CN101288249B - Method and apparatus for allocating transmission period in a wireless communication system - Google Patents
Method and apparatus for allocating transmission period in a wireless communication system Download PDFInfo
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Abstract
Method and apparatus is provided for efficiently allocating transmission period in a wireless network system. Access point transmits a PSMP frame indicating downlink period provided to each station (STA) and a minimum amount of uplink period allocated to each STA, and at least one sub PSMP frame indicating uplink period provided for an STA that transmitted a resource request message for remaining queued data in the uplink period indicated by PSMP frame. If the uplink period is insufficient to transmit the queued data, the STA transmits data unit including a part of the queued data and resource request message for the remaining queued data in the uplink period. After transmitting the resource request message, the STA receives sub PSMP frame after the full period indicated by the sub PSMP frame, and transmits remaining queued data to the AP in the uplink period indicted by the sub PSMP frame.
Description
Technical field
The present invention relates to a kind of method and apparatus and system thereof that in the transmission frame period of Radio Network System, distributes transmission period effectively.
Background technology
Along with the expansion of recent development of wireless communication technology and the wireless device that causes, to having the demand that increases via the high speed of Radio Link, highly reliable transfer of data.Exploitation consists essentially of website (STA) and access point (AP) with the wireless lan (wlan) that satisfies this demand, and STA is the mobile data communication device, AP can with the STA swap data.The AP and the STA that are positioned at identical wireless service coverage are called as Basic Service Set (BSS).
Particularly, the wlan system of improvement is realized high-throughput through adopting multiple-input, multiple-output (MIMO) technology (using a plurality of transmitting antennas and a plurality of reception antenna) and OFDM (OFDM) technology.In this wlan system, the STA that is positioned at a wireless service coverage area uses and sends or receive data from the AP assigned radio resource.In this case, AP is with the form distributing radio resource of phase resource (phase resource), and term used herein " phase resource " is meant that STA or AP can send the time period of data.
Fig. 1 is illustrated in the structure of the transmission frame period in the typical wlan system.
With reference to Fig. 1, in the transmission frame period 100 with regular length of in system, confirming, AP transmission indication is at MAP (mapping) frame 110 of the phase resource allocation of whole transmission frame period 100.MAP frame 110 comprises down link MAP 120 and up link MAP 122, and down link MAP 120 indication AP can send the time period of data, and up link 122 indication STA can send the time period of data.Down link MAP 120 comprises the amount field 130 and at least one STA information field of confirming based on the amount field 130 of STA 132 of STA.Similarly, up link MAP 122 comprises the amount field 134 and at least one STA information field of confirming based on the amount field 134 of STA 136 of STA.STA information field 132 and 136 comprises that indication has respectively distributed the STA id field 140 and 144 of downlink transmission time section and the STA of up link time period, the time migration field 142 and 146 that the time migration of STA is distributed in indication.
Distributed the STA of the time period in the MAP frame 110 in the time period by corresponding STA information indication of downlink transmission time section 112, to receive data, and in the time period of up link time period 114, sent data by corresponding STA information indication.STA except the time period of time period of sending MAP frame 110 and 110 indications of MAP frame At All Other Times section in keep park mode.Can insert the competition time period 116 afterwards up link time period 114 by at least one STA based on competition.
By this way, AP estimates each STA required stock number in a transmission frame period 100, and estimates to distribute up link time period and downlink transmission time section according to this.Yet, when AP has over-evaluated the required stock number of STA, wasted Radio Resource, reduced data throughput performance.In this case, STA can not use assigned radio resource.In addition, owing to give specific STA with this resource allocation, so other STA can not re-use this resource.When AP had underestimated the required stock number of STA, before next transmission frame period at least, therefore resource from its needs to STA that can not distribute suffered the transmission delay and the shake of uplink service.The service quality (QoS) that transmission delay and effect of jitter STA need.In addition, if owing to the shortage of the resource of the distribution of STA makes the STA access contention time period 116, then in the competition time period, STA can not operate under park mode, so has wasted energy.
Therefore, confirm in the downlink transmission time section and the wireless communication system of up link time period that STA is required through scheduling that needs are a kind of to prevent the minimizing of data throughout and the waste of STA energy, and distributes the technology of time period exactly at AP.
Summary of the invention
In order mainly to solve the problems referred to above and/or shortcoming at least; And provide following at least advantage, the present invention that transmission period distribution method and equipment and the system thereof that minimizes the waste of STA energy under a kind of situation that in Radio Network System, does not reduce data throughout is provided.
The present invention provides a kind of method and apparatus and system thereof that comes to distribute neatly the transmission period of STA needs more than two MAP frame that in Radio Network System, use.
It is a kind of in Radio Network System that the present invention provides; After use MAP frame is distributed to STA with transmission period; Answer the request of STA in the time period, to use additional MAP frame accurate transmission period to be distributed to method and apparatus and the system thereof of STA at identical transmission frame.
According to an aspect of the present invention, a kind of method of in Radio Network System, distributing transmission period is provided.This method comprises: send multi-wheel energy saving (PSMP) frame that downlink transmission time section and initial uplink time period is offered at least one website (STA); Said at least one STA of downlink transmission time section that provides at the PSMP frame receives data, and sends data at said at least one STA of the initial uplink time period that the PSMP frame provides; When detecting when distribute sending the resource request message of at least one STA of the required additional resource of the uplink data of residue queuing from request; And after the time period, in transmission frame period, sending to provide is enough to send the sub-PSMP frame of the affix line link time period of the uplink data of the residue queuing of part at least in downlink transmission time section that the PSMP frame provides and initial uplink; In the affix line link time period that sub-PSMP frame provides, receive the uplink data of the residue queuing of said part at least from said at least one STA that sends resource request message.
