CN101034965B - Protocol data unit transmission method and system in high-speed downlink packet access - Google Patents

Abstract

The present invention relates to high-speed downlink packet access technology, and discloses a protocol data unit transmission method and system in high-speed downlink packet access, so that wireless network resources can be effectively utilized, and small packet services such as VoIP in each cell are improved user capacity. In the present invention, the MAC-hs PDUs of different UEs in the same UE group from the MAC-hs layer are multiplexed in a data transmission block of a TTI in the physical layer, and the data is transmitted through the group identifier of the UE group The block is sent to all UEs in the UE group. The header field of the data transmission block is used to indicate the UE to which the multiplexed MAC-hs PDU in the data transmission block belongs, the delimitation of the header and payload, and the delimitation and demultiplexing of the MAC-hs PDU. The UE judges whether it contains the MAC-hs PDU belonging to the UE according to the header field in the received data transmission block, and if so, demultiplexes the data transmission block to obtain its own MAC-hs PDU.

Description

Protocol data unit transmission method and system in high-speed downlink packet access

technical field

The invention relates to high-speed downlink packet access technology, in particular to protocol data unit transmission in high-speed downlink packet access.

Background technique

Universal Mobile Telecommunication System ("UMTS") is popular due to its powerful multimedia communication capabilities, high-speed data transmission rate and efficient spectrum utilization, and has become the development goal of future mobile communications. . One of the important features of the R5 version of UMTS technology is High Speed Downlink Packet Access (High Speed Downlink Packet Access, referred to as "HSDPA"), that is, through Adaptive Modulation and Coding (Adaptive Modulation and Coding, referred to as "AMC"), hybrid retransmission (Hybrid Automatic -Repeat-reQuest, referred to as "HARQ"), and a series of key technologies such as fast scheduling of base station nodes (Node B), realize downlink high-speed data transmission.

Those skilled in the art know that the air interface technology is a very important part of various mobile communication standards, which is specifically reflected in the physical channels formed by functional division and the transmission channels mapped thereto. The basic version of UMTS divides seven kinds of transmission channels and more than ten kinds of physical channels that are mapped or independent with them.

HSDPA downlink includes two physical channels, one is High Speed Physical Downlink Shared Channel (High Speed Physical Downlink Shared Channel, referred to as "HS-PDSCH"), which is used to carry user data information, and the other is High Speed Shared Control Channel (High Speed Shared ControlChannel , referred to as "HS-SCCH"), which is used to carry signaling required for demodulation of the accompanying data channel HS-PDSCH. In addition, HSDPA adds a high-speed dedicated physical control channel (HighSpeed-Dedicated Physical Control Channel, referred to as "HS-DPCCH") in the uplink, which is used to carry feedback on whether the downlink data frame is received correctly or not through the HS-PDSCH, or It is used to feed back a Channel Quality Indicator (CQI for short).

The UE knows whether there is data sent by the Node B on the corresponding HS-PDSCH through the HS-SCCH, and also obtains from the HS-SCCH the number of parallel code channels required for demodulating the HS-PDSCH, the corresponding spreading code, and the transmission Block size, modulation scheme and other transmission format and resource information, the Node B will know whether the data is received correctly through the HS-DPCCH, if it is not correct, it will initiate a retransmission, otherwise it will send new data.

Specifically, in each Transmission Time Interval (Transmission Time Interval, referred to as "TTI"), the HS-PDSCH can only transmit the data of one UE, and the UE judges the HS-PDSCH channel bearer of the corresponding TTI by monitoring the HS-SCCH. Whether it belongs to its own data. According to the 3GPP specification "TS 25.212, Multiplexing and channel coding (FDD)", the information carried by HS-SCCH includes: 7-bit channel code set information, 1-bit modulation scheme information, 6-bit transport block size information, 3 bits of HARQ process information, 3 bits of redundancy version and constellation diagram version information, 1 bit of new data indication and 16 bits of HS-DSCH Radio Network Temporary Identity (HS-DSCH Radio Network Temporary Identity, Abbreviated as "H-RNTI"). The UE judges whether the HS-PDSCH channel of the corresponding TTI carries its own data according to the 16-bit UE identifier H-RNTI carried on the HS-SCCH.

