WO2008007176A1 - Data transceive method and device of high speed downlink packet access - Google Patents

Abstract

A data transceive method and device of high-speed downlink packet access is used for transmitting the multiplexed different priority level queues MAC-hs PDU effectively. In this invention, when the user device is receiving the multiplexed PDU successfully, the validity of each MAC-hs PDU of the multiplexed PDU is determined, according to the movement situation of the receive window of each reordering queue during transmitting and the location of the receive window of each reordering queue at the moment before and after the transmission. Furthermore, the occasion for stopping retransmitting multiplexed PDU at the network side is defined. When the MAC-hs PDU matching the preset conditions and contained in the multiplexed PDU is requested to stop retransmitting, the multiplexed PDU is stopped retransmitting.

Description

 Data transmission and reception method and device for high speed downlink packet access

 This application claims the priority of the Chinese patent application filed on June 2, 2006, the Chinese Patent Office, the application number is 200610084932.4, and the invention is entitled "High-speed downlink packet access data transmission and reception method and device." Combined in this application.

TECHNICAL FIELD The present invention relates to the field of mobile communications, and in particular, to a High Speed Downlink Packet Access (HSDPA) technology. BACKGROUND OF THE INVENTION The 3rd Generation Partnership Project (3rd Generation Partnership Project, referred to as "3GPP") promotes the standardization of the third generation mobile communication (The Third Generation, "3G") technology as an important organization in the field of mobile communication. The bearers of the uplink and downlink services in its earlier protocol versions are based on dedicated channels. With the development of mobile communication technology, 3G technology is also evolving. High Speed Downlink Packet Access (HSDPA) and High Speed Uplink Packet Access (HSUPA) are important evolutions of 3G technology. The scheduling and retransmission of data packets in HSDPA and HSUPA are controlled by a base station node (Node B). Among them, HSDPA as a downlink high-speed packet access technology was introduced into the 3GPP version 5 (Release 5, "R5") version in 2002, which uses a shorter 2ms transmission time interval (Transmission Time Interval, Call "ΤΤΓ" for fast adaptive control. Adaptive Modulation and Coding ("AMC") and Hybrid Auto Repeat reQuest (HARQ) are used at the physical layer. ).

Confirmation In addition, the role of the wireless interface protocol is to establish, reconfigure, and release radio bearers. The HSDPA-related protocol in the wireless air interface (Uu interface) has three layers from the control plane: the physical layer is the first layer, the medium access control protocol layer ("MAC") and The radio link control protocol (Radio Link Control, "RLC") layer is the second layer, and the corresponding Radio Resource Control ("RRC") layer is the second layer. In the MAC layer, the MAC layer logical structure consists of three logical entities:

MAC-b entity, which is used to process the broadcast channel (Broadcast Channel, referred to as "BCH"), in each user equipment (User Equipment, called "UE") and the universal mobile communication system terrestrial radio access network (UMTS Terrestrial Radio Access) Each cell (located in Node B) of Network, referred to as "UTRAN", has a MAC-b entity.

A MAC-c/sh entity for processing a paging channel (Paging Channel, referred to as "PCH"), a forward access channel (FACH), and a random access channel (Random Access Channel) "RACH"), an uplink common packet channel (Common Packet Channel), and a downlink shared channel (Downlink Shared Channel, "DSCH"), such as a common channel and a shared channel. There is one MAC-c/sh entity in each UE using the shared channel; one MAC-c/sh entity in each cell of the UTRAN, located in the Controlling Radio Network Controller ("CRNC") in.

A MAC-d entity that handles a dedicated channel (Dedicated Channel, referred to as "DCH") assigned to the UE in connected mode. There is one MAC-d entity in each UE.

HSDPA adds a high-speed downlink shared channel in the way of DSCH reference (High The Speed Downlink Shared Channel, called "HS-DSCH", relies on HARQ and AMC to adapt to channel variations. Different users share HS-DSCH channels on time division and code division. In order to carry the downlink signaling, a High Speed Shared Control Channel (HS-SCCH) is also added, and the HS-DSCH-related uplink uses a High Speed Dedicated Physic Control Channel (referred to as "High Speed Dedicated Physic Control Channel"). HS-DPCCH"), ACKTNACK bit information and Channel Quality Indication (CQI) information carrying HARQ. Specifically, the Node B learns whether the data is correctly received through the HS-DPCCH. If it is not correct, retransmission will be initiated, otherwise new data is sent. The UE learns whether there is data sent by the Node B on the corresponding HS-DPDCH through the HS-SCCH, and obtains the number of parallel code channels and corresponding spreading codes and transmission block sizes required for demodulating the HS-PDSCH from the HS-SCCH. Transmission format and resource information of the modulation scheme, etc.; In each TTI, the HS-PDSCH can only transmit data of one UE. The information carried by the HS-SCCH includes: 7-bit channel code set information, 1-bit modulation scheme information, 6-bit transmission block size information, 3-bit HARQ process information, 3-bit redundancy version, and Constellation version information, 1 bit new data indicator (New Data Indicator) and 16-bit UE identification HS-DSCH Radio Network Temporary Identity ("HR TI") „ UE according to HS - The 16-bit H-RNTI carried on the SCCH is used to determine whether the corresponding HS-PDSCH channel carries its own data. Since the HSDPA adds the transmission channel HS-DSCH, in order to support the physical layer process of HSDPA,

