CN103533664A

CN103533664A - Method for enhancing communication capacity in WIFI (wireless fidelity) network

Info

Publication number: CN103533664A
Application number: CN201310494282.0A
Authority: CN
Inventors: 周贵祥; 文博; 魏伟; 高智慧; 刘二奇; 钱蒈; 胡伟
Original assignee: Nanjing Panda Electronics Manufacturing Co Ltd
Current assignee: Nanjing Panda Electronics Manufacturing Co Ltd
Priority date: 2013-10-21
Filing date: 2013-10-21
Publication date: 2014-01-22

Abstract

The invention discloses a method for enhancing the communication capacity in a WIFI (wireless fidelity) network. The method comprises the steps that firstly a WIFI access point receives a register from WIFI terminal equipment; the WIFI access point and the WIFI terminal equipment establish a real-time communication frame; active slot time of the communication frame is set to be used for the data package of audio data transmitted between the WIFI terminal equipment and the WIFI access point; a trigger is received from the WIFI equipment; cache audio data is provided to mobile equipment of a WIFI wireless network, wherein during configuring, the active slot time and other registered active slot time of a WIFI device are prevented from being overlapped. By adopting the method, the interference generated during data transmission of different WIFI equipment in the WIFI network can be effectively avoided.

Description

A kind of method that strengthens communication capacity in WIFI network

Technical field

The present invention relates to wireless communication field, specifically a kind of method that strengthens communication capacity in WIFI network.

Background technology

Wireless communication technology for user provides huge flexibility, comprises voice communication in communication aspects, Email, and video is communicated by letter with other transfer of data.Once cellular network was disposed and was convenient to voice communication widely, in recent years, the deployment of the technology based on 802.11 series standards, wireless communication technology presents the development of data-intensive form, and the place that user's notebook can cover at any wireless network is linked into data network by wireless aps access point.

802.11 wireless terminals are easily subject to the interference from other contiguous radio-frequency apparatus.Owing to just can transmitting a fixing frequency, can not configuration frequency diversity to avoid and the radio frequency interference that operates in another equipment of close frequencies; Simultaneously in 802.11 traditional standards, the transfer of data between WIFI equipment is not distributed specific time slot, and the continuity of signal, the transmission speed of data is not good enough, and can cause many generations between close WIFI equipment to be disturbed.Although utilize time diversity, can avoid the interference of a packets of audio data transmission retry sequence, but this retry may produce adverse consequences: for example, when two contiguous WIFI terminal equipments that operate have adopted a series of retry to avoid outside interference, total communication frame time may surpass 10ms, and causes the unstable of communication.

Summary of the invention

The problem interfering with each other between WIFI equipment close to each other while the object of the invention is for current wireless communication, provides a kind of and avoids interference in WIFI network, strengthens the method for communication capacity.

Technical scheme:

A kind of method that strengthens communication capacity in WIFI network, it is based on a WIFI access point and more than one WIFI terminal equipment, between WIFI access point and WIFI terminal equipment, by WIFI link, carry out transfer of data, it is characterized in that after the request of WIFI terminal equipment initiation real time communication, between WIFI access point and WIFI terminal equipment, by a series of real time communication frames that enliven time slot that comprise, carry out transfer of data, the structure of this communication frame comprises:

An above and non-overlapping copies enliven time slot, each enlivens the corresponding WIFI terminal equipment of time slot, described WIFI terminal equipment is enlivening time slot with capacity operation;

The period of service stop bits corresponding with enlivening time slot respectively, period of service stop bits signal is laggard enters sleep period to the WIFI terminal equipment in enlivening time slot receiving, and this WIFI terminal equipment keeps low or stand-by power consumption state in sleep period;

An instruction time slot, this instruction time slot is used for transfer instruction packet.

Enliven time slot and period of service stop bits in described communication frame are to send protocol configuration based on non-scheduled automatic energy saving.

As another kind, in enlivening the WIFI terminal equipment of time slot, enter the mode of sleep period, for the sleep triggered time of the WIFI terminal equipment configuration acquiescence of initiating communication request, the WIFI terminal equipment in enlivening time slot laggardly enters sleep period arriving the sleep triggered time.And this sleep triggered time is positioned at before the next one enlivens time slot.

WIFI access point and the corresponding time slot that enlivens of any WIFI terminal equipment are configured to allow the maximum reattempt times of transfer of data according to the size of data waiting for transmission and data transmission bauds by WIFI access point.

When WIFI access point is received the real time communication request that any WIFI terminal equipment sends, WIFI access point again based on non-scheduled automatic energy saving send agreement allotment put WIFI access point for before the enlivening time slot, period of service stop bits and acquiescence sleep triggered time of WIFI terminal equipment configuration.

