CN101188800B - Efficient acknowledgement messaging in wireless communications - Google Patents

Abstract

Techniques and systems for efficient acknowledgement for control signaling messages in wireless networks such as OFDM/OFDMA systems.

Description

Efficient acknowledgement messaging in the radio communication

Priority request

The application requires the priority of following application: (1) submit on June 14th, 2006, name is called the 60/813rd, No. 795 U.S. Provisional Application of " be used for give information and reply at the OFDMA wireless network effective ways (EfficientMethods for Providing Message Acknowledgement in OFDMA WirelessNetwork) "; And (2) submit on March 5th, 2007, name is called the 60/893rd, No. 045 U.S. Provisional Application of " be used for give information and reply at the OFDMA wireless network effective ways (Efficient Methods for Providing Message Acknowledgement inOFDMA Wireless Network) ".

Above-mentioned two disclosed contents of patent application are incorporated this paper conduct part wherein by reference into.

Background technology

The application relates to the radio communication that in the wireless communication system that comprises based on OFDM (OFDM) and OFDM access (OFDMA) system, realizes.

Wireless communication system uses base station network and the wireless device of in system, having registered service.The wireless signal that is loaded with data (like voice data and other data contents) is all sent to wireless device in each base station.Can comprise the preposition load (overhead load) that is used for various telecommunication management functions from these signals of base station thus make the signaling of time domain and frequency domain synchronous, wherein preposition load comprises the information of the cell sector that allows the wireless device identifications base station.Each wireless device was handled the information in the expense load of each signal of receiving before deal with data.

Be based on the frequency orthogonal property of a plurality of subcarriers based on the communication system of OFDM and OFDMA, and can be realized as can be for broadband wireless communications obtains a plurality of technical advantages, for example anti-multipath decay and disturbing.In wireless communication system based on OFDM or OFDMA, through the geographic area being divided into a plurality of sub-districts the wireless service to this geographic area is provided, the sub-district that wherein is divided into can further be divided into two or more cell sectors.In the base station of the middle position of the conceptive sub-district separately that is arranged on its coverage through its down link that sends (DL) wireless signal to mobile subscriber station (MMS) transmission information.Mobile subscriber station also is known as mobile radio station (MS) or wireless station.Mobile radio station transmits information through uplink wireless signals to its serving BS.

The wireless coverage of the network of fixed base stations can be restricted owing to various factors.Various structures can hinder the wireless signal of some base station.For example, high building can shield the wireless signal from the base station to special region, thereby produces the blind area that is not supposed to.At the edge of wireless area, signal strength signal intensity will die down, and therefore increase the error rate in the radio communication.A method that alleviates above problem and other restrictions is the quantity that in given coverage, increases the base station.In an enforcement of the method, can in some fixing base station, dispose one or more relay stations (RS), with trunking traffic signal between subscriber station and base station, thereby expand the coverage area and improve the message capacity and the communication quality of base station.Relay station can be fixing transceiver or ambulatory transceiver station, and this depends on the actual conditions of disposing above-mentioned relay station.Before arriving serving BS, subscriber station signal can be skipped one or more relay stations.IEEE802.16j proposal standard has proposed multi-hop relay (MR) pattern, improves user's coverage and service to use relay station.Multi-hop relay wireless network according to the IEEE802.16j standard comprises MR base station (MR-BS), to support the multi-hop relay pattern.

Summary of the invention

In one aspect, the wireless communication system of describing in this application provides the total effective response that is used to control signaling message with technology.Said acknowledgement mechanism can be used for replying the various message that received by a wireless network entity that between two wireless network entity (for example base station, subscriber station and relay station), communicates.Because the unreliability of on-air radio transmission, host-host protocol can be used to guarantee the transmission of signaling message reliably.Replying of message sink is the pith in any reliable transport protocol.The acknowledgement mechanism of describing among the application can be embodied as the complexity of preserving air bandwidth and reducing agreement.Total (generic) response message is designed to replace the independent response message of each signaling message.On the other hand; The application described the subscriber station that from multicast/broadcast (MBS), comprised to the base station, effective uplink feedback mechanism; So that to the channel situation of base station report subscriber station, thereby in OFDM and OFDMA wireless communication system, select suitable burst to dispose (burst profile) during through base station transmits MBS data.

