CN101088241B

CN101088241B - Allocating data bursts and supporting hybrid auto retransmission request in orthogonal frequency division multiplexing access radio access system

Info

Publication number: CN101088241B
Application number: CN2005800446990A
Authority: CN
Inventors: 任彬哲; 千珍英; 陈庸硕; 李昌宰; 尹爱兰
Original assignee: Pantech Co Ltd
Current assignee: Pan Thai Co ltd
Priority date: 2004-12-27
Filing date: 2005-12-27
Publication date: 2013-01-30
Anticipated expiration: 2025-12-27
Also published as: KR20060073990A; KR101080964B1; CN101088241A

Abstract

The present invention relates to allocating data regions in an orthogonal frequency division multiplexing access system. The present invention comprises receiving a message comprising information for locating a data region of a data map allocated to a mobile station identified in the message for transmitting and receiving information, and identifying the data region of the data map allocated to the identified mobile station by reading the received message, wherein the data region is identified independent of identifying data regions of another data map.

Description

Distribute data burst and support method and the mobile radio station of h-arq in orthogonal frequency division multiplexing access radio access system

Technical field

The present invention relates to a kind of OFDM (OFDMA) wireless access system, more particularly, the present invention relates in the OFDMA wireless access system distribute data burst and support h-arq (HARQ).Although the present invention is suitable for using very on a large scale, but it is preferably suitable for reducing the trouble that produces in the process of checking all message that comprise previous message, to grasp the transmission position of the ack/nack signal that mobile subscriber station is distributed, produce wrong probability to reduce.The present invention is also preferably suitable for solving wherein because the making a mistake of cumulative distribute data burst midway, and recurs wrong problem in the distribution locations of follow-up data burst.

Background technology

Usually, ARQ (automatic repeat request) is that receiving terminal sends to transmitting terminal after receiving the data that transmitting terminal sends, and whether correctly receives the response message of these data with notice.Three kinds of systems that can illustrate respectively according to Figure 1A to 1C classify to ARQ.

Figure 1A illustrates " stop-and-wait (stop-and-wait) " ARQ system, and in this " stop-and-wait " ARQ system, after having sent data, transmitting terminal is waited for, to receive ACK or NACK message.Then, transmitting terminal sends new data, perhaps retransmits past data.

Figure 1B illustrates " moving back the N step (go-back-N) " ARQ system, and in this " moving back N goes on foot " ARQ system, transmitting terminal sends data continuously, and does not consider the response from receiving terminal.

After receiving the NACK signal, transmitting terminal is retransmitted the data from appropriate section.

Fig. 1 C illustrates " selectivity repeats formula (selective-repeat) " ARQ system, and in this selective-repeat ARQ system, transmitting terminal sends data continuously, and does not consider the response from receiving terminal.After receiving the NACK signal, this transmitting terminal is only retransmitted the data corresponding to the NACK signal of receiving.

In order to solve because because in grouping transmission communication system, require data rate to surpass 2Mbps, 10Mbps or higher, so select higher code rate (Rc=5/6,3/4), high order modulation (mould=16-QAM, 64-QAM) etc., and the problem that occurs when larger error occurs channel has proposed HARQ (hybrid ARQ).

Misdata in sending is stored in the buffer, with by with the HARQ system in retransmission of information combine, and it is used FEC (forward error correction).On the contrary, in the ARQ system, abandon the misdata in the transmission.The HARQ system is a kind of by FEC and ARQ being combined the system of generation.In addition, HARQ mainly is classified as following 4 systems.

At the first system, that is, in the I type HARQ system shown in Figure 2, all the time data are appended on the error detection code, preferentially to detect FEC (forward error correction).If still have mistake in the grouping, then request repeat.Abandon erroneous packet, then, use together packet retransmission with identical FEC code.

At second system, that is, in the II type HARQ system that is called as IR ARQ (steadily increase redundancy ARQ) shown in Figure 3, do not abandon erroneous packet, and it is stored in the buffer, thereby combine with the repeating transmission redundant digit.In retransmission process, the parity check bit outside the retransmission data position only.When each the repeating transmission, the parity check bit of repeating transmission changes.

In the 3rd system, that is, in shown in Figure 4, the III type HARQ system as the special case of II type HARQ system, each grouping can self-demarking code.This packet configuration error section and data to be retransmitted.Compare with II type HARQ system, this system can decode more accurately, but has defective aspect coding gain.

At the Quaternary system system, that is, in " soft combination I type " HARQ system shown in Figure 5, I type HARQ system is added transmitting terminal at first received and stored data with retransmission data function." soft combination I type " HARQ system is called as and measures combination or follow the tracks of (chase) combined system.Aspect signal and interference-to-noise ratio (SINR), this system has advantage, and this system uses the identical parity check bit of retransmission data all the time.

Recently, in order to research and develop OFDM (OFDM) or the OFDMA (OFDM) that is fit to be undertaken by the wire/wireless channel high speed data transfer, paid very large effort.In OFDM, utilize mutually orthogonal a plurality of carrier waves, improved frequency efficiency.In the sending/receiving process, the processing of a plurality of carrier waves of modulating/demodulating comes to the same thing with execution IDFT (inverse discrete Fourier transformer inverse-discrete)/DFT (discrete Fourier transform), and utilize IFFT (invert fast fourier transformation)/FFT (fast Fourier transform), can be with the process of a plurality of carrier waves of realization of High Speed modulating/demodulating.