Method of the present invention specifically comprises the following steps:

Step 1002.WIFI access point receives the registration of WIFI terminal equipment;

After step 1003. has been registered, judging whether WIFI access point receives the real time communication request that registered WIFI terminal equipment sends, otherwise proceed to step 1004, is to proceed to step 1005;

Step 1004.WIFI access point is not received the real time communication request that registered WIFI terminal equipment sends, between WIFI access point and WIFI terminal equipment, adopt 802.11 traditional communication patterns to communicate, in this communication process, when WIFI access point, receive after the real time communication request of registered WIFI terminal equipment transmission, enter step 1005;

Step 1005.WIFI access point is received after the communication request of registered WIFI terminal equipment transmission, is set up a real-time communication frame in the WIFI link between WIFI access point and WIFI terminal equipment;

The sleep triggered time that step 1006.WIFI access point enlivens time slot, period of service stop bits and acquiescence for sending the WIFI terminal equipment configuration of real time communication request, this WIFI terminal equipment enters waiting list, and WIFI access point data to be sent are positioned at the buffering area of WIFI access point;

WIFI terminal equipment of step 1007. is corresponding enliven time slot, period of service stop bits and acquiescence sleep triggered time configuration after, judge whether WIFI access point receives other WIFI terminal equipment registration request, be to proceed to step 1006, otherwise proceed to step 1008;

First WIFI terminal equipment in step 1008. waiting list enters and enlivens time slot;

The aforementioned WIFI terminal equipment of step 1012. enters and enlivens after time slot, receives a triggering signal of the data transmission of WIFI access point;

The aforementioned WIFI terminal equipment of step 1014. receives after triggering signal, and buffer data transmits by WIFI link between WIFI access point and aforementioned WIFI terminal equipment;

Step 1016. judges that in data transmission procedure whether aforementioned WIFI terminal equipment receives period of service stop bits, is to proceed to step 1018, otherwise proceeds to step 1020;

The aforementioned WIFI terminal equipment of step 1018. enters sleep period, proceeds to step 1022;

The aforementioned WIFI terminal equipment of step 1020. is not received the period of service stop bits that WIFI access point sends, and aforementioned WIFI terminal equipment arrives the sleep triggered time of acquiescence, proceeds to step 1018;

Whether the real time communication between the aforementioned WIFI terminal equipment of step 1022. and WIFI access point stops, and is to proceed to step 1023, otherwise proceeds to step 1008;

Whether the power supply of the aforementioned WIFI terminal equipment of step 1023. closes, and is to proceed to step 1024, otherwise proceeds to step 1004;

Whether the real time communication between all registered WIFI terminal equipments of step 1024. and WIFI access point all stops, and is to proceed to step 1025, otherwise proceeds to step 1008;

All whether all registered WIFI terminal equipments of step 1025. shutdown, is to finish, otherwise proceeds to step 1004.

Beneficial effect:

When 1, data are transmitted between WIFI access point and WIFI terminal equipment by WIFI link, registered WIFI terminal equipment is configured the corresponding different time slots that enlivens by WIFI access point, and each enlivens time slot non-overlapping copies.Because all registered WIFI terminal equipments have the active communication of one's own independently time slot in WIFI access point (AP) communication range, avoided the interference between different WIFI terminal equipments, strengthened communication capacity.

2, between WIFI mobile phone and AP by separately enliven the time slot frame of continuous transmission packets of audio data in turn, based on non-scheduled automatic energy saving, send agreement, the continuity of signal of communication has obtained enhancing, and the speed of transfer of data is improved, and has optimized the effect of transmission and the transmission of packet.

3, WIFI access point is the sleep triggered time of registered WIFI terminal equipment configuration acquiescence, and when the sleep that reaches acquiescence in enlivening the WIFI terminal equipment of time slot not receive period of service stop bits is during the triggered time, WIFI terminal equipment enters sleep period.Because sleep triggered time of this acquiescence is positioned at before the next one enlivens time slot, therefore guarantee, when WIFI access point and WIFI terminal equipment carry out transfer of data, to only have at most a WIFI terminal equipment to be positioned at active period.

4, the corresponding time slot that enlivens of WIFI access point and any WIFI terminal equipment is configured to allow the maximum reattempt times of transfer of data according to the size of data waiting for transmission and data transmission bauds by WIFI access point, guarantees that WIFI terminal equipment enlivens time slot capacity operation under own.

5, when WIFI access point is received the communication request of any WIFI terminal equipment transmission, WIFI access point readjust WIFI access point for before the enlivening time slot, period of service stop bits and acquiescence sleep triggered time of WIFI terminal equipment configuration, thereby guarantee that WIFI access point and all WIFI terminal equipments carry out whole efficiency and the stability of transfer of data.

Accompanying drawing explanation

The real time communication frame structure sending between Fig. 1 WIFI access point of the present invention and WIFI terminal equipment.

A kind of real time communication frame structure of Figure 1A embodiment 1.

A kind of real time communication frame structure of Figure 1B embodiment 2.

A kind of real time communication frame structure of Fig. 1 C embodiment 3.

A kind of real time communication frame structure of Fig. 1 D embodiment 4.

A kind of real time communication frame structure of Fig. 1 E embodiment 5.

The configuration of a kind of wireless network consistent with the present invention of Fig. 2.

The non-scheduled automatic energy saving transmission of U-APSD(of Fig. 3) execution mode.

