WO2009152673A1

WO2009152673A1 - A method and a system for implementing the uplink hybrid automatic retransmission request

Info

Publication number: WO2009152673A1
Application number: PCT/CN2008/073526
Authority: WO
Inventors: 王军虎; 孙长印; 王文焕
Original assignee: 刘建
Priority date: 2008-06-19
Filing date: 2008-12-16
Publication date: 2009-12-23
Also published as: CN101610138A; CN101610138B

Abstract

A method and a system for implementing the uplink Hybrid Automatic Retransmission Request are provided, wherein the method includes: a mobile station sends data to a base station by the preset uplink synchronous HARQ sub-frames and/or uplink asynchronous HARQ sub-frames. By using the scheme, a fixed RTT can be remained, the overhead of the system is reduced, a shorter RTT is remained, and a flexible scheduling is also supported.

Description

The present invention relates to the field of communications, and in particular, to a method and system for implementing an uplink hybrid automatic repeat request. BACKGROUND Hybrid Automatic Retransmission Request (HARQ) is a technology proposed to overcome the influence of wireless mobile channel time-varying and multipath fading on signal transmission. The combination of Automatic Retransmission Request (ARQ) and Forward Error Correction (FEC) is used in combination. HARQ technology enables wireless mobile communication systems to achieve higher system throughput and higher system stability, and is one of the key technologies in the 3G Long Term Evolution (LTE) system. In the HARQ technique, ARQ is combined with FEC to include error correction and error detection parity bits in each data packet transmitted. If the number of error bits in the received packet is within the error correction capability, the error is corrected by the FEC itself, and no ARQ is needed. When the error is serious and the error correction capability of the FEC has been exceeded, the ARQ feedback is sent to notify the originating retransmission. . Thereby, additional signal-to-noise ratio gain can be obtained, and time diversity effects are generated by the combination of data packets, thereby improving the throughput and performance of the system. According to the current two classification criteria, the implementation of HARQ can be divided as follows: First, according to the time of retransmission, HARQ can be divided into synchronous HARQ and asynchronous HARQ, where synchronous HARQ refers to a The transmission (retransmission) of the HARQ process occurs at a fixed time. Since the receiving end knows the time of transmission in advance, no additional signaling overhead is needed to identify the sequence number of the HARQ process. The sequence number of the HARQ process at this time can be from the subframe number. Acquired; Asynchronous HARQ means that the transmission (retransmission) of a HARQ process can occur at any time, and the receiving end does not know the occurrence time of the transmission in advance, so the processing sequence number of the HARQ process needs to be sent together with the data; Second, according to the retransmission format To distinguish, HARQ can be divided into two modes: adaptive HARQ and non-adaptive HARQ. The retransmission format includes modulation and coding, resource division, and retransmission. Interval, specifically, adaptive HARQ means: In each retransmission process, the transmitting end can change part of the transmission parameters according to the actual channel state information, so in each transmission process, the control signaling information including the transmission parameters To be sent together; non-adaptive HARQ means: These transmission parameters are known in advance with respect to the receiving end, so there is no need to transmit control signaling information including transmission parameters. It can be seen that synchronous non-adaptive HARQ has the advantage of saving signaling overhead; while asynchronous adaptive HARQ needs to be the same as the first transmission overhead for each retransmission. For some services, for example, a Voice Over Internet Protocol (VoIP) service requires a small retransmission interval and a small amount of traffic each time. Therefore, if each retransmission takes up the same overhead, that is, By using the asynchronous adaptive HARQ method, the utilization efficiency of the frequency is relatively low. Assume that the signaling bits such as resource assignments in a single transmission are M, the number of HARQ processes is N, and the average number of retransmissions is P, then the overhead required for asynchronous adaptive HARQ is N*M*P, and correspondingly, the synchronization is not The overhead required for adaptive HARQ is N*M, which reduces (P _ 1 ) *N*M. Therefore, synchronous non-adaptive HARQ has the advantages of significantly reducing overhead and simplifying system complexity, and is suitable for services with small delay requirements and relatively small transmission load. In addition, asynchronous HARQ has no strict time requirements for retransmission time, so it can flexibly schedule services with higher priority levels without conflicts. Asynchronous adaptation can adaptively adjust the modulation and coding mode, resource allocation, etc. of the retransmitted data packet according to the channel quality, and can also obtain the scheduling gain. At the same time, asynchronous HARQ requires signaling overhead for each transmission, which enhances the reliability of transmission. For example, when the transmitting end receives an ACK/NACK (correct response/error response) feedback message incorrectly, because the information indicates whether it is new data during transmission, the receiving end can still know whether to retransmit data or new data, and each time The resource carries the resource assignment information to ensure that the receiver can receive at the correct location. However, since