The principle of OFDM is, by high-speed data-flow being divided into a plurality of low rate data streams, then, sends simultaneously a plurality of low rate data streams by utilizing a plurality of subcarriers, to increase the mode of code element duration, utilizes the multidiameter expansion, reduces the relative diffusion in the time domain.In addition, OFDM sends data take transmitted symbol as unit.

Owing to can utilize DFT (discrete Fourier transform) optionally to carry out modulating/demodulating among the OFDM, need not each independent subcarrier design modulator/demodulator.

Fig. 6 illustrates the configuration of OFDM (OFDM) modulator/demodulator.With reference to figure 6, the data flow of serial input is transformed to the parallel data stream that adds up to number of subcarriers.Each parallel data stream is carried out respectively inverse discrete Fourier transformer inverse-discrete (IDFT).For the fast processing data, adopt IFFT (invert fast fourier transformation).Then, the data with inverse fourier transform are converted to serial data again, to send by frequency translation.Receiving terminal receives corresponding signal, carries out demodulation to utilize inverse process.

In mobile communication system, resource comprises channel, that is, and and frequency band.The multiple access access is to the method for each user assignment limited frequency band for the user effectively uses.Duplex is in two-way communication, and difference up link (UL) connects is connected DL with down link) method of attachment of connection.Wireless multiple access access and multiplex system are to carry out wireless transmission with the basic platform technology of effective use finite frequency resource, and depend on the frequency band, number of users, data rate, mobility, cell structure, wireless environment etc. of distribution.

OFDM (OFDM) is a kind of MCM (multicarrier sends/modulation) that adopts many carrier waves, and it is to make the input data parallel turn to employed number of carriers, to be sent in the system of the data of load on the corresponding carriers.OFDM is the strong candidate target of Radio Transmission Technology that satisfies the requirement of the 4th third-generation mobile communication infrastructure, according to user's multiple access system, it can be divided into: OFDM frequency division multiple access (OFDM-FDMA), OFDM time division multiplexing (OFDM-TDMA) and OFDM code division multiple access (OFDM-CDMA).OFDM-FDMA, OFDM-TDMA and OFDM-CDMA system have merits and demerits.In addition, there is the scheme that shortcoming is compensated.

OFDM-FDMA (OFDMA) is fit to the 4th generation macrocellular/microcellulor infrastructure, and it does not have presence of intercell interference, frequency reuse efficient is high and have good Adaptive Modulation and granularity.By utilizing the shortcoming of these OFDM-FDMA of compensation such as diffusion frequency hopping, a plurality of antenna, strong coding, can improve diversity, and can reduce the impact of presence of intercell interference.By according to the data rate of each user request assigning sub-carriers quantity differently, OFDMA is Resources allocation effectively.In addition, OFDMA can also improve transmitting efficiency, because it does not need as OFDM-TDMA, before receive data, requires each user to utilize preamble to carry out initialization.Particularly, OFDMA is fit to use the situation (for example, the situation that the FFT size is large) of a large amount of subcarriers, and its effective application is in the wireless communication system with relatively wide residential quarter area.In addition, in by the situation that overcomes the subcarrier that has the deep fading in the wireless channel, perhaps overcome in the situation of the interference that has the subcarrier that another user causes, improved the frequency diversity effect and realize in moderate interference result's the situation, adopt frequency-hopped ofdm A system.Fig. 6 illustrates the OFDMA system, and in this OFDMA system, the grid of distribution (grid) is carried out frequency hopping according to time slot in frequency domain.

Fig. 7 is the structure chart according to the Frame in the OFDMA wireless communication system of prior art.With reference to figure 7, trunnion axis is the time shaft that represents as the unit take code element, and vertical axis is the frequency axis take subchannel as unit.Subchannel refers to a branch of a plurality of subcarrier.Particularly, in the OFDMA physical layer, effective carrier wave is divided into group, so that they are sent to respectively different receiving terminals.Therefore, the one group of subcarrier that sends to a receiving terminal is called as subchannel.In this case, the carrier wave that disposes this subchannel can be adjacent each other, also can separate equably mutually.

As shown in Figure 7, utilize the definite timeslice to each user assignment in data field of two-dimensional space, this data field is the one group of continuous subchannel that utilizes burst to distribute.In OFDMA, as shown in Figure 7, the rectangle that can utilize time and subchannel coordinate to determine represents a data field.Can be to this data field of specific user's uplink allocation.In addition, the base station can send to this data field the specific user on the down link.

In the OFDM/OFDMA of prior art wireless communication system, if there are the data that will send to mobile subscriber station (MSS), then base station (BS) distributes the data field that sends by DL-MAP (down link MAP).By the zone (DL burst #1 to #5 shown in Figure 7) of distributing, mobile subscriber station receives this data.

In Fig. 7, downlink subframe is to be used for realization synchronously and the preamble of physical layer equilibrium is begun, and utilize to be used for determine the address and respectively to down link MAP (DL-MAP) and up link MAP (UL-MAP) message of the broadcasting format of the use of the burst of up link and downlink allocation, define the structure of whole frame.

