CN101331789B - Weighted fair sharing of a wireless channel using resource utilization masks - Google Patents

Abstract

Systems and methods are described that facilitate data communication in a wireless communication environment. According to various aspects, a node, such as an access point or an access terminal, may determine a number of channels over which it will transmit a communication signal. The node may then select channels based on whether the channels are available or unavailable, wherein available channels are preferentially selected over unavailable channels. The node may then transmit a signal over the at least one of the selected channels.

Description

Use the Weighted fair of the wireless channel of resource utilization masks to share

The application's case is advocated the 60/730th of being entitled as of application on October 26th, 2005 " using the Weighted fair of the wireless channel of resource utilization masks to share (WEIGHTED FAIR SHARING OF A WIRELESS CHANNEL USING RESOURCE UTILIZATION MASKS) ", the 60/730th of being entitled as of No. 631 U.S. Provisional Application cases and on October 26th, 2005 application " interference management (INTERFERENCE MANAGEMENT USING RESOURCE UTILIZATION MASKS SENT AT CONSTANT POWER SPECTRAL DENSITY (PSD)) that uses the resource utilization masks that sends with constant power spectral density (PSD) ", the rights and interests of No. 727 U.S. Provisional Application cases, described two U.S. Provisional Application cases are incorporated herein by reference.

Technical field

Below describe content and relate generally to radio communication, and more particularly, relate under wireless communications environment reduce disturbance and improve throughput and channel quality.

Background technology

Wireless communication system has become the universal means of whole world most people so as to communicating.It is less and more powerful that radio communication device has become, in order to satisfy consumer's needs and improve portability and convenience.For example the increase of disposal ability has caused the requirement of wireless network transmission system is increased in the mobile device of cellular phone.The usually easy renewal unlike the cellular device of communicating by letter by it of this type systematic.Along with the mobile device capacity expansion, may be difficult to help to take full advantage of new and keep older Radio Network System through the mode of improved wireless device capabilities.

Typical wireless communication network (for example, use frequency division, time-division and code minute technology) comprise one or more base stations that the overlay area is provided, and can in described overlay area, transmit and one or more of receive data move (for example, wireless) terminal.A plurality of data flow can be transmitted simultaneously to be used for broadcasting, multicast and/or unicast services in typical base station, and wherein data flow is the stream of the interested data that can independently receive of portable terminal.Portable terminal in the overlay area of described base station may to of receiving that mixed flow delivers, more than one or all data flow interested.Equally, portable terminal can transfer data to base station or another portable terminal.Because the cause of channel variation and/or interference power variations, this type of between base station and the portable terminal or between the portable terminal communicated by letter and may be demoted.Therefore, need to help under wireless communications environment reduce disturbance and improve system and/or the method for throughput in the technique.

Summary of the invention

Hereinafter present the simplification general introduction of one or more aspects, in order to the basic comprehension to described aspect is provided.This general introduction is not the extensive overview to all contemplated aspects, and does not wish to determine key or the important element of all aspects, the scope of yet not wishing to delimit any or all aspect.The sole purpose of this general introduction is some concepts that present in simplified form one or more aspects, as the preamble to the more detailed description content that presents after a while.

According to various aspects, subject innovation is related to that wide area drawn game field wireless communication networking provides unified technology so that the benefit that helps to realize to be associated with honeycomb fashion and Wi-Fi technology, alleviates simultaneously system and/or the method for shortcoming associated with it.For instance, cellular network can be disposed according to plan and arrange that when designing or setting up network, this can increase efficient, and the Wi-Fi network is disposed with more convenient ad hoc fashion usually.The Wi-Fi network can help to be provided for access point and symmetrical media access control (MAC) channel that accesses terminal in addition, and the backhaul support with wireless capability in the band, and this is that cellular system does not provide.

Unified technology described herein helps symmetrical MAC to be provided and to have the backhaul support of being with interior wireless capability.In addition, subject innovation helps with the flexi mode on-premise network.Method described in the present invention allows performance to adapt to according to deployment, and therefore good efficiencies is provided when disposing through plan or partly planning, and provides enough stability during without plan at network.That is, various aspects described herein allow application plan deployment (for example, as under the honeycomb fashion deployment scenario), specific deployments (for example, can be used for the Wi-Fi network design) or both combinations to come on-premise network.In addition, other side relates to the node of supporting the vicissitudinous transmission power level of tool, and realizes the minizone fairness about the resource distribution, Wi-Fi or cellular system and the described aspect of insufficient support.

For instance, according to some aspects, can promote by the transmission of using resource utilization messages (RUM) combined dispatching transmitter and receiver the Weighted fair of wireless channel is shared, whereby, transmitter is based on asking one group of resource to the knowing of availability in its neighbor, and receiver is based on the subset of the knowing of availability in its neighbor being permitted institute's request channels.Transmitter is understood availability based on monitoring receiver in its vicinity, and receiver is understood potential interference by the transmitter of monitoring in its vicinity.According to the parties concerned, RUM can be disadvantageous (as the receiver of transfer of data, because the cause of its interference of experiencing when receiving) and need conflict avoid transmission mode with instructs node not only through weighting, and the disadvantageous degree of instructs node.The RUM receiving node can utilize its received RUM with and the fact of flexible strategy determine suitable response.For instance, this flexible strategy announcement allows to avoid conflict in the mode of justice.The present invention describes this method.

According to other side, can use RUM refusal threshold value (RRT) to help to determine whether to respond the RUM that receives.For instance, can calculate with the included various parameters of the RUM that receives and/or information and measure, and described measuring with RRT can be compared, whether guarantee response with the RUM that determines sending node.According to the parties concerned, the RUM sending node can by indication to the number of channel of applications RUM indicate its unfavorable degree so that the number of channel (common, these channels can be resource, frequency subcarriers and/or time slot) is indicated unfavorable degree.If unfavorable degree reduces in response to RUM, so to the number of channel of transmission RUM can and reduce for subsequently RUM transmission.If unfavorable degree does not reduce, so to the number of channel of application RUM can and increase for subsequently RUM transmission.

Power spectral density that can be constant (PSD) sends RUM, and receiving node can be estimated radio frequency (RF) channel gain between himself and the RUM sending node with the power that receives of the power spectral density that receives and/or described RUM, to determine whether described radio-frequency channel gain will cause at the sending node place interference (for example, but be higher than be scheduled to the acceptance threshold grade) when it transmit.Therefore, may exist wherein the RUM receiving node can the RUM from the RUM sending node be decoded, but determine that it can not cause the situation of interference.When RUM receive to determine that it should obey described RUM, but it can be done like this by selecting fully keep out of the way or make the potential interference grade of its estimation be lower than predetermined acceptance threshold grade by the through-put power that choice for use fully reduces from resource.Therefore, with unify mode support " firmly " disturb avoid (keeping out of the way fully) and " soft " interference avoid (power control) both.According to the parties concerned, receiving node can be determined channel gain between receiving node and the RUM sending node with RUM, determines whether transmission in order to help based on the estimated caused interference in sending node place that goes out.

According to one side, a kind of radio data communication method can comprise: determine the number from the required channel of the transmission of node; Selective channel, wherein to the selection of available channel prior to unavailable channel; And transmission is to the request of one group of at least one selected channel.In certain embodiments, selective channel comprises channel is divided into a group or more channel, and the disabled resource utilization messages of subset (RUM) that receives described group of channel of indication, and further will organize each channel decomposing in the channel and become one or more time slots and/or resolve into one or more subcarriers.In certain embodiments, the method further comprises and determines whether given channel is not available when receiving RUM for given channel.

According on the other hand, a kind of device of RFDC that promotes can comprise: determination module, and it determines the number from the required channel of the transmission of node; Select module, its selective channel, wherein to the selection of available channel prior to unavailable channel; And transport module, it sends the request to one group of at least one selected channel.In certain embodiments, described selection module is divided into a group or more channel with channel, and receive the disabled resource utilization messages of subset (RUM) of described group of channel of indication, and described selection module will be organized each channel decomposing in the channel and become one or more time slots and/or resolve into one or more subcarriers.In certain embodiments, described selection module determines whether described given channel is not available when receiving RUM for given channel.

Relate on the other hand a kind of device that promotes RFDC, it comprises: for the device of determining from the number of the required channel of the transmission of node; The device that is used for selective channel, wherein to the selection of available channel prior to unavailable channel; And be used for transmission to the device of the request of one group of at least one selected channel.In certain embodiments, described device for selective channel is divided into a group or more channel with channel, and receive the disabled resource utilization messages of subset (RUM) of described group of channel of indication, described device for selective channel becomes each channel decomposing of described group of channel one or more time slots and/or resolves into one or more subcarriers.In certain embodiments, the device that is used for selective channel determines whether given channel is not available when receiving RUM for given channel.

Another aspect relates to a kind of machine-readable medium, and it comprises the instruction for transfer of data, and wherein said instruction causes machine immediately after execution: determine the number from the required channel of the transmission of node; Selective channel, wherein to the selection of available channel prior to unavailable channel; And transmission is to the request of one group of at least one selected channel.

Another aspect relates to a kind of processor that promotes transfer of data, and described processor is configured to: determine the number from the required channel of the transmission of node; Selective channel, wherein to the selection of available channel prior to unavailable channel; And transmission is to the request of one group of at least one selected channel.

In order to realize aforementioned and relevant target, one or more aspects comprise hereinafter fully to be described and the specific feature of pointing out in claims.Following description content and accompanying drawing be some illustrative aspect of described one or more aspects of statement in detail.Yet several in the variety of way of the principle that can use various aspects are only indicated in these aspects, and wish that described aspect comprises all this type of aspect and equipollents thereof.

Description of drawings

The wireless communication system with a plurality of base stations and a plurality of terminals of Fig. 1 illustrative examples as utilizing in conjunction with one or more aspects.

Fig. 2 is the explanation of the method shared according to the Weighted fair that be used for to use resource utilization masks/message (RUM) to carry out wireless channel of one or more aspects described herein.

Fig. 3 explanation is according to the sequence of the event that asks for permission of helped to the resource distribution of one or more aspects described herein.