the uplink and downlink transmissions are independent of each other, it is currently impossible to combine asynchronous HARQ and synchronous non-adaptive HARQ for uplink transmission. SUMMARY OF THE INVENTION The present invention has been made in view of the inability in the prior art to implement the problem of using asynchronous HARQ and synchronous non-adaptive HARQ in combination for uplink transmission. To this end, the main object of the present invention is to provide an uplink hybrid automatic repeat request. The implementation mechanism is to perform uplink transmission in combination with asynchronous HARQ and synchronous non-adaptive HARQ. According to an aspect of the present invention, a method for implementing a square uplink hybrid automatic repeat request is provided, which is applied to a time division duplex orthogonal frequency division multiplexing system including a base station and a terminal. The method includes: the mobile station transmitting data to the base station by using a preset uplink synchronization hybrid automatic repeat request subframe and/or an uplink asynchronous hybrid automatic repeat request subframe. The method may further include: before the mobile station sends data to the base station by using an uplink synchronization hybrid automatic repeat request subframe and/or an asynchronous hybrid automatic repeat request subframe, the method further includes: the base station mixing the uplink synchronization automatic retransmission request subframe The information and/or the information of the asynchronous hybrid automatic repeat request subframe is notified to the mobile station, where the information of the uplink synchronous hybrid automatic repeat request subframe includes the number and location of the uplink synchronous hybrid automatic repeat request subframe, and the uplink asynchronous hybrid automatic The information of the retransmission request subframe includes the number and location of the uplink asynchronous hybrid automatic repeat request subframe. And, in the case that the information of the uplink synchronization hybrid automatic repeat request subframe and/or the information of the asynchronous hybrid automatic repeat request subframe change, the base station changes the information of the changed uplink synchronization hybrid automatic repeat request subframe. And/or the information of the asynchronous hybrid automatic repeat request subframe is notified to the mobile station, where the manner of notification includes any one of broadcast, multicast, unicast or a combination thereof. The mobile station selects a subframe of the synchronous hybrid automatic retransmission in the predetermined maximum synchronous hybrid automatic retransmission area, where the maximum synchronous hybrid automatic retransmission area is such that the retransmission interval of the hybrid automatic retransmission is the maximum of one radio frame. The sub-frame area, wherein the data sent on each sub-frame can be re-transmitted at the corresponding position of the next radio frame, while allowing the processing of the isochronous condition. Furthermore, in the case that the mobile station transmits data to the base station by using the uplink synchronization hybrid automatic repeat request subframe, the method further includes: the base station replies to the mobile station with the uplink synchronization hybrid automatic repeat request subframe by using the downlink subframe. Reply message. The response message and the uplink synchronization hybrid automatic repeat request subframe are separated by at least 2 subframes. In addition, in the case that the response message is an error response message, the method may further include: the mobile station retransmitting the uplink synchronization hybrid automatic retransmission in a corresponding position of the next radio frame of the radio frame in which the uplink synchronization hybrid automatic repeat request subframe is located. Request data. And, the response message and the retransmitted uplink synchronization hybrid automatic retransmission request data have a subframe interval of at least 2 subframes. Preferably, the mobile station transmits data to the base station by using an uplink synchronization hybrid automatic repeat request subframe. The method may further include: the mobile station transmitting data to the base station by using a synchronous hybrid automatic repeat request process of the radio frame, where the synchronous hybrid automatic repeat request process includes an uplink synchronous hybrid automatic repeat request subframe, or A plurality of consecutive or discontinuous uplink synchronous hybrid automatic repeat request subframes are included. On the other hand, in a case where the mobile station sends data to the base station through the uplink asynchronous hybrid automatic repeat request subframe, the method may further include: the base station replies to the mobile station with the uplink asynchronous hybrid automatic repeat request subframe by using the downlink subframe. Reply message. The response message is separated from the uplink asynchronous hybrid automatic repeat request subframe by at least 2 subframes. Moreover, in the case that the response message is an error response message, the method may further include: the mobile station retransmitting the uplink asynchronous hybrid automatic repeat request data in a subsequent radio frame of the radio frame in which the uplink asynchronous hybrid automatic repeat request subframe is located. The subframe between the response message and the retransmitted uplink asynchronous hybrid automatic retransmission request data is at least 2 subframes. In addition, in a case that the mobile station sends data to the base station through the uplink asynchronous hybrid automatic repeat request subframe, the method may further include: the mobile station