CN103369713B - Session after network coordinator or ap reboot recovers - Google Patents

Abstract

The present invention relates to the session after network coordinator or ap reboot recover.Due to a variety of causes (such as; power cycle or power failure, the transfer protection of inappropriate fault, plan or the power failure planned is such as to include network operation, software upgrading etc.); network coordinator (such as, access point (AP) or other network coordinator types of devices) can be restarted.When determining that network coordinator is restarted or resets, single position in the communication of network coordinator shows to synchronize, and there is no its Timing Synchronization Function (such as, with other devices in communication system, such as wireless site (STA), intelligent meter station (SMSTA) etc. together).Setter (such as, STA, SMSTA etc.) can provide its current TS F to network coordinator so that it can resynchronize, rebuild its planning wakeup time (such as, target wakeup time (TWT)) etc. for these devices.

Description

Session after network coordinator or ap reboot recovers

Cross reference to related applications

This application claims that the U.S. of the Serial No. 61/617,607 in submission on March 29th, 2012 faces Time patent application and the United States Patent (USP) of Serial No. 13/836,267 submitted on March 15th, 2013 The preference of application, entire contents is hereby incorporated by by causing.

Technical field

The present invention relates generally to communication system；More particularly, to for unique user, multiple user, Session after at least one communicator in multiple access and/or mimo wireless communication is restarted is extensive Multiple.

Background technology

Known communication system supports the wireless and cable modem between wireless and/or wire communication device Letter.Such communication system scope from domestic and/or international cell telephone system to internet to point-to-point Home wireless network.Each type of communication system all according to one or more communication standards structure and because of This operation.Such as, wireless communication system can according to one or more standard operations, including but do not limit In IEEE802.11x, bluetooth, Advanced Mobile Phone Service (AMPS), numeral AMPS, the whole world GSM (GSM), CDMA (CDMA), Local Multipoint Distribute System (LMDS), Multichannel multi-point distribution system (MMDS) and/or its modification.

Due to various types of radio communications (such as, single-input single-output (SISO), multi input list Output (MISO), single input and multi-output (SIMO) and multiple-input and multiple-output (MIMO)), uncommon Hope the radio communication of the one or more types of use thus strengthen the data throughout in WLAN.Example As, compare with SISO communication, high data rate can be realized with MIMO communication.But, mostly Number WLAN includes that conventional wireless communications devices is (that is, compatible with the wireless communication standard of older version Device).Equally, it is possible to the transmitter performing mimo wireless communication also should with conventional apparatus backward Compatible thus work in most of existing WLAN.Accordingly, there exist and be capable of high data and gulp down The amount of telling the needs of the wlan device with conventional apparatus back compatible.

Summary of the invention

According to an aspect of the present invention, the invention provides following equipment:

(1) a kind of equipment, including:

At least one communication interface, receives the first signal from access point (AP)；And

Processor:

Analyze described first signal and restart or multiple determining that described AP has experienced the most Position；

It is set to predetermined value based on the single position in described first signal, determines described Whether the first signal comprises asking of Timing Synchronization Function (TSF) value to described equipment Ask；

When determining that described AP is restarted or resetted described in having experienced and described when determine When first signal comprises the described request of the described TSF value to described equipment, generate bag The secondary signal of the described TSF value containing described equipment；And wherein:

At least one communication interface described transmits secondary signal to described AP；

Described equipment is a wireless site (STA) in multiple wireless site (STA)；

Before restarting or reset described in having experienced at described AP, the plurality of STA is according to One planning wakes up up respectively more than first target wakeup time (TWT)；And

After restarting or reset described in described AP has experienced, the plurality of STA is according to Two planning wake up up respectively at more than second TWT.

(2) according to the equipment described in (1), wherein:

When TSF value in described first signal is different from expection TSF value, described process Device determines that described AP is restarted or resetted described in having experienced.

(3) according to the equipment described in (1), wherein:

Based on the count value of restarting in described first signal, described processor determines described AP Restart described in having experienced or reset.

(4) according to the equipment described in (1), wherein:

Described AP based on time reference generate described second planning, described time reference based on The described TSF value received from described equipment.

(5) according to the equipment described in (1), wherein:

Described AP is based on the described TSF in the described secondary signal being included in described equipment Value, resets or adjusts local TSF value therein.

According to a further aspect in the invention, the invention provides following equipment:

(6) a kind of equipment, including:

At least one communication interface, receives the first signal from least one other equipment；And

Processor:

Analyze described first signal to have determined at least one other equipment described the most Experience is restarted or resets, and determines whether described first signal comprises described equipment The request of Timing Synchronization Function (TSF) value；And

When restarting or reset described at least one other equipment described in determining having experienced, And determining that described first signal comprises described in the described TSF value to described equipment During request, generate the secondary signal of the described TSF value comprising described equipment；And its In:

At least one communication interface described is believed at least one other device transmission second described Number.

(7) according to the equipment described in (6), wherein:

When TSF value in described first signal is different from expection TSF value, described process Device determines that at least one other equipment described is restarted or resetted described in having experienced.

(8) according to the equipment described in (6), wherein:

Described processor based on restarting count value in described first signal, determine described at least One other equipment is restarted or is resetted described in having experienced.

(9) according to the equipment described in (6), wherein:

Being set to predetermined value based on the single position in described first signal, described processor is true Fixed described first signal includes the described request of the described TSF value to described equipment.

(10) according to the equipment described in (6), wherein:

Described equipment is a wireless site (STA) in multiple wireless site (STA)；

Before restarting or reset described in having experienced at least one other equipment described, described many Individual STA wakes up up more than first target wakeup time (TWT) respectively according to the first planning； And

After restarting or reset described at least one other equipment described has experienced, described many Individual STA wakes up up at more than second TWT respectively according to the second planning.

(11) according to the equipment described in (10), wherein:

At least one other equipment described generates described second planning based on time reference, described Time reference is based on the described TSF value received from described equipment.

(12) according to the equipment described in (6), wherein:

At least one other equipment described is based on the described secondary signal being included in described equipment Interior described TSF value, resets wherein or adjusts local TSF value.

(13) according to the equipment described in (6), wherein:

Described equipment is wireless site (STA)；And

At least one other equipment described is access point (AP).

According to a further aspect in the invention, the invention provides following communicator method of operating:

(14) a kind of communicator method of operating, described method includes:

Operate at least one communication interface of described communicator additionally to lead to from least one T unit receives the first signal；

Analyze described first signal so that it is determined that at least one other communicator described whether Experience and restarted or reset, and determined whether described first signal comprises described communicator The request of Timing Synchronization Function (TSF) value；

When restarting or reset described at least one other communicator described in determining having experienced, And determining that described first signal comprises described in the described TSF value to described communicator During request:

Generate the secondary signal of the described TSF value comprising described communicator；And

Operate at least one communication interface described of described communicator with to described extremely A few other communication device transfers secondary signal.

(15) according to the method described in (14), farther include:

When TSF value in described first signal is different from expection TSF value, determine described At least one other communicator is restarted or is resetted described in having experienced.

(16) according to the method described in (14), farther include:

Based on restarting count value in described first signal, determine described at least one additionally Communicator is restarted or is resetted described in having experienced.

(17) according to the method described in (14), farther include:

It is set to predetermined value based on the single position in described first signal, determines described first Signal includes the described request of the described TSF value to described communicator.

(18) according to the method described in (14), wherein:

Described communicator is a wireless site in multiple wireless site (STA) (STA)；

Before restarting or reset described in having experienced at least one other communicator described, institute State multiple STA to call out respectively more than first target wakeup time (TWT) according to the first planning Wake up；And

After restarting or reset described at least one other communicator described has experienced, institute State multiple STA to wake up up respectively at more than second TWT according to the second planning.

(19) according to the method described in (14), farther include:

At least one other communicator described is based on being included in described in described communicator Described TSF value in secondary signal, resets wherein or adjusts local TSF value.

(20) according to the method described in (14), wherein:

Described communicator is wireless site (STA)；And

At least one other device described is access point (AP).

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 to illustrate the one or more various aspects according to the present invention and/or the access of embodiment The diagram of the embodiment of point (AP) and multiple wireless lan (wlan) device.