At the same time, the Medium Access Control (MAC) layer on the UE side and the Universal Mobile Telecommunications System Terrestrial Radio Access Network (UMTS Terrestrial Radio Access Network, UTRAN) side also adds high-speed media access control. (Medium AccessControl-high speed, referred to as "MAC-hs") sublayer to support HSDPA flow control, fast scheduling, priority management, HARQ and Transport Format and Resource Indicator (Transport Format and ResourceIndicator, referred to as "TFRI") selection. MAC-hs is located under another sublayer MAC-d (d refers to dedicated) of the MAC layer and above the physical layer. Figure 1 and Figure 2 show the structure of the MAC-hs on the UTRAN side and the UE side respectively.

As shown in Figure 1, after the MAC-d flow from each UE in the Radio Network Controller (Radio Network Controller, referred to as "RNC") enters the MAC-hs entity in the Node B, the priority queue allocation unit first uses the MAC- The priority of the MAC-d Protocol Data Unit (Protocol DataUnit, referred to as "PDU") on the d flow, the data packets are allocated to different priority queues for buffering, and wait for Node B scheduling, so that the high-speed downlink shared channel (High Speed Downlink SharedChannel, referred to as "HS-DSCH"). Among them, the data packets in each priority queue are MAC-d PDUs with the same priority of the same UE, and their sizes are different.

The Node B schedules the data transmission of each priority queue of each UE in each TTI, that is, the Node B selects a certain number of MAC-d PDUs in a certain priority queue of a certain UE according to a certain scheduling algorithm in the current TTI The selected MAC-d PDU will be multiplexed to form a MAC-hs PDU, and then handed over to the HARQ entity for transmission through a certain HARQ process of the UE. A UE can have up to 8 independent The HARQ process. The transport format resource combination (TFRC) selection unit is responsible for selecting the transmission formats and resources used for transmission on the HS-DSCH, including the number of parallel code channels and corresponding spreading codes, transmission block sizes, and modulation schemes.

Among them, the format of the MAC-hs PDU is shown in Figure 3. The header of the MAC-hs PDU includes a version flag (VF), a queue number (Queue ID), a transmission sequence number (TSN), and a MAC-d PDU length indication (SID). , MAC-d PDU number N and flag F and other fields. Among them, the length of the VF field is 1 bit, which is used to identify the version of the MAC-hs PDU, and the version number of the current protocol is 0; the length of the Queue ID field is 3 bits, which is used to identify the MAC-hs PDU of the same priority queue; the TSN field The length is 6 bits, which is used to identify the sequence number of the MAC-hs PDU, so that the receiving end can restore the original MAC-hs PDU sequence according to the sequence number; the length of the SID field is 3 bits, which is used to indicate that the sequence of the same size is concatenated together The length of the MAC-d PDU; the length of the N field is 7 bits, indicating the number of MAC-d PDUs of the same size that are concatenated together. The payload part of the MAC-hs PDU is multiplexed by multiple MAC-hs SDUs, that is, MAC-d PDUs. Since there may be multiple MAC-d PDUs with the same priority but different sizes in the same priority queue, therefore MAC-d PDUs multiplexed on MAC-hs PDUs may have various lengths. In the payload part of the MAC-hs PDU, MAC-d PDUs of the same length are sequentially concatenated together, and the size and the number of concatenated MAC-dPDUs are determined by the corresponding SID and N field identifier. The F field with a length of 1 bit indicates whether the follow-up is the SID and N field identifier corresponding to another size of MAC-d PDU, wherein, if the F field is "0", it means that the follow-up is another size of MAC-d PDU. The SID and N field identification corresponding to the dPDU, if the field is "1", it means the end of the MAC-hs PDU header, that is, the follow-up is the payload part of the MAC-hs PDU.