The use of each burst that on the DL-MAP message definition physical layer downlink interval is distributed, and the UL-MAP message definition is to the use of the burst of uplink interval distribution.On the information word (IE) of configuration DL-MAP message, at user side, utilize positional information (for example, subchannel offset, symbol offset, Sub-Channel Number, code element number) the identification downlink traffic interval of DIUC (downlink interval use code) and this burst.Simultaneously, when the information word of configuration UL-MAP message, utilize the UIUC (uplink interval use code) of each CID (connection ID) to determine its use, and utilize " duration " to regulate the position of corresponding interval.In this case, the value of the UIUC that uses according to UL-MAP is determined the use at each interval.Each interval begins with the point that leaves previous certain distance of IE starting point, and length that wherein should distance is " duration " that UL-MAP IE regulates.

DCD (downlink channel descriptor) message and UCD (uplink channel descriptor) message comprise: modulation type, FEC type of code etc., and as the physical layer relevant parameter at the burst interval that will be applied to down link and up link are distributed respectively.In addition, provide call parameter (for example, the K of R-S code, R etc.) based on various forward error correction codes types.Utilization provides these parameters to the burst distribution of the UIUC in UCD and the DCD (uplink interval use code) and DIUC (downlink interval use code) setting respectively.

In ofdma communication system, according to whether supporting the HARQ system burst distribution method to be categorized as general MAP method and HARQ method.

The burst distribution method of general MAP on the down link has been instructed rectangle, and as shown in Figure 7, it disposes time shaft and frequency axis.That is, this burst distribution method has been instructed the number of sub-channels (number of sub-channels) of start element number (symbol offset), beginning Sub-Channel Number (subchannel offset), the number of symbols (OFDMA number of symbols) of using and use.Because in the method for up link employing to symbol axis order-assigned burst, so by only instructing the number of symbols of using, can distribute the up link burst.

Fig. 8 is the Frame according to HARQ MAP.With reference to figure 8, in HARQ MAP, all adopt along the method for subchannel (subcarrier) axle order-assigned burst in up link and down link, these are different from general MAP method.In HARQ MAP, only notify the length of burst.In the method, as shown in Figure 8, the order-assigned burst.The starting position of burst is corresponding to the end position of previous burst, and takies the Radio Resource that equals the allocated length that this starting point begins.The method of explained later relates to the method for distributing burst with accumulate mode along frequency axis.Distribute the method for burst to defer to identical principle along time shaft.

In HARQ MAP, MAP message can be divided into a plurality of MAP message (for example, HARQ MAP#1, HARQ MAP#2 ..., HARQ MAP#N), so that each MAP message of dividing all has the at random information of burst.For example, MAP message #1 can comprise the information of burst #1, and MAP message #2 can comprise the information of burst #2, and MAP message #3 can comprise the information of burst #3 to #5.

As mentioned above, the OFDMA system uses HARQ MAP to support HARQ.Because HARQMAP pointer IE is included among the DL MAP, so if there is the method along downlink subchannels axle order-assigned burst in the position of notice HARQ MAP in HARQ MAP.The starting position of burst is corresponding to the end position of previous burst, and takies the Radio Resource that equals the allocated length that begins from the starting position, and this can be applied to up link equally.

Utilize expression whether successfully to receive the ack/nack signal of the data burst of transmission, the ack signal district of informing uplink.If the mobile subscriber stands in the first frame and receives burst, then ack/nack signal is delivered to the ack signal district of the up link of (i+j) frame.Utilize UCD to send the value of " j ".In the process of distributing the ack signal district, a kind of method is the uplink allocation ack signal district to each HARQ message.Have another kind of method, in the method, at least two HARQ MAP message in a plurality of HARQ MAP message of frame are used an ack signal district.

The below describes in detail and wherein to be 1 by the HARQ ACK district of judging frame, sequentially notifies the method for timeslice of the ack/nack signal of the burst that utilizes HARQ MAP distribution of messages.

Fig. 9 distributes the schematic diagram of the method for HARQ signaling zone in the mode of HARQ MAP message.In HARQ MAP message, utilize starting position and four kinds of information (OFDMA symbol offset, subchannel offset, OFDMA number of symbols, number of sub-channels) in ack signal district, to uplink allocation ack signal district.Each mobile subscriber station is input to ack signal district (Fig. 9) to uplink allocation with the ack/nack signal order, to indicate whether successfully to receive each burst.The starting position of ack/nack signal is corresponding to the position of the contiguous ACK/NACK information of before having received.In HARQ MAP message, a series of ack/nack signals are followed the burst order of down link.That is, as the order of burst #1 to #7, with the order corresponding to the order of burst # to #7, send the ack/nack signal in the HARQ ACK district that distributes on the up link.