Fig. 4 is the diagram of the embodiment illustrating radio communication device and cluster, and this embodiment is permissible For supporting the communication with at least one other radio communication device.

Fig. 5 illustrates OFDM(OFDM) embodiment.

Fig. 6 is shown in the various positions in the environment including building or structure the several nothings implemented The embodiment of line communicator.

The reality of the several radio communication devices implemented in the various positions that Fig. 7 is shown in vehicle environment Execute mode.

Fig. 8 is shown in the various positions of broad distributed industrial environments the several channel radios implemented The embodiment of T unit.

Fig. 9 illustrates the optional embodiment restarting detection of communicator.

Figure 10 illustrates the optional embodiment restarting detection of communicator.

Figure 11 illustrates network coordinator (such as, access point (AP)) Timing Synchronization Function (TSF) The embodiment that timer recovers.

Figure 12 illustrates the embodiment of storage session encryption key.

Figure 13 illustrates the embodiment that every relating attribute recovers.

Figure 14 is the embodiment illustrating the method for operating one or more radio communication device Diagram.

Detailed description of the invention

Fig. 1 is to illustrate to include multiple base station and/or access point 12-16, multiple radio communication device 18-32 Diagram with the embodiment of the wireless communication system 10 of network hardware component 34.Radio communication device 18-32 can be above-knee host computer 18 and 26, personal digital assistant main frame 20-30, Ge Renji Calculate machine host 24-32, and/or cell phone main frame 22 and 28.The reality of such radio communication device The details executing mode are described in more detail with reference to Fig. 2.

Base station (BS) or access point (AP) 12-16 are suitable to connect 36,38 and 40 through LAN It is coupled to the network hardware 34.Can be router, switch, bridge, modem, system control The network hardware 34 of device processed etc. provides wide area network to connect 42 for communication system 10.Base station or access point In 12-16 each there is associated antenna or aerial array thus with in its region radio communication fill Put communication.Generally, radio communication device is registered to certain base station or access point 12-14 with from communication system System 10 reception business.For being directly connected to (that is, point to point link), radio communication device is through being divided The channel joined directly communicates.

Generally, base station for cell phone system (such as, Advanced Mobile Phone Service (AMPS), Numeral AMPS, global system for mobile communications (GSM), CDMA (CDMA), local multiple spot Compartment system (LMDS), multichannel multi-point distribution system (MMDS), enhanced data rates GSM evolution technology (EDGE), general packet radio service (GPRS), high speed downlink packet connect Enter (HSDPA), high speed uplink packet accesses (HSUPA and/or its modification), and similar type System, and wireless network (such as, IEEE802.11, the indigo plant that access point is in house or building Tooth, ZigBee, the procotol based on radio frequency of any other type and/or its modification). Independent of certain types of communication system, each radio communication device include built in radio device and / or it is coupled to radio device.Such radio communication device can be according to such as sending out at provided herein Bright various aspects operation, thus strengthen performance, reduction cost, reduction size and/or enhancing broadband and answer With.

Fig. 2 is the radio communication dress illustrating and including host apparatus 18-32 and associated radio device 60 The diagram of the embodiment put.For cell phone main frame, radio device 60 is build-in components. For personal digital assistant main frame, above-knee main frame and/or individual calculus machine host, radio device 60 Can be built-in or coupled outside parts.For access point or base station, parts are generally held in single knot In structure.

As it can be seen, host apparatus 18-32 includes that processing module 50, memory 52, radio connect Mouth 54, input interface 58 and output interface 56.Processing module 50 and memory 52 perform generally by The corresponding instruction that host apparatus completes.Such as, for cell phone host apparatus, processing module 50 Corresponding communication function is performed according to special cellular telephony standard.

Radio interface 54 allows to receive data and to radio device 60 from radio device 60 Send data (such as, inbound data), radio interface 54 provide data to processing module 50 so that Process further and/or route to output interface 56.Output interface 56 to such as display, monitor, The output display device of loudspeaker etc. provides connectivity, so that data accepted can show.Radio Interface 54 also provides data from processing module 50 to radio device 60.Processing module 50 can be from Such as the input unit of keyboard, keypad, microphone etc. receives outbound data through input interface 58, or Himself generates data.For the data received through input interface 58, processing module 50 can be with logarithm According to performing respective hosts function, and/or route it to radio device 60 via radio interface 54.

Radio device 60 includes HPI 62, baseband processing module 64, memory 66, many Individual radio frequency (RF) transmitter 68-72, transmitting/reception (T/R) module 74, multiple antenna 82-86, Multiple RF receiver 76-80, and local oscillator module 100.Baseband processing module 64, and is stored in Operational order in memory 66 combines, and performs digit receiver function and digit emitter respectively Function.Digit receiver function includes but not limited to that digital intermediate frequency arrives baseband-converted, demodulation, star Seat demapping (constellation demapping), decoding, release of an interleave (de-interleaving), soon Speed Fourier transformation, Cyclic Prefix are deleted, room and time decoding, and/or descrambling.As with reference to below Accompanying drawing in greater detail, digit emitter function include but not limited to scrambler, encode, interlock, Constellation mapping, modulation, an inverse fast fourier, Cyclic Prefix add, room and time coding and / or digital baseband to IF change.Baseband processing module 64 can use one or more processing means real Execute.Such processing means can be microprocessor, microcontroller, digital signal processor, miniature Computer, CPU, field programmable gate array, PLD, state machine, Logic circuit, analog circuit, digital circuit, and/or handle the signal (sum of simulation based on operational order / or numeral) any device.Memory 66 can be single memory device or multiple memory Device.Such storage arrangement can be that read-only storage, random access storage device, volatibility are deposited Reservoir, nonvolatile memory, static memory, dynamic memory, flash memories, and/or deposit Any device of storage digital information.Note when processing module 64 is through state machine, analog circuit, numeral Circuit and/or logic circuit implement in its function one or more time, depositing of storage respective operations instruction Reservoir embeds together with including the circuit of state machine, analog circuit, digital circuit and/or logic circuit.

In operation, radio device 60 receives outbound data via HPI 62 from host apparatus 88.Baseband processing module 64 receives outbound data 88, and produces one based on mode select signal 102 Individual or more outbound symbol stream 90.Mode select signal 102 occurs indicating at the end discussed in detail AD HOC (for example, it is possible to selecting to identify in table in associative mode).Such as, model selection letter Numbers 102 channel width (examples that may indicate that the frequency of 2.4GHz or 5GHz, 20 or 22MHz As, 20 or 22MHz wide channels), and the maximum bitrate of 54 megabits per second.Real at other Executing in mode, channel width can expand to up to 1.28GHz or wider, the maximum wherein supported Bit rate expands to per second 1 lucky position or bigger.In this typically classification, mode select signal will enter one Walk the special speed that the scope that indicates is from 1 megabit to 54 megabits per second per second.It addition, model selection letter Number indicate the particular type of modulation, its include but not limited to Barker code modulation, BPSK, QPSK, CCK, 16QAM and/or 64QAM.As same it should be understood that also supply code check is as every son The number (NBPSC) of the encoded position of carrier wave, the encoded position (NCBPS) of every OFDM symbol, The data bit (NDBPS) of every OFDM symbol.

Mode select signal can also indicate the particular channelization for associative mode.Certainly notice, In the case of without departing substantially from protection scope of the present invention and spirit, can use in other embodiments There is the other types channel of different bandwidth.Such as, alternatively, such as according to IEEE task groups ac (TGac VHTL6), can use and such as have 80MHz, 120MHz and/or 160MHz Other channels various of bandwidth.

Baseband processing module 64 is produced one or more based on mode select signal 102 by outbound data 88 Many outbound symbol stream 90.Such as, if mode select signal 102 is indicated as being the AD HOC selected Utilize single transmission antenna, then this baseband processing module 64 will produce single outbound symbol stream 90. Alternatively, if mode select signal indicates 2,3 or 4 antennas, then baseband processing module 64 2,3 or 4 outbound symbol stream 90 corresponding with the number of antennas from outbound data 88 will be produced.