The application comprises two kinds of enforcements of response message, and for example the network entity of subscriber station and relay station utilizes said response message to acknowledge receipt of special signaling message.Utilize these mechanism, the base station can obtain the affirmation of message transmission and carry out message retransmission where necessary.In addition, two kinds of mechanism is designed to reply total (generic) acknowledgement mechanism of various different signaling messages.

First kind of mechanism is based on replying of header.Utilization should mechanism, in the signaling header, carries acknowledgement messaging, and said signaling header uses minimum air capacity.In a kind of enforcement of replying based on header, when subscriber station or relay station received the signaling message that need reply, the header of replying that subscriber station or relay station will comprise the message that is received was sent to the base station.Possible re-transmission is confirmed according to lacking with retransmission timer of replying in the base station.

Second kind of mechanism is based on replying of message.In a kind of enforcement of second kind of mechanism, when signaling message that subscriber station or relay station reception need be replied, total response message of replying that subscriber station or relay station will comprise the message that is received is sent to the base station.Although the air bandwidth that this mechanism needs is more than the acknowledgement mechanism based on header, message basedly reply permission and in replying, increase other guide neatly, the sender who for example is used for safeguard protection verifies content.Possible re-transmission is confirmed according to lacking with retransmission timer of replying in the base station.

Various embodiment are described below.In one embodiment, a kind of being used for may further comprise the steps in wireless OFDM/OFDMA system method of replying that gives information: when subscriber station or relay station when the base station of confirmation request receives signaling message, said subscriber station or relay station are produced reply; And utilize header to carry said content of replying.When the base station of sending message required to reply, the base station can distribute uplink bandwidth to send response header to allow subscriber station or relay station, and need not subscriber station or relay station bandwidth on demand.Possible re-transmission is also confirmed according to lacking with retransmission timer of replying in the base station.

In another embodiment, a kind of being used for may further comprise the steps in wireless OFDM/OFDMA system method of replying that gives information: reply when subscriber station or relay station produce said subscriber station or relay station when the base station of confirmation request receives signaling message; And utilize message to carry response content, comprise the possible sender's checking that is used for safeguard protection in the said response content.When the base station of sending message requires to reply, the size of base station definite response message in advance, and distribute uplink bandwidth to send response message to allow subscriber station or relay station, and need not subscriber station or relay station bandwidth on demand.Possible re-transmission is also confirmed according to lacking with retransmission timer of replying in the base station.

Described and be used for a give information embodiment of the method for always replying that receives in wireless OFDM/OFDMA system.Said method comprises that when subscriber station receives message from the base station, handling subscriber station makes its generation reply (ACK) signal; And for subscriber station provides pre-assigned uplink resource so that ack signal is sent to the base station, and need not to send the subscriber station request that is used to send said answer signal to said base station.Being used for jumping give information another embodiment of the method for always replying that receives of relay system for a long time at wireless OFDM/OFDMA may further comprise the steps: when relay station receives the message that base station or superordinate relay stations send, handle relay station and make its generation reply (ACK) signal; And pre-assigned uplink resource is provided for said relay station, so that said ack signal is transferred to base station or superordinate relay stations, said relay station need not to send request for sending said answer signal.Be used for may further comprise the steps: handle subscriber station or relay station and produce and reply (ACK) signal at the give information another embodiment of the method for always replying that receives of wireless OFDM/OFDMA system; So that a plurality of message to said subscriber station receives from the base station are replied; Wherein when a message in said a plurality of message is received by said subscriber station or relay station, generate said ack signal.

The communication system of implementing above-mentioned technology has also been described.In one embodiment, said system comprises base station, subscriber station and IAD, and wherein described total acknowledgement mechanism is implemented by base station and subscriber station.

In another embodiment, said system comprises base station, subscriber station and IAD, and wherein described total acknowledgement mechanism is being implemented between base station and the relay station or between base station and the subscriber station.

The exemplary enforcement and the various characteristic of two kinds of acknowledgement mechanisms have been described in accompanying drawing, embodiment and claim in further detail.

Description of drawings

Fig. 1 shows the embodiment of OFDM/OFDMA wireless communication system;

Fig. 2 shows the embodiment of OFDM/OFDMA radio communication mobile multi-hop relay system;

Fig. 3 shows the embodiment that between two wireless network entity, has the message flow of always replying signaling;

Fig. 4 shows the embodiment that replys signaling based on header;

Fig. 5 shows the message based embodiment that replys signaling;

Fig. 6 show between base station (BS) and the subscriber station (SS), be used to the exemplary flow process of sending message and replying; And

Fig. 7 shows the exemplary process of MR-BS during the MS sleep pattern.