With reference to figure 9, MAP message #1 comprises the assignment information of burst #1 and #2, and MAP message #2 comprises the assignment information of burst #3 and #4, and MAP message #3 comprises the assignment information of burst #5 to #7.Mobile subscriber station #1 (MSS#1) reads the information of the burst #1 in the content of MAP message #1, and then, notice utilizes HARQ MAP message to represent whether successfully to receive initial time sheet in the HARQ ack signal district that sends data.The position that sequentially is close to the ack/nack signal timeslice of the burst #1 in ack signal district by identifying it, MSS#2 knows its position (by the count increments of the burst #1 in the content that makes MAP message #1, learning the position in the HARQ ack signal) in HARQ ack signal district.The sum of the burst #1 by calculating MAP message #1 and the timeslice of #2, MSS#3 learns its position in the HARQ ack signal.Therefore, can sequentially learn HARQ

Position in the ACK district.

Mobile subscriber station should read the MAP message of delivering to another mobile subscriber station, to learn the ACK/NACK address in the ack signal that himself distributes, then, should be by the burst in this message of accumulation calculating.In doing so, if before reading current HARQ MAP message, previous HARQ MAP message makes a mistake, and then can not try to achieve the accurate address of the timeslice of the burst that is mapped to the data in the ack signal district.For example, if HARQMAP message #1 makes a mistake, shown in Figure 10 A and 10B, then MSS#5, the MSS#6 of HARQ MAP message #3 and MSS#7 can not learn the address of the timeslice of input ack/nack signal in the ack signal district.Equally, the MSS#3 of HARQ MAP message #2 and MSS#4 can not learn with ack/nack signal the two one of be input to the address of its timeslice.Therefore, although only in a HARQ MAP message, make a mistake, must retransmit all data, therefore, cause expense.

Figure 11 A and 11B are for the canonical schema of explanation according to the cumulative type distribute data burst of prior art.

With reference to figure 11A and 11B, MAP message #1 comprises the assignment information of burst #1 and #2, and MAP message #2 comprises the assignment information of burst #3 to #5.

According to the information that obtains in the content of MAP message #1, MSS#1 learns size and the address of burst.By the burst #1 in the content that reads MAP message #1 " duration ", MSS#2 learns the address of burst #2.Therefore, the total value of the burst #1 by calculating MAP message #1 and " duration " of #2, MSS#3 learns the address of burst #3.Therefore, can sequentially learn in the above described manner the address of all bursts.

As the top description that the method for prior art is done, in order to grasp address and the size to the data burst that himself distributes, each mobile subscriber station (MSS) all needs to read the message that is forwarded to another mobile subscriber station, and should calculate " duration " value in this MAP message.

Yet if having mistake in the previous MAP message, mobile subscriber station can not calculate the accurate address to its burst that oneself distributes.For example, if in the MAP message #1 shown in Figure 11 A, have mistake, then can not learn the address of the burst that MSS#3 to #5 is distributed and the address of burst that MSS#1 and #2 are distributed.

Summary of the invention

The present invention relates in the OFDMA wireless access system distribute data burst and support mixed automatic retransmission request (HARQ).

To describe other features and advantages of the present invention to a certain extent in the following description, and to a certain extent, according to the following describes, other features and advantages of the present invention are apparent, perhaps by implementing the present invention, can learn other features and advantages of the present invention.The structure of utilizing written explanation of the present invention and claim thereof and accompanying drawing to particularly point out can realize and reach purpose of the present invention and other advantages.

In order to realize these and other advantage of the present invention, and according to purpose of the present invention, as this realization and general description, to be used for method concrete manifestation the present invention of the support h-arq (HARQ) in the mobile radio station of orthogonal frequency division multiple access system, the method comprises: receive map message from the base station, this map message comprises the information of the position in indicating downlink link data district, the down link data short pulse of distributing to this mobile radio station will be received by this down link data district, wherein this map message further comprises the information of the position that is used to indicate the ack/nack signal timeslice, the ack/nack signal that responds this down link data short pulse will be transmitted by this ack/nack signal timeslice, and this ack/nack signal timeslice is arranged in the ack/nack signal district of up link; And by reading the map message of receiving, be identified as the position of the ack/nack signal timeslice of mobile radio station distribution.

According to an aspect of the present invention, a kind of for the mobile communication equipment at the support h-arq (HARQ) of orthogonal frequency division multiple access system, this mobile communication equipment comprises: receiver, it is used for from base station reception map message, this map message comprises the information of the position in indicating downlink link data district, the down link data short pulse of distributing to mobile radio station will be received by this down link data district, wherein this map message further comprises the information of the position that is used to indicate the ack/nack signal timeslice, the ack/nack signal that responds this down link data short pulse will be transmitted by this ack/nack signal timeslice, and this ack/nack signal timeslice is arranged in the ack/nack signal district of up link; And processor, it is identified as the position of the ack/nack signal timeslice of mobile radio station distribution by reading the map message of receiving.

Obviously, the general remark that the above does the present invention and the following detailed description that the present invention is done be typicalness with illustrative, and they are intended to further explain desired the present invention.

Description of drawings

Included accompanying drawing helps further to understand the present invention, and accompanying drawing introduces this specification, consists of the part of this specification, and they illustrate embodiments of the invention, and they and explanation one are used from the explanation principle of the invention.According to one or more embodiment of the present invention, in different accompanying drawings, utilize feature of the present invention that same Reference numeral represents, unit with aspect represent identical, equivalence or similarly feature, unit or aspect.

Figure 1A to 1C is dissimilar arq (ARQ) system according to prior art.

Fig. 2 to 5 illustrates the feature according to the dissimilar ARQ system of prior art.