Depend on the number of the outbound flow 90 produced by baseband processing module 64 so that corresponding number RF transmitter 68-72 can give and outbound symbol stream 90 is converted into departures RF signal 92.Launch/ Receiver module 74 receives departures RF signal 92 and provides each departures RF to respective antenna 82-86 Signal.

When radio device 60 is in the pattern of reception, transmit/receive module 74 is via antenna 82-86 Receive one or more inbound RF signal.T/R module carries to one or more RF receiver 76-80 For inbound RF signal 94.Inbound RF signal 94 is converted into corresponding number by RF receiver 76-80 Inbound symbol stream 96.The number of inbound symbol stream 96 (returns corresponding to the AD HOC receiving data Think that this pattern may refer to any pattern in bright model selection table).Baseband processing module 64 receives Inbound symbol stream 96, and convert thereof into inbound data 98, through HPI 62 to host apparatus 18-32 provides this inbound data 98.

In an embodiment of radio device 60, it includes transmitter and receiver.Launch Device can include MAC module, PLCP module and PMD module.Baseband processing module can be used 64 media interviews implemented control (MAC) module and are suitable to coupling, thus will according to WLAN protocol Medium Access Control (MAC) Service Data Unit (MSDU) is converted into Medium Access Control (MAC) Protocol Data Unit (MPDU).Can Coupling is suitable to physical layer convergence procedure (PLCP) module implemented in baseband processing module 64, Thus according to WLAN protocol, MPDU is converted into PLCP protocol Data Unit (PPDU).Thing Relevant (PMD) module of reason media is suitable to coupling, thus according to multiple operation moulds of WLAN protocol PPDU is converted into multiple rf signal, the most the plurality of operator scheme bag by formula Include multiple input and multiple output combination.

The embodiment of relevant (PMD) module of physical medium includes that error protection module, multichannel are divided Solve module and multiple directions modular converter.The error protection module can implemented in processing module 64 Be suitable to coupling to reconstruct PPDU(PLCP(physical layer convergence procedure) protocol Data Unit), thus Reduce the error of transmission producing error protection data.DeMux module is suitable to coupling with by error protection Data are divided into multiple error protection data stream.Multiple directions modular converter is suitable to coupling with by multiple mistakes Difference protection stream compression changes multiple rf signal into.

Those skilled in the art recognize the nothing that one or more integrated circuit can be used to implement Fig. 2 Line communicator.Such as, host apparatus can be implemented on an integrated circuit, baseband processing module 64 and memory 66 can implement on the second integrated circuit, and the nothing in addition to antenna 82-86 The remainder of line electric installation 60 can be implemented on the 3rd integrated circuit.As optional example, nothing Line electric installation 60 can be implemented on a single integrated circuit.As yet another embodiment, the place of host apparatus Reason module 50 and baseband processing module 64 can be the shared process dresses implemented on a single integrated circuit Put.Further, memory 52 and memory 66 can be at single integrated circuits and/or identical integrated The shared processing module of processing module 50 and baseband processing module 64 it is embodied as on circuit.

Fig. 3 is to illustrate the one or more various aspects according to the present invention and/or the access of embodiment The diagram of the embodiment of point (AP) and multiple wireless lan (wlan) device.According to this Bright various aspects, AP point 300 can be compatible with any number of communication protocol and/or standard, example Such as IEEE802.11(a), IEEE802.11(b), IEEE802.11(g), IEEE802.11(n). According to certain aspects of the invention, AP also support the previous version with IEEE802.11x standard to Rear compatibility.According to other aspects of the invention, AP300 supports with previously IEEE802.11x behaviour Make channel width, MIMO dimension and data throughput rate and wlan device that standard is not supported 302,304 communicate with 306.Such as, access point 300 and wlan device 302,304 and 306 Can support the channel width of previous version device, and from 40MHz to 1.28GHz and above Channel width.Access point 300 and wlan device 302,304 and 306 support 4 × 4 and bigger MIMO dimension.Due to these characteristics, access point 300 and wlan device 302,304 and 306 can support 1GHz and above data throughput rate.

More than one device in AP300 support and wlan device 302,304 and 306 is together Shi Tongxin.Communication simultaneously can be via OFDM tone assignment (such as, some in given cluster The OFDM tone of number), MIMO dimension multiplexing or other technologies service.Due to some Communicating, AP300 can be respectively allocated the one or more supports in its multiple antennas with the most every simultaneously Individual wlan device 302,304 communicates with 306.

Further, AP300 and wlan device 302,304 and 306 and IEEE802.11(a), (b), (g) and the back compatible of (n) operation standard.In supporting such backward compatibility, this Signal format that a little device supports are consistent with these prior operation standards and structure.

Usually, communication can be for by single receiver or multiple individual receivers as described in this Receive (such as, transmit via multi-user's multiple-input and multiple-output (MU-MIMO) and/or OFDMA, It is different from the single transmission with multiple receiver addresses).Such as, single OFDMA transmission makes By different tones or sets of tones (such as, cluster or channel) thus send different group information, this group Often group in information is transmitted to one or more receivers in the time domain simultaneously.Again, to a user The OFDMA transmission sent is equivalent to OFDM transmission, and (such as, OFDM can be shown as OFDMA Subgroup).Single MU-MIMO transmission can be included in the letter that the euphonic space of common group is different Number, each contain different information and each to one or more different receiver transmission.Some Single transmission can be the combination of OFDMA and MU-MIMO.Multi-user as described in this (MU) multiple user can be regarded as and share at least one cluster (such as, at least one frequency simultaneously At least one channel in Duan).

The mimo transceiver of diagram can include SISO, SIMO and MISO transceiver.For The cluster of such communication (such as, ofdma communication) can be that continuous print is (such as, mutually adjacent Connect) or discontinuous (such as, the protection of band gap being spaced apart).At different OFDMA clusters On transmission can be simultaneously or non-concurrent.Such radio communication device as described in this can Can support via single cluster or its any combination of communication.Legacy user and redaction user (such as, TGac MU-MIMO, OFDMA, MU-MIMO/OFDMA etc.) can give Fix time shared bandwidth, or they can be that different embodiment is dispatched at different time.Such MU-MIMO/OFDMA transmitter (such as, AP or STA) can be at single aggregation information bag Same cluster (such as, at least at least one frequency range in (such as, time-multiplexed) Individual channel) on to more than one reception radio communication device (such as, STA) transport packet.? In such example, whole communication links can need each to receive radio communication device (such as, STA) channel training.

Fig. 4 is the diagram of the embodiment illustrating radio communication device and cluster, and this embodiment can For the communication supported with at least one other radio communication device.It is, in general, that cluster can regard Make may be located at one or more wave band (part of the frequency spectrum such as, relatively large amount separated) In one or more channels (such as, frequency spectrum son divide part) in or this channel between such as Description for the Tone Map of OFDM symbol.Such as, the various channels of 20MHz may be located at In 5GHz frequency range or around this frequency range.Channel in any such frequency range can be continuous print (example As, adjoin each other) or discontinuous (such as, some protection intervals or band gap separating).Often, One or more channels may be located in given frequency range, and different frequency range need not have wherein phase Channel with number.Again, cluster may be generally understood between one or more frequency ranges Or any combination of more channels.Different frequency range can have different CH# as shown in Figure 4, OFDM tone can be distributed between 1+ cluster, cluster=fnc(1+CHs, 1+ frequency range, Or its any other combination) [such as, cluster 1(CH11, CH12, CH1x), cluster 2(CH11, CHa1), cluster 3(CH11, CH12, CH2x, CHax), etc.]

The radio communication device of this figure can be any type of in all kinds described here and/or Be equivalent described here (such as, AP, wlan device or while not limited to but be included in Fig. 1 Shown in device in other any radio communication devices, etc.).Radio communication device includes Multiple antennas, one or more signals can be from the plurality of sky alignment one or more reception radio communication Device is launched, and/or receives from other radio communication devices one or more.

Such cluster may be used for via various one or more selected antenna launch signal.Example As, different clusters is illustrated as using different one or more antennas to launch signal respectively.