Embodiment

Characteristics of wireless communication system are to change channel condition fast.Therefore, compare, trend towards introducing higher data-bag lost percentage with wire communication.Message transmission protocol can be used for guaranteeing the transmission of signaling message reliably.In one embodiment, after receiving the signaling message of transmitter, send response message, reliable host-host protocol can be provided through receiver.Because need reply for making system's true(-)running have many signaling messages, so when all defining response message for each signaling message, the existence of many signaling messages can bring complexity and redundancy.In addition, operation and the increase of function along be performed and increased system after the new signaling message that needs ACK for the first time in system need to define and increase new response message.Because possible restriction on the supported message number of system, such system is not flexibly, and possibly be difficult to stretch.The technology of describing among the application provides total relatively response message of appointment on pre-assigned uplink channel, is used for relay station or subscriber station through subordinate and the reception of message is made is replied.This response message technology can be used for providing flexibility and reduces complexity.

Therefore, can realize that a kind of being used for produce the method reply at wireless communication system, send mac header to comprise operating user stations to the base station, to reply the reception of the MAC administrative messag that sends the base station.Being used for producing the method for replying in multi-hop relay (MR) radio communication can comprise; The operation relay station to be sending mac header to base station or superordinate relay stations (it is trunk information between base station and relay station), thereby the reception of the MAC administrative messag that the base station is sent is replied.The MAC administrative messag can comprise sleep mode message.

Fig. 1 shows schematic OFDM and OFDMA wireless communication system 100.System 100 can comprise network base station (BS) 120, and wherein base station 120 spatially is distributed in the service area to be formed for the Radio Access Network of wireless subscriber station (SS) 110.SS 110 can be for carrying out any communication means of radio communication with base station 120, and can be embodied as the fixedly SS that moves SS or can in system, reorientate.The instance of stationary wireless device can comprise desktop computer and computer server.The instance of portable radio (being MSS) can comprise mobile radiotelephone, PDA(Personal Digital Assistant) and portable computer.

Base station 120 in the system 100 is conceptive wireless sets that are arranged in the center of sub-district and carry out radio communication through the SS of downlink radio signal and sub-district.Each BS120 can be designed to have directional antenna and produce two or more directed beams (beam), further each microzonation is divided into different unit.

Base station 120 is connected with the IP network of telecommunications company.As a concrete instance, the system 100 among Fig. 1 shows the IP network of the telecommunications company that comprises access network 141 and core network 142.As shown in the figure, access network gateway (AGW) 150 can be used for providing the interface between telecommunications company's IP network 142 of telecommunications company's IP network 141 and core network of access network.

IEEE802.16-2005 has defined the air-interface standard of OFDM as shown in Figure 1 and OFDMA Radio Network System.In IEEE802.16-2005, replying of MAC administrative messag is designed to one of each signaling message independent response message.For example, DSA-RSP message is by the DSA-ACK acknowledgement messaging, and DSC-RSP message is by the DSC-ACK acknowledgement messaging.In addition, REQ message is by RSP message authentication and response.Yet, have some important signaling messages possibly be sent out and not reply.As an instance, BS can send uncalled MOB_SLP-RSP and MOB_SCN-RSP.Through MOB_SLP-RSP message, BS can activate or stop using one group of power saving grade (power saving class) and change their parameter.Through MOB_SCN-RSP message, BS can require MS to begin to scan the BS of one group of vicinity and report its scanning result.Yet, any the definition response message in unpromising these two the uncalled RSP message.After BS sends MOB_SLP-RSP or MOB_SCN-RSP message, there is not mechanism to find that whether this message received by MS and the reaction of MS.Because BS can not suppose the reception or the possible reaction of MS of message, BS possibly use uncalled MOB_SLP-RSP or MOB_SCN-RSP message to ask the variation in park mode or the scanning process hardly.Therefore, MOB_SLP-RSP and MOB_SCN-RSP need response message.

Still as defining among the IEEE802.16-2005; When the response message of DSA-ACK was for example sent in SS decision, SS need apply for uplink bandwidth allocation through during the ranging slot (ranging slot) of the one-period property on the range channel, sending bandwidth request ranging code (ranging code).When BS received bandwidth request ranging code, it distributed uplink resource to transmit its bandwidth request header for SS.After receiving bandwidth request header, BS is that SS distributes uplink resource to transmit DSA-ACK message.Bandwidth request procedure has been introduced potential time-delay in the DSA-ACK transmission of messages, and has prolonged the connection setting up procedure of handling DSA message.Therefore, this answering possibly be invalid.

