CN103067142B - Radio communication device - Google Patents
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- CN103067142B CN103067142B CN201310026360.4A CN201310026360A CN103067142B CN 103067142 B CN103067142 B CN 103067142B CN 201310026360 A CN201310026360 A CN 201310026360A CN 103067142 B CN103067142 B CN 103067142B
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Abstract
The invention provides a kind of radio communication device, it uses additional data check digit to carry out the communication protocol of transceiving data, object is the throughput improving entire system, comprise: receive data judging portion, it is to the data received, use described data check position to carry out data check, decision data whether mistake; Reception result sending part, it, when result of determination is mistake, abandons data, the re-send request may of these data is sent to the other radio communication device of transmission source, when result of determination is for being not mistake, be the other radio communication device that the normal meaning sends to transmission source by data; Form detection unit, the form of its decision data is normal or incorrect, when being judged to be normal, data handover is given the process of regulation; And retransmission requesting section, it, when the form of data is judged as abnormal, abandons data, and request receiving result sending part carries out the re-send request may of these data.
Description
The application is the applying date is on October 3rd, 2007, and application number is 200780100941.0, and denomination of invention is the divisional application of the application for a patent for invention of " radio communication device, radio communication control apparatus, wireless communications method and wireless communication control method ".
Technical field
The present invention relates to the radio communication device using additional data check digit to carry out the communication protocol of transceiving data.
Background technology
In recent years, extensively adopt be called as 3G(3rdgeneration) the agreement (non-patent literature 1) of wireless communication system.
Also several developing stage are had in this 3G, except except the middle original 3G adopted such as FOMA, have also appeared adopt communication speed more high speed, the portable telephone of the agreement that is called as 3.5G or HSDPA, and then now also research be called as the agreement of Super3G or 3.9G.
Agreement in the wireless communication system of the group of this 3G is divided into multiple layer, and layer 1 is wherein the layer being called as physical layer, and this layer 1 is the part being responsible for actual communication.
Fig. 1 is the agreement pie graph of layer 2.
The layer 2 being positioned at the upper strata of layer 1 is by by MAC(MediumAccessControl, media interviews control), RLC(RadioLinkControl, wireless spread-spectrum technology), PDCP(PacketDateConvergenceProtocol, packet data convergence protocol) 3 sublayers forming form.
Herein, the block being configured in a processing capacity of a layer or a sublayer is called as entity (entity), PDCP entity and RLC entity correspond to each LCH(LogicalChannel: logic channel), only there is the number (in the example shown in Fig. 1 be this n of #1 ~ #n) of the LCH of use, and corresponding and carry out PDU(ProtocolDataUnit to 1 with 1 respectively) handing-over.Herein, in PDCP entity, at 3.9G(Super3G) in carry out the process of the secret grade of data, in RLC entity, carry out the process of the repeating transmission control of data etc.
And, MAC entity by the PDU sent by each LCH from each RLC entity comprehensively to 1 PDU and be sent to HARQ(HybridAutomaticRepeatreQuest), HARQ by TRCH(TransportChannel, transmission channel) send it to layer 1 as lower layer.
At receiver side, MAC entity is assigned to one or more PDU by from layer 1 by the PDU that TRCH sends, and split each PDU is sent to each RLC entity by each LCH.
In addition, layer 2 more upper in also there is layer 3, but eliminate owing to there is no direct relation herein diagram and explanation.
Herein, for each PDU, pass through 3GPP(3rdGenerationPartnersshipProject) have studied following form: not only can additional user data, the control information needed for entity of the other side side can also be added, carry out information exchange with the other side side.
Fig. 2 is the figure of an example of the data flow representing the PDU that addition of control information.
In RLC entity, the RLC-SDU(SourceDataUnit to receiving from the PDCP entity of identical LCH) additional header H, and as the PDU(RLC-PDU in rlc sublayer) be sent to MAC entity.In MAC entity, the RLC-PDU sent by RLC entity from multiple LCH is as the SDU(MAC-SDU in media access control sublayer) receive, and these multiple MAC-SDU are integrated, additional MAC control information further, further additional header H is used as 1 MAC-PDU and is sent to layer 1.In layer 1, the MAC-PDU sent from media access control sublayer with wireless transmission.
On the other hand, at receiver side, the MAC-PDU that layer 1 receives is sent in MAC entity, and the MAC-PDU of this reception is assigned to the MAC-SDU of each LCH and sends to the RLC entity of each LCH by MAC entity.