sends data to the base station by using an asynchronous hybrid automatic repeat request process of the wireless frame, where, the asynchronous The hybrid automatic repeat request process includes an uplink asynchronous hybrid automatic repeat request subframe or a plurality of consecutive or discontinuous uplink asynchronous hybrid automatic repeat request subframes. In addition, in the case that the retransmission interval is less than or equal to one radio frame length, the mobile station transmits data to the base station through the uplink synchronization hybrid automatic retransmission request subframe; when the retransmission interval is greater than one radio frame length, The mobile station transmits data to the base station through the uplink asynchronous hybrid automatic repeat request subframe. Moreover, the uplink synchronous hybrid automatic repeat request subframe is an uplink subframe of the synchronous non-adaptive hybrid automatic repeat request mode; the uplink asynchronous hybrid automatic repeat request subframe is an uplink of the asynchronous non-adaptive hybrid automatic repeat request mode. frame. According to another aspect of the present invention, an implementation system for an uplink hybrid automatic repeat request is provided. The system includes: a mobile station, configured to send data to the base station by using an uplink synchronization hybrid automatic repeat request subframe and/or an uplink asynchronous hybrid automatic repeat request subframe of the radio frame; and a base station, configured to: The response information is returned to the mobile station through the downlink subframe of the radio frame. By means of at least one of the above technical solutions, the present invention is capable of maintaining a fixed RTT, reducing system overhead, maintaining a short RTT, and also supporting flexible scheduling. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a flowchart of a method for implementing an uplink hybrid automatic repeat request according to an embodiment of the method of the present invention; FIG. 2 is a schematic structural diagram of a radio frame of a TDD-OFDMA system according to the related art; A schematic diagram of a HARQ mechanism in which the DL/UL is 6:2 according to an embodiment of the present invention; FIG. 4 is a schematic diagram of a HARQ mechanism in which the DL/UL is 4:4 according to an embodiment of the present invention; 5 is a schematic diagram of another HARQ mechanism in which DL/UL is 4:4 according to an embodiment of the present invention; FIG. 6 is a HARQ mechanism according to an embodiment of the present invention in which DL/UL is 2:6. FIG. 7 is a schematic diagram of another HARQ mechanism in which DL/UL is 2:6 according to an embodiment of the present invention; FIG. 8 is a maximum synchronous HARQ when DL/UL is 3:5 according to an embodiment of the present invention. FIG. 9 is a schematic diagram of a maximum synchronous HARQ region when a DL/UL is 3:5 according to an embodiment of the present invention; FIG. 10 is a flowchart showing a preferred example of a hybrid automatic retransmission method according to an embodiment of the present invention; Figure 11 is a block diagram of an implementation system for a hybrid automatic repeat request in accordance with an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the technical solution provided by the embodiment of the present invention, the base station notifies the mobile station of the information of the preset uplink synchronization HARQ subframe and/or the information of the asynchronous HARQ subframe, so that the mobile station can pass The received uplink synchronization HARQ subframe and/or the uplink asynchronous HARQ subframe sends data to the base station, where the information of the uplink synchronization HARQ subframe includes the number and location of the uplink synchronization HARQ subframe, and the uplink asynchronous HARQ subframe information includes the uplink asynchronous The number and location of HARQ subframes. Method Embodiment In the embodiment of the present invention, an implementation method of an uplink hybrid automatic repeat request (HARQ) is provided, which is applied to a time division duplex orthogonal frequency division multiplexing system including a base station and a terminal. The base station notifies the mobile station of the information of the uplink synchronization HARQ subframe and/or the information of the asynchronous hybrid automatic retransmission request subframe, where the information of the uplink synchronization HARQ subframe includes the number and location of the uplink synchronization HARQ subframe, and the uplink asynchronous hybrid automatic The information of the retransmission request subframe includes the number and location of the uplink asynchronous hybrid automatic repeat request subframe. The process flow shown in FIG. 1 is performed below. FIG. 1 is a flowchart showing an implementation method of an uplink hybrid automatic repeat request according to an embodiment of the present invention, and shows step S102 and step S104. Step S102: The mobile station sends data to the base station by using a preset uplink synchronization HARQ subframe and/or an uplink asynchronous HARQ subframe. The uplink synchronous HARQ subframe is in the maximum synchronous HARQ region, where the maximum synchronous HARQ region is an uplink subframe that satisfies the RTT requirement for a radio frame, where the uplink synchronous HARQ subframe is an uplink sub-frame of the synchronous non-adaptive HARQ mode. The uplink asynchronous HARQ subframe is an uplink subframe of the asynchronous non-adaptive HARQ mode. In a specific implementation process, the mobile station should select a subframe of synchronous hybrid automatic retransmission in the allowed maximum synchronous hybrid automatic retransmission area, where the maximum