Fig. 4 is a kind of for improving the step of WIFI real-time Communication for Power Network ability.

The step of the WIFI terminal equipment request registration that Fig. 5 is extra.

Embodiment

Below in conjunction with drawings and Examples, the present invention is further illustrated.

Communication frame structure 700 as shown in Figure 1, according to one embodiment of present invention.The duration of communication frame structure 700 is time intervals of fixing, repeat continuously, and this duration sets up by AP, is also to set up the time of 802.11 links with WIFI terminal equipment.The communication frame structure 700 of a WIFI system operates to produce and a series ofly at the first communication frame, finishes, and second communication frame starts continuous repeated communications frame.For example, if the duration of communication frame structure 700 is 10ms, in one minute, by 6000 a series of continuous data communication frames with communication frame structure 700, transmit voice communication data.In an embodiment of the invention, WIFI terminal equipment is WIFI mobile phone, and frame structure 700, simultaneously also can be for real-time video or other real time communication for establishing a communications link with the WiFi handset of voice communication.Time interval definition communication frame structure 700 can communicate by any WiFi handset associated with WIFI access point AP, and the time interval is 10 milliseconds, can be also 20 milliseconds or other duration.By setting up a fixing duration for communication frame structure 700, a WIFI access point AP can conveniently communicate by letter with more than one WIFI mobile phone simultaneously.Communication frame structure 700 comprises that mobile phone enlivens time slot 702.During mobile phone enlivens time slot or enlivens the time interval that time slot is corresponding, WiFi handset associated with AP can keep active state.Under active state, mobile phone can receive data, sends data, and can active interception data.After mobile phone is associated with AP employing communication frame structure 700, this AP can set up and communicate by letter with the mobile phone with communication frame structure 700, enlivens time slot to handset allocation simultaneously.

As shown in Figure 2, for the present invention based on WIFI system 800, WIFI terminal equipment 802 powers on, and is connected to extra IP network 811 is associated with AP 803.Power on and WIFI terminal equipment registration after, AP 803 and WIFI terminal equipment 802 can be set up 802.11 conventional communication modes.Periodicity at communication pattern in the past sends beacon, for example, every 600 milliseconds, to indicate the data of all bufferings between AP 803 and WiFi terminal equipment 802 whether will be sent out.At traditional communication pattern, WiFi terminal equipment can sending and receiving have the application data of substantive communicating requirement.After WIFI terminal equipment and AP803 registration, mobile phone 802 requests start real-time 802.11 communication patterns, and AP activates this communication pattern with the WIFI terminal equipment of filing a request by setting up a real time communication frame structure.Therefore, AP 803 communicates from WIFI terminal equipment 802 response request and with communication frame structure 700 forwarding informations.The user of WIFI terminal equipment uses interface (button of a WIFI equipment and keyboard) can initiate the request of a real time communication pattern.When WIFI system 800 has started a real time communication pattern, AP 803 distributes to WIFI terminal equipment 802 and enlivens time slot 702 and sleep period 704.When real time communication pattern starts, at each communication frame 700, WIFI terminal equipment 802 enlivens enlivening 702 li of time slots very much, i.e. capacity operation.In sleep period 704, this WIFI terminal equipment 802 remains on low or stand-by power consumption state, quits work.In one embodiment of the invention, enliven time slot 702 and sleep period 704 and send (U-APSD) agreement based on non-scheduled automatic energy saving.When WIFI terminal equipment 802 and AP803 registration, U-APSD needs work.

As shown in Figure 3, be the implementation method of a U-APSD.WIFI terminal equipment is WIFI mobile phone, enliven 902, one WIFI mobile phones of time slot can be at capacity operation.At uplink time slot 904, WIFI mobile phone can send data, and at downlink transfer time slot 906, WIFI mobile phone can receive data from AP.At moment E, WIFI mobile phone is received the period of service (EOSP) stop bits, triggers WIFI handset starting low-power consumption mode (entering sleep period), and whole sleep period 908 lasts till W constantly, and now, mobile phone resumes operation.

In conjunction with Fig. 1 and Fig. 3.Communication frame 700 adopts U-APSD method to produce and enlivens time slot 702 and sleep period 704.For example, if WIFI mobile phone 802 is assigned to, enliven time slot 702, the time interval 902 is corresponding to enlivening time slot 702, and the time interval 908 of stand-by power consumption is corresponding between sleep period 704 simultaneously.In every communication frame 700 time T 0, WIFI mobile phone 802 wakes up.When the request of WIFI mobile phone 802 with a real time communication of AP 803 initiations, wakeup time T0 can set up.AP803 can arrange the duration of communication frame 700, and indicates mobile phone 802 constantly to wake up in the time T 0 of every communication frame.WIFI mobile phone 802 can be stored this information, and simultaneously based on an internal clocking, the every 10ms of WIFI mobile phone 802 can oneself wake up.In an embodiment of the invention, stop the time slot that enlivens of WIFI mobile phone 702 at time T E, for example, WIFI mobile phone 802 receives ESOP position from AP803.Therefore, mobile phone 802 in each communication frame cycle corresponding with the time interval 704 in non-active state.