According to a further aspect in the invention, a kind of method that in Radio Network System, receives the transmission period that distributes is provided.This method comprises: receive multi-wheel energy saving (PSMP) frame that downlink transmission time section and initial uplink time period are provided by access point (AP); If the initial uplink time period that the PSMP frame provides is not enough to the data of dispatcher queue, then data and the request in the transmitting section queuing of initial uplink time period divides the resource request message that is used in the additional resource that remains the data of lining up; In transmission frame period, receive the sub-PSMP frame that the affix line link time period is provided by AP, wherein, after all time periods that the PSMP frame provides, AP sends sub-PSMP frame; In the affix line link time period of sub-PSMP frame indication, the data that residue is lined up send to AP.
According to a further aspect in the invention, a kind of access point (AP) equipment that in Radio Network System, distributes transmission period is provided.AP equipment comprises: processor; Generation offers downlink transmission time section and initial uplink time period multi-wheel energy saving (PSMP) frame of at least one website (DTA); When detecting when distribute sending the resource request message of at least one STA of the required additional resource of the uplink data of residue queuing from request; And in downlink transmission time section that the PSMP frame provides and initial uplink after the time period, be created in the transmission frame period and the affix line link time period to be offered request distribute and be enough to send the sub-PSMP frame of said at least one STA of the uplink data of the residue queuing of part at least; Transceiver; In the downlink transmission time section that the PSMP frame provides, send the data to said at least one STA; And receive data from said at least one STA in the time period in initial uplink that the PSMP frame provides; In the affix line link time period that sub-PSMP frame provides, receive the uplink data of the residue queuing of part at least from least one STA that sends resource request message.
According to a further aspect in the invention, a kind of website (STA) equipment that in Radio Network System, receives the transmission period that distributes is provided.STA equipment comprises: processor; Analysis is provided multi-wheel energy saving (PSMP) frame of downlink transmission time section and initial uplink time period by access point (AP); And if initial uplink time period of providing of PSMP frame be not enough to the data of dispatcher queue, then produce the data cell of the resource request message of the additional resource that the data that comprise the part queuing and request divide the data that are used in the residue queuing; Transceiver; Receive the PSMP frame from AP; The PSMP frame is passed to processor, data cell is sent to AP, and in transmission frame period, receive the sub-PSMP frame that the affix line link time period is provided by AP in the initial uplink time period; And the data of residue at least partly being lined up in the affix line link time period that this sub-PSMP frame provides send to AP, and AP sends this sub-PSMP frame after all time periods that the PSMP frame provides.
According to a further aspect in the invention; A kind of Radio Network System is provided; This Radio Network System comprises: access point (AP); In the transmission frame period transmission downlink transmission time section and initial uplink time period are offered multi-wheel energy saving (PSMP) frame of at least one website (STA), and send the sub-PSMP frame of the affix line link time period of the uplink data that the residue queuing that is enough to send at least partly is provided; STA; If the initial uplink time period that the PSMP frame provides is not enough to the data of dispatcher queue; Then at the data of initial uplink time period transmitting section queuing and the resource request message of the additional resource of asking to divide the data that are used in the residue queuing; In transmission frame period, receive the sub-PSMP frame that the affix line link time period is provided by AP; And affix line link time period of sub-PSMP frame indication at least the data of the residue queuing of part send to AP, AP sends sub-PSMP frame after all time periods that the PSMP frame provides.
Description of drawings
Through the detailed description of carrying out below in conjunction with accompanying drawing, above and other objects of the present invention, characteristics and advantage will become more apparent, wherein:
Fig. 1 is the diagrammatic sketch that the structure of the transmission frame period in the typical wlan system is shown;
Fig. 2 A is the diagrammatic sketch that illustrates according to the configuration of wlan system of the present invention;
Fig. 2 B is the block diagram that the exemplary configurations of AP and each STA in the wlan system that shows among Fig. 2 A is shown;
Fig. 3 is the diagrammatic sketch that illustrates according to the structure of transmission frame period of the present invention;
Fig. 4 is the sequential chart according to the description of the power reduction effect of phase resource allocation of the present invention;
Fig. 5 is the diagrammatic sketch that illustrates according to exemplary accurate resource allocation of the present invention;
Fig. 6 is the flow chart that illustrates according to the operation of AP of the present invention;
Fig. 7 is the flow chart that illustrates according to the operation of STA of the present invention.
Embodiment
To describe the preferred embodiments of the present invention in detail with reference to accompanying drawing at present.In the following description, for the clear and concise known function that is herein incorporated and the detailed description of structure omitted.
Distribute relevant the present invention is characterized in that a plurality of MAP (mapping) are provided in transmission frame period frame with the transmission period in the Radio Network System, distribute to the time period of each station (STA) with indication access point (AP).The time period of distributing begins after the MAP frame is sent out immediately, and in transmission frame period, the MAP frame except a MAP frame is called as " follow-up MAP " (sub-MAP).Specifically, using the MAP frame after STA has distributed the minimum time section, wireless communication system according to the present invention answers the request of STA in identical transmission frame period, to use sub-MAP frame to distribute accurate resource to STA.
