CN101207541A - Access point circuit for supporting multi-terminal devices and method thereof - Google Patents
Access point circuit for supporting multi-terminal devices and method thereof Download PDFInfo
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Abstract
A wireless network infrastructure that adapts frame parameters of concurrent interfering receptions in response to the dynamically varying channel conditions. The channel conditions are determined by number of associated wireless end point devices within a cell, their capabilities, anticipated bandwidth usage, QOS (Quality Of Service) demands, priority of service and idle states, cell overlap interferences, near-far interferences and noises. The wireless network infrastructure contains a wireless access point within the cell that assigns a mode to a frame or sub-frame and adapts to channel conditions by varying mode durations and payload lengths. The modes include single transmission mode, plurality of partial concurrent interfering transmission modes and full concurrent interfering transmission mode. These modes allow single as well as concurrent interfering transmissions and receptions of varying payload lengths.
Description
Technical field
The present invention relates to wireless communication system, relate in particular to the WAP (wireless access point) in the packet switching network.
Background technology
Now, WAP (wireless access point) is used widely, because they can provide the mobile computing device wireless access to backbone network in the WLAN (wireless local area network) of public and personal audience venue.WLAN (wireless local area network) comprises the WAP (wireless access point) that can offer the wireless route service of a plurality of mobile radio terminal devices.The most outstanding backbone network is internet (Internet), and another one is in-house network (Intranet).Therefore, nowadays WAP (wireless access point) is provided to the wireless access of internet in a lot of public places such as hotel, airport, public building and family.
The example of terminal wireless equipment comprises individual or laptop computer, server, set-top box and hand-held data/communication apparatus.Frequent a plurality of WAP (wireless access point) bridge joint is together to provide wider covering.Communication between WAP (wireless access point) and the terminal wireless equipment is based on that the rule that pre-defines or protocol suite realize.
A plurality of factors of forming channel status comprise quantity, bandwidth use, QOS (service quality), service priority, interference and the noise of wireless terminal device relevant in the sub-district.For example hotel and airport under PE, these channel statuss can dynamic changes in a time cycle, and the user is caused inconvenience.This inconvenience is to show with the form that postpones and break in essence.
After comparing by the many aspects of introducing in conjunction with the accompanying drawings with the application's further part of the present invention, these and other restriction and the drawback of prior art are more prone to understand to one skilled in the art.
Summary of the invention
Describing and details of the present invention description and claims, will further provide device of the present invention and method of operation in conjunction with accompanying drawing hereinafter is concise and to the point.
According to an aspect of the present invention, provided a kind of access point circuit of supporting a plurality of terminal equipments, described access point circuit comprises:
In present frame, receive the receiver circuit of the concurrent interference transmission that comes from a plurality of terminal equipments;
With the treatment circuit that described receiver circuit communicates to connect, be used to detect described concurrent interference transmission;
The transmitter circuitry that communicates to connect with described treatment circuit;
Described treatment circuit produces the instruction in order at least one frame parameter that changes next frame based on the variation of channel status;
Described treatment circuit is sent in described a plurality of terminal equipment at least one to described instruction by transmitter circuitry, can adapt to the variation of described channel status with at least one frame parameter in described next frame; With
Described treatment circuit detects the concurrent interference transmission that comes from described a plurality of terminal equipments that receives in described next frame.
As preferably, described treatment circuit transmits described instruction so that at least one frame parameter can adapt to described channel state variations when next frame begins.
As preferably, described next frame comprises one or more subframe.
As preferably, the change of described at least one frame parameter also is applicable to one of them subframe.
As preferably, described frame parameter comprises the time cycle of one of them subframe.
As preferably, described frame parameter comprises loaded length.
As preferably, described frame parameter comprises concurrent interference transmission mode.
As preferably, described concurrent interference transmission mode is included in the pattern that only allows an equipment sending data in described a plurality of terminal equipment in the period of sub-frame.
As preferably, described concurrent interference transmission mode is included in the pattern that allows a few equipment sending data of selecting in described a plurality of terminal equipments in the period of sub-frame.
As preferably, described concurrent interference transmission mode is included in the pattern that can allow any equipment sending data in described a plurality of terminal equipment in the period of sub-frame.
According to an aspect of the present invention, provided a kind of terminal device circuitry of supporting that concurrent interference receives, described terminal device circuitry comprises:
Receiver circuit receives concurrent interference transmission;
With the treatment circuit that described receiver circuit communicates to connect, detect described concurrent interference transmission;
Described treatment circuit receives instruction is used for next frame with adjustment at least one frame parameter;
Described treatment circuit is used at least one frame parameter of next frame to respond described instruction by adjustment;
Described treatment circuit detects the data that come from the concurrent interference transmission that receives at next frame.
As preferably, described frame parameter comprises the time cycle of next frame.
As preferably, described frame parameter comprises concurrent interference transmission mode.
According to an aspect of the present invention, provided a kind of in wireless network architecture by transmitting the performed method of access point of a plurality of packets with a plurality of terminal equipments, described method comprises:
Initialization;
Establish a communications link with each terminal equipment;
Discern the performance of each terminal equipment;
Determine channel status; With
Adjust at least one frame parameter of next frame.