Fig. 6 illustrates the configuration of OFDM (OFDM) modulator/demodulator.

Fig. 7 illustrates the Frame in OFDM (OFDMA) wireless communication system according to prior art.

Fig. 8 illustrates the Frame according to the distribution HARQ burst of prior art.

Fig. 9 illustrates the method that is used for the HARQ signaling zone of distribution HARQ MAP message according to prior art.

Figure 10 A and 10B illustrate the method that is used for the HARQ signaling zone of distribution HARQ MAP message according to prior art.

Figure 11 A and 11B illustrate according to the cumulative type of the data burst of prior art and distribute.

Figure 12 illustrates the information that is included in the mapping message according to an embodiment of the invention.

Figure 13 illustrates the information that is included in the mapping message according to an embodiment of the invention.

Figure 14 illustrates the information that is included in the mapping message according to an embodiment of the invention.

Figure 15 illustrates the information that is included in the mapping message according to an embodiment of the invention.

Figure 16 illustrates the information that is included in the mapping message according to an embodiment of the invention.

Figure 17 illustrates the flow chart of judging the processing procedure in the ack signal district that mobile subscriber station is distributed by receiving MAP message according to an embodiment of the invention.

Embodiment

Now, will describe the preferred embodiments of the present invention in detail, its example shown in the drawings.In institute's drawings attached, as possible, represent identical or similar part with regard to utilizing same Reference numeral.

Figure 12 illustrates the information that is included in the mapping message according to an embodiment of the invention.With reference to Figure 12, for to mobile subscriber station allocation of downlink or uplink data burst, in each MAP message, comprise respectively the address information such as " beginning skew " of data burst." beginning skew " is the first burst (the burst #1 of MAP message #1 about MAP message, the information of the start address burst #3 of MAP message #2), and its first burst of indicating this MAP message is from which address location.In Figure 12, preferably MSS#1 is distributed since the first address location burst #1 of 4 address locations altogether, begin the altogether burst #2 of 15 address locations and MSS#2 distributed from previous address location.MSS#3 is distributed since the 20th the address location burst #3 of 8 address locations altogether.The allocation result of the data burst of each mobile subscriber station shown in Figure 12 is identical with the allocation result shown in Figure 11 B.

With reference to Figure 13, by two values are provided, " symbol offset " and " subchannel offset " utilizes the two-dimensional coordinate value on the Frame, and expression is included in the address information of the data burst in each MAP message." symbol offset " and " subchannel offset " is preferably about the first burst (burst #1 of MAP message #1 of each message, the information of the start address burst #3 of MAP message #2), and it is corresponding to the two-dimensional coordinate value according to time shaft and the frequency axis of this Frame.Because among the MAP message #2 " symbol offset=4 ", and " subchannel offset=2 ", so the start address of the burst #3 that MSS#3 is distributed is identical with the situation shown in Figure 11 B.

" beginning skew " and " symbol offset " and " subchannel offset " shown in Figure 13 that table 1 and table 2 illustrate among Figure 12 are included in the HARQ MAP message, in order to technological thought of the present invention is applied to IEEE802.16d/e OFDMA system.

[table 1]

Grammer	Size (position)	Note
			HARQ MAP message format(){
HARQ MAP Indicator＝111	3	Be set to 0b11
			HARQ UL-MAP appended	1
CRC appended	I
			MAP message length	9	The length of HARQ MAP take byte as unit
DL IE count	6	The quantity of DL IE in this burst
			Start offset	16
For(I＝0；I＜DL IE count；I++){
			Compact DL-MAP IE()	Variable le
}
			If{Compact UL-MAP appended＝＝1}{
Start offset	16
			While(map data remains){
Compact UL-MAP JE()	Variable
			}
}
			If{(byte boundary){
Padding nibble	4
			}
}

[0069] [table 2]

Grammer	Size (position)	Note
			Symbol offset	8
Subchannel offset	8

Table 3 and table 4 illustrate " beginning skew " or " symbol offset " and " subchannel offset " that comprises according to the form " DL-MAP-IE " in the HARQ MAP message, technological thought of the present invention is applied to the form of IEEE802.16d/e OFDMA system.The start address of the first down link data burst in " the beginning skew " in table 3 and the table 4 and " symbol offset " and " subchannel offset " expression HARQ MAP message.

[table 3]

Grammer	Size (position)	Note
			Start_Offset_Compact DL-MAP IE(){
DL-MAP Type＝7	3
			DL-MAP sub-type	5	Expansion subtype=3
Length	4	The length of IE byte
			Start Offset	16	The start address of the first burst among the DL-MAP IE of back
Reserved	4
			}

[0074] [table 4]

Grammer	Size (position)	Note
			Start_Offset_Compact DL-MAP IE(){
DL-MAP Type＝7	3
			DL-MAP sub-type	5	Expansion subtype=3
Length	4	The length of IE byte
			Symbol Offset	8	The first burst among the DL-MAP IE of back is along the start address of code element
Subclumnel Offset	8	The first burst among the DL-MAP IE of back is along the start address of subchannel
			Reserved	4
}

Table 5 and table 6 illustrate " beginning skew " or " symbol offset " and " subchannel offset " that comprises according to the form " DL-MAP-IE " in the HARQ MAP message, technological thought of the present invention is applied to the form of IEEE802.16d/e OFDMA system.The start address of the first uplink data burst in " the beginning skew " in table 3 and the table 4 and " symbol offset " and " subchannel offset " expression HARQ MAP message.