Fig. 2 shows schematic OFDM and the OFDMA wireless communication system 200 with mobile multi-hop relay station.System 200 comprises the base station network 230 that spatially is distributed in the service area with the radio access network that forms wireless subscriber station (SS) 210 and relay station (RS) 220.Each SS210 has and characteristic and function identical in wireless system 100.Except provide direct radio to insert for SS210, the BS230 in the system 200 also can be used for controlling the network of RS220, to expand its coverage and to increase its capacity.According to the actual conditions of disposing, RS220 can be fixing transceiver or ambulatory transceiver station.RS220 is provided to the radio access of SS210 from the data flow of BS230 through relaying.In addition, RS220 can be provided to the radio access of other RS230 through the data flow that relaying receives from BS230.Each relay station 220 is regarded the jumping of one on the communication path from BS230 to SS210 (hop) as.Communication path with a plurality of relay stations 220 is regarded the multi-hop relay station as.Other network element, the IP network 241/242 of access network gateway (AGW) 250 and telecommunications company for example, identical with definition in the system 100.

Multihop network among Fig. 2 has upper-level BTS and subordinate base station.Relay station 220A and 220B are the subordinate base station of BS230, because BS230 is connected with network and as the gateway of relay station 220A and 220B other part in the network.Therefore, BS230 is the upper-level BTS of relay station 220A and 220B.In addition, under the control of upper-level BTS BS, can have relationship between superior and subordinate between the relay station.For example, relay station 220B is the subordinate base station of relay station 220A, because relay station 220B communicates by letter with other part in the network with BS230 through relay station 220A.Therefore, relay station 220A is the upper-level BTS of relay station 220B.In this environment, BS and relay station can be classified as upper-level BTS and subordinate base station based on their relativeness.Like this, BS230 is the upper-level BTS of relay station 220A and 220B, but and relay station 220A is the subordinate base station of BS230 is the upper-level BTS of relay station 220B.

Described in 16j Baseline802.16j-06/026r2, in the MR network, exist centralized or during distributed scheduling, park mode is by the control of MR-BS central authorities.No matter be centralized scheduling or distributed scheduling; The whole MOB_SLP-REQ message that generated by the MS that is connected on the RS will be relayed to MR-BS; And MR-BS will be responsible for generating the MOB_SLP-RSP message by the RS relaying, with in response to MOB_SLP-REQ or uncalled message.Through centralized scheduling, MR-BS controls whole radio resource scheduling and distributes.MR-BS ratifies the MS park mode and determines the relevant parameter of MS park mode, the for example duration of sleep window and audit window.RS only relays sleep mode message, and need not safeguard any information of park mode MS.Through distributed scheduling, RS has the function of radio resource scheduling and MAC distribution.The relevant parameter of MR-BS approval MS park mode and definite MS park mode, the for example duration of sleep window and audit window.Yet, carrying out the distributed radio scheduling of resource in order to support RS, RS must know MS park mode information, for example sleep window, audit window etc.Based on these information, RS can carry out the operation correct to MS on time.

For promoting the centralized management of park mode in the distributed MR network, need RS correctly to receive the information of MS park mode.BS is done relatively simply to revise, and mac header can be sent to MR-BS by RS, so that replying the reception of MOB_SLP-RSP to be provided.

IEEE802.16j-06/026r3 has defined the air-interface standard of OFDM as shown in Figure 2 and OFDMA wireless communication system.In IEEE802.16j-06/026r3, replying of MAC administrative messag is designed to that each signaling is had an independent response message.For example MS_SCN-INF is replied by MS_SCN-ACK, and MS_INFO-DEL is replied by MS_DEL-ACK.Equally, REQ message is by RSP message authentication and response.Yet, also have some important signaling messages possibly be sent out and not reply.As an instance, BS can send uncalled SBC-RSP message and give RS, thinks that multicast/broadcast (MBS) data dispatch upgrades its stand-by period.RS depends on and receives the correct stand-by period so that the transmission of its MBS data and BS are synchronous with other RS.Because do not reply for the SBC-RSP message definition, BS can not confirm that RS receives SBC-RSP message.If lose in the process that SBC-RSP aloft transmits, then RS will send the MBS data in the frame in mistake under the complete ignorant situation.In addition, BS is not apprised of losing of message, therefore can not the situation of resend messages to correct a mistake.As another instance, Relay_Frame_configuration message, MR_NBR-INFO message and CID_ALLOC-IND message all be need reply, BS is to the important signaling message of RS.Under these all situations, all there is not definition to reply among the IEEE802.16j-06/026r3.