In addition; in this Fig. 2; although the description of the situation of normal transmitting-receiving; but forming the HARQ(of MAC entity with reference to Fig. 1) in; pass through CRC(CyclicRedundancyCheck; cyclic redundancy check (CRC)) carry out receiving normal or receiving abnormal verification, send ACK(Acknowledgment when normal (CRC-OK) to transmission source), when receiving abnormal (CRC-NG) by sending NACK(NegatieAcknowledgement) carry out re-send request may.
Fig. 3 is the figure of the data flow representing the loopback comprising ACK, NACK that receiver side HARQ carries out.
Herein, the HARQ of transmitter side sends control part and carries out work, and these 2 MAC-PDU of MAC-PDU#1 and MAC-PDU#2 are sent to receiver side.Receive this 2 MAC-PDU at receiver side, receive in control part the CRC check of carrying out each MAC-PDU that this receives at the HARQ of receiver side.The result of this CRC check, thinks that MAC-PDU#1 receives abnormal (CRC-NG), now send NACK to transmitter side, and the HARQ of transmitter side sends in control part, and when receiving NACK, the repeating transmission carrying out this identical MAC-PDU#1 controls.At transmitter side, management have sent the moment of MAC-PDU#1, can identify that this NACK is the NACK which MAC-PDU of request retransmits when receiving NACK from the time of reception of this NACK.Therefore, in the identifier of the MAC-PDU of the receiver side not transmission and reception exception of MAC-PDU, and by means of only transmission NACK, can know to there occurs in which MAC-PDU in the transmitter side of this MAC-PDU send abnormal.
About after MAC-PDU#1 from the MAC-PDU#2 that transmitter side sends, when receiving normal (CRC-OK), HARQ receives control part and this MAC-PDU#2 is sent to MAC-PDU determination processing unit, sends ACK to transmitter side simultaneously.Receive the transmitter side of this ACK, recognize and do not need the repeating transmission about MAC-PDU#2 to control, send the MAC-PDU(that next should send is MAC-PDU#n herein).
In MAC-PDU determination processing unit, judge to receive the MAC-PDU#2 of control part reception as being the PDU of normal format or the PDU of abnormal form from this HARQ.
Fig. 4 is the schematic diagram of the normal/abnormal determination processing of the form of the PDU represented in MAC-PDU determination processing unit.
As mentioned above, receive in control part at HARQ, send ACK when CRC check result is judged as and receives normal to transmitter side, this MAC-PDU is sent to MAC-PDU determination processing unit simultaneously.In MAC-PDU determination processing unit, when receiving control part from HARQ and receiving MAC-PDU, judge that the form of this MAC-PDU is normal or abnormal.
Following situation is such as exemplified as incorrect form.
(1) identifier of LCH is extraneous situation;
(2) head than regulation many (E(Extension in head) be masked as ON) situation;
(3) situation that the summation of the Length information in head is longer than the MAC-PDU received;
(4) identifier of MAC control information is extraneous situation;
(5) situation etc. that the identifier of MAC control information is different from Length.
In MAC-PDU determination processing unit, judge that this MAC-PDU is as normal format or incorrect form, be assigned to the MAC-SDU of each LCH when being normal format and send to the RLC entity (with reference to Fig. 2) of each LCH, but when being incorrect form, this MAC-PDU is dropped.Now, do not implement in MAC entity to retransmit control.As mentioned above, control, therefore when not receiving the RLC-PDU that this RLC entity should receive, from RLC solid generation re-send request may owing to not carrying out repeating transmission in RLC entity, but existence condition in the enforcement that the repeating transmission in RLC entity controls, can not implement to retransmit control immediately.
Then, as the technology associated with the present invention, illustrate and use multiple antenna to carry out the MIMO(Multiple-InputMaltiple-Output that communicates, multiple-input and multiple-output) summary.
Fig. 5 represents the block diagram adopting the dispensing device of MIMO and the summary of receiving system, and Fig. 6 is the figure of the data flow represented when adopting MIMO.
As shown in Figure 2, in the MAC-PDU generating process portion 11 of transmitter side, comprehensively from the RLC-PDU(MAC-SDU that each RLC receives) generate MAC-PDU.This MAC-PDU generates multiple according to the generation that should send data, but in this Fig. 5, Fig. 6, representatively illustrate these 2 MAC-PDU of MAC-PDU#1 and MAC-PDU#2.The MAC-PDU that MAC-PDU generating process portion 11 generates sends control part 12 through HARQ and is input to layer 1 transmission processing portion 13, distribute multiple (being set to 2 as an example herein) antenna 14a, 14b to each MAC-PDU, and share transmission by these 2 antennas 14a, 14b.