Fig. 4 is the explanation of some topologys that helps to understand the scheme of asking for permission according to various aspects.

Fig. 5 illustrates the method that the resource utilization messages (RUM) for transmitting with constant power spectral density (PSD) by use of one or more aspects that present according to this paper is managed interference.

Fig. 6 be according to one or more aspects for generation of TxRUM and the request to help the explanation in the method that flexibly media access control (MAC) is provided in the wireless network of specific deployments.

Fig. 7 be according to one or more aspects for generation of the explanation of method to the license of the request of transmission.

Fig. 8 is the number by the subcarrier of regulating to transmit RUM according to the unfavorable grade that is associated with given node of being used for according to one or more aspects, realizes competing the explanation of the method for the fairness between the node.

Fig. 9 is the explanation according to the RxRUM transmission of carrying out with constant power spectral density (PSD) between two nodes of one or more aspects.

Figure 10 uses constant PSD with the explanation of the method for the amount of the interference that helps to estimate to be caused at the Section Point place by first node according to for the RUM transmission of being used for of one or more aspects.

Figure 11 explanation is used in the method that responds interference control bag under plan and/or specific wireless communication environment according to various aspects.

Figure 12 is the explanation for generation of the method for RxRUM according to various aspects as described above.

Figure 13 is the explanation according to the method that is used for one or more RxRUM that receive of response of one or more aspects.

Figure 14 is the explanation of the wireless network environment that can use in conjunction with various system and methods described herein.

Figure 15 is the explanation according to the equipment of the promotion RFDC of various aspects.

Figure 16 is the explanation that promotes the equipment of radio communication according to the use resource utilization messages (RUM) of one or more aspects.

Figure 17 is the explanation that produces resource utilization messages (RUM) and RUM is weighted to indicate the equipment of unfavorable grade of helping according to various aspects.

Figure 18 is to determine the explanation of the worst equipment of which node according to the relative conditon that helps the Nodes under the comparison wireless communications environment of one or more aspects.

Embodiment

Now referring to graphic and describe various aspects, wherein refer to similar elements with same reference numerals all the time.In the description content hereinafter, for the purpose of explaination, a large amount of specific detail have been stated, in order to the complete understanding to one or more aspects is provided.Yet, obviously, can not have to put into practice in the situation of these specific detail described aspect.In other cases, show well-known construction and device with the block diagram form, in order to help to describe one or more aspects.

As used in the present application, term " assembly ", " " system " and analog thereof are intended to refer to the entity relevant with computer, hardware, software, executory software, firmware, middleware, microcode and/or its arbitrary combination.For instance, assembly can be process, processor, object, executable file, execution thread, program and/or the computer that (but be not limited to be) moved at processor.One or more assemblies can reside in process and/or the execution thread, and assembly can be positioned on the computer, and/or be distributed between two or more computers.And these assemblies can store from above the various computer-readable medias of various data structures and carry out.Described assembly can (for example) according to the signal with one or more packets (described data for example be from one by another assembly in described signal and the local system, in the distributed system and/or cross for example internet with other system network and with the data of the interactional assembly of another assembly), communicate by this locality and/or remote process.In addition, as be understood by those skilled in the art that, the assembly of system described herein can rearrange and/or replenish the various aspects describe in order to help to realize about it, target, advantage etc. by additional assemblies, and the accurate configuration that is not limited to state in the Given Graph.

In addition, in conjunction with subscriber stations various aspects are described herein.Subscriber stations also can be called as system, subscriber unit, travelling carriage, movement, remote station, remote terminal, accesses terminal, user terminal, user agent, user's set or subscriber's installation.Subscriber stations can be cellular phone, cordless telephone, Session initiation Protocol (SIP) phone, wireless local loop (WLL) platform, personal digital assistant (PDA), have the handheld apparatus of wireless connections ability, or is connected to other processing unit of radio modem.

In addition, but Application standard programming and/or engineering design technology are embodied as various aspects described herein or feature the article of method, equipment or manufacturing.Term as used herein " article of manufacturing " is intended to contain can be from the computer program of any computer readable device, carrier or medium access.For instance, computer-readable media can be including (but not limited to) magnetic storage device (for example, hard disk, floppy disk, magnetic stripe ...), CD (for example, compact discs (CD), digital multi-purpose CD (DVD) ...), smart card and flash memory device (for example, card, rod, key drive ...).In addition, various medium described herein can represent one or more devices and/or other machine-readable medium for storage information.Various other media of instruction and/or data can be stored, contain and/or be delivered to term " machine-readable medium " can and including (but not limited to) wireless channel.To understand, the employed word of this paper " exemplary " expression " is served as example, example or explanation ".There is no need this paper is described as any aspect of " exemplary " or design is interpreted as than other side or design more preferably or favourable.

Should be appreciated that " node " (as used herein) can be to access terminal or access point, and each node not only can be receiving node but also can be transmission node.For instance, each node can comprise at least one reception antenna and the receiver chain that is associated, and at least one transmit antenna and the chain that is associated.In addition, each node can comprise: one or more processors, its in order to software code to carry out any and all methods and/or agreement described herein; And memory, the computer executable instructions that it is used for the storage data and/or is associated with the whole bag of tricks described herein and/or agreement.

Now referring to Fig. 1, the various aspects that present according to this paper illustrate wireless network communications system 100.System 100 can comprise a plurality of nodes, for example one or more base stations 102 in one or more sectors (for example, honeycomb fashion, Wi-Fi or specific ...), described node with wireless communication signals receive, transmission, repeat (etc.) to each other and/or to one or more other nodes, for example access terminal 104.As be understood by those skilled in the art that, each base station 102 can comprise transmitter chain and receiver chain, its a plurality of assemblies (for example, processor, modulator, multiplexer, demodulator, demultiplexer, antenna etc.) that each can comprise again with signal transmits and reception is associated.Access terminal 104 can be that (for example) cellular phone, smart phone, laptop computer, handheld communications device, hand-held computing device, satelline radio, global positioning system, PDA and/or any other are used for the suitable device that communicates by wireless network.

Provide hereinafter discussion content to help the understanding to various systems described herein and/or method.According to various aspects, can (for example, to transmission and/or receiving node) assignment node flexible strategy, wherein each node flexible strategy is functions of the flow number supported of node.As used herein, " stream " expression enters node or from node transmission out.The summation of flexible strategy that can be by calculating all streams that pass node is determined total flexible strategy of node.For instance, constant bit-rate (CBR) stream can have predetermined flexible strategy, and data flow can have and proportional flexible strategy of its type (for example, HTTP, FTP...) etc.In addition, can be to each node assignment predetermined static flexible strategy, its can with the stream flexible strategy addition of each node, in order to provide extra priority to each node.The node flexible strategy can also be dynamic and the stream of reflection node delivery work as precondition.For instance, flexible strategy can just deliver corresponding to described Nodes the poorest throughput of the stream of (receiving).In fact, flexible strategy represent the unfavorable degree that node is just standing, and are used for carrying out between one group of interfering nodes of competition common source the fair channel access.

Request message, grant message and transfer of data are controlled by power can: however node still may experience and cause its signal and the unacceptable excessive interference of interference noise (SINR) grade.In order to alleviate bad low SINR, available resources utilizes message (RUM), and it can be (RxRUM) of receiver-side and/or (TxRUM) of transmitter side.When the level of interference on the required channel of receiver surpasses predetermined threshold level, can broadcast RxRUM by receiver.RxRUM can contain the tabulation of grant channel (receiver wishes to reduce to disturb) and node flexible strategy information thereon.In addition, power spectral density (PSD) that can be constant or with constant power delivery RxRUM.The node that RxRUM is decoded (for example, with the transmitter of the receiver competition of transmission RxRUM ...) can be reacted to RxRUM.For instance, the node of receiving RxRUM can calculate it accordingly from the channel gain of receiver (for example, the PSD that receives by measurement and know the constant PSD that sends RxRUM), and can reduce its corresponding transmission power level to alleviate interference.RxRUM recipient even can select fully the indicated channel from the RxRUM to keep out of the way.Avoid occuring in fair mode in order to ensure interference, that is, all obtain fair transmission in order to ensure all nodes and share chance, flexible strategy can be included among the RxRUM.Can utilize the flexible strategy of given node to calculate Fairshare be used to the resource that is assigned to described node.According to example, can be identified for based on the behavior of system the threshold value that sends RUM and/or RUM is reacted.For instance, avoid in the system of type in pure conflict, can send RUM for each transmission, and receive that any node of described RUM can be by not reacting in the channel that is associated.

If comprise channels bits mask (its indication RUM for which channel uses) among the RUM, the conflict that can realize extra dimension is so avoided, and it may be useful when receiver need to be dispatched a small amount of data and not wish that transmitter is kept out of the way from whole channel fully by the part of channel.This respect can provide meticulousr granularity in collision avoidance mechanism, it may be important for bursts of traffic.

When transmitter can not be asked enough resources (for example, wherein transmitter is received one or more RxRUM that force it to keep out of the way at most of channels), can broadcast TxRUM by transmitter.Can before actual transmissions, broadcast TxRUM, to notify contiguous receiver interference on the horizon.TxRUM can notify all receivers in the monitoring scope interference on the horizon based on the paid-in RxRUM of transmitter, and transmitter believes that it has the most effective requirement to bandwidth.TxRUM can deliver the information about the flexible strategy of transmitter node, and adjacent node can calculate its accordingly sharing resource with described information.In addition, can PSD or send out TxRUM with the proportional through-put power of the power level of the transmission of data.To understand, need to not transmit TxRUM with constant (for example, height) PSD, because only need to make potential affected node know the condition of transmitter.