Although will describe the present invention with reference to wireless lan (wlan) system based on IEEE 802.11 standards; But it should be appreciated by those skilled in the art that; Under the situation that does not break away from the spirit and scope of the present invention, the distribution of phase resource (one side of the present invention) also can be applicable to have other wireless communication system of similar technique demand and channel format.
Fig. 2 A illustrates the configuration according to wlan system of the present invention.
With reference to Fig. 2 A; AP 202 and 210 each all be connected to cable network 200; A plurality of STA 204,206,208,212 insert its relevant AP 202 and 210 via IEEE 802.11 physics (PHY) layer with the Radio Link of controlling (MAC) agreement based on media interviews with 214, and transmit and receive data through a plurality of wireless channels.The STA 204 to 208 and the AP 202 that are positioned at same wireless service coverage 220 form a Basic Service Set (BSS).In an identical manner, be positioned at wireless service coverage 222 STA 212 and 214 and AP 210 form another BSS.The STA that is positioned at each BSS can be via corresponding AP swap data each other.AP 202 and 210 major function comprise data communication transmission, insert that other network (for example, cable network 200), roaming are supported, among the BSS synchronously, energy management support and being used for supports the control of the media interviews of BSS time-constrain service.
Fig. 2 B is the block diagram that is illustrated in the exemplary configurations of AP and each STA in the wlan system that shows among Fig. 2 A.AP and STA can comprise: display 232, processor 234, transceiver 236, input unit 238, memory 240, random-access memory (ram) 242, read-only memory (ROM) 244 and common bus 230.Provide the exemplary configurations that illustrates to be merely convenience.Although describe as the particular element of AP or STA and their operation at this with reference to Fig. 2 B, exemplary description does not limit the present invention.
With reference to Fig. 2 B, the transceiver 236 that is connected to the antenna (not shown) receives desired data, and is the corresponding digital data with the conversion of signals that receives.Processor 234 is in operating system (OS) and is included in the controller of operation under the control of other program among the ROM 244, and the data that produce of the operation of processor 234 and information stores are in RAM 242.
The main operation that is included in the processor 234 among the AP comprises: the generation of data/analyze, be positioned at the same wireless service coverage area and be connected to AP STA time period distribution, at least one MAP frame of time period that indication distributes generation and based on the operator scheme control of the time period of distributing to transceiver 236.Specifically; The MAP frame of the first of the processor 234 of AP through being positioned at transmission frame is distributed to STA with the minimum data rates of each STA or the minimum of resource; To send any STA of resource request (RR) message through the resource of distributing if exist; Then the sub-MAP frame of processor 234 through sending immediately after the duration in the sequence relevant with a MAP frame of transmission frame distributed to the STA that sends RR message in addition with the up link time period amount of request.It will be apparent to those skilled in the art that: term " ... immediately afterwards " is meant passing of the scheduled time in fact.
After the downlink transmission time section/up link time period of MAP frame indication expires, if necessary, then can send indication in addition at the downlink transmission time section of identical traffic frame period distribution and/or a plurality of sub-MAP frame of up link time period.The downlink transmission time section of sub-MAP frame indication and/or up link time period are after sub-MAP frame.
The main operation that is included in the processor 234 among the STA comprises: the generation/analysis of data, the generation of transmission frame and the MAP frame that receives based on the starting point from transmission frame are to the operator scheme control of transceiver 236.Just, processor 234 control transceivers 236, thus transceiver 236 receives the MAP frame in the starting point of each transmission frame from AP, and analyze this MAP frame and whether be included in wherein with the STA ID that confirms STA oneself.If the STA ID of STA oneself is included in the MAP frame; Then processor 234 will be about the downlink transmission time section of the distribution of the STA information relevant with STA ID indication and the information stores of up link time period in memory 240; Then wake the receiver and the transmitter of transceiver 236 respectively up in downlink transmission time section and up link time period, thus reception/transmission data.The receiver of transceiver 236 and transmitter get into park mode in the section At All Other Times except the time period of distributing.
Specifically, if the inadequate resource that AP distributes with the data of dispatcher queue, then the processor 234 of STA uses the uplink resource that distributes to come the data of transmitting section queuing.Simultaneously, processor 234 produces the RR message that is used to ask additional resource, and via transceiver 236 RR message is sent to AP.After sending RR message; Processor 234 is kept watch on after the initial uplink time period by the indication of MAP frame expires with the downlink transmission time section the sub-MAP frame that whether receives the resource of indicating additional allocation from AP; And when receiving sub-MAP frame, analyze the sub-MAP frame that receives.
Fig. 3 illustrates the structure according to transmission frame period of the present invention.Although adjacent with up link time period downlink transmission time section, in real system, receive switching and handle the possibility life period at interval for sending at frame this illustrate.
With reference to Fig. 3, in the transmission frame period with regular length 300, AP at first sends MAP frame 310a with the basic rate collection (comprising modulation scheme, encoding rate and data transfer rate) less than the normal speed collection.Make all STA in the service coverage area can both receive MAP frame 310a like this.In the beginning of communication, send MAP frame 310a periodically according to the set time section of confirming through the negotiation between AP and the STA (for example, being respectively 20ms and 10ms) for voice (VoIP) and Motion Picture Experts Group 4 (MPEG4).Send initialization transmission frame period 300 through MAP frame 310a.
