CN1949698A - Automatic retransmission method, transmitter and receiver for use in LTE technology - Google Patents

Abstract

The invention discloses an automatic retransmitting method in LTE (long-term evolution) technique, applied between base staion NodeB and terminal UE, where NodeB and UE respectively act as transmitting and receiving ends or receiving and transmitting ends and the method comprises: the transmitting end receives data from upper layer and sends the data to the preset retransmit buffer memory and the receiving end; the receiving end receives the data and returns data receiving status information to the transmitting end; the transmitting end receives the data receiving status information and then determines whether to need to retransmit the data: if yes, retransmitting the corresponding data in the buffer memory. And the invention discloses two transmitters and two receivers. And it largely reduce data retransmitting delay at RLC layer in the original protocol and reduces burden on the upper layer devices of NodeB and increases their processing speeds.

Description

Automatic retransmission method in the LTE technology, transmitting apparatus and receiving equipment

Technical field

The present invention relates to the professional transmission technique field of wireless communication system, be meant a kind of long term evolution (Long Term Evolution, LTE) automatic retransmission method in the technology, two kinds of transmitting apparatus and two kinds of receiving equipments especially.

Background technology

Comprise in the LTE technology that the high-speed down data bag inserts (HSDPA) technology and the high speed uplink packet inserts (HSUPA) technology.In HSDPA and these two kinds of technology of HSUPA, rapid mixing by physical layer retransmits (HARQ) technology automatically, after mistake appearred in transfer of data, transmit leg retransmitted the data that mistake occurs or lose by the automatic retransmission mechanism of physical layer, thereby had reduced the probability of high-rise re-transmission.In addition, because being responsible for the entity of HARQ technology, global system for mobile communications land radio access web (UTRAN) side is arranged in base station (NodeB), so physical layer retransmission is carried out between NodeB and terminal (UE), therefore reduce the time delay of data re-transmission with respect to original high-rise retransmission technique, increased the speed of transfer of data.

But, in the HARQ technology, after number of retransmissions reaches predefined maximum retransmission,, also can stop the automatic re-transmission of physical layer even physical layer does not still correctly receive data.The data transmission fault of the affirmation pattern (AM) of Chu Xianing is retransmitted by high level usually in this case, retransmits as rlc layer and corrects.

In addition, in the system that does not introduce the HARQ technology, directly guarantee the correct transmission of data by the re-transmission of Radio Link control (RLC) layer.In the prior art, the rlc layer of URTAN side is arranged in radio network controller (RNC), referring to protocol stack in the 3GPP agreement R6 version shown in Figure 1.

Retransmitting with the RLC on the down direction below is the retransmission processes of rlc layer in the example explanation prior art.

In the UTRAN side, transfer of data is behind the rlc layer of RNC, rlc layer is cut apart cascade to the wireless link control layer service data cell (RLC SDU) from high level, promptly through over-segmentation or merge to generate the protocol Data Unit (AMD PDU) of equal-sized affirmation mode, the AMD PDU that to cut apart then behind the cascade sends to the re-transmission buffer memory that is provided with among the RNC, transmits to lower floor simultaneously.Wherein, the size of AMD PDU is determined by parameter A MD RLC size.

In the UE side, the media interviews of UE control (MAC) layer receives MAC PDU, obtains the PDU of rlc layer after removing the data head of MAC layer, and the PDU that obtains is sent to the rlc layer of UE.The PDU that the rlc layer of UE has been confirmed correctly to receive according to the sequence number (SN) of AMD PDU and do not have the correct PDU that receives, and the PDU information that will correctly receive and the PDU information that not have a correct reception send to rlc layer among the RNC by status PDU.

Rlc layer among the RNC is after the status PDU that the rlc layer that receives UE returns, delete the AMD PDU that UE has correctly received in the re-transmission buffer memory of RNC according to this status PDU and retransmit and retransmit that UE not have the correct AMD PDU that receives to give the base station in the buffer memory, and the physical channel by the base station carries and sends to UE.

By description that rlc layer in the above-mentioned prior art is retransmitted as can be seen, existing rlc layer retransmits and carries out between RNC and UE, in retransmission processes, not only need the processing procedure of RNC, also need the process that NodeB handles, and relating to transfer of data between RNC and the NodeB, the time delay that causes rlc layer to retransmit is bigger.

In addition, because retransmitting buffer memory is arranged among the RNC, because the UE quantity that each RNC was responsible for is very huge, needed re-transmission buffer memory is also very huge, especially when carrying high-speed data service stream, be easy to cause the cache resources anxiety of RNC, increased the burden of RNC, and reduced the throughput of RNC.

Summary of the invention

In view of this, main purpose of the present invention is to provide the automatic retransmission method in a kind of LTE technology, two kinds of transmitting apparatus and two kinds of receiving equipments, can reduce automatic retransmission delay time, and alleviate the burden of upper layer device, increases the throughput of upper layer device.

Be first aspect that achieves the above object, the invention provides the automatic retransmission method in a kind of LTE technology, this method is applied between base station node B and the terminal UE, and NodeB and UE as transmitting terminal and receiving terminal or receiving terminal and transmitting terminal, may further comprise the steps respectively:

A, transmitting terminal receive the data from the upper strata, and the data that receive are sent in the re-transmission buffer memory that sets in advance buffer memory and send to receiving terminal;

B, receiving terminal receive described data, and to transmitting terminal return data receiving status information;

After C, transmitting terminal receive described data receiving status information, determine whether that according to this data receiving status information needs retransmit, retransmit the corresponding data that then resends in the described re-transmission buffer memory if desired.

Described data from the upper strata are Service Data Unit SDU; Described data with reception may further include before being sent to the re-transmission buffer memory that sets in advance: the data that received are cut apart cascade; Among the then described step B, further comprise after transmitting terminal return data receiving status information: receiving terminal is recombinated to the data of correct reception and is generated SDU.

Described data from the upper strata are SDU; The described data that received are sent to may further include before the receiving terminal: the data that received are cut apart cascade; Among the then described step B, before transmitting terminal return data receiving status information, further comprise:

Receiving terminal is recombinated to the data that receive, and according to reorganization successful specified data accepting state whether.

Preferably, described data receiving status information is by status protocol data cell PDU or incidentally information PDU carrying.

Preferably, transmitting terminal does not have the correct data message that receives to determine that needs retransmit according to the receiving terminal in the data receiving status information among the step C.

Preferably, further comprise in the described data receiving status information: the correct data message that receives of receiving terminal;

Among the described step C, transmitting terminal further comprises after receiving described data receiving status information:

Transmitting terminal is according to the corresponding data in the correct data message deletion re-transmission buffer memory that receives of receiving terminal in the data receiving status information.

Preferably, among the described step B receiving terminal according to the sequence number of received data to transmitting terminal return data receiving status information.

Preferably, among the described step C, transmitting terminal further comprises after determining and needing to retransmit:

When transmitting terminal has reached predefined maximum retransmission at the number of retransmissions of determining the data that need re-transmission, delete the described data that need re-transmission.

Preferably, described maximum retransmission is provided with by the radio resource controller RRC in the transmitting terminal.