At receiver side, the MAC-PDU sent from 2 antennas 14a, 14b of transmitter side is received by 2 antennas 24a, 24b and sends to layer 1 reception processing unit 23.In Fig. 6, by dual-mode antenna to being called mimo antenna, and represent with & 1, & 2 according to often pair.
Receive control part 22 by the MAC-PDU that multiple antenna 24a, 24b receive according to HARQ by layer 1 reception processing unit 22 of receiver side carry out the transmission of CRC check and NACK, ACK and be sent to MAC-PDU determination processing unit 21, in MAC-PDU determination processing unit 21, judge the normal/incorrect of above-mentioned form, be assigned to the MAC-SDU of each LCH when normal format and send to each RLC entity.The MAC-PDU of incorrect form abandon by MAC-PDU determination processing unit 21.
As mentioned above, MIMO is the technology using multiple antenna to carry out parallel transmitting-receiving, can carry out broadband high-speed communication by using multiple antenna.
Non-patent literature 1:http: //www.3gpp.org/
When above-mentioned communication protocol, there is problem as described below: the form carrying out the MAC-PDU received in the MAC-PDU determination processing unit of receiver side is normal or abnormal judgement, and when for abnormal form, this MAC-PDU is dropped.Require that the repeating transmission in RLC entity controls to carry out the acquisition of the data that this abandons, but as mentioned above, the repeating transmission in RLC entity controls to implement immediately, to re-send request may, need the time, thus cause overall total throughout to reduce.
Summary of the invention
The object of the invention is to, a kind of radio communication device, radio communication control apparatus, wireless communications method and the wireless communication control method that realize total throughout and improve are provided in view of the above problems.
Realize the 1st radio communication device in the radio communication device of the present invention of above-mentioned purpose, this radio communication device uses additional data check digit to carry out the communication protocol of transceiving data, it is characterized in that, this radio communication device comprises: acceptance division, and it receives data from the other radio communication device of transmission source; Receive data judging portion, it is to the data received, and uses the data check position of these data to carry out data check, judges these data whether mistake; Reception result sending part, it, when result of determination is mistake, abandons data, the re-send request may of these data is sent to the other radio communication device of transmission source, when result of determination is for being not mistake, be the other radio communication device that the normal meaning sends to transmission source by data; Form detection unit, the form of its decision data is normal or incorrect, when being judged to be normal, data handover is given the process of regulation; And retransmission requesting section, it abandons this data when the form of data is judged as incorrect, requires that reception result sending part carries out the re-send request may of these data.
1st radio communication device of the present invention judges that the form of the data received is normal or incorrect; and have when being judged to be incorrect; abandon this data; the retransmission requesting section of above-mentioned reception result sending part carries out the re-send request may requirement of these data; therefore carry out re-send request may immediately when the form of data is incorrect, improve the throughput of communication.
Herein, the communication protocol of above-mentioned 1st radio communication device typically comprises MAC(MediumAccessControl) agreement, above-mentioned data check is CRC(CyclicRedundancyCheck), the process of afore mentioned rules is RLC(RadioLinkControl).
And, realize the 2nd radio communication device in the radio communication device of the present invention of above-mentioned purpose, this radio communication device uses additional data check digit to receive and dispatch the communication protocol of the data comprising communication control information, it is characterized in that, this radio communication device comprises: acceptance division, and it receives data from the other radio communication device of transmission source; Sending part, its other radio communication device to sending destination sends data; Receive data judging portion, it is to the data received, and uses the data check position of these data to carry out data check, decision data whether mistake; Reception result sending part, it, when result of determination is mistake, abandons data, the re-send request may of these data is sent to the other radio communication device of transmission source, when result of determination is for being not mistake, be the other radio communication device that the normal meaning sends to transmission source by data; Form detection unit, the form of its decision data is normal or incorrect, when being judged to be normal, data handover is given the process of regulation; And retransmission requesting section, it, when the form of data is judged as incorrect, abandons data, enrolls re-send request may and require that sending part carries out the transmission of data in the communication control information of data sending to the other radio communication device of transmission source.
The form of the 2nd radio communication device decision data of the present invention is normal or incorrect; and there is retransmission requesting section; for when the form of data is judged as incorrect; abandon this data; in the communication control information of data sending to this transmission source, enroll re-send request may and require the retransmission requesting section of sending part to carry out the transmission of these data; therefore carry out rapidly the re-send request may of data when the communication control information of data is incorrect, improve the throughput of communication.
Herein, in above-mentioned 2nd radio communication device, retransmission requesting section preferably enroll in the communication control information of data sending to the other radio communication device of transmission source comprise the data received the time of reception information re-send request may carry out the transmission that requirement sending part carries out data.