synchronous hybrid automatic retransmission area is a retransmission interval for hybrid automatic retransmission. The largest sub-frame area of a radio frame, wherein the data transmitted on each sub-frame can be retransmitted at a corresponding position of the next radio frame, while allowing processing of the isochronous condition. In the case that the mobile station transmits data to the base station through the uplink synchronization HARQ subframe, the mobile station transmits data to the base station through the synchronous HARQ process of the radio frame, where the synchronous HARQ process includes one uplink synchronization HARQ subframe, or includes multiple consecutive or Discontinuous uplink synchronization HARQ subframes. That is, the mobile station may transmit data to the base station through one synchronous HARQ uplink subframe of the radio frame; or may transmit data to the base station through multiple synchronous HARQ uplink subframes of the radio frame by multiple mobile stations. When the information of the uplink synchronization HARQ subframe changes, the base station notifies the mobile station of the changed uplink synchronization HARQ subframe, wherein the notification manner includes any one of broadcast, multicast, and unicast. Kind or a combination thereof. When the mobile station transmits data to the base station through the uplink asynchronous HARQ subframe, the base station returns a response message of the uplink asynchronous HARQ subframe to the mobile station through the downlink subframe. The response message is separated from the uplink asynchronous HARQ subframe by at least 2 subframes. In the case that the response message is NACK, the mobile station retransmits the uplink asynchronous HARQ data in the subsequent radio frame of the radio frame in which the uplink asynchronous HARQ subframe is located. The response message is separated from the retransmitted uplink asynchronous HARQ data by at least 2 subframes. In addition, the mobile station transmits data to the base station through an asynchronous HARQ process of the radio frame, where the asynchronous HARQ process includes one uplink asynchronous HARQ subframe or multiple consecutive or discontinuous uplink asynchronous HARQ subframes. In addition, when the retransmission interval is less than or equal to one radio frame length, the mobile station transmits data to the base station through the uplink synchronization HARQ subframe; when the retransmission interval is greater than one radio frame length, the mobile station passes the uplink. The asynchronous HARQ subframe transmits data to the base station, and the asynchronous HARQ subframe or all the asynchronous HARQ subframes may be partially used. Step S104: The base station replies with a response message to the data sent by the mobile station. Specifically, in a case where the mobile station transmits data to the base station through the uplink synchronization HARQ subframe, the base station returns a response message of the uplink synchronization HARQ subframe to the mobile station through the downlink subframe, where the response message and the uplink synchronization HARQ subframe interval At least 2 subframes, if the response message is NACK, the mobile station retransmits the uplink synchronization HARQ data at the corresponding location of the next radio frame of the radio frame in which the uplink synchronization HARQ subframe is located. As can be seen from the above description, the downlink subframe transmission data capable of using the synchronous non-adaptive HARQ mode can maintain a fixed RTT, thereby reducing system overhead. The hybrid automatic retransmission method of the present invention will be described in detail below in conjunction with different uplink and downlink transmission ratios of radio frames. 2 shows a radio frame structure of a TDD OFDM system according to the related art. As shown in FIG. 2, one radio frame includes 8 subframes, that is, SF0 to SF7. Embodiment 1 Based on the frame structure shown in FIG. 2, the schemes a to d in FIG. 3 are schematic diagrams of a HARQ mechanism in which the UL/DL is 2:6 according to an embodiment of the present invention. As shown in FIG. 3, in the scheme a, in one radio frame, there are two uplink subframes and six downlink subframes, and each frame has a pair of uplink and downlink handover points, wherein the maximum synchronization HARQ region is as shown in the scheme. a is shown. In scheme b, two of the uplink subframes SF0 and SF1 can adopt the synchronous non-adaptive HARQ mode. The specific synchronous HARQ process is as shown in the scheme c and the scheme d of FIG. 3, and the RTT is the length of one radio frame, that is, the duration of eight TTIs. Embodiment 2 The schemes a to b of FIG. 4 are schematic diagrams of a HARQ mechanism in which the DL/UL is 4:4 according to an embodiment of the present invention. As shown in FIG. 4, in scheme a, in one radio frame, there are 4 downlink subframes, 4 uplink subframes, and each pair has uplink and downlink switching points, and the maximum synchronous HARQ region has 4 downlink sub-frames. frame. In the scheme b, the four downlink subframes adopt the synchronous non-adaptive HARQ mode, and the RTT is the length of one radio frame, that is, the length of eight TTIs. The four synchronous HARQ processes are as shown in scenario 4, scheme e, and scheme f in FIG. Embodiment 3 FIG. 5 is a schematic diagram of another HARQ mechanism in which DL/UL is 4:4 according to an embodiment of the present invention. As shown in FIG. 5, in scheme b, an uplink subframe SF0 and an uplink subframe SF1釆The asynchronous HARQ mechanism is used, and the uplink subframe SF2 and the uplink subframe SF3 use the synchronous HARQ mechanism. The two methods of synchronizing the HARQ process may use the scheme c and the scheme d in FIG. 5, and the RTT is a radio frame length. Here, when