In one TTI, the Node B multiplexes multiple MAC-d PDUs in the priority queue specified by a certain UE according to the format of the MAC-hs PDU to form a MAC-hs PDU, and then hands it over to the HARQ entity, through a certain HARQ of the UE. The procedure is transmitted to the UE.

On the UE side, as shown in Figure 2, the MAC-hs entity on the UE side sends the MAC-hs PDU from the HS-DSCH channel to the HARQ entity first, and the HARQ entity on the UE side is the receiver of the HARQ entity on the UTRAN side, responsible for Complete operations such as generating correct acknowledgment (ACK)/wrong acknowledgment (NACK), HARQ soft combining, etc. After HARQ processing, the reordering queue unit allocates the MAC-hs PDU to the corresponding MAC-hs PDU header according to the Queue ID field Reordering queue, and in the reordering queue, each MAC-hs PDU is reordered according to the TSN field of each MAC-hs PDU header, thereby restoring the original data packet order, and finally, the MAC-hs PDU that has restored the original order The hs PDU is sent to the disassembly unit, and the disassembly unit disassembles each MAC-d PDU from the payload part of the MAC-hs PDU according to the SID, N and F fields of the MAC-hs PDU header and sends them to the MAC-d entity .

Due to the obvious advantages of high downlink transmission rate and small transmission delay, HSDPA is used by more and more businesses. Voice over packet (Voice over IP, referred to as "VoIP") technology is one of the typical applications.

At present, according to the 3GPP specification "TS 25.212, Multiplexing and channel coding", the network side will select a certain number of MAC-d PDUs in a certain priority queue of a certain UE according to a certain scheduling algorithm, and send them to the MAC-hs Layer multiplexing forms a MAC-hs PDU, and after the MAC-hsPDU enters the physical layer, a 24-bit cyclic redundancy check (Cyclic Redundancy Check, referred to as "CRC") is added, and then channel coding, interleaving and constellation Map mapping and other operations, as shown in Figure 4; or, in the MAC-hs layer, the MAC-hs PDU and the MAC-hs PDU of other priority queues of the UE are multiplexed into a MAC-hs PDU again, the same , after the MAC-hs PDU enters the physical layer, a 24-bit CRC is attached, and then channel coding, interleaving, and constellation map mapping are performed. The network side sends the data transmission block finally formed on the physical layer to the UE through one TTI.

After the UE receives the data transmission block sent by the network side, it performs reception processing such as demodulation and channel decoding, and performs CRC check on the decoded data transmission block at the physical layer, and notifies the MAC-hs of the UE of the check result Layer HARQ entity, the HARQ entity determines whether to request the network side to retransmit the data transmission block and control the corresponding HARQ soft combination according to the CRC check result, unless the HARQ retransmission exceeds a certain number of times, otherwise, only when the CRC check is correct , the physical layer of the UE sends the correctly decoded MAC-hs PDU to the MAC-hs layer of the UE.

In practical application, the above solution has the following problem: wireless network resources cannot be fully utilized.

The main reason for this situation is that in the prior art, HSDPA can only transmit the MAC-hs PDU in one UE in one TTI, and because the data flow rate of VoIP on different MAC-hs priority queues is very high Low, even if the MAC-hs PDU is formed after multiplexing PDUs of different priority queues, it may still not be able to fully utilize the transmission bandwidth of HSDPA, resulting in a large amount of remaining transmission bandwidth that cannot be used, and at the same time, there are still There are many other problems with UEs using VoIP services waiting to transmit data.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a protocol data unit transmission method and system in high-speed downlink packet access, so that wireless network resources can be effectively used, and improve the VoIP and other small packet service users in each cell. capacity.

In order to achieve the above object, the present invention provides a protocol data unit transmission method in high-speed downlink packet access, comprising the following steps:

A sets at least two user equipments as a user equipment group, and assigns a group identifier to it;

The B network side multiplexes the protocol data units of at least two high-speed media access control layers belonging to the same user equipment group in a data transmission block of a transmission time interval of the shared physical channel, and indicates the transmission with the group identifier Attribution of data in time intervals;

C. The user equipment receives the data transmission block in the corresponding transmission time interval from the shared physical channel according to the group identifier, and obtains the protocol data unit belonging to the user equipment after demultiplexing it.