Equally, note about some embodiment, general nomenclature can be used, wherein launch wireless Communicator (such as, it is WAP (AP), or relative to other wireless sites (STA) The STA operated as " AP ") initiate communication, and/or receive radio communication relative to several other Device (such as, be STA) operates as the radio communication device of network controller-type, and Supporting in such communication, this reception radio communication device (such as, being STA) is in response to transmission nothing Line communicator also cooperates therewith.Certainly, although launching radio communication device and receiving radio communication dress This general nomenclature put can be used to distinguish and filled by such different wireless communication in communication system Put the operation of execution, but in such communication system whole such radio communication devices it is of course possible to Support in communication system to other radio communication devices and two-way from other radio communication devices Communication.In other words, various types of transmitting radio communication devices and reception radio communication device are permissible All support in communication system to other radio communication devices with from other radio communication devices Two-way communication.It is, in general, that such ability as described in this, function and operation etc. can be applied In any radio communication device.The as provided herein various aspects of the present invention and principle and equivalent thereof May be adapted to various standards, agreement and/or recommended practice (include currently exploitation various standards, Agreement and/or recommended practice) in use, such as according to IEEE802.11x(such as, wherein x be a, B, g, n, ac, ad, ae, af, ah etc.) various standards, agreement and/or recommended practice.

Fig. 5 illustrates OFDM(OFDM) embodiment 500.OFDM modulation is permissible Regard as usable spectrum is divided into multiple narrow-band sub-carriers (such as, lower data rate carrier wave).Logical Often, the frequency response of these subcarriers is overlapping and orthogonal.Each subcarrier can use various Any technology in modulation coding techniques is modulated.

By transmitting while performing greater number narrowband carrier (or multi-tone), operate OFDM Modulation.Protection interval (GI) or guard space the most also use between various OFDM symbol, Thus attempt the ISI(intersymbol interference that will be able to be caused by the multipath effect in communication system) Effect minimize (this can be the most meaningful).It addition, CP(circulation Prefix) can also be used for allowing switching time (when jumping to new frequency range) in protection interval, and Help to maintain the orthogonality of OFDM symbol.It is, in general, that OFDM system design is based in communication Intrasystem desired delay spread (such as, the desired delay spread of communication channel).

In some instances, various radio communication devices may be embodied as support from various different situations, The communication that any monitoring in parameter etc. and/or sensing are associated, and carry to another radio communication device For such information.Such as, in some instances, radio communication device may be embodied as having with all Some features as similar in the wireless site (STA) in the environment of wireless lan (wlan) Intelligence instrument station (SMSTA), be still suitable to according to monitoring and/or sensing perform with one or more surveys Such communication that amount is associated.In some applications, such device can operate the most considerably lessly. Such as, when with the most such device battery saving mode (such as, sleep pattern, reduce functional behaviour Operation mode, reduce power mode of operation etc.) under period when comparing, operation period can be smaller The period of the device several percentages in such battery saving mode (such as, wherein).

Such as, such device only can wake up up from such battery saving mode thus perform some operation. Such as, such device can wake up up from such battery saving mode thus perform one or more parameter, The sensing of situation, constraint etc. and/or measurement.(such as, wherein device during such operation cycle It is not at battery saving mode), this device can also perform such information to another radio communication device (example As, access point (AP), another SMSTA, wireless site (STA), or as AP operation Such SMSTA or STA, etc.) transmission.Notice that such device can enter operation mould Formula, in the frequency different (such as, being more than) entering operator scheme execution transmission place from this device Frequency perform sensing and/or monitoring.Such as, such device can wake up up the number of times of certain number from And make continuous print each sensing and/or policer operation, and the such number obtained during these operate According to storing (such as, in the memory unit in device), and it is being exclusively used in data During the operator scheme subsequently of transmission, corresponding to multiple each sensing and/or multiple data of policer operation Part can be transmitted during being exclusively used in this operator scheme of data transmission.

Equally, noting in some embodiments, such device can include monitor and/or biography Sensor ability and wireless communication ability.In other embodiments, such device can connect and / or it is coupled to monitor and/or sensor, and it has been used for relating to the prison of this monitor and/or sensor Depending on and/or sensing operation radio communication.

The applied environment (application context) of this device can be specific, and these Some demonstrations of non-exhaustive embodiment provide a user with in the description illustrated below.Also note that In some application, some in device can be battery-operated, and wherein energy conversion and efficiency are permissible There is high importance.Can apply according further to intelligence instrument it addition, have the most such device The several application used；Such as, some radio communication device may be embodied as support honeycomb unloading and Other application of/unconventional or non-traditional association WLAN application.Some are applied particular for and refer to To according to and follow the IEEE802.11ah standard of current exploitation and use.

Noting the various aspects according to invention described herein and equivalent thereof, the present invention is the most permissible Be applied to include arbitrary number type of wireless communication device (such as, STA, AP, SMSTA and/or Its any combination, etc.) radio communication device, some desired embodiment to one or more Many SMSTA are used together and adjust especially.

The various positions that Fig. 6 is shown in the environment including building or structure are (internally and/or externally, On the ground and/or underground) in the embodiment 600 of several radio communication devices implemented.In the figure, Implement each radio communication device multiple, thus the information relating to monitoring and/or sensing is forwarded to one Particular wireless communication device, this particular wireless communication device can operate as manager, telegon etc., Such as can be implemented by access point (AP) or the wireless site operated as AP (STA).Typically In fact, such radio communication device may be implemented as performing the forwarding of several data, monitoring and/or feel Survey any operation in operation.Such as, in the environment of building or structure, can have and build to this Build several services that thing or structure provide, including natural gas service, electrical service, TV service, mutually The Internet services etc..Alternatively, each different monitors and/or sensor can be implemented throughout this environment, Thus performing to relate to monitoring and/or the sensing of parameter, this parameter is not specifically related to service.Real as some Example, motion detection, temperature survey (and/or other air and/or environment measurement) etc. can by Various positions and each the different monitor implemented for various purposes and/or sensor perform.

Each different monitors and/or sensor may be implemented as to manager/telegon wireless Communicator is wireless, and offer relates to the information of such monitoring and/or sensing function.As in some applications May desire to, such information can continuously, occasionally, provide off and on etc..It addition, because Manager/telegon radio communication device can guide each monitor/sensor to perform in the time subsequently Some correlation function, so at such manager/telegon of each different monitor/sensor Such communication between radio communication device can cooperate according to such two-way instruction.

The various positions (internally and/or externally, ground and/or underground) that Fig. 7 is shown in vehicle environment The embodiment 700 of several radio communication devices of middle enforcement.This figure illustrates with drawing can perform number The several different sensings implemented throughout the vehicles of any function in individual monitoring and/or sensing function Device.Such as, the operating characteristic associated from different mechanical parts is (such as, in the vehicles such as The temperature of any parts in several parts of engine, compressor, pump, battery etc., operating condition Deng) can all be monitored, and the information relating to this monitoring can be supplied to telegon/manager Radio communication device.

Fig. 8 is shown in the various positions of broad distributed industrial environments the several channel radios implemented The embodiment 800 of T unit.This figure draw ground illustrate can mutual very far off various positions Each several different sensor of middle enforcement.This figure relates to having seldom or not to be associated with The diverse location (internally and/or externally, on the ground and/or underground) of wireless communication infrastructure implement Several sensors.Such as, in the oil industry, each different pumps can be in the most remote position Implement, and attendant need different each position of physical access thus find out there various Equipment and the operation of parts.Manager/telegon radio communication device can be implemented in the vehicles, Or implement in the portable units such as laptop computer included in the vehicles, and at the vehicles Advance to implement during each respectively position with such sensing and/or supervising device.When manager/ Telegon radio communication device enters into the place of being substantial access to so that can support and each different sensings And/or during the radio communication of supervising device, the information relating to such monitoring and/or sensing function is permissible It is supplied to manager/telegon radio communication device.

Although having been provided for the various embodiment with demonstration respectively is that reader illustrates, but note Such application of anticipating is not exhaustive, and any environment in various applied environment can be carried out, So that one or more radio communication devices are implemented throughout region, so that these one or more channel radios T unit can provide information to manager/telegon radio communication device the most once in a while.Any such should With or communication system can operate according to the various aspects of the present invention and equivalent thereof.