For example; In order to indicate downlink transmission time section 312 and the phase resource allocation of the first up link time period 314a after the MAP frame 310a; MAP frame 310a comprises the down link MAP 320 and the first up link MAP 322a; Down link MAP 320 indication AP in downlink transmission time section 312 can send the time period of data, and first up link MAP 322a indication STA in the first up link time period 314a can send the time period of data.Down link MAP 320 comprises the amount field 330 of STA and at least one STA information field 332 of confirming based on the amount field 330 of STA.In an identical manner, the first up link MAP 322a comprises the amount field 334a of STA and at least one the STA information field 336a that confirms based on the amount field 334a of STA.
Each all comprises STA information field 332 and 336a: STA id field 340 and 344a, time migration field 342 and 346a and duration field 343 and 348a; STA id field 340 is indicated the STA that in the downlink transmission time section 312 and the first up link time period 314a, has been assigned with or provides the time period with 344a; The beginning of the time period of STA is distributed in time migration field 342 and 346a indication, the length of duration field 343 time period that indication distributes with 348a.Each at least a portion hardware address (MAC Address promptly) that all comprises the relevant identity of at least a portion (AID) of each STA or give each STA of STA id field 340 and 344a.The STA ID that indication is used for the time period of broadcast/multi broadcast data is arranged to particular value (for example, " 0 ").Each all indicates the time interval from MAP frame 310a to the beginning of corresponding time period with a plurality of scheduled time units (for example, 4 μ s) time migration field 342 and 346a. Duration field 343 and 348a each all with a plurality of scheduled time units (for example, 16 μ s) indication since the time period to the time interval that finishes the length of section (that is, instruction time).
Minimum R according to the resource of estimating for each STA
InitConfirm the first up link MAP 322a of MAP frame 310a.R
InitThe minimum data rates of each service that indication STA connects, the perhaps required resource of transmitting control message.The RR message that is used to ask additional resource to distribute is the generic instance of control messages.If during service inserts foundation, confirm the minimum data rates of each service, then confirm the stock number that transmitting control message is required based on the length of control messages.Consequently, the first up link time period 314a of first up link MAP 322a indication is minimized in transmission frame period 300.
The time period by corresponding STA information 332 indications of STA in downlink transmission time section 312 of the phase resource of having been distributed by MAP frame 310a receives data, and the time period by corresponding STA information 336a indication in the first up link time period 314a is sent data.Down link data and uplink data can comprise and comprise one or more gathering Medium Access Control (MAC) Protocol Data Units (PDU) (A-MPDU) and/or the MPDU of payload and affirmation.STA keeps park mode in time period that MAP frame 310a is sent out with in the section At All Other Times except the time period of MAP frame 310a indication.
When sending data in the time period of the distribution of the first up link time period 314a, each STA confirms whether the time period of distributing is enough to send the wherein data of queuing.If the time period of distributing is not enough, then STA sends RR message subsequently in the time period of the distributing data of transmitting section queuing only.In this case, use (R in the time period of distributing
Init-R
RR) data of resource transmitting section queuing, wherein, R
RRIndication is used to send the resource of RR message.Adopt the queue size field of the data of lining up or set up RR message, and RR message can comprise an A-MPDU and the data of sending in the time period of distributing based on the duration request field of QoS.In other words, RR message incidentally (piggyback) on data.
AP can be through sending sub-MAP frame 310b based on the RR distribution of messages accurate up link time period from STA.By this way, allow to send the data of residue queuing.After the first up link time period 314a sent RR message, STA kept watch on the reception of sub-MAP frame 310b immediately.Sub-MAP frame 310b indication is in response to the uplink resource of RR message by the AP additional allocation.
Just, sub-MAP frame 310b comprises the second up link MAP 322b, the phase resource allocation that the second up link MAP 322b indicates the second up link time period 314b.Similarly, can sub-MAP frame 310b be sent with the basic rate collection.The second up link MAP 322b comprises the amount field 334b of STA and at least one the STA information field 336b that confirms based on the amount field 334b of STA.STA information field 336b comprises STA id field 344b, time migration field 346b and duration field 348b; STA id field 344b indication has distributed the STA of time period at the second up link time period 314b; The beginning of the time period of STA, the length of duration field 348b section instruction time are distributed in time migration field 346b indication.The element of STA information field 336b has been described above.Distributed the time period by corresponding STA information 336b indication of STA in the second up link time period 314b of phase resource to receive data through sub-MAP frame 310b.
Although do not illustrate, if still need additional resource to distribute, then a plurality of sub-MAP frames and can be included in addition in the transmission frame period 300 based on the up link time period or the downlink transmission time section of sub-MAP frame.The transmission plan that use can have the MAP frame of one or more subframes is called as multistage " multi-wheel energy saving " (PSMP), and MAP frame 310a and sub-MAP frame 310b are called as PSMP frame and sub-PSMP frame respectively.Each of PSMP frame and sub-PSMP frame all followed at least one downlink transmission time section or the up link time period by the indication of corresponding (son) PSMP frame, and the time period of (son) PSMP frame and corresponding indication is called as (son) PSMP sequence.In other words, come PSMP sequence of initialization through sending the PSMP frame, and STA only the time period of the indication of the PSMP frame in the PSMP sequence that begins with the PSMP frame wake up, thereby minimize power consumption.
Can insert the competition time period 316 afterwards final nucleotide sequence duration by at least one STA based on competition.
