CN102868485B - The method and apparatus of Response to selection frame modulating-coding group MCS in radio communication - Google Patents

Abstract

The present invention relates in unique user, multi-user, multiple access and/or mimo wireless communication, carry out Response to selection frame modulating-coding group (MCS).And compared with any exchange carried out between the communicator with response frame, the first frame (such as, triggered frame) is first from causing communicator to be sent to responding communication device, and the second frame (such as, response frame) is sent to initiation communicator from responding communication device.Can explicitly or implicitly determine the MCS suitably selecting to use in response frame.One or more parameters (such as, limiting parameter, reduction parameter etc.) can be used for determining the MCS of response frame.Can selecting to be used for the MCS of response frame from basic MCS group, basic MCS group guarantees all response frames causing communicator can suitably receive any responding communication device.

Description

The method and apparatus of Response to selection frame modulating-coding group MCS in radio communication

The cross reference of related application

This application claims the U.S. Provisional Application US61/505 submitted on July 6th, 2011, the U. S. application US13/524 that on June 15th, 504 and 2012 submits to, the priority of 888, its full content is incorporated herein by and constitutes the part of the application.

It is incorporated by

The full text of following ieee standard/draft IEEE Standard is incorporated herein by reference, and constitutes a part for this U. S utility patent application all sidedly:

1.IEEEStd802.11^TM2012, " IEEEStandardforInformationtechnology Telecommunicationsandinformationexchangebetweensystems Localandmetropolitanareanetworks Specificrequirements；Part11:WirelessLANMediumAccessControl (MAC) andPhysicalLayer (PHY) Specifications; " IEEEComputerSociety, supported by LAN/MANStandardsCommittee, IEEEStd802.11^TM-2012 (revised edition of IEEEStd802.11-2007), altogether 2793 pages (incl.pp.i-xcvi, 1-2695).

2.IEEEStd802.11n^TM2012, " IEEEStandardforInformationtechnology Telecommunicationsandinformationexchangebetweensystems Localandmetropolitanareanetworks Specificrequirements；Part11:WirelessLANMediumAccessControl (MAC) andPhysicalLayer (PHY) Specifications；Amendment5:EnhancementsforHigherThroughput, " IEEEComputerSociety, IEEEStd802.11n^TM-2009(IEEEStd802.11^TMThe revised edition of-2007, by IEEEStd802.11k^TM–2008,IEEEStd802.11r^TM–2008,IEEEStd802.11y^TM2008 and IEEEStd802.11r^TM2009 revisions), 536 pages (incl.pp.i-xxxii, 1-502) altogether.

3.IEEEDraftP802.11-REVmb^TM/ D12, in November, 2011 (IEEEStd802.11^TMThe revised edition of-2007, by EEEStd802.11k^TM-2008,IEEEStd802.11r^TM-2008,IEEEStd802.11y^TM-2008,IEEEStd802.11w^TM-2009,IEEEStd802.11n^TM-2009,IEEEStd802.11p^TM-2010,IEEEStd802.11z^TM-2010,IEEEStd802.11v^TM-2011,IEEEStd802.11u^TM-2011 and IEEEStd802.11s^TM-2011 revisions), " IEEEStandardforInformationtechnology Telecommunicationsandinformationexchangebetweensystems Localandmetropolitanareanetworks Specificrequirements；Part11:WirelessLANMediumAccessControl (MAC) andPhysicalLayer (PHY) Specifications; " drafted by 802.11WorkingGroupoftheLAN/MANStandardsCommitteeoftheIEE EComputerSociety, 2910 pages ((incl.pp.i-cxxviii, 1-2782) altogether.

4.IEEEP802.11ac^TM/ D2.1, in March, 2012, " DraftSTANDARDforInformationTechnology Telecommunicationsandinformationexchangebetweensystems Localandmetropolitanareanetworks Specificrequirements, Part11:WirelessLANMediumAccessControl (MAC) andPhysicalLayer (PHY) specifications, Amendment4:EnhancementsforVeryHighThroughputforOperation inBandsbelow6GHz, " drafted by 802.11WorkingGroupofthe802Committee, 363 pages of (incl.pp.i-xxv altogether, 1-338).

5.IEEEP802.11ad^TM/ D6.0, in March, 2012, (according to the IEEEP802.11REVmbD12.0 draft for amendments carried out), (revised edition of IEEEP802.11REVmbD12.0, revised by IEEE802.11aeD8.0 and IEEE802.11aaD9.0), " IEEEP802.11ad^TM/ D6.0DraftStandardforInformationTechnology TelecommunicationsandInformationExchangeBetweenSystems LocalandMetropolitanAreaNetworks SpecificRequirements Part11:WirelessLANMediumAccessControl (MAC) andPhysicalLayer (PHY) Specifications Amendment3:EnhancementsforVeryHighThroughputinthe60GHzBa nd, " sponsor: IEEE802.11CommitteeoftheIEEEComputerSociety, IEEE-SAStandardsBoard, 664 pages altogether.

6.IEEEStd802.11ae^TM2012, " IEEEStandardforInformationtechnology Telecommunicationsandinformationexchangebetweensystems Localandmetropolitanareanetworks Specificrequirements；Part11:WirelessLANMediumAccessControl (MAC) andPhysicalLayer (PHY) Specifications; " " revision 1:PrioritizationofManagementFrames; " IEEEComputerSociety, supported by LAN/MANStandardsCommittee, IEEEStd802.11ae^TM-2012, (IEEEStd802.11^TMThe revised edition of-2012), 52 pages (incl.pp.i-xii, 1-38) altogether.

7.IEEEP802.11af^TM/ D1.06, in March, 2012, (IEEEStd802.11REVmb^TMThe revised edition of/D12.0, by IEEEStd802.11ae^TM/D8.0,IEEEStd802.11aa^TM/D9.0,IEEEStd802.11ad^TM/ D5.0 and IEEEStd802.11ac^TM/ D2.0 revises), " DraftStandardforInformationTechnology Telecommunicationsandinformationexchangebetweensystems Localandmetropolitanareanetworks Specificrequirements Part11:WirelessLANMediumAccessControl (MAC) andPhysicalLayer (PHY) Specifications Amendment5:TVWhiteSpacesOperation, " drafted by 802.11WorkingGroupoftheIEEE802Committee, 140 pages of (incl.pp.i-xxii altogether, 1-118).

Technical field

The present invention relates generally to communication system；More particularly, it relates to select modulating-coding group (MCS) and the various communicators of operation use in this communication system relevant messaging parameter.

Background technology

Known communication system is for supporting the wireless and wire communication between wireless and/or wire communication device.The scope of this communication system is from the whole nation and/or international cell telephone system to the Internet, then to point-to-point home wireless network.Constituting various communication system, therefore, these communication systems are operated according to one or more communication standards.Such as, wireless communication system can be operated according to one or more standards, include but not limited to, IEEE802.11x, bluetooth, Advanced Mobile Phone Service (AMPS), numeral AMPS, global system for mobile communications (GSM), CDMA (CDMA), local multipoint distributed system (LMDS), multichannel multiple spot distributed service (MMDS) and/or its variant.

Type according to wireless communication system, radio communication device, for instance cell phone, two-way radio, personal digital assistant (PDA), PC (PC), laptop computer, home entertainment device etc. directly or indirectly communicate with other radio communication devices.For directly communication (also referred to as point-to-point communication), its receptor and transmitter are adjusted same or multiple channel (such as by the radio communication device participated in, in multiple radio frequencies (RF) carrier wave of wireless communication system one) in, and communicated by this or these channel.For indirect wireless communication, each radio communication device is directly communicated with relevant base station (such as cellular service) and/or the access point (such as, for domestic or indoor wireless networks) be correlated with by the channel that distributes.In order to complete communication connection between radio communication device, relevant base station and/or relevant access point by system controller, by public phone exchanges network, by the Internet and/or by certain other wide area network, directly communicate with each other.

For each radio communication device participating in radio communication, including embedded radio transceiver (namely, receptor and transmitter) or it is coupled to relevant wireless transceiver (such as, for domestic and/or indoor wireless communication network, rf modulations demodulator).It is known that receptor is coupled to antenna and includes low-noise amplifier, one or more intermediater-frequency stage, filtering stage and data recovery level.Low-noise amplifier receives inbound radio frequency signal by antenna.The radiofrequency signal of amplification is mixed mutually by one or more intermediater-frequency stages with one or more local oscillations, thus the radiofrequency signal of amplification converts to baseband signal or intermediate frequency (IF) signal.Filtering stage filtered baseband signal or intermediate-freuqncy signal, in order to unwanted signal of decaying from band signal, thus producing the signal filtered.Data are recovered level and are recovered initial data from the signal filtered according to specific wireless communication standard.

It is also well known that emitter includes data modulating stage, one or more intermediater-frequency stages and power amplifier.Data modulating stage converts initial data to baseband signal according to specific wireless communication standard.One or more intermediater-frequency stage mixed base band signals and one or more local oscillations, thus producing radiofrequency signal.Power amplifier amplifies radiofrequency signal by antenna before being transmitted.

Generally, emitter includes an antenna, is used for sending radiofrequency signal, and single antenna or the many antennas (or many antennas) of receptor receive radiofrequency signal.When receptor includes two or more antenna, receptor selects an antenna, thus receiving the radiofrequency signal of input.In this case, even if receptor include be used as different antennae many antennas (namely, select an antenna, in order to receive the radiofrequency signal of input), the radio communication between transmitters and receivers is for singly exporting single input (SISO) communication.For single output single input radio communication, major part WLAN (WLAN) uses single output single input radio communication, and WLAN is IEEE802.11,802.11a, 802.11b or 802.11g.

Other kinds of radio communication includes single input and multi-output (SIMO), multiple input single output (MISO) and multiple-input and multiple-output (MIMO).In SIMO radio communication, single transmitter processes data into the radiofrequency signal being transmitted into receptor.Receptor includes two or more antenna and two or more receiver path.Each antenna receives radiofrequency signal, and these signals are supplied to corresponding receiver path (such as, LNA, lower modular converter, wave filter and ADC).Each receiver path processes the radiofrequency signal received, thus producing digital signal, organizes these signals of merging treatment, thus reacquiring the data launched.

For multiple input single output (MISO) radio communication, transmitter includes two or more transmission path (such as, digital to analog converter, wave filter, upper modular converter and power amplifier), corresponding for baseband signal fractional conversion is all become radiofrequency signal by transmission path, sends these signals to receptor by corresponding antenna.Receptor includes single receiver path, and this path receives multiple radiofrequency signal from transmitter.In this case, receptor uses Wave beam forming, processes thus multiple radiofrequency signals are combined into a signal.

For multiple-input and multiple-output (MIMO) radio communication, transmitters and receivers all include multiple path.In this communication, transmitter uses room and time encoding function parallel processing data, in order to produce two or more data stream.Transmitter includes multiple transmission path, thus changing each stream compression into multiple radiofrequency signal.Receptor receives multiple radiofrequency signals by multiple receiver paths, and receiver path uses room and time decoding function to reacquire data stream.Combination and the data stream reacquired with post processing, thus recovering initial data.

By various radio communications (such as SISO, MISO, SIMO and MIMO), it is preferred to use one or more radio communications strengthen the data throughout in WLAN.Such as, compared with communicating with SISO, MIMO communication can realize High Data Rate.But, major part WLAN includes traditional radio communication device (that is, consistent with old edition wireless communication standard device).In such manner, it is possible to carry out the transmitter of mimo wireless communication also should with conventional apparatus back compatible, thus running in most of existing WLAN.

It is therefore desirable to be able to have high data throughput and the wlan device with conventional apparatus back compatible.

Summary of the invention

Provide a kind of equipment according to an aspect of the present invention, including: at least one antenna, from communicator, receive triggered frame；Processor, is used for: determine the first modulating-coding group (MCS) being associated with described triggered frame；And based on an at least described MCS and based at least one the measured parameter being associated with the communication link between described equipment and described communicator, the 2nd MCS generation is selected to have the response frame of described 2nd MCS, wherein, described 2nd MCS is the highest MCS in the basic MCS group being associated with described equipment and described communicator；And, wherein: described response frame is sent to described communicator by least one antenna described.

Wherein, explicitly indicate that in described triggered frame for the 3rd MCS in described response frame；And described processor processes described triggered frame, in order to obtain described 3rd MCS from which, and select described 2nd MCS based at least one the measured parameter being associated with the communication link between described equipment and described communicator by described 3rd MCS.

Wherein, described 2nd MCS has relative to described relatively low for MCS rank.

Wherein, described processor selects described 2nd MCS based at least one in the reduction parameter provided by described communicator and limiting parameter；And when a described MCS is lower than described limiting parameter, based on described reduction parameter, described 2nd MCS has the relatively low rank lower than a described MCS.

Wherein, described equipment is radio station (STA)；And described communicator is access point (AP) or at least one other STA.

Provide a kind of equipment according to a further aspect in the invention, including: at least one antenna, from communicator, receive triggered frame；Processor, is used for: determine the first modulating-coding group (MCS) being associated with described triggered frame；And select the 2nd MCS generation to have the response frame of described 2nd MCS based on an at least described MCS；And, wherein: described response frame is sent to described communicator by least one antenna described.

Wherein: explicitly indicate that in described triggered frame for the 3rd MCS in described response frame；And described processor processes described triggered frame, in order to obtain described 3rd MCS from which, and select described 2nd MCS based at least one the measured parameter being associated with the communication link between described equipment and described communicator by described 3rd MCS.