Wherein, the data transmission block includes a header and a payload part;

The payload includes each of the protocol data units belonging to the same user equipment group;

The header includes information indicating the user equipment to which each protocol data unit in the payload belongs, the delimitation information between the header and the payload, and the delimitation and demultiplexing information of each protocol data unit in the payload .

In addition, in the method, the payload also includes a cyclic redundancy check code of each of the protocol data units, which is used to detect the correctness of the protocol data units at the user equipment side, and each of the protocol data units and Its cyclic redundancy check code exists in the payload in a concatenated manner.

In addition, in the method, the header further includes a cyclic redundancy check code, which is used to check the correctness of the header at the user equipment side.

Also in the method, the header uses redundant coding.

In addition, in the method, the shared physical channel is a high-speed physical downlink shared channel;

The channel for transmitting the group identifier is a high-speed shared control channel.

In addition, in the method, the group identifier is a temporary identifier of the high-speed downlink shared channel wireless network.

In addition, in the method, all user equipments in the user equipment group upload and receive the data transmission block and whether the decomposed protocol data unit belonging to the user equipment is correct or not and a channel quality indication to the network side;

If the network side receives a non-confirmation response message, the network side continues to retransmit the data transmission block until receiving confirmation response messages from all user equipments in the user equipment group;

The network side schedules and allocates radio resources according to the channel quality indication value indicating the lowest rate among the channel quality indications fed back by each user equipment in the same user equipment group.

In addition, in the method, if the user equipment receives a retransmitted data transmission block, and the data transmission block and the protocol data unit belonging to the user equipment in the data transmission block have been correctly received before, then ignore the retransmission Processing of data transfer blocks.

The present invention also provides a protocol data unit transmission system in high-speed downlink packet access, the network side and the user equipment respectively include a physical layer and a media access layer, and the physical layer on the network side includes:

The multiplexing module is used to multiplex the protocol data units of at least two high-speed media access control layers belonging to the same user equipment group in a data transmission block of a transmission time interval of the shared physical channel;

A sending module, configured to send the data transmission block generated by the multiplexing module on the shared physical channel, and use the group identifier to indicate the ownership of the data in the transmission time interval;

The physical layer of the user equipment includes:

a receiving module, configured to receive a data transmission block in a corresponding transmission time interval from the shared physical channel according to the group identifier,

The demultiplexing module is configured to demultiplex the data transmission block received by the receiving module and obtain the protocol data unit belonging to the user equipment therefrom.

Wherein, the data transmission block includes a header and a payload part; the payload includes each of the protocol data units belonging to the same user equipment group; the header includes an indication of each protocol data unit in the payload The information of the user equipment to which it belongs, the delimitation information of the header and the payload, and the delimitation and demultiplexing information of each protocol data unit in the payload.

By comparison, it can be found that the main difference between the technical solution of the present invention and the prior art is that in the physical layer, the MAC-hs PDUs of different UEs in the same UE group from the MAC-hs layer are multiplexed in the data transmission of one TTI block, and send the data transmission block to all UEs in the UE group through the group identifier of the UE group. Use the header field of the data transmission block to indicate the UE to which the MAC-hs PDU multiplexed in the data transmission block belongs, the delimitation of the header and the payload, and the delimitation and demultiplexing of the MAC-hs PDU, so that the UE It can judge whether it contains the MAC-hs PDU belonging to the UE according to the header field in the received data transmission block, and if so, further demultiplex the data transmission block to obtain its own MAC-hs PDU . By adding CRC to the header field and the MAC-hs PDU of each UE, it is ensured that the UE can successfully decompose its own MAC-hs PDU from the received data transmission block, and obtain the correct MAC-hs PDU. Thus, the multiplexing of multiple UEs on the HSDPA channel is realized.