The delivery time sending data to the transmission source of sending incorrect data is not uniformly determined, therefore by enrolling the information time of reception comprising incorrect data in the communication control information of data that will send to this transmission source, this incorrect data can easily be determined in the transmission source of sending incorrect data.
And, above-mentioned 2nd radio communication device preferably also has multiple antenna, the plurality of antenna is used to carry out MIMO(Multiple-InputMultiple-Output) communication, retransmission requesting section enrolls the re-send request may that the information time of reception not only comprising the data received also comprises antenna identifying information in the communication control information of data sending to the other radio communication device of transmission source, requires that sending part carries out the transmission of data.
When adopting the radio communication device of MIMO technology, multiple antenna is used to carry out radio communication concurrently, therefore by being programmed into communication control information by not only comprising the re-send request may that above-mentioned time of reception, information also comprised the antenna identifying information of the antenna determining to receive incorrect data, in the transmission source sending this incorrect data, by these of information and antenna identifying information, can easily determine the incorrect data of this transmission time of reception.
The communication protocol of the 2nd radio communication device typically comprises MAC(MediumAccessControl) agreement, above-mentioned data check is CRC(CyclicRedundancyCheck), above-mentioned communication control information is MAC control information, and the process of afore mentioned rules is RLC(RadioLinkControl).
Further, above-mentioned 1st radio communication device and the 2nd radio communication device any one in, preferred above-mentioned retransmission requesting section when retransmitting the communication control information comprised in the data come and being identical content incorrect, the no longer re-send request may of these data.
When retransmit in the data come comprise identical incorrect time, can not eliminate in transmission source that this is incorrect, even if carry out re-send request may again, the possibility eliminating these incorrect data can be obtained also very low, only cause increasing the traffic, therefore preferably no longer carry out re-send request may.
And, realize the 1st radio communication control apparatus in the radio communication control apparatus of the present invention of above-mentioned purpose, this radio communication control apparatus is used for radio communication device and controls communication, this radio communication device uses additional data check digit to carry out the communication protocol of transceiving data, and there is acceptance division and reception result sending part, the feature of the 1st radio communication control apparatus is, this radio communication control apparatus comprises: receive data judging portion, it is to the data received, use the data check position of these data to carry out data check, judge these data whether mistake; Reception result sends instruction unit, it is when result of determination is mistake, abandon data, instruction reception result sending part, it is made re-send request may of these data to be sent to the other radio communication device of transmission source, when result of determination is for being not mistake, instruction reception result sending part, makes it be the other radio communication device that the normal meaning sends to transmission source by these data; Form detection unit, the form of its decision data is normal or incorrect, when being judged to be normal, data handover is given the process of regulation; And retransmission requesting section, it abandons this data when the form of data is judged as incorrect, requires that reception result sending part carries out the re-send request may of these data.
And, realize the 2nd radio communication control apparatus in the radio communication control apparatus of the present invention of above-mentioned purpose, this radio communication control apparatus is used for radio communication device and controls communication, this radio communication device uses additional data check digit to receive and dispatch the communication protocol of the data comprising communication control information, and there is acceptance division and sending part and reception result sending part, the feature of the 2nd radio communication control apparatus is, this radio communication control apparatus comprises: receive data judging portion, it is to the data received, use the data check position of these data to carry out data check, judge these data whether mistake, reception result sends instruction unit, it is when result of determination is mistake, abandon data, instruction reception result sending part, it is made re-send request may of these data to be sent to the other radio communication device of transmission source, when result of determination is for being not mistake, instruction reception result sending part, makes it be the other radio communication device that the normal meaning sends to transmission source by these data, form detection unit, the form of its decision data is normal or incorrect, when being judged to be normal, data handover is given the process of regulation, and retransmission requesting section, it abandons this data when the form of data is judged as incorrect, requires to send in the communication control information of the data of the other radio communication device of transmission source at this sending part to enroll re-send request may.
And, realize the 1st wireless communications method in the wireless communications method of the present invention of above-mentioned purpose, this wireless communications method employs radio communication device, this radio communication device comprises acceptance division, receives data judging portion, reception result sending part, form detection unit and retransmission requesting section, and use additional data check digit to carry out the communication protocol of transceiving data, the feature of this wireless communications method is, this wireless communications method comprises: receiving step, use acceptance division, receive data from the other radio communication device of transmission source; Receive data judging step, use and receive data judging portion, to the data received, use the data check position of these data to carry out data check, decision data whether mistake; Reception result forwarding step, uses reception result sending part, when result of determination is mistake, abandon data, the re-send request may of these data being sent to the radio communication device of transmission source, when result of determination is for being not mistake, is the radio communication device that the normal meaning sends to transmission source by data; Format deciding step, using form detection unit, the form of decision data is normal or incorrect, when being judged to be normal, data handover is given the process of regulation; And retransmission requesting step, use retransmission requesting section, when the form of data is judged as incorrect, abandon this data, require that reception result sending part carries out the re-send request may of these data.