the maximum synchronous HARQ region includes all uplink subframes, that is, any uplink subframe can satisfy the synchronization non-adaptive HARQ timing requirement, all uplink subframes can be synchronized or non-adaptive HARQ mechanisms, or partially The choice is asynchronous adaptive HARQ mode to reflect the flexibility of asynchronous adaptive HARQ. Specifically, the system can select a synchronous HARQ subframe according to requirements. Embodiment 4 FIG. 6 is a schematic diagram of a HARQ mechanism with a UL/DL of 6:2 according to an embodiment of the present invention. As shown in FIG. 6, in scheme a, in one radio frame, the downlink subframe is six. There are two uplink subframes, one pair of uplink and downlink switching points in each frame, and the maximum synchronous HARQ area is 4 subframes. In scheme d, the uplink subframes SF2, SF3, and SF4 use a synchronous non-adaptive HARQ mechanism, and the subframes SF0, SF1, and SF5 employ an asynchronous adaptive HARQ mechanism. The subframes SF2, SF3, and SF4 are respectively referred to as synchronous HARQ processes 1, 2, and 3; the subframes SF2, SF3, and SF4 are respectively asynchronous HARQ areas i or whose processes are not specified. For different users, the selected sync area can be the same or different. For example, user 1 selects subframe SF2 as a synchronous non-adaptive HARQ region, and user 2 selects SF3 as a synchronous non-adaptive HARQ region, and this allocation is negotiated with the mobile station at the base capability negotiation. The user's synchronous HARQ data is transmitted in a synchronous HARQ subframe, and the asynchronous adaptive HARQ data is transmitted in an asynchronous HARQ region. The base station may change the number of subframes and the subframe number as the synchronous non-adaptive HARQ according to the service condition, and the base station notifies the base station by using a broadcast, multicast, or unicast message, and all the subframes of the synchronous non-adaptive HARQ must be given in the system. The maximum synchronization is within the non-adaptive HARQ region. Embodiment 5 FIG. 7 is a schematic diagram of another HARQ mechanism with a UL/DL of 6:2 according to an embodiment of the present invention. As shown in FIG. 7, in scheme a, in a radio frame, an uplink subframe is Six, the downlink subframe is two, each frame has a pair of uplink and downlink switching points, and the maximum synchronous HARQ area is 4 subframes. In the scheme d, the base station issues an uplink subframe number that can perform synchronous non-adaptive HARQ in the broadcast information, and the mobile station can send data to the base station through the subframes, and the HARQ mode is the synchronous non-adaptive mode. The data transmitted by the mobile station outside the synchronous non-adaptive HARQ area is the asynchronous adaptive mode. The subframes SF2 and SF3 may be combined into one HARQ process, which is a synchronous non-adaptive HARQ process 1, such as scheme c; and the subframe SF4 is a synchronous non-adaptive HARQ process 2, such as scheme d. The subframes SF0, SF1, and SF5 are asynchronous adaptive HARQ modes, where SF0 and SF1 can be combined into one process, that is, asynchronous adaptive HARQ process 1, and subframe SF5 is asynchronous adaptive HARQ process 2. Multiple subframes using the same HARQ mode can be freely combined to form a process to accommodate large traffic demands, further reducing system overhead. When the mobile station performs basic capability negotiation with the base station, the uplink subframes SF2, SF3, and SF4 are selected to use the synchronous non-adaptive HARQ mechanism, and the subframes SF0, SF1, and SF5 use the asynchronous adaptive HARQ mechanism. The base station may change the number of subframes and the subframe number as the synchronous non-adaptive HARQ according to the service condition, and notify all mobile stations or corresponding mobile stations by using a broadcast message. Embodiment 6 FIG. 8 is a schematic diagram of a maximum synchronous HARQ region when the UL/DL is 3:5 according to an embodiment of the present invention, and FIG. 9 is a maximum synchronization when the UL/DL is 5:3 according to an embodiment of the present invention. The schematic diagram of the HARQ area, the processing procedure corresponding to FIG. 8 and FIG. 9 is similar to the processing procedure corresponding to FIG. 5, FIG. 6, and FIG. 7, and will not be repeated here. Based on the above description, FIG. 10 shows a preferred embodiment of a hybrid automatic retransmission method according to an embodiment of the present invention. As shown in FIG. 10, the processing flow of the hybrid automatic retransmission method of the preferred embodiment includes the following steps (steps S1002 - step S1004): Step S1002: The mobile station transmits data to the base station by using a synchronous HARQ uplink subframe and an asynchronous HARQ uplink subframe of the radio frame, where the synchronous HARQ uplink subframe is an uplink using the synchronous non-adaptive HARQ mode. The subframe, the asynchronous HARQ uplink subframe is an uplink subframe that uses the asynchronous adaptive HARQ mode; in step S1004, the base station returns the response information of the synchronous HARQ uplink subframe and the asynchronous HARQ uplink subframe to the base station by using the downlink subframe of the radio frame, where The downlink subframe of the reply response message is separated from the synchronous HARQ uplink subframe and the asynchronous HARQ uplink subframe by at least 2 subframes. System Embodiment In this embodiment, an implementation system of uplink HARQ is provided. 11 is a block diagram of an implementation system of uplink HARQ according to the present embodiment. As shown in FIG. 11, the implementation system of the uplink HARQ includes a mobile station 1 and a base station 3.