Be noted that under the situation that does not break away from the spirit and scope of the present invention the arrangement of the MAP frame 310a that shows among Fig. 3 and the element of 310b and said element can change.For example, each of MAP frame 310a and 310b all comprises: STA id field, the time migration that is used for downlink transmission and a duration field and be used for the time migration duration field of ul transmissions.In this case, if not free section is assigned to up link or down link, then corresponding duration field is set to sky (0).In addition, each of MAP frame 310a and 310b can comprise and be used to indicate whether the field of following by another sub-MAP frame.STA analyzes the field in the sub-MAP frame, to confirm whether this sub-MAP frame is the last sub-MAP frame in the current transmission frame period.
Fig. 4 is the sequential chart according to the description of the power reduction effect of phase resource allocation of the present invention.
With reference to the diagrammatic sketch (a) of Fig. 4, transmission frame period 400 comprises: MAP frame 410a, downlink transmission time section 412, the first up link time period 414a, sub-MAP frame 410b and the second up link time period 414b.The phase resource allocation of the MAP frame 410a indicating downlink link time period 412 and the first up link time period 414a.
The diagrammatic sketch of Fig. 4 (b) shows that the resource of the first up link time period 414a that distributes based on MAP frame 410a is enough to send the data conditions of lining up among the STA.Just, after the time period 420 receives MAP frame 410a, switch to park mode after, the time period 422 of the distribution of STA in the downlink transmission time section 412a of MAP frame 410a indication wakes up, and receives data from AP.After when the time period 422 expires, switching back park mode, STA keeps the time period 424 of the distribution of resting state in the first up link time period 414a of MAP frame 410a indication.In the time period 424, STA sends the data to AP.Here, STA so keep park mode, receives the MAP frame of next transmission frame period up to STA, and need not to keep watch on the reception of sub-MAP frame 410b owing to fully sent the data of lining up in the time period 424.
The diagrammatic sketch of Fig. 4 (c) shows that the inadequate resource of the first up link time period 414a that distributes based on MAP frame 410a is to send the situation of STA desired data.Just, after the time period 430 receives MAP frame 410a, switch to park mode after, the time period 432 of the distribution of STA in the downlink transmission time section 412a of MAP frame 410a indication wakes up, and receives data from AP.After when the time period 432 expires, switching back park mode, STA keeps the time period 434 of the distribution of resting state in the first up link time period 414a of MAP frame 410a indication.In the time period 434, STA sends the data to AP.In the time period 434, STA will ask the RR message of the required resource of the data of transmission residue queuing to be sent together with the data of part queuing simultaneously.
After sending RR message, STA woke up in the time period 436, and kept watch on the reception of sub-MAP frame 410b.When receiving sub-MAP frame 410, STA switches back resting state and waits for the time period 438 in the second up link time period 414b of sub-MAP frame 410b indication.In the time period 438, the data that STA will remain queuing send to AP.Although do not illustrate, can be before transmission frame period 400 expire, allocation map is to the other time period of one or more additional MAP frames.
Fig. 5 illustrates according to exemplary accurate resource allocation of the present invention.Here, in the service coverage area of AP 502, two STA (STA1 504 and STA2 506) communicate each other.
With reference to Fig. 5, AP 502 begins to send MAP frame 510a transmission frame period.Distribute to the time period 522 and 532 of STA1 504 and STA2 506 among the time period 512a that distributes to STA1 504 and STA2 506 in the MAP frame 510a indicating downlink link time period 512 and 512b and the up link time period 514a.Here, time period 512a, 512b, 522 and 532 do not overlap each other.After sending MAP frame 510a, AP 502 sends the data to STA1 504 at time period 512a, and sends the data to STA2 506 at time period 512b.MAP frame 510a, sub-MAP 510b and downlink transmission time section and up link time period that all are relevant all appear at a transmission frame period 500.
When at time period 512a when AP 502 receives data, STA1 504 sends the data to AP 502 in the time period 522 of the up link time period 514a of MAP frame 510a indication.At this moment, owing in STA1 504, there are the data 524 of remaining queuing, so STA1 504 sent data in the time period 522 together with the RR message of the required resource of the data of request dispatcher queue 524.When at time period 512b when AP 502 receives data, STA2 506 sends the data to AP 502 in the time period 532 by the up link time period 512a of MAP frame 510a indication.STA2 506 does not send RR message in the time period 532, and this is the data that are enough to dispatcher queue because of the time period 532 of distributing.
If AP 502 from STA1 504 with detecting RR message when STA2 506 receives data from STA1 504, then the AP 502 additional period section 526 that will be suitable for the data 524 of dispatcher queue is distributed to STA1 504 through sub-MAP frame 510b.If AP 502 can not distribute all required resources of RR message in current transmission frame period; Then AP 502 can only distribute resource available in the current transmission frame period through sub-MAP frame 510b, and perhaps the MAP frame through next transmission frame period distributes all requested resource.At AP 502 only under the last situation of transmitting section requested resource, can distribute the required surplus resources of STA1 504 in next transmission frame period.
If STA2 506 does not need additional resource to distribute, then only there is the time period that is used for STA1 504 526 among the up link time period 514b that follows sub-MAP frame 510b.When receiving sub-MAP frame 510b, STA1 504 sends the data 524 of residue queuing in the time periods 526 of sub-MAP frame 510b indication.
Fig. 6 is the flow chart that illustrates according to the operation of AP of the present invention.