And, realize the 2nd wireless communications method in the wireless communications method of the present invention of above-mentioned purpose, this wireless communications method employs radio communication device, this radio communication device comprises acceptance division, sending part, receive data judging portion, reception result sending part, form detection unit and retransmission requesting section, and use additional data check digit to receive and dispatch the communication protocol of the data comprising communication control information, the feature of this wireless communications method is, this wireless communications method comprises: receiving step, use acceptance division, data are received from the other radio communication device of transmission source, receive data judging step, use and receive data judging portion, to the data received, use the data check position of these data to carry out data check, judge these data whether mistake, reception result forwarding step, use reception result sending part, when result of determination is mistake, abandon data, the re-send request may of these data is sent to the other radio communication device of transmission source, when result of determination is for being not mistake, be the radio communication device that the normal meaning sends to transmission source by data, format deciding step, using form detection unit, the form of decision data is normal or incorrect, when being judged to be normal, data handover is given the process of regulation, retransmission requesting step, uses retransmission requesting section, when the form of data is judged as incorrect, abandons data, in the communication control information of data sending to the radio communication device of transmission source, enroll re-send request may, require that sending part carries out the transmission of these data, and use sending part to send the step with the data of the communication control information having enrolled re-send request may to the radio communication device of transmission source.
And, realize the 1st wireless communication control method in the wireless communication control method of the present invention of above-mentioned purpose, this wireless communication control method employs for radio communication device and controls the radio communication control apparatus of communication, this radio communication device uses additional data check digit to carry out the communication protocol of transceiving data, and there is acceptance division and reception result sending part, the feature of this wireless communication control method is, this wireless communication control method comprises: receive data judging step, to the described data received, use the data check position of these data to carry out data check, decision data whether mistake, reception result sends instruction step, when result of determination is mistake, abandon data, instruction reception result sending part, it is made re-send request may of these data to be sent to the other radio communication device of transmission source, when result of determination is for being not mistake, instruction reception result sending part, makes it be the other radio communication device that the normal meaning sends to transmission source by data, format deciding step, the form of decision data is normal or incorrect, when being judged to be normal, data handover is given the process of regulation, and retransmission requesting step, when the form of data is judged as incorrect, abandon data, require that reception result sending part carries out the re-send request may of these data.
And, realize the 2nd wireless communication control method in the wireless communication control method of the present invention of above-mentioned purpose, this wireless communication control method employs for radio communication device and controls the radio communication control apparatus of communication, this radio communication device uses additional data check digit to receive and dispatch the communication protocol of the data comprising communication control information, and there is acceptance division and sending part and reception result sending part, the feature of this wireless communication control method is, this wireless communication control method comprises: receive data judging step, to the data received, use the data check position of these data to carry out data check, decision data whether mistake, reception result sends instruction step, when result of determination is mistake, abandon data, instruction reception result sending part, it is made re-send request may of these data to be sent to the other radio communication device of transmission source, when result of determination is for being not mistake, instruction reception result sending part, makes it be the other radio communication device that the normal meaning sends to transmission source by data, format deciding step, the form of decision data is normal also incorrect, when being judged to be normal, data handover is given the process of regulation, and retransmission requesting step, use retransmission requesting section, when the form of data is judged as incorrect, abandon data, require to send in the communication control information of the data of the radio communication device of transmission source at sending part to enroll re-send request may.
Herein, about radio communication control apparatus, wireless communication control method and wireless communication control method, describe main form, but for radio communication control apparatus of the present invention, wireless communication control method and wireless communication control method, as long as its character is constant, then comprise the form of ownership corresponding with the form recorded the radio communication device of the invention described above.
Accompanying drawing explanation
Fig. 1 is the agreement pie graph of layer 2.
Fig. 2 is the figure of an example of the data flow representing the PDU that addition of control information.
Fig. 3 is the figure of the data flow of the loopback representing ACK, NACK of comprising receiver side HARQ.
Fig. 4 is the schematic diagram of the normal/abnormal determination processing of the form of the PDU represented in MAC-PDU determination processing unit.