The mobile station mobile station 1 is configured to transmit data to the base station through an uplink synchronization HARQ subframe and/or an uplink asynchronous HARQ subframe of the radio frame. Preferably, the mobile station 1 may comprise a construction unit 11 for constructing a radio frame, the radio frame being configured to include a synchronous HARQ uplink subframe, and a transmitting unit 13 connected to the construction unit 11 for synchronizing the HARQ uplink subframe send data. Preferably, the mobile station 1 may further include: a receiving unit 15 configured to receive a response message from the base station, where the response message may be an ACK or a NACK; and a retransmission unit 17 connected to the receiving unit 15 for responding to the message In the case of NACK, synchronous HARQ data is retransmitted at the same location of the next radio frame, or asynchronous data is retransmitted by subsequent radio frames. Base station

The base station 2 communicates with the mobile station 1 for replying the response information to the mobile station through the downlink subframe of the radio frame. Preferably, the base station 2 may include: a receiving unit 21, configured to receive a radio frame from the mobile station 1; and a response unit 23 connected to the receiving unit 21, for returning the synchronous HARQ uplink subframe to the mobile station by using the downlink subframe The response information, the downlink subframe of the reply response information is separated from the synchronous HARQ uplink subframe by at least 2 subframes, and the downlink subframe of the reply acknowledgement information and the retransmission subframe of the asynchronous HARQ uplink subframe are separated by at least 2 subframes. Preferably, the base station 20 further includes: a constructing unit 25, configured to construct a radio frame, and configure the radio frame to include a synchronous HARQ uplink subframe and an asynchronous HARQ subframe. Preferably, the implementation system of the uplink HARQ according to the embodiment of the present invention further includes: a synchronization subframe and an asynchronous subframe notification unit, configured to notify the mobile station to synchronize the information of the HARQ uplink subframe and the information of the asynchronous HARQ uplink subframe in advance, The information of the synchronous HARQ uplink subframe includes the number and location of the synchronous HARQ uplink subframes. The information of the asynchronous HARQ uplink subframe includes the number and location of the asynchronous HARQ uplink subframes. With the above technical solution of the present invention, the following technical effects can be achieved:

(1) Utilizing the advantages of synchronous non-adaptive HARQ, low processing, simple processing, and fixed RTT, the system overhead is reduced;

(2) Using the scheduling flexibility of asynchronous adaptive HARQ to avoid conflicts of emergency services;

(3) Using the high transmission efficiency characteristics of asynchronous adaptive HARQ, the RTT and retransmission times of HARQ are reduced. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any particular combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. For those skilled in the art, the present invention can be variously modified and modified. Any modifications, equivalent substitutions, improvements, etc. made therein are intended to be included within the scope of the present invention.

Claims

Claim

An implementation method for an uplink hybrid automatic repeat request, which is applied to a time division duplex orthogonal frequency division multiplexing system including a base station and a mobile station, wherein the method includes: the mobile station adopts a preset The uplink synchronous hybrid automatic repeat request subframe and/or the uplink asynchronous hybrid automatic repeat request subframe transmit data to the base station.

2. The method according to claim 1, wherein the mobile station transmits to the base station by using the uplink synchronization hybrid automatic repeat request subframe and/or the asynchronous hybrid automatic repeat request subframe. Before the data, it also includes:

Notifying the mobile station of the information of the uplink synchronization hybrid automatic repeat request subframe and/or the information of the asynchronous hybrid automatic repeat request subframe, where the uplink synchronization hybrid automatic repeat requester The information of the frame includes the number and location of the uplink synchronous hybrid automatic repeat request subframe, and the information of the uplink asynchronous hybrid automatic repeat request subframe includes the number and location of the uplink asynchronous hybrid automatic repeat request subframe.

The method according to claim 2, wherein, in the case that the information of the uplink synchronization hybrid automatic repeat request subframe and/or the information of the asynchronous hybrid automatic repeat request subframe changes, The base station notifies the mobile station of the information of the changed uplink synchronization hybrid automatic repeat request subframe and/or the information of the asynchronous hybrid automatic repeat request subframe, wherein the manner of notification includes: broadcasting, multicast, and single Any one of the broadcasts or a combination thereof.