Wherein, described processor selects described 2nd MCS based at least one the measured parameter being associated with the communication link between described equipment and described communicator.

Wherein, described 2nd MCS is a described MCS.

Wherein, described 2nd MCS has relative to described relatively low for MCS rank.

Wherein, described 2nd MCS is the highest MCS in the basic MCS group being associated with described equipment and described communicator.

Wherein, described processor selects described 2nd MCS based at least one in the reduction parameter provided by described communicator and limiting parameter；And when a described MCS is lower than described limiting parameter, based on described reduction parameter, described 2nd MCS has the relatively low rank lower than a described MCS.

Wherein, described equipment is radio station (STA)；And described communicator is access point (AP) or at least one other STA.

Providing the operational approach of a kind of communicator according to a further aspect in the invention, described method includes: via at least one antenna of described communicator, receives triggered frame from least one other communicator；Determine the first modulating-coding group (MCS) being associated with described triggered frame；Select the 2nd MCS based on an at least described MCS and produce the response frame with described 2nd MCS；And via at least one antenna described in described communicator, described response frame is sent at least one other communicator described.

Wherein, explicitly indicate that in described triggered frame for the 3rd MCS in described response frame；And farther include: process described triggered frame, to obtain described 3rd MCS from which, and select described 2nd MCS based at least one the measured parameter being associated with the communication link between described communicator and at least one other communicator described by described 3rd MCS.

The method farther includes: select described 2nd MCS based at least one the measured parameter being associated with the communication link between described communicator and at least one other communicator described.

Wherein, described 2nd MCS has relative to described relatively low for MCS rank.

Wherein, described 2nd MCS is the highest MCS in the basic MCS group being associated with equipment and described communicator.

Wherein, described 2nd MCS is the highest MCS in the basic MCS group being associated with described communicator and at least one other communicator described.

Wherein, described 2nd MCS is selected based at least one in the limiting parameter of the reduction parameter sum provided by least one other communicator described；And, wherein: when a described MCS is lower than described limiting parameter, based on described reduction parameter, described 2nd MCS has the relatively low rank lower than a described MCS.

Wherein, described communicator is radio station (STA)；And described at least one other communicator are access point (AP) or at least one other STA.

Accompanying drawing explanation

Fig. 1 is the diagram of the embodiment illustrating wireless communication system；

Fig. 2 is the diagram of the embodiment illustrating radio communication device；

Fig. 3 is for illustrating the diagram of the embodiment of radio frequency (RF) transmitter；

Fig. 4 is the diagram of the embodiment illustrating radio frequency receiver；

Fig. 5 is the diagram of the embodiment illustrating the method for Base-Band Processing data；

Fig. 6 is the diagram of the embodiment of the method illustrating the step 120 limiting Fig. 5 further；

Fig. 7 to Fig. 9 is the diagram of the various embodiments illustrating encoded security data；

Figure 10 A and the diagram that Figure 10 B is the embodiment illustrating radio transmitters；

Figure 11 A and the diagram that Figure 11 B is the embodiment illustrating wireless receiver；

Figure 12 is the diagram of the embodiment illustrating multiple WLANs (WLAN) device that one or more different aspects according to the present invention and/or embodiment be operated and access point (AP)；

Figure 13 is the diagram of the embodiment illustrating radio communication device and cluster, and cluster can be used for supporting to communicate with at least one other radio communication device, and wherein, different bands can have different CHs#；OFDM tone can be distributed between 1+ cluster；Cluster=fnc (1+CHs, 1+ are with, or its combination in any) [such as, cluster 1 (CH11, CH12, CH1X), cluster 2 (CH11, Cha1), cluster 3 (CH11, CH12, CH2X, CHaX)]；

Figure 14 illustrates the embodiment that response modulating-coding group (MCS) selects, and for communicating between the communication devices, wherein, the arbitrarily exchange between device includes response (such as, RTS/CTS；DATA, MPDU, A-MPDU, or B-ACK request/B-ACK；MGMT/ACK；DATA/ACK；Deng)；P1, P2 can be entirely different；The response frame TX (such as, based on response frame, the highest MCS≤triggered frame MCS) at the highest MCS place in basic MCS group；

Figure 15 illustrates the response MCS alternate embodiments selected, for communicating between the communication devices, wherein, for the basic MCS group of WDEV all in BSS；

Figure 16 illustrates clear and definite suggestion/instruction response MCS embodiment selected, for communicating between the communication devices；

Figure 17 illustrates the response MCS embodiment selected, and for communicating between the communication devices, especially uses its some interior operating parameter (such as, R, L)；

Figure 18 illustrates the response MCS alternative embodiment selected, and for communicating between the communication devices, especially uses some operating parameter that it is interior, wherein, basic MCS group 0 ... N (such as, the subgroup of MCS group, parameter 0 ... M), different parameters can have different d_min(such as, parameter 1 is d_1,min, parameter 2 is d_2,minEtc.)；

Figure 19 illustrates the embodiment of communication, includes response and reduces field, for communicating between the communication devices in this communication；

Figure 20 illustrates another embodiment of communication, includes response and reduces field, for communicating between the communication devices in this communication；

Figure 21 illustrates the response MCS embodiment selected, and for communicating between the communication devices, based on the determination causing node, wherein, different basic MCS groups is for different nodes (basic MCS group can include more than one node)；

Figure 22 illustrates the response MCS embodiment selected, for communicating between the communication devices, based on the determination of responsive node and retry at least one times；

Figure 23 illustrates the response MCS embodiment selected, and for communicating between the communication devices, based on the determination of responsive node and use the interior minimum MCS of basic MCS group, wherein, basic MCS group can be modified to include minimum MCS；

Figure 24 illustrates the embodiment representing difference power between communicator；

Figure 25 illustrates the response MCS embodiment selected, for communicating between the communication devices, MCS according to using channel/MCS feedback selects, wherein, the first half illustrates that A and B carries out data transmission, link circuit self-adapting feeds back, the latter half illustrates that only A and B carries out data transmission (unidirectional), and other nodes carry out confirming, response etc.；

Figure 26, Figure 27 A, Figure 27 B, Figure 28, Figure 29 A and Figure 29 B illustrates the various embodiments of the method that one or more communicator performs.

Detailed description of the invention

Fig. 1 is the diagram of an embodiment of wireless communication system 10, and this system includes multiple base station and/or access point 12-16, multiple radio communication device 18-32 and a network hardware elements 34.Radio communication device 18-32 can be: notebook host computer 18 and 26, personal digital assistant main frame 20 and 30, individual calculus machine host 24 and 32 and/or cell phone main frame 22 and 28.Referring to Fig. 2, more particularly describe the details of an embodiment of this radio communication device.

Base station (BS) or access point (AP) 12-16 connect 36,38 and 40 by LAN and are operatively coupled to the network hardware 34.The network hardware 34 can be router, switch, bridge, modem, system controller etc., provides wide area network to connect 42 for communication system 10.Each base station or access point 12-16 have relevant antenna or aerial array, in order to connect with the radio communication device in its region.Generally, radio communication device is directed at specific base station or access point 12-14, in order to receive service from communication system 10.For being directly connected to (that is, point-to-point communication), radio communication device is made directly communication by the channel distributed.

Generally, base station is for cell phone system (such as, Advanced Mobile Phone Service (AMPS), numeral AMPS, global system for mobile communications (GSM), CDMA (CDMA), local multipoint distributed system (LMDS), multichannel multiple spot distributed service (MMDS), enhanced data rates for gsm evolution (EDGE), GPRS (general packet radio service) (GPRS), high-speed downlink packet accesses (HSDPA), High Speed Uplink Packet accesses (HSUPA) and/or its variant) and similar system, and access point is for domestic or indoor wireless networks (such as, IEEE802.11, bluetooth, ZigBee, the procotol based on radio frequency of any other type and/or its variant).Unrelated with certain types of communication system, each radio communication device includes built-in radio and/or is coupled to radio.As described here, this radio communication device can be operated according to various aspects of the invention, thus strengthening performance, reducing cost, reducing size and/or strengthen broadband application.

Fig. 2 is the diagram of the embodiment illustrating radio communication device, and this device includes host apparatus 18-32 and relevant radio 60.For cell phone main frame, radio 60 is embedded element.For personal digital assistant main frame, notebook host and/or individual calculus machine host, radio 60 can be embedded or coupled outside element.For access point or base station, element is generally held in single structure.

As it can be seen, host apparatus 18-32 includes processing module 50, memorizer 52, wave point 54, input interface 58 and output interface 56.Processing module 50 and memorizer 52 perform corresponding instruction, and these instructions are generally performed by host apparatus.Such as, for cell phone host apparatus, processing module 50 performs corresponding communication function according to specific cellular telephony standard.

Wave point 54 allows receive data from radio 60 and send the data to radio.For the data (such as, inbound data) received from radio 60, wave point 54 provides data for processing module 50, for processing further and/or being sent to output interface 56.Output interface 56 provides for output display device and connects, for instance display, watch-dog, speaker etc., so received data can be shown.The data of processing module 50 are also supplied to radio 60 by wave point 54.Processing module 50 can be passed through input interface 58 and receive outbound data from input equipment (such as keyboard, button, mike etc.), and generates data itself.For the data received by input interface 58, processing module 50 can perform corresponding host function in data and/or by wave point 54, this function is sent to radio 60.

Radio 60 includes HPI 62, baseband processing module 64, memorizer 66, multiple radio frequency (RF) transmitter 68-72, transmission/reception (T/R) module 74, multiple antenna 82-86, multiple radio frequency receiver 76-80 and local oscillating module 100.Baseband processing module 64 performs digit receiver function and digit emitter function respectively in conjunction with the operational order stored in memorizer 66.Meeting digit receiver function more particularly described below in Figure 11 B, these functions include but not limited to carry out the digital intermediate frequency of baseband-converted, demodulation, cluster (constellation) demapping, decoding, release of an interleave, fast fourier transform, Cyclic Prefix is removed, room and time decodes and/or descrambling.In figure below can digit emitter function more particularly described below, these functions include but not limited to that scrambling, coding, staggered, cluster mappings, modulation, fast Flourier inverse transformation, Cyclic Prefix interpolation, room and time encode and/or carry out the digital baseband of intermediate frequency conversion.Use one or more process device can perform baseband processing module 64.This process device can be microprocessor, microcontroller, digital signal processor, microcomputer, CPU, existing field programmable gate array, programmable logic device, state machine, logic circuit, analog circuit, digital circuit and/or any device handling (simulation and/or numeral) signal according to operational order.Memorizer 66 can be single memory device or multiple storage arrangement.This storage arrangement can be any device of read only memory, random access memory, volatile memory, nonvolatile memory, static memory, dynamic memory, flash memory and/or storage of digital information.It should be noted that, when processing module 64 performs one or more function by state machine, analog circuit, digital circuit and/or logic circuit, the memorizer storing corresponding operational order is embedded with the circuit including state machine, analog circuit, digital circuit and/or logic circuit.

In the process of operation, radio 60 receives outbound data 88 by HPI 62 from host apparatus.Baseband processing module 64 receives outbound data 88 and produces one or more outbound symbol stream 90 based on mode select signal 102.Mode select signal 102 represents specific pattern, as shown in the model selection table occurred during specifically discussed end.Such as, referring to table 1, mode select signal 102 can represent the frequency band of 2.4GHz or 5GHz, 20 or the Maximum Bit Rate of the channel width (such as, width is the channel of 20 or 22MHz) of 22MHz and 54 megabits per second.In other embodiments, channel width extends to 1.28GHz or wider, and the Maximum Bit Rate supported expands to 1 gigabit or bigger per second.In this common classification, modulus selects signal to further indicate that specific speed range is at 1 megabit to 54 megabits per second per second.Additionally, mode select signal represents certain types of modulation, include but not limited to Barker coded modulation, BPSK, QPSK, CCK, 16QAM and/or 64QAM.Table 1 is further illustrated, it is provided that the data bit number (NDBPS) of the upper number of coded bits (NBPSC) of encoding rate and each subcarrier, the number of coded bits (NCBPS) of each OFDM symbol and each OFDM symbol.

Model selection symbol also illustrates that the particular channelization of corresponding modes, has illustrated the information about corresponding modes in table 1 in table 2.It is as shown in the table, and table 2 includes channel number and corresponding mid frequency.Mode select signal can further indicate that power spectrum density mask value, has illustrated the mask value for table 1 in table 3.Mode select signal alternatively represents the ratio in table 4, has the Maximum Bit Rate of the frequency band of 5GHz, the channel width of 20MHz and 54 megabits per second.If this is specific model selection, then illustrate channelizing in table 5.As another alternative, mode select signal 102 can represent the frequency band of 2.4GHz, the channel of 20MHz and the Maximum Bit Rate of 192 megabits per second, as shown in table 6.In table 6, many antennas are used to realize better bit rate.In this case, model selection further indicates that the quantity of the antenna to use.Table 7 illustrates the channelizing arranging table 6.Table 8 illustrates another pattern, and its midband is 2.4GHz, and channel width is 20MHz, and Maximum Bit Rate is 192 megabits per second.As it can be seen, corresponding form 8 includes multiple bit rate and space encoding rate, the scope of bit rate, from 12 megabits to 216 megabits per second per second, uses 2-4 root antenna.Table 9 illustrates the channelizing for table 8.Mode select signal 102 can further indicate that specific operator scheme, and as shown in table 10, corresponding to the Maximum Bit Rate of the frequency band of 5GHz and 486 megabits per second, frequency band has the 40MHz frequency band with 40MHz channel.As shown in table 10, the scope of bit rate, at 13.5 megabits to 486 megabits per second per second, uses 1-4 root antenna and a corresponding space time encoding rate.Table 10 further illustrates specific modulation scheme encoding rate and NBPSC value.Table 11 provides power spectrum density mask value for table 10, and table 12 provides channelizing for table 10.