Including including that only time in relatively small portion or percentage wakes up up, activate one or In all kinds communication system of the communication system of more radio communication devices, can be due to several reasons In any reason generation network coordinator (such as, access point (AP) or other network coordinator classes Type device) restart.Such as, power cycle or power failure can cause such restarting.At certain In a little examples, power failure can exceed the time period that can provide electric power via reserve battery, and If there is the transfer protection of unsuitable fault, then such device can experience restarts.It addition, Sometimes due to any reason included in several reasons of network operation, software upgrading etc., occur predetermined Or plan power failure.

Such as, at the environment of the wireless communication system according to the IEEE802.11ah operation developed Under, some embodiment imagines the substantial amounts of wireless site communicated with the single network telegon of only one (for example, it is possible to including thousands of STA, Intelligent instrument device etc.).Again, some embodiment party In formula, wherein can have the operability of the wide scope of various communicator.Such as, radio communication dress Some put may be at work, inertia, reduction function or sleep mould during the most of the time Formula, (such as, only wakes up up in some time so that they are the most exercisable devices thus carries out one Individual or the transmitting of more multi signal and/or reception).Under such applied environment, when such network is assisted When adjusting device (such as, AP) experience to restart, network coordinator (such as, AP) can be lost with several The association of these each radio communication devices, lose Timing Synchronization Function (TSF), lose each device Association ID(AID), lose the Traffic Indication Map (TIM) that associates with each device, and/or loss The session encryption key associated with each device.That is, each previously used relating attribute is such Restart the most no longer valid.

It addition, the device from the sleep awakening in relatively long period may be detectable network coordinator (example Such as, AP) such restart.Some device may be needed itself to repeat association, certification etc. with in communication Recover in system and carry out communication.It addition, invalid TIM bitmap may mislead some device unfortunately Operate in an undesired manner.Such as, after a reset, such network coordinator (such as, AP) May such restart send new beacon, management frame and/or other communication afterwards.But, if When such delivering, special device is in sleep, then this device is not known or not to be alerted this new Information (such as, beacon, management frame and/or other communication).

According in this operation restarted after generation, generally may for association, certification etc. (such as, The access of communication network is returned to for specific device) perform some step.Such as, in association request and It may happen that exchange in response.Also it is possible to generating means and/or user authentication, and it is likely to send out Raw key generates and distribution.For there being such operating procedure of device that network to be obtained accesses to spend The relatively great amount of time.It addition, depend on the certification mode used, it may be desirable to continue more than some seconds Each frame individual processes (such as, the most about 2 to 3 seconds).

For example, it is contemplated that instantiation, authenticated exchange has been measured in a specific Wi-Fi implements to be needed The each of relatively long period (such as, about 2.78 seconds) is continued in network coordinator (such as, AP) Association 28 Frame switch between individual radio communication device (such as, STA).This is from Local Area Network The beginning (alternatively, referred to as EAPOL-starts) of upper Extensible Authentication Protocol (EAP) starts to survey Amount is until EAP-is successful.

Again, as mentioned elsewhere herein, according to the IEEE802.11ah developed Some embodiment of exercisable Basic Service Set (BSS) can include substantial amounts of device.Consider Including the embodiment of 6000 Intelligent instrument devices, and assume that each device is association certification Average cost about 3 seconds, then be for completing the time of the association needs of the certification to these each devices About 6000 × 3 seconds=12.5 days, with by each intelligence instrument whole again additional (reattach, Again attachment) arrive BSS.Again, it is considered to include thousands of wireless device (such as, 6000 intelligence Instrument) the even optimal situation of the mode that is implemented, need almost within two weeks, to complete whole each Intelligence instrument adds again to the AP's in such BSS.Furthermore, it is noted that such consideration differs Fixed be used for explaining with after the restarting of AP with the heavy additional association carrying out this sampling device in BSS Access delay, it is derived from the flow of other non intelligent instrument, and/or extra power consumption.Worst case is in order to complete Become the most additional time that may spend considerably longer than two weeks that each intelligence instrument is whole.

As it would be appreciated, based on network coordinator (such as, AP) restart can occur several to have Evil effect.There may be the heavy losses of throughput performance, intelligence instrument relatively short wake up up and grow sleep The nonsteady behavior of dormancy time it may happen that, the most tediously long BSS can occur recovery time (by In network, the longest length of one's sleep of each device limits), and/or each client in network may be caused The power consumption of device increases.It addition, such restart after, reassign based on AIS, given AID Different device may be reassigned to unfortunately.Each device the most plural may Having the identical AID being assigned to there, this can become problem.

It is, in general, that should be by required minimum for processing this appropriately designed approach restarted Network management realizes high degree of availability.Several different embodiments presented herein and approach, one or More devices can be by another device (example in these several different embodiments and approach detection network As, network coordinator, AP etc.) restart.Equally, based on the various embodiments proposed and way Some in footpath makes Timing Synchronization Function (TSF) timer recover.It is also understood that by Some aspect that the presented herein mode that is implemented and approach provide is whole in allowing to avoid system Repeating in certification associates device, and allows also to the association at network coordinator (such as, AP) The recovery of attribute.In some embodiments, such as those embodiment party operated according to residential environment In formula, about 3 each intelligence instruments can be about each enforcement in each house, apartment etc..Such as, Three each intelligence instruments may be embodied as: the first intelligence instrument associated with power system is with natural Second intelligence instrument of gas induction system association, and the 3rd associated with water supply and/or sewerage system Intelligence instrument, is each respectively adapted to reach some purpose, such as income measurement.Certainly, different Less or more each intelligence that each embodiment can include associating with each house, apartment etc. Ammeter.It addition, the similar enforcement of intelligence instrument can also be without departing substantially from protection scope of the present invention and essence Implement about nature of business in the case of god.

Fig. 9 illustrates the embodiment 900 restarting detection of communicator.As visible about this figure, logical Cross it to make and see that a kind of mode restarted of network coordinator (such as, AP) is by assessment Or the value of monitoring TSF timer.Such as, it is less than previous TSF value based on given or current TS F value Identification, can detect and such restart.Such TSF timer can regard as in the network coordination The common BSS clock that device (such as, AP) maintains, and such TSF timer can be by 8 Byte time stamp field represents.When such network coordinator (such as, AP) starts for the first time, TSF timer starts from zero (0) counting.Such TSF timer is with the increasing of specific duration Add stepping (such as, the step-length of 1 μ s) to increase.Consider 8 byte TSF timers, TSF timer The wraparound (i.e. 585, after 000 year) in 580,000 5000 years.Equally, such network association Adjust device (such as, AP), after restarting, its each TSF timer reset is returned to zero every time.Dress Put and may be embodied as detecting that network is assisted when receiving TSF timer and being relatively shorter than next desired value That adjusts device (such as, AP) restarts (at least one times).In other words, the value of TSF timer should be big Little increase continuously, until its wraparound after about 585,000 years.If assessment the oneth TSF value, Then in the assessment of time after a while the 2nd TSF value so that the 2nd TSF value is relatively shorter than a TSF value, Restarting of network coordinator (such as, AP) so can be detected.Consider instantiation, if dress Put the very first time associated with network coordinator (such as, AP), this device identification be 1000 and The TSF value increased, and then close with network coordinator (such as, AP) in this same apparatus During second time of connection, TSF value is identified as 100 and is increasing by this device, then this spy Other device can detect that restarting of network coordinator (such as, AP) occurs the most.

Figure 10 illustrates the optional embodiment 1000 restarting detection of communicator.Consider TSF timing Device is in the very long duration (such as, about 585,000 year) of its wraparound, a possible reality Mode of executing operates by adding new count area of restarting to timestamp and/or TSF.In other words, Newer field can add timestamp and/or TSF to indicate the network coordinator occurred (such as, AP) number restarted.It is, in general, that can be such network coordinator (such as, AP) weight Open counting and distribute any position wishing number or byte.In a preferred embodiment, timestamp and / or 8 bytes of TSF in 1 be network coordinator (such as, AP) restart counting special also Use.Even consider that 7 byte TSF timers are (for example, it is contemplated that use one in byte for net Network telegon (such as, AP) restarts counting), 7 byte TSF timers of the most such amendment Only (that is, after 2280) wraparound in about 2280.In a possible embodiment, this The network coordinator (such as, AP) of sample restarts counting and/or TSF timer can maintain so Network coordinator (such as, AP) in implement nonvolatile random access memory (NVRAM) In, the most even in the case of hard electric power (hard power) fault, such information is the most permissible Retrieve the most therefrom.Using such approach, setter can be based on such network coordinator Restart the change of value in (such as, AP) count area, assisted by network by huge specific detection Adjust the number restarted that device (such as, AP) performs.