The MAC layer of the UE and UTRAN (located in Node B) adds an HSDPA-specific function. The entity MAC-hs, to handle the required actions, namely the scheduling of HARQ, AMC and HS-DSCH (Scheduling) - the structure of the MAC-hs entity in the UTRAN and the UE are as shown in Figures 1 and 2, respectively. As shown in FIG. 1, when the MAC-hs entity on the Node B receives the MAC-d Protocol Data Unit ("PDU"), that is, the Service Data Unit (SDU) Thereafter, resources on the HS-DSCH between the HARQ entities are managed by priority processing and packet scheduling (Scheduling/Priority Handling) according to the priority of the SDU. In addition to determining whether to retransmit the PDU or send a new PDU according to the status report returned by the HARQ entity, the HARQ entity also determines the Queue ID (Queue Number) and the Transmission Sequence Number ("TSN") of the MAC-hs PDU. Among them, a UE can have up to 8 independent HARQ processes. The Transport Format Resource Combination ("TFRC") selection unit is responsible for selecting the number of code channels including parallel and the corresponding spreading code, transmission block size, modulation scheme, etc. for transmission on the HS-DSCH. Format and resources. As shown in FIG. 2, when the MAC-hs entity on the UE side receives the MAC-hs from the HS-DSCH channel.

The PDU is first sent to the HARQ entity, and the HARQ entity on the UE side is the receiver of the HARQ entity on the UTRAN side, and is responsible for performing operations such as generating an ACK (correct response)/NACK (error response) response, HARQ soft combining, and the like. After HARQ processing, the reordering queue unit allocates the MAC-hs PDU according to the Queue ID field of the MAC-hs PDU header to the corresponding reordering queue, and in the reordering queue, according to the header of each MAC-hs PDU The TSN field reorders the MAC-hs PDUs to restore the original packet sequence. Finally, the original sequence of MAC-hs PDUs is sent to the split unit, and the split unit is based on the MAC-hs PDU header. SID (length indication of SDU), N (SDU The PDU is sent to the MAC-d entity.

The transmission format of the MAC-hs PDU is shown in Figure 3, where the PDU is divided into a header and a payload portion. The header contains fields such as Version Flag (VF), Queue ID, TSN, SID, N and F. Specifically, the length of the VF field is 1 bit, which is used to identify the version of the PDU. The VF value of the current protocol is 0. The length of the Queue ID field is 3 bits, which is used to identify the PDU of the same priority queue. The length of the TSN field is 6 bits. For identifying the sequence number of the PDU, so that the UE at the receiving end can restore the original PDU sequence according to the sequence number; the length of the SID field is 3 bits, and is used to indicate the length of the SDUs of the same size sequenced together (the length of the SDU) The corresponding SID is configured by the upper layer); the length of the N field is 7 bits, indicating the number of SDUs that are cascaded together in the same size. The payload portion is multiplexed by multiple SDUs, and the SDUs of the same length are cascaded together, and the size and the number of SDUs that are sequentially cascaded are identified by the corresponding SID and N fields of the PDU header. The F field of 1 bit indicates whether the subsequent SID and N field identifiers corresponding to the SDU of another size, wherein if the F field is "0", the subsequent SDU corresponding to another size is corresponding to The SID and N field identifiers, if the field is "1", indicate the end of the PDU header, that is, the subsequent payload portion of the PDU. However, when a UE has multiple priority queues of different priorities at the same time, and the amount of data in these queues is smaller than the amount of data that the current TTI can actually accommodate on the HS-DSCH, for example, HSDPA is used to transmit packet voice (Voice over) When low-speed small packet services such as IP, referred to as "VoIP", the MAC-hs entity can only transmit data of one of the priority queues, so that the current TTI is The actual bandwidth on the HS-DSCH is not fully utilized, and the utilization of the air interface resources is low. In order to solve the problem that the resource utilization of one priority queue of one UE can be transmitted by one TTI in the HSDPA prior art, the MAC-hs PDU level of at least two different priority queues may be required. The multiplexed PDUs that are joined together to form a cascade are transmitted in one TTI. Among them, the structure of the multiplexed PDU can have various definitions, and FIG. 4a and FIG. 4b show the structure of two kinds of multiplexed PDUs. In both configurations, each MAC-hs PDU (without padding field) of two or more priority queues belonging to the same UE is cascaded after removing the VF. In Figure 1, PF is a padding pointer identifier indicating whether there is a padding pointer field. In FIG. 4b, a CF field of one bit is added after each MAC-hs PDU, and when the CF does not exist, it indicates that the MAC-hs PDU is not filled with data; when the CF exists, it is used to indicate that the subsequent data is another The MAC-hs PDU is either padding data. The MAC-hs structures on the corresponding UTRAN side and UE side are as shown in FIG. 5 and FIG. 6, respectively. The PDU cascading unit is added to the priority processing and the packet scheduling function in the MAC-hs entity on the UTRAN side, so that MAC-hs PDUs of different priority queues from the same UE are formed in the PDU cascading unit as needed. Multiplexing PDUs; and correspondingly, in the MAC-hs entity of the UE side, a de-cascading unit is added between the HARQ entity and the reordering queue allocating unit, and the function of the unit is to multiplex the MAC-hs in the PDU. The PDUs are delimited so that corresponding de-cascading can be implemented to demultiplex each individual MAC-hs PDU from the multiplexed PDU.