As preferably, described access point is notified in beacon period and is adjusted at least one frame parameter that is used for next frame.
As preferably, described channel status comprises the load on the access point.
As preferably, described load is decided by the quantity of a plurality of terminal equipments that participate in communication.
As preferably, described load is by the quality of service requirement decision of a plurality of terminal equipments relevant with described access point.
As preferably, described load is by the noise decision relevant with described access point.
As preferably, described load is by the interference decision relevant with described a plurality of terminal equipments.
By detailed description of the present invention hereinafter and with reference to the accompanying drawings, other characteristic and advantage of the present invention is tangible to those skilled in the art.
Description of drawings
Fig. 1 is WAP (wireless access point) according to the present invention is applicable to the frame parameter that the concurrent interference of frame transmits and receives based on the variation adjustment of channel status a functional flow diagram;
Fig. 2 is WAP (wireless access point) according to the present invention is applicable to the frame parameter that the concurrent interference of the part of frame transmits and receives based on the variation adjustment of channel status a functional flow diagram;
Fig. 3 is a schematic diagram of supporting the wireless network architecture of adjustment illustrated in figures 1 and 2, shows WAP (wireless access point), supports the equipment of single transmit and supports the equipment that concurrent interference is launched;
Fig. 4 is the block diagram according to the WAP (wireless access point) of the embodiment structure of Fig. 3;
Fig. 5 is the block diagram according to the wireless terminal of the embodiment structure of Fig. 3;
Fig. 6 be among the embodiment shown in Figure 1 during no contention and contention the typical sequential schematic diagram of single emission mode, the concurrent interference emission mode of part and complete concurrent interference emergence pattern;
Fig. 7 is the reception sequential schematic diagram of the concurrent interference emission mode of part shown in Figure 6 in no contention;
Fig. 8 is the reception sequential schematic diagram of the concurrent interference emission mode of part shown in Figure 6 in contention;
Fig. 9 utilizes the concurrent interference emission mode of single emission mode, part of subframe mode and the typical sequential schematic diagram of complete concurrent interference emission mode among the embodiment shown in Figure 2.
Embodiment
Fig. 1 is WAP (wireless access point) according to the present invention is applicable to the frame parameter that the concurrent interference of a frame transmits and receives based on the variation adjustment of channel status functional sequence Figure 105.In a wireless topology, frame parameter (below also refer to coding aggressive (coding aggressiveness)) has influenced the main aspect that concurrent interference transmits and receives, and promptly receiver is handled the ability of two or how concurrent transmission.Another aspect that the change frame parameter can have influence on is the variation of loaded length.Such receiver is the part of WAP (wireless access point), the also part of wireless terminal device under some situation.
Make WAP (wireless access point) can only handle an emission, two emissions or a plurality of emission by changing the coding aggressiveness, WAP (wireless access point) can be optimized the channel status that self performance changes with response dynamics, and these performances comprise the load based on bandwidth requirement, noise and interference.In other words, this WAP (wireless access point) is by the performance of consideration channel status and wireless terminal device and by selecting one of multiple possible emission or receiving mode to adjust the coding aggressiveness.This adjustment also comprises the adjustment loaded length.These patterns comprise single emission mode, the concurrent interference emission mode of a plurality of part (that is, the concurrent interference emission mode of part a is to n) and complete concurrent interference emission mode.In a beacon period, broadcasted application is in the model selection of next frame in wireless network architecture for WAP (wireless access point), and wireless terminal device is then prepared their frame traffic in view of the above.
In the single emission mode of tradition (legacy), WAP (wireless access point) is once only considered an emission, and other emission all is considered as disturbing.In single emission mode, the coding aggressiveness is minimum, and therefore relevant with coding expense is minimum.This pattern for example is appropriate to the situation that all relevant wireless terminal devices are only supported the load minimum of the situation of single sending mode or WAP (wireless access point).Any such pattern that is applicable to frame is notified wireless terminal device in the beacon period before the payload segment of frame.Described frame comprises no contention and contention.In no contention, wireless terminal device waits for that a short interFrameGap (SIFS) then begins to send.Similarly, send data to any one wireless terminal device in the no contention of this WAP (wireless access point) after the SIFS interval.In contention, wireless terminal device or WAP (wireless access point) send a request earlier and send (RTS) signal, just begin to send data after obtaining recipient's clear to send (CTS) signal.After finishing the data transmission, wireless terminal device or WAP (wireless access point) confirmation of receipt (ACK) signal are received by the other side to confirm data.Any contention that is caused by a plurality of equipment can solve according to the mode of agreement based on arbitration.
Based on the quantity of relevant device and their performance, channel status with the relevant expense of the concurrent interference launching code of part, WAP (wireless access point) determines a concurrent interference emission mode of suitable part from the concurrent interference emission mode of part a to n.The concurrent interference emission mode of determining of any part is to optimum performance can be provided under the stable condition.The sequential chart that is applicable to one of concurrent interference emission mode of a plurality of parts is described with reference to figure 6.The example of the sequential chart of the data transmission in contention and no contention under the concurrent interference emission mode of part as shown in Figure 7 and Figure 8.