Certainly, it is noted that, other kinds of channel has different bandwidth, when without departing substantially from scope and spirit of the present invention, can be used in other embodiments.Such as, other channels various are alternately used, for instance those have the channel of 80MHz, 120MHz and/or 160MHz bandwidth, for instance according to IEEETaskGroupac (TGacVHTL6).

Baseband processing module 64 produces to be further described below in one or more outbound symbol stream 90, Fig. 5-9 according to module select signal 102 from outbound data 88.Such as, if module select signal 102 represents that single transmission antenna is used for having been chosen by AD HOC, then baseband processing module 64 can produce single outbound symbol stream 90.Or, if mode select signal represents 2,3 or 4 antennas, then baseband processing module 64 can produce 2,3 or 4 outbound symbol stream 90, outbound symbol stream is corresponding to the quantity of antenna in outbound data 88.

The quantity of outbound symbol stream 90 produced by baseband module 64, the radio-frequency (RF) transmitter 68-72 of respective numbers can convert outbound symbol stream 90 to outbound radio frequency signal 92.Fig. 3 can further describe the enforcement of radio-frequency (RF) transmitter 68-72.Transmission/reception module 74 receives departures RF signal 92, and each outbound radio frequency signal is supplied to corresponding antenna 82-86.

When radio 60 is for reception pattern, transmission/reception module 74 receives one or more departures RF signal by antenna 82-86.Transmission/reception module 74 provides inbound RF signal 94 for one or more radio frequency receiver 76-80.Being more fully described radio frequency receiver 76-80 in Fig. 4, inbound radio frequency signal 94 is converted to the inbound symbol stream 96 of respective numbers by this receptor.The quantity of inbound symbol stream 96 corresponds to specific pattern, receives data (this pattern can for any pattern described in table 1-12) in this mode.Baseband processing module 60 receives inbound symbol stream 90, and converts thereof into inbound data 98, by HPI 62, these data is supplied to host apparatus 18-32.

In an embodiment of radio 60, including transmitters and receivers.Transmitter can include MAC module, PLCP module and PMD module.Media interviews are controlled (MAC) module and can be performed by processing module 64, are operatively coupled, in order to convert MAC Service Data Unit (MSDU) to Medium Access Control (MAC) Protocol Data Unit (MPDU) according to WLAN protocol.Can performing physical layer in processing module 64 and assemble program (PLCP) module, this physical layer is assembled program and is operatively coupled, in order to according to WLAN protocol, MPDU converts PLCP protocol Data Unit (PPDU) to.Relevant (PMD) module of physical medium is operatively coupled, according to a pattern in multiple operator schemes of WLAN protocol to PPDU converted multiple radio frequency (RF) signal, wherein, multiple operator schemes include multi input and multi output combination.

Figure 10 A and 10B is more fully described the embodiment of relevant (PMD) module of physical medium, including error protection module, demultiplexing module and multiple directions modular converter.Can performing error protection module in processing module 64, this error protection module is operatively coupled, in order to adjust PPDU (PLCP (physical layer convergence program) physical data elements), thus reducing the transmission error producing error protection data.Demultiplexing module is operatively coupled, in order to error protection data are divided into multiple error protection data stream.Multiple direct modular converters are operatively coupled, in order to change multiple error protection stream compression into multiple radio frequency (RF) signal.

It will be understood by those skilled in the art that the radio communication device using one or more integrated circuits can perform Fig. 2.Such as, host apparatus can be performed on an integrated circuit, the second integrated circuit can perform baseband processing module 64 and memorizer 66, and the residue element (less than antenna 82-86) of radio 60 can be performed on the 3rd integrated circuit.As the example replaced, radio 60 can be performed on a single integrated circuit.As another example, the processing module 50 of host apparatus and baseband processing module 64 are executable same process device on a single integrated circuit.And, single integrated circuit and/or identical integrated circuit can perform memorizer 52 and memorizer 66, as the same processing module of processing module 50 and baseband processing module 64.

Fig. 3 is the diagram of the embodiment illustrating radio frequency (RF) the transmitter 68-72 of WLAN transmitter or radio-frequency front-end.Radio-frequency (RF) transmitter 68-72 includes digital filter and up-sampling module 75, D/A converter module 77, analog filter 79 and upper modular converter 81, power amplifier 83 and RF wave filter 85.Digital filter and up-sampling module 75 receive an outbound symbol stream 90 and this symbol stream of digital filtering, then by the speed of symbol stream to being upsampled to required speed, in order to produce the symbol stream 87 filtered.D/A converter module 77 converts the symbol 87 of filtration to analogue signal 89.Analog symbol can include in phase element and orthogonal element.

Analog filter 79 filtering analog signal 89, in order to produce the analogue signal 91 filtered.Upper modular converter 81 can include a pair blender and a filter, the analogue signal 91 of this module hybrid filtering and local oscillations 93 produced by local oscillating module 100, in order to produces high-frequency signal 95.The frequency of high-frequency signal 95 is corresponding to the frequency of RF signal 92.

Power amplifier 83 amplifies high-frequency signal 95, to produce the high-frequency signal 97 amplified.Radio-frequency filter 85 can be high freguency bandpass filter, filters the high-frequency signal 97 amplified, in order to produce required departures RF signal 92.

It will be understood by those skilled in the art that each radio-frequency (RF) transmitter 68-72 includes similar structure, as shown in Figure 3; and farther include knock-off gear; so when not needing specific radio-frequency (RF) transmitter, so disabling knock-off gear, in order to do not produce interference signal and/or noise.

Fig. 4 is the diagram of the embodiment illustrating RF receptor.This describes any one RF receptor 76-80.In this embodiment, each radio frequency receiver 76-80 includes RF wave filter 101, low-noise amplifier (LNA) 103, programmable gain amplifier (PGA) 105, lower modular converter 107, analog filter 109, analog-to-digital conversion module 111 and digital filter and down sample module 113.RF wave filter 101 can be high freguency bandpass filter, receives inbound RF signal 94, and filters these signals, thus producing the inbound RF signal filtered.Low-noise amplifier 103 arranges according to gain and amplifies the inbound RF signal 94 filtered, and the signal of amplification is supplied to programmable gain amplifier 105.Before inbound RF signal is supplied to lower modular converter 107, programmable gain amplifier amplifies inbound RF signal 94 further.

Lower modular converter 107 includes a pair blender, summation module and wave filter, with the local oscillations (LO) mixing inbound RF signal and local oscillating module provides, in order to produce analog baseband signal.Analog filter 109 filter analogue baseband signal, and filtered signal is supplied to analog-to-digital conversion module 111, this module converts the signals into digital signal.Digital filter and down sample module 113 filtered digital signal, then adjust sample rate, in order to produces numeral sample (corresponding to inbound symbol stream 96).

Fig. 5 is the diagram of the embodiment illustrating the method for Base-Band Processing data.This diagram shows the method illustrating that outbound data 88 is converted to one or more outbound symbol stream 90 by baseband processing module 64.Starting this process in step 110 place, in this step, baseband processing module receives outbound data 88 and mode select signal 102.Mode select signal can represent any one in multiple operation module, as shown in table 1-12.Then, this process goes successively to step 112, and in this step, baseband processing module is according to pseudo-random sequence scrambled data, thus producing the data of scrambling.It should be noted that generator polynomial S (x)=x can be passed through⁷+x⁴+ 1, feedback shift register produce pseudo-random sequence.

Then, this process goes successively to step 114, and in this step, baseband processing module selects a pattern in multiple coding modes according to mode select signal.Then, this process goes successively to step 116, and in this step, baseband processing module is the data encoding of scrambling according to selected coding mode, thus producing the data of coding.Use any number of encoding scheme (such as, convolutional encoding, Read-solomon (RS) coding, turbo coding, turbo Trellis-coded modulation (TTCM) coding, LDPC (low-density checksum inspection) coding etc.) in one or more encoding schemes, can be encoded.

Then, this process goes successively to step 118, and in this step, baseband processing module determines the quantity of transportation flow according to mode select signal.Such as, mode select signal selects specific pattern, expression 1,2,3,4 or more antenna to can be used for being transmitted.Therefore, the quantity of transportation flow is corresponding to the quantity of the antenna represented by mode select signal.Then, this process goes successively to step 120, and in this step, baseband processing module converts the data of coding to symbol stream according to the quantity of transportation flow in mode select signal.Fig. 6 is more fully described this step.

Fig. 6 is the diagram of the embodiment of the method for the step 120 limiting Fig. 5 further.The diagram illustrate the method that baseband processing module performs, thus quantity and mode select signal according to transportation flow convert the data of coding to symbol stream.This process starts in step 122 place, and in this step, baseband processing module is the data of interleaved code on multiple symbols and subcarrier of channel, thus producing staggered data.Generally, staggered process is designed to propagate the data of coding on multiple symbols and transportation flow.This detection and error correcting capability of allowing for improving receptor.In one embodiment, the IEEE802.11 (a) for backward compatibility mode or (g) standard are followed in staggered process.In order to have higher performance mode (such as IEEE802.11 (n)), also at multiple transport paths or flow enterprising line interlacing.

Then, this process goes successively to step 124, and in this step, staggered data multiplex is divided the multiple concurrent flows using into intercrossed data by baseband processing module.The quantity of concurrent flow is corresponding to the quantity of transportation flow, and the quantity of transportation flow corresponds to the antenna amount represented by the AD HOC used in turn.Then, this process goes successively to step 126 and 128, and in this step, for each concurrent flow of intercrossed data, staggered data are mapped as quadrature amplitude modulation (QAM) symbol by baseband processing module, thus produce frequency domain symbol in step 126 place.In step 128 place, using fast Flourier inverse transformation, baseband processing module can convert frequency domain symbol to time-domain symbol.Frequency domain symbol converts time-domain symbol to, can farther include to add Cyclic Prefix, thus allowing to eliminate intersymbol interference at receptor place.It should be noted that limit the length of fast Flourier inverse transformation and Cyclic Prefix in the pattern table of table 1-12.Generally, 64 point, inverse fast Fourier transform are used for 20MHz channel, and 128 point, inverse fast Fourier transform are used for 40MHz channel.

Then, this process proceeds in step 130 place, and in this step, baseband processing module room and time is each concurrent flow coded time domain symbol of intercrossed data, thus producing symbol stream.In one embodiment, room and time uses encoder matrix that the time-domain symbol of each concurrent flow of intercrossed data is encoded to the symbol stream of respective numbers, thus carrying out room and time coding.Or, room and time uses encoder matrix that the time-domain symbol of the M concurrent flow of intercrossed data is encoded to P symbol stream, thus carrying out room and time coding, and wherein P=2M.In one embodiment, encoder matrix can include following form:

The line number of encoder matrix corresponds to M, and the columns of encoder matrix corresponds to P.The special symbol value of encoder matrix internal constant can be real or imaginary number.

Fig. 7 to 9 is the diagram of the various embodiments for encoding scrambled data.

Fig. 7 is the diagram of a kind of method that baseband processing module can be used for encoding scrambled data in the step 116 of Fig. 5.In the method, the coding of Fig. 7 can include optional step 144, and in this step, baseband processing module is encoded alternatively by outer Read-solomon (RS) code, thus producing RS to encode data.It should be noted that step 144 can carry out with steps described below 140 simultaneously.

And, this process goes successively to step S140, in this step, baseband processing module to scrambled data (RS coding may not be carried out) with 64 conditional codes and G₀=133₈And G₁=171₈Generator polynomial carries out convolutional encoding, thus producing convolutional coded data.Then, this process goes successively to step 142, and in this step, baseband processing module shrinks (puncture) convolutional coded data according to mode select signal with a speed in multiple speed, thus producing coding data.It should be noted that shrinkage factor can include 1/2,2/3 and 3/4, or any speed of defined in table 1-12.It should be noted that for specific pattern, this speed optional, in order to IEEE802.11 (a), IEEE802.11 (g) or IEEE802.11 (n) rate requirement back compatible.

Fig. 8 is the diagram of another kind of coded method that can be used for encoding scrambled data at the step 116 place baseband processing module of Fig. 5.In this embodiment, the coding of Fig. 8 can include optional step 148, and in this step, baseband processing module uses outer RS code to be encoded alternatively, thus producing RS to encode data.It should be noted that step 148 can carry out with steps described below 146 simultaneously.

Then, the method proceeds in step 146 place, and in this step, baseband processing module encodes scrambled data (may not carry out RS coding) according to complementary code keying (CCK) code, thus producing coding data.Can carry out according to IEEE802.11 (b) specification, IEEE802.11 (g) and/or IEEE802.11 (n) specification.

Fig. 9 is the diagram of the another method encoding scrambled data in step 116 place, and baseband processing module can perform this step.In this embodiment, the coding of Fig. 9 can include optional step 154, and in this step, baseband processing module uses outer RS code to be encoded alternatively, thus producing RS to encode data.