Further, the PDUs in different priority queues of the same UE can be multiplexed into one MAC-hs PDU of the UE in the MAC-hs layer, and then the same UE group from the MAC-hs layer can be multiplexed in the physical layer The MAC-hs PDUs of different UEs are multiplexed in one data transmission block, so as to realize the PDU multiplexing of multiple users and multiple queues, and effectively solve the problem of low-rate small packet services such as VoIP in different MAC-hs priority queues. The HSDPA transmission bandwidth cannot be fully utilized due to the low data flow rate on the Internet, thus improving the utilization rate of wireless network resources when transmitting VoIP and other low-rate small packet services in HSDPA, and further expanding the VoIP and other small packets of each cell. Capacity for business users.

Different UEs in the same UE group independently feed back CQI and ACK/NACK through their respective HS-DPCCH channels, and the Node B will continue to retransmit until receiving ACK responses from all UEs in the UE group; UEs in the same UE group are receiving After arriving at the correct data transmission block and decomposing the correct MAC-hs PDU of the UE, ignore the subsequent retransmission of the same data transmission block. Node B receives the CQI on the HS-DPCCH channel of all UEs in the UE group, and schedules and allocates radio resources according to the CQI value indicating the lowest rate, so as to ensure that all UEs in the UE group can receive it effectively.

Description of drawings

FIG. 1 is a schematic structural diagram of a MAC-hs entity on the UTRAN side in the prior art;

FIG. 2 is a schematic structural diagram of a UE-side MAC-hs entity in the prior art;

Fig. 3 is the structural representation of the MAC-hs PDU of same priority queue in the prior art;

Fig. 4 is the flowchart of the physical layer processing MAC-hs PDU of network side in the prior art;

Fig. 5 is a PDU transmission system structural diagram in HSDPA according to the first embodiment of the present invention;

FIG. 6 is a flow chart of a PDU transmission method in HSDPA according to a first embodiment of the present invention;

Fig. 7 is the structural diagram of the data transmission block of the PDU transmission method in HSDPA according to the first embodiment of the present invention;

FIG. 8 is a flowchart of MAC-hsPDU multiplexing of the PDU transmission method in HSDPA according to the first embodiment of the present invention;

FIG. 9 is a structural diagram of concatenated MAC-hs PDUs of the PDU transmission method in HSDPA according to the second embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

The core of the present invention is to group UEs. Each UE group contains at least two UEs and assigns a group identifier to the UE group. In the physical layer, the network side combines different UEs in the same UE group from the MAC-hs layer. The MAC-hs PDU of the shared physical channel is multiplexed in the data transmission block of a TTI of the shared physical channel, and the attribution of the data in the TTI is indicated through the group identifier of the UE group, so that all UEs in the UE group can receive data from the shared physical channel The data transmission block in the corresponding TTI is demultiplexed to obtain the PDU belonging to the UE.

The core of the present invention has been introduced above, and the structure of the PDU transmission system in HSDPA according to the first embodiment of the present invention will be described below.

As shown in FIG. 5 , the network side and the UE side respectively include a physical layer and a MAC layer.

The physical layer on the network side also includes a multiplexing module and a sending module. Wherein, the multiplexing module is used to multiplex at least two MAC-hs PDUs belonging to the same UE group in a data transmission block of one TTI of the shared physical channel, and the sending module is used to send the data generated by the multiplexing module on the shared physical channel The data transmission block, and indicates the attribution of the data in the TTI with the UE group identifier, that is, which UE group the data transmitted in the TTI belongs to.

The physical layer on the UE side also includes a receiving module and a demultiplexing module. Wherein, the receiving module is used for receiving the data transmission block in the corresponding TTI from the shared physical channel according to the group identifier of the UE group to which the UE belongs, and the demultiplexing module is used for demultiplexing the data transmission block received by the receiving module and obtaining therefrom PDUs belonging to the UE, and send the obtained PDUs to the MAC layer of the UE.

The PDU transmission method in HSDPA according to the first embodiment of the present invention is shown in FIG. 6 .