For example, WAP (wireless access point) can be installed in the airport and can provide service for a plurality of mobile radio terminal devices.This mobile radio terminal device can be notebook computer or a handheld computing device of waiting for the passenger of flight time utilization WAP (wireless access point) service.Because flight arrival was different with the time of leaving in one day and utilizes the passenger's of WAP (wireless access point) service quantity also is inscrutable, so the intraday load of WAP (wireless access point) is uneven.WAP (wireless access point) is periodically assessed channel status and is determined to use the quantity of wireless terminal device of service and their performance in this case, and further assesses interference and noise under the airport environment.By considering all of these factors taken together, the concurrent interference emission mode of suitable part of wireless access point selection and notify described a plurality of notebook computer or handheld computing device as the emission mode of next frame.
In no contention, the concurrent interference emission mode of part, i.e. pattern a can comprise that the notebook computer that allows selected quantity or handheld computing device launch or receive.WAP (wireless access point) can be handled the notebook computer that is received from selected quantity or the arbitrary signal of handheld computing device.For example, one of these a plurality of notebook computers or handheld computing device can determine that this is a no contention, identify the quantity of the equipment that utilizes the WAP (wireless access point) service and can begin to launch data based on SIFS.In contention, notebook computer or handheld computing device need send RTS and begin to launch data based on the CTS that comes from WAP (wireless access point) that receives.After the transmission of finishing data, notebook computer or handheld computing device receive ack signal from WAP (wireless access point).In addition, complete concurrent interference emission mode can not forced any restriction to wireless terminal device, allows any amount of wireless terminal device emission data.
Reference flowchart Figure 105, the function of WAP (wireless access point) starts from step 111, and access point begins initialization by initial assessment is carried out in the sub-district.This initial assessment comprises that identification wants to attempt to be linked into the quantity of the wireless terminal device of the backbone network that this WAP (wireless access point) is connected to.In addition, WAP (wireless access point) is inquired about each wireless terminal device to understand the bandwidth use and the Idle state of its performance, QoS requirement, expectation.As the part of initial assessment, WAP (wireless access point) is also searched for issuable any noise and interference in this sub-district.The performance of these a plurality of wireless terminal devices comprise singlely transmit and receive performance, concurrent interference transmits and receives performance or the both possesses.In addition, WAP (wireless access point) can also verify whether wireless terminal device has multiband and transmit and receive performance.
At next procedure 113, WAP (wireless access point) in beacon period, set up with wireless terminal device between communicate by letter.In the periodic evaluation process, this access point can be attempted communicating by letter with the new wireless terminal device foundation that just enters into this sub-district.At next procedure 115, WAP (wireless access point) identification newly enters into the performance of the wireless terminal device of sub-district.These performances comprise and singlely transmit and receive performance or concurrent interference transmits and receives performance.At next procedure 117, based on priority and service quality, WAP (wireless access point) is assessed the bandwidth demand of each wireless terminal device.This comprises that each wireless terminal device of inquiry is to understand its quality of service requirement, to estimate bandwidth use and Idle state.At next procedure 119, WAP (wireless access point) is surveyed interference and the noise in this sub-district.
At next procedure 121, WAP (wireless access point) is carried out to calculate with decision and the pattern of optimal performance can be provided and select this pattern to communicate.In conjunction with periodic evaluation, WAP (wireless access point) can also utilize trigger condition to select one of communication pattern.This trigger condition can be new noise or interference, the entering suddenly of perhaps a plurality of new wireless terminal devices.These patterns are expressed as the incident step in the drawings, for example single emission mode 131, the concurrent interference emission mode of part a 133, the concurrent interference emission mode of part n 135 and complete concurrent interference emission mode 137.In the practice, concurrent interference emission mode a and n may be to the wider scope of n than a shown in the figure.In case chosen a kind of pattern, in next procedure 141, WAP (wireless access point) is by this pattern of broadcast announcement wireless terminal device.From the angle of WAP (wireless access point), may be different to the consideration that transmits and receives, therefore also need to be notified to wireless terminal device.
To be WAP (wireless access point) according to the present invention can be adapted to the functional flow diagram of the frame parameter that the concurrent interference of the part of frame transmits and receives based on the variation adjustment of channel status to Fig. 2.Under this mode, WAP (wireless access point) is divided into no contention and contention to a frame, and further be divided into subframe, and these subframes all are based on a kind of pattern work.One of them adjusts the coding aggressiveness to WAP (wireless access point) by the performance of consideration channel status and wireless terminal device and by selecting single emission mode, the concurrent interference emission mode of a plurality of part and complete concurrent interference emission mode.WAP (wireless access point) is broadcasted the model selection that is applicable to each subframe in beacon period, wireless terminal device is then prepared their frame traffic in view of the above.