[table 5]

Grammer	Size (position)	Note
			Start_Offset_Compact UL-MAP IE(){
DL-MAP Type＝7	3
			DL-MAP sub-type	5	Expansion subtype=3
Length	4	The length of IE byte
			Start Offset	16	The start address of the first burst among the UL-MAPIE of back
Reserved	4
			}

[0079] [table 6]

Grammer	Size (position)	Note
			Start_Offset_Compact UL-MAP IE(){
UL-MAP Type＝7	3
			UL-MAP sub-type	5	Expansion subtype=3
Length	4	The length of IE byte
			Symbol Offset	8	The first burst among the UL-MAP IE of back is along the start address of code element
Subchannel Offset	8	The first burst among the UL-MAP IE of back is along the start address of subchannel
			Reserved	4
}

Table 7 illustrates the form of table 3 to 6 situations about being included in the HARQ MAP message.

[table 7]

Grammer	Size (position)	Note
			HARQ MAP message format(){
...
			For(I＝0；I＜DL IE count； I++){
Compact DL-MAP IE()	Variable	One of compression DL-MAP IE can be Start_Offset_Compact_DL-MAP_IE ()
			}
...
			If(Compact UL-MAP appended＝1){
While(map data remains){
			Compact VL-MAP IE()	Variable	One of compression UL-MAP IE can be Start_Offset_Compact_DL-MAP_IE ()
}
			}

The mobile subscriber station reception comprises the MAP message to the address information of the up link of himself distributing or down link data burst, learning up link or down link data burst from this address information, to obtain the data of utilizing this uplink data burst to send, and utilize the uplink data burst to send data.

In the method for prior art, each mobile subscriber station must read the MAP message that is forwarded to another mobile subscriber station, learning address and the size of the data burst that distributes its oneself, and " duration " value in should this MAP message of accumulation calculating.If in the predetermined process process, any one of previous MAP message makes a mistake, and then corresponding mobile subscriber station can not be grasped the accurate address to the burst that himself distributes.

Yet, according to the present invention, the MAP message that does not need each mobile subscriber station to read to be forwarded to another mobile subscriber station, and read the MAP message that is forwarded to himself, to grasp down link or the uplink data burst that himself is distributed.

Therefore, by being independent of other message arrangement for the message to mobile subscriber station distribute data burst, the present invention has reduced the trouble of checking previous message that mobile subscriber station is produced for the address of learning up link that himself is distributed and down link data burst, and can reduce the probability that makes a mistake.

According to another embodiment, the invention provides a kind of utilization is included in for the first data burst in the HARQ MAP message that a plurality of mobile subscriber station distribute data bursts are sent its distribution, it send is used for providing the ACK that receives error check information or the mobile subscriber station (MSS) of NACK signal to this data burst, will be used to indicate such as the information of the positional information of " transmission positional information " and inserts the method in ack signal district.

Figure 14 illustrates the information that is included in the mapping message according to an embodiment of the invention.With reference to Figure 14, " ACK skew " refers to the address information of the timeslice in the ack signal district, utilize this address information, the mobile subscriber station that is included in the first data burst in each HARQ MAP message that has its distribution sends ACK or NACK signal, as the reception error check information of this data burst.For example, because " the ACK skew " in the MAP message #2, so the 3rd timeslice of utilizing the initial start address in ack signal district to begin has and ACK or the NACK signal of the data burst received from the base station in respective frame can be sent to this base station (please refer to Fig. 9) to the MSS#3 of the burst #3 of its distribution.The 4th timeslice that utilization begins from the initial start address in this ack signal district, MSS#4 can send ACK or NACK signal.

Figure 15 illustrates the information that is included in according to one embodiment of present invention in the mapping message.With reference to Figure 15, " burst quantity " is the burst quantity of the address information of the timeslice in the indication ack signal district, utilize this address information, the mobile subscriber station that is included in the first data burst in each HARQMAP message that has its distribution sends ACK or NACK signal, as the reception error check information of this data burst.For example, because " burst quantity " among the MAP message #3 is 5, then utilize the 5th timeslice that begins from the initial start address in this ack signal district, have and ACK or the NACK signal of the data burst received from the base station in respective frame can be sent to this base station (please refer to Fig. 9) to the MSS#5 of the burst #5 of its distribution.

With reference to Figure 16, utilization such as mobile subscriber station sends the two-dimensional coordinate of " symbol offset " and " half subchannel offset " in the uplink sub-frames of ACK or NACK betwixt, the address information of the timeslice in the expression ack signal district, utilize this address information, the mobile subscriber station that is included in the first data burst in each HARQ MAP message that has its distribution sends ACK or NACK signal, as the reception error check information of this data burst.

Table 8 illustrates by Compact UL-MAP IE (UL-MAP Type=6) being inserted in the HARQ MAP message, notify this mobile subscriber station with " ACK skew " shown in Figure 14, thereby technological thought of the present invention is applied to the example of IEEE802.16d/e OFDMA system.