In step 610, the network side sets up a UE group and assigns it a group identifier. Specifically, when the UE establishes a wireless link with the network side, the network side sets at least two UEs as a UE group, and assigns a group identifier to each UE group. That is to say, for a UE belonging to at least one UE group, at least one group identifier assigned by the system and the H-RNTI used to identify the UE itself will be obtained. If the group identifier is also an H-RNTI, then, for the As far as the UE is concerned, at least two H-RNTIs allocated by the system will be obtained, one is used to identify the UE group to which the UE belongs, and the other is used to identify the UE itself.

Then, enter step 620, the network side multiplexes the MAC-hs PDUs of each UE in the UE group into one data transmission block and delivers it. Specifically, the network side multiplexes at least two MAC-hs PDUs belonging to the same UE group in the data transmission block of one TTI of the shared physical channel, and sends them in the group set for the UE group in step 610. The ID indicates which UE group the data transmitted in the TTI belongs to. In this embodiment, the data transmission block is delivered through the HS-PDSCH, and the group identifier of the UE group is transmitted through the HS-SCCH.

Wherein, the structure of the data transmission block is shown in FIG. 7 , which includes a header and a payload. The payload part is used to include each PDU belonging to the same UE group and the CRC of the PDU, so that the UE side can detect the correctness of the transmission of the PDU, and each PDU and its CRC exist in the payload part in a concatenated manner. The header part is used to contain information indicating the UE to which each PDU in the payload belongs, the delimitation information of the header and the payload, and the delimitation and demultiplexing information of each PDU in the payload, so that the UE receives the data After the transmission block, the PDU belonging to the UE and the CRC of the PDU can be successfully decomposed, and the header part also needs to include the CRC of the header information, so that the UE side can detect the correctness of the information in the header.

The process of multiplexing at least two MAC-hs PDUs belonging to the same UE group in the data transmission block of one TTI of the shared physical channel on the network side is shown in Figure 8.

In step 810, the physical layer on the network side adds the CRC of the PDU to the PDU of each UE in the same UE group from the MAC-hs layer, so as to ensure that the UE can detect whether the decomposed PDU has an error during transmission .

Next, in step 820, the physical layer on the network side generates header information, which includes information indicating the UE to which each PDU belongs, delimitation information of the header and payload, and delimitation information of each PDU in the payload and demultiplexing information.

In step 830, the physical layer on the network side adds CRC to the header information and performs redundant coding. This is because, if the method of multiplexing MAC-hs PDUs at the physical layer is used, the multiplexed header fields have higher accuracy requirements, otherwise it will not be able to clean the header fields due to transmission errors However, the block error rate of HSDPA physical layer transmission itself is relatively high. Therefore, it is necessary to add CRC to the header information before performing redundant coding. Preferably, block coding or repeated coding can be used. way to improve the correctness of header information.

Next, in step 840, operations such as channel coding, interleaving, and constellation map mapping are performed on the multiplexed data transmission block, and then sent to the spread spectrum modulation unit.

After the network side multiplexes the MAC-hs PDUs of each UE in the UE group into a data transmission block and delivers it, it enters step 630, and the UE judges whether the header of the received data transmission block is correct. Specifically, if the network side sends the data transmission block through the HS-PDSCH, each UE on the UE side receives the corresponding data transmission block according to the group identifier on the HS-SCCH indicating that the data transmission block in the TTI belongs to. And after the data transmission block is processed by demodulation, channel decoding, etc., the CRC verification is performed on the head of the data transmission block to detect whether the data transmission block has an error during transmission. If the verification is successful, that is, the header of the data transmission block is transmitted correctly, then go to step 640 , otherwise go to step 650 .

In step 640, the UE receiving the data transmission block further judges whether the decomposed PDU belonging to the UE is transmitted correctly. Specifically, when each UE on the UE side receives the corresponding data transmission block according to the group identifier it belongs to and the header of the data transmission block is transmitted correctly, it decomposes its own PDU and the PDU according to the information contained in the header. After the CRC of the PDU, perform CRC verification on its own PDU to detect whether there is an error in the transmission process of its own PDU. If the verification is successful, send the correctly decoded PDU to the MAC-hs layer of the UE and enter step 660, or if the UE finds that the data transmission block does not contain its own PDU through the header information, then directly enter step 660 660, otherwise, go to step 650.