Then, in some embodiments, this process proceeds in step 150 place, in this step, baseband processing module performs LDPC (low-density checksum) coding in scrambled data (may not carry out RS coding), thus producing LDPC coded-bit.Or, to scrambled data (RS coding may not be carried out) with 256 conditional codes and G₀=561₈And G₁=753₈Generator polynomial carries out convolutional encoding, thus step 150 can be performed.Then, this process goes successively to step 152, in this step, baseband processing module according to mode select signal with speed punctured convolutional encoding data in multiple speed, thus produce coding data.It should be noted that represent shrinkage factor in table 1-12, for corresponding pattern.

The coding of Fig. 9 can farther include optional step 154, and in this step, baseband processing module is in conjunction with convolutional encoding and outer reed solomon code, thus producing convolutional coded data.

Figure 10 A and 10B is the diagram of the embodiment of radio transmitters.This can include the PMD module of WLAN transmitter.In 10A, baseband processing module includes scrambler 172, channel encoder 174, interleaver 176, demultiplexer 178, multiple symbol mapper 180-184, multiple fast Flourier inverse transformation (IFFT)/cyclic prefix adding module 186-190 and space/clock coder 192.The baseband portion of transmitter can farther include mode manager module 175, this module receive mode select signal 173 and produce radio transmitters part arrange 179, and the speed producing baseband portion selects 171.In this embodiment, scrambler 172, channel encoder 174 and interleaver 176 include error protection module.Symbol mapper 180-184, multiple IFFT/ cyclic prefix adding module 186-190 and space/clock coder 192 include digital base band processor module section.

In the process of operation, pseudo-random sequence is added to (such as, in Galois finite field (GF2)) outbound data bit 88 by scrambler 172, so that data occur at random.By generator polynomial S (x)=x⁷+x⁴+ 1, pseudo-random sequence can be generated from feedback shift register, thus producing scrambled data.Channel encoder 174 receives scrambled data and produces a series of new redundant bit.This just can improve the detection of receptor.Channel encoder 174 can be operated by a pattern in multiple patterns.Such as, in order to IEEE802.11 (a) and IEEE802.11 (g) back compatible, the form of channel encoder is as follows, and speed 1/2 convolution coder has 64 states and generator polynomial is G₀=133₈And G₁=171₈.Speedometer Drive (such as, table 1-12) according to regulation, can be retracted to the speed of 1/2,2/3 and 3/4 by the output of convolution coder.For the CCK pattern back compatible with IEEE802.11 (b) and IEEE802.11 (g), the form of channel encoder is CCK code, as shown in IEEE802.11 (b).In order to have higher data rate (such as those speed described in table 6,8 and 10), channel encoder can use above-mentioned identical convolutional encoding or can use stronger code, including having more multi-mode convolutional code, any one or more above-mentioned different types of error correcting codes (ECC) (such as, RS, LDPC, turbo, TTCM etc.), parallel cascade (turbo) code and/or low-density checksum inspection (LDPC) block code.And, any one in these yards can be combined with outer reed solomon code.According to performance balance, compatibility backward and low latency, it is desirable to have one or more this code.It should be noted that figure below is more fully described cascade turbo coding and low-density checksum inspection.

Interleaver 176 receives encoded data and propagates this data on multiple symbols and transportation flow.This detection and error correcting capability of allowing for improving receptor.In one embodiment, interleaver 176 follows IEEE802.11 (a) or (g) standard in the pattern of back compatible.In order to have the higher pattern of performance (such as, those patterns described in table 6,8 and 10), interleaver is by multiple transportation flow intercrossed datas.Demultiplexer 178 converts the serial cross-current of interleaver 176 to M concurrent flow, is used for being transmitted.

Each symbol mapper 180-184 receives a corresponding M parallel data paths from demultiplexer.Bit stream is mapped to quadrature amplitude modulation qam symbol (such as BPSK, QPSK, 16QAM, 64QAM, 256QAM etc.) according to Speedometer Drive (such as table 1-12) by each symbol mapper 180-182 lock.For IEEE802.11 (a) compatibility backward, double; two Gray code can be used.

The mapping symbols that each symbol mapper 180-184 produces is supplied to IFFT/ cyclic prefix adding module 186-190, carries out the conversion of frequency domain to time domain and add prefix, it is allowed to intersymbol interference removed by receptor.It should be noted that limit length and the Cyclic Prefix of IFFT in the schema table of table 1-12.Generally, 64 IFFT are for 20MHz channel, and 128 IFFT are for 40MHz channel.

Space/clock coder 192 receives the M parallel route of time-domain symbol, and converts thereof into P output symbol.In one embodiment, the quantity of M input path is equal to the quantity of P outgoing route.In another embodiment, the quantity of outgoing route P is equal to 2M path.For each path, incoming symbol is multiplied by encoder matrix by space/clock coder, and the form of encoder matrix is as follows

The line number of encoder matrix is corresponding to the quantity of input path, and columns is corresponding to the quantity of outgoing route.

Figure 10 B shows the radio part of transmitter, including multiple digital filterings/up-sampling module 194-198, D/A converter module 200-204, analog filter 206-216, I/Q manipulator 218-222, RF amplifier 224-228, RF wave filter 230-234 and antenna 236-240.The P output of space/clock coder 192 is received by each digital filtering/up-sampling module 194-198.In one embodiment, digital filtering/up-sampling module 194-198 is digital base band processor module section, and remaining element includes multiple RF front end.In this embodiment, digital base band processor module and RF front end include direct modular converter.

In the process of operation, the quantity of effective radio path is corresponding to the quantity of P output.Such as, iff producing a P outgoing route, then only one of which radio transmitters path is effective.It will be understood by those skilled in the art that the quantitative range of outgoing route can from one to any required quantity.

Digital filtering/up-sampling module 194-198 filters corresponding symbol and adjusts sample rate, in order to corresponding with the sample rate required for D/A converter module 200-204.D/A converter module 200-204 converts the signal of digital filtering and up-sampling to corresponding homophase and Quadrature analog signal.The corresponding homophase of analog filter 208-214 filtering analog signal and/or orthogonal element, and the signal of filtration is supplied to corresponding I/Q manipulator 218-222.I/Q manipulator 218-222 based on local oscillations is generated by local oscillator 100, will convert radiofrequency signal on i/q signal.

Radio frequency amplifier 224-228 amplifies radiofrequency signal, then, before being sent by antenna 236-240, filters these signals by radio-frequency filter 230-234.

The diagram of Figure 11 A and embodiment that Figure 11 B is wireless receiver.These diagrams show the schematic block diagram of another embodiment of receptor.Figure 11 A shows the analog portion of receptor, including multiple receiver paths.Each receiver path includes antenna, RF wave filter 252-256, low-noise amplifier 258-260, i/q demodulator 264-268, analog filter 270-280, analog-digital converter 282-286 and digital filtering and down sample module 288-290.

In the process of operation, antenna receives inbound radio frequency signal, by radio-frequency filter these signals of 252-256 band-pass filter.Corresponding low-noise amplifier 258-260 amplifies the signal filtered, and provides it to corresponding i/q demodulator 264-268.I/q demodulator 264-268 based on local oscillations is generated by local oscillator 100, will convert baseband inphase and Quadrature analog signal under radiofrequency signal.

Corresponding analog filter 270-280 filters homophase and orthogonal simulation element respectively.Homophase is walked around into digital signal with Quadrature analog signal by analog-digital converter 282-286.Digital filtering and down sample module 288-290 filtered digital signal, and adjust sample rate, thus corresponding to the speed of Base-Band Processing, Figure 11 B can be described.

Figure 11 B shows the baseband processing module of receptor.Baseband processing module includes space/temporal decoder 294, multiple fast fourier transform (FFT)/Cyclic Prefix removes module 296-300, multiple symbol demapping module 302-306, Port Multiplier 308, deinterlacer 310, channel decoder 312 and descrambling module 314.Baseband processing module can farther include schema management module 175, and this module produces speed according to model selection 173 and selects 171 and arrange 179.Space/temporal decoder 294 performs the inverting function of space/clock coder 192, receives P input and produce M outgoing route from receiver path.Removing module 296-300 by FFT/ Cyclic Prefix and process M outgoing route, these modules perform the function of IFFT/ cyclic prefix adding module 186-190, thus producing frequency domain symbol.

Symbol demapping module 302-306 uses the reverse step of symbol mapper 180-184 to convert frequency domain symbol to data.The symbol stream of demapping is combined into single path by Port Multiplier 308.

Deinterlacer 310 uses the negative function of the function that interleaver 176 performs to be single path release of an interleave.Then, the data of release of an interleave being supplied to channel decoder 312, this decoder performs the negative function of channel encoder 174.Descrambler 314 receives the data of decoding and performs the negative function of interference unit 172, thus producing inbound data 98.

The diagram of one embodiment of multiple WLANs (WLAN) device that Figure 12 is access point (AP) and one or more different aspects and/or embodiment according to the present invention are operated.According to various aspects of the invention, access point 1200 can be compatible with any amount of communication protocol and/or standard, for instance IEEE802.11 (a), IEEE802.11 (b), IEEE802.11 (g), IEEE802.11 (n).According to certain aspects of the invention, AP also supports the legacy version back compatible with IEEE802.11x standard.According to other aspects of the invention, bandwidth, MIMO size and the data throughput do not supported with previous IEEE802.11x operation standard, AP1200 supports to communicate with wlan device 1202,1204 and 1206.Such as, access point 1200 and wlan device 1202,1204 and 1206 can support channel width, from those bandwidth of the device of previous version and from 40MHz to 1.28GHz and more than.Access point 1200 and wlan device 1202,1204 and 1206 support MIMO size reach 4 × 4 and more than.By these features, access point 1200 and wlan device 1202,1204 and 1206 support data throughput reach 1GHz and more than.

AP1200 supports to communicate with more than one wlan device 1202,1204 and 1206 simultaneously.Multiplexed by OFDM tone assignment (such as, it is intended that certain amount of OFDM tone in cluster), MIMO size or can be communicated by other technologies simultaneously.Communicated by some simultaneously, for instance, AP1200 can be respectively allocated the one or more antennas in its multiple antennas, thus supporting to communicate with each wlan device 1202,1204 and 1206.

And AP1200 and wlan device 1202,1204 and 1206 and the back compatible of IEEE802.11 (a), (b), (g) and (n) operation standard.When supporting this backward compatible, these devices support signal format and the structure consistent with these previous operation standards.

Figure 13 is the diagram of the embodiment illustrating radio communication device and cluster, and cluster can be used for supporting that other radio communication device communicates with at least one.In general, cluster can be considered the Tone Map described in one or more channels (such as, the branch again of frequency spectrum divides), for instance OFDM symbol, these channels can be located in one or more frequency band (such as, having carried out the portions of the spectrum of relatively large separation).As an example, the unlike signal of 20MHz can in 5GHz frequency band or about 5GHz frequency band.Channel in any this frequency band can continuously (such as, adjacent one another are) or be interrupted (such as, by certain protection interval or band gap separate).Generally, one or more channels in the frequency band specified, and can need not have the channel of equal number in different frequency bands.Equally, cluster generally can be regarded as the combination in any of one or more channels in one or more frequency band.In figure visible, any single cluster can be associated with any one or more antennas of radio communication device (few to an antenna and up to all of antenna).

The radio communication device of this figure can be any one (such as AP, wlan device or other radio communication devices, include but not limited to those described in Fig. 1, etc.) in dissimilar and/or equivalent described herein.Radio communication device includes many antennas, and one or more signals can be sent to one or more reception radio communication device by these antenna and/or can be received from other radio communication devices one or more.

This cluster can be used for by different one or more selected antenna transmission signals.Such as, different clusters is for using one or more different antenna to send signal respectively.

In different diagrams shown and described herein and embodiment, radio communication device is commonly referred to WDEV.It should be noted that when without departing substantially from scope and spirit of the present invention, this radio communication device can be radio station (STA), the radio communication device of access point (AP) or any other type.

In some cases, some radio communication device may be generally viewed as transmission radio communication device, for instance AP, and other radio communication devices may be generally referred to as reception radio communication device, for instance STA.It is, however, to be noted that any function described herein, ability etc. are generally used for any kind of radio communication device.

Certainly, it should be noted that, relative to some embodiment, generic term can be used herein, wherein, radio communication device is received (such as relative to multiple other, STA), send radio communication device (such as, AP or be used as the STA of ' AP ' relative to other STA) proceed by communication, and/or be used as the radio communication device of network controller-type, receive radio communication device (such as, STA) in the process supporting this communication, in response to sending radio communication device and collaboration.Certainly, this generic term sending radio communication device and reception radio communication device can be used for distinguishing the operation that in communication system, these different radio communication devices carry out, and in communication system, all this radio communication devices can support to travel to and fro between the two-way communication of other radio communication devices in communication system certainly.In other words, various transmission radio communication devices and reception radio communication device all can support to travel to and fro between the two-way communication of other radio communication devices in communication system.In general, this function described herein, ability etc. are generally used for any radio communication device.

The various aspects of invention described herein and principle and equivalent thereof are applicable to various standard, agreement and/or recommendation measure (include currently carry out those), such as those (such as, wherein x is a, b, g, n, ac, ah, ad, af etc.) according to IEEE802.11x.

Figure 14 illustrates the embodiment that response modulating-coding group (MCS) selects, for communicating between the communication devices.In this diagram and other diagrams, some communicator (radio communication device or WDEV) is described.But, reader will appreciate that, be typically referenced to device, node etc., these devices, node should be equally understood that as similar to radio communication device.