Recovering instruction about network coordinator, the network coordinator with associated apparatus is restarted, and then loses Lose BSS attribute.As described elsewhere herein, have and be may determine that by it and restart at least Two optional approach: restart meter by assessment TSF value or the network coordinator in TSF timer Digital section.

It addition, one or more newer fields or information element (IE) can be included in beacon thus table The bright information that can need to update from some communicator respectively.Such as, such information can be wrapped Include in beacon or in one or more new information element.Such as, many in the information of each type Individual may needs updates.TSF self may need to update, and this renewal can be that BSS is specific.Separately Outward, AID(its be that device is specific) can optionally update and/or reassign.Equally, target power Weight time (TWT) (although it is specific) can also optionally update and/or reassign.

Setter can receive wherein with the beacon recovering instruction from network coordinator.Extensive based on this Multiple instruction, this device can send recovery request action action frame to network coordinator.Based on such exchange, Network coordinator (such as, AP) can be that BSS updates TSF timer, then sends and recovers to ring Answer (such as, the confirmation to recovery request action action frame) to indicate each success that TSF timer updates Or failure.

Recover about the TSF timer associated with network coordinator, if such network coordinator By its TSF timer reset, then can have a large amount of device and (such as, apply in Intelligent electric phenotype In thousands of devices) lose some examples of time synchronized.Therefore, most in these each devices Number will wake up up in the incorrect time and lose beacon (it is generally at target beacon transmission times (TBTT) transmission).In other words, if setter is with synchronization based on previous TSF timer Based on wake up up, then there is the same network coordinator associated that resets with it of TSF timer wherein Restart after, the high likelihood occurred between the waking up up the most subsequently of this same apparatus.Therefore, In some embodiments, each device all must keep waking up up and wait until and next received letter Mark, or each respectively device is required for sending probe requests thereby to network coordinator.But, again, examine Consider the embodiment (such as, thousands of devices) with a large amount of device, it is possible to understand that if in system Interior each respectively device all operates according to which, then this can be inefficient or be not intended to 's.Instead, it not to update and the whole TSF timers associated in each device in network, But the TSF timer associated with network coordinator (such as, AP) can substitute for can be from Working as of the offer of in device in system (such as, providing from intrasystem next Rouser) Front TSF timer updates.

Figure 11 illustrates network coordinator (such as, access point (AP)) Timing Synchronization Function (TSF) The embodiment 1100 that timer recovers.Note typically quoting of network coordinator and/or AP permissible Do not lose general in the case of exchange use.Although noticing that AP is a class of network coordinator The instantiation of type, but by the case of without departing substantially from protection scope of the present invention and spirit wherein Typically use network coordinator, the embodiment party included herein wherein using AP can be revised alternatively Formula and/or diagram.

As visible about this figure, after AP completes to restart, the AP beacon associated with this leaves Time synchronized.In other words, AP is inaccurate knows your reset based on wherein TSF timer Send the beacon of AP.But, after given wireless device (STA2) wakes up up and loses beacon, Then this setter can keep waking up up until next beacon.Use appointing in approach in this paper What one determines or identifies ap reboot, and this device may determine that ap reboot counting and/or TSF are changed Become.Determine based on such, this setter can to AP send AP recovery request with update with The AP of TSF association.As response, AP can be recovered response (such as, confirming) transmission by AP Returning to have been provided that this device of AP recovery request, this AP recovery request indicates TSF meter in AP Time device update success or failure.As it will be appreciated such setter (such as, STA2) Waking up up but do not receive beacon in expeced time, therefore setter kept waking up up in the relatively long time. When finally receiving beacon from AP, AP beacon will indicate (1) AP restart (such as, based on Restart counting and therefore there is the loss related information relating to system each device interior), also indicate that (2) Need which information of one or more requests in intrasystem device (such as, STA).Such as it Be understood, such operation can complete to make AP to return to its original clock, therefore need not perform With whole (its number can be thousand of in some embodiments) in other difference devices in system Resynchronisation.In such enforcement, only AP need experience with its previously or original clock again with Step.

Therefore, just more another device (such as, STA1) when appropriate between properly wake up up thus Before ap reboot from AP receive beacon time, another subsequently device (such as, STA3) properly Time wakes up up to receive beacon from AP.But, this specific device (such as, STA3) it is also determined that Ap reboot counting change, and some update can about one or more device attributes with so AP recover occur together.

Figure 12 illustrates the embodiment 1200 of storage session encryption key.For avoiding repeating association and recognizing Card operation performs, in such AP can be system in NVRAM after each ap reboot Each storage some of which information in each associated apparatus.Such as, AP can be in NVRAM For each storage session encryption key (host session key) in each associated apparatus in system.This The operation of sample can eliminate and be derived from the needs that the uplink data of deciphering fault is retransmitted.Show in this figure The form gone out illustrates the embodiment of the possible size associated with different types of decruption key.

Figure 13 illustrates the embodiment 1300 that every relating attribute recovers.As it would be appreciated, several not Each same attribute can be from given intrasystem different each device association.For needs are stored in In AP, the amount of the information of (such as, wherein in NVRAM) minimizes, at every device of AP Attribute can recover from each respectively device.Such as, such relating attribute can relate to including target Weighted time (TWT), association ID(AID) and/or several parameters of any other parameter etc. in Arbitrary parameter.

Each device (such as, can be lost based on ap reboot count detection to AP lost condition Lose every relating attribute).In response to such detection, when recovering instruction request by AP, given dress Put and can send AP recovery request.When receiving such action action frame, AP can update these One or more in the value of attribute, or reassign with the one or more associations in these values new Value, and notify the specific device (such as, confirming) in AP recovers response frame.

In some embodiments, only TSF is not enough to show that AP has the most been restarted or restarted. Such as, owing to TSF can be recovered by relatively early device, therefore some embodiment can be preferably used Ap reboot counting (such as, such as with reference to described by Figure 10) shows that any of AP opens again Move or restart.Certainly, notice that each different enforcement can preferably show ap reboot or restart A kind of mode be better than another kind.

As understood about Figure 13, the recovery of every relating attribute is (such as, this demonstration embodiment party Formula uses AID) can hand over according to the AP recovery request between the setter in AP/response Change and make.Again, note that while that the recovery of AID describes with reference to this figure, but any desired often associate Attribute can use such approach to recover similarly.As visible about this figure, AP experience is restarted, Then AP one (such as, the next one wakes up STA up) device in system recovers TSF timing Device.In the beacon of transmission subsequently being derived from AP, and mark AP recovery expression at this (such as, Show the AID in a special embodiment).Setter wakes up up and is properly received beacon, really Determine AP the most restarted or restarted, and therefore ignore its Traffic Indication Map (TIM) position. What AP had the particular community (such as, AID) that associates with device has requested that recovery, then promotes Setter transmission is wherein with the AP recovery of this special attribute information (such as, its current AID) Request.In response to the information of this particular community provided in AP recovery request, may then pass through Accept the information (such as, accept to be derived from the current AID of STA) being included therein, or by for being somebody's turn to do Specific device reassigns new attribute (such as, reassigning new AID for this STA) and responds AP.

As understood about various accompanying drawings, embodiment etc., in this article, network coordinator (example Such as AP) restart and can cause the performance loss of other each devices in system and insecure operation. In this article, it has been suggested that several different approaches detection AP has the most been restarted or restarted, and the most Propose several different approaches, every device can be recovered with minimum downtime by these several different approaches Relating attribute.Ap reboot/restart and can use phase with so determining of every device relating attribute recovery Minimum network administration cost is realized.