RxRUM delivery flexible strategy information, described flexible strategy information is intended to pass on the receiver that causes owing to the interference from other transmission the degree that needs bandwidth to the utmost to all interior transmitters of " monitoring " scope (for example, no matter whether they send data to receiver).Flexible strategy can represent unfavorable degree, and can be larger when receiver is more unfavorable, and hour less in the unfavorable degree of receiver.For instance, if measure unfavorable degree with throughput, a possible relation can be expressed as so:

R wherein _TargerRepresent required throughput, R _ActualThe actual throughput that realizes, and the quantized value of Q (x) expression x.When there is single stream in the receiver place, R so _TargetThe minimum required throughput that can represent described stream, and R _ActualCan represent the average throughput that realized for described stream.The high value flexible strategy that it should be noted that the larger unfavorable degree of expression are general issues.In a similar fashion, as long as suitably revise the flexible strategy resolution logic, just can utilize high value flexible strategy wherein to represent to hang down the routine of unfavorable degree.For instance, can use the ratio (inverse of the example of above showing) of actual throughput and target throughput to calculate flexible strategy.

(it has potential different R when there are a plurality of streams in the receiver place _TargetValue) time, receiver can select to arrange flexible strategy based on worst stream so.For instance:

Wherein j is the stream index at receiver place.Also can carry out other and select, for example make flexible strategy based on the excessive summation of circulation.It should be noted that the functional form that is used for flexible strategy in description content above is in order to illustrate purely.Can multitude of different ways and measure to calculate flexible strategy with what be different from throughput.According to the parties concerned, receiver can determine whether it has the untreatment data from sender's (for example, transmitter).If if receiver has received request or it has received the previous request that it is not yet permitted, this is correct so.In the case, work as R _ActualBe lower than R _TargetThe time, receiver can send out RxRUM.

TxRUM can deliver and pass on its single information bit that whether exists.Transmitter can arrange the TxRUM position by carrying out predefined a series of actions.For instance, transmitter can be collected its nearest paid-in RxRUM, comprises the RxRUM (if described receiver has sent a RxRUM) from its oneself receiver.If transmitter not yet receives any RxRUM, it can send request to its receiver in the situation that does not send TxRUM so.If unique RxRUM is from its oneself receiver, transmitter can send request and TxRUM so.

Perhaps, if transmitter has received RxRUM (comprising a RxRUM from its oneself receiver), transmitter can sort to RxRUM based on the RxRUM flexible strategy so.If the receiver of transmitter oneself has the highest weight number, transmitter can send TxRUM and request so.Yet if the receiver of transmitter oneself is not the highest weight number, transmitter does not need to send request or TxRUM so.If the receiver of transmitter oneself is the one among some RxRUM (all having the highest weight number), transmitter sends TxRUM and request with the probability that is defined by 1/ (all RxRUM with highest weight number) so.According on the other hand, if receiver has received the RxRUM that does not comprise from a RxRUM of its oneself receiver, transmitter can not send request so.Even it should be noted that in without the situation of TxRUM and also can use the whole sequence that RxRUM as described above processes.In the case, transmitter node applied logic to be determining whether sending request to its receiver, and if send, determine so what channel is sent.

Based on request and/or the TxRUM that receiver is received, receiver can determine to permit given request.When transmitter was not yet made request, receiver did not need to send license.If receiver has been received TxRUM, but neither one is the transmitter from its service, and receiver does not send license so.If receiver is only received the TxRUM from the transmitter of its service, receiver can determine to make license so.If receiver has received that two results are possible so from its oneself transmitter and from the TxRUM of its transmitter of not serving.For instance, if the rolling average of transmission rate is R at least _Target, receiver disapproves (it is quiet that for example, it forces its transmitter) so.Otherwise receiver is to be defined as the probability license of 1.0/ (the summation TxRUM that is received).If permitted transmitter, the transmitter transmission can be by the Frame of receiver reception so.After successfully transmitting, transmitter upgrades the Mean Speed that is connected immediately with receiver.

According to other side, scheduling actions can be through programming to implement equating that the grade of service (equal grade of service, EGOS) or other scheme are with fairness and service quality between the stream of managing a plurality of transmitters and/or arrival receiver.Scheduler uses it that knowing of speed that its partner's node receives decided which node of scheduling.Yet scheduler can be observed the interference rule that media access channels (scheduler operates) are forced thereon.Specifically, scheduler can be obeyed its RUM that receives from its neighbor.For instance, on the forward link, the scheduler that access point (AP) is located (AT) (access point has business to it) that can access terminal to all sends request, unless it is blocked by RxRUM.AP can receive the one or more licenses of returning from these AT.AT can not send license, is replaced if it competes TxRUM.Then, AP can dispatch the AT with highest priority according to dispatching algorithm, and can transmit.

On reverse link, each AT with the business that will send can ask AP.AT will not send request, if it is blocked by RxRUM.AP dispatches the AT with highest priority according to dispatching algorithm, observes simultaneously its paid-in any TxRUM in last time slot.Then, AP sends license to AT.After receiving license, AT transmits immediately.

Fig. 2 is the explanation of the method 200 shared according to the Weighted fair that be used for to use resource utilization masks/message (RUM) to carry out wireless channel of one or more aspects described herein.At 202 places, can make about node (for example, access point, access terminal etc.) and will more be ready the determining of number of the channel that transmits thereon.This determines the needs that can be associated with the data of specified rate waiting for transmission based on (for example), interference or any other suitable parameter (for example, stand-by period, data rate, spectrum efficiency etc.) that the node place experiences.At 204 places, can select one or more channels to realize the channel of required number.Can carry out channel and select, preferential to available channel.For instance, formerly in the transmission cycle before the occupied channel, select known interim available channel when formerly having transmitted.At 206 places, can transmit the request to selected channel.Described request can comprise preferred channel, and (transmitter (for example, transmission node ...) wish the channel of the transmission of data thereon) bitmask, and can send to receiver (for example, receiving node, cellular phone, smart phone, radio communication device, access point ...) from transmitter.Described request can be to the request of more than first channel that in nearest time slot, is not blocked, when described more than first channel is fewer than transfer of data to request of more than second channel etc.The request message that sends at 206 places can be controlled to guarantee required reliability step at the receiver place through power extraly.

According to other side, the number of the required channel of given transmission determined it can is the function of number of the function of the function of the flexible strategy that are associated with node, the flexible strategy that are associated with other node of request channels, the channel that can be used for transmitting or any combination of aforementioned factor.For instance, flexible strategy can be the functions of grade etc. of interference of flow number, node place experience of node of flowing through.According to further feature, channel is selected to comprise channel is divided into one or more groups, and can be based in part on the resource utilization messages (RUM) that receives, one or more channels in one group of channel of described resource utilization messages (RUM) indication are disabled.Can assess RUM to determine given channel whether available (for example, not identified by RUM).For instance, if given channel is not listed, can determine that so described given channel can use in RUM.Another example is to think that channel can use, even receive RUM for described channel, but the flexible strategy of announcing of described channel are lower than the flexible strategy of announcing among the RUM that the receiver of node sends.

Fig. 3 explanation is according to the sequence of the event that asks for permission of the promoted resource distribution of one or more aspects described herein.Describe the first event train 302, it comprises the request that sends to receiver from transmitter.After receiving described request, receiver can send to transmitter with grant message immediately, all channels or channel subset that described grant message license transmitter is asked.Then, transmitter can be at some or all of grant channel transmitting datas.

According to the parties concerned, sequence of events 304 can comprise the request that sends to receiver from transmitter.Described request can comprise the tabulation of channel (transmitter be ready to transfer data to receiver) thereon.Then, receiver can send to transmitter with grant message, and all required channels or required channel subset have been permitted in described grant message indication.Then, transmitter can transmit pilot tone message to receiver, and after receiving described pilot tone message, receiver can be got back to transmitter to help to alleviate bad low SINR with the rate information transmission immediately.After receiving rate information, transmitter can be proceeded transfer of data immediately on grant channel and with indicated transmission rate.

According to the parties concerned, when transmitter can not be asked enough resources (for example, wherein transmitter is received one or more RxRUM of the most of available channels that take transmitter), can broadcast TxRUM by transmitter.Such TxRUM can deliver the information about the flexible strategy of transmitter node, and adjacent node can calculate its accordingly sharing resource with described information.In addition, can send out TxRUM with the proportional PSD of the power level of the transmission of data.To understand, need to not transmit TxRUM with constant (for example, height) PSD, because only need to make potential affected node know the condition of transmitter.

Can consider that a plurality of restrictions that can execute carry out sequence of events 302 and 304 during communication event.For instance, transmitter can be asked any channel of not yet being blocked by RxRUM in the time slot formerly.The channel of asking can be listed in preferentially, preferential to the successful channel in the nearest transmission circulation simultaneously.In the situation that does not have enough channels, transmitter can come the amount of the claim outer channel to obtain the Fairshare to it with declaration to the contention of extra channel by sending TxRUM.Then, consider the RxRUM that has received, can determine Fairshare to channel according to competition neighbor's (for example, node) number and flexible strategy.

Can be the subset of channel listed in the request from the license of receiver.Receiver can be endowed the authority of avoiding channel to represent the high interference grade between nearest transmission period.In the inadequate situation of grant channel, receiver can add channel (for example, to nearly the Fairshare of transmitter) by sending one or more RxRUM.Consider the TxRUM that receives (for example, receiving), can determine that transmitter is to the Fairshare of channel by number and the flexible strategy of (for example) assessment adjacent node.

When transmission, all channels or channel subset that transmitter can be permitted in grant message send data.After receiving RxRUM, transmitter can reduce the through-put power on the some or all of channels immediately.Receive at same channel that at transmitter transmitter can transmit by probability reciprocal in the situation of license and a plurality of RxRUM.For instance, if receive a license and three RxRUM for individual channel, transmitter can 1/3 equiprobability transmits (for example, transmitter will use the probability of channel be 1/3) so.

According to other side, can distribute too much bandwidth according to the secret sharing that discharges about above restriction.For instance, as described above, can help the Weighted fair of resource to share based on the scheduling of flexible strategy.Yet, exist in the situation of too much bandwidth, do not need to limit the distribution (for example, being higher than minimum Fairshare) of resource.For instance, can consider a kind of situation, wherein have full buffer two nodes each all have flexible strategy 100 (for example, corresponding to flow rate 100kbps), and shared channel.In the case, node shared channel comparably.If the channel quality that described node experience changes, each in two nodes can licensedly be (for example) 300kbps so.Yet, may only need to provide 200kbps to node 1, in order to make the shared 500kbps of being increased to of node 2.That is, under these situations, may share any too much bandwidth in a certain unfair mode, in order to realize larger sector throughput.Can expand weight mechanism to promote unfair sharing by plain mode.For instance, except flexible strategy, each node also can be understood the speed that it is assigned, and described information may be associated with the service that AT obtains.Node can be constantly updated its Mean Speed (continuing a certain suitable time interval), and can when being lower than assigned speed, its average throughput send out RUM, can not compete as the excess resource that surpasses its speed that is assigned to guarantee node, then, can in other secret sharing, share described excess resource.

Fig. 4 is the explanation of some topologys that helps to understand request-permission schemes according to various aspects.The first topology 402 has three links (A-B, C-D, E-F) that approach very much, and wherein each node A-F all can receive the RUM from each other node.The second topology 404 has three links that form chain, and intermediate line link (C-D) interference two peripheral links (A-B and E-F), and peripheral link is not interfering with each other.According to this example, RUM can be modeled to so that the scope of RUM is two nodes.The 3rd topology 406 comprises three links (C-D, E-F and G-H) that are positioned at right-hand side, and it is interfering with each other and can receive each other RUM.Be positioned at single link (A-B) interfering link (C-D) in left side.

According to each example, for topology as described above, the performance of three systems is described hereinafter in the table 1.In " perfect information " situation, suppose the RxRUM with bitmask and flexible strategy and have bitmask and the availability of the TxRUM of flexible strategy.In " partial information " situation, suppose the RxRUM with bitmask and flexible strategy and have flexible strategy but without the TxRUM of bitmask.At last, in the situation of " only RxRUM ", do not send out TxRUM.

Table 1

As seen from Table 1, partial information proposes to realize with less delay in the convergence Fairshare of flexible strategy.The convergence number shows that described scheme converges to the stable number of sharing the circulation that spends of available channel.Subsequently, node can continue to utilize described same channel.

Fig. 5 is being used for by using the resource utilization messages (RUM) that transmits with constant power spectral density (PSD) to manage the explanation of the method 500 of interference of one or more aspects of presenting according to this paper.The power of request message, grant message and transmission can be controlled; Yet node still may experience and cause its signal to the unacceptable excessive interference of interference-to-noise ratio (SINR) grade.In order to alleviate bad low SINR, can utilize RUM, RUM can be receiver-side (RxRUM) and/or transmitter side (TxRUM).When the level of interference on the required channel of receiver surpasses predetermined threshold level, can broadcast RxRUM by receiver.RxRUM can contain the tabulation of channel (receiver needs the channel of the interference that reduces thereon) and node flexible strategy information.In addition, power spectral density (PSD) that can be constant is transmitted RxRUM.The node transmitter of the receiver competition of transmission RxRUM (for example, with) of " receiving " RxRUM can be by stopping its transmission or coming RxRUM is reacted by the power that reduces to transmit.

For instance, in the specific deployments of radio node, at some Nodes, Carrier interference ratio (C/I) may be poorly lower, and this may hinder successfully transmission.To understand, and calculate the employed level of interference of C/I and can comprise noise, so that C/I can be expressed as C/ (I+N) similarly, wherein N is noise.In these cases, receiver can reduce its corresponding through-put power or keep out of the way to manage interference fully from indicated channel by near other node asking.At 502 places, can produce the indication to the channel (for example, in multichannel system) that represents the C/I that is lower than the first predetermined threshold.At 504 places, but message transfer, and described message comprises which channel of indication represents the information of inadequate C/I.For instance, first node (for example, receiver) can be broadcasted RUM and bitmask, and described bitmask comprises that indication has the information of the channel of poorly lower C/I.PSD that can be constant (it is known to all nodes in the network) sends RUM extraly.The node of in this way, can same PSD broadcasting the vicissitudinous power level of tool.

At 506 places, can come receipt message (for example, RUM) by other node.At 508 places, after receiving RUM, Section Point (for example, transmitter) can utilize the PSD that is associated with RUM to calculate radio frequency (RF) distance (for example, channel gain) between himself and the first node immediately.Given node can change according to the RF distance the reaction of RUM.For instance, can carry out at 510 places the comparison of RF distance with the second predetermined threshold.If RF distance is lower than the second predetermined threshold (for example, first node and Section Point are close to each other), so at 512 places, Section Point can interrupt any further transmission on the channel indicated among the RUM to alleviate interference.Perhaps, if Section Point and first node distance are each other enough far (for example, when comparing at 510 places, RF distance between the described node is equal to or greater than the second predetermined threshold), so at 514 places, Section Point can utilize the RF range information to come the value of predicted interference, and described interference will be that the first node place causes and be attributable to Section Point (if Section Point will continue channel indicated in RUM).At 516 places, level of interference and the 3rd predetermined threshold level of predicting can be compared.

For instance, the 3rd predetermined threshold can be that target heat is disturbed (interference over thermal, IOT) standing part of grade, it is at the ratio that shares interference noise power that bandwidth measures and thermal noise power (for example, be about 6dB target IOT 25%, or a certain other threshold levels).If the interference of predicting is lower than threshold levels, so at 520 places, Section Point can continue channel indicated in RUM.Yet, if the interference of predicting is determined to be equivalent to or greater than the 3rd predetermined threshold level, so at 518 places, Section Point can reduce its transmission power level, until the interference of predicting is lower than the 3rd threshold levels.In this way, can indicate interference on a plurality of channels with single message or RUM.By making interfering nodes reduce power, affected node (for example, receiver, access terminal, access point ...) can be on the subset of a plurality of channels received bit successfully, and the node that also can allow to reduce its transmission power level continues its corresponding transmission.

Referring to Fig. 6 and Fig. 7, can avoid the transmission of pattern by allowing receiver not only to be more suitable for conflicting with one or more transmitter communication sinks, but also communicate by letter it with respect to other receiver disadvantageous measured value how, promote flexible media access control.In third generation honeycomb fashion MAC, can alleviate the needs that the interference of crossing the residential quarter is avoided by using through the plan deployment scheme.Honeycomb fashion MAC realizes higher spatial efficient (position/unit are) usually, but expensive, consuming time and can not be suitable for well focus deployment through the deployment of plan.On the contrary, for example the wlan system based on those systems of 802.11 series standards has considerably less restriction to deployment, but with respect to cellular system, with dispose that cost that wlan system is associated and time saves will be take the interference stability of the increase of the part that will become MAC as cost.For instance, 802.11 series are used the MAC based on carrier sense multiple access (CSMA).CSMA is " transmission before monitor " method in itself, wherein plans the node of transmission " monitoring " media at first before transmission, determines that it is idlely, and then follows and keeps out of the way agreement.Carrier sense MAC can cause the bad utilization of the node of hiding and exposing, limited fairness control and sensitiveness.In order to overcome and the defective of disposing cellular system and joining with the Wi-Fi/WLAN System Dependent through plan, (for example can use the synchronization control channel transmission referring to Fig. 6 and the described various aspects of Fig. 7, to send request, license, pilot tone etc.), to effective use of RUM (for example, when receiver wants to disturb transmitter when keeping out of the way, described receiver can send RxRUM, transmitter can send TxRUM so that its its predetermined receiver that disturbs is known its transmission plan etc.), and by using again improved control channel reliability (for example, so that a plurality of RUM can decode simultaneously at the receiver place) etc.

According to some features, can come RxRUM is weighted with the coefficient of the unfavorable degree of indication receiver in its transmitter process of service.Then, disturb transmitter to determine ensuing action with its fact of receiving that the value of RxRUM and flexible strategy is associated with RxRUM.According to example, when receiver receives single stream, receiver can

The time send RxRUM.

Wherein RST (RUM sending threshold value) is the throughput target of described stream, R _ActualBe the actual throughput that realizes that (for example, by the one pole iir filter ...) calculates as the short-term moving average, and T is the threshold value that compares with described ratio.If receiver can not be dispatched its transmitter during particular time-slot, the speed of described time slot can be assumed to 0 so.Otherwise the speed that realizes in the described time slot is for being fed to the sample of average filter.Can be set to 1 so that when actual throughput is lower than the target throughput by threshold value T, just can produce and transmit flexible strategy.

If transmitter can be decoded to RxRUM message, so described transmitter can " be received " RxRUM.If transmitter is estimated its interference that will cause at RxRUM sender place and is lower than RUM refusal threshold value (RRT) that so described transmitter can be ignored RxRUM message according to circumstances.In this MAC design, Rx/Tx RUM, request and license can send having on the low-down control channel of using again factor (for example, 1/4 or less), and be lower to guarantee the interference effect of control information.Transmitter can be analyzed the set of its paid-in RxRUM, if and be the RxRUM of highest weight number from the RxRUM that its predetermined receiver is received, transmitter can send request and a TxRUM so, described TxRUM wins " contention " and has the right to use described channel to all receivers that can receive described transmitter (for example, comprising its oneself receiver) described receiver of indication.Hereinafter describe in more detail for sending TxRUM, processing a plurality of RxRUM that equate flexible strategy, other condition of processing a plurality of TxRUM, request etc. referring to Fig. 6 and Fig. 7.RxRUM flexible strategy and corresponding action are set at the transmitter place allow certainty solution to contention, thereby and improve to the utilization of shared medium with through the Fairshare of weighting by RST is set.Except RST (probability that is sent out of its control RxRUM) is set, RRT is set also can helps control system to avoid operational degree under the pattern in conflict.

About RST, from the system effectiveness viewpoint, can use RST so that can realize higher system throughput based on analysis which agreement under specific user's configuration, call collision avoidance protocol or while host-host protocol.From the peak rate viewpoint or can't stand the service of delay, can allow the user can system effectiveness to come bursty data with the speed of transmitting simultaneously the speed that realizes as cost to be higher than.In addition, the fixed velocity service channel of some type (for example, control channel) may need to realize specific throughput, and RST can correspondingly be set.In addition, owing to the gathering than high traffic, some node may have higher business need.It is especially true when this uses the scheduling of wireless backhaul and receiver near the node of tree root in tree.

Definite fixedly a kind of method of RST is based on the forward link edge spectrum efficiency that realizes RST is set in the cellular system of plan.When BTS is transferred to given user, the throughput that cell edge spectrum efficiency indication edge customer can be realized in cellular system, wherein the neighbor connects all the time.Poor unlike the cell edge throughput in the cellular system of plan in order to ensure the throughput of simultaneously transmission like this, can utilize this to trigger to change and entering conflict and avoid pattern (for example to improve throughput, by described transformation, can realize described improvement with the while transmission mode).According to further feature, for different user, RST may be different (for example, the user can subscribe the service of the different brackets that is associated from different RST ...).

Fig. 6 be according to one or more aspects for generation of TxRUM and the request explanation with the method 600 that helps in the wireless network of specific deployments, to provide flexible media access control (MAC).TxRUM can notify all interior receivers of monitoring scope based on the paid-in RxRUM of transmitter, and transmitter thinks that it is the one that bandwidth is had the right most.The single information bit of its existence of TxRUM delivery indication, and transmitter can following mode arrange the TxRUM position.

At 602 places, transmitter can determine whether it (for example just receives, in predetermined monitoring period ...) one or more RxRUM, from the RxRUM of its oneself receiver (for example comprise, suppose that A and B communicate and disturb C and D, A can receive the RxRUM from B, C and D so, and wherein B is its receiver), if receiver has sent a RxRUM (that is, if B has sent a RxRUM in running example).As described herein, " node " can be to access terminal or access point, and can comprise receiver and transmitter.Therefore, for example this use of describing the term (for example " transmitter " and " receiver ") in the content should be interpreted as respectively " playing the time spent of doing of transmitter when node " and " playing the time spent of doing of receiver when node ".If transmitter not yet receives any RxRUM, so at 604 places, it sends request and does not send TxRUM to its receiver.If transmitter has received at least one RxRUM, so at 606 places, can about whether receive RxRUM from the receiver (for example, being positioned at the receiver of the Nodes of transmitter ...) of transmitter oneself and make definite.If do not receive, so at 608 places, can determine to suppress to transmit TxRUM and the request that is associated.

If determining of 606 places is sure, so at 610 places, whether paid-in unique RxRUM makes further definite the RxRUM that can receive about the receiver from transmitter oneself.If so, so at 612 places, transmitter can send TxRUM and the request to transmitting.If transmitter has received a plurality of RxRUM (comprising the RxRUM from its oneself receiver), so at 614 places, transmitter can come RxRUM is sorted based on flexible strategy associated with it.At 616 places, whether the RxRUM that can receive about the receiver from transmitter oneself has the highest weight number (for example, maximum unfavorable grade) of all RxRUM that receive is made definite.If so, so at 618 places, transmitter can send TxRUM and the request to transmitting.If determining of 616 places negated that so at 620 places, transmitter can suppress to transmit TxRUM and request.Receive from the RxRUM of its oneself receiver and one or more other RxRUM and all RxRUM at transmitter and all to have in the situation of equal flexible strategy, the probability that transmitter can 1/N so sends TxRUM and request, and wherein N is the number with RxRUM of highest weight number.In one aspect, the logic of Fig. 6 can be without any TxRUM but only have in the situation of request and use.That is, whether RxRUM control node can send the request to specific resources.

As used herein, " unfavorable " can be defined as the function of the ratio of the desired value of (for example) given node and actual value.For instance, when with the unfavorable function that is measured as throughput, spectrum efficiency, data rate or a certain other parameter (wherein needing high value), when node is unfavorable, actual value will be lower than desired value relatively so.In these cases, the weighted value of the unfavorable grade of instructs node can be the function of the ratio of desired value and actual value.Hope unfavorable based on the lower situation of parameter (for example, the stand-by period) under, can utilize the inverse of the ratio of desired value and actual value to produce flexible strategy.As used herein, the node that is described as having with respect to another node " better " condition can be understood to have less unfavorable grade (node that for example, has better condition disturbs than having still less with its another node relatively, still less stand-by period, more high data rate, more high throughput, spectral efficient etc. more).

According to example, transmitter A and transmitter C can distinguish simultaneously to receiver B and receiver D transmission (for example, according to synchronized multimedia access control scheme, wherein transmitter transmits at other special time in special time transmission and receiver).Receiver B can determine and/or the amount of predetermined its interference of just experiencing, and RxRUM can be sent to for example transmitter of transmitter A and transmitter C.Receiver D does not need to monitor RxRUM, because receiver D and receiver B transmit at the same time.In order to promote described example, after the RxRUM that receives from receiver B, transmitter C can assess the condition such as receiver B indicated among the RxRUM immediately, and the condition of its oneself condition (it can be known maybe can announcing by the RxRUM that D sends for C) with receiver B can be compared.After relatively, transmitter C can take some actions immediately.

For instance, after determining that transmitter C stands the interference of low degree more than receiver B, transmitter C can keep out of the way the request of transmission by suppressing transmission immediately.In addition or alternatively, transmitter C can assess or determine that it causes at receiver B place what disturb (for example, in the situation of RxRUM with same or constant power spectral density transmission from receiver).This determines to comprise the channel gain of estimating to arrive receiver B, select transmission power level, but and the grade of determining the interference that the transmission of carrying out with selected transmission power level from transmitter C will cause at receiver B place whether surpass and be scheduled to the acceptance threshold level of interference.Determine that based on described transmitter C can select to equal previous transmission power level or less power level is transmitted.

Equal substantially in the condition of transmitter C (for example, about the unfavorable grade of the shortage of resource, interference etc.) in the situation of condition of receiver B, transmitter C can assess and/or process the flexible strategy that are associated with its paid-in RxRUM.For instance, if transmitter C has received four RUM (having flexible strategy 3,5,5 and 5), and as the one 5 the flexible strategy (for example have from the RxRUM that receiver B receives, have the flexible strategy of heavy flexible strategy that equal all RxRUM that transmitter C receives), C will send request with probability 1/3 so.

Fig. 7 explanation is according to the method 700 for generation of the license that transmission is asked of one or more aspects.At 702 places, but request and TxRUM that receiver assessment its nearest (for example, during the monitoring period that defines in advance ...) is received or received.If not yet receive request, so at 704 places, receiver can suppress to send grant message.If received at least one request and TxRUM, so at 706 places, can whether make definite from the transmitter that receiver is served about received TxRUM.If not, so at 708 places, receiver can suppress to send license.If so, so at 710 places, receiver can determine whether the transmitter that all received TxRUM serve from receiver.

If determining of 710 places is sure, can produces so license at 712 places and send it to one or more request transmitters.If 710 places determine negate, and except the TxRUM of the transmitter of not serving from receiver, receiver has received the TxRUM from its oneself transmitter, so at 714 places, can be about the rolling average of transmission rate whether more than or equal to R _TargetMake definite.If the rolling average of transmission rate is more than or equal to R _Target, so at 716 places, receiver can suppress to permit requested resource.If not, so at 718 places, the probability that receiver can 1/N sends license, and wherein N is the number of the TxRUM that receives.On the other hand, TxRUM can comprise as the flexible strategy among the RxRUM, and (at least one is from a transmitter in its transmitter when receiving a plurality of TxRUM, and one is from another transmitter) time, whether make license by the transmission of the one in its transmitter based on the TxRUM with highest weight number so.In the situation of the binding with a plurality of TxRUM (comprising a TxRUM from the one in its transmitter) that are in the highest weight number, m/N sends license with probability, wherein N is the number of the TxRUM that is in the highest weight number that receives, and wherein m TxRUM is from the transmitter of described receiver.

According to the parties concerned, receiver can be periodically and/or constantly assessment its whether have untreatment data from the sender.If if receiver has received current request or it has received the previous request that it is not permitted, this is correct so.In either case, whenever average transmission rate is lower than R _Target, receiver just can send out RxRUM.In addition, after the request of license transmitter, transmitter is transmitting data frame immediately, and described Frame can be received by receiver.If for transmitter-receiver concerning have untreated data, renewable Mean Speed information for connecting of transmitter and receiver so.

Fig. 8 be according to one or more aspects be used for realize competing the explanation of the method 800 of the fairness between the node by the number of regulating channel (transmitting RUM for it) according to the unfavorable grade that is associated with given node.About previous graphic the description, send out RxRUM and just experiencing bad communication condition and wanting to reduce the interference that it is faced with the indication receiver as mentioned.RxRUM comprises flexible strategy, and it quantizes the unfavorable degree that node is just experiencing.According on the one hand, can flexible strategy be set to equal the average throughput of RST/.Herein, RST is the average throughput of node expectation.When transmission node was received a plurality of RxRUM, it can utilize corresponding flexible strategy to solve contention between described a plurality of RxRUM.If have the receiver that the RxRUM of highest weight number is derived from transmitter oneself, transmitter can determine transmission so.If not, transmitter can suppress transmission so.

Transmitter sends out TxRUM declaring transmission on the horizon, and described TxRUM has two purposes.The first, TxRUM makes receiver know its RxRUM and has won local contention, so receiver can go scheduled transmission.The second, TxRUM notifies other contiguous receiver interference on the horizon.When system supported a plurality of channel, except flexible strategy, RUM also can deliver bitmask.The channel that bitmask indicates this RUM to use thereon.

RxRUM permission node is removed the interference among its next-door neighbour person, may be induced to suppress transmission because receive the node of RxRUM.Although flexible strategy allow fair contention (for example, have maximum disadvantageous node and win), having multi-channel MAC can provide another degree of freedom.Node can send for it RxRUM channel number can based on its for the unfavorable degree of the node with very bad history to catch up with sooner.When the transmission rate that receives in response to it when RxRUM success and node was improved its condition, node can reduce the number of channel (node sends RxRUM for described channel).If because the cause of heavy congestion, RUM at first not success and throughput do not improve, node can increase the number of channel (described node sends RUM for described channel) so.In very congested situation, it is highly unfavorable that node may become, and may send RxRUM for all channels, thereby be degenerated to single carrier case.

According to described method, at 802 places, can determine the unfavorable grade of node, and can produce RUM with the unfavorable grade of other node in the indication monitoring scope.For instance, can be the function of the received grade of service of Nodes with unfavorable classification, it may be subjected to various parameters (such as stand-by period, IOT, C/I, throughput, data rate, spectrum efficiency etc.) impact.At 804 places, can select to send for it number of the channel of RUM, its can with unfavorable grade quite (for example, unfavorable larger, the number of channel is larger).At 806 places, can be for transmission RUM.At 808 places, but the service quality of measured node (QoS), and whether the unfavorable condition with definite node of assessment is improved again.At 810 places, can be based on the QoS that measures and metering needle transmits the subsequently number of the channel of RUM to it.For instance, if the QoS of node does not improve or worsens, so at 810 places, can increase for it and transmit the subsequently number of the channel of RUM, to improve the grade of the received service of Nodes.If the QoS of node improves, so at 810 places, can reduce transmit the channel of RUM subsequently for it number to preserve resource.Described method can turn back to 806 with further repetition RUM transmission, service valuation and channel number adjusting.So close to increase or reduce the decision of the number of the channel that sends RUM for it and can also be the function that QoS that node is just using measures.For instance, increase (based on the unfavorable grade that continues or worsen) may be measured throughput/data rate type meaningful for its number that sends the channel of RUM, but really not so to the latency metric possibility.

According to the parties concerned, can take over more the channel of big figure for use than the node of low priority and incorporate into than having by the node that allows to have higher-priority based on the priority of node and/or service based.For instance, disadvantageous video call device can once receive eight channels, and similar disadvantageous audio call device receives only two carrier waves.The maximum number of the obtainable channel of node also may be limited.The upper limit can be by the type of the business that is just delivering (for example, little voice packet does not need several with upper signal channel usually), the power stage of node (for example, weak transmitter can not launch its power in too large bandwidth), receive PSD etc. apart from the distance of receiver and gained and determine.In this way, further reduce disturbance and the saving of improvement resource of method 800.Other side provides the number of indicating the channel of distributing to node with bitmask.For instance, can utilize 6 bitmasks to indicate can be for sending RUM to reaching six channels.Node can ask extraly interfering nodes be suppressed at transmit on the subcarrier that distributes to some extent or the subsets of subcarriers.

Fig. 9 is the explanation according to the RxRUM transmission of carrying out with constant power spectral density (PSD) between two nodes of one or more aspects.When node experience severe jamming, node can be from restriction by being benefited the caused interference of other node, and restriction allows again better space to use and through improved fairness by the caused interference of other node again.In 802.11 protocol families, use request to realize fairness to sending (RTS) and being scavenged into transmission (CTS) bag.Receive the node stop transmission of RTS, and allow requesting node successfully to transmit described bag.Yet this mechanism causes the plurality destination node unnecessarily to disconnect usually.In addition, node can total power send RTS and CTS in whole bandwidth.If some nodes have higher power than other node, the RTS of so different nodes may be different with the scope of CTS.Therefore, may be subjected to the strong low power nodes of disturbing of high power node to cut off the high power node by RTS/CTS, because the high power node will be outside the scope of low power nodes.In the case, the high power node is the node of permanent " hiding " for low power nodes.Even low power nodes sends to one in its transmitter or the receiver with RTS or CTS, low power nodes also can not be cut off the high power node.Therefore, 802.11MAC requires all nodes to have equal power.Particularly from the viewpoint of coverage, this has introduced restriction in performance.

The mechanism of Fig. 9 helps for one or more channels and at the RUM of the Nodes broadcasting that just stands bad low SINR from receiver.Known PSD that can be constant transmits RUM, and not the transmit power capabilities of pipe node how, and the PSD that receives of receiving node observable, and calculate channel gain between himself and the RUM transmission node.In case channel gain is known, receiving node just can determine to cause at RUM transmission node place the amount of the interference of (for example, part is based on its own through-put power), and can determine whether temporarily inhibition is transmitted.

Node in network has in the situation of different through-put powers, receives the node of RUM can determine whether close with the channel gain that calculates based on its corresponding known transmission power.Therefore, the low-power transmission device does not need unnecessarily to cut out, because it will can not cause remarkable interference.Therefore in this way, can only close the node that causes interference, alleviate the defective of the mentioned conventional RTS-CTS mechanism in front.

For instance, first node (node A) can be at the RxRUM of channel h reception from Section Point (Node B).Can transmit described RxRUM by power level pRxRUM, and can assess the signal value X that receives, multiply by through-put power pRxRUM and add noise so that X equals the summation of channel h.Then, node A can carry out channel estimation protocol, with by making received signal value estimate h divided by XpRxRUM.If the flexible strategy of Node B are higher than the flexible strategy of node A, so by making channel estimating multiply by required through-put power (p _A), node A can further estimate the interference that node A transmission may cause Node B, so that:

I _A＝hest*p _A

I wherein _AMake node A in the caused interference in Node B place.

According to example, consider that it is the system of 5MHz that maximum transmission power M is confirmed as 2 watts and minimum transfer bandwidth, so maximum PSD is 2 watts/5MHz or 0.4W/MHz.Minimum transmission power in the supposing the system is 200mW.Then, the RUM scope of being designed to is equaled the scope of the maximum permission PSD in the system.The data rate of then selecting to be used for this power spectral density of 200mW transmitter and to be used for RUM comes balanced those scopes.Be for illustration purposes and exist understanding previous examples, and system described herein and/or the method particular value that is not limited to above present, but can utilize any suitable value.

Figure 10 uses constant PSD with the explanation of the method 1000 of the amount of the interference that helps to estimate to be caused at the Section Point place by first node according to for the RUM transmission of being used for of one or more aspects.At 1002 places, first node can receive RxRUM from Section Point by known PSD.At 1004 places, first node can calculate based on known PSD the channel gain between himself and the Section Point.At 1006 places, at least in part based on the channel gain that calculates in 1004 places, first node can be estimated with the transmission PSD that is associated with its oneself transmission the amount of the interference that first node may cause at the Section Point place.At 1008 places, Interference Estimation value and predetermined threshold can be compared, be should transmit or should suppress to transmit to determine first node.If estimated value is greater than predetermined threshold, so at 1012 places, first node can suppress transmission (described transmission can comprise the transmission of data or transmission request).If estimated value is less than predetermined threshold, so at 1010 places, first node can transmit, because it does not disturb Section Point substantially.To understand, near a plurality of receiving nodes in Section Point given can be received the RxRUM that Section Point transmits, and whether each executing method 1000 in the described receiving node should transmit to assess it.

According to another example, Section Point can (for example) 200 milliwatts transmit, and first node can 2 watts of transmission.In this case, Section Point can have the transmission radius for r, and first node can have the transmission radius for 10r.Therefore, the distance that first node can be positioned on than the common transmission of Section Point or reception extremely reaches 10 times position from Section Point, but because the through-put power of first node is higher, so may still can disturb Section Point.In this case, Section Point can raise between the RxRUM transmission period, and it transmits PSD, receives described RxRUM to guarantee first node.For instance, Section Point can maximum can allow PSD (it can define in advance for given network) to transmit RxRUM.Then, as described above, first node executing method 1000 also determines whether transmission.

Figure 11 explanation is used in the method 1100 that responds interference control bag under plan and/or specific wireless communication environment according to various aspects.At 1102 places, can receive at the Section Point place RxRUM from first node.At 1104 places, can produce measurement value based on the predetermined value that is associated with RUM at least in part.For instance, when receiving RUM at 1102 places, the known RUM_Rx_PSD of receiving node (for example, Section Point) maybe can determine RUM_Rx_PSD by estimating RUM received power, RUM_Tx_PSD (known constant of system) and data _ Tx_PSD (RUM receiving node want with the PSD of its data of transmission).RUM_Tx_PSD and RUM_Rx_PSD also quantize with dBm/Hz, and wherein the former is constants for all nodes, and the latter is depended on channel gain.Similarly, data _ Tx_PSD measures with dBm/Hz, and can be depending on the power stage that is associated with node.Measuring that 1104 places produce can be expressed as:

Measure=data _ Tx_PSD+ (RUM_Rx_PSD-RUM_Tx_PSD)

The estimated value that may disturb that its expression may cause at other Nodes RUM transmission node (for example, for TxRUM) or RUM receiving node (for example, for RxRUM).

At 1106 places, measurement value and the predetermined RUM refusal threshold value (RRT) that defines with dBm/Hz can be compared.If described measuring more than or equal to RRT, so at 1108 places, Section Point can be in response to RUM.If measure less than RRT, so at 1110 places, Section Point can suppress in response to node (for example, because it will can not disturb first node substantially).Response at 1108 places to RUM can be removed thermal noise N ₀(measuring with dBm/Hz) upward with greater than the heat of predetermined value Ω (measuring with decibel) disturbs the relevant interference of (IOT) ratio (for example, so that measure 〉=Ω+N ₀).All be noiseless in order to ensure all essence potential interferences, RRT can be arranged so that RRT=Ω+N ₀When the unfavorable degree that it should be noted that the flexible strategy indications RUM sender who only announces on RUM was larger than RUM recipient's unfavorable degree, the RxRUM receiving node was just born and is determined that whether the RRT threshold value is with being satisfied of task.

Figure 12 is according to the explanation of various aspects as described above for generation of the method 1200 of RxRUM.At 1202 places, can produce at the first node place RUM, wherein said RUM comprises the information that indication the first predetermined threshold has been satisfied or has surpassed.The first predetermined threshold can represent that (for example) thermal noise disturbs the grade, data rate, Carrier interference ratio (C/I), the grade of throughput, grade, the grade of stand-by period or any other suitable being used for of spectrum efficiency of (IOT) to measure the index of the service at first node place.At 1204 places, can be weighted the degree of indicating the second predetermined threshold to be exceeded to RUM.According to some aspects, the flexible strategy value can be through quantized value.

The second predetermined threshold can represent that (for example) thermal noise disturbs the grade, data rate, Carrier interference ratio (C/I), the grade of throughput, grade, the grade of stand-by period or any other suitable being used for of spectrum efficiency of (IOT) to measure the index of the grade of service at first node place.Although the first predetermined threshold can equate substantially that with the second predetermined threshold they do not need to equate.In addition, the first predetermined threshold and the second predetermined threshold can with different parameters (for example: respectively with IOT and C/I; Respectively with stand-by period and data rate; Or any other arrangement of described parameter) is associated.At 1206 places, the RUM through weighting can be transferred to one or more other nodes.

Figure 13 is the explanation according to the method 1300 that is used for one or more RxRUM that receive of response of one or more aspects.At 1302 places, can receive RxRUM from second (or more) nodes at the first node place.Described RxRUM can comprise and the relevant information of condition (for example, unfavorable grade as described above) of Section Point that at 1304 places, first node can utilize described information to determine the condition of Section Point.At 1306 places, the condition of Section Point and the condition of first node can be compared.At 1308 places, described comparison can allow to determine whether the transmission of data.

For instance, if the described condition of first node of relatively indicating is better than the condition of Section Point, first node can suppress to send data (for example, to keep out of the way and allow more disadvantageous Section Point more effectively to communicate) so.The grade of the interference that first node can continue to determine that first node may cause at the Section Point place in addition or alternatively, if the condition of first node is better than the condition of Section Point, is described referring to Figure 10 so as mentioned.This determines to comprise that (for example) utilize known firm power or known firm power spectrum density (Section Point transmits RxRUM with it), estimate the channel gain between first node and the Section Point, the transmission power level of the transmission of selection from the first node to the Section Point, the grade of the interference that the transmission that estimation is carried out with selected power level will cause at the Section Point place, and determine whether the estimated level of interference that goes out surpasses and predeterminedly can accept the interference threshold grade.

Described condition of relatively indicating first node than the poor situation of the condition of Section Point under, first node can select to ignore RUM.According on the other hand, have at first node and Section Point in the situation of the condition that equates substantially, describe referring to Fig. 6 as mentioned, can use the flexible strategy treatment mechanism.According to other side, as described in reference to Figure 11, can utilize information contained among the RUM to produce measurement value, it can be refused threshold value (RRT) with RUM and compare, to determine whether to respond described RUM.According to other side, after 1308 places determined the transmission of data, this transmission can be included on the first channel immediately and send communication data, sends message in the first channel request, and/or send request at second channel and send message, its request sends data at the first channel.

On the other hand, can comprise extraneous information and request to help scheduler to know the result that the RxRUM of Nodes processes.For instance, suppose that A transfers data to B and C transfers data to D.Suppose that B and D both send out RxRUM, but the employed flexible strategy of B are than the employed flexible strategy of D high (more unfavorable).Then, A can send to request B (because it is processed received RxRUM and concludes that its receiver (being B) is worst) and comprise " the best " position, the rheme indication A of institute wins contention, and because it can not keep winning and should promptly being dispatched in future.On the contrary, C will process described RUM and conclude that C can not ask.Yet although C can make D know that C can not be scheduled current, C has data to be sent and D should adhere to sending RxRUM.For instance, if D does not receive any request, its possible errors ground concludes that the neither one transmitter has any data to be sent and may stop to send RxRUM in its transmitter so.In order to prevent this from occurring, C sends has it by " request " from the indication of its person's RxRUM " blocking-up ".This will serve as the indication to D: at the current C that do not dispatch, but keep sending RxRUM, expectation C will win contention at certain some place.

Figure 14 shows example wireless communication system 1400.For the sake of brevity, wireless communication system 1400 is described a base station and a terminal.Yet, should be appreciated that described system can comprise an above base station and/or an above terminal, wherein for hereinafter described exemplary base station and terminal, additional base stations and/or terminal can be similar or different substantially.In addition, should be appreciated that base station and/or terminal can use method described herein (Fig. 2, Fig. 5 are to Fig. 8 and Figure 10 to Figure 13) and/or system (Fig. 1, Fig. 3, Fig. 4, Fig. 9 and Figure 15 are to Figure 18) to promote radio communication therebetween.For instance, node in the system 1400 (for example, base station and/or terminal) can store and carry out be used to carry out method as described above (for example, produce RUM, respond RUM, determine that node is unfavorable, select to be used for the number of the subcarrier of RUM transmission) any one instruction and with carry out described action and be used for carrying out the data that any other appropriate action of variety of protocol described herein is associated.

Now referring to Figure 14, on down link, at access point 1405 places, transmission (TX) data processor 1410 pairs of business datums receive, format, coding, alternation sum modulation (or symbol mapping), and modulation symbol (" data symbol ") is provided.Symbol modulator 1415 receives and deal with data symbol and frequency pilot sign, and symbol stream is provided.1415 pairs of data of Symbol modulator and frequency pilot sign carry out multiplexed, and they are provided to transmitter unit (TMTR) 1420.Each transmission symbol can be data symbol, frequency pilot sign or zero signal value.Can be when each symbol interim constantly pilot symbol transmitted.Frequency pilot sign can be through frequency division multiplex (FDM), Orthodoxy Frequency Division Multiplex (OFDM), time division multiplexing (TDM), frequency division multiplex (FDM) or code division multiplex (CDM).

TMTR 1420 receives described symbol stream, and converts thereof into one or more analog signals, and further regulates (for example, amplification, filtering and up-conversion) described analog signal, the down link signal that is adapted at transmitting on the wireless channel with generation.Then, by antenna 1425 with described downlink signal transmissions to terminal.At terminal 1430 places, antenna 1435 receiving downlink signals, and the signal that receives is provided to acceptor unit (RCVR) 1440.Acceptor unit 1440 is regulated the signal that (for example, filtering, amplification and frequency reducing conversion) receives, and the signal through regulating is carried out digitlization to obtain sample.The frequency pilot sign that symbol demodulator 1445 receives carries out demodulation, and it is provided to processor 1450 to be used for channel estimating.Symbol demodulator 1445 is further estimated from the frequency response of processor 1450 receiving downlinks, (it is the estimation to the data symbol that transmitted) estimated in the data symbol executing data demodulation that receives to obtain data symbol, and described data symbol estimated to be provided to RX data processor 1455,1455 pairs of data sign estimation of RX data processor are carried out demodulation (namely, symbol de-maps), release of an interleave and decoding, with the business datum of recovering to be transmitted.At access point 1405 places, the processing that symbol demodulator 1445 and RX data processor 1455 carry out is complementary with the processing that Symbol modulator 1415 and TX data processor 1410 carry out respectively.

On up link, TX data processor 1460 processing service data also provide data symbol.Symbol modulator 1465 receives and makes data symbol and frequency pilot sign multiplexed, carries out modulation, and provides symbol to flow.Then, transmitter unit 1470 receives and processes described symbol and flow to produce uplink signal, and described signal is transferred to access point 1405 by antenna 1435.

At access point 1405 places, come the uplink signal of self terminal 1430 to process to obtain sample by antenna 1425 receptions and by acceptor unit 1475.Then, symbol demodulator 1480 is processed described sample, and received frequency pilot sign is provided and the data symbol of up link is estimated.RX data processor 1485 processing said data sign estimation are to recover the business datum by terminal 1430 transmission.1490 pairs of each effective terminals of transmitting in up link of processor are carried out channel estimating.A plurality of terminals can be uploaded transporting frequently in its pilot subband sets that is assigned accordingly simultaneously on up link, wherein said pilot subband sets can be interlocked.

Processor 1490 and 1450 instructs respectively the operation at (for example, control, coordination, management etc.) access point 1405 and terminal 1430 places.Corresponding processor 1490 and 1450 can be associated with program code stored and data storage device unit (not shown ).Processor 1490 and 1450 also can be carried out to calculate with the derived score safety pin frequency and the impulse response of up link and down link are estimated.

For multi-address system (for example, FDMA, OFDMA, CDMA, TDMA etc.), a plurality of terminals can be transmitted in up link simultaneously.For this type systematic, pilot subband can be shared between different terminals.Can in the pilot subband of each terminal situation across whole operational frequency bands (may except band edge), use channel estimation technique.This type of pilot subband structure of needs is obtained the frequency diversity of each terminal.Technology described herein can be implemented by the whole bag of tricks.For instance, these technology can hardware, the form of software or its combination implements.For the hardware implementation scheme, the processing unit that is used for channel estimating may be implemented in one or more application-specific integrated circuit (ASIC)s (ASIC), digital signal processor (DSP), digital signal processing device (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor, through design with other electronic unit or its combination of carrying out function described herein in.About software, embodiment can realize by the device (for example, program, function etc.) of carrying out function described herein.Software code can be stored in the memory cell, and is carried out by processor 1490 and 1450.

For the implement software scheme, the modules/devices of available execution function described herein (for example, program, function etc.) is implemented technology described herein.Software code can be stored in the memory cell, and is carried out by processor.Memory cell may be implemented in the processor or processor outside, under latter event, memory cell can be coupled to processor communicatedly via various devices known in the technique.

The various modules that now turn to Figure 15 to describe to Figure 18 and about it will be understood, and the module that is used for transmission can comprise (for example) transmitter and/or to may be implemented in processor medium.Similarly, the module that be used for to receive can comprise receiver and/or to may be implemented in processor medium.In addition, be used for comparing, determine, calculate and/or carrying out other module of analyzing action and can comprise processor, it is carried out and is used for carrying out various and instruction corresponding actions.

Figure 15 is the explanation according to the equipment 1500 of the promotion RFDC of various aspects.Equipment 1500 is expressed as a series of correlation function block, and it can represent the function by processor, software or its combination (for example, firmware) enforcement.For instance, equipment 1500 for example can be provided for carrying out above the module about each graphic described exercises.Equipment 1500 comprises the module 1502 for the number of determining the channel that transmission is required.Can be with the function of number of the channel determining to be implemented as the flexible strategy that are associated with the node that uses therein described equipment, the flexible strategy that are associated with one or more other nodes, can be used for transmitting etc.In addition, each flexible strategy can be the function of the flow number supported of the node that is associated with described flexible strategy.In addition or alternatively, given flexible strategy can be the functions of the interference that stands of node.

Equipment 1500 comprises additionally that for the module 1504 of selecting described module selects node can transmit for it channel of request.The module 1504 of be used for selecting additionally can be assessed the resource utilization messages (RUM) that receives, with determine which channel be available and which channel disabled.For instance, each RUM can comprise the information that is associated with unavailable channel, and the module 1054 that is used for selecting can determine not to be that the given channel by the RUM indication is available.The module 1506 that is used for sending can be transmitted the request for module 1504 selected at least one channel that are used for selecting.To understand, equipment 1500 can be at access point, use in accessing terminal etc., and can comprise any suitable functional to carry out the whole bag of tricks described herein.

Figure 16 is the explanation that promotes the equipment 1600 of radio communication according to the use resource utilization messages (RUM) of one or more aspects.Equipment 1600 is expressed as a series of correlation function blocks, and it can represent the function by processor, software or its combination (for example, firmware) enforcement.For instance, equipment 1600 for example can be provided for carrying out above the module about previous graphic described exercises.Equipment 1600 comprises that it determines the unfavorable grade of node for the module 1602 of determining; With the module 1604 for generation of RUM, be positioned at or be lower than predetermined threshold level if the module of be used for determining 1602 is determined the grade of Nodes or the service that receives, the module 1604 for generation of RUM produces RUM so.The module 1606 that is used for selecting can be selected one or more resources (it is sent RUM), and then, can be at this type of channel of RUM indicating for generation of the module 1604 of RUM.Then, can transmit described RUM for the module 1608 of transmission.

Be used for selecting the module 1606 of resource can regulate the number of selected resource, for described resource, conquer the improved RUM that determines to transmit subsequently in response to previous RUM of affair grade based on the docking of the module 1602 that is used for determining subsequently.For instance, in the case, the module 1606 of be used for selecting can be in response to the number that reduces the indicated resource of subsequently RUM through the improved reception grade of service of Nodes, and can increase in response to that reduce or the static reception grade of service number of selected resource.According to other side, the module 1602 of be used for determining can be defined as the reception grade of service of Nodes the one or more function of any other proper parameter of the received service of data rate, spectrum efficiency, throughput, Carrier interference ratio or Nodes that thermal noise interference, stand-by period, node place realize.To understand, equipment 1600 can be at access point, use in accessing terminal etc., and can comprise any suitable functional to carry out the whole bag of tricks described herein.

Figure 17 is the explanation that produces resource utilization messages (RUM) and RUM is weighted to indicate the equipment 1700 of unfavorable grade of helping according to various aspects.Equipment 1700 is expressed as a series of correlation function blocks, and it can represent the function by processor, software or its combination (for example, firmware) enforcement.For instance, equipment 1700 for example can be provided for carrying out above about each the graphic and modules exercises described as described above.Equipment 1700 comprises the module 1702 for generation of RUM, and described module can produce the RUM that indication the first predetermined threshold has been exceeded.Described the first predetermined threshold can represent and/or disturb the threshold levels, data rate, Carrier interference ratio (C/I), the grade of throughput, the grade of spectrum efficiency, the grade of stand-by period etc. of (IOT) to be associated with thermal noise.

Equipment 1700 can additionally comprise for the module 1704 that RUM is weighted, described module can be come RUM is weighted with the value of the degree of indicating the second predetermined threshold to be exceeded, it can comprise the actual value of the parameter (for example, thermal noise disturbs (IOT), data rate, Carrier interference ratio (C/I), the grade of throughput, the grade of spectrum efficiency, the grade of stand-by period etc.) of determining the node place and realizing and the ratio of target or desirable value.In addition, can be value through quantizing through the value of weighting.To understand, equipment 1700 can be at access point, use in accessing terminal etc., and can comprise any suitable functional to carry out the whole bag of tricks described herein.

Figure 18 is to determine which node is the explanation of worst equipment 1800 according to the relative conditon that helps comparison wireless communications environment lower node place of one or more aspects.Equipment 1800 is expressed as a series of correlation function blocks, and it can represent the function by processor, software or its combination (for example, firmware) enforcement.For instance, equipment 1800 for example can be provided for carrying out above the module about each graphic described exercises.Equipment 1800 can use in first node, and comprises that for the module 1802 that receives RUM, described module receives RUM from least one Section Point.Equipment 1800 can additionally comprise: be used for definite module 1804, described module is determined the condition of Section Point based on the information that is associated with the RUM that receives from Section Point; And being used for module 1806 relatively, described module compares the condition of first node and the condition of determined Section Point.Then, being used for definite module 1804 can relatively come further to determine whether in the first channel data based on described.

According to each other side, to whether transmitted determine can based on the condition of first node whether better than the condition of Section Point, to equal the conditioned disjunction of Section Point substantially poorer than the condition of Section Point.In addition, the module 1804 that is used for determining can send message in the first channel request at the first channel data-signal, or sends message in second channel transmission request.Under latter event, the request transmission message that sends at second channel can comprise the request in the first channel data.To understand, equipment 1800 can be at access point, use in accessing terminal etc., and can comprise any suitable functional to carry out the whole bag of tricks described herein.

The content of above having described comprises the example of one or more aspects.Certainly, can not describe in order to describe aforementioned aspect the combination of each assembly that can expect or method, but those skilled in the art will appreciate that the many other combination and permutation of various aspects are possible.Therefore, described aspect is intended to comprise all these type of changes, the modifications and variations in the spirit and scope that belong to appended claims.In addition, " comprise " in detailed description or claims with regard to term and to use, described term is intended to be similar in mode that term " comprises " is included in as " comprising " explained when the transition word in being used as claim.

Claims (33)

1. method that promotes RFDC, it comprises:

Determine the number from the required channel of the transmission of node; The wherein said flexible strategy of determining to be associated with described node, be used for the function of the flexible strategy that other node of transfer of data is associated with the described channel of request;

Selective channel, wherein to the selection of available channel prior to unavailable channel; And

Transmission is to the request of one group of at least one selected channel.

2. method according to claim 1, wherein each flexible strategy is functions of the flow number supported of its respective nodes.

3. method according to claim 1, wherein each flexible strategy is functions of the level of interference that stands of its respective nodes.

4. method according to claim 1, wherein selective channel comprises channel is divided into a group or more channel, and the disabled resource utilization messages of subset (RUM) that receives described group of channel of indication.

5. method according to claim 4, it comprises that further the described RUM of assessment is available or unavailable with the given channel of assessment.

6. method according to claim 4, it further comprises each channel decomposing in the described group of channel is become one or more time slots.

7. method according to claim 4, it further comprises each channel decomposing in the described group of channel is become one or more subcarriers.

8. method according to claim 4, it further comprises each channel decomposing in the described group of channel is become one or more subcarriers, and resolves into one or more time slots.

9. method according to claim 1, it further comprises determines whether described given channel is not available when receiving RUM for given channel.

10. method according to claim 1, wherein said node comprises access point.

11. comprising, method according to claim 1, wherein said node access terminal.

12. an equipment that promotes RFDC, it comprises:

Determination module, it determines the number from the required channel of the transmission of described equipment; The wherein said flexible strategy of determining to be associated with described equipment, be used for the function of the flexible strategy that other node of transfer of data is associated with the described channel of request;

Select module, its selective channel, wherein to the selection of available channel prior to unavailable channel; And

Transport module, it sends the request to one group of at least one selected channel.

13. equipment according to claim 12, wherein each flexible strategy is functions of the flow number supported of its respective nodes.

14. equipment according to claim 12, wherein each flexible strategy is functions of the level of interference that stands of its respective nodes.

15. equipment according to claim 12, wherein said selection module is divided into a group or more channel with channel, and receives the disabled resource utilization messages of subset (RUM) of described group of channel of indication.

16. equipment according to claim 15, the described RUM of wherein said selection module estimation is available or unavailable with the given channel of assessment.

17. equipment according to claim 15, wherein said selection module becomes one or more time slots with each channel decomposing in the described group of channel.

18. equipment according to claim 15, wherein said selection module becomes one or more subcarriers with each channel decomposing in the described group of channel.

19. equipment according to claim 15, wherein said selection module becomes each channel decomposing in the described group of channel one or more subcarriers and resolves into one or more time slots.

20. equipment according to claim 12, wherein said selection module determine whether described given channel is not available when receiving RUM for given channel.

21. equipment according to claim 12, wherein said equipment comprises access point.

22. comprising, equipment according to claim 12, wherein said equipment accesses terminal.

23. an equipment that promotes RFDC, it comprises:

For the device of determining from the number of the required channel of the transmission of described equipment; The wherein said function of determining the number of the flexible strategy that are associated with described equipment, the flexible strategy that are associated with other node of asking described channel to be used for transfer of data and channel;

The device that is used for selective channel, wherein to the selection of available channel prior to unavailable channel; And

Be used for sending the device to the request of one group of at least one selected channel.

24. equipment according to claim 23, wherein each flexible strategy is functions of the flow number supported of its respective nodes.

25. equipment according to claim 23, wherein each flexible strategy is functions of the level of interference that stands of its respective nodes.

26. equipment according to claim 23, wherein said device for selective channel is divided into a group or more channel with channel, and receives the disabled resource utilization messages of subset (RUM) of described group of channel of indication.

27. equipment according to claim 26, it is available or unavailable with the given channel of assessment that wherein said device for selective channel is assessed described RUM.

28. equipment according to claim 26, wherein said device for selective channel becomes one or more time slots with each channel decomposing of described group of channel.

29. equipment according to claim 26, wherein said device for selective channel becomes one or more subcarriers with each channel decomposing of described group of channel.

30. equipment according to claim 26, wherein said device for selective channel becomes each channel decomposing of described group of channel one or more subcarriers and resolves into one or more time slots.

31. equipment according to claim 23, wherein said device for selective channel determine whether described given channel is not available when receiving RUM for given channel.

32. equipment according to claim 23, wherein said equipment comprises access point.

33. comprising, equipment according to claim 23, wherein said equipment accesses terminal.

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