[table 8]

Grammer	Size (position)	Note
			Compact UL-MAP IE()
UL-MAP Type＝6	3
			Length	4	The length of IE byte
ACK Offset	8	The start address of the ACK of the first burst
			}

Table 9 illustrates by Compact UL-MAP IE (UL-MAP Type=6) being inserted in the HARQ MAP message, notify this mobile subscriber station with " burst quantity " shown in Figure 15, thereby technological thought of the present invention is applied to the example of IEEE802.16d/eOFDMA system.

[table 9]

Grammer	Size (position)	Note
			Compact UL-MAP IE()
UL-MAP Type＝6	3
			Length	4	The length of IE byte
Burst Number
		8	The quantity of burst
}

Table 10 illustrates by Compact UL-MAP IE (UL-MAP Type=6) being inserted in the HARQ MAP message, notify mobile subscriber station with " symbol offset " shown in Figure 16 and " half subchannel offset ", thereby technological thought of the present invention is applied to the example of IEEE802.16d/eOFDMA system.

[table 10]

Grammer	Size (position)	Note
			Compact UL-MAP IE()
UL-MAP Type＝6	3
			Length	4	The length of IE byte
Symbol Offset	8	The start address along code element of the ack signal of the first burst among the Compact UL-MAP IE of back
			Half subchannel offset	8	The start address along subchannel of the ack signal of the first burst among the Compact UL-MAP IE of back
reserved	4
			}

Table 11 illustrates by utilizing UL-MAP_IE extended pattern Compact UL-MAPIE (UL-MAP Type=7) to insert in the HARQ MAP message to 13, notify mobile subscriber station with " ACK skew ", " burst quantity " and " symbol offset " and " half subchannel offset ", thereby technological thought of the present invention is applied to the example of IEEE802.16d/e OFDMA system.

[table 11]

Grammer	Size (position)	Note
			Start_Offset_Compact UL-MAP IE(){
UL-MAP Type＝7	3
			UL-MAP sub-type	5	Expansion subtype=3
Length	4	The length of IE byte
			ACK Offset	8	The start address of the ack signal of the first burst among the Compact UL-MAP IE of back
reserved	4
			}

[0105] [table 12]

Grammer	Size (position)	Note
			Start_Offset_Compact UL-MAP IE(){
UL-MAP Type＝7	3
			UL-MAP sub-type	5	Expansion subtype=3
Length	4	The length of IE byte
			Burst Number
	8	The quantity of burst
			reserved	4
}

[table 13]

Grammer	Size (position)	Note
			Start_Offset_Compact UL-MAP IE(){
UL-MAP Type＝7	3
			UL-MAP sub-type	5	Expansion subtype=3
Length	4	The length of IE byte
			Symbol Offset	8	The start address along code element of the ack signal of the first burst among the Compact UL-MAP IE of back
Half subchannel offset	9	The start address along subchannel of the ack signal of the first burst among the Compact UL-MAP IE of back
			reserved	3
}

Mobile subscriber station receives the message of the transmission address information of the reception error check information (ACK or NACK signal) that comprises the data burst that sends to this mobile subscriber station, then, reception error check information according to this data burst, utilize this transmission address information to the timeslice in the ack signal district that himself distributes, send this ACK or NACK signal.

Figure 17 illustrates the flow chart of judging according to one embodiment of present invention the processing procedure in the ack signal district that mobile subscriber station is distributed by receiving MAP message.With reference to Figure 17, mobile subscriber station is checked the MAP message (S11) that is included in the Frame of receiving one by one.Then, mobile subscriber station judges whether the MAP message of current check defines new ack signal district (S12).

If the ack signal district that the MAP message definition of current check is new, then this mobile subscriber station is set to 0 with " ACK skew ", with beginning (S13).Otherwise this mobile subscriber station reads current " ACK skew " (S14).

Then, mobile subscriber station judges whether this MAP message comprises DL MAP IE (S15).If this MAP message does not comprise this DL MAP IE (counting=0), then this mobile subscriber station is checked next MAP message (S16).If MAP message comprises DL MAP IE, then this mobile subscriber station is checked the DL-MAP IE (S17) that comprises one by one.

Then, whether mobile subscriber station check has distributed the DL-MAP IE (S18) of check to himself.If himself has been distributed the DL-MAP IE of check, then this mobile subscriber station storage is somebody's turn to do " ACK skew " (S19), then, this " ACK skew " is added 1 (S20).

Then, mobile subscriber station is judged whether last DL-MAP IE (S21) of corresponding DL-MAP IE.If corresponding DL-MAP IE is last DL-MAP IE, then this mobile subscriber station begins to check the next MAP message that is included in the Frame of receiving from step S11 again.If corresponding DL-MAP IE is not last DL-MAP IE, then this mobile subscriber station begins to check next DL-MAP IE from step S17.

In the method for prior art, each mobile subscriber station need to read the MAP message that is forwarded to another mobile subscriber station, sends address information with ACK or the NACK signal that obtains himself distributing.If any one of previous message makes a mistake in the respective handling process, then this mobile subscriber station can not be learnt the transmission address information that himself is distributed.