As it would be appreciated, set forth herein communicator (such as, access point AP) restart or Reset can pass through its various approach determined, provides from such communicator including analyzing or receives Signal.Such as, the process in such communicator (such as, wireless site (STA)) Device can operate, thus (such as, Timing Synchronization Function (TSF) value in the first signal is different from Be less than) expection TSF value time, determine that another communicator has experienced and restart or reset.Alternatively, Processor in such communicator (such as, wireless site (STA)) is suitable to based on first Count value of restarting in signal determines that at least one optional equipment has experienced and restarts or reset.

Such as, receiver communicator (such as, STA) can from another communicator (such as, AP) communication is received.Then, analysis based on receiver communicator (such as, STA), permissible Assume that another communicator (such as, AP) has experienced to restart or reset.It addition, receiver communication Device (such as, STA) can check whether specific (single) position in this communication is set equally It is set to specific or predetermined value, thus indicates that this another communicator (such as, AP) is wished (at least One) receiver communicator (such as, STA) sends its each current TS F value to this another Communicator (such as, AP) so that this another communicator (such as, AP) can be each by it Individual TSF value resets to receive from this (at least one) receiver communicator (such as, STA) TSF value.

For example, it is possible to indicate 1 in this communication being derived from this another communicator (such as, AP) Position, thus show the TSF whether current sync of this another communicator (such as, AP).One A little annotations further are presented below, and another communicator the most such can be commonly referred to as AP, And one or more receiver communicators can be generally referred to as STA.IEEE according to current exploitation 802.11ah/TGah, has and plans that some times are to following non-Traffic Indication Map (TIM) power saving (PS) With target wakeup time (TWT) STA.After AP restarts, AP is that STA creates newly Planning, but non-TIM PS and TWT STA still uses old program operation.Equally, such AP Do not know how to avoid using the non-TIM PS and TWT STA of old planning information.By recovering TSF (such as, such as from the communication of be derived from STA) also uses old planning information, and AP then may be used To rebuild new planning around these STA.Therefore, detection AP has been restarted not necessarily in love in institute the most It is all enough under condition.Such as, replacing 8 restart counting and recover for TSF, 1 instruction can Signal AP TSF whether current sync being used for other STA in BSS.

It is set to so (single) of predetermined value (such as, 0 or 1, depend on desired enforcement) Position show AP be currently not TSF synchronize.If not setting this position, then AP from one or More STA ask TSF, this STA can select to send its each TSF, and STA to AP The TSF value not using AP corrects each TSF of their own.

AP can preserve every STA related information (such as, such as using safe key).Equally, AP can also be implemented as keeping old planning information.AP may be adapted to make it not notify to wake up up STA is to know its be covered (black out) (such as, reset or restart).It is also possible to preferably Be that such AP is not derived from the interference of first preplanning (such as, AP wishes to recover old planning also Keep using it).Equally, AP may need old TSF to avoid allowing STA know its (example that is covered As, AP needs old TSF heavily to use old planning).

Then such AP can use the such position asking old TSF to the STA waken up up.Base In this, such AP can correct new TSF value thus mate old TSF value.Find that this position is set Wake up up STA know its need not experience reassign, even if its find AP TSF be different from STA TSF(such as, AP TSF < STA TSF).Wake up up after a while STA by discovery expect TSF, and because of This correctly identification it/they need not again associate.Equally, find that the STA that position sets will not be known Its each local TSF.

Under AP loses the situation of every STA related information, then the equal wake operation of each SAT obtains Know that it needs to initiate association.Such as, each STA checks TSF and finds that AP TSF is different from STA TSF(such as, AP TSF < STA TSF).In some embodiments, if AP is TSF < STA TSF and do not set position, then STA initiates association.Therefore, AP restart reset TSF with STA is allowed to perform this test.In some embodiments, AP may be adapted to avoid it to have record Old wakeup time, and the fact that this can lose whole related information potentially with it differ Cause.AP can inquire old TSF to allow bias correcting, thus knows how old scheme adapts to work as Front TSF value, it is allowed to AP avoids covering old scheme with new departure.Such AP receives old TSF at it Time need not adjust the TSF restarted, and observing the STA set that puts in place, to need not revise it local TSF。

Figure 14 is the embodiment illustrating the method for operating one or more radio communication device Diagram.With reference to the method 1400 of Figure 14, by receiving the first letter from least one other communicator Number (such as, by operate communicator at least one communication interface) start the method 1400, As shown in square frame 1410.

By analyzing the first signal (condition 1) to have determined at least one other communicator the most Go through and restart or reset, and communicator is determined determining whether the first signal comprises by (condition 2) Time synchronous function (TSF) value request, continue method 1400, as shown in square frame 1420. If these conditions 1 and 2 all meet (such as, is determining that at least one other communicator experiences Restart or reset, and when determining that the first signal comprises the request of the TSF value of communicator), As shown in square frame 1430.

By generation, then method 1400 includes that the secondary signal being derived from the TSF value of communicator is grasped Make, as shown in square frame 1440.By operation communicator at least one communication interface with to This at least one other communication device transfers secondary signal, continues method 1400, as at square frame 1450 Shown in.

Should also be noted that various operations and the function of the various methods closed in this article description can be wireless Perform in communicator, such as, use the processor being implemented within, process circuit, Base-Band Processing mould Block and/or processing module, (such as, such as according to as with reference to the baseband processing module 64 described in Fig. 2 And/or processing module 50, its equivalent may be embodied as processor, processes circuit etc.) and/or wherein Miscellaneous part perform.Such as, such baseband processing module can generate as described herein Such signal and frame, and perform various operation as described in this article and analysis, or as at this Any other operation and function etc. described in literary composition, or their each equivalent.

In some embodiments, (it can be for such baseband processing module and/or processing module Same apparatus or separator are implemented) can be according to the various aspects of the present invention, and/or as herein Described in any other operation and function etc., or their each equivalent performs such process, To generate for using in any number of radio device and any number of antenna At least one is transmitted into another radio communication device, and (such as, it can also include any number of wireless At least one at least one in electric installation and any number of antenna) signal.Real at some Execute in mode, such place reason processing module in first device and the base band in the second device Processing module cooperation performs.In other embodiments, such process is completely by baseband processing module Or processing module performs.

As used in this article, term " basically " or " about " be its corresponding term and/ Or the relativity between article provides industry acceptable tolerance.Such industry acceptable tolerance scope From less than a percentage to 50 percentage, and corresponding to but be not limited to component values, integrated electricity Road technique change, temperature change, rising and falling time and/or thermal noise.Between article so Relativity scope from the difference of several percentages to difference in magnitude.As used equally at this, term is " suitable In being coupled to ", " being coupled to " and/or " coupling " direct-coupling of being included between article, and/or Through the INDIRECT COUPLING between article of intermediate items, (such as, article include but not limited to parts, unit Part, circuit and/or module), wherein for INDIRECT COUPLING, intermediate items do not revise signal information but Its current level, voltage level and/or power stage can be adjusted.As used further at this, push away Disconnected coupling (that is, one of them element is coupled to another element by deduction) with " being coupled to " phase Same mode is included in the directly or indirectly coupling between two article.As can be further at this Use, term " operable " or " being operably coupled to " show article include electrically connected, input, One or more in output etc., thus perform its corresponding function one or more when activating, and can To farther include the deduction coupling of other article one or more.As can be further made at this With, term " associates " the directly and/or indirectly coupling including discrete articles, and/or at another article The article being embedded in.As used at this, term " advantageously compare " show at two or More comparison between article, signal etc. provides desired relation.Such as, when desired relation it is When signal 1 has the amplitude bigger than signal 2, favorably comparing can be at the amplitude of signal 1 more than letter When numbers 2, or realize when the amplitude of signal 2 is less than the amplitude of signal 1.