Fig. 5 represents the block diagram that have employed the dispensing device of MIMO and the summary of receiving system.
Fig. 6 is the figure of the data flow represented when have employed MIMO.
Fig. 7 is the schematic diagram of the example representing the communication system applying one embodiment of the present invention.
Fig. 8 represents that the HARQ in the 1st execution mode of the present invention receives the block diagram of control part and MAC-PDU determination processing unit.
Fig. 9 is the figure of the data flow represented in the execution mode shown in Fig. 8.
Figure 10 be represent in the 2nd execution mode of the present invention, the block diagram of structure in the media access control sublayer of receiver side.
Figure 11 is the figure of the data flow represented in the execution mode shown in Figure 10.
Embodiment
Below embodiments of the present invention are described.
Fig. 7 is the schematic diagram of the example representing the communication system applying one embodiment of the present invention.
In this Fig. 7, indicate portable telephone 100 and and this portable telephone 100 between carry out the base station 200 of radio communication.In addition, in actual communication system, there is multiple portable telephone and multiple base station, also there are multiple switches etc., but herein, illustrate only the structure of the irreducible minimum illustrated needed for present embodiment.
Between portable telephone 100 and base station 200, carry out radio communication, when portable telephone 100 becomes transmitter side, base station 200 becomes receiver side, and when base station 200 becomes transmitter side, portable telephone 100 becomes receiver side.Namely, portable telephone 100 and base station 200 all have the structure of transmitter side and the structure of receiver side of following explanation.
In above-mentioned prior art, this MAC-PDU is abandoned when existing incorrect in the form of received MAC-PDU, re-send request may is required to RLC, but in present embodiment, when existing incorrect in the form of this MAC-PDU, 2 examples illustrated as following, make to carry out re-send request may on the mac sublayer, improve the throughput of communication thus.Be only that re-send request may this point on media access control sublayer is different from above-mentioned prior art, other points directly refer to above-mentioned explanation of the prior art.
Namely, about the structure of block diagram of radio communication device of the present invention, comprise the structure of the transmitter side shown in above-mentioned Fig. 5 and receiver side both sides as an example, and be only the point of following explanation with difference in above-mentioned prior art.
Fig. 8 represents that the HARQ in the 1st execution mode of the present invention receives the block diagram of control part and MAC-PDU determination processing unit.
When receiving the MAC-PDU sent from transmitter side, receive in the reception data judging portion 221 of control part 22 at the HARQ of receiver side, CRC check is carried out to received MAC-PDU, when being normal reception (CRC-OK), this MAC-PDU is sent to MAC-PDU determination processing unit 21, meanwhile, in ACK/NACK sending part 222, generate ACK send request, carry out from the transmission of ACK/NACK sending part 222 via the ACK of layer 1.Wherein, even if generate sending request of ACK from reception data judging portion 221 to ACK/NACK sending part 222, as described below, ACK/NACK sending part 222 does not carry out the transmission of ACK sometimes, and sends NACK.
When being judged to receive abnormal (CRC-NG) by reception data judging portion 221, from reception, data judging portion 221 generates sending request of NACK to ACK/NACK sending part 222, and sends NACK by layer 1 to transmitter side from ACK/NACK sending part 222.At the delivery time of transmitter side managing MAC-PDU, and mainly describe when receiving ACK/NACK, can be ACK/NACK to which PDU according to identifying time of reception of ACK/NACK, when when MIMO, also still ACK/NACK is sent from the antenna identical with the antenna that receiver side receives, therefore at the transmitter side of PDU, can be ACK/NACK to which MAC-PDU according to delivery time and the antenna identification carrying out receiving.
Herein, be judged to be normal reception (CRC-OK) and the MAC-PDU that sends to MAC-PDU determination processing unit 21 receiving in data judging portion 221, this time in this MAC-PDU determination processing unit 21, be determined the PDU of normal format or the PDU of incorrect form, when being the PDU of normal format, being assigned to the SDU of each LCH and sending to the RLC entity (with reference to Fig. 2) of each LCH.
On the other hand, when being judged to be the PDU of incorrect form in MAC-PDU determination processing unit 21, this PDU is abandoned.Identical with above-mentioned prior art herein, but in the present embodiment, when MAC-PDU determination processing unit 21 is judged to be the PDU of incorrect form, abandoning this PDU, the ACK/NACK sending part 222 simultaneously receiving control part 22 to HARQ asks the transmission of NACK, and rewrites from receiving sending request of the ACK that brings in data judging portion 221 ACK/NACK sending part 222.Thus ACK/NACK sending part 222 receives the request from MAC-PDU determination processing unit 21, send NACK via layer 1 to transmitter side.