Fig. 3 shows the embodiment of the message flow with common ACK signaling between BS and the SS/RS.In an embodiment shown in Figure 3, when BS310 sent BS_MSRS_MSG_1331 to SS/RS320, BS310 can comprise the indication of affairs ID (1) and request ACK in BS_MSRS_MSG_1331.Affairs ID is used for distinguishing the different messages with identical message ID (being BS_MSRS_MSG_1341) from BS310 by MR/RS320.If asked ACK, BS310 distributes uplink resource for SS/RS320 alternatively, to transmit by the ACK signaling shown in the label 332.Uplink resource is allocated in advance to SS/RS and is used to send the ACK signaling, and therefore after the message that receives from base station or higher level BS, the ACK signaling just can directly be sent with the time delay of minimum by BS or RS.BS310 also starts retransmission timer when the ACK that waits for from SS/RS320.When MR/RS320 receives BS_MSRS_MSG_1331, send ACK333 at pre-assigned time slot.ACK333 comprises the message id of its message of replying (being BS_MSRS_MSG_1), and is included in the affairs ID (being TRAN ID1) in this message.After receiving ACK333, BS310 just stops to be used for the retransmission timer of BS_MSRS_MSG_1331.

In another embodiment shown in Figure 3, BS310 is that SS/RS320 sends the BS_MSRS_MSG_1341 with TRANID2, and pre-assigned uplink resource 342.When the ACK that waits for from SS/RS320, BS310 starts the retransmission timer that is used for BS_MSRS_MSG_1341.Yet in this embodiment, message BS_MSRS_MSG_1341 aloft loses in the transmission course.In the time 343, the retransmission timer that is used for BS_MSRS_MSG_1341 expires (expired), BS310 resend have be included in BS_MSRS_MSG_1341 in the BS_MSRS_MSG_1344 of identical transaction id (being TRAN ID2).BS310 restarts retransmission timer when resending BS_MSRS_MSG_1.In addition, BS310 is that SS/RS320 distributes uplink resource 345.SS/RS is sent to BS310 with ACK346 after receiving BS_MSRS_MSG_1344.ACK346 comprises the transaction id (being TRAN ID2) that is comprised in message id and this message of the message (being BS_MSRS_MSG_1) of replying.BS310 makes the retransmission timer that is used for BS_MSRS_MSG_1344 stop after receiving ACK346.

ACK signaling shown in Figure 3 can be implemented in every way.Describe two embodiment that the ACK signaling is implemented in the part below in detail.

Fig. 4 shows the embodiment based on the ACK signaling of header.As defined in many air-interface standards (for example IEEE802.16), the packet in media interviews controls (MAC) layer comprises MAC layer header and optional payload.MAC layer-management message is regarded as payload.Mac header can comprise identifier, header check and and other header relevant informations of sender.The size of mac header is general less and fix.Mac header can be used for carrying signaling information rather than MAC message, to preserve aerial capacity.Fig. 4 shows the embodiment of the mac header of the ACK signaling information with compression.The ACK signaling information comprises type of message, confirmation codes and transaction id.Type of message and transaction id are used for discerning uniquely the message of being replied.The type of message of the message that type of message is set to be replied, and transaction id is set to the transaction id that from the message of being replied, obtains.In order to hold the mac header of limited size, the transaction id that is comprised in the mac header can be compressed format, and promptly it can only have the least significant bit of the transaction id that is received.Confirmation codes is included in during mac header replys, with indication SS or the RS operation in response to the message that is received.The schematic value of confirmation codes is for accepting (Accept) and refusal (Reject).The MAC response message can be a unicast messages.