In another embodiment of the invention, the duration of enlivening time slot 702 can extend to T1 from moment T0, has represented and has distributed to enlivening the maximum duration that time slot 702 enlivens the time period of mobile phone.For example, at WIFI mobile phone 802, start in the pattern of real time communication with AP 803, AP 803 has distributed a wake-up period constantly at the T0 of each communication frame, and constantly enters sleep at T1.If WIFI mobile phone 802 does not receive ESOP position (or other trigger the state that finishes activation) from AP 803 in time T 1.Along with the power-off of equipment, WIFI mobile phone 802 can send pseudo-data and simulate ESOP position to codec.If the position of ESOP is received before T1, WIFI mobile phone 802 starts to enter low-power consumption or holding state in time T 2, and continues during sleep period 704.Therefore,, concerning mobile phone 802, sleep period 704 can change in every communication frame.

In enhancement mode communication between AP and WIFI mobile phone, the duration of enlivening time slot 702 is set as the repeating transmission voice of permission or the maximum of other data, and this is consistent with the demand of some control data of mobile phone quantity, data transmission rate and transmission of AP active communication.In other words, the duration of enlivening time slot 702 is set to provide and the maximum retransmission amount of enlivening the relevant WIFI mobile phone of time slot 702, and the foundation communication between an access point AP and any other active WIFI mobile phone, these WIFI mobile phones enliven time slot 702 and set be used for and other to enliven any other time slot that mobile phone communicates not overlapping in time.

In the communication frame structure 700 shown in Fig. 1, be equivalent to a single WIFI mobile phone and a structure of time slot that AP communicates.In one embodiment of the invention, the corresponding communication frame interval with 10 milliseconds of communication frame structure 700, the maximum duration of enlivening time slot 702 is equivalent to the time interval of approximately 6400 nanoseconds.Enliven 702 li of time slots, on the basis that is 11Mbps in message transmission rate, can implement the repeating transmission 5 times of audio data transmission, and allowing the confirmation that receives from the confirmation of AP time and stand-by period.Therefore, if necessary, enlivening time slot 702, mobile phone can be received and dispatched 5 times by data and be transferred to an AP.After packet successfully transmits, if do not have more data to be sent out from access point AP, WIFI mobile phone can receive the ESOP position confirmation that AP sends.For instance, with the speed of 11 Mbps, transmit, the duration that WIFI mobile phone wakes up enlivens time slot 702 at one and can bring up to about 6400 nanoseconds from about 700 nanoseconds, and this depends on the number of retries that sends packet.

Communication frame 700 also comprises order time slot 708, and this time slot is for send command packet between AP and WIFI mobile phone.

As shown in Figure 1A, WIFI terminal equipment is WIFI mobile phone to embodiment 1 in the present embodiment.Communication frame structure 720 is provided with two mobile phones and enlivens time slot 722,724 and instruction time slot 726.In this set, each enlivens time slot can be assigned to that an independent WIFI mobile phone is set up a regular interval and a common AP communicates.Therefore,, with reference to Fig. 2, WIFI mobile phone 802 can be initiated the request of real time communication with AP 803 registrations, and distributes and enliven time slot 722.Then mobile phone 804 can be registered, and requires real time communication, and designated mobile phone enlivens time slot 724, arranges

time slot

722 and 724 to make them not overlapping in time simultaneously.Therefore, communication frame structure Figure 1A of use can maintain the real time communication between two WiFi handsets and an access point AP.For example, the user of two WIFI mobile phones can keep with third party's audio call and hear the other side.

At the intervals of 10 milliseconds, can cushion and transmit the speech data that comes from each WIFI mobile phone, its enlivening in time slot separately, can not interfere with each other.Wherein, WIFI mobile phone enlivens time slot 722,724th, enlivens that principle that the communication frame structure 700 of time slot 702 describes operates according to WIFI mobile phone.Under actual conditions, in any given communication frame, each enlivens time slot 722,724 and can continue until the maximum time of enlivening and give tacit consent to.

The duration D of communication frame 720 is approximately 10 milliseconds, and the duration that mobile phone enlivens

time slot

722 and 724 is identical.T5 is the beginning that enlivens time slot 724 of second WIFI mobile phone constantly.Time interval TN need to meet two standards: the first, TN long enough enlivens time slot 722 with what hold first WIFI mobile phone, and under given message transmission rate of first WIFI mobile phone, this enlivens time slot can hold maximum reattempt times.The initial time T 5 of second WIFI mobile phone of the second, WIFI mobile phone activationary time section is set to maximum and changes transmission conditions.Particularly, when data transmission rate changes between WIFI mobile phone and AP or when extra mobile phone comes to life, T5 is set and makes it 720 li of communication frames, not need to change.Message transmission rate can change to 5.5 Mbps to 2Mbps from 11 Mpbs, and between T5 and T0 immovable relative time interval in the situation that, the multipotency of time slot that enlivens of WIFI mobile phone is increased to nearly six.