The receiving window in the HSDPA receiving end MAC-hs reordering queue is shown in Figure 7. The receiving window size (RECEIVE JI DOW_SIZE) is set by the upper layer protocol. Since the maximum value of TSN is 63, the maximum receiving window size is 32 in order not to cause TSN blurring. Wherein, the MAC-hs PDU whose value is the variable RcvWindow_UpperEdge (the upper edge of the receiving window) is the receiving end. The MAC-hs PDUs with the highest sequence number value among all the received MAC-hs PDUs; the MAC-hs PDUs whose TSN is smaller than the value of the variable next_expected_TSN (the next expected received TSN) have been received sequentially. Since the TSN is modulo 64 (Mod 64), all of the TSN-related variables and operations here are modulo 64 (Mod 64). Specifically, the receiving process of the sliding window based MAC-hs PDU in the HSDPA receiving end reordering queue is as shown in FIG. 8. In step 801, when a MAC-hs PDU whose TSN is the SN arrives at the reordering queue, it is first determined whether the SN is in the receiving window. If yes, the process proceeds to step 807; otherwise, the process proceeds to step 802. In step 802, the SN is outside the receiving window, and the MAC-hs PDU is buffered according to S at a corresponding position in the reordering queue. Go to step 803. In step 803, the receiving window is advanced, that is, RcvWindow-UpperEdge is updated to SN. And proceeds to step 804. In step 804, the MAC-hs PDU in the original receiving window with the TSN less than or equal to RcvWindow_Upper Edge-RECEIVE_WINDOW_SIZE is moved out of the reordering queue and output to the splitting unit, and then outputted to the splitting unit. Go to step 805. In step 805, it is further determined whether next_expected_TSN is after the updated reception window, and if yes, proceeds to step 806; otherwise, proceeds to step 810.

- In step 806, update next-expected- TSN, ie next-expected- TSN = cvWmdow_UpperEdge-RECEIVE_WINDOW_SIZE + 1. And the process also proceeds to step 810. In step 807, it is determined whether the SN is smaller than the next-expected-TSN or the MAC-hs PDU with the sequence number SN has been received. If yes, the process proceeds to step 808; otherwise, the process proceeds to step 809. In step 808, the MAC-hs PDU is discarded and likewise proceeds to step 810. In step 809, the MAC-hs PDU is buffered according to S at a corresponding location in the reordering queue, and likewise proceeds to step 810. In step 810, it is determined whether there is already a MAC-hs PDU whose TSN is next_expected-TSN in the reordering queue. If yes, the process proceeds to step 811; otherwise, the process ends. In step 811, all the TSNs are sequentially added from the next-expected- TSN sequence to the first MAC-hs PDU that has not been received yet to the split unit, and then proceeds to step 812. In step 812, the next-expected- TSN is set to the TSN of the first MAC-hs PDU that has not been received. End this process. Compared with the above receiving process, the transmitting end is also transmitted based on the sliding window, as shown in FIG. After transmitting a MAC-hs PDU whose TSN is SN0, the sender will retransmit if it receives the NACK message from the receiving end. If SN0 ≤ SN b TRANSMIT — WINDOW — SIZE is still not received correctly, it will not be performed. Retransmission, where TRANSMIT_WINDOW_SIZE is the size of the transmission window, and SN1 is the TSN of the most recently transmitted MAC-hs PDU. When a single MAC-hs PDU is transmitted, stopping the retransmission of the MAC-hs PDU is caused by the sliding of the transmit window. For the case of multiplexing PDU transmission, the average number of retransmissions of MAC-hs PDUs in different priority queues in the multiplexed PDU is affected by the sliding of the transmission window. The influence of dynamic factors such as the number of MAC-hs priority queues, the number of users, and the amount of data transmitted, and the priority of the corresponding priority queue of the MAC-hs PDU. Therefore, when the scheme for transmitting the multiplexed PDU is used, since the existing receiving process for the MAC-hs PDU only considers the sliding factor of the receiving window, the MAC-hs PDUs of the different priority queues cannot be effectively transmitted. . More information related to the above technical solutions can be found in the following documents:

3GPP specification TS 25.212 "Multiplexing and channel coding ()) (FDD).

Summary of the invention

The present invention provides a data transmission and reception method and device for high-speed downlink packet access, so that MAC-hs PDUs of multiple different priority queues can be effectively transmitted. In one aspect, a data receiving method for high speed downlink packet access is provided, including the following steps: the user equipment obtains a high speed medium access control MAC-hs protocol data unit PDU multiplexed by at least two priority queues on the network side. When multiplexing PDUs, demultiplexing them to obtain MAC-hs PDUs of a single priority queue; from the first transmission to the correct reception of the multiplexed PDU, if the receiving window of the reordering queue to which the MAC-hs PDU belongs If the moving distance is greater than or equal to the predetermined value, the MAC-hs PDU is discarded. In another aspect, a data retransmission method for providing high speed downlink packet access includes the following steps: multiplexing, at a network side, a high speed medium access control MAC-hs protocol data unit PDU of at least two priority queues into a multiplexing PDU, When the multiplexed PDU is retransmitted, if the MAC-hs PDU that meets the predetermined condition included in the multiplexed PDU is required to stop retransmission, the retransmission of the multiplexed PDU is stopped. In another aspect, a user equipment for providing high speed downlink packet access includes a receiving module for receiving a PDU, and a demultiplexing module, configured to receive, by the receiving module, at least two priority queues by the network side.