Can be seen that in this figure, the device that at least two is different is represented by reference number 1401 and 1402, for communicating betwixt.In some cases, by the first communication from after a device provides another device, responding communication being restored in the device being initially provided of the first communication.An example according to this diagram, and relative to any other diagram herein and/or embodiment, it should be noted that any this communication exchanges with certain type of responding communication can include the one or more different aspects according to the present invention and equivalent thereof.

Such as, various communications and/or the exchange with response frame can include in response to sending the clear to send (CTS) that request (RTS) provides.Other communications various can include confirming (B-ACK), MAC (media interviews control) data protocol unit (MPDU), MAC (media interviews control) data protocol unit (A-MPDU) of polymerization or block confirmation request in response to the block of data.Even in other cases, in response to management communication, data communication etc., it is possible to provide confirm (ACK).

In general, the initial frame in exchange can be described as initiation pin.The device sending triggered frame may be generally referred to as initiation node, for instance causes node A.The device of transmission response frame may be generally referred to as responsive node, for instance responsive node B.

According to some application, can have relatively large difference between the transmission power level of different device.Along communication link there is so big difference between the transmission power level of different device time, it is necessary to consider that controlling responsiveness and MCS selects.Such as, certain control responsiveness and MCS select rule (the asymmetric transmitter power that such as, different device uses in the opposite end of communication link) in these cases to have problems.When the speed that positive direction (such as causing the triggered frame of node A) uses is near or below basic rate value the highest in basic service sets (BSS), the speed that response frame (response frame of such as responsive node B) uses is too high for communication link.Unfortunately, losing these situations, namely the confirmation (ACK) of responsive node B or block confirm (B-ACK).There is provided herein the various embodiments reducing any one or more operating parameters, these parameter management response frames communicate.Such as, also with disclosed herein the same, for instance referring to Figure 17, according to this reduction principle, it may include any one or more operating parameters, these parameters manage the communication between two devices in the end opposite of communication link.

Such as, difference between the transmission power level of two different devices is at more than 10dB, under these particular circumstances, such as, when device uses one or more higher power, can perform and operable power amplifier (PA) and another device, in order to only send relatively smaller power.Such as, when wireless communication system, for instance WLAN, operable base station, to send the signal level of about 1W, operable given radio station, to send the signal level of about about 100mW.Difference bigger between each transmission power level can be used, thus causing some to operate herein.

Considering further embodiment, compare to one or more relevant radio stations (STA) (such as, be not used as AP), access point (AP) has higher transmit power.Operable AP, thus being transmitted with the power of about 30dBm and operable one or more STA, thus being transmitted with the power of about 15dBm, consider this situation, the asymmetric parameter allowing to use operation of this transmit power, being transferred to one or more STA from AP middle and lower reaches, this operating parameter is higher than the operating parameter that can be used for being transferred to AP from one or more STA middle and upper reaches.Such as, modulating-coding group (MCS) is considered as an operating parameter (or one group of operating parameter, because quantity of MCS itself corresponding at least modulation, encoding rate, stream etc.), of a relatively high MCS can be used for being transferred to one or more STA from AP middle and lower reaches, is transferred to AP not for from any one STA middle and upper reaches.

According to the communication carried out between two independent devices, at least one device is responding communication, can select the modulating-coding group (MCS) for that response in several ways.

In one embodiment, according to triggered frame transfer rate or MCS, select to control the MCS of transfer rate or response frame.Such as, implicitly assume that each communication link surplus is roughly the same in both direction, and each device is roughly the same at the transmission power level that often end uses of communication link, then MCS can be responded and select.

In some cases, sending response frame with MCS the highest in basic MCS group, compared with triggered frame, basic MCS group has identical or less modulation.That is, these intrasystem all devices can understand basic MCS group in advance.Feature according to triggered frame, including its MCS, uses the highest MCS in basic MCS group to send this response frame.Such as, the transfer rate of response frame is set to the flank speed in the basic rate group of basic service sets (BSS) (such as, or being called BSSBasicRateSet), and this speed is less than or equal to the speed of triggered frame.The MCS of response frame can be set to most high modulation, coding and MCS index, each value M (is used for modulating), C (being used for encoding) and I (for MCS index) is less than or equal to the analog value of triggered frame, start from the basic MCS group of basic service sets (BSS) (such as, or be called BSSBasicRateSet).Such as, consider that triggered frame includes the embodiment of capitalization M1, C1 and I1 value, the analog value of response frame can be set to the peak in basic MCS group, less than or equal to M1, C1 and I1 (such as, the analog value of response frame can be set to M2≤M1, C2≤C1 and I2≤I1 make M2, C2 and I2 be all contained in basic MCS group in).

It should be noted that, it is not necessary to use the MCS comprised in basic MCS group by causing node (such as triggered frame) to communicate.From this embodiment, based on the MCS Response to selection frame MCS of triggered frame.

For example, it is contemplated that the situation that complexity is relatively low, basic MCS group includes three MCS (for example, it is assumed that high MCS, middle MCS and low MCS).If MCS sends triggered frame in the middle of using, then this middle MCS can be used to send response frame.Equally, if using the MCS between high MCS and middle MCS to send triggered frame, then be used as middle MCS and send response frame.

If necessary, at the upper adjustable MCS of transmission control protocol (TCP) response and/or confirmation, but MCS need not be adjusted in media interviews control (MAC) response and/or confirmation, therefore adjust MAC layer and earlier decompose.

When certain embodiments described herein is operated according to reduction principle, in this principle, control the one or more operating parameters for response frame so that it is less than the corresponding one or more operating parameters for triggered frame, such as it is enough to be different from (such as, according to minimum distance d_min), can have some situation following, in these cases, for there is sufficiently large surplus between one or more independent operating parameter and the response of triggered frame, it is not required that by this reduction principle.Such as, even in some embodiment not using this reduction principle especially, if the one or more operating parameters for triggered frame are sufficiently more than or are higher than the one or more corresponding operating parameter for response frame (such as, consider according to BSSBasicRateSet and/or BSSBasicMCSSet), so can have the surplus of abundance, in order to avoid impaired performance.

Provide below the example that at least two is different, for explaining the situation to reader, selects the one or more operating parameters relevant to response frame can receive/provide sufficient performance, and unacceptable/poor/insufficient performance is provided.

Illustrated below is an example, wherein for there is sufficient surplus between one or more operating parameters of triggered frame and those operating parameters for response frame.

Example 1:

APTX power=30dBm

APDATA transmits

Link supports 40MHzMCS31=64QAMR=5/6,540Mbps

Non-APSTATX power=15dBm

BSSBasicRate_highest=16QAMR=1/2,24Mbps

As control response BA, 16QAMR=1/2,24Mbps that non-HT copy sends

Forward link supports maximum 64QAM, R=5/6

Power is when below 15dB, and 16QAM, R=1/2 is applicable to reverse link

Can be seen that from this example, one or more operating parameters for response frame are fully different from those operating parameters for triggered frame, response frame is sent in AP as uplink communication from STA (being such as not used as AP), and triggered frame is sent to STA as downlink communication from AP.

Example 2:

APTX power=30dBm

APDATA transmits

Link only supports 40MHzMCS27=16QAMR=1/2,216Mbps

Non-APSTATX power=15dBm

BSSBasicRate_highest=16QAMR=1/2,24Mbps

As control response BA, 16QAMR=1/2,24Mbps that non-HT copy sends

Forward link supports maximum 16QAM, R=1/2

Power is when below 15dB, and 16QAM, R=1/2 is not suitable for reverse link

ACK/BA can be lost

Can be seen that from this example, communication link can support the highest modulation 16QAM and the code check of about 1/2.Perform the half that through-put power is the through-put power that triggered frame uses of response frame, use this operating parameter right up to the limit, at this limit place, communication link and support are uncertain, and scenario described below can be caused, in the uplink communication process from STA to AP, confirmation (ACK) can be lost or block confirms (B-ACK).

Figure 15 illustrates the response MCS replacement embodiment selected, for communicating between the communication devices.In this figure visible, performing the different device of at least two, thus communicating betwixt, reference number 1501 and 1502 representing.The figure shows specific embodiment, wherein, cause node A to be suitable to be transmitted with 30dBm, responsive node B is suitable to be transmitted with 15dBm.

As can be seen, when considering to cause node A and of a relatively high transmission power level thereof, of a relatively high rank (order) modulation can be used to send triggered frame.Such as, this higher contrast system can include 16QAM, 64QAM etc..Even with the contrast system that these are of a relatively high, perform responsive node B, in order to be properly received these triggered frames.

Responsive node B modulating the highest MCS, the MCS that use in basic MCS group less than or equal to from causing the modulation sending triggered frame in node A.Such as, consider with specific bit rate (such as the Mbps of 24Mb per second) by the MCS that specifies from the embodiment causing node A to send triggered frame, then the response frame from responsive node B transmission can be sent with relatively low MCS in identical MCS or basic MCS group.

In some cases, owing to responsive node B transmission power ratio causes node A through-put power substantially much lower, node A is caused can not to be successfully received response frame.That is, different through-put powers and MCS combine for specific communication link is inadequate.

Unfortunately, on other occasions, owing to response frame is lost in transmitting procedure, the handling capacity of communication link sharply declines.The MCS of response frame will not change, unless caused the node A MCS of triggered frame sent to become relatively low rank MCS (such as, become relatively low contrast system).Select according to the response frame MCS made based on triggered frame MCS, if causing node A to become relatively low rank MCS, then responsive node B also should can send response frame with relatively low rank MCS, and causes node A to be expected to receive response frame.

From certain angle, it is noted that, cause the MCS on node A to decline and also can cause the throughput degradation of communication link.If it is, however, to be noted that use the method for some replacement can reduce response frame MCS, then completely without this undesirable situation.

Figure 16 illustrates clear and definite suggestion/instruction response MCS embodiment selected, for communicating between the communication devices.In this figure visible, perform the different device of at least two (being represented by reference number 1601 and 1602), thus communicating betwixt.

Referring to this figure, swap between the various devices, so providing clear and definite suggestion and/or instruction from causing node A.It should be noted that when only determining the specific MCS of needs, can from causing node A to provide this suggestion and/or instruction.Such as, by the one or more Considerations in multiple Considerations, it may be determined that need specific MCS.Such as, according to each transmission power level difference value between each device in system, can clearly be determined.The information that can provide clear and definite between the various devices exchanges, so that it is determined that each transmission power level of each device, and it is also determined that transmission power level difference value therebetween.

Causing node A place to receive in the process of response frame, alternatively, can be determined by measured reception power.Such as, when causing node A from another device reception response frame, the reception power of this reception communication can be measured.In some cases, the relatively low power that receives of this reception communication can be used for triggering and will cause the node A demand to specific MCS advised.

Even in other embodiments, this measurement channel/bit error rate (BER)/packet error rate (PER) statistics determining the specific acknowledgement frame that can be sent by responsive node B by measurement and be received by initiation node A is carried out.That is, can be used for promoting to select specific MCS with by some feature causing node A (but not the power only received) response frame received to be associated.

Additionally, some link measurement report information can be used for this terminal.Equally, make the decision specified, thus before providing suggestion and/or instruction to the responsive node B of relevant specific MCS, cause node A can the parameter of average some measurement, should therefrom provide response frame by specific MCS.

Also, it should be noted that the one or more or any combinations (including specific weighted array, average combined etc.) in any this Consideration can be used for causing node A place to trigger response frame MCS selection.Even in other cases, responsive node E can ask to cause the specific response frame MCS that node is advised and/or push-notification-answer node B to use simply.

Figure 17 illustrates the response MCS embodiment selected, and for communicating between the communication devices, especially uses some operating parameter that it is interior.In this figure visible, perform the different device of at least two (being represented by reference number 1701 and 1702), thus communicating betwixt.

According in the process that this pattern is operated, use any one or more in above-mentioned various consideration or combination in any, node A is caused to can determine that the parameter that at least two is different, R (reduction) and L (restriction), these considerations are as follows, cause the specific response frame MCS that node A suggestion and/or push-notification-answer node B to use.In some embodiments, parameter R and/or L can be considered respective vector (such as, each respectively describing one or more parameter, these parameters be associated with causing this communication between node A and responsive node B；The MCS such as specified itself can include multiple parameter, for instance modulation, encoding rate, stream quantity etc.).It is also noted that some embodiment can only include a parameter R (reduction).Such as, all of embodiment need not include parameter L (restriction), but can simply use parameter R (reduction).And, any one or two parameter R (reduction) and parameter R (reduction) can be considered vector, because any one in the two parameter can according to multiple operating parameters regulation or management operation.

The parameter R relevant with reduction relates to the MCS of the responsive node B response frame sent, and this MCS should be the R rank of below the MCS for triggered frame transmission.Such as, if transmitting triggered frame by the MCS specified, response frame MCS should be at least R rank of below the MCS of triggered frame.