Fig. 9 is the figure of the data flow represented in the execution mode shown in Fig. 8.
In the example represented, using base station as transmitter side herein, be sent in these 2 MAC-PDU of MAC-PDU#1 and MAC-PDU#2 representatively herein from this transmitter side, received by the portable telephone as receiver side.At receiver side, is more specifically judge it is normal reception (CRC-OK) or abnormal reception (CRC-NG) in media access control sublayer in layer 2.
, first this judgement is carried out to MAC-PDU#1 herein, owing to being normal reception (CRC-OK), therefore first will send ACK to transmitter side herein.Wherein, ACK is not yet sent out, and during this period, judges that the form of this MAC-PDU#1 is normal or incorrect; when the form of this MAC-PDU#1 is incorrect, the ACK that will send owing to being normal reception (CRC-OK) is rewritten as NACK and sends to transmitter side.Therefore at transmitter side, just retransmit to receiver side the MAC-PDU#1 corresponding to this NACK upon receiving the nacks.
About MAC-PDU#2, due to receive also normal, form is also normal, therefore send ACK to transmitter side, at transmitter side, this MAC-PDU#2 do not retransmitted, and the MAC-PDU#n do not sent.
Thus, be not only when receiving abnormal (CRC-NG), even when receiving normal (CRC-OK), its PDU is the PDU of incorrect form, also still in media access control sublayer, re-send request may is carried out, do not wait for re-send request may from rlc sublayer and carry out re-send request may, therefore the time till shortening re-send request may, improve the throughput of entire system.
In addition, herein using base station as transmitter side, portable telephone is illustrated as receiver side, but portable telephone be transmitter side, base station is that the situation of receiver side is also identical.
In the layer 1 of transmitter side, the MAC-PDU that temporary transient preservation first sends, when receiving the NACK to the MAC-PDU that this first sends, retransmits the MAC-PDU of this preservation.Therefore, when the 1st execution mode, for comprise transmitter side layer 1, be the MAC-PDU determination processing of receiver side relative to this layer 1 before the mistake that is mixed into be effective, but to the process generating MAC-PDU at transmitter side, maybe the MAC-PDU of this generation is sent to transmitter side layer 1 process in MAC-PDU, be mixed into mistake time, no matter retransmit how many times also of no avail.Therefore, in receiver side MAC-PDU determination processing, when the form retransmitting the MAC-PDU come by sending NACK is the incorrect form identical with the form of the MAC-PDU before repeating transmission, no longer carry out re-send request may.Thus, repeating transmission for no reason can not be repeated and the resource of communication is supplied to other PDU.
Then, the 2nd execution mode of the present invention is described.
Figure 10 be represent in the 2nd execution mode of the present invention, the block diagram of structure in the media access control sublayer of receiver side.
The HARQ of receiver side (being set to portable telephone herein) receives in control part 22, as described above, CRC check is carried out to received MAC-PDU, and receives (CRC-OK) according to normal or receive abnormal (CRC-NG), ACK or NACK is sent to transmitter side (base station) respectively.ACK/NACK is now according to normal reception (CRC-OK) or receiving abnormal (CRC-NG) sends, and does not consider the normal/incorrect of form.
When HARQ reception control part 22 is judged to be normal reception (CRC-OK), this MAC-PDU is sent to MAC-PDU determination processing unit 21.Now, from HARQ receive control part 22 by represent receive this MAC-PDU moment time information, when utilizing MIMO be with comprise identify the mimo antenna information of carrying out the antenna received reception information together with send to MAC-PDU determination processing unit 21.In MAC-PDU determination processing unit 21, investigate the form of the MAC-PDU of this reception, and judge it is normal format or incorrect form.When being normal format, this MAC-PDU is decomposed into the MAC-SDU=RLC-PDU of each LCH, and sends to the RLC entity of each LCH.
On the other hand, when MAC-PDU determination processing unit 21 is judged to be incorrect form, abandon the MAC-PDU that this is judged to be incorrect form, the re-send request may with reception information (time information and mimo antenna information) is sent to MAC control information and is made handling part 31.Do not express in Figure 5 although this MAC control information makes handling part 31, being responsible for the making of the MAC control information of the MAC-PDU sent to base station from portable telephone, is the structural element in media access control sublayer.