When the multiplexed PDU is multiplexed by the MAC-hs PDU, the multiplexed PDU is demultiplexed to obtain at least one MAC-hs PDU; at least one reordering queue is used for reordering the MAC-hs PDU; and window monitoring a module, configured to monitor, during a period from the first transmission to the correct reception of the multiplexed PDU, whether a moving distance of a receiving window of the reordering queue to which the MAC-lis PDU belongs is greater than or equal to a predetermined value, and if yes, discard the MAC-hs PDU. In addition, a base station node for high speed downlink packet access is provided, including: a multiplexing module, configured to multiplex a high speed medium access control MAC-hs protocol data unit PDU of at least two priority queues into a multiplexed PDU; And the second judging module is configured to determine whether the MAC-hs PDU included in the multiplexed PDU that meets the predetermined condition is required to stop retransmission, if yes The transmission module stops retransmission of the multiplexed PDU. By comparison, it can be found that, in an embodiment of the present invention, when the UE correctly receives the multiplexed PDU, the UE does not directly cache the MAC-hs PDU into the corresponding reordering queue, but determines that Whether the moving distance of the receiving window of the corresponding reordering queue has exceeded the limit from the first transmission to the correct reception of the multiplexed PDU, and if so, discarding the MAC-hs PDU, otherwise the MAC-hs PDU is buffered to the corresponding weight Sort the queue. In this way, the UE can pre-exclude a batch of obsolete MAC-hs PDUs, reducing the problem of erroneously collecting outdated MAC-hs PDUs because the TSN numbers are the same. In another embodiment of the present invention, on the network side, the timing of stopping the multiplexing of PDU retransmissions is specified. For example, when all the MAC-hs PDUs included in the multiplexed PDU are required to stop retransmission, or the multiplexed MAC-hs PDU of the corresponding priority queue in the MAC-hs PDU included in the PDU is multiplexed. When it is requested to stop retransmission, or to multiplex the MAC-hs PDU included in the corresponding priority queue in the MAC-hs PDU included in the PDU, the maximum MAC-hs PDU is required to stop retransmission and the like. At these times, the retransmission of the multiplexed PDU is stopped, which reduces the waste of resources, because at least one MAC-hs PDU in the retransmitted multiplexed PDU is valid, and on the other hand, the transmission performance is guaranteed, not because of one If the MAC-hs PDU is invalid, the multiple valid MAC-hs PDUs in the multiplexed PDU are stopped and retransmitted together.

DRAWINGS

1 is a structural diagram of a UTRAN-side MAC-hs supporting single-priority queue multiplexing in the prior art; FIG. 2 is a structural diagram of a UE-side MAC-hs supporting single-priority queue multiplexing in the prior art; A schematic diagram of a format of a MAC-hs PDU multiplexed by a single priority queue in the prior art; FIG. 4 is a structural diagram of a UTRAN side MAC-hs supporting multi-priority queue multiplexing in the prior art; 5 is a structural diagram of a UE-side MAC-hs supporting multi-priority queue multiplexing in the prior art; FIG. 6 is a schematic diagram of a format of a multi-priority queue-multiplexed MAC-hs PDU in the prior art; A schematic diagram of a receiving window in a reordering queue of a HSDPA receiving end in the prior art; FIG. 8 is a flowchart of a method for transmitting a MAC-hs PDU with single priority queue multiplexing in the prior art; FIG. 9 is a transmission window of a HSDPA transmitting end in the prior art. FIG. 10 is a schematic diagram of a reception error caused by TSN ambiguity of a cascaded MAC-hs PDU in an embodiment of the present invention; FIG. 11 is a flowchart of a data reception method of HSDPA according to the first embodiment of the present invention. detailed description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings. In the present invention, when the UE correctly receives data from the network side, it is determined whether the data is a multiplexed PDU formed by cascading MAC-hs PDUs in at least two priority queues of the same UE, or belongs to the same priority queue. The MAC-hs PDU in the middle, and the corresponding receiving processing. After the multiplexed PDU is correctly received by the UE, the MAC-hs PDU of the queue with a higher priority and a smaller transmit/receive window may be "outdated, for a long time, so the received TSN of the MAC-hs PDU will be The TSN with the current receive window is ambiguous (the MAC-hs PDU of the single priority queue will not be blurred). If the TSN of the "outdated" MAC-hs PDU is within the current receive window (due to TSN blur) The illusion of receiving the "outdated" MAC-hs PDU may cover the useful MAC-hs PDU of the same TSN. If the TSN of the "outdated" MAC-hs PDU If it is not within the receiving window (the illusion caused by TSN ambiguity), the "outdated" MAC-hs PDU will cause the receiving window to be erroneously advanced and the loss of a large number of MAC-hs PDUs if it directly enters the corresponding reordering queue. , as shown in Figure 10. Therefore, in the present invention, when the UE correctly receives the multiplexed PDU, it does not cache the MAC-hs PDU therein into the corresponding reordering queue, but judges that the multiplexing is performed from the first transmission to the correct reception. During the process of the PDU, whether the moving distance of the receiving window of the corresponding reordering queue has exceeded the limit, if yes, the MAC-hs PDU is discarded, otherwise the MAC-hs PDU is buffered to the corresponding reordering queue. On the network side, the timing for stopping the retransmission of the multiplexed PDU is specified. For example, when all the MAC-hs PDUs included in the multiplexed PDU are required to stop retransmission, or the multiplexed MAC-hs PDU of the corresponding priority queue in the MAC-hs PDU included in the PDU is multiplexed. When it is requested to stop retransmission, or to multiplex the MAC-hs PDU of the corresponding priority queue in the MAC-hs PDU included in the PDU, the maximum MAC-hs PDU is required to stop retransmission. The data receiving method of the HSDPA according to the first embodiment of the present invention is as shown in FIG. The UE demultiplexes the multiplexed PDU by de-cascading. In step 1101, the network side forms a multiplexed PDU by cascading MAC-hs PDUs in at least two priority queues belonging to the same UE, and if the UE receives data from the network side as a multiplexed PDU, then Go to step 1102; if the UE does not receive the multiplexed PDU, but the MAC-hs PDU of the single priority queue, then go to step 1104. In step 1102, the data received by the UE is a multiplexing: PDU, and when a HARQ process on the HARQ entity of the UE starts the first transmission, the reordering queues of the current time are recorded. RcvWindow—the value of UpperEdge^,^·) , ζ· = 0,1,Λ Μ , M is the number of reordering queues, and k is the kth HARQ process. The UE is based on the "New Data Indicator" on the HS-SCCH.