The method according to claim 2, wherein the mobile station selects the subframe of the synchronous hybrid automatic retransmission in a predetermined maximum synchronous hybrid automatic retransmission area, where the maximum synchronization hybrid automatic The retransmission area is such that the retransmission interval of the hybrid automatic retransmission is the largest subframe area of one radio frame, wherein the data transmitted in each sub-frame can be corresponding to the processing of the isochronous condition, and the corresponding in the next radio frame. Resend at the location.

The method according to claim 1, wherein, in the case that the mobile station sends the data to the base station by using the uplink synchronization hybrid automatic repeat request subframe, the method further includes:

And transmitting, by the base station, a response message of the uplink synchronization hybrid automatic repeat request subframe to the mobile station by using a downlink subframe.

The method according to claim 5, wherein the response message is separated from the uplink synchronization automatic repeat request subframe by at least 2 subframes.

The method according to claim 5, wherein, in the case that the response message is an error response message, the method further includes:

The mobile station retransmits the uplink synchronization hybrid automatic repeat request data at a corresponding position of a next radio frame of the radio frame in which the uplink synchronization hybrid automatic repeat request subframe is located; wherein the response message and the retransmission The subframe of the uplink synchronization hybrid automatic repeat request data is separated by at least 2 subframes.

The method according to claim 5, wherein, in a case that the mobile station sends the data to the base station by using the uplink synchronization hybrid automatic repeat request subframe, the method further includes:

The mobile station sends the data to the base station by using a synchronous hybrid automatic repeat request process of a radio frame, where the synchronous hybrid automatic repeat request process includes an uplink synchronous hybrid automatic repeat request subframe, or includes multiple A continuous or discontinuous uplink synchronization hybrid automatic repeat request subframe.

The method according to claim 1, wherein, in a case that the mobile station sends the data to the base station by using the uplink asynchronous hybrid automatic repeat request subframe, the method further includes:

And transmitting, by the base station, a response message of the uplink asynchronous hybrid automatic repeat request subframe to the mobile station by using a downlink subframe.

The method according to claim 9, wherein the response message is separated from the uplink asynchronous hybrid automatic repeat request subframe by at least 2 subframes.

The method according to claim 9, wherein, in the case that the response message is an error response message, the method further includes:

And the mobile station retransmits the uplink asynchronous hybrid automatic repeat request data in a subsequent radio frame of the radio frame in which the uplink asynchronous hybrid automatic repeat request subframe is located;

The response message is separated from the retransmitted subframe of the uplink asynchronous hybrid automatic retransmission request data by at least 2 subframes.

12. The method according to claim 9, wherein in the case that the mobile station transmits the data to the base station by using the uplink asynchronous hybrid automatic repeat request subframe, the method further Includes:

The mobile station sends the data to the base station by using an asynchronous hybrid automatic repeat request process of the radio frame, where the asynchronous hybrid automatic repeat request process includes an uplink asynchronous hybrid automatic repeat request subframe, or includes multiple A continuous or discontinuous uplink asynchronous hybrid automatic repeat request subframe.

The method according to any one of claims 1 to 12, wherein, when the retransmission interval is less than or equal to a radio frame length, the mobile station transmits an automatic retransmission request by using the uplink synchronization hybrid The subframe transmits data to the base station; when the retransmission interval is greater than one radio frame length, the mobile station transmits data to the base station by using the uplink asynchronous hybrid automatic repeat request subframe.

The method according to any one of claims 1 to 12, wherein the uplink synchronization hybrid automatic repeat request subframe is an uplink subframe of a synchronous non-adaptive hybrid automatic repeat request mode; The uplink asynchronous hybrid automatic repeat request subframe is an uplink subframe of the asynchronous non-adaptive hybrid automatic repeat request mode.

An implementation system for an uplink hybrid automatic repeat request, which is characterized by comprising:

a mobile station, configured to send data to the base station by using an uplink synchronization hybrid automatic repeat request subframe and/or an uplink asynchronous hybrid automatic repeat request subframe of the radio frame;

And a base station, configured to reply the response information to the mobile station by using a downlink subframe of the radio frame.