Use the functional sequence of the WAP (wireless access point) of the manner to start from step 211, access point is by carrying out initial assessment with the beginning initialization to the sub-district.This initial assessment comprises that identification wants to attempt to be linked into the quantity of the wireless terminal device of backbone network.In addition, as an initialized part, WAP (wireless access point) is inquired about each wireless terminal device to understand its performance, QoS requirement, the use of expectation bandwidth and Idle state.As an initialized part, WAP (wireless access point) is also searched for any noise and interference that may reduce emission effciency.The performance of these a plurality of wireless terminal devices comprises that the single performance, concurrent interference of transmitting and receiving transmits and receives performance or two kinds and all possess.In addition, WAP (wireless access point) can verify also whether wireless terminal device has multiband and transmit and receive performance.
At next procedure 213, WAP (wireless access point) in beacon period, set up with wireless terminal device between communicate by letter.In the preiodic type evaluation process, this access point can be attempted the wireless terminal device foundation new with just entering into the sub-district and communicate by letter.At next procedure 215, WAP (wireless access point) identification newly enters into the performance of the wireless terminal device of sub-district.These performances can comprise and singlely transmit and receive performance or concurrent interference transmits and receives performance.At next procedure 217, by inquiring about each wireless terminal device understanding its quality of service requirement, to estimate that bandwidth uses and Idle state, and based on priority and service quality, WAP (wireless access point) is assessed the bandwidth demand of each wireless terminal device.At next procedure 219, WAP (wireless access point) is surveyed interference and the noise in this sub-district.
At next procedure 221, WAP (wireless access point) is carried out to calculate with decision and the pattern of optimal performance can be provided and select this pattern to communicate.Then, WAP (wireless access point) is divided into a frame a plurality of subframes and selects a kind of communication pattern for each subframe.These patterns are expressed as the incident step in the drawings, for example single emission mode 231, the concurrent interference emission mode of part a 233, the concurrent interference emission mode of part n 235 and complete concurrent interference emission mode 237.In the practice, concurrent interference emission mode a and n may be to the wider scope of n than a shown in the figure.In case for each subframe has been chosen pattern, at next procedure 241, WAP (wireless access point) is notified to wireless terminal device by broadcasting with the pattern of selecting.From the angle of WAP (wireless access point), may be different to the consideration that transmits and receives, therefore also need to be notified to wireless terminal device.
Fig. 3 is the schematic block diagram of wireless network architecture 305, and this wireless network architecture is supported adjustment illustrated in figures 1 and 2, wherein shows WAP (wireless access point) 307, supports the equipment 369 of single emission and supports the equipment 379 that concurrent interference is launched.Although in a sub-district, has the equipment of the single emission of a plurality of supports and support the equipment that concurrent interference is launched, thereby the quantity of equipment is time to time change, causes the channel status dynamic change, only provides an example of each type among the figure.Other factor that influences the channel status dynamic change comprises to the service quality of each equipment 369 and 379, the service priority that provides interference and the noise in the networking telephone (VoIP), Idle state, the sub-district for example.Can be according to WAP (wireless access point) 307 of the present invention by adjusting concurrent interference frame parameter to respond the channel status of these dynamic changes.The factor that these frame parameters are represented comprises that coding is aggressive, i.e. the quantity and the loaded length of (perhaps, in the part in a frame period) manageable concurrent interference transmission in a frame period.Be in course of adjustment, can take into account automatically with the expense that the increase of coding aggressive increase and loaded length brings, with the efficient of optimization WAP (wireless access point) 307.
Under complete framing control mode, WAP (wireless access point) 307 distributes the no contention of a part for example only to have the terminal equipment 369 (not providing among the figure) of single emission transceiver circuit for the terminal equipment of supporting single emission.In this cycle, WAP (wireless access point) 307 and not execution concurrence interference emission or receptions of the wireless terminal device with concurrent interference radiating circuit.Similarly, in contention, based on coming from the contention of wireless terminal device in a plurality of independently time portion in this cycle and arbitrating, WAP (wireless access point) 307 provides route for the equipment of all single emissions of support.Support the equipment 379 of concurrent interference emission to possess single transceiver circuit, concurrent interference transceiver circuit (described) with reference to figure 5.These transceivers can be carried out single transmit and receive and concurrent interference transmits and receives.WAP (wireless access point) 307 distributes the second portion of no contention to give the terminal equipment that not only has single transceiver circuit but also have concurrent interference transceiver circuit, so that transmit and receive according to the single or concurrent interference of channel status execution.In addition, in contention, WAP (wireless access point) 307 is based on the contention and the arbitration that come from wireless terminal device in a plurality of independently time portion in this cycle, for these a plurality of wireless terminal devices of supporting concurrent interference emission provide route.Each frame can be applicable to one of a plurality of possibility emission modes, for example single emission mode, the concurrent interference emission mode of a plurality of part (that is, the concurrent interference emission mode of part a is to n) and complete concurrent interference emission mode.Similarly, be in course of adjustment, loaded length is controlled.
Under another adjustment mode, WAP (wireless access point) 307 all is divided into predetermined a plurality of subframe to no contention and contention, and make each subframe be applicable to single emission mode, the concurrent interference emission mode of a plurality of part or complete concurrent interference emission mode one of them.Based on channel status, can control the cycle and the loaded length of each subframe, with optimization WAP (wireless access point) 307 efficient.