(new data indication) "The bit judges whether it is currently the first transmission. Before the multiplexed PDU is correctly received, it is judged whether or not the reception window advances, if the reception window of the corresponding reordering queue moves forward, the upper edge thereof is equal to or When the recorded value is exceeded, that is, the increase of the upper edge is equal to or greater than 64, the moving distance overrun event occurs in the receiving window. For example, an indicator variable can be used to record whether the event occurs. Event =) = 1 and go to step 1103; otherwise, record ') = 0, cache the MAC-hs PDU to the home reordering queue, and go to step 1104. In this way, the UE can pre- Excluding a batch of obsolete MAC-hs PDUs, the problem of incorrectly receiving outdated MAC-hs PDUs due to the same TSN sequence number does not occur. In step 1103, the multiplexed PDUs are discarded. Proceed to step 1114. In step 1104 During the first transmission to the correct reception, if the moving distance of the receiving window of the reordering queue to which the MAC-hs PDU belongs is less than the predetermined value, the process proceeds to step 1103, where the TSN is further The MAC-hs PDU between the upper edge position of the receiving window and the lower edge position of the current window is discarded during the first transmission, and the reserved MAC-hs PDU is received and processed in a sliding window manner. This can further eliminate the obsolete MAC-hs PDU. Therefore, it is ensured that the MAC-hs PDUs of the multiple different priority queues multiplexed and transmitted can be correctly received in the reordering queue of the receiving end; if the moving distance of the receiving window of the reordering queue to which the MAC-hs PDU belongs is greater than or equal to the predetermined If yes, the process proceeds to step 1105. The predetermined value is the maximum value N of the TSN of the MAC-hs PDU, and the TSN of the MAC-hs PDU. The increase is in the form of the modulo N, and the incremental step size is 1. In the present embodiment, the description is made with N = 64. When the multiplexed PDU is correctly received, the lower edge position JV ₂ (i) of the reception window of each reordering queue at that time is recorded. Where ₂ (z') - RcvWindow - UpperEdge - RECEIVE - WINDOW - SIZE + 1 , RcvWindow_UpperEdge is the upper edge of the current receiving window. If a moving distance overrun event occurs in the reordering queue to which the MAC-hs PDU belongs, the moving distance of the receiving window is determined to be the maximum value of TSN, otherwise the moving distance of the receiving window is determined to be the maximum value of TSN. In step 1105, for the MAC-hs PDU in the multiplexed PDU, the ^^ at the time of the first transmission is obtained from the record! And ff ₂ at the time of correct reception, further determining whether the transmission sequence number TSN of the MAC-hs PDU is between ^ and ^ (modulo 64), and if yes, proceeding to step 1111; otherwise, proceeding to step 1106. In step 1106, the SN is outside the receiving window, and the MAC-hs PDU is buffered in the corresponding position in the reordering queue according to the SN. Proceed to step 1107. In step 1107, the receiving window is advanced, that is, RcvWindow-UpperEdge is updated to SN. And proceeds to step 1108. In step 1108, the MAC-hs PDU in the original receiving window with the TSN less than or equal to RcvWindow_Upper Edge-RECEIVEJWINDOW_SIZE is moved out of the reordering queue and output to the splitting unit, and then enters, while the receiving window is moved forward. Step 1109. In step 1109, it is further determined whether the next-expected-TSN is after the updated reception window, and if so, proceeds to step 1110; otherwise, proceeds to step 1114. In step 1110, next-expected-TSN is updated, ie, next-expected- TSN = RcvWindow_UpperEdge-RECEIVE_WINDOW_SIZE + 1. And also proceeds to step 1114. In step 1111, it is determined whether the SN is smaller than next-expected- TSN or whether the MAC-hs PDU whose TSN is the SN has been received. If yes, the process proceeds to step 1112; otherwise, the process proceeds to step 1113. In step 1112, the MAC-hs PDU is discarded and likewise proceeds to step 1114. In step 1113, the MAC-hs PDU is buffered in the corresponding location in the reordering queue according to the SN, and the process proceeds to step 1114. In step 1114, it is determined whether there is already a MAC-hs PDU whose TSN is next-expected- TSN in the reordering queue. If yes, the process proceeds to step 1115; otherwise, the process ends. In step 1115, all the TSNs are sequentially added from the next-expected- TSN sequence to the first MAC-hs PDU that has not been received yet to the split unit, and then proceeds to step 1116. In step 1116, next-expected-TSN is set to the TSN of the first MAC-hs PDU that has not been received. End this process.