With reference to Fig. 6, in step 602, AP sends the MAP frame of the time period that is designated as current transmission frame period distribution, with the current transmission frame of initialization.In step 604, AP sends at least one relevant STA in the time period of MAP frame indication with down link data.In step 606, AP time period of MAP frame indication from least one relevant STA receiving uplink data.
In step 608, AP confirms whether the uplink data that receives comprises the RR message that the request additional resource distributes.If from uplink data, do not detect RR message, AP Resources allocation (promptly not sending sub-MAP frame) and carry out next transmission frame period no longer in current transmission frame period then.Yet if detect RR message, in step 610, the AP time period that RR message is required is distributed to the STA that sends RR message.In step 612, after the All Time section of MAP frame indication expired, AP sent the sub-MAP frame of the time period of indication distribution.In step 614, AP the time period of distributing from STA receiving uplink data.
Fig. 7 is the flow chart that illustrates according to the operation of STA of the present invention.
With reference to Fig. 7, in step 702, when receiving the MAP frame from AP, STA discerns the beginning of current transmission frame period and downlink transmission time section and/or the up link time period that this STA is distributed in detection.In step 704, STA in the downlink transmission time section of MAP frame indication from the AP receiving downlink data.
Before the up link time period of MAP frame indication arrived, STA confirmed the data whether the up link time period of MAP frame indication is enough to dispatcher queue in step 706.If the up link time period is enough, then in step 712, STA sends to AP in up link time period of MAP frame indication with the data of its queuing.
Yet, if the up link time period is not enough, in step 708, STA up link time period of MAP frame indication will the part queuing the data RR message of sending the required resource of the data of residue queuing together with request send to AP.After sending RR message, if the All Time section of MAP frame indication expires, then in step 710, STA receives sub-MAP frame from AP, returns step 706 subsequently.
Be appreciated that from foregoing description; AP only distributes minimum resource through a MAP frame; To minimize the stock number of over-evaluating; If STA needs additional resource, AP the uplink resource in the identical traffic frame period immediately then through sub-MAP frame request for allocation, thus eliminated the reason (such as delay and jitter) that QoS reduces.In addition, STA maximizes the park mode retention time, and unnecessary long-time supervision, thereby reduces the energy consumption of STA.
Although the certain preferred embodiment demonstration of the present invention of reference has also been described the present invention; But it should be appreciated by those skilled in the art that; Under the situation of the spirit and scope of the present invention that do not break away from the claim qualification, can carry out the various changes of form and details to it.
Claims (28)
1. method of in Radio Network System, distributing the transmission period in the transmission frame period, said transmission frame period has the preset duration, said method comprising the steps of:
Transmission offers downlink transmission time section and initial uplink time period the multi-wheel energy saving frame of website;
The downlink transmission time section that provides at the multi-wheel energy saving frame sends the data to website, and receives data in the initial uplink time period that the multi-wheel energy saving frame provides from website;
When detecting when distribute sending the resource request message of at least one website of the required additional resource of the uplink data of residue queuing from request; And after the time period, in transmission frame period, sending to provide is enough to send the follow-up multi-wheel energy saving frame of the affix line link time period of the uplink data of the residue queuing of part at least in downlink transmission time section that the multi-wheel energy saving frame provides and initial uplink;
In the affix line link time period that follow-up multi-wheel energy saving frame provides, receive the uplink data of the residue queuing of said part at least from said at least one website that sends resource request message.
2. the method for claim 1; Wherein, If the said affix line link time period is not enough to send the data of residue queuing; Then send the additional resource request message, and in additional follow-up multi-wheel energy saving frame, be provided the affix line link time period, be sent out or the preset duration of transmission frame period expires up to the data of all residue queuings.
3. the method for claim 1, wherein be provided the initial uplink time period according at least one in the time period required of required minimum data rates with sending resource request message.
4. the method for claim 1, wherein resource request message comprises at least one in size field and the duration request field, the uplink data amount of size field definition residue queuing, the required service quality of duration request field definition.
5. the method for claim 1, wherein follow-up multi-wheel energy saving frame comprises:
Send the identifier of the website of resource request message;
Begin skew, indicate the starting point of the affix line link time period that follow-up multi-wheel energy saving frame provides;
The duration field, the length of indication affix line link time period.
6. the method for claim 1, wherein all time periods of providing of all time periods that provide of multi-wheel energy saving frame and follow-up multi-wheel energy saving frame are included in the transmission frame period with regular length.
7. method that in Radio Network System, receives the transmission period of the distribution in the transmission frame period, said transmission frame period has the preset duration, said method comprising the steps of:
Reception is provided the multi-wheel energy saving frame of downlink transmission time section and initial uplink time period by access point;
If the initial uplink time period that the multi-wheel energy saving frame provides is not enough to the data of dispatcher queue, then data and the request in the transmitting section queuing of initial uplink time period divides the resource request message that is used in the additional resource that remains the data of lining up;
In transmission frame period, receive the follow-up multi-wheel energy saving frame that the affix line link time period is provided by access point, wherein, after all time periods that the multi-wheel energy saving frame provides, access point sends follow-up multi-wheel energy saving frame;
In the affix line link time period of follow-up multi-wheel energy saving frame indication, the data that residue is lined up send to access point.