The present invention, by a regular time is provided for T5, when service conditions changes, minimizes interference volume by adjusting the position of the effective time slot of WIFI mobile phone.The duration of communication frame 720 is 10 milliseconds, approximately 3900 nanoseconds of time interval TN.Within 3900 nanoseconds of the time interval, can hold the effective time slot 722(724 of mobile phone with approximately 3100 nanoseconds of duration), these 640 voice packets for a standard with 11 Mpbs transmissions provide retry twice.In addition the duration, the effective time slot 722(of mobile phone and 724) can bring up to for approximately 3700 nanoseconds, and this provides retry twice for send the voice packets of 640 of a standard with 5.5 Mpbs.When transmission environment becomes noise or the appearance of the transfer of data between a WIFI mobile phone and AP mistake, need to transmit with lower speed, T0 and T5 at the fixing point of communication frame structure without any variation, by the reception of ESOP position, manage termination time T4 and the T6 of effective time slot 722 and 724, in this case, do not need to derive from the extraneous information of AP.In addition,, even without receiving ESOP position, access point is given respectively two WIFI mobile phone configuration sleep triggered time TM1 and TM2.In this case, with the speed of 11 Mbps, carry out transfer of data, acquiescence enters dormant time T M1, and TM2 can correspondence be arranged on T0,3100 nanoseconds after T5.When the message transmission rate with 5.5 Mbps, the sleep triggered time TM1 of acquiescence, TM2 can correspondence be arranged on T0,3700 nanoseconds after T5.In either case, need to be at the interior arrangement time slot of communication frame 720.

As shown in Figure 1B, WIFI terminal equipment is WIFI mobile phone to embodiment 2 in the present embodiment.Communication frame structure 740 is for the effectively distribution of time slot in the situation that four WIFI mobile phones and AP communicate is described.Communication frame structure 740 comprises that the mobile phone of Figure 1A enlivens time slot 722 and 724, and in this case, time slot 722 has kept the time interval identical in Figure 1A.Namely in Figure 1A, only have two WIFI mobile phones to be assigned with and enliven time slot, and there are four WIFI mobile phones to be assigned with in Fig. 2 B, enliven time slot.Figure 1B is in conjunction with Fig. 1, if WIFI mobile phone 802 be first and AP 803 registrations and distribute time slot 722, situation about describing in Figure 1B, mobile phone 802 is assigned with the time of enlivening, under 5.5 or 11 Mpbs, the total time delay of 10ms of communication frame 720 can be held 2 retries of transfer of data.Figure 1A and Figure 1B comparative descriptions, when the amount of enlivening WIFI mobile phone is increased to four from two, wakeup time T0 and T5 remain unchanged.If mobile phone 802 and 804 represents and first and second the registration WIFI mobile phone of AP 803, when new WIFI mobile phone 808,810 is associated with AP 803, wakeup time is identical.Yet, in this case, not having under the transfer of data of retry, the time slot width that mobile phone 804 enlivens time slot 724 and mobile phone 808 are the same with 744 with 810 time slot 742 is enough.Therefore, in this case, in order to hold two extra WIFI mobile phones, communicate, only need AP to reconfigure the sleep triggered time TM2 that second WIFI mobile phone enters sleep period.

As shown in Figure 1 C, WIFI terminal equipment is WIFI mobile phone to embodiment 3 in the present embodiment, has increased in the time slot configuration that two mobile phones enliven time slot 762,764 to Figure 1B.These two the new time slot correspondences of enlivening are assigned to five and six the WIFI mobile phone relevant with AP.In this case, the time slot 722 that enlivens of WIFI mobile phone 802 is adjusted to and is held only single transfer of data and without any retry by AP.T5 is arranged to enliven enlivening time slot and can holding approximately 11 and the message transmission rate of 5.5 Mbps of mobile phone at six, and T5 does not change in time interval TN.

Embodiment 4 is as shown in Fig. 1 D, and WIFI terminal equipment is WIFI mobile phone in the present embodiment.Communication frame structure 770 is compared with Figure 1A, and an extra mobile phone enlivens time slot 762 and is added in two situations in previous active mobile phone time slot 722,724, and data transmission rate also significantly reduces.For example, compare with the communication frame 720 in embodiment 1, on 770 li, communication frame structure, the configuration instruction message transmission rate of related time-slot reduces to 2 Mbps from 11, and has added the 3rd WIFI mobile phone and enlivened time slot.Again, the position of T0 and T5 is less than changing, so with reference to Fig. 2, the wakeup time of WIFI mobile phone 802,804 does not change.In this case, the time T M1 that enters sleep is enough, meets the retransmission time of the WIFI mobile phone 802 1 secondary data transmission of first registration.In addition, second WIFI mobile phone 804 and the 3rd WIFI mobile phone 806 enliven

time slot

724 and 742, can only hold respectively a transfer of data and without repeating transmission.