The beacon signal that master controller 313 produces is being controlled the each side that transmits and receives, and for example emission mode, no contention insert and the contention arbitration.All relevant wireless device listens are also prepared corresponding communication separately in view of the above by the beacon signal that WAP (wireless access point) 307 produces.By uplink transmitter 309, bridgt circuit (as shown in Figure 4) provides the ability that is bridged to other WAP (wireless access point) and is bridged to internet (or other backbone network) 351 for WAP (wireless access point) 307.WAP (wireless access point) 307 and the wireless terminal device of supporting concurrent interference emission for example 379 can have a plurality of antennas for example 331 and a plurality of tuner, therefore can communicate by letter on a plurality of wireless channels.
Fig. 4 is the block diagram 405 according to the WAP (wireless access point) 409 of embodiment structure shown in Figure 3.Circuit 495 can be represented any WAP (wireless access point) that can the route transmission packet.Wireless access dot circuit 495 mainly comprises central processing circuit 409, local storage 411, user interface 413, uplink transmitter circuit 421, bridgt circuit 425, downlink wireless transceiver circuit 427 and main line control circuit 481 down.These parts interconnect by directly or in the indirect communication path one or more of system bus, dedicated communication path or other.In each embodiment, central processing circuit 409 can be microprocessor, digital signal processor, state machine, application-specific integrated circuit (ASIC), field programmable gate array or other treatment circuit.In addition, in each embodiment, main line control circuit 481 down can be control card or comprise microcontroller or the part of the WAP (wireless access point) card of microprocessor.
Local storage 411 can be the memory of random asccess memory, read-only memory, flash memory, disc driver, CD-ROM driver or other type of energy storage computation machine instruction and data.Local storage 411 includes component software (not providing), in the equipment of the equipment of supporting single emission and the concurrent interference emission of support, all is used to handle the data that receive.These component softwares utilize Digital Signal Processing (information processing) technology to insert with the concurrent interference that the terminal equipment that the concurrent interference of a plurality of supports is launched is provided, and can also handle a plurality of concurrent interference receptions under the concurrent interference emission mode of part and under the complete concurrent interference emission mode.This component software comprises single emission detection algorithm, the single emission algorithm of the data that can assist process receive from the equipment of supporting single emission, and the concurrent interference emission detection algorithm and the concurrent interference emission algorithm of the data that can assist process receive from the equipment of supporting concurrent interference emission.
About in contention and no contention, carrying out the decision of single emission and concurrent interference radiating portion, in beacon period, send to the equipment of supporting single emission and the equipment of supporting concurrent interference emission by main line control circuit 481 down.In this beacon period, main line control circuit 481 down is in the mode of full frame or in the mode of subframe, will be notified to relevant equipment about cycle, pattern and the loaded length of each part of frame or frame.Based on quantity, bandwidth use, QOS demand (service quality), service priority and the Idle state of expectation, the overlapping interference in sub-district, the far and near interference and noise of relevant wireless terminal device in the sub-district, main descending controller circuitry 481 can determine the time cycle of these parts.Beacon signal is being controlled the each side of wireless terminal device, comprises that emission mode, no contention insert and the contention arbitration.The wireless device listens beacon signal that all are relevant is also prepared corresponding communication separately in view of the above.The terminal equipment performance information 491 of storage assists main line control circuit 481 down to make the decision that adjusts accordingly about the variation according to channel status.In addition, main line control circuit 481 down includes controller storage 483.Controller storage 481 comprises program code, and for example environmental assessment and pattern determine that code 485 and single and concurrent interference transceiver mode adjust code 487, they can assist line control circuit 481 definite current channel statuss under the master in initialization procedure or periodic evaluation process, and adjust the pattern of downlink wireless transceiver circuit 427 in view of the above.
Downlink wireless transceiver circuit 427 has self adaptation transmitter 429 and adaptive receiver 431 to handle physical layer protocol.Downlink wireless transceiver circuit 427 can be carried out single transmit and receive and concurrent interference transmits and receives.Downlink wireless transceiver circuit 427 is connected to a plurality of antennas 437, and these antenna can help to communicate by letter in many radio-frequency channels and wideer bandwidth.In one embodiment, the software information processing components of mentioning with regard to local storage 411 more than can be stored in the downlink wireless transceiver circuit 427 to reach the purpose of accelerating processing.
By uplink transmitter 421, bridgt circuit 425 can allow WAP (wireless access point) 495 to be bridged to other WAP (wireless access point) and be bridged to backbone network.Uplink transmitter circuit 421 comprises wired and the wireless, packet-switched interface, for WAP (wireless access point) provides for example ability of internet of backbone network that is connected to, this uplink transmitter circuit 421 is also connected to a plurality of antennas 435 and is connected to the circuit 433 that communicates to connect with backbone network.In some other embodiment, access point circuit 495 of the present invention may comprise than among the figure still less or more parts and still less or more function.In other words, the wireless device shown in the figure only is an example according to possibility function of the present invention and framework.