As used equally at this, term " processing module ", " module ", " process circuit " and/ Or " processing unit " (such as, including various modules and/or circuit, such as can operable, enforcement And/or be used for encoding, for decoding, for Base-Band Processing etc.) can be single processing means or multiple Processing means.Such processing means can be microprocessor, microcontroller, digital signal processor, Microcomputer, CPU, field programmable gate array, PLD, state Machine, logic circuit, analog circuit, digital circuit, and/or hard coded based on circuit and/or operation Any device of signal (simulation and/or numeral) is handled in instruction.Processing module, module, place Reason circuit and/or processing unit can have associative storage and/or integral memory element, this storage Device can be single memory device, multiple storage arrangement, and/or this processing module, module, place Reason circuit and/or the embedded circuit of processing unit.Such storage arrangement can be read-only storage (ROM), random access storage device (RAM), volatile memory, nonvolatile memory, Static memory, dynamic memory, flash memories, and/or any device of storage digital information. Note that processing module, module, process circuit and/or processing unit include more than one processing means, So this processing means can be that centralized positioning is (such as, via bus structures wiredly and/or wirelessly Be directly coupled together), can be maybe Distribution and localization (such as, via the cloud computing of INDIRECT COUPLING, This INDIRECT COUPLING is via LAN and/or wide area network).If it is further noted that processing module, module, Process circuit and/or processing unit real through state machine, analog circuit, digital circuit and/or logic circuit That executes in its function is one or more, then the memory of storage respective operations instruction and/or storage element Part can be embedding together with comprising the circuit of this state machine, analog circuit, digital circuit and/or logic circuit Enter, or at this circuit external.Should further be noted that, memory component can store, and processes mould Block, module, process circuit and/or processing unit perform to show in one or more figure in the accompanying drawings The hard coded that at least some in the step gone out and/or function is corresponding and/or the instruction of operation.So Storage arrangement or memory component can be included in the commodity of manufacture.

The present invention is above by means of the method step of the execution that its concrete function and relation are described Describe.The border of these building blocks of function frames and method step and order arbitrarily determines at this so that description side Just.As long as concrete function and relation suitably perform, optional border and order i.e. can be defined.Any this The optional border of sample or order are therefore in the protection scope of the present invention required and spirit.Further Ground, the border of these building blocks of function frames the most arbitrarily defines to describe conveniently.If some notable function Suitably perform, i.e. can define optional border.Similarly, flowchart block can also be the most fixed at this Justice thus some critical function is described.For using, flowchart block border and order can use it He defines mode, and still performs some critical function.Building blocks of function frame and flowchart block and order Such optional definition therefore in the protection scope of the present invention required and spirit.Art technology Personnel also identify building blocks of function frame in this article and square frame, module and the parts shown in other are permissible Processor being embodied as discrete parts, special IC, execution appropriate software etc. or its any combination, Or it is real by discrete parts, special IC, the processor etc. of execution appropriate software or its any combination Execute.

The present invention at least partly can also describe according to one or more embodiments.The enforcement of the present invention Mode is used for the present invention, its aspect, its feature, its principle and/or the example are described in this article.Real The actual embodiment executing the equipment of the present invention, the commodity of manufacture, machine and/or process can include With reference to the aspect of one or more descriptions in embodiment discussed herein, feature, concept, example One or more in Deng.Further, from accompanying drawing to accompanying drawing, embodiment can be in conjunction with making By the function of same or similar name of same or similar reference number, step, module etc., and equally, Function, step, module etc. can be same or analogous function, step, module etc., or different Function, step, module etc..

In addition to concrete statement on the contrary, go to, be derived from accompanying drawing any in accompanying drawing provided herein Element, and/or the signal between this element can be simulation or numeral, continuous time or Discrete time, and single-ended or difference.Such as, if signal path is shown as single-ended path, So it also represents differential signal path.Similarly, if signal path is shown as differential path, then It also represents single ended signal paths.Although one or more special frameworks are described herein, but as by ability Field technique personnel recognize, can implement other frameworks equally, and this other framework uses and the most substantially shows One or more data/address bus that goes out, being directly connected to property between elements and/or between other elements INDIRECT COUPLING.

Term " module " uses in the description of the various embodiments of the present invention.Module includes function Block, this functional block is implemented thus to perform one or more functions of modules the most one or more defeated through hardware Enter the process of signal, thus produce one or more output signal.The hardware implementing module can be with self Operate together in conjunction with software and/or firmware.As used herein, module can contain self is the one of module Individual or more submodules.

Although the particular combination of the various functions of the present invention and feature is substantially discussed at this, but these functions With feature other combination be it is also possible that.The present invention is not limited by particular instance disclosed here, And substantially combine these other combination.

Claims (9)

1. a communication equipment, including:

At least one communication interface, receives the first signal from access point AP；And Processor:

Analyze described first signal and restart or multiple determining that described AP has experienced the most Position；

It is set to predetermined value based on the single position in described first signal, determines described Whether the first signal comprises asking of the Timing Synchronization Function TSF value to described communication equipment Ask；

When determining that described AP is restarted or resetted described in having experienced and described when determine When first signal comprises the described request of the described TSF value to described communication equipment, raw Become the secondary signal of the described TSF value comprising described communication equipment；And wherein:

At least one communication interface described transmits secondary signal to described AP；

Described communication equipment is a wireless site in multiple wireless site (STA) (STA)；

Before restarting or reset described in having experienced at described AP, the plurality of STA is according to One planning wakes up up respectively more than first target wakeup time (TWT)；And

After restarting or reset described in described AP has experienced, the plurality of STA is according to Two planning wake up up respectively at more than second TWT.

Communication equipment the most according to claim 1, wherein:

When TSF value in described first signal is different from expection TSF value, or based on institute Stating the count value of restarting in the first signal, it is described that described processor determines that described AP has experienced Restart or reset.

Communication equipment the most according to claim 1, wherein:

Described AP based on time reference generate described second planning, described time reference based on The described TSF value received from described communication equipment.

Communication equipment the most according to claim 1, wherein:

Described AP is based on described in being included in the described secondary signal of described communication equipment TSF value, resets or adjusts local TSF value therein.

5. a communication equipment, including:

At least one communication interface, receives the first signal from least one other communication equipment； And

Processor:

Analyze described first signal to determine that at least one other communication equipment described is No experience is restarted or is resetted, and determines whether described first signal comprises described logical The request of the Timing Synchronization Function TSF value of letter equipment；And

Determining that at least one other communication equipment described is restarted or multiple described in having experienced During position, and determining that described first signal comprises described in described communication equipment During the described request of TSF value, generate the described TSF value comprising described communication equipment Secondary signal；And wherein:

At least one communication interface described is at least one other communication device transfers described Binary signal；

Wherein, a radio station during described communication equipment is multiple wireless site (STA) Point (STA)；Restart described in having experienced at least one other communication equipment described or reset it Before, the plurality of STA plans more than first target wakeup time (TWT) according to first Wake up up respectively；And restart described in having experienced at least one other communication equipment described or multiple After Wei, the plurality of STA wakes up up at more than second TWT respectively according to the second planning.

Communication equipment the most according to claim 5, wherein:

When TSF value in described first signal is different from expection TSF value, or based on institute State the count value of restarting in the first signal, described processor determine described at least one additionally lead to Letter equipment is restarted or is resetted described in having experienced.

Communication equipment the most according to claim 5, wherein:

Being set to predetermined value based on the single position in described first signal, described processor is true Fixed described first signal includes the described request of the described TSF value to described communication equipment.

8. a communicator method of operating, described method includes:

Operate at least one communication interface of described communicator additionally to lead to from least one T unit receives the first signal；

Analyze described first signal so that it is determined that at least one other communicator described whether Experience and restarted or reset, and determined whether described first signal comprises described communicator The request of Timing Synchronization Function TSF value；

When restarting or reset described at least one other communicator described in determining having experienced, And determining that described first signal comprises described in the described TSF value to described communicator During request:

Generate the secondary signal of the described TSF value comprising described communicator；And

Operate at least one communication interface described of described communicator with to described extremely A few other communication device transfers secondary signal；

Wherein, a nothing during described communicator is multiple wireless site (STA) Line website (STA)；Restart described in having experienced at least one other communicator described Or before resetting, the plurality of STA wakes up up more than first target according to the first planning Time, (TWT) woke up up respectively；And at least one other communicator described After restarting described in experience or resetting, the plurality of STA plans second according to second Multiple TWT wake up up respectively.

Method the most according to claim 8, farther includes:

TSF value in described first signal be different from expection TSF value time, or based on Restart count value in described first signal, determine at least one other communicator described Restart described in experience or reset.