In the above embodiment, the value of the upper edge of the receiving window of each reordering queue is recorded at the time of the first transmission, and if the upper edge of the receiving window is equal to or exceeds the corresponding recording value due to the forward movement of the receiving window before the correct reception, it is considered The moving distance of the receiving window has exceeded the limit. In this way, the UE can improve the accuracy of receiving the MAC-hs PDU, and reduce the erroneous collection of obsolete because the TSN number is the same. The problem with the MAC-hs PDU. In addition, in this embodiment, in the modulo N mode (N is the TSN maximum value), the MAC-hs PDU between the upper edge position of the receiving window and the lower edge position of the current window at the time of the first transmission is further discarded by the TSN. The reserved MAC-hs PDU is received and processed in a sliding window manner. This can further eliminate obsolete MAC-hs PDUs, thereby ensuring that MAC-hs PDUs of multiple different priority queues multiplexed for transmission can be correctly received in the reordering queue of the receiving end. The data retransmission method of the HSDPA according to the second embodiment of the present invention is: on the network side, when the MAC-hs PDU that meets the predetermined condition included in the multiplexed PDU is required to stop retransmission, if the MAC-hs meets the predetermined condition If there are more than one PDU, the retransmission of the multiplexed PDU is stopped when all MAC-hs PDUs that meet the predetermined condition are required to stop retransmission. The MAC-hs PDU that meets the predetermined condition may be: all the MAC-hs PDUs included in the multiplexed PDU; or the MAC-hs PDU with the lowest priority corresponding to the priority queue; or, the sending of the corresponding priority queue The largest MAC-hs PDU of the window; or, the multiplexed PDU corresponds to the MAC-hs PDU of at least one priority queue specified in the priority queue, and the like. On the network side, the timing of stopping the retransmission of the multiplexed PDU is specified, and the retransmission of the multiplexed PDU is stopped at these occasions, thereby reducing the waste of resources, because at least one MAC-hs in the retransmitted multiplexed PDU is included. The PDU is valid, on the other hand, the transmission performance is guaranteed, and multiple valid MAC-hs PDUs in the multiplexed PDU are not retransmitted together because one MAC-hs PDU is invalid. It will be readily understood by those skilled in the art that other provisions may be made for the timing of stopping the retransmission of the PDU by the network side to ensure the performance of the data transmission without departing from the spirit of the present invention. In the third embodiment of the present invention, the UE supporting HADPA includes a receiving module for receiving a PDU, a demultiplexing module, at least one reordering queue and a window monitoring module, and a sliding window receiving processing module, and further includes a splitting unit and a record. Module and judgment module. The demultiplexing module is configured to: when the receiving module receives the multiplexed PDU multiplexed by the MAC-hs PDUs of the at least two priority queues on the network side, demultiplexing the multiplexed PDU to obtain at least one MAC-s PDU. At least one reordering queue for reordering MAC-hs PDUs. The window monitoring module is configured to monitor, during the first transmission to the correct reception, whether the moving distance of the receiving window of the reordering queue to which the MAC-hs PDU belongs is greater than or equal to a predetermined value, and if yes, discard the MAC-hs PDU. Wherein, the predetermined value is the maximum value of the TSN. The window monitoring module monitors whether the moving distance of the receiving window of the reordering queue to which the MAC-hs PDU belongs is smaller than the maximum value of the TSN by: when starting the first transmission, recording the upper edge position of the receiving window of each reordering queue at that time; Before the multiplexed PDU is correctly received, if the receiving window of each reordering queue moves forward and the upper edge thereof again equals or exceeds the corresponding recording position, the receiving window of the corresponding reordering queue has a moving distance overrun event; When the PDU is correctly received, if a moving distance overrun event occurs in the receiving window of the reordering queue to which the MAC-hs PDU belongs, it is determined that the moving distance of the receiving window is greater than or equal to the maximum value of the TSN, otherwise the receiving window is determined. The moving distance is less than the maximum value of TSN. When the receiving module correctly receives the MAC-hs PDU of a single priority queue, the MAC-hs The PDU is forwarded to the sliding window receiving processing module. The sliding window receiving processing module is configured to receive and process the MAC-hs PDU as follows:

A judges whether the SN of the MAC-hs PDU is within the receiving window of the reordering queue to which it belongs, and if yes, proceeds to step B, otherwise proceeds to step C; B determines whether the SN is smaller than the expected TSN or the TSN is the MAC of the SN- The hs PDU has been received, if yes, the MAC-hs PDU is discarded and proceeds to step D, otherwise the MAC-hs PDU is buffered according to the SN to the corresponding location in the reordering queue to which it belongs and proceeds to step D;

C buffers the MAC-hs PDU to the corresponding location in the reordering queue to which it belongs according to the SN, advances the upper edge of the receiving window of the reordering queue to the SN, and sets the TSN to be less than or equal to the lower edge of the receiving window. The MAC-hs PDU is removed from the reordering queue and output to the splitting unit, after which it is determined whether the desired TSN is smaller than the lower edge of the receiving window, and if so, the desired TSN is updated to the lower edge of the receiving window, and proceeds to step D;