Fig. 5 is the block diagram 505 according to the wireless terminal device 507 of the embodiment structure of Fig. 3.Circuit 507 can be represented any wireless terminal device, and as the transmitting terminal of packet or the receiving terminal of packet, it can also represent the wireless terminal device of the concurrent interference emission of any support as shown in Figure 3.Wireless terminal device 507 mainly comprises central processing circuit 511, local storage 513, user interface 509, radio transceiver circuitry 559 and communication interface 525.These parts interconnect by directly or in the indirect communication path one or more of system bus, dedicated communication path or other.
In each embodiment, central processing circuit 511 can be microprocessor, digital signal processor, state machine, application-specific integrated circuit (ASIC), field programmable gate array or other treatment circuit.In addition, in each embodiment, radio transceiver circuitry 559 can be made up of the local controller circuit 561 that comprises microcontroller or microprocessor.Local storage 513 can be random asccess memory, read-only memory, flash memory, disc driver, CD-ROM driver or other type memory of energy storage computation machine instruction and data.Local storage 513 includes device operating system and application software 517 and single and concurrent interference transceiver mode and adjusts code 515.Communication interface 525 allows wireless terminal device 507 to be connected with radio transceiver circuitry 559.
Radio transceiver circuitry 559 comprises local controller circuit 561.Local controller circuit 561 is by managing the controlled function of radio transceiver circuitry 559 in one of them mode of preparing to communicate by letter of single emission mode, the concurrent interference emission mode of a plurality of part and complete concurrent interference emission mode during the part of any one given frame or frame.Local controller circuit 561 is monitored control signal and is added in the adjusted frame characteristic in beacon period.The controlled function of radio transceiver circuitry 559 comprises generation radio performance information and send it to WAP (wireless access point) in beacon period, and receives this control signal and information extraction and prepare corresponding communication in view of the above from corresponding WAP (wireless access point).Radio transceiver circuitry 559 also is equipped with self adaptation transmitter 565 and adaptive receiver 567.Radio transceiver circuitry 559 can be carried out single transmitting and receiving, and can the execution concurrence interference transmit and receive again.
Fig. 6 be embodiment illustrated in fig. 1 in no contention and contention the typical sequential schematic diagram 605 of single emission mode, the concurrent interference emission mode of part and complete concurrent interference emergence pattern.As shown in the figure, a frame comprises beacon period, no contention transmission cycle and contention.Under full frame adjustment mode (605, Fig. 7 and Fig. 8), the adjustment of frame realizes to the time cycle of one of n (reference frame B) and complete concurrent interference emission mode (reference frame C) by changing single emission mode (reference frame A), the concurrent interference emission mode of part a.This not only is applicable to no contention but also is applicable to contention, though be under the single emission mode or the concurrent emission mode of part under.Described with reference to figure 7 and Fig. 8, loaded length also is to change adjustment according to channel status.
Channel status by the quantity of wireless terminal device relevant in the sub-district, they function, estimate that bandwidth uses, QOS demand (service quality), service priority and Idle state, the overlapping interference in sub-district, far and near interference and noise are determined.Under single emission mode, no contention time 611 and contention time 613 is respective change according to channel status, with the performance of optimization WAP (wireless access point).Similarly, at the concurrent interference emission mode of part n, no contention time 621 and contention time 623 is respective change according to channel status.The concurrent interference emission mode of part allows the wireless terminal device of limited quantity side by side to launch or receives data, and the generation of this situation is in contention and arbitration in emission or reception free time and the contention based on channel in the no contention.Under the situation of complete concurrent interference emission mode, emission changes according to channel status cycle time 631.Under the situation of complete concurrent interference emission mode, to transmitting and receiving of WAP (wireless access point) without any restriction.
In no contention and two kinds of situations of contention, beacon signal is used to determine under the various patterns access to WAP (wireless access point), and sends to the equipment of supporting single emission and support the equipment of concurrent interference emission in beacon period.Access module comprises that single emission mode, the concurrent interference emission mode of part a are to n and complete concurrent interference emission mode.Under any pattern, provide the decision of access and performance that access period depends on wireless terminal device and WAP (wireless access point) performance to consider.Beacon signal is being controlled the each side of terminal equipment, comprises that specifically emission mode, no contention insert and the contention arbitration.The wireless terminal device respond beacon signal that all are relevant is also prepared their corresponding communication separately in view of the above.
Fig. 7 is the reception sequential schematic diagram 705 in the no contention of the concurrent interference emission mode of part shown in Figure 6.This figure has provided the frame B among Fig. 6, and in no contention, a concurrent jamming pattern of part (being pattern n) is adjusted.Give two wireless terminal devices among the figure, promptly wireless device X and need not equipment Y transmit data to WAP (wireless access point) concomitantly.