The parameter L relevant with restriction relates to the value of one or more operating parameter, at the following application parameter R of these parameters.It should be noted that be used as in the embodiment of vector at parameter L, for instance corresponding to multiple operating parameters, multiple different values can be used for one or more operating parameter, application parameter R under these parameters.Similarly there are parameter R and be used as the embodiment of vector, for instance corresponding to multiple operating parameters.Equally, in general, using parameter L in parameter R, can cooperate use, in order to separately and individually manages multiple operating parameter.For example, it is contemplated that parameter L includes L1, L2, L3 etc. and parameter R includes the embodiment of R1, R2, R3 etc., parameter L1 is corresponding to the value of the first operating parameter, application parameter R1 under this parameter.Parameter L2 is corresponding to the value of the second operating parameter, and application parameter R2 under this parameter is, and parameter L3 is corresponding to the value of the 3rd operating parameter, application parameter R3 etc. under this parameter.In general, the parameter L being embodied as vector is used to allow to manage multiple different operating parameters according to reduction described herein and restriction principle into the parameter R of vector with implementing.

Such as, in one embodiment, the parameter L relevant with restriction relates to modulation/coding triggered frame, application parameter R under triggered frame.That is, L place or on, responsive node B parameter R need not be applied to response MCS select.On the contrary, responsive node B can use the method for certain replacement, selects MCS by the method, by this MCS, response frame should be sent to initiation node A.Such as, responsive node B may select the MCS of basic MCS in basic MCS group, and this highest MCS is less than or equal to the MCS of triggered frame.Certainly, additive method can be used for Response to selection frame MCS.

Generally, for parameter R and the L that these are different, if the speed of response frame (such as, confirming) is too high, then can correspondingly adjust these different parameters.It should be noted that due to multiple differences, including conflict, inappropriate MCS selection etc., it is possible to lose these respective frame.

It should be noted that cause node A to can be used for determining that these different parameter R and L, responsive node B are also aware that these parameters.Such as, node A is caused also can to send these parameters to responsive node B.In several ways can by these parameters from causing node A to send responsive node B to.Such as, can on static basis, for instance according to combining exchange, so transmit these parameters.Or, can so transmit these parameters on half dynamic basis；Management frame can be used to carry out this transmission, in order to transmit change in any time specified.Even in another embodiment, triggered frame itself can be used, for instance so transmit these parameters according to dynamic basic manipulation mode.It should be noted that not all of triggered frame needs to carry any MCS suggestion and/or the instruction from causing node A to responsive node B.Such as, responsive node B is continuing with instruction and/or the suggestion of up-to-date/most recently received relevant MCS, until receiving the new instruction about MCS and/or suggestion from causing node A.It is said that in general, in various embodiments, any one in multiple required mode can be used, inform initiation node A and responsive node B by parameters R and the L adopted in each embodiment.

In the embodiment replaced, by causing node A and responsive node B, these different parameter R and L can be understood in advance.That is, can pre-determine, pre-define these parameters, and be stored in certain memorizer of each device.Even in other embodiments, the default value of these parameters can be understood in advance by this intrasystem different device.

Multiple Considerations can be used for determining parameter R and L.Such as, can be used as determining at least one Consideration of these parameters from the number of retries of the frame specifying node to send.Retrying of triggered frame receives from node, and the triggered frame retried is successfully received from responsive node B, and is confirmed by responsive node B.Represent that, in the process of transmission, response frame loses (such as, not receiving confirmation) it should be noted that retry.Response frame selects owing to each communication link carries out suitable MCS, so can be lost unfortunately.In some embodiments, responsive node B can try to differentiate between the loss of this response frame that conflict causes and unsuitable MCS selects the loss of this response frame caused.It should be noted that when losing response frame in the conveyer meeting (TXOP) including at least one complete Frame switch, unsuitable MCS can be distinguished and selects the loss of the response frame caused.Even in other embodiments, cause node A that some can be taked take action, in order to determine the loss of response frame that difference reason causes.

Similarly there are some situation following, it is proposed that response MCS can not by the communication link support specified.Such as, the inspection causing the transmission power reported of the node A transmission power more than responsive node B can determine that it is proposed that response MCS improper.Equally, the inspection (and determining that through-put power A is more than through-put power B) of each node each through-put power of A and B and the link margin (if it is known that words) that combines with responsive node through-put power need not support it is proposed that response MCS.

Such as, when the difference of each transmission power exceedes the difference of minimum signal to noise ratio (SNR) required between triggered frame MCS and response frame MCS, response frame MCS can suitably reduce.The amount that MCS reduces can be determined according to the difference of each transmission power of each node A and B and estimated link margin.Can have some situation following, wherein, relatively low responsive node through-put power has sufficient surplus, still it is enough to/is sufficiently used for the communication link specified, such as, if two devices are for receiving bag, there is goodish probability (such as, acceptable signal-to-interference ratio (SNR)/packet error rate (PER) and/or acceptable bit error rate (BER)/packet error rate (PER)).

Adjustment also considered herein is for the time of one or more operating parameters of response frame.When connecting two or more device or in process, the information with exchange correlation can be collected.Or, one or more management frames between these devices commutative outside connecting.Such as, as described in Figure 24 below, between the device that each are different, exchange the information relevant to through-put power in a different manner.

Compared with known communication link, the information relevant to reverse direction link can have the form that relative surplus reduces.For example, as it is known that during one or more operating parameter, it is intended that communication link can be operated by these parameters, with and compared with the relevant one or more operating parameters of the communication link specified, relative link margin can be reduced.In some embodiments, responsive node B knows forward link information, still needs the information corresponding to reverse link.Equally, in some cases, cause node A to know reverse link information, still need the information corresponding to forward link.Between the different device in the different ends of communication link, can sharing this information by various modes, these modes include by one or more management Frame switch.Such as, link management report can be sent to, from the device being positioned at communication link one end, another device being positioned at the communication link other end.Even in other embodiments, it is intended that device can individually determine the information relevant to opposite direction link (such as, it is not necessary to provide communication or information from another device being arranged in the communication link other end).

Figure 18 illustrates the response MCS alternative embodiment 1800 selected, and for communicating between the communication devices, especially uses some operating parameter that it is interior.In this figure visible, perform the different device of at least two (being represented by reference number 1801 and 1802), thus communicating betwixt.

It should be noted that different embodiments can be operated according to different decision operation patterns.Such as, some embodiment can be operated according to the decision operation pattern based on exciton (elicitor), and other embodiments can be operated according to the decision operation pattern based on transponder.

Such as, for for the decision operation pattern of exciton, initiating device (such as, radio station (STA)) can be used for determining relative to response frame, reduces one or more operating parameter.Such as, such operating parameter is considered as transfer rate, it may be determined that need to reduce responsiveness.A possible embodiment according to this operator scheme, can provide in management Frame switch and need what reduce to measure relevant information.The embodiment that another one according to this operator scheme is possible, the information that can provide in triggered frame and need the amount that reduces relevant.Such as, at least one field in triggered frame can represent the amount that reduction is specified.By reducing a number of step (such as, N number of step), can representing and reduce the amount specified, wherein, a step is corresponding to the change at least one operating parameter.Certainly, it is noted that, different operating parameters can be managed according to different step (such as, for the step 1 modulated, for the step 2 etc. of encoding rate).In general, it is possible to provide substantial amounts of granularity, thus can managing individually, control, reduce, adjusting each different operating parameter.

What also to describe is herein, for instance, for the parameter L relevant to operating parameter, application parameter R under this parameter, there is certain instruction, operating parameter basis can perform this instruction on operating parameter, in this parameter or under can perform this reduction function.Such as, consider the operating parameter of modulation, such as, primarily determine that the MCS for response frame response is less than certain predetermined value (such as, limiting according to parameter L), then according to the step specified, MCS for responding can reduce (such as, in step N, reduce the MCS initially determined that, in order to for response frame).

Equally, according to this decision operation pattern based on exciton, initiating device is (such as, it is positioned at the radio station (STA) causing node A place) operable, control (MAC) lasting (DUR) field thus suitably adjusting media interviews and cause transmission.

Considering another example, relative to the decision operation pattern based on transponder, device (radio station (STA) such as, used at responsive node B place) can be used for determining to be needed to reduce one or more operating parameter.This responding device, by checking that through-put power can make this decision, reports this inspection from another device (such as, from causing the node A access point (AP) used or causing radio station (STA)).Or, by repeatedly repeating reception, for instance, repeatedly retry, do not receive confirmation etc., this decision can be made.According to the decision operation pattern based on transponder, responsive node B can be used for determining the amount of the reduction used.In some embodiments, responsive node B is preferably intended to or attempts so to reduce to cause node A, so causing node A can suitably adjust each MACDUR value in its respective initiation transmission；This information can be transmitted between the various devices by one or more management exchanges.

Referring particularly to this figure, whole MCS group includes between 0 to M multiple values of change (such as, these values correspond to a specific operating parameter, for instance modulation, encoding rate, stream quantity etc.), basic MCS group includes the multiple values changed between 0 to N.Visible, basic MCS group can be considered the subgroup of whole MCS group.Cause node A according to any one value of each MCS value in whole MCS group, communication can be supported, but responsive node B according to those values in basic MCS group, can support communication.Also illustrate herein, cause node A that those in basic MCS group need not be used specifically to be worth, be used for supporting communication therein.According to reduction principle shown here, if causing node A to use be included in M and N+d_minBetween whole MCS group in any value, triggered frame is sent to responsive node B, then response frame is sent to initiation node A time, the spendable peak of responsive node B is that N is (such as, as minimum range d_minBasic MCS group in each peak, the corresponding value lower than for triggered frame).And, in order to conveniently be described, the figure shows the multiple values corresponding to single operation parameter, simultaneously it should be noted that many class values can be had, corresponding to the operating parameter that each are different.Reader can suitably understand, and excites frame can include multiple different parameter, for instance M1, M2, M3 etc., but, in order to conveniently be described, the figure shows and the relation of single operation parameter.

For minimum range d_minParameter, it is noted that, be separated by minimum distance with for the value of that corresponding operating parameter in triggered frame for the corresponding value of operating parameter specified in response frame.That is, in this example, always it is separated by minimum distance with for the value of that corresponding operating parameter in triggered frame for the value of operating parameter specified in response frame.

The particular instance that the value of the operating parameter that consideration is specified is especially relevant with MCS, it is considered to the available triggered frame of any MCS and basic MCS group place between 0 and 27, any MCS includes minimum distance d_min=2, the maximum MCS of basic MCS group is 16 (any MCS that such as basic MCS group includes between 0 and 16), if the MCS of triggered frame be 18 or more than, then response frame MCS can be provided in the MCS of 16.As long as that is, use 18 or above MCS triggered frame is provided, then use the maximum MCS in basic MCS group, namely 16, it is possible to provide response frame.But, if using the MCS of 16 to provide triggered frame, then owing to needing to meet minimum required distance, so maximum MCS is not provided that response frame in using basic MCS group；In this case, the MCS of 14 is used can to provide response frame.In general, MCS maximum in basic MCS group is used, it is possible to provide response frame, maximum MCS still conforms to minimum required distance.

Figure 19 illustrates the embodiment 1900 of communication, includes response and reduces field, for communicating between the communication devices in this communication.Various communication is carried out, for individually controlling and adjusting different operating parameters between the different device of the opposite end of communication link.On the basis of each MAC (media interviews control) data protocol unit (MPDU) signaling, some embodiment can carry out this communication between the devices.Such as, in some embodiments, in triggered frame, one or more operating parameter is preferably included, in response frame subsequently.That is, triggered frame can be used for including one or more operating parameter, and these parameter signals represent the mode providing response frame.It should be noted that some embodiment and relevant frame format thereof not can be used for representing the sufficient bit position of its interior this information.But, other embodiments various and relevant frame format thereof, for instance new frame format, may be designed to be included in triggered frame this information.

A possible embodiment 1900 shown in this Fig illustrates that the response operating parameter comprised in communication reduces field.This response operating parameter reduces field can include each different decreasing value that the operating parameter different from each is associated.Such as, according to individually different decreasing value, any one parameter in multiple different parameters can be controlled respectively.Decreasing value is each the minimum reduction amount used between these operating parameters, uses these operating parameters in triggered frame and response frame.Such as, multiple first operating parameter P1, P2, P3 etc. can be used for triggered frame.Decreasing value represents each the reduced minimum (such as, thus generating P1', P2', P3' etc.) in these operating parameters P1, P2, P3 etc. respectively, and these operating parameters can be used for response frame.Visible, the different decreasing value of each independent operating parameter can be managed individually.

From causing node A to responsive node B can carry out this communication, reduce field including operating parameter.Such as, can have following embodiments, wherein, cause node A to determine that each decreasing value is associated with one or more operating parameters.In other embodiments, causing node A and responsive node B to co-operate, thus determining each decreasing value, even in other embodiments, responsive node B determines that each decreasing value is relevant to one or more operating parameters.

Figure 20 illustrates another embodiment 2000 of communication, includes response and reduces field, for communicating between the communication devices in this communication.The figure shows the specific format of communication, reduce field including response operating parameter, especially towards MCS.That is, the response operating parameter reduction field of this figure particularly relates to response MCS reduction field.Certainly, can be seen that in previous embodiment, response operating parameter reduces field can include any amount of operating parameter.It is a specific embodiment that response MCS in this figure reduces field.

The response negotiation that mode field can be used for inquiring between the device that each are different is reduced referring to this figure, MCS.Response MCS reduces field and includes multiple different decreasing value, and decreasing value is the minimum reduction amount used between those corresponding parameters, uses these parameters in triggered frame and response frame.Specifically, in the figure, response MCS reduces field and includes the son field that at least three is independent, and these son fields correspond respectively to and modulate minimum reduction amount and the minimum reduction amount relevant with the quantity (such as the quantity NSS of space time stream) of stream that relevant minimum reduction amount is associated with encoding rate.