Herein, can according to each moment need make various MAC control information, but as the feature of present embodiment, make the MAC control information making in handling part 31 and embedded in the re-send request may received from MAC-PDU determination processing unit 21 in this MAC control information.Include reception information (time information and mimo antenna information) being embedded in the re-send request may in this MAC control information.This MAC control information makes the MAC control information of handling part 31 generation by the MAC-PDU generating process portion 11 sent in same portable telephone.In MAC-PDU generating process portion 11, the RLC-PDU(MAC-SDU to receiving from RLC entity) carry out comprehensive, also generate simultaneously from MAC control information make MAC control information that handling part 31 receives or, generate the MAC-PDU that addition of head further.The MAC-PDU that this MAC-PDU generating process portion 11 generates is sent to HARQ and is sent control part 12, and then sends to base station via the layer 1 of this portable telephone.In the control information of base station side with reference to the MAC-PDU received, identify the situation having re-send request may in this control information, and then identify the MAC-PDU that should retransmit by the reception information (time information and mimo antenna information) attached by this re-send request may, and retransmit this MAC-PDU.Now, in base station side, be not saved to the MAC-PDU received before ACK/NACK, again received the RLC-PDU(MAC-SDU building and should retransmit needed for MAC-PDU from the RLC of each LCH of this base station side), and regenerate this MAC-PDU and retransmit.
Therefore, when the 2nd execution mode, to generate transmitter side MAC-PDU process, maybe the MAC-PDU of this generation to be sent to the possibility that the mistake that is mixed in the process of the layer 1 of this transmitter side also can save high.Even but in this situation, when retransmitting the MAC-PDU come and being the incorrect form identical with the MAC-PDU before repeating transmission, preferably no longer carry out re-send request may.
Figure 11 is the figure of the data flow represented in the execution mode shown in Figure 10.
Herein, these 2 MAC-PDU of MAC-PDU#D1 and MAC-PDU#D2 are sent to the portable telephone as receiver side situation from the base station as transmitter side is representatively illustrated.In the media access control sublayer of receiver side, carry out the transmission of CRC check, ACK/NACK, but herein about this point, due to identical with prior art (with reference to Fig. 3), omit diagram at this.
In the media access control sublayer of receiver side, when after CRC check being normal reception (CRC-OK), then investigating the form of the MAC-PDU of this reception, judge that this form is normal or incorrect.When being judged to be normal, identical with the situation of prior art or above-mentioned 1st execution mode.
On the other hand, when the MAC-PDU that this receives is judged as the PDU of incorrect form, abandon this MAC-PDU, and embed the re-send request may that addition of reception information in the MAC control information of the MAC-PDU this time formed when this identical portable telephone becomes transmitter side, and the MAC-PDU#U1 in this MAC-PDU(Figure 11) sent by base station, wherein, this reception packets of information receives the time information in moment of MAC-PDU of incorrect form and the mimo antenna information for determining the antenna receiving this MAC-PDU containing representing.
In a base station, the MAC control information of this MAC-PDU#U1 received is analyzed, and recognizes reply MAC-PDU#D1 and retransmit, and is retransmitted to portable telephone by after this MAC-PDU#D1 regeneration.
When the 2nd execution mode, when incorrect form, also still in media access control sublayer, carry out re-send request may, improve the throughput of entire system.
Claims (2)
1. a radio communication device, this radio communication device uses the communication protocol of receiving and dispatching MAC-PDU with check digit, and wherein, this MAC is MediumAccessControl, and namely media interviews control, and this PDU is ProtocolDataUnit, i.e. protocol Data Unit,
The feature of this radio communication device is,
Described radio communication device comprises:
Acceptance division, it receives described MAC-PDU from other radio communication device;
1st detection unit, it is to the described MAC-PDU received, and uses described check digit to carry out data check, judges described MAC-PDU whether as mistake;
2nd detection unit, it is when described 1st detection unit is judged to be that described MAC-PDU is normal, judge that whether the identifier of the MAC control information in described MAC-PDU is as outside scope, when the identifier of the described MAC control information in described MAC-PDU is judged as outside scope, abandon described MAC-PDU;
1st sending part, it is when the described result judged is as mistake, sends and represents that described MAC-PDU is the 1st message of mistake, when the result of described judgement is not mistake, sends and represents that described MAC-PDU is normal 2nd message; And
2nd sending part, its described 1st detection unit be judged to be the identifier of the described MAC control information that normal but described 2nd detection unit of described MAC-PDU is judged to be in described MAC-PDU be in scope outer time, send and represent that described MAC-PDU is normal but the identifier of described MAC control information in described MAC-PDU is in extraneous 3rd message.
2. radio communication device according to claim 1, is characterized in that,
The described communication protocol of described radio communication device comprises MAC protocol, and described data check is CRC and cyclic redundancy check (CRC).
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