When WIFI mobile phone has stopped real time communication, AP can dynamically redistribute WIFI mobile phone and enliven time slot.Therefore,, as shown in Fig. 1 D and Figure 1A, when second WIFI mobile phone stopped real time communication, can reconfigure the communication frame structure of Fig. 1 D.At during telephone call, time slot 722,724, and 742 can be used for simultaneously for three WIFI mobile phones provide voice communication by a common AP.If at during telephone call, the on-hook of second WIFI mobile phone, signal is sent to AP and represents that time slot 724 is available.Therefore, time slot 724 can be redistributed into the 3rd the WIFI mobile phone with AP communication by AP.In addition, because AP knows, only have now two WIFI mobile phones in real time communication pattern, it can reconfigure time slot 724, and expands enlivening the maximum duration of time slot of being defined by TM2, and for example, TM2 is moved on a point, as shown in Figure 1A.In addition, the retry amount of the 3rd WIFI mobile phone can increase.If there is any extra WIFI mobile phone on-hook subsequently to add dialogue, enliven the distribution of time slot and can carry out as above Figure 1B and 1C, the 3rd old WIFI equipment is assigned to time slot 724 now.

When the time slot 722 of described the first priority becomes the free time, WIFI mobile phone is dynamically heavily distributed.Therefore, when first WIFI mobile phone on-hook during a public calling, second WIFI mobile phone can again be assigned to and enliven 722, and the 3rd WIFI mobile phone is reallocated the active time slot 724 to an expansion simultaneously, as shown in Figure 1A.

Embodiment 5 is as shown in Fig. 1 E, and WIFI terminal equipment is WIFI mobile phone.In the situation that a lower message transmission rate, communication frame structure 780 increases the 4th mobile phone and enlivens time slot 742.In this case, the time slot 722 of WIFI mobile phone 802 is adjusted makes to only have a single transfer of data to be received not have any retry.Yet as mentioned above, T0 and T5 remain unchanged.In reality, the sleep period of a WIFI mobile phone comprises a continual time interval, and what Figure 1A-1E represented is the time interval of the single communication frame of communication frame structure.Only have dormancy period by the equipment corresponding with enlivening time slot 722 to extend continuously (a rear communication frame of T6 or T0) and describe each communication frame.To an equipment corresponding with enlivening time slot 724, complete sleep cycle comprise occur in wake up before T5 the length of one's sleep section T0 and T5 between the part of extending, and the part that produces subsequent communication frames between sleep period between T6 and T0.

Fig. 4 illustrates a kind of for improving an illustrative steps in the enhancing communication capacity of WIFI network.In step 1002, when the terminal equipment of WIFI powers on, now from WIFI terminal equipment (mobile phone), receive a registration.When the elementary cell (AP) of a WIFI system receives a registration from WIFI terminal equipment, the elementary cell of WIFI mobile phone is in real time communication pattern, in each communication frame of WiFi handset, it wishes to adopt a kind of mechanism to distribute one to enliven time slot and sleep period.For example, WIFI terminal equipment can adopt non-scheduled automatic energy saving to send (U-APSD) mechanism and control active and sleep cycle.Then, in real time communication process, the communication of configuration elementary cell is to make trigger transmission work.

In step 1003, if also do not receive real time communication request, process and move to step 1004.

In step 1004,802.11 traditional communication pattern WIFI equipment are used non real-time communication application program.After registration, by tradition 802.11 data link with AP registration, WIFI terminal equipment can continue to receive data.

If in step 1003, from the WIFI mobile device of registration, receive real time communication request, real-time 802.11 communication patterns start, and in step 1005 and 1006, embody.In step 1005, set up a communication frame.

By AP, set up communication frame and facilitate swap data, as voice or audio stream.Communication frame, is characterized in that the transmission of the packet that communication frame interval is corresponding continuous, as shown in Figure 1.At WIFI mobile phone, as WIFI terminal equipment, be used as in the WIFI system of cordless telephone, a communication frame interval is corresponding with the time that sends continuously packets of audio data.In one embodiment of the invention, the time interval of this communication frame is 10 milliseconds.

In step 1006, in the communication frame that is about to wake up at first WIFI terminal equipment, the corresponding fixing point of wakeup time.For example, in call set-up time, it is also that first WIFI terminal equipment retains a wakeup time that an AP receives a call.After the wakeup time receiving, first WIFI terminal equipment can arrange an internal clocking that oneself wakes up in the wakeup time of each communication frame subsequently.In addition reflect that first WIFI terminal equipment at this point enters low-power consumption or holding state the length of one's sleep that, an acquiescence is set.Be used for defining the time slot that enlivens of an acquiescence length of one's sleep of wakeup time and acquiescence, it has defined long period of WIFI terminal equipment Operation at full power in communication frame.Therefore, in running, if first WIFI terminal equipment is received ESOP bit representation sleep pattern, do not start, in acquiescence, in the length of one's sleep, first each communication frame of WIFI terminal equipment enters low-power consumption or stand-by power consumption pattern.Therefore,, at each communication frame interval, enliven time slot with acquiescence corresponding in the time interval and make first WIFI terminal equipment operate in full power to transmit and receive data.In an embodiment of the invention, the actual duration of enlivening time slot can be according to the difference of U-APSD agreement discussed above and difference to some extent, but is no more than the duration of waking time slot up of acquiescence.Namely, the sleep triggered time can be based upon in the communication frame that the expection of each ESOP position is passed.Therefore, the sleep triggered time can be arranged on acquiescence before the length of one's sleep.Therefore, in each communication frame, first WIFI terminal equipment enliven time slot in the phase with capacity operation, in remaining communication frame interval operate power, reduce.And, arrange the time slot that enlivens of acquiescence, to wake time slot up not overlapping in time with other of the extra WIFI terminal equipment of any AP of being connected to.