Considering the certain operational parameters of modulation, the difference between QPSK and BPSK modulation can be considered a step (such as, step 1 is the modulation variation from QPSK to BPSK) of this operating parameter.Considering the certain operational parameters of encoding rate, the difference between 5/6 and 3/4 can be considered a step of this operating parameter.Considering the certain operational parameters of the quantity of stream, the difference between NSS=4 and NSS=3 can be considered a step of this operating parameter.

If it should be noted that reduce the operating parameter specified, non-existent MCS can be produced, then can so reduce, thus producing the MCS of in esse/reality.Such as, if carried out reducing operation, thus producing the QPSK of the modulation type that encoding rate is 5/6, then carry out reducing operation, thus finding out the MCS of in esse/reality, for instance, encoding rate is the QPSK of 3/4.

It is also noted that certain management Frame switch can be carried out between different devices.Such as, the classification according to high-throughput (HT), new management action can be used.This can be used for providing and controls to respond MCS reduction.This can also be used for including response operating parameter and reduces parts (parts described in such as Figure 19) and/or response MCS reduction parts (such as, the parts described in Figure 20).

For the request according to this management exchange or triggered frame, the value of request (REQ) field can be set to 1.Can from radio station (STA) (such as, be not used as access point (AP)) etc. in device, this communication is sent in another devices such as relevant AP or another STA (such as, without making access point (AP)).Dispensing device, for instance STA, will not reduce in claim frame, unless accepted by the recipient of claim frame.

For the response frame according to this management exchange, the value of REQ field can be set to 0.This communication can be sent from devices such as access point AP to another device STA etc. to be sent to.Or, from the devices such as STA (such as, be not used as AP), this communication can be sent in the request units such as another STA (such as, without making AP).Uncalled response can be sent in system other device by the device that AP etc. specify, and can defer to this uncalled response.

Provide below some examples, for setting forth relevant operation to reader, by reducing and without reducing with regard to executable operation, relevant operation can be performed.

Do not carry out the example reduced:

● reduction=MOD1, Coding1, NSS0

● BSSBasicMCSSet includes MCS0 MCS15

●STA1TXAMPDUMCS23(64Q,5/6,4)

● STA2 determines that BA response is for MCS15 (64Q, 5/6,2)

● STA2 determines and meets all of minimum, is therefore made without reducing

Carry out the example 1 reduced:

● reduction=MOD1, Coding1, NSS0

● BSSBasicMCSSet includes MCS0 MCS15

●STA1TXAMPDUMCS18(QPSK,3/4,3)

● before reducing, STA2 determines that BA response is for MCS10 (QPSK, 3/4,2)

● STA2 determines some minimum of not met, it is therefore desirable to reduce

● reduce and provide BPSK, 1/2,2=> MCS8

Carry out the example 2 reduced:

● reduction=MOD1, Coding1, NSS1

● BSSBasicMCSSet empties, and BSSBasicRateSet includes 24,12,6

●STA1TXAMPDUMCS18(QPSK,3/4,3)

● STA2 determines that triggered frame MCS is at or below the limit, be there is a need to reduce

● before reducing, STA2 determines that BA response is for 24Mbps (16Q, 1/2,1)

● reduce and provide BPSK, 1/2,1=> 6Mbps

Figure 21 illustrates the response MCS embodiment selected, for communicating between the communication devices, according to based on the confirmation causing node.In this figure visible, perform the different device of at least two, reference number 2102 and 2102 represent, thus communicating betwixt.In some embodiments, additional device (such as being represented by 2103 to 2104), it is also possible in communicating with other devices.

In this figure visible, different devices can be operated according to different basic MCS groups.Such as, the first basic MCS group may correspond to first device, and the second basic MCS group may correspond to the second device, etc..It should be noted that more than one device can be included in the group being operated according to the basic MCS group specified.In general, different basic MCS groups can be used for nodes different in system.The Consideration relevant with causing the node A response frame MCS selection carried out can consider the ability of each node, communication link etc. at least partly.That is, can have multiple communication link between initiation node and different responsive node.Can determine which device and which basic MCS group is relevant causing between node and the responsive node specified, so that it is determined that the basic MCS group of the responsive node for specifying.Equally, dynamically each responsive node is classified by one or more basic MCS groups；Such as, it is intended that device once can be associated with the first basic MCS group, and second time can be associated with the second basic MCS group.

According to causing node A place to respond frame MCS this embodiment selected, cause node can be implemented as operable to transmit the access point (AP) of basic MCS group, select this group, so that it is guaranteed that cause node/AP can effectively and suitably receive the response transmission of all of responsive node in basic service sets (BSS).Such as, in the embodiment causing node to be operated as AP, it is suitable to remove those higher MCS value from basic MCS group, thus using those MCS value not in corresponding transmission.

Or, in causing the embodiment that is operated as AP of node, different basic MCS group can be provided for different responsive node.These responsive node with the through-put power ability of reduction can distribute to basic MCS group, and this group has the MCS (such as, being operated) of reduction according to relatively low contrast system, less speed etc..In some cases, when being operated according to this embodiment, each basic MCS group clearly transmitted can be sent to each responsive node respectively.Such as, the first basic MCS group can from causing node to be sent to the first responsive node, and the second basic MCS group can be sent to the second responsive node from initiation node, etc..Can be operated by ignoring those responsive node that this basic (especially customized/specific) the MCS group corresponding to this responsive node by the basic MCS group of broadcast causing node/AP to send, can be received.Such as, when causing node/AP generally can be sent or broadcast in system by basic MCS group each responsive node, if given responsive node be received specifically/special basic MCS group uses, then this responsive node given can be ignored and broadcasts basic MCS group.It should be noted that any this basic MCS group can once be sent to given responsive node.

Also, it should be noted that this embodiment can include a kind of device, by this device, can basic for personalization MCS group being recalled from those responsive node, these groups have been dispensed in those responsive node.Such as, there is following situation, it is desirable to the initiation node/AP returning all of responsive node is operated in same basic MCS group, and different each basic MCS group selection of not according to and operate some responsive node discriminatively.In order to carry out this refreshing/reinitialize operation, cause node that one or more response joint can be instructed to return in the basic MCS group of common broadcast.Or, there is scenario described below, each responsive node is respectively provided with the information relevant to some basic MCS group, cause node can be sent to one or more responsive node, to return to basic MCS group (such as, by from causing node to arranging specific bit in the given communication of one or more responsive node).

Figure 22 illustrates that basis based on the determination of responsive node and retries the embodiment selected of the response MCS for communication between communicator at least one times.In this figure visible, perform the different device of at least two (being represented by reference number 2201 and 2202), thus communicating betwixt.

Even in other embodiments, responsive node itself can respond frame MCS selection.That is, response frame MCS selects can to carry out at responsive node place, responsive node independently determine, it is not necessary to by the guidance causing node.

Such as, if a node from retry receives retrying of triggered frame, triggered frame was previously successfully received by responsive node and was confirmed by responsive node, so can reduce the response frame MCS for being transferred to given node, such as, also similar to other embodiments above-mentioned, retry and represent in the process of transmission, the response loss such as confirmed.This loss is selected to cause by the inappropriate MCS of the communication link given.Responsive node can be embodied as and include distinguishing the response loss that causes of conflict and inappropriate MCS selects the ability of the response loss that can cause.Such as, when losing response (such as, confirm) in the transmission opportunity (TXOP) including at least one complete Frame switch, can distinguish and select relevant communication loss to inappropriate MCS.

Similarly there are some situation following, it is proposed that response MCS can not by the communication link support given.Such as, the inspection causing the through-put power reported of the node A through-put power more than responsive node B can determine that it is proposed that response MCS improper.Equally, the inspection (and determining the through-put power through-put power more than B of A) of each through-put power of each node A and B and the link margin (if it is known that words) combined with responsive node through-put power, it is not necessary to support proposed response MCS.

Such as, when the difference of each through-put power exceedes the difference of minimum signal to noise ratio (SNR) required between triggered frame MCS and response frame MCS, reduce response frame MCS and be likely to suitable mode.The amount of MCS can be reduced according to the difference of the through-put power of each node A and B and estimated link margin.There is some situation following, relatively low responsive node through-put power is still enough to/is sufficiently used for the communication link specified that surplus is sufficient, for instance, if two devices all receive information bag (such as acceptable BER/PER) with goodish probability.

Figure 23 illustrates that basis based on the determination of responsive node and uses the interior minimum MCS of basic MCS group for the embodiment of the response MCS selection of communication between communicator.In this figure visible, perform the different device of at least two (being represented by reference number 2302 and 2302), thus communicating betwixt.In some embodiments, additional device, for instance, represented by 2303 to 2304, it is also possible in communicating with other devices.

Respond in frame MCS other the embodiment selected even at responsive node place, response frame can be sent simply at minimum MCS place.Such as, in basic MCS group, use it to be likely to minimum MCS and can send response frame simply.Such as, as simple alternative, in order to avoid it needs to be determined that relative transition power value, assessment link margin, check retry etc., default behavior can be used, response frame can be sent by which.One such default logo may be included in basic MCS group and sends response frame with minimum MCS.

It should be noted that the basic MCS group specified can be revised, to include the minimum MCS given.Such as, in the embodiment that multiple responsive node are operated according to multiple each basic MCS groups, if needing to provide response frame at shared minimum MCS place for the multiple responsive node in multiple basic MCS groups, so can revise one or more basic MCS group, to include such shared minimum MCS (such as so that all of each basic MCS group includes this minimum MCS shared).

All of response transmission can be simply used the MCS of this reduction by responsive node.The MCS of this reduction can be considered compared with the requirement of the highest MCS used in basic MCS group, is relatively smaller than or is equal to the MCS of triggered frame.

Figure 24 illustrates the embodiment representing difference power between communicator.In this figure visible, perform the different device of at least two (being represented by reference number 2401 and 2402), thus communicating betwixt.

It is the same with the description that other diagram and/or embodiment carry out herein, it is noted that, in system, each transmission power level of different device is for response frame MCS at least one standard selected.Such as, for indicating for power difference, each respective nodes can represent at the transmission power level used to the process of association.

In the embodiment replaced, certain management Frame switch can be carried out between two.One such example is measure request and report (LinkMeasurementRequestandReport) function (such as REVmb.8.5.7.4) according to link.Such as, link measurement request frame uses parts of action form and sends this frame by radio station (STA), thus asking another STA to be responded by link measurement request frame, so as to measures link path loss and estimates link margin.Reader is referring also to the link measurement report frame format of 8.5.7.5 part.

Even in the alternative embodiment, it is noted that, can according to each frame (such as, dynamically according to each frame), it is provided that specify the instruction of the transmission power level of node.The instruction of this transmission power level can be included in MAC header.

Figure 25 illustrates and selects the embodiment selected of the response MCS for communicating between communicator according to the MCS using channel/MCS feedback.In this figure visible, perform the different device of at least two (being represented by reference number 2501 and 2502), thus communicating betwixt.

In this figure visible, there is situations below, the both direction at given communication link can carry out data communication, for instance, causing between node A and responsive node B.In other words, another node is all carried out data transmission by node A and B.Carry out in the example of data communication actually in both direction, two devices that communication link is often held all use link circuit self-adapting.In general, if carrying out data communication in both direction, can obtain and then can use this information relevant to link circuit self-adapting and function.

But, there is some situation following, carry out data communication only in a direction, such as from causing node A to responsive node B, responsive node B is provided solely for a response frame, for instance, return and cause node A to carry out confirming (but not to causing node A to provide Frame).In this case, responsive node B is to causing node A can carry out extra communication, in order to assist according to link circuit self-adapting function.

In general, link circuit self-adapting can be used for the MCS (such as, 9.27 link circuit self-adaptings of REVmb) that selects on forward link.

If having forward and backward business, so similar to forward link self adaptation method also can be previously discussed for the instruction link given, link circuit self-adapting feedback (such as, MCS feedback) can be used for data service, transmits this data service in the direction identical with response frame.Link circuit self-adapting feedback can be used for the selection MCS transmitted in the same direction, as response frame.Identical link circuit self-adapting feedback can be used for selecting the MCS for response frame.This can provide safer surplus for response frame.That is, compared with the data communication provided along identical direction, optional relatively low MCS is for response frame.Additionally, in the process connected, may indicate that any difference (such as, safe clearance therebetween) between the MCS for data and response.

Figure 26, Figure 27 A, Figure 27 B, Figure 28, Figure 29 A and Figure 29 B illustrates the various embodiments of the method that one or more communicator performs.

Referring to the method 2600 of Figure 26, as shown in block 2610, from the communicator that at least one is extra, (such as, via at least one antenna of communicator) receive triggered frame, thus starting the method that performs 2600.As shown in block 2620, method 2600 proceeds: determine the first modulating-coding group (MCS) being associated with triggered frame.

Then, as shown in block 2630, method 2600 is operated: based on an at least MCS, selects the 2nd MCS and generation to have the response frame of the 2nd MCS.As shown in block 2640, method 2600 proceeds: be sent to by response frame at least one extra communicator (such as, via at least one antenna of communicator).

Referring to the method 2700 of Figure 27 A, as shown in block 2710, start the method that performs 2700: identify the MCS explicitly indicated that in triggered frame (such as, via at least one antenna of communicator, receiving) from least one extra communicator.As shown in block 2720, method 2700 proceeds: identify at least one the measured parameter being associated with the communication link between communicator and the communicator that at least one is extra.