Yet according to the present invention, each mobile subscriber station need not to read the MAP message that is forwarded to another mobile subscriber station.On the contrary, it reads the MAP message that is forwarded to himself, to obtain the transmission address information that himself is distributed.

Therefore, by configuration messages, to be independent of other message to mobile subscriber station distribute data burst, if a MAP message makes a mistake, then the present invention can indicate ACK or the NACK signal of the data burst of inerrancy MAP message.Therefore, the present invention can reduce the expense of retransmitting all data, can send separately misdata, and can send continuously error-free received data.

Although described the present invention in conjunction with mobile communication, the present invention can also be applied to adopt any wireless communication system such as the mobile device of the PDA that has equipped performance for wireless communications and laptop computer.

Utilize and adopt standard program and/or engineering to produce manufacture method, equipment or the product of software, firmware or their combination in any, can realize the preferred embodiment.Term " goods " with hardware logic (for example refers to as used herein, integrated circuit (IC) chip, field programmable gate array (FPGA), application-specific integrated circuit (ASIC) (ASIC) etc.) or computer-readable medium is (for example, magnetic storage medium (for example, hard disk drive, floppy disk, tape etc.), the form of optical memory (CD-ROM, CD etc.), volatibility and nonvolatile semiconductor memory member (for example, EEPROM, ROM, PROM, RAM, DRAM, SRAM, firmware, FPGA (Field Programmable Gate Array) etc.) code or the logic that realize.

Code in processor access and the object computer computer-readable recording medium.The code of realizing preferred embodiment can also be by transmission medium or can access from file server by network.In this case, realize on it that goods of this code can comprise transmission medium, for example, Network transmission line, wireless transmission medium, the signal by spatial, radio wave, infrared signal etc.Certainly, those skilled in the art understand, without departing from the present invention, can carry out many modifications to this configuration, and these goods can comprise any information bearing medium known in the art.Preferably realize the present invention at the mobile communication equipment that comprises parts shown in above-described processor and Fig. 6.

Above-described embodiment and advantage only are illustrative, and should not be considered as the present invention are construed as limiting.Can be applied to easily the equipment of other types in this content of telling about.The description that the present invention is done is intended to say something, and does not limit the scope of this claim.Many replacements, modifications and changes are apparent for those skilled in the art.In this claim, device adds the function statement and is intended to contain structure described here, carrying out described function, and not only comprises structural equivalents, and comprises equivalent structure.

Commercial Application

The present invention can be applied to wireless communication system, for example, and BWA, mobile communication system or portable Internet system etc.

Claims

1. method that is used for the support h-arq (HARQ) in the mobile radio station of orthogonal frequency division multiple access system, the method comprises:

Receive map message from the base station, this map message comprises the information of the position in indicating downlink link data district, the down link data burst of distributing to this mobile radio station will be received by this down link data district, wherein this map message further comprises the information of the position that is used to indicate the ack/nack signal timeslice, the ack/nack signal that responds this down link data burst will be transmitted by this ack/nack signal timeslice, and this ack/nack signal timeslice is arranged in the ack/nack signal district of up link; And

By reading the map message of receiving, be identified as the position of the ack/nack signal timeslice of mobile radio station distribution.

2. method according to claim 1, wherein, the information of the position in this indicating downlink link data district comprises the two-dimensional coordinate value that is mapped on frequency axis and the time shaft.

3. method according to claim 1, wherein, this map message is SUB-DL-ULMAP message.

4. method according to claim 1, wherein, this information that is used to indicate the position of ack/nack signal timeslice comprises the deviation value of the very first time sheet that leaves the ACK/NACK zone.

5. method according to claim 1, wherein, this information that is used to indicate the position of ack/nack signal timeslice comprises the two-dimensional coordinate value that is mapped on frequency axis and the time shaft.

6. method according to claim 4, wherein, this deviation value is the start address of first down link data burst at least one down link data burst in this map message.

7. mobile radio station that is used at the support h-arq (HARQ) of orthogonal frequency division multiple access system, this mobile radio station comprises:

Receiver, it is used for from base station reception map message, this map message comprises the information of the position in indicating downlink link data district, the down link data burst of distributing to mobile radio station will be received by this down link data district, wherein this map message further comprises the information of the position that is used to indicate the ack/nack signal timeslice, the ack/nack signal that responds this down link data burst will be transmitted by this ack/nack signal timeslice, and this ack/nack signal timeslice is arranged in the ack/nack signal district of up link; And

Processor, it is identified as the position of the ack/nack signal timeslice of mobile radio station distribution by reading the map message of receiving.

8. mobile radio station according to claim 7, wherein, the information of the position in this indicating downlink link data district comprises the two-dimensional coordinate value that is mapped on frequency axis and the time shaft.

9. mobile radio station according to claim 7, wherein, this map message is SUB-DL-UL MAP message.

10. mobile radio station according to claim 7, wherein, this information that is used to indicate the position of ack/nack signal timeslice comprises the deviation value of the very first time sheet that leaves the ACK/NACK zone.

11. mobile radio station according to claim 7, wherein, this information that is used to indicate the position of ack/nack signal timeslice comprises the two-dimensional coordinate value that is mapped on frequency axis and the time shaft.

12. mobile radio station according to claim 7, wherein, this deviation value is the start address of first down link data burst at least one down link data burst in this map message.