如果符合预定条件的 MAC-hs PDU多于一个， 则该判断模块在所有符合 预定条件的 MAC-hs PDU都被要求停止重传时， 指示传输模块停止复用 PDU 的重传。 虽然通过参照本发明的某些优选实施方式，已经对本发明进行了图示和描 述，但本领域的普通技术人员应该明白，可以在形式上和细节上对其作各种改 变， 而不偏离本发明的精神和范围。 D determines whether the MAC-hs PDU corresponding to the desired TSN has been buffered in the reordering queue, and if so, outputs the MAC-PDUs from the expected TSN to the first MAC-hs PDUTSN that has not been received yet to The split unit sets the expected TSN to the TSN of the first MAC-hs PDU that has not been received. Among them, operations smaller than, equal to or greater than are performed in the manner of modulo N. In addition, the recording module is configured to record an upper edge position of the receiving window of each reordering queue at the time of the first transmission; and when the multiplexed PDU is correctly received, record a lower edge position of the receiving window of each reordering queue at the moment. The judging module is configured to obtain, from the recording module, an upper edge position of the receiving window of the reordering queue to which the first transmission moment MAC-hs PDU belongs, "W1, and receive the reordering queue to which the MAC-hs PDU belongs at the correct receiving time. The lower edge position W2 of the window; when the moving distance of the receiving window of the reordering queue to which the MAC-hs PDU belongs is less than a predetermined value, if the TSN of the MAC-hs PDU is in the manner of modulo N from W1 to W2 The MAC-hs PDU is discarded, and the MAC-hs PDU is transferred to the sliding window receiving processing module. In the Node B of the HSDPA according to the fourth embodiment of the present invention, the transport module for transmitting the PDU in the HARQ manner includes a determining module, configured to determine whether a MAC-hs PDU included in the multiplexed PDU that meets a predetermined condition is required to stop retransmission, if the transmitting module is instructed to stop retransmission of the multiplexed PDU. The conditional MAC-hs PDU is: multiplex all MAC-hs PDUs included in the PDU; or the lowest-priority MAC-hs PDU corresponding to the priority queue; or the maximum MAC- of the transmission window corresponding to the priority queue- Hs PDU; Who multiplex PDU corresponding to the priority queue specified at least one priority queue

If more than one MAC-hs PDU meets the predetermined condition, the judging module instructs the transmission module to stop retransmission of the multiplexed PDU when all the MAC-hs PDUs that meet the predetermined condition are required to stop retransmission. Although the invention has been illustrated and described with reference to the preferred embodiments of the present invention, it will be understood The spirit and scope of the invention.