Fig. 5 shows the embodiment of message based ACK signaling.When message based ACK signaling adopted a plurality of air bandwidth to transmit, its permission was carried into BS with additional information, because there is not strict message size restriction.As shown in Figure 5, the ACK signaling information in the message comprises type of message, confirmation codes, transaction id and safe context.Type of message and transaction id are used for discerning uniquely the message of being replied.The type of message of the message that type of message is set to be replied, and transaction id is set to the transaction id that from the message of being replied, obtains.Confirmation codes is used for indicating SS or the RS operation in response to the message that is received.The schematic value of confirmation codes is for accepting (Accept) and refusal (Reject).Safe context is used for verifying the SS of transmission ACK message or the identity of RS.Safe context be exemplified as the ashed information identifying code (HMAC) that in the IEEE802.16 standard, uses.

Fig. 6 shows and between BS and SS, is used to send message and the exemplary flow process of replying.Shown in figure, BS sends MOB-SLP_RSP (sleep response message) to activate power saving grade I.After sending MOB-SLP_RSP message, BS also distributes uplink bandwidth to send response header and wait acknowledge for MS.MS receives MOB_SLP-RSP from BS, and sends the ACK header, and the ACK type of message is set to MOB_SLP-RSP in this ACK header, and confirmation codes is changed to 0b0000 with the message of accepting confirmation.When BS when MS receives response header, will activate power saving grade I and change the MS dispatching algorithm, sleep pattern is activated simultaneously.

Fig. 7 shows the illustrative steps of MR-BS in the process of MS sleep pattern.For the MS/SS that is connected in MR-BS through the RS with distributed scheduling, the MS sleep pattern can be by following operation.All will be relayed to MR-BS by the MOB_SLP-REQ message that the MS that is connected in RS produces.MR-BS will be responsible for generating the MOB_SLP-RSP message by the RS relaying, with in response to MOB_SLP-REQ or uncalled message.When receiving MOB_SLP-RSP, RS will handle and storage package is contained in the information in the message, and send the ACK type of message to MR-BS and be changed to 51 response header, thus the reception of indicating MOB_SLP-RSP.RS will be to MS relaying MOB_SLP-RSP.MR-BS will start timer T49 behind RS transmission MOB_SLP-RSP.Timer T49 is the time that is used for after sending MOB_SLP-RSP MR-BS or RS wait acknowledge header.If the T49 timer expired before receiving response header, then MR-BS will transmit MOB_SLP-RSP message again to RS.If receive two MOB_SLP-RSP message at the RS place, then RS will send response header and not further relay message to MR-BS.

For multi-hop relay, after receiving MOB_SLP-RSP, RS will send response header to its higher level RS, thus the reception of Indication message.If before the T49 timer expires, do not receive response header, higher level RS will transmit MOB_SLP-RSP message again.If receive two MOB_SLP-RSP message at the RS place, RS will send response header and not further relay message to its higher level RS.

In this is implemented, can above-mentioned technology and its variation be embodied as computer software instructions or firmware instructions.This instruction can be stored in have one or more can by in the device of the storage medium of Computer Processing or be stored in be connected to one more one of multicomputer or more can be by the memory device of Computer Processing.In operation, this instruction is carried out by for example one or more computer processors, thereby makes machine accomplish above-mentioned functions and operation.For example, the technology of replying signaling and accomplishing transmission again that is used to handle from SS or RS can be performed as the computer instruction in the control module that is stored in base station or control base station.Be used for producing the technology of replying signaling and can be performed as the computer instruction that is stored in subscriber station or the relay station through MAC message or header.

Though detailed description has in this article comprised many details, this should not be counted as the restriction to this paper invention scope required for protection or claim scope, but the feature description detailed to concrete embodiment.In the embodiment of a plurality of separations, some characteristic of describing in this specification also can combine to implement in single embodiment.On the contrary, the various characteristics of in the context of single embodiment, describing also can be implemented in the embodiment of a plurality of separations or in the suitable arbitrarily son combination.In addition; Each characteristic can be described to can from combine, separate in some instances as one or more characteristics in the desired combination hereinbefore; And desired combination can be instructed and be the variation that son combines or son combines, some combine with in addition initial requirement in work.Equally, although each operation is described with specific order in the accompanying drawings, this should not be understood that these action needs are carried out with the certain order or the sequential order that illustrate, maybe need carry out the operation shown in all in order to realize expected result.

This paper only discloses embodiment and executive mode seldom.Variation, modification and improvement and other executive modes that the foregoing description and executive mode are carried out all can obtain based on the disclosed content of this paper.