In step 650, that is, when the header of the data transmission block received by the UE or its own PDU decomposed from the data transmission block is incorrect, the UE uploads the PDU generated by the MAC-hs layer HARQ entity of the UE to the network side. A NACK replies to request retransmission of the data transport block, along with the corresponding CQI.

In step 660, that is, when the header of the data transmission block received by the UE is correct, and its own PDU decomposed from the data transmission block is also correct, or the data transmission block does not contain its own PDU, the UE sends a message to the network The side uploads the ACK response generated by the MAC-hs layer HARQ entity of the UE and the corresponding CQI.

Then, enter step 670, the network side schedules and allocates radio resources according to the CQI value indicating the lowest rate among the CQIs returned by each UE, and judges whether ACK responses from all UEs in the UE group to which the data transmission block belongs are received. If not, go to step 680.

In step 680, the network side retransmits the data transmission block until receiving ACK responses from all UEs in the UE group to which the data transmission block belongs, so as to ensure that all UEs in the UE group to which the data transmission block belongs can effectively receive the data transmission block. Data transfer block. For the UE that has correctly received the data transmission block and successfully decomposed its own PDU from it, or knows that the data transmission block does not contain its own PDU, if the retransmitted data transmission block is received, then The processing of the retransmitted data transmission block is ignored.

In this embodiment, the physical layer on the network side multiplexes the MAC-hs PDUs of different UEs in the same UE group from the MAC-hs layer into one data transmission block, and transmits the data through the group identifier of the UE group The transport block is sent to all UEs in the UE group, realizing the multiplexing of multiple UEs on the HSDPA channel.

The second embodiment of the present invention is roughly the same as the first embodiment, the only difference is that in the first embodiment, the PDUs from the MAC-hs layer are PDUs of the same priority of the same UE, while in this embodiment , the PDUs from the MAC-hs layer are PDUs of the same UE that are multiplexed with PDUs of different priorities, and its structure is shown in FIG. 9 . That is, the MAC-hs PDUs of multiple priority queues of the same UE are concatenated, and all possible padding fields are placed after all concatenated MAC-hs PDUs. In order to distinguish the padding bits from the MAC-hs PDU, an optional padding pointer field is added at the end of the entire concatenated MAC-hs PDU to indicate the start position of the padding field, and a fixed padding pointer (PF) is used to indicate whether it exists Populate the pointer field. In the process of cascading, if the number of bits that needs to be filled is less than 21 bits, then no filling pointer field will be generated but only the filling field, and the filling pointer flag will be set at the same time to indicate that there is no filling pointer field; if the number of bits that needs to be filled is equal to or greater than 21 bits, then generate a padding pointer field to indicate the start position of the padding field, and set the padding pointer flag to indicate the existence of the padding pointer field.

In this embodiment, by further multiplexing the PDUs in different priority queues of the same UE into one MAC-hs PDU of the UE in the MAC-hs layer, and then multiplexing the PDUs from the MAC-hs layer in the physical layer The MAC-hs PDUs of different UEs in the same UE group are multiplexed in one TTI data transmission block, thereby realizing multi-user and multi-queue PDU multiplexing, effectively solving the problem of low-rate small packet services such as VoIP in different The low rate of data flow on the MAC-hs priority queue leads to the problem that the transmission bandwidth of HSDPA cannot be fully utilized, thus improving the utilization rate of wireless network resources when transmitting VoIP and other low-rate small packet services in HSDPA, and further expanding each capacity of VoIP and other small packet service users in a cell.

Although the present invention has been illustrated and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the present invention. The spirit and scope of the invention.