8. method as claimed in claim 7; Wherein, If the affix line link time period is not enough to send the data of residue queuing; Then send the additional resource request message and the affix line link time period is provided, be sent out or the preset duration of transmission frame period expires up to the data of all residue queuing.
9. method as claimed in claim 7 wherein, provides the initial uplink time period according at least one in the time period required with sending resource request message of required minimum data rates.
10. method as claimed in claim 7, wherein, resource request message comprises at least one in size field and the duration request field, the uplink data amount of size field definition residue queuing, the required service quality of duration request field definition.
11. method as claimed in claim 7, wherein, follow-up multi-wheel energy saving frame comprises:
Send the identifier of the website of resource request message;
Begin skew, indicate the starting point of the affix line link time period that follow-up multi-wheel energy saving frame provides;
The duration field, the duration of indication affix line link time period.
12. method as claimed in claim 7, wherein, all time periods that the multi-wheel energy saving frame provides were included in the transmission frame period with regular length with all time periods that all follow-up multi-wheel energy saving frames provide.
13. an access point apparatus that in Radio Network System, distributes the transmission period in the transmission frame period, said transmission frame period has the preset duration, and said equipment comprises:
Processor; Generation offers downlink transmission time section and initial uplink time period the multi-wheel energy saving frame of website; When detecting when distribute sending the resource request message of at least one website of the required additional resource of the uplink data of residue queuing from request; And in downlink transmission time section that the multi-wheel energy saving frame provides and initial uplink after the time period, be created in the transmission frame period and the affix line link time period to be offered request distribute and be enough to send the follow-up multi-wheel energy saving frame of said at least one website of the uplink data of the residue queuing of part at least;
Transceiver; In the downlink transmission time section that the multi-wheel energy saving frame provides, send the data to website; And receive data from website in the initial uplink time period that the multi-wheel energy saving frame provides; In the affix line link time period that follow-up multi-wheel energy saving frame provides, receive the uplink data of the residue queuing of said part at least from said at least one website that sends resource request message.
14. access point apparatus as claimed in claim 13; Wherein, If the affix line link time period is not enough to send the data of residue queuing; Then send the additional resource request message and the affix line link time period is provided, be sent out or the preset duration of transmission frame period expires up to the data of all residue queuing.
15. access point apparatus as claimed in claim 13 wherein, provides the initial uplink time period according at least one in the time period required with sending resource request message of required minimum data rates.
16. access point apparatus as claimed in claim 13; Wherein, Resource request message comprises at least one in size field and the duration request field, the uplink data amount of size field definition residue queuing, the required service quality of duration request field definition.
17. access point apparatus as claimed in claim 13, wherein, follow-up multi-wheel energy saving frame comprises:
Send the identifier of the website of resource request message;
Begin skew, indicate the starting point of the affix line link time period that follow-up multi-wheel energy saving frame provides;
The duration field, the length of indication affix line link time period.
18. access point apparatus as claimed in claim 13, wherein, all time periods that all time periods that the multi-wheel energy saving frame provides and follow-up multi-wheel energy saving frame provide are included in the transmission frame period with regular length.
19. a site apparatus that in Radio Network System, receives the transmission period of the distribution in the transmission frame period, said transmission frame period has the preset duration, and said equipment comprises:
Processor; Analysis is provided the multi-wheel energy saving frame of downlink transmission time section and initial uplink time period by access point; And if initial uplink time period of providing of multi-wheel energy saving frame be not enough to the data of dispatcher queue, then produce the data cell of the resource request message of the additional resource that the data that comprise the part queuing and request divide the data that are used in the residue queuing;
Transceiver; Receive the multi-wheel energy saving frame from access point; The multi-wheel energy saving frame is passed to processor; In the initial uplink time period data cell is sent to access point; And in transmission frame period, receive the follow-up multi-wheel energy saving frame that the affix line link time period is provided by access point, and affix line link time period that this follow-up multi-wheel energy saving frame provides at least the data of the residue queuing of part send to access point, access point sends this follow-up multi-wheel energy saving frame after all time periods that the multi-wheel energy saving frame provides.
20. site apparatus as claimed in claim 19 wherein, provides the initial uplink time period according at least one in the time period required with sending resource request message of required minimum data rates.
21. site apparatus as claimed in claim 19; Wherein, Resource request message comprises at least one in size field and the duration request field, the uplink data amount of size field definition residue queuing, the required service quality of duration request field definition.
22. site apparatus as claimed in claim 19, wherein, follow-up multi-wheel energy saving frame comprises:
Send the identifier of the website of resource request message;
Begin skew, indicate the starting point of the affix line link time period that follow-up multi-wheel energy saving frame provides;
The duration field, the length of indication affix line link time period.
23. site apparatus as claimed in claim 19, wherein, all time periods that all time periods that the multi-wheel energy saving frame provides and follow-up multi-wheel energy saving frame provide are included in the transmission frame period with regular length.
24. the Radio Network System with transmission frame period, said transmission frame period has the preset duration, and this Radio Network System comprises:
Access point; In the transmission frame period transmission downlink transmission time section and initial uplink time period are offered the multi-wheel energy saving frame of at least one website, and send the follow-up multi-wheel energy saving frame of the affix line link time period of the uplink data that the residue queuing that is enough to send at least partly is provided;
Website; If the initial uplink time period that the multi-wheel energy saving frame provides is not enough to the data of dispatcher queue; Then at the data of initial uplink time period transmitting section queuing and the resource request message of the additional resource of asking to divide the data that are used in the residue queuing; In transmission frame period, receive the follow-up multi-wheel energy saving frame that the affix line link time period is provided by access point; And affix line link time period of follow-up multi-wheel energy saving frame indication at least the data of the residue queuing of part send to access point, access point sends follow-up multi-wheel energy saving frame after all time periods that the multi-wheel energy saving frame provides.