Claims (26)

1. one kind is used for comprising in the method that wireless OFDM/the OFDMA system is replied message sink:

When subscriber station receives message from the base station, handle said subscriber station to generate answer signal;

The base station is that said subscriber station provides pre-assigned uplink resource; And

Said subscriber station transfers to said base station through said uplink resource with said answer signal, and need not to send the subscriber station request that is used to send said answer signal to said base station.

2. the method for claim 1 comprises that the mac header that use is transmitted carries the said answer signal with response message on said pre-assigned uplink resource.

3. method as claimed in claim 2 comprises:

Said mac header is configured so that it comprises the type of message of the message that is received, thus the message that identification is replied.

4. method as claimed in claim 2 comprises:

Said mac header is configured so that it comprises transaction id, thus the different editions of the message of the identical message type that received of identification, and wherein said transaction id is set to from by the transaction id that obtains the message of replying.

5. method as claimed in claim 4 comprises:

Only comprise least significant bit in the said mac header and said transaction id is compressed through making.

6. method as claimed in claim 2 comprises:

Make in the said mac header to comprise confirmation codes, to indicate of the operation of said subscriber station in response to the message of being replied.

7. the method for claim 1 comprises:

Utilize response message to carry response message as said answer signal.

8. method as claimed in claim 7 comprises:

Make the type of message that comprises the message that is received in the said response message, to discern the message of being replied.

9. method as claimed in claim 7 comprises:

Make in the said response message to comprise transaction id, with the different editions of the message of the identical message type that received of identification, wherein said transaction id is set to the transaction id that from said message of being replied, obtains.

10. method as claimed in claim 7 comprises:

Make in the said response message to comprise confirmation codes, to indicate of the operation of said subscriber station in response to the message of being replied.

11. method as claimed in claim 7 comprises:

Make in the said response message to comprise safe context, send the identity of the subscriber station of said response message with checking.

12. one kind is used for comprising in the method that wireless OFDM/the OFDMA multihop relay system is replied message sink:

When relay station receives the message of being sent by base station or superordinate relay stations, handle said relay station to generate answer signal;

The base station is that said relay station provides pre-assigned uplink resource; And

Said relay station transfers to said base station or said superordinate relay stations through said uplink resource with said answer signal, and need not to send the relay station request that is used to send said answer signal to said base station.

13. method as claimed in claim 12 comprises and uses mac header to carry said response message.

14. method as claimed in claim 13 comprises making the type of message that comprises the message that is received in the said mac header, to discern the message of being replied.

15. method as claimed in claim 13 comprises:

Make in the said mac header to comprise transaction id, thus the different editions of the message of the identical message type that received of identification, and wherein said transaction id is set to from by the transaction id that obtains the message of replying.

16. method as claimed in claim 15 comprises:

Only comprise least significant bit in the said mac header and said transaction id is compressed through making.

17. method as claimed in claim 13 comprises:

Make in the said mac header to comprise confirmation codes, to indicate of the operation of said relay station in response to the message of being replied.

18. method as claimed in claim 12 comprises and utilizes response message to carry response message.

19. method as claimed in claim 18 comprises:

Make the type of message that comprises the message that is received in the said response message, to discern the message of being replied.

20. method as claimed in claim 18 comprises:

Make in the said response message to comprise transaction id, with the different editions of the message of the identical message type that received of identification, wherein said transaction id is set to from by the transaction id that obtains the message of replying.

21. method as claimed in claim 18 comprises:

Make in the said response message to comprise confirmation codes, to indicate of the operation of said relay station in response to the message of being replied.

22. method as claimed in claim 18 comprises:

Make in the said response message to comprise safe context, send the identity of the relay station of said response message with checking.

23. one kind is used for comprising in the method that wireless OFDM/the OFDMA system is replied message sink:

Handle subscriber station or relay station and generate answer signal, reply, wherein, generate said answer signal when a message in said a plurality of message during by said subscriber station or relay station reception with a plurality of message that said subscriber station is received from the base station;

The base station is that said subscriber station or relay station provide pre-assigned uplink resource; And

Said subscriber station or relay station transfer to said base station through said uplink resource with said answer signal, and need not to send the subscriber station request that is used to send said answer signal to said base station.

24. method as claimed in claim 23 comprises:

After said message is sent to said subscriber station or relay station, handle said base station and think that said subscriber station or relay station distribute said pre-assigned uplink resource, to send said answer signal.

25. method as claimed in claim 23, wherein a part of mac header is used to carry replying in the said answer signal.

26. method as claimed in claim 23 comprises and uses response message to carry the response message as said answer signal.

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