As shown in the figure, beacon period is before no contention.Be used to determine do not have various modes in the contention down to the emission of WAP (wireless access point) with from the beacon signal of the reception of WAP (wireless access point), in beacon period, be transmitted to the equipment of supporting single emission and support the equipment of concurrent interference emission.Decision about the concurrent interference emission mode of part n was sent out in this beacon period, and this decision depends primarily on the performance and the channel status of wireless device.Beacon signal is being controlled the each side of wireless terminal device, comprises that specifically emission mode, no contention insert and the contention arbitration.The wireless terminal device respond beacon signal that all are relevant is also prepared their corresponding communication separately in view of the above.After beacon period, no contention begins, and provides the part of frame B to be used for the equipment that a few supports concurrent interference emission function.
As shown in the figure, under the concurrent interference emission mode of part n, support the equipment X and the Y (for example 379 among Fig. 3) of concurrent interference emission, detect SIFS cycle of channel idle, just transmit data to access point simultaneously.As shown in the figure, the transfer of data of being initiated by the wireless device of supporting concurrent interference emission is based on the affirmation afterwards of transmission data.Similarly consideration also is applicable to from access point and transmit data to the equipment of supporting concurrent interference emission.
Fig. 8 is the reception sequential schematic diagram 805 in the contention of the concurrent interference emission mode of part shown in Figure 6.This figure has provided the frame B among Fig. 6, and in this contention, a concurrent jamming pattern of part (being pattern n) is adjusted.Give two wireless terminal devices among the figure, promptly wireless device X and need not equipment Z transmit data to WAP (wireless access point) concomitantly.Decision and contention about the concurrent interference emission mode of part n sent in this beacon period, and this decision depends primarily on the performance and the channel status of wireless device.
After beacon period and no contention, contention begins, and provides the part of frame B to be used for the equipment that a few supports concurrent interference emission based on contention.In contention, support the equipment (for example wireless device X and Y) of concurrent interference emission to detect distributed inter-frame space (DIFS) and launch the RTS signal.After SIFS, WAP (wireless access point) responds by sending cts signal.Again, after SIFS, support the wireless terminal device emission data of concurrent interference emission and receive ACK.
Fig. 9 utilizes the concurrent interference of single emission mode, part of subframe mode and the typical sequential schematic diagram 905 of complete concurrent interference emission mode in embodiment illustrated in fig. 2.The frame that provides among the figure (frame A) comprises beacon period, no contention transmission cycle and contention.Under this adjustment mode, frame A adjusted by the time cycle that oneself is divided into a plurality of subframes and changes subframe.This mode both had been applicable to that no contention also was applicable to contention under single emission mode and the concurrent interference emission mode of part.Loaded length also changes according to channel status.Provide no contention among the figure, comprised subframe for example ST (single emission) pattern 911, PCIT (the concurrent interference emission of part) pattern a 913, PCIT pattern b 915, PCIT pattern n 917 and complete concurrent interference emission mode 919.Similarly, contention comprises subframe for example PCIT pattern b 931, PCIT pattern n 933, complete concurrent interference emission mode 935, PCIT pattern a 937 and ST pattern 939.
Pattern, mode time cycle and load length all change according to channel status.Channel status by the quantity of wireless terminal device relevant in the sub-district, they performance, estimate that bandwidth uses, QOS demand (service quality), service priority and Idle state, the overlapping interference in sub-district, far and near interference and noise are determined.
WAP (wireless access point) determines to be applicable to the emission mode of each subframe in no contention and contention, and in beacon period these pattern informations is sent to the equipment of supporting single emission and support the equipment that concurrent interference is launched.Access module comprises that single emission mode, the concurrent interference emission mode of part a are to n and complete concurrent interference emission mode.The model selection of each subframe and cycle turn-on time are depended on the performance and the consideration of WAP (wireless access point) performance of wireless access point device.
The phrase that uses among the application " circuit " and " Circuits System " can be an independent circuit or a part of carrying out the multifunctional circuit of a plurality of basic functions.For example, based on embodiment, treatment circuit can be realized with single-chip processor or a plurality of processor chips.Similarly, among the embodiment, first circuit and second circuit can be combined to form a circuit or, in another embodiment, perhaps independently independently operating on the chip.The phrase that uses among the application " chip " refers to integrated circuit." circuit " and " Circuits System " can comprise the hardware of general or special-purpose, perhaps can comprise such hardware and relevant software for example firmware or object code.
Those of ordinary skills as can be known, among the application employed phrase " communicate to connect " comprise wired and wireless, directly be connected and be connected by the indirect of other assembly, element or module.Those of ordinary skills infer connection (promptly inferring parts connects with another parts) and comprise wireless with wired, direct with indirect being connected identical with " communicating to connect " mode between two parts also as can be known.
The present invention is by having showed specific function of the present invention and relation thereof by method step.The scope of described method step and order are to define arbitrarily for convenience of description.As long as can carry out specific function and order, also can use other boundary and order.Therefore any boundary or order described or choosing fall into scope and spirit essence of the present invention.
The present invention also is described some important function by functional module.The boundary of described functional module and the relation of various functional modules are to define arbitrarily for convenience of description.As long as can carry out specific function, also can use other boundary or relation.Therefore described other boundary or relation also falls into scope and spirit essence of the present invention.