Claims (9)

1. protocol Data Unit transmission method during a high speed downlink packet inserts is characterized in that, comprises following steps:

At least two subscriber equipmenies of A are set to a group of user equipments, for it distributes a group id;

The B network side will belong to that the protocol Data Unit of at least two high speed media MAC layers of same group of user equipments is multiplexing to issue in the data transmission block of a Transmission Time Interval sharing physical channel, and will indicate the ownership of data in this Transmission Time Interval with described group id;

The described subscriber equipment of C is collected the data transmission block of respective transmissions the time interval according to described group id from described shared physical channel, to therefrom obtaining the protocol Data Unit that belongs to this subscriber equipment behind its demultiplexing;

Wherein, described data transmission block comprises head and payload part;

Comprise each the described protocol Data Unit that belongs to same group of user equipments in the described payload;

Comprise the demarcation information of information, this head and the payload of the subscriber equipment under each protocol Data Unit in the described payload of indication and the demarcation of interior each protocol Data Unit of this payload in the described head and conciliate multiplexed information.

2. protocol Data Unit transmission method during high speed downlink packet according to claim 1 inserts, it is characterized in that, the cyclic redundancy check (CRC) code that also comprises each described protocol Data Unit in the described payload, be used for detecting in user equipment side the correctness of this protocol Data Unit, each described protocol Data Unit and cyclic redundancy check (CRC) code thereof are present in the described payload with cascade system.

3. protocol Data Unit transmission method during high speed downlink packet according to claim 1 inserts is characterized in that described head also comprises cyclic redundancy check (CRC) code, is used for detecting in user equipment side the correctness of this head.

4. protocol Data Unit transmission method during high speed downlink packet according to claim 3 inserts is characterized in that, described head uses redundancy encoding.

5. according to protocol Data Unit transmission method during each described high speed downlink packet inserts in the claim 1 to 4, it is characterized in that described shared physical channel is a high-speed physical downlink shared channel (HS-PDSCH);

The channel that transmits described group id is a High-Speed Shared Control Channel.

6. protocol Data Unit transmission method during high speed downlink packet according to claim 5 inserts is characterized in that described group id is the high-speed downlink shared channel Radio Network Temporary Identifier.

7. protocol Data Unit transmission method during high speed downlink packet according to claim 5 inserts, it is characterized in that all subscriber equipmenies in the described group of user equipments are uploaded the protocol Data Unit that belongs to this subscriber equipment that receives described data transmission block and decomposite to network side, and whether correct response message and channel quality indicated;

Do not confirm response message if described network side has received, then network side continues to retransmit this data transmission block, the affirmation response message of all subscriber equipmenies in receiving this group of user equipments;

In the channel quality indication of described network side according to each subscriber equipment feedback in the same group of user equipments, the channel quality indicated value of indication minimum speed limit is dispatched and distributing radio resource.

8. protocol Data Unit transmission method during high speed downlink packet according to claim 7 inserts, it is characterized in that, if described subscriber equipment has been received the data transmission block that retransmits, and this data transmission block and in belong to this subscriber equipment protocol Data Unit correctly received before this, then ignore processing to the data transmission block of this re-transmission.

9. protocol Data Unit transmission system during a high speed downlink packet inserts comprises physical layer and medium Access Layer respectively in network side and the subscriber equipment, it is characterized in that the physical layer of described network side comprises:

Multiplexing module is used for and will belongs to the multiplexing data transmission block at a Transmission Time Interval sharing physical channel of protocol Data Unit of at least two high speed media MAC layers of same group of user equipments;

Sending module is used for sharing the data transmission block that physical channel sends described Multiplexing module generation, and indicates the ownership of data in this Transmission Time Interval with group id;

The physical layer of described subscriber equipment comprises:

Receiver module is used for collecting the data transmission block in the respective transmissions time interval according to described group id from described shared physical channel,

Demultiplexing module is used for the data transmission block that described receiver module receives is carried out therefrom obtaining the protocol Data Unit that belongs to this subscriber equipment behind the demultiplexing;

Wherein, described data transmission block comprises head and payload part;

Comprise each the described protocol Data Unit that belongs to same group of user equipments in the described payload;

Comprise the demarcation information of information, this head and the payload of the subscriber equipment under each protocol Data Unit in the described payload of indication and the demarcation of interior each protocol Data Unit of this payload in the described head and conciliate multiplexed information.

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