as claimed in claim 9 is characterized in that, step C1 is described received MAC-hs PDU is carried out buffer memory before, this method also comprises:
UE sends MAC-hs PDU to Node B and acknowledges receipt of message really.
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