In step 1007, if receive the request of an extra WIFI terminal equipment real-time mode, the method enters into the step 1104 of Fig. 2.

If under real-time mode, do not have extra request received, process and move to step 1008.In step 1008, a WIFI terminal equipment wakeup time arrives, and the method is transferred to step 1010.

In step 1010, WIFI terminal equipment is waken up.For example, WIFI terminal equipment wakes up based on internal clocking.When with this access point registration (associated), WIFI terminal equipment and AP exchange message arrange the wakeup time of each communication frame and each communication frame of WIFI terminal equipment.Therefore, WIFI terminal equipment knows that this is periodic wakeup, when internal clocking indication wakeup time arrives, can store and start predefined wakeup time.

In step 1012, receive the triggering that data are transmitted.Trigger can be the voice packet receiving from WIFI terminal equipment.

In step 1014, buffered data is passed to WIFI terminal equipment by WIFI link between WIFI terminal equipment and AP.During this transmission occurs in and enlivens time slot.Enlivening in time slot, equipment can sending and receiving from the data of AP.According to other parameters discussed above, can send packet enlivening in time slot repeatedly retry.

In step 1016, if WIFI terminal equipment receives an ESOP position, the method enters into step 1018.For example, after reception and transmission information, AP may represent that WIFI terminal equipment has successfully received data, and no longer sends data.

In step 1018, WIFI terminal equipment enters standby or low-power consumption mode.

If WIFI terminal equipment is not also received an ESOP position, the method moves to step 1020.In step 1020, if the sleep triggered time of acquiescence reaches, the method is transferred to step 1018.If also do not reach the default sleep triggered time, the method turns back to step 1016.

In step 1022, if real time communication is terminated between WIFI terminal equipment and AP, now registered WIFI equipment enters sleep period, and the method is transferred to step 1023.If also do not stopped with the real time communication of WIFI terminal equipment, process and turn back to step 1008, along with wakeup time arrives, will again wake WIFI terminal equipment up subsequently.

In step 1023, if the power supply of WIFI terminal equipment is closed, process and move to step 1024.If WIFI terminal equipment, still in "on" position, is processed and transferred to step 1004, now WIFI terminal equipment enters into 802.11 traditional communication patterns.

In step 1024, if while stopping with the WIFI terminal equipment real time communication of all registrations, process and move to step 1025.If real time communication does not stop, still have a plurality of WIFI mobile devices in real time communication pattern, process to transfer to step 1008 and circulate entering step 1008-1022.

In step 1025, if not the power supply of whole WiFi equipment, close, still the equipment in "on" position turns back to step 1004.Subsequently, this equipment can restart real time communication request, if all power-off of all devices, process finishes.

And said method can be applied between a plurality of WIFI terminal equipments and an AP communicate.The same time means, in the time interval of identical length, a plurality of WIFI terminal equipments and AP carry out alternately.Therefore, as long as enliven time slot, can use, Fig. 4 can method be applied to communicate by letter with a plurality of WIFI terminal equipments simultaneously, as above shown in Figure 1A-1E.

Fig. 5 represents the step when extra WIFI terminal equipment request registration, for strengthen the method for communication capacity a WIFI system.

In step 1102, it is the time slot that enlivens of an acquiescence of first WIFI terminal equipment reservation.For example, Fig. 4 as above, when the real time communication pattern of first WIFI terminal equipment starts, enlivening time slot can be retained.

In step 1104, after the real time communication pattern of second WIFI terminal equipment starts, be the time slot that enlivens that second WIFI terminal equipment retains second acquiescence.The time slot that enlivens of described first and second acquiescence does not have overlapping in time.

Therefore, first can initiatively communicate with AP with the WIFI terminal equipment of second, and can be not interfering with each other.When WIFI terminal equipment is separately during in active state, the first and second duration of enlivening time slot were similar to maximum retry and may be implemented.Therefore, the first and second acquiescences are enlivened the arranged spaced of wakeup time of time slot, make first acquiescence enliven time slot and provide maximum reattempt times for first WIFI terminal equipment.In one embodiment of the invention, within the time interval of approximately 10 ms communication frames, first and second WIFI terminal equipment enliven time slot and have used the message transmission rate of about 5-12 Mbps to hold retry twice.

In step 1106, if while not having the real time communication pattern of extra device request to start, process and move to step 1008.If while receiving the request of an extra real time communication pattern, transfer to step 1108.

In step 1108, at second, enliven the length of one's sleep of adjusting acquiescence on time slot.With reference to Figure 1A and Figure 1B, to enlivening time slot 724, the TM2 length of one's sleep of acquiescence is adjusted to a time early to hold other WIFI terminal equipment (the 3rd).After the acquiescence adjustment length of one's sleep, in the retry amount of enlivening the transfer of data of second WIFI terminal equipment within time slot 724, reduced.Yet the retry amount that offers first WIFI terminal equipment remains unchanged.

In step 1110, the 3rd acquiescence retaining for WIFI terminal equipment enliven time slot, the 3rd WIFI terminal equipment as shown in Figure 1B.In this case, in the 3rd retry amount of enlivening the 3rd WIFI terminal equipment of the registration in time slot, be not more than second WIFI terminal equipment.For example, peace ranked third to be enlivened time slot and makes it at unjustified second, enliven the time slot acquiescence length of one's sleep (seeing the TM2 of Figure 1A) before, but the controlled second acquiescence length of one's sleep (referring to the TM2 of Figure 1B) of enlivening time slot afterwards.

In step 1112, if do not receive the request of extra equipment real time communication pattern, transfer to step 1008.If while receiving an extra real time communication mode request, transfer to step 1114.

In step 1114, be the 4th WIFI terminal equipment retain the 4th acquiescence enliven time slot, as shown in Figure 1B the 4th WIFI terminal equipment.In this case, the 4th the retry amount of enlivening the 4th WIFI terminal equipment of time slot registration, be not more than second WIFI terminal equipment.

In step 1116, if while not receiving the request of extra equipment real time communication pattern, process and move to step 1008.If while receiving an extra real time communication mode request, transfer to step 1118.

In step 1118, adjust the length of one's sleep that first enlivens the acquiescence of time slot.In Figure 1B and 1C, the TM1 length of one's sleep of the acquiescence of time slot 722 is adjusted to a time early, to adapt to, holds the 5th the WIFI terminal equipment adding.As shown in Figure 1 C, after the adjustment of the length of one's sleep of acquiescence, the retry amount of the transfer of data of first WIFI terminal equipment reduces.

In step 1120, be the time slot that enlivens that the 5th WIFI terminal equipment retains the 5th acquiescence, as the 5th of Fig. 1 C the WIFI terminal equipment.The retry amount of the 5th the WIFI terminal equipment of registering in the 5th is enlivened time slot in this case, is not more than other WIFI terminal equipments.

In other execution mode of the present invention, the method in figure shown in 5 can expand to hold more WIFI equipment, and in Fig. 1 C, 6 are enlivened time slot and can be used to set up and communicate by letter with six WIFI terminal equipment equipment simultaneously.

According to the method for Figure 4 and 5, when first WIFI terminal equipment is initiated the demand of real-time mode between a WIFI terminal equipment and AP, the amount of redundancy of communication (retry) is preferentially given.This provides the communication quality strengthening for a WIFI terminal equipment, still allows other equipment and the AP to link in real time communication pattern simultaneously.Therefore, when more than one WIFI terminal equipment need to be linked to a single active call, AP can merge voice data, and WIFI terminal user can listen to and talk mutually like this.The method also provides a kind of mechanism, to guarantee that a plurality of WIFI terminal equipments (every 10 milliseconds) on real-time basis can receive and send data, and needn't spend the unnecessary time, intercepts the data of importing at full power state.In addition, because all registered WIFI terminal equipments have the active communication of the time slot alone that belongs to themselves in AP communication range, the WIFI equipment of a registration based on 802.11 communication protocols may cost less time remove Traffic Announcement, otherwise it presents the active period of the WIFI terminal equipment in registration.

In addition, accompanying drawing 1-1E as discussed above, when the quantitative change of WIFI terminal equipment, telecommunication management has been simplified in the required minimum configuration that enlivens time slot.

The part that the present invention does not relate to all prior art that maybe can adopt same as the prior art is realized.

Claims

1. a method that strengthens communication capacity in WIFI network, it is based on a WIFI access point and more than one WIFI terminal equipment, between WIFI access point and WIFI terminal equipment, by WIFI link, carry out transfer of data, it is characterized in that after the request of WIFI terminal equipment initiation real time communication, between WIFI access point and WIFI terminal equipment, by a series of real time communication frames that enliven time slot that comprise, carry out transfer of data, the structure of this communication frame comprises:

2. a kind of method that strengthens communication capacity in WIFI network according to claim 1, it is characterized in that in described communication frame enliven time slot and period of service stop bits is to send protocol configuration based on non-scheduled automatic energy saving.

3. a kind of method that strengthens communication capacity in WIFI network according to claim 1, it is characterized in that for initiating the sleep triggered time of the WIFI terminal equipment configuration acquiescence of real time communication request, the WIFI terminal equipment in enlivening time slot laggardly enters sleep period arriving the sleep triggered time.

4. according to a kind of method that strengthens communication capacity in WIFI network described in claim 2 or 3, it is characterized in that