25. Radio Network System as claimed in claim 24 wherein, provides the initial uplink time period according at least one in the time period required with sending resource request message of required minimum data rates.
26. Radio Network System as claimed in claim 24; Wherein, Resource request message comprises at least one in size field and the duration request field, the uplink data amount of size field definition residue queuing, the required service quality of duration request field definition.
27. Radio Network System as claimed in claim 24, wherein, follow-up multi-wheel energy saving frame comprises:
Send the identifier of the website of resource request message;
Begin skew, indicate the starting point of the affix line link time period that follow-up multi-wheel energy saving frame provides;
The duration field, the length of indication affix line link time period.
28. Radio Network System as claimed in claim 24, wherein, all time periods that all time periods that the multi-wheel energy saving frame provides and follow-up multi-wheel energy saving frame provide are included in the transmission frame period with regular length.
Applications Claiming Priority (7)
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| US72791505P | 2005-10-18 | 2005-10-18 | |
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| US60/730,924 | 2005-10-27 | ||
| KR10-2006-0051940 | 2006-06-09 | ||
| KR1020060051940A KR100615140B1 (en) | 2005-10-18 | 2006-06-09 | Method and apparatus for allocating transmission period in wireless telecommunication system and therefor system |
| PCT/KR2006/004208 WO2007046618A1 (en) | 2005-10-18 | 2006-10-17 | Method and apparatus for allocating transmission period in a wireless communication system, and system therefor |
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| CN101288249A CN101288249A (en) | 2008-10-15 |
| CN101288249B true CN101288249B (en) | 2012-06-20 |
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| CN200680038332.2A Expired - Fee Related CN101288249B (en) | 2005-10-18 | 2006-10-17 | Method and apparatus for allocating transmission period in a wireless communication system |
| CN200680038377.XA Expired - Fee Related CN101288250B (en) | 2005-10-18 | 2006-10-17 | Method, apparatus and system for receiving an allocated transmission period in a wireless communication system |
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| US8244265B2 (en) * | 2007-11-28 | 2012-08-14 | Motorola Mobility Llc | Techniques for aligning application output and uplink resource allocation in wireless communication systems |
| US9450711B2 (en) * | 2008-04-02 | 2016-09-20 | Qualcomm Incorporated | Method and apparatus for extended reverse direction grant in a wireless local area network (WLAN) |
| US10771199B2 (en) | 2008-04-02 | 2020-09-08 | Qualcomm Incorporated | Methods and apparatus for reverse link acknowledgement in a wireless local area network (WLAN) |
| US9203560B2 (en) | 2008-04-04 | 2015-12-01 | Qualcomm Incorporated | Methods and apparatus for delayed block acknowledgement in a wireless local area network (WLAN) |
| EP2579477B1 (en) | 2010-05-26 | 2017-04-19 | LG Electronics Inc. | Method and apparatus for transceiving data in a wireless lan system |
| CN104205951B (en) * | 2012-04-04 | 2018-11-23 | 诺基亚技术有限公司 | It is used for transmission synchronous method and apparatus |
| EP2846597B1 (en) * | 2012-04-30 | 2017-09-27 | LG Electronics Inc. | Method and device for accessing channel in wireless lan system |
| CN104039013B (en) * | 2013-03-06 | 2019-05-17 | 中兴通讯股份有限公司 | Resource allocation information processing method and processing device |
| CN104185296B (en) * | 2013-05-20 | 2018-02-06 | 华为技术有限公司 | Channel access method and access point |
| CN105850220B (en) * | 2013-12-24 | 2019-07-23 | 华为技术有限公司 | Data transmission method and equipment |
| WO2015127616A1 (en) | 2014-02-27 | 2015-09-03 | 华为技术有限公司 | Wireless local area network data transmission method and device |
| MY192889A (en) * | 2015-02-02 | 2022-09-14 | Huawei Tech Co Ltd | Resource indication method and apparatus |
| CN104853385A (en) * | 2015-05-25 | 2015-08-19 | 电子科技大学 | Dynamic mechanism for efficient information transmission in WIFI system based on OFDMA technology |
| CN105828452B (en) * | 2016-05-10 | 2019-10-08 | 珠海市魅族科技有限公司 | Communication means, communication device, access point and the website of WLAN |
| EP3536103A1 (en) * | 2016-11-03 | 2019-09-11 | Interdigital Patent Holdings, Inc. | Dynamic allocation in dense mmwave networks |
| WO2018127221A1 (en) * | 2017-01-06 | 2018-07-12 | 电信科学技术研究院 | Resource indication method and related device |
| CN111405672B (en) * | 2019-01-02 | 2023-03-28 | 中国移动通信有限公司研究院 | Service transmission method, device, equipment and storage medium |
| CN113815909B (en) * | 2021-09-09 | 2023-10-27 | 中国人民解放军63920部队 | Uplink determining method and device for peer-to-peer mode combination configuration spacecraft |
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| CN101288250B (en) | 2012-02-08 |
| CN101288249A (en) | 2008-10-15 |
| CN101288250A (en) | 2008-10-15 |
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