Then, as shown in block 2730, method 2700 is operated: based in part at least one the measured parameter identified, by MCS shown in triggered frame, select the MCS that at least one is extra,.

Referring to the method 2701 of Figure 27 B, as shown in block 2711, from network manager, (such as, via at least one antenna of communicator) receive basic MCS group, thus starting the method that performs 2701.As shown in block 2721, method 2701 proceeds: receive triggered frame (such as, by least one antenna of communicator) from the communicator that at least one is extra.

Then, as shown in block 2731, method 2701 is operated: have the response frame of the 2nd MCS selected as the 2nd MCS of the most high-order MCS in basic MCS group and generation.As shown in block 2741, method 2701 proceeds, and is sent to by response frame at least one extra communicator (such as, via at least one antenna of communicator).

Referring to the method 2800 of Figure 28, as shown in block 2810, it is determined that the MCS being associated with triggered frame, thus starting the method that performs 2800.Determined, as shown in block 2820, method 2800 proceeds: determine that whether the MCS being associated with triggered frame is lower than L (such as, limiting parameter).

If determining that a MCS is lower than L in decision block 2820, then then, as shown in block 2830, method 2800 is operated: based on the R for response frame (such as, reduce parameter), select the 2nd MCS, the 2nd MCS has the relatively low rank lower than a MCS.

Or, if determining that a MCS is not less than L in decision block 2820, then then, as shown in block 2840, method 2800 is operated: select the 2nd MCS for response frame by other means.

Referring to the method 2900 of Figure 29 A, as shown in block 2910, the first basic MCS group is sent to first communication device, thus starting the method that performs 2900.As shown in block 2920, method 2900 proceeds: the second basic MCS group is sent to secondary communication device.

Then, as shown in block 2930, method 2900 is operated: receive the first signal from first communication device based on the MCS as high-order MCS most in the first basic MCS group.As shown in block 2940, method 2900 proceeds: receive secondary signal from secondary communication device according to the MCS as high-order MCS most in the second basic MCS group.

Referring to the method 2901 of Figure 29 B, as shown in block 2911, according to a MCS, the first triggered frame is sent at least one extra communicator (such as, via at least one antenna of communicator), thus starting the method that performs 2901.As shown in block 2921, method 2901 proceeds: after a period of time, does not receive response frame.

Then, as shown in block 2931, method 2901 is operated: according to the 2nd MCS than a MCS with relatively low order, and the second triggered frame is sent at least one extra communicator (such as, via at least one antenna of communicator).As shown in block 2941, method 2901 proceeds: according to the 2nd MCS or the 3rd MCS than the 2nd MCS with relatively low order, receives response frame from the communicator that at least one is extra.

It will also be noted that, can perform according to the various operations that various methods are described and function herein in radio communication device, for instance use baseband processing module and/or the processing module (such as the processing module 50 according to baseband processing module 64 and/or Fig. 2) performed in it and/or its other interior elements.Such as, this baseband processing module can produce this signal described herein and frame, and carries out various operations described herein and analysis or any other operation and function etc. or its equivalent described herein.

In certain embodiments, this baseband processing module and/or processing module (can perform in identical device or independent device) can carry out this process, thus producing signal, for according to various aspects of the invention, and/or the operation and function etc. of described herein any other, or its equivalent, use at least one radio in any amount of radio and at least one antenna in any amount of antenna, it is transferred to another radio communication device (such as, also at least one radio in any amount of radio and at least one antenna in any amount of antenna are included).In certain embodiments, the processing module in first device and the baseband processing module in the second device carry out this process jointly.In other embodiments, this process is undertaken by baseband processing module or processing module completely.

Spendable term " substantially " and " about " provide the dependency between tolerance and/or the article that industry is generally acknowledged for corresponding term herein.The range of tolerable variance that this industry is generally acknowledged from lower than 1% to 50%, and corresponding to and be not limited to component value, integrated circuit technology change, variations in temperature, the number of times of rise and fall and/or thermal noise.The scope of this dependency between article is from the difference of several percentage ratios to huge difference.Between term used herein " is operatively coupled to ", " being coupled to " and/or " coupling " includes between article direct-coupling and/or article by intermediary's article (such as, article include but not limited to element, parts, circuit and/or module) INDIRECT COUPLING, wherein, for INDIRECT COUPLING, the unmodified signal message of intermediary's article, but its current level of adjustable, voltage level and/or power level.Further spendable deduction coupling (that is, parts are coupled to another parts by deduction) includes directly or indirectly coupling between two article herein, and its mode is identical with " being coupled to ".The term " exercisable " that herein can use further or " being operatively coupled to " represent that article include the connection of one or more power, input, output etc., so that when activating, perform its corresponding function one or more, and these article can farther include deduction and be coupled in other article one or more.The term " being associated " that herein also can use further includes the article directly and/or indirectly coupling independent article and/or embedding in another article.Spendable term " advantageously comparing " represents that the comparison carried out between two or more article, signal etc. provides required relation herein.Such as, signal 1 than signal 2 have bigger amplitude be required relation time, when the amplitude of signal 1 is more than the amplitude of signal 2 or the amplitude of signal 2 less than the amplitude of signal 1 time, favourable comparison can be carried out.

The term " processing module " that may be used herein, " module ", " process circuit " and/or " processing unit " is (such as, including various modules and/or circuit, for instance operable, perform and/or be used for encoding, for decoding, for those modules of Base-Band Processing etc. and circuit) can be single process device or multiple process device.This process device can be any device that microprocessor, microcontroller, digital signal processor, pico computer, CPU, existing field programmable gate array, programmable logic device, state machine, logic circuit, analog circuit, digital circuit and/or hard coded and/or operational order according to circuit handle (simulation and/or numeral) signal.Processing module, module, process circuit and/or processing unit can have relevant memorizer and/or integrated memory member, and these parts can be the flush type circuit of single memory device, multiple storage arrangement and/or processing module, module, process circuit and/or processing unit.This storage arrangement can be any device of read only memory (ROM), random access memory (RAM), volatile memory, nonvolatile memory, static memory, dynamic memory, flash memory, cache memory and/or storage of digital information.It should be noted that, if processing module, module, process circuit and/or processing unit include multiple process device, so can centralized positioning (such as, it is directly coupled together by wiredly and/or wirelessly bus structures) maybe can position (such as, carrying out cloud computing by LAN and/or wide area network by INDIRECT COUPLING) with being distributed these process device.And, it should be noted that, if processing module, module, process circuit and/or processing unit perform one or more functions by state machine, analog circuit, digital circuit and/or logic circuit, then the memorizer and/or the memory member that store corresponding operational order can embed the outside including in the circuit of state machine, analog circuit, digital circuit and/or logic circuit or can be at these circuit.It is also noted that, memory member can store hard coded and/or operational order, and processing module, module, process circuit and/or processing unit perform hard coded and/or operational order, these instructions correspond at least some step described in one or more figure and/or function.This storage arrangement or memory member can be included in goods.

Above already by the method step of the performance setting forth its specific function and relation, describe the present invention.In order to conveniently be described, within it optionally define boundary and the order of these functional components and method step.As long as being appropriately performed specific function and relation, so that it may limit the boundary substituted and order.Therefore, any this replacement boundary or order in the scope and spirit of claimed invention.And, in order to conveniently be described, optionally define the boundary of these functional components.As long as being appropriately performed some important function, so that it may limit the boundary substituted.Equally, its interior flow chart component has also at random been defined, in order to set forth certain important function.In the degree used, also define flow chart component boundary and order, and these boundaries and order have still performed certain important function.Therefore, the definition of this replacement of functional component and flow chart component and order is in the scope and spirit of claimed invention.It will be understood by those skilled in the art that functional component and other illustrative components herein, module and element can be used for being illustrated or can be performed by suitable processor of software of discrete component, special IC, execution etc. or its combination in any.

In one or more embodiments, also have been at part and describe the present invention.At this, embodiments of the invention are used for setting forth the present invention, one aspect of the present invention, feature, concept and/or example.The physical embodiments embodying the equipment of the present invention, goods, machine and/or operation can include one or more aspect, feature, concept, example etc., is described referring to one or more embodiments described herein.And, in figure visible, what embodiment can include using identical or different reference number has the function of same or similar name, step, module etc., equally, these functions, step, module etc. can be same or analogous function, step, module etc. or different functions, step, module etc..

Contrary unless specifically stated any use, otherwise, it is sent to the signal in the parts in any width figure shown herein, can be analog or digital, continuous time or discrete time and single-ended or differential signal from the signal between the signal and/or these parts of these parts.Such as, if signal path is single-ended path, differential signal path is also illustrated that.Equally, if signal path is differential path, single ended signal paths is also illustrated that.Those skilled in the art will recognize that, while being described herein as one or more specific structure, being used as other structures, these structures use the one or more data/address bus being not explicitly shown, being directly connected to and/or INDIRECT COUPLING between miscellaneous part between parts.

When describing each embodiment of the present invention, use term " module ".Module includes functional component, performs this component by hardware, thus performing one or more functions of modules, for instance process one or more input signal, thus producing one or more output signal.The hardware itself performing module is operated in combinations with software and/or firmware.Module as used herein can comprise this one or more submodules as module.

While being expressly recited the various functions of the present invention and the particular combination of feature, these features and function also are able to carry out other combinations herein.The present invention is not subjected to the restriction of particular instance disclosed herein, and clearly comprises other this combination.

Model selection table:

Table 1:2.4GHz, 20/22MHz channel BW, 54Mbps Maximum Bit Rate

Table 2: for the channelizing of table 1

Table 3: for power spectral density (PSD) mask of table 1

Table 4:5GHz, 20MHz channel BW, 54Mbps Maximum Bit Rate

Table 5: for the channelizing of table 4

Table 6:2.4GHz, 20MHz channel BW, 192Mbps Maximum Bit Rate

Table 7: for the channelizing of table 6

Table 8:5GHz, 20MHz channel BW, 192Mbps Maximum Bit Rate

Table 9: for the channelizing of table 8

Table 10:5GHz, has the Maximum Bit Rate of 40MHz channel and 486Mbps

Table 11: for power spectral density (PSD) mask of table 10

Table 12: for the channelizing of table 10

Claims (7)

1. the equipment for communicating, including:

At least one antenna, is configured to receive triggered frame from another communicator；

Processor, is used for:

Process described triggered frame to determine the first modulating-coding group (MCS) of described triggered frame；And

Based on described first modulating-coding group and based at least one the measured parameter being associated with the communication link between described equipment and described communicator, the second modulating-coding group generation is selected to have the response frame of described second modulating-coding group for the follow-up transmission via communicator described in described at least one day alignment, wherein, described second modulating-coding group is the most high order modulation code set in the basic modulating-coding group group being associated with described equipment and described communicator, and wherein

Described processor selects described second modulating-coding group based at least one in the reduction parameter provided by described communicator and limiting parameter；And

When described first modulating-coding group is lower than described limiting parameter, selecting described second modulating-coding based on described reduction parameter, wherein, described second modulating-coding group has the relatively low rank lower than described first modulating-coding group.

2. equipment according to claim 1, wherein:

Process described triggered frame to identify the 3rd modulating-coding group explicitly indicated that in described response frame；And

Based at least one the measured parameter being associated with the communication link between described equipment and described communicator by the second modulating-coding group described in described 3rd modulating-coding group selection.

3. the equipment for communicating, including:

At least one antenna, is configured to receive triggered frame from another communicator；

Processor, is used for:

Process described triggered frame to determine the first modulating-coding group (MCS) of described triggered frame；And

There is the response frame of described second modulating-coding group for the follow-up transmission via communicator described in described at least one day alignment based on described first modulating-coding group selection the second modulating-coding group generation, and wherein

Described processor selects described second modulating-coding group based at least one in the reduction parameter provided by described communicator and limiting parameter；And

When described first modulating-coding group is lower than described limiting parameter, selecting described second modulating-coding group based on described reduction parameter, wherein, described second modulating-coding group has the relatively low rank lower than described first modulating-coding group.

4. equipment according to claim 3, wherein:

Process described triggered frame to identify the 3rd modulating-coding group explicitly indicated that in described response frame；And

Based at least one the measured parameter being associated with the communication link between described equipment and described communicator by the second modulating-coding group described in described 3rd modulating-coding group selection.

5. equipment according to claim 3, wherein:

Described processor selects described second modulating-coding group based at least one the measured parameter being associated with the communication link between described equipment and described communicator.

6. the method that communicator performs, described method includes:

Via at least one antenna of described communicator, receive triggered frame from least one other communicator；

Process described triggered frame to determine the first modulating-coding group (MCS) of described triggered frame；

There is the response frame of described second modulating-coding group based on described first modulating-coding group selection the second modulating-coding group generation；And

Via at least one antenna described in described communicator, described response frame is sent at least one other communicator described, wherein

Described second modulating-coding group is selected based at least one in the reduction parameter provided by least one other communicator described and limiting parameter；And, wherein:

When described first modulating-coding group is lower than described limiting parameter, selecting described second modulating-coding group based on described reduction parameter, wherein, described second modulating-coding group has the relatively low rank lower than described first modulating-coding group.

7. method according to claim 6, wherein:

Process described triggered frame, to identify the 3rd modulating-coding group explicitly indicated that in described triggered frame；And

Based at least one the measured parameter being associated with the communication link between described communicator and at least one other communicator described by the second modulating-coding group described in described 3rd modulating-coding group selection.