Preferably, described cut apart cascade, reorganization and retransmit relevant treatment automatically realize by Radio Link control rlc layer;

Sending the data to receiving terminal in the then described steps A is:

Rlc layer in the transmitting terminal is with media interviews control MAC layer, physical layer and the physical layer of receiving terminal and the rlc layer that MAC layer send to receiving terminal of data by transmitting terminal;

Described step B is specifically carried out by the rlc layer of receiving terminal.

Preferably, described cut apart cascade, reorganization and retransmit relevant treatment automatically realize by the MAC+ layer, also comprise the MAC layer in this MAC+ layer;

Then sending the data to receiving terminal described in the steps A is:

MAC+ layer in the transmitting terminal generates transmission block according to described data, and after carrying out the HARQ processing, the transmission block that generates is sent to the MAC+ layer of receiving terminal by the physical layer of transmitting terminal and receiving terminal;

Described step B is specifically carried out by the MAC+ layer of receiving terminal.

Preferably, sending the data to receiving terminal described in the steps A is:

After data are formed transmission block, carry out the HARQ retransmission process, send to receiving terminal then.

Preferably, the described level of cutting apart is linked as: SDU is cut apart level be linked to be equal-sized PDU, or according to the physical layer information of eating dishes without rice or wine SDU is cut apart level and be linked to be the PDU that is fit to eat dishes without rice or wine to transmit size.

Preferably, the described physical layer information of eating dishes without rice or wine is the transmission block size of eating dishes without rice or wine to allow.

Preferably, described transmission block size of eating dishes without rice or wine to allow is disposed by RRC.

Second aspect for achieving the above object the invention provides a kind of transmitting apparatus, comprise in this transmitting apparatus the MAC layer and,

Retransmit buffer memory, be used for buffer memory and retransmit related data;

Rlc layer is used to receive the SDU from the upper strata, and the SDU that receives is cut apart cascade, and the data that will cut apart cascade are sent in the described re-transmission buffer memory, maybe the SDU that receives is sent in the described re-transmission buffer memory, and cuts apart cascade; Send to described MAC layer with the data that will cut apart cascade; And receiving equipment does not have the correct data message that receives again the corresponding data in the described re-transmission buffer memory to be sent to described MAC layer in the data receiving status information that returns according to receiving equipment.

Preferably, comprise in the described rlc layer:

Cut apart the cascade function entity, be used to receive SDU, and after the SDU that receives cut apart cascade, the data that will cut apart cascade sent to automatic functions of retransmission entity from the upper strata; Or receive SDU, and after the SDU that receives cut apart cascade, send to the MAC layer from automatic functions of retransmission entity;

Automatic functions of retransmission entity, being used for will be from cutting apart the cascade function entity or being sent to the re-transmission buffer memory from the data on upper strata, and will send to described MAC layer, or will send to from the data on upper strata and cut apart the cascade function entity from the data of cutting apart the cascade function entity; And receiving equipment does not have the correct data message that receives again the corresponding data in the described re-transmission buffer memory to be sent to described MAC layer or the described cascade function entity of cutting apart in the data receiving status information that returns according to receiving equipment.

Preferably, described rlc layer or automatically the functions of retransmission entity be further used for: the correct data message that receives of receiving equipment is deleted the corresponding data in the described re-transmission buffer memory in the data receiving status information that returns according to receiving equipment.

Described transmitting apparatus can be NodeB or UE; When described transmitting apparatus was NodeB, described data from the upper strata were the data from upper layer device; When described transmitting apparatus was UE, described data from the upper strata were the data from the UE high level.

The 3rd aspect for achieving the above object the invention provides a kind of transmitting apparatus, comprises in this transmitting apparatus:

Retransmit buffer memory, be used for buffer memory and retransmit related data;

The MAC+ layer is used to receive the SDU from the upper strata, and the SDU that receives is cut apart cascade, and the data that will cut apart cascade are sent to described re-transmission buffer memory, maybe the SDU that receives is sent in the described re-transmission buffer memory, and cuts apart cascade; The data of cutting apart cascade with basis generate transmission block, transmission block is carried out HARQ handle, and the transmission block that generates is sent to receiving equipment; And receiving equipment does not have the correct data message that receives again the corresponding data in the described re-transmission buffer memory to be sent to receiving equipment in the data receiving status information that returns according to receiving equipment.

Preferably, comprise in the described MAC+ layer:

Cut apart the cascade function entity, be used to receive the SDU from the upper strata, and SDU is cut apart cascade, the data that will cut apart cascade send to automatic functions of retransmission entity; Or receive SDU, and the SDU that receives is cut apart cascade from automatic functions of retransmission entity;

Automatic functions of retransmission entity, being used for will be from the data on upper strata, or will be sent to the re-transmission buffer memory from the data of cutting apart the cascade function entity, and receiving equipment does not have the correct data message that receives again the corresponding data in the described re-transmission buffer memory to be sent to receiving equipment in the data receiving status information that returns according to receiving equipment.

Preferably, described MAC+ layer or automatically the functions of retransmission entity be further used for: the correct data message that receives of receiving equipment is deleted the data that receiving equipment in the described re-transmission buffer memory has correctly received in the data receiving status information that returns according to receiving equipment.

Preferably, described transmitting apparatus is NodeB or UE;

When described transmitting apparatus was NodeB, described data from the upper strata were the data from upper layer device;

When described transmitting apparatus was UE, described data from the upper strata were the data from the UE high level.

The 4th aspect for achieving the above object the invention provides a kind of receiving equipment, comprise in this receiving equipment the MAC layer and,

Rlc layer is used to receive the data from the MAC layer, and after the data that received were recombinated, successful SDU sent to the upper strata with reorganization; And return receiving status information to the rlc layer of transmitting apparatus according to the successful SDU of reorganization and the SDU information of reconstructing failure.

Preferably, comprise in the described rlc layer:

The recombination function entity be used for the data from the MAC layer that receive are recombinated, and the SDU information of will recombinate successful SDU or reconstructing failure sends to automatic functions of retransmission entity;

Automatically functions of retransmission entity is used for the SDU from the reorganization success of reorganization functional entity is sent to the upper strata, and according to the described SDU and the SDU information that receive data receiving status information is returned to transmitting apparatus.

Described receiving equipment can be NodeB or UE; When described receiving equipment was NodeB, described upper strata was the upper layer device of NodeB; When described receiving equipment was UE, described upper strata was the high level of UE.

The 5th aspect for achieving the above object the invention provides a kind of receiving equipment, and this receiving equipment comprises:

The MAC+ layer is used to receive the data from physical layer, carries out the HARQ retransmission process, and data are decomposed generation PDU; Reassemble into SDU with the PDU that will resolve into, and according to the SDU of successful SDU of reorganization and reconstructing failure to transmitting apparatus return data receiving status information, or according to the PDU that resolves into to transmitting apparatus return data receiving status information, and the PDU that will correctly receive reassembles into SDU; And the successful SDU that will recombinate sends to the upper strata.

Preferably, comprise in the described MAC+ layer:

Automatically functions of retransmission entity is used for according to the PDU that resolves into or from the SDU of the reorganization success of recombination function entity and the SDU information specified data accepting state of reconstructing failure data receiving status information being returned to transmitting apparatus; And the PDU that will correctly receive sends to the recombination function entity, or will send to the upper strata from the SDU of the reorganization success of reorganization functional entity;

The recombination function entity, be used for the PDU that receives recombinated and generate SDU, and the successful SDU that will recombinate sends to upper strata or automatic functions of retransmission entity, or be further used for when basis is carried out reconstructing failure from the data of MAC layer, not having the information of success to send to described automatic functions of retransmission entity reorganization.

Described receiving equipment can be NodeB or UE; When described receiving equipment was NodeB, described upper strata was the upper layer device of NodeB; When described receiving equipment was UE, described upper strata was the high level of UE.

By such scheme as can be seen, receive Service Data Unit SDU by base station node B among the present invention, be sent to buffer memory in the re-transmission buffer memory that sets in advance after SDU is cut apart cascade, and the data that will cut apart cascade send to terminal UE from upper layer device; UE receives the described data of cutting apart cascade, and to NodeB return data receiving status information; After NodeB receives described data receiving status information, determine whether that according to this data receiving status information needs retransmit, retransmit the corresponding data that then resends in the described re-transmission buffer memory if desired, make the automatic re-transmission of rlc layer between NodeB and UE, carry out, thereby greatly reduce the time delay that rlc layer retransmits automatically, and because the re-transmission buffer memory need not be set, greatly reduce the burden of RNC in RNC, improved the processing speed of RNC; In addition,, reduced the probability that more high-rise re-transmission such as TCP/IP retransmit, also alleviated the more burden of upper layer device, increased the throughput of upper layer device owing in NodeB, increased the automatic re-transmission of rlc layer.

Description of drawings

Fig. 1 is that protocol stack is formed structure chart in the 3GPP agreement R6 version;

Fig. 2 is as the protocol architecture figure of the NodeB of transmitting terminal in the first embodiment of the invention;

Fig. 3 is as the protocol architecture figure of the UE of receiving terminal in the first embodiment of the invention;

Fig. 4 is the flow chart when NodeB is as transmitting terminal in the first embodiment of the invention;

Fig. 5 is as the protocol architecture figure of the NodeB of transmitting terminal in the second embodiment of the invention;

Fig. 6 is as the protocol architecture figure of the UE of receiving terminal in the second embodiment of the invention;

Fig. 7 is the flow chart when NodeB is as transmitting terminal in the second embodiment of the invention;

Fig. 8 is as the protocol architecture figure of the NodeB of transmitting terminal in the third embodiment of the invention;

Fig. 9 is as the protocol architecture figure of the UE of receiving terminal in the third embodiment of the invention;

Figure 10 is the flow chart when NodeB is as transmitting terminal in the third embodiment of the invention;

Figure 11 is as the protocol architecture figure of the NodeB of transmitting terminal in the fourth embodiment of the invention;

Figure 12 is as the protocol architecture figure of the UE of receiving terminal in the fourth embodiment of the invention;

Figure 13 is the flow chart when NodeB is as transmitting terminal in the fourth embodiment of the invention.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.

Main thought of the present invention is, respectively as transmitting terminal and receiving terminal, or in the reciprocal process of receiving terminal and transmitting terminal, transmitting terminal receives the data from upper layer device at NodeB and UE, the data that receive are sent to buffer memory in the re-transmission buffer memory that sets in advance, and send to receiving terminal; Receiving terminal receives described data, and to transmitting terminal return data receiving status information; After transmitting terminal receives described data receiving status information, determine whether that according to this data receiving status information needs retransmit, retransmit the corresponding data that then resends in the described re-transmission buffer memory if desired, thereby realized that the rlc layer that carries out in the former agreement between NodeB and the UE retransmits automatically.

Can be that the rlc layer among the RNC is displaced downwardly among the NodeB among the present invention, and in NodeB, realize rlc layer cut apart cascade, re-transmission, reorganization automatically, SDU abandons and function such as error detection occurs.After rlc layer among the RNC moved down, functional entity in original rlc layer, comprise and cut apart cascade function entity and automatic functions of retransmission entity, recombination function entity etc., in NodeB, can realize by rlc layer separately, also can by with NodeB in original MAC also laminated, form the MAC+ layer and realize.Because so corresponding among the structure among the UE and the NodeB in the previous case, also comprises MAC layer and rlc layer among the UE, under latter event, also MAC layer and rlc layer are merged into the MAC+ layer among the UE.

The present invention will be described in detail below by specific embodiment.

In the first embodiment of the present invention, the re-transmission buffer memory is set in NodeB, and cancels the rlc layer functions of retransmission among original RNC, rlc layer is displaced downwardly to NodeB, in NodeB, realize most of function of rlc layer.

As shown in Figure 2, in the present embodiment as on the MAC layer 21 among the NodeB of transmitting terminal rlc layer 22 being set, and in rlc layer 22, be provided with cut apart cascade function entity 205 and automatically functions of retransmission entity 204 realize rlc layer cut apart cascade and functions of retransmission automatically.

Wherein, the effect of MAC layer 21 and physical (L1) 201 is same as the prior art, no longer elaborates here.And rlc layer 22 is used to receive the SDU from upper layer device, and the SDU that receives is cut apart cascade, and the data that will cut apart cascade are sent to and retransmit in the buffer memory, and the data that will cut apart cascade send to described MAC layer 21; And the status PDU of the carrying data receiving status information that returns according to UE sends to MAC layer 21 with the corresponding data in the described re-transmission buffer memory again.

Wherein, cut apart cascade function entity 205 and specifically be used to receive SDU, and the SDU that receives is cut apart cascade, generate RLC PDU, then the RLC PDU that generates is sent to automatic functions of retransmission entity 204 from upper layer device.Automatically functions of retransmission entity 204 is used for described RLC PDU is sent to the re-transmission buffer memory, and the corresponding data that the status PDU of the carrying data receiving status information that returns according to UE will retransmit in the buffer memory again sends to described MAC layer 21.

In the present embodiment, UE is during as receiving terminal, and its structure is corresponding with NodeB, and as shown in Figure 3, wherein physical layer 301 is corresponding with the physical layer 201 and the HARQ functional entity 202 of NodeB side respectively with HARQ functional entity 302, no longer explanation here.Generation RLC PDU functional entity 303 among Fig. 3 in the MAC layer 31 is corresponding with the generation transmission block functional entity 203 among Fig. 2, be used for the transmission block that HARQ functional entity 302 is uploaded is decomposed generation RLC PDU, then the RLC PDU that generates be uploaded to the automatic functions of retransmission entity 304 in the rlc layer 32.Automatically functions of retransmission entity 304 is corresponding with the automatic functions of retransmission entity 204 of NodeB side, be used for judging according to the RLCPDU sequence number that receives whether reception is correct, and the RLC PDU information that will correctly receive and the wrong RLC PDU information that receives sends to the automatic functions of retransmission entity 204 of NodeB side as data receiving status information by status PDU, and the RLC PDU that will correctly receive is sent to recombination function entity 305.Recombination function entity 305 and NodeB side to cut apart cascade function entity 205 corresponding, the RLC PDU that is used for receiving is sent to the reorganization buffer memory, the RLC PDU in the reorganization buffer memory is recombinated generates SDU, and the SDU that generates is sent to high level.

In the present embodiment, NodeB is as transmitting terminal, and UE is during as receiving terminal, realizes that rlc layer retransmits automatically in the former agreement flow process as shown in Figure 4, specifically may further comprise the steps:

Step 401, NodeB receive the SDU that upper layer device sends, and behind the IP bag, by cutting apart the cascade function entity SDU that is received are cut apart cascade, are about to SDU and generate RLC PDU through over-segmentation or merging.

In this step, can be same as the prior art, according to the PDU size that sets in advance, SDU cut apart or be merged into the identical RLC PDU of size; Also can be the physical layer information of eating dishes without rice or wine that the rlc layer of NodeB obtains according to the configuration of rrc layer, as the transmission block size of eating dishes without rice or wine to allow, SDU be cut apart or be merged into and be suitable for the RLC PDU that varies in size that eats dishes without rice or wine to transmit.

Step 402, automatically the functions of retransmission entity will be cut apart RLC PDU behind the cascade and be sent to the re-transmission buffer memory that buffer memory is cut apart data behind the cascade that is used for that sets in advance, and simultaneously RLC PDU be sent to the MAC layer.

After step 403, MAC layer receive RLC PDU, RLC PDU is added the MAC head, generate MAC PDU, then MAC PDU is formed transmission block and carry out the HARQ processing, and the transmission block that generates is sent to the MAC layer of UE by the physical layer of NodeB and UE.

The MAC layer of step 404, UE receives MAC PDU, obtains the RLC PDU of rlc layer after removing the data head of MAC layer, and the RLC PDU that obtains is sent to the automatic functions of retransmission entity of the rlc layer of UE.

Automatic functions of retransmission entity in the rlc layer of step 405, UE judges according to the sequence number (SN) of RLC PDU whether the RLC PDU that is received is correct, and the PDU information that will correctly receive and do not have the correct PDU information that receives by status PDU, send to the automatic functions of retransmission entity in the rlc layer of NodeB.In addition, in this step, the PDU that automatic functions of retransmission entity will correctly receive sends to the recombination function entity, the PDU that the recombination function entity will correctly receive is placed in the reorganization buffer memory, and by the time sequence number is attempted reorganization SDU for after last PDU receives, if SDU can recombinate, illustrate that then all PDU receive, then form SDU, otherwise, wait after next PDU receives among this SDU, reattempt this SDU of reorganization, behind the SDU that successfully recombinates, the SDU of reorganization is sent to the high level of UE.

The judgement specific implementation that in this step whether RLC PDU is correctly received is identical with the processing during the prior art rlc layer retransmits, and no longer elaborates here.

After automatic functions of retransmission entity in the rlc layer of step 406, NodeB receives the status PDU that UE returns, retransmit the PDU that terminal in the buffer memory has correctly received according to the correct PDU information deletion that receives of the UE that carries in this status PDU, and there is not the correct PDU information that receives according to terminal in the status PDU, send to the MAC layer of NodeB with retransmitting PDU corresponding in the buffer memory, and then send to the automatic functions of retransmission entity in the rlc layer of UE through the flow process of above-mentioned steps 403 and step 404.

In above-mentioned flow process, still correctly do not transmitted after reaching maximum retransmission retransmitting as the data of cutting apart cascade among the NodeB, then no longer retransmit corresponding data.Be automatic functions of retransmission entity among the NodeB behind the PDU that receives carrying repeat requests information, judge whether to have reached maximum retransmission, if these data of deletion in retransmitting buffer memory then; Otherwise the corresponding data that retransmits in the buffer memory is carried out retransmission process.Wherein maximum retransmission is disposed by radio resource controller (RRC).

More than to NodeB as transmitting terminal, UE during as receiving terminal protocol architecture and the rlc layer retransmission processes of NodeB, UE have been described in detail.When UE as transmitting terminal, NodeB is during as receiving terminal, the protocol mechanism of NodeB is basic identical among the protocol architecture of UE and Fig. 2, difference is, the upper layer device of cutting apart cascade function entity and NodeB among Fig. 2 in the NodeB rlc layer carries out the mutual of SDU, and the mutual of SDU carried out on the upper strata of cutting apart cascade function entity and UE side in the rlc layer of UE; The protocol architecture of UE is basic identical among the protocol architecture of corresponding NodeB and Fig. 3, the high level that difference is recombination function entity and UE in the rlc layer of UE among Fig. 3 alternately, and the upper layer device of the recombination function entity of NodeB rlc layer and NodeB is mutual.When UE as transmitting terminal, the NodeB realization that rlc layer retransmits automatically during as receiving terminal only needs in above-mentioned flow process shown in Figure 4, corresponding replaces to UE with NodeB, and the upper layer device of NodeB is replaced to the high level of UE; UE is replaced to NodeB, and the upper layer device that the high level of UE replaces to NodeB is got final product, repeat no more here.

In the second embodiment of the present invention, as shown in Figure 5, when NodeB as transmitting terminal, UE is during as receiving terminal, the difference of NodeB structure is among the structure of NodeB and first embodiment, behind the SDU that the rlc layer 52 of NodeB receives in the present embodiment, at first SDU is sent to retransmit in the buffer memory and carries out buffer memory, and SDU is sent to cuts apart cascade function entity 504 by automatic functions of retransmission entity 505 from upper layer device; In addition, automatically functions of retransmission entity 505 also is used for retransmitting corresponding SDU in the buffer memory according to what receive from the successful SDU information deletion of the status PDU reorganization of UE, and resends the SDU that retransmits correspondence in the buffer memory according to the SDU information of reconstructing failure.The SDU of cutting apart 504 pairs of receptions of cascade function entity is cut apart cascade and is generated RLC PDU, and the RLC PDU that will cut apart again behind the cascade sends to MAC layer 51.After this, the processing of MAC layer 51 is identical with first embodiment.

Accordingly, in the present embodiment as the structure of the UE of receiving terminal as shown in Figure 6, the MAC layer 61 of UE is handled identical with the processing of MAC layer 31 among first embodiment Fig. 3, here also no longer describe in detail, after MAC layer 61 is sent to rlc layer 62 with RLC PDU, the RLC PDU of the 604 pairs of receptions of recombination function entity in the rlc layer 62 recombinates and generates SDU, and the information of will recombinate successful SDU and SDU reconstructing failure sends to automatic functions of retransmission entity 605.Automatic functions of retransmission entity 605, according to the data and the information that receive, the successful SDU of reorganization is sent to the high level of UE, and the SDU information of the SDU information that will recombinate successful and reconstructing failure by status PDU or incidentally information PDU send to the automatic functions of retransmission entity 505 of NodeB side, the automatic functions of retransmission entity 505 of notice NodeB retransmits corresponding SDU in the buffer memory according to the SDU information deletion of the reorganization success that receives, and resends according to the SDU information of reconstructing failure and to retransmit SDU corresponding in the buffer memory.Here, SDU information can be the sequence number of SDU.

In the present embodiment, NodeB is as transmitting terminal, and UE is during as receiving terminal, realizes that flow process that rlc layer retransmits automatically as shown in Figure 7, specifically may further comprise the steps:

Step 701, NodeB receive the SDU that upper layer device sends, and behind the IP bag, the functions of retransmission entity is sent to SDU in the re-transmission buffer memory that sets in advance and carries out buffer memory automatically.

The cascade function entity of cutting apart of step 702, NodeB is cut apart cascade to the SDU that is received, and SDU is generated RLC PDU through over-segmentation or merging, and the RLC PDU that generates is sent to the MAC layer of NodeB.

In this step, can be same as the prior art, according to the PDU size that sets in advance, SDU cut apart or be merged into the identical RLC PDU of size; Also can be the physical layer information of eating dishes without rice or wine that the rlc layer of NodeB obtains according to the configuration of rrc layer, as the transmission block size of eating dishes without rice or wine to allow, SDU be cut apart or be merged into and be suitable for the RLC PDU that varies in size that eats dishes without rice or wine to transmit.

After the MAC layer of step 703, NodeB receives RLC PDU, RLC PDU is added the MAC head, generate MAC PDU, then MAC PDU is formed transmission block and carry out the HARQ processing, and the transmission block that generates is sent to the MAC layer of UE by the physical layer of NodeB and UE.

The MAC layer of step 704, UE receives MAC PDU, obtains the RLC PDU of rlc layer after removing the data head of MAC layer, and the RLC PDU that obtains is sent to the recombination function entity of the rlc layer of UE.

After the recombination function entity of step 705, UE receives RLC PDU, the RLC PDU that receives is sent in the reorganization buffer memory of self, and at buffer memory behind last RLC PDU the RLC PDU of reorganization in the buffer memory recombinated, generate SDU, if recombinate successfully then the successful SDU that will recombinate sends to the automatic functions of retransmission entity of UE; If reorganization is unsuccessful, wait for the transmission state of the next RLCPDU of this SDU, any one PDU is correct as still not transmitting after process HARQ maximum retransmission among this SDU, all the SDU information of this reconstructing failure is notified to the automatic functions of retransmission entity of UE, and is the RLC PDU of this SDU buffer memory in the deletion reorganization buffer memory.

After automatic functions of retransmission entity in the rlc layer of step 706, UE receives the successful SDU of reorganization, the SDU that receives is sent to the upper strata, and by status PDU or incidentally the automatic functions of retransmission entity of information PDU in NodeB return the successful SDU information of described reorganization, and after receiving the SDU information of reconstructing failure, by status PDU or incidentally information PDU the SDU information of reconstructing failure is sent to the automatic functions of retransmission entity of NodeB.

The automatic functions of retransmission entity of step 707, NodeB receives status PDU that UE returns or incidentally behind the information PDU, deletion retransmits that terminal in the buffer memory correctly received according to loaded information wherein, successful SDU promptly recombinates, and correctly do not receive according to terminal in the status PDU, be the SDU information of reconstructing failure, send to the MAC layer of NodeB with retransmitting SDU corresponding in the buffer memory, and then send to the recombination function entity of UE through above-mentioned steps 703 to the flow process of step 704.

In above-mentioned flow process, as among the NodeB SDU is retransmitted reach maximum retransmission after still terminal still do not recombinate successfully, then no longer retransmit corresponding SDU.Be automatic functions of retransmission entity among the NodeB behind the PDU that receives carrying reconstructing failure information, judge corresponding SDU retransmits whether reached maximum retransmission, if this corresponding SDU of deletion in retransmitting buffer memory then; Otherwise the corresponding SDU that retransmits in the buffer memory is carried out retransmission process.Wherein maximum retransmission is disposed by radio resource controller (RRC).

In the third embodiment of the present invention, the re-transmission buffer memory is set in NodeB, and the rlc layer functions of retransmission among the cancellation RNC, in with RNC rlc layer cut apart cascade, reorganization and after functions such as re-transmissions move down among the NodeB automatically, with realize these three functions to cut apart among cascade function entity, automatic functions of retransmission entity, recombination function entity and the NodeB original MAC laminated and become the MAC+ layer.

Present embodiment will move down from the rlc layer of RNC in NodeB cuts apart cascade function entity and functions of retransmission entity automatically, and original MAC is laminated and be called the MAC+ layer among recombination function entity and the NodeB.

As NodeB during as transmitting terminal, as shown in Figure 8, in the MAC+ layer 80, cut apart cascade function entity 805 and be used to receive SDU from upper layer device, and the SDU that receives cut apart cascade, the PDU that will cut apart then behind the cascade sends to automatic functions of retransmission entity 804.Automatically functions of retransmission entity 804 is used for the described PDU of cutting apart behind the cascade is sent to the re-transmission buffer memory, and send to downwards and generate transmission block functional entity 803, and the status PDU of the carrying data receiving status information that returns according to UE will retransmit corresponding PDU in the buffer memory again and send to and generate transmission block functional entity 803, and then send the data to UE by HARQ functional entity and physical layer.In the MAC+ layer 80 except that cutting apart cascade function entity 805 and automatic functions of retransmission entity 804 effect of other entities identical with the effect of correspondent entity in the prior art MAC layer, no longer elaborate here.

Corresponding, the protocol architecture of UE during as receiving terminal as shown in Figure 9.Wherein physical layer 901 is corresponding with the physical layer 801 and the HARQ functional entity 802 of NodeB side respectively with HARQ functional entity 902, no longer explanation here.Generation PDU functional entity 903 among Fig. 9 in the MAC+ layer 90 is corresponding with the generation transmission block functional entity 803 among Fig. 8, be used for the transmission block that HARQ functional entity 902 is uploaded is decomposed generation PDU, then the PDU that generates be uploaded to automatic functions of retransmission entity 904.Automatically functions of retransmission entity 904 is corresponding with the automatic functions of retransmission entity 804 of NodeB side, be used for judging according to the PDU sequence number that receives whether reception is correct, and the PDU information that will correctly receive and the wrong PDU information that receives sends to automatic functions of retransmission entity 804 in the NodeB side MAC+ layer as data receiving status information by status PDU, and the PDU that will correctly receive is sent to the recombination function entity 905 of UE.Recombination function entity 905 and NodeB side to cut apart cascade function entity 805 corresponding, the PDU that is used for receiving is sent to the reorganization buffer memory, the PDU in the reorganization buffer memory is recombinated generates SDU, and the SDU that generates is sent to high level.

NodeB is as transmitting terminal in the present embodiment, and UE is during as receiving terminal, realizes that rlc layer retransmits automatically in the former agreement flow process as shown in figure 10, specifically may further comprise the steps:

MAC+ layer among step 1001, the NodeB receives the SDU that the upper strata sends, and behind the IP bag, the cascade function entity of cutting apart of MAC+ layer is cut apart cascade to the SDU that is received, and promptly SDU is generated PDU through over-segmentation or after merging.

In this step, can be same as the prior art, according to the PDU size that sets in advance, SDU cut apart or be merged into the identical PDU of size; Also can be the physical layer information of eating dishes without rice or wine that the MAC+ layer of NodeB obtains according to the configuration of rrc layer, as the transmission block size of eating dishes without rice or wine to allow, SDU be cut apart or be merged into and be suitable for the PDU that varies in size that eats dishes without rice or wine to transmit.

Step 1002, automatically the functions of retransmission entity will be cut apart the PDU that generates behind the cascade and be sent to the re-transmission buffer memory that buffer memory is cut apart data behind the cascade that is used for that sets in advance, then PDU is formed transmission block, and after carrying out the HARQ processing, the transmission block of forming is sent to the MAC+ layer of UE by the physical layer of NodeB and UE.

After the MAC+ layer of step 1003, UE receives transmission block, at first carry out HARQ and handle, the PDU after will decomposing after transmission block is decomposed sends to the automatic functions of retransmission entity in the UE MAC+ layer.

Automatic functions of retransmission entity in the MAC+ layer of step 1004, UE judges according to the sequence number (SN) of PDU whether PDU receives correct, the PDU that correctly receives is sent to the reorganization buffer memory, by the processing of recombinating of the recombination function entity of UE, and the SDU that generates that will recombinate sends to the upper strata, in addition, automatically functions of retransmission entity PDU information that will correctly receive by status PDU and the PDU information that not have correct reception send to automatic functions of retransmission entity in the MAC+ layer of NodeB by status PDU.

After automatic functions of retransmission entity in the MAC+ layer of step 1005, NodeB receives the status PDU that UE returns, retransmit the PDU that terminal in the buffer memory has correctly received according to the correct PDU information deletion that receives of the UE that carries in this status PDU, and there is not the correct PDU information that receives according to terminal in the status PDU, form transmission block with retransmitting PDU corresponding in the buffer memory, and carrying out after HARQ handles, the physical layer by NodeB and UE sends to automatic functions of retransmission entity in the MAC+ layer of UE again with the transmission block formed.

Identical with first embodiment, in above-mentioned flow process, still correctly do not transmitted after reaching maximum retransmission retransmitting as the data of cutting apart cascade among the NodeB, then no longer retransmit corresponding data.Be automatic functions of retransmission entity among the NodeB behind the PDU that receives carrying repeat requests information, judge whether to have reached maximum retransmission, if the corresponding PDU of deletion in retransmitting buffer memory then; Otherwise the corresponding PDU that retransmits in the buffer memory is carried out retransmission process.Wherein maximum retransmission is disposed by radio resource controller (RRC).

More than to NodeB as transmitting terminal, UE has been described in detail the automatic retransmission processes of rlc layer in the former agreement during as receiving terminal.When UE as transmitting terminal, NodeB is during as receiving terminal, in the present embodiment, the protocol mechanism of NodeB is basic identical among the protocol architecture of UE and Fig. 8, difference is, the upper layer device of cutting apart cascade function entity and NodeB among Fig. 8 in the NodeB MAC+ layer carries out the mutual of SDU, and the high level of cutting apart cascade function entity and UE side in the UE MAC+ layer carries out the mutual of SDU; The protocol architecture of UE is basic identical among the protocol architecture of corresponding NodeB as receiving terminal and Fig. 9, difference is the alternately high-rise of the recombination function entity in the UE MAC+ layer and UE among Fig. 9, and the upper layer device of the recombination function entity of NodeB MAC+ layer and NodeB is mutual.When UE as transmitting terminal, the NodeB realization that rlc layer retransmits automatically in the former agreement during as receiving terminal only needs in above-mentioned flow process shown in Figure 10, corresponding replaces to UE with NodeB, and the upper layer device of NodeB is replaced to the high level of UE; UE is replaced to NodeB, and the upper layer device that the high level of UE replaces to NodeB is got final product, repeat no more here.

In the fourth embodiment of the present invention, as shown in figure 11, when NodeB as transmitting terminal, UE is during as receiving terminal, the difference of NodeB structure is among the structure of NodeB and the 3rd embodiment, behind the SDU that the MAC+ layer 110 of NodeB receives in the present embodiment, at first SDU is sent to retransmit in the buffer memory and carries out buffer memory, and SDU is sent to cuts apart cascade function entity 1104 by automatic functions of retransmission entity 1105 from upper layer device; In addition, automatically functions of retransmission entity 1105 also is used for retransmitting corresponding SDU in the buffer memory according to what receive from the successful SDU information deletion of the status PDU reorganization of UE, and resends the SDU that retransmits correspondence in the buffer memory according to the SDU information of reconstructing failure.Cut apart cascade function entity 1104 and be used for that the SDU that receives is cut apart cascade and generate PDU, will cut apart PDU behind the cascade again and send to and form transmission block functional entity 1103.After this, the processing of transmission block functional entity 1103, HARQ functional entity 1102 and physical layer is identical with the 3rd embodiment.

Accordingly, in the present embodiment as the structure of the UE of receiving terminal as shown in figure 12, the physical layer 1201 of UE, HARQ functional entity 1202 in the MAC+ layer with generate PDU functional entity 1203 respectively with the 3rd embodiment Fig. 9 in physical layer and the HARQ functional entity in the MAC+ layer 90 902 and to generate the processing of PDU functional entity 903 identical, no longer describe in detail here.After generation PDU functional entity 1203 is sent to recombination function entity 1204 with the PDU that generates, recombination function entity 1204 is sent to the PDU that receives in the reorganization buffer memory and carries out buffer memory, and after receiving last PDU of a SDU, the PDU of reorganization in the buffer memory recombinated generates SDU, and the information of will recombinate then successful SDU and SDU reconstructing failure sends to automatic functions of retransmission entity 1205.Automatic functions of retransmission entity 1205, be used for according to the data and the information that receive, the successful SDU of reorganization is sent to the high level of UE, with the SDU information of successful SDU of reorganization and reconstructing failure by status PDU or incidentally information PDU send to the automatic functions of retransmission entity 1105 of NodeB side, the automatic functions of retransmission entity 1105 of notice NodeB retransmits corresponding SDU in the buffer memory according to the SDU information deletion of the reorganization success that receives, and resends according to the SDU information of reconstructing failure and to retransmit SDU corresponding in the buffer memory.

In the present embodiment, NodeB is as transmitting terminal, and UE is during as receiving terminal, realizes that flow process that rlc layer retransmits automatically as shown in figure 13, specifically may further comprise the steps:

The MAC+ layer of step 1301, NodeB receives the SDU that upper layer device sends, and behind the IP bag, the automatic functions of retransmission entity in the MAC+ layer is sent to SDU in the re-transmission buffer memory that sets in advance and carries out buffer memory, and the SDU that receives sent to cuts apart the cascade function entity.

The cascade function entity of cutting apart of step 1302, NodeB MAC+ layer is cut apart cascade to the SDU that is received, and SDU is generated PDU through over-segmentation or merging, and the PDU that generates is sent to the generation transmission block functional entity of NodeB.

In this step, can be same as the prior art, according to the PDU size that sets in advance, SDU cut apart or be merged into the identical PDU of size; Also can be the physical layer information of eating dishes without rice or wine that the cascade function entity obtains according to the configuration of rrc layer of cutting apart in the MAC+ layer of NodeB, as the transmission block size of eating dishes without rice or wine to allow, SDU be cut apart or be merged into and be suitable for the PDU that varies in size that eats dishes without rice or wine to transmit.

After generation transmission block functional entity in the MAC+ layer of step 1303, NodeB receives PDU, PDU is added header, then PDU is formed transmission block and carry out HARQ and handle, and the transmission block that the generates physical layer by NodeB and UE is sent to generation PDU functional entity in the UE MAC+ layer.

After generation PDU functional entity in step 1304, the UE MAC+ layer receives transmission block, decompose, and obtain PDU after removing data head, and the PDU that obtains is sent to the recombination function entity of the MAC+ layer of UE.

After the recombination function entity of step 1305, UE MAC+ layer receives PDU, the PDU that receives is sent in the reorganization buffer memory of self, and at buffer memory behind last PDU the PDU of reorganization in the buffer memory recombinated, generate SDU, if recombinate successfully then the successful SDU that will recombinate sends to the automatic functions of retransmission entity of UE; If reorganization is unsuccessful, wait for the transmission state of the next PDU of this SDU, any one PDU is correct as still not transmitting after process HARQ maximum retransmission among this SDU, all the SDU information of this reconstructing failure is notified to the automatic functions of retransmission entity of UE, and is the PDU of this SDU buffer memory in the deletion reorganization buffer memory.

After automatic functions of retransmission entity in the MAC+ layer of step 1306, UE receives the successful SDU of reorganization, the SDU that receives is sent to the upper strata, and by status PDU or incidentally the automatic functions of retransmission entity of information PDU in NodeB return the successful SDU information of described reorganization, and after receiving the SDU information of reconstructing failure, by status PDU or incidentally information PDU the SDU information of reconstructing failure is sent to the automatic functions of retransmission entity of NodeB.

The automatic functions of retransmission entity of step 1307, NodeB MAC+ layer receives status PDU that UE returns or incidentally behind the information PDU, deletion retransmits that terminal in the buffer memory correctly received according to loaded information wherein, successful SDU promptly recombinates, and correctly do not receive according to terminal in the status PDU, be the SDU information of reconstructing failure, cut apart the cascade function entity with what retransmit that SDU corresponding in the buffer memory sends to NodeB, send to the recombination function entity of UE again through above-mentioned steps 1302 to the flow process of step 1304.

Identical with second embodiment, in above-mentioned flow process, as among the NodeB SDU is retransmitted reach maximum retransmission after still terminal still do not recombinate successfully, then no longer retransmit corresponding SDU.Be automatic functions of retransmission entity among the NodeB behind the PDU that receives carrying reconstructing failure information, judge corresponding SDU retransmits whether reached maximum retransmission, if this corresponding SDU of deletion in retransmitting buffer memory then; Otherwise the corresponding SDU that retransmits in the buffer memory is carried out retransmission process.Wherein maximum retransmission is disposed by RRC.

More than be explanation, in concrete implementation process, can carry out suitable improvement, to adapt to the concrete needs of concrete condition method of the present invention to the specific embodiment of the invention.Therefore be appreciated that according to the specific embodiment of the present invention just to play an exemplary role, not in order to restriction protection scope of the present invention.

Claims (29)

1, the automatic retransmission method in a kind of long term evolution LTE technology is characterized in that, is applied between base station node B and the terminal UE, and as transmitting terminal and receiving terminal or receiving terminal and transmitting terminal, this method may further comprise the steps respectively for NodeB and UE:

A, transmitting terminal receive the data from the upper strata, and the data that receive are sent in the re-transmission buffer memory that sets in advance buffer memory and send to receiving terminal;

B, receiving terminal receive described data, and to transmitting terminal return data receiving status information;

After C, transmitting terminal receive described data receiving status information, determine whether that according to this data receiving status information needs retransmit, retransmit the corresponding data that then resends in the described re-transmission buffer memory if desired.

2, method according to claim 1 is characterized in that, described data from the upper strata are Service Data Unit SDU;

Described data with reception further comprise before being sent to the re-transmission buffer memory that sets in advance: the data that received are cut apart cascade;

Among the then described step B, further comprise after transmitting terminal return data receiving status information: receiving terminal is recombinated to the data of correct reception and is generated SDU.

3, method according to claim 1 is characterized in that, described data from the upper strata are SDU;

The described data that received are sent to further comprises before the receiving terminal: the data that received are cut apart cascade;

Among the then described step B, before transmitting terminal return data receiving status information, further comprise:

Receiving terminal is recombinated to the data that receive, and according to reorganization successful specified data accepting state whether.

According to the described method of claim 1 to 3, it is characterized in that 4, described data receiving status information is by status protocol data cell PDU or incidentally information PDU carrying.

According to the described method of claim 1 to 3, it is characterized in that 5, transmitting terminal does not have the correct data message that receives to determine that needs retransmit according to the receiving terminal in the data receiving status information among the step C.

6, method according to claim 5 is characterized in that, further comprises in the described data receiving status information: the correct data message that receives of receiving terminal;

Among the described step C, transmitting terminal further comprises after receiving described data receiving status information:

Transmitting terminal is according to the corresponding data in the correct data message deletion re-transmission buffer memory that receives of receiving terminal in the data receiving status information.

7, according to arbitrary described method in the claim 1 to 3, it is characterized in that, among the described step B receiving terminal according to the sequence number of received data to transmitting terminal return data receiving status information.

According to arbitrary described method in the claim 1 to 3, it is characterized in that 8, among the described step C, transmitting terminal further comprises after determining and needing to retransmit:

When transmitting terminal has reached predefined maximum retransmission at the number of retransmissions of determining the data that need re-transmission, delete the described data that need re-transmission.

9, method according to claim 8 is characterized in that, described maximum retransmission is provided with by the radio resource controller RRC in the transmitting terminal.

10, according to arbitrary described method in the claim 1 to 3, it is characterized in that, described cut apart cascade, reorganization and retransmit relevant treatment automatically realize by Radio Link control rlc layer;

Sending the data to receiving terminal in the then described steps A is:

Rlc layer in the transmitting terminal is with media interviews control MAC layer, physical layer and the physical layer of receiving terminal and the rlc layer that MAC layer send to receiving terminal of data by transmitting terminal;

Described step B is specifically carried out by the rlc layer of receiving terminal.

11, according to arbitrary described method in the claim 1 to 3, it is characterized in that, described cut apart cascade, reorganization and retransmit relevant treatment automatically realize by the MAC+ layer, also comprise the MAC layer in this MAC+ layer;

Then sending the data to receiving terminal described in the steps A is:

MAC+ layer in the transmitting terminal generates transmission block according to described data, and after carrying out the HARQ processing, the transmission block that generates is sent to the MAC+ layer of receiving terminal by the physical layer of transmitting terminal and receiving terminal;

Described step B is specifically carried out by the MAC+ layer of receiving terminal.

12, according to arbitrary described method in the claim 1 to 3, it is characterized in that, send the data to receiving terminal described in the steps A and be:

After data are formed transmission block, carry out the HARQ retransmission process, send to receiving terminal then.

According to claim 2 or 3 described methods, it is characterized in that 13, the described level of cutting apart is linked as: SDU is cut apart level be linked to be equal-sized PDU, or according to the physical layer information of eating dishes without rice or wine SDU is cut apart level and be linked to be the PDU that is fit to eat dishes without rice or wine to transmit size.

14, method according to claim 13 is characterized in that, the described physical layer information of eating dishes without rice or wine is the transmission block size of eating dishes without rice or wine to allow.

15, method according to claim 14 is characterized in that, described transmission block size of eating dishes without rice or wine to allow is disposed by RRC.

16, a kind of transmitting apparatus comprises the MAC layer in this transmitting apparatus, it is characterized in that, also comprises in this transmitting apparatus:

Retransmit buffer memory, be used for buffer memory and retransmit related data;

Rlc layer is used to receive the SDU from the upper strata, and the SDU that receives is cut apart cascade, and the data that will cut apart cascade are sent in the described re-transmission buffer memory, maybe the SDU that receives is sent in the described re-transmission buffer memory, and cuts apart cascade; Send to described MAC layer with the data that will cut apart cascade; And receiving equipment does not have the correct data message that receives again the corresponding data in the described re-transmission buffer memory to be sent to described MAC layer in the data receiving status information that returns according to receiving equipment.

17, transmitting apparatus according to claim 16 is characterized in that, comprises in the described rlc layer:

Cut apart the cascade function entity, be used to receive SDU, and after the SDU that receives cut apart cascade, the data that will cut apart cascade sent to automatic functions of retransmission entity from the upper strata; Or receive SDU, and after the SDU that receives cut apart cascade, send to the MAC layer from automatic functions of retransmission entity;

Automatic functions of retransmission entity, being used for will be from cutting apart the cascade function entity or being sent to the re-transmission buffer memory from the data on upper strata, and will send to described MAC layer, or will send to from the data on upper strata and cut apart the cascade function entity from the data of cutting apart the cascade function entity; And receiving equipment does not have the correct data message that receives again the corresponding data in the described re-transmission buffer memory to be sent to described MAC layer or the described cascade function entity of cutting apart in the data receiving status information that returns according to receiving equipment.

18, according to claim 16 or 17 described transmitting apparatus, it is characterized in that, described rlc layer or automatically the functions of retransmission entity be further used for: the correct data message that receives of receiving equipment is deleted the corresponding data in the described re-transmission buffer memory in the data receiving status information that returns according to receiving equipment.

According to claim 16 or 17 described transmitting apparatus, it is characterized in that 19, described transmitting apparatus is NodeB or UE;

When described transmitting apparatus was NodeB, described data from the upper strata were the data from upper layer device;

When described transmitting apparatus was UE, described data from the upper strata were the data from the UE high level.

20, a kind of transmitting apparatus is characterized in that, comprises in this transmitting apparatus:

Retransmit buffer memory, be used for buffer memory and retransmit related data;

The MAC+ layer is used to receive the SDU from the upper strata, and the SDU that receives is cut apart cascade, and the data that will cut apart cascade are sent to described re-transmission buffer memory, maybe the SDU that receives is sent in the described re-transmission buffer memory, and cuts apart cascade; The data of cutting apart cascade with basis generate transmission block, transmission block is carried out HARQ handle, and the transmission block that generates is sent to receiving equipment; And receiving equipment does not have the correct data message that receives again the corresponding data in the described re-transmission buffer memory to be sent to receiving equipment in the data receiving status information that returns according to receiving equipment.

21, transmitting apparatus according to claim 20 is characterized in that, comprises in the described MAC+ layer:

Cut apart the cascade function entity, be used to receive the SDU from the upper strata, and SDU is cut apart cascade, the data that will cut apart cascade send to automatic functions of retransmission entity; Or receive SDU, and the SDU that receives is cut apart cascade from automatic functions of retransmission entity;

Automatic functions of retransmission entity, being used for will be from the data on upper strata, or will be sent to the re-transmission buffer memory from the data of cutting apart the cascade function entity, and receiving equipment does not have the correct data message that receives again the corresponding data in the described re-transmission buffer memory to be sent to receiving equipment in the data receiving status information that returns according to receiving equipment.

22, according to claim 20 or 21 described transmitting apparatus, it is characterized in that, described MAC+ layer or automatically the functions of retransmission entity be further used for: the correct data message that receives of receiving equipment is deleted the data that receiving equipment in the described re-transmission buffer memory has correctly received in the data receiving status information that returns according to receiving equipment.

According to claim 20 or 21 described transmitting apparatus, it is characterized in that 23, described transmitting apparatus is NodeB or UE;

When described transmitting apparatus was NodeB, described data from the upper strata were the data from upper layer device;

When described transmitting apparatus was UE, described data from the upper strata were the data from the UE high level.

24, a kind of receiving equipment comprises the MAC layer in this receiving equipment, it is characterized in that, also comprises in the described receiving equipment:

Rlc layer is used to receive the data from the MAC layer, and after the data that received were recombinated, successful SDU sent to the upper strata with reorganization; And return receiving status information to the rlc layer of transmitting apparatus according to the successful SDU of reorganization and the SDU information of reconstructing failure.

25, receiving equipment according to claim 24 is characterized in that, comprises in the described rlc layer:

The recombination function entity be used for the data from the MAC layer that receive are recombinated, and the SDU information of will recombinate successful SDU or reconstructing failure sends to automatic functions of retransmission entity;

Automatically functions of retransmission entity is used for the SDU from the reorganization success of reorganization functional entity is sent to the upper strata, and according to the described SDU and the SDU information that receive data receiving status information is returned to transmitting apparatus.

According to claim 24 or 25 described receiving equipments, it is characterized in that 26, described receiving equipment is NodeB or UE;

When described receiving equipment was NodeB, described upper strata was the upper layer device of NodeB;

When described receiving equipment was UE, described upper strata was the high level of UE.

27, a kind of receiving equipment is characterized in that, comprises in the described receiving equipment:

The MAC+ layer is used to receive the data from physical layer, carries out the HARQ retransmission process, and data are decomposed generation PDU; Reassemble into SDU with the PDU that will resolve into, and according to the SDU of successful SDU of reorganization and reconstructing failure to transmitting apparatus return data receiving status information, or according to the PDU that resolves into to transmitting apparatus return data receiving status information, and the PDU that will correctly receive reassembles into SDU; And the successful SDU that will recombinate sends to the upper strata.

28, receiving equipment according to claim 27 is characterized in that, comprises in the described MAC+ layer:

Automatically functions of retransmission entity is used for according to the PDU that resolves into or from the SDU of the reorganization success of recombination function entity and the SDU information specified data accepting state of reconstructing failure data receiving status information being returned to transmitting apparatus; And the PDU that will correctly receive sends to the recombination function entity, or will send to the upper strata from the SDU of the reorganization success of reorganization functional entity;

The recombination function entity, be used for the PDU that receives recombinated and generate SDU, and the successful SDU that will recombinate sends to upper strata or automatic functions of retransmission entity, or be further used for when basis is carried out reconstructing failure from the data of MAC layer, not having the information of success to send to described automatic functions of retransmission entity reorganization.

According to claim 27 or 28 described receiving equipments, it is characterized in that 29, described receiving equipment is NodeB or UE;

When described receiving equipment was NodeB, described upper strata was the upper layer device of NodeB;

When described receiving equipment was UE, described upper strata was the high level of UE.

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