Claims

Rights request  A data receiving method for high-speed downlink packet access, comprising the steps of: obtaining, by a user equipment, high-speed media access control by at least two priority queues on a network side When a multiplexed PDU is multiplexed with a MAC-hs protocol data unit PDU, it is demultiplexed to obtain a MAC-hs PDU of a single priority queue; from the first transmission to the correct reception of the multiplexed PDU, if the MAC If the moving distance of the receiving window of the reordering queue to which the -hs PDU belongs is greater than or equal to a predetermined value, the MAC-hs PDU is discarded. 2. The data receiving method of high speed downlink packet access according to claim 1, wherein the predetermined value is a maximum value N of a transmission sequence number of the MAC-hs PDU. The data receiving method for high-speed downlink packet access according to claim 2, wherein the step further comprises: obtaining a reordering queue to which the MAC-hs PDU belongs when transmitting the multiplexed PDU for the first time Receiving an upper edge position W1 of the window; before the multiplexed PDU is correctly received, if the current upper edge of the receiving window of the reordering queue to which the MAC-hs PDU belongs is equal to or exceeds the W1 again, the receiving window The moving distance is greater than or equal to the maximum value of the transmission sequence number. 4. The data receiving method for high speed downlink packet access according to claim 3, further comprising the steps of: obtaining a reordering queue receiving the MAC-hs PDU at the time of receiving the multiplexed PDU a lower edge position W2 of the window; when the moving distance of the receiving window of the reordering queue to which the MAC-hs PDU belongs is less than the predetermined value, if the transmission sequence number of the MAC-hs PDU is in the manner of modulo N The MAC-hs PDU is discarded from the value between W1 and W2, otherwise the MAC-hs PDU is received and processed in a sliding window manner. The data receiving method for high-speed downlink packet access according to claim 1, further comprising the step of: sliding if the user equipment correctly receives the MAC-hs PDU of the single priority queue The window mode receives and processes the MAC-hs PDU. 6. The data receiving method for high speed downlink packet access according to claim 5, wherein the sliding window mode receiving process comprises the following substeps: A when the transmission sequence number SN of the MAC-hs PDU is within the receiving window of the reordering queue to which it belongs, then proceeds to step B, otherwise proceeds to step C; B. When the SN is smaller than the expected transmission sequence number or the MAC-hs PDU whose transmission sequence number is SN has been received, the MAC-hs PDU is discarded and proceeds to step D, otherwise the MAC-lis PDU is buffered according to the SN. Corresponding position in the reordering queue to which it belongs and proceeds to step D; C buffering the MAC-hs PDU according to the SN to a corresponding position in the reordering queue to which the SN belongs, moving the upper edge of the receiving window of the reordering queue to the SN, and transmitting the sequence number is less than or equal to the receiving window. The lower edge MAC-hs PDU moves out of the reordering queue and outputs to the splitting unit. When the desired transmission sequence number is smaller than the lower edge of the receiving window, the desired transmission sequence number is updated to the receiving window. The lower edge of the mouth, and proceeds to step D; D. When the MAC-hs PDU corresponding to the desired transmission sequence number already exists in the reordering queue, the MAC number of the transmission sequence number from the desired transmission sequence number to the first MAC-hs PDU transmission sequence number that has not been received yet The hs PDUs are all output to the splitting unit, and the desired transmission sequence number is set to the transmission sequence number of the first MAC-hs PDU that has not been received; wherein the operations of less than, equal to or greater than are performed in the manner of modulo N. A data retransmission method for high speed downlink packet access, comprising the steps of: multiplexing, at a network side, a high speed medium access control MAC-hs protocol data unit PDU of at least two priority queues into a complex With the PDU, when the multiplexed PDU is retransmitted, if the multiplexed PDU contains the predetermined condition When the MAC-hs PDU is required to stop retransmission, the retransmission of the multiplexed PDU is stopped. The data retransmission method of the high speed downlink packet access according to claim 7, wherein the MAC-hs PDU that meets the predetermined condition is: all MAC-hs PDUs included in the multiplexed PDU Or the MAC-hs PDU with the lowest priority of the priority queue; or the MAC-hs PDU with the largest transmission window of the priority queue; or the multiplexed PDU corresponds to at least one of the priority specified in the priority queue. The MAC-hs PDU of the level queue. 9. The data retransmission method of high speed downlink packet access according to claim 8, characterized in that If the MAC-hs PDUs satisfying the predetermined condition are more than one, the multiplexed PDU stops retransmission when all MAC-hs PDUs that meet the predetermined condition are required to stop retransmission. 10. A high-speed downlink packet access user equipment, comprising: a receiving module for receiving a PDU, and a demultiplexing module, configured to receive, at the receiving module, a MAC-hs PDU of at least two priority queues by a network side When the multiplexed multiplexed PDU is multiplexed, the multiplexed PDU is demultiplexed to obtain at least one MAC-hs PDU; and at least one reordering queue is used for reordering the MAC-hs PDU; and the method further includes: a window monitoring module, configured to monitor whether a moving distance of a receiving window of the reordering queue to which the MAC-hs PDU belongs is greater than or equal to a predetermined value during a period from the first transmission to the correct reception of the multiplexing PDU, and if yes, discard the MAC-hs PDU. The high-speed downlink packet access user equipment according to claim 10, wherein the predetermined value is a maximum value of a transmission sequence number; and the user equipment further includes: a module of an upper edge position W1 of a receiving window of a reordering queue to which the MAC-hs PDU belongs; the window monitoring module monitors movement of a receiving window of a reordering queue to which the MAC-hs PDU belongs by: Whether the distance is smaller than the maximum value of the transmission sequence number: before the multiplexed PDU is correctly received, if the current upper edge of the receiving window of the reordering queue to which the MAC-hs PDU belongs is equal to or exceeds the W1 again, the receiving window The moving distance is greater than or equal to the maximum value of the transmission sequence number. 12. The user equipment of the high speed downlink packet access according to claim 11, further comprising a sliding window receiving processing module, configured to receive and process the MAC-hs PDU according to the following steps: A judges whether the transmission sequence number SN of the MAC-hs PDU is within the reception window of the reordering queue to which it belongs, and if yes, proceeds to step B, otherwise proceeds to step C; B determines whether the SN is smaller than the desired transmission sequence number or the transmission sequence number is The MAC-hs PDU of the SN has been received. If yes, the MAC-hs PDU is discarded and proceeds to step D. Otherwise, the MAC-hs PDU is buffered according to S to the corresponding position in the reordering queue to which it belongs and proceeds to the step. D; C buffers the MAC-hs PDU to the corresponding location in the reordering queue to which it belongs according to the SN, advances the upper edge of the receiving window of the reordering queue to the SN, and transmits the sequence number to be less than or equal to the lower edge of the receiving window. The MAC-hs PDU moves out of the reordering queue and outputs to the splitting unit, and thereafter determines whether the desired transmission sequence number is smaller than the lower edge of the receiving window, and if so, updates the desired transmission sequence number to the lower edge of the receiving window, and proceeds to the step D; D. judging whether the MAC-hs PDU corresponding to the desired transmission sequence number has been buffered in the reordering queue, and if so, transmitting the sequence number from the expected transmission sequence number to the first MAC-hs PDU transmission number that has not been received yet. The MAC-hs PDUs are all outputted to the splitting unit, and the desired transmission sequence number is set to the transmission sequence number of the first MAC-hs PDU that has not been received; wherein the operations of less than, equal to or greater than the modulo N are performed. The method performs: when the receiving module correctly receives the MAC-hs PDU of the single priority queue, the receiving module forwards the MAC-hs PDU to the sliding window receiving processing module. 13. The user equipment for high speed downlink packet access according to claim 11, wherein: The user equipment further includes: a module for obtaining a lower edge position W2 of a receiving window of the reordering queue to which the MAC-hs PDU belongs when the multiplex PDU is correctly received; the monitoring module obtains the W2, If the moving distance of the receiving window of the reordering queue to which the MAC-hs PDU belongs is less than the predetermined value, if the transmission sequence number of the MAC-hs PDU is in the manner of modulo N, from the W1 to the W2 If the value is between, the MAC-hs PDU is discarded, otherwise the MAC-hs PDU is transferred to the sliding window receiving processing module. A base station node for high speed downlink packet access, comprising: a multiplexing module, configured to multiplex a high speed medium access control MAC-hs protocol data unit PDU of at least two priority queues into a multiplexed PDU; And transmitting the PDU in a hybrid adaptive retransmission request manner, where the method further includes: a second determining module, configured to determine whether a MAC-hs PDU that meets a predetermined condition included in the multiplexed PDU is required to stop retransmission And if the transmission module is instructed to stop retransmission of the multiplexed PDU. The base station node of the high speed downlink packet access according to claim 14, wherein the MAC-hs PDU that meets a predetermined condition is: all MAC-hs PDUs included in the multiplexed PDU; or , the MAC-hs PDU with the lowest priority corresponding to the priority queue; or the MAC-hs PDU with the largest transmission window corresponding to the priority queue; or The multiplexed PDU corresponds to a MAC-hs PDU of at least one priority queue specified in the priority queue. 16. The base station node for high speed downlink packet access according to claim 14, wherein if the number of MAC-hs PDUs satisfying a predetermined condition is more than one, the second determining module is in all the conditions that meet the predetermined condition. When the MAC-hs PDU is required to stop retransmission, the transmission module is instructed to stop retransmission of the multiplexed PDU.