Those of ordinary skills also as can be known, the functional module among the application and other displaying property module and assembly can be embodied as the processor and the aforesaid combination in any of discrete component, application-specific integrated circuit (ASIC), the appropriate software of execution.
In addition, although more than be the description of the present invention being carried out by some embodiment, those skilled in the art know that the present invention is not limited to these embodiment, under the situation that does not break away from the spirit and scope of the present invention, can carry out various changes or equivalence replacement to these features and embodiment.Protection scope of the present invention is only limited by claims of the application.
Claims (10)
1. access point circuit of supporting a plurality of terminal equipments is characterized in that described access point circuit comprises:
In present frame, receive the receiver circuit of the concurrent interference transmission that comes from a plurality of terminal equipments;
With the treatment circuit that described receiver circuit communicates to connect, be used to detect described concurrent interference transmission;
The transmitter circuitry that communicates to connect with described treatment circuit;
Described treatment circuit produces the instruction in order at least one frame parameter that changes next frame based on the variation of channel status;
Described treatment circuit is sent in described a plurality of terminal equipment at least one to described instruction by transmitter circuitry, can adapt to the variation of described channel status with at least one frame parameter in described next frame; With
Described treatment circuit detects the concurrent interference transmission that comes from described a plurality of terminal equipments that receives in described next frame.
2. access point circuit according to claim 1 is characterized in that, described treatment circuit transmits described instruction so that at least one frame parameter can adapt to described channel state variations when next frame begins.
3. access point circuit according to claim 2 is characterized in that described next frame comprises one or more subframe.
4. access point circuit according to claim 2 is characterized in that the change of described at least one frame parameter also is applicable to one of them subframe.
5. access point circuit according to claim 4 is characterized in that described frame parameter comprises the time cycle of one of them subframe.
6. terminal device circuitry of supporting that concurrent interference receives is characterized in that described terminal device circuitry comprises:
Receiver circuit receives concurrent interference transmission;
With the treatment circuit that described receiver circuit communicates to connect, detect described concurrent interference transmission;
Described treatment circuit receives instruction is used for next frame with adjustment at least one frame parameter;
Described treatment circuit is used at least one frame parameter of next frame to respond described instruction by adjustment;
Described treatment circuit detects the data that come from the concurrent interference transmission that receives at next frame.
7. terminal device circuitry according to claim 6 is characterized in that described frame parameter comprises the time cycle of next frame.
8. terminal device circuitry according to claim 6 is characterized in that, described frame parameter comprises concurrent interference emission mode.
One kind in wireless network architecture by transmitting the performed method of access point of a plurality of packets with a plurality of terminal equipments, it is characterized in that described method comprises:
Initialization;
Establish a communications link with each terminal equipment;
Discern the performance of each terminal equipment;
Determine channel status; With
Adjust at least one frame parameter of next frame.
10. method according to claim 9 is characterized in that, described access point is notified in beacon period and adjusted at least one frame parameter that is used for next frame.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/595,346 | 2006-11-09 | ||
| US11/641,198 | 2006-12-18 | ||
| US11/641,198 US20080112375A1 (en) | 2006-11-09 | 2006-12-18 | Wireless network that adapts concurrent interfering transmission parameters based on channel conditions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101207541A true CN101207541A (en) | 2008-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101694429A Pending CN101207541A (en) | 2006-11-09 | 2007-11-08 | Access point circuit for supporting multi-terminal devices and method thereof |
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| CN (1) | CN101207541A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101808018A (en) * | 2010-03-26 | 2010-08-18 | 杭州华三通信技术有限公司 | Method and device for detecting quantity of access terminals |
| WO2012130072A1 (en) * | 2011-03-25 | 2012-10-04 | 北京新岸线无线技术有限公司 | Wireless communication system, network device, and terminal device |
| WO2013044851A1 (en) * | 2011-09-30 | 2013-04-04 | 歌尔声学股份有限公司 | Wireless digital communication method and system |
| CN101753366B (en) * | 2008-12-01 | 2013-04-17 | 华为技术有限公司 | Method, equipment and system for realizing stream statistics of virtual private network |
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2007
- 2007-11-08 CN CNA2007101694429A patent/CN101207541A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101753366B (en) * | 2008-12-01 | 2013-04-17 | 华为技术有限公司 | Method, equipment and system for realizing stream statistics of virtual private network |
| CN101808018A (en) * | 2010-03-26 | 2010-08-18 | 杭州华三通信技术有限公司 | Method and device for detecting quantity of access terminals |
| CN101808018B (en) * | 2010-03-26 | 2012-10-17 | 杭州华三通信技术有限公司 | Method and device for detecting quantity of access terminals |
| WO2012130072A1 (en) * | 2011-03-25 | 2012-10-04 | 北京新岸线无线技术有限公司 | Wireless communication system, network device, and terminal device |
| US9515795B2 (en) | 2011-03-25 | 2016-12-06 | Nufront Mobile Communications Technology Co., Ltd. | Wireless communication system, network device, and terminal device |
| WO2013044851A1 (en) * | 2011-09-30 | 2013-04-04 | 歌尔声学股份有限公司 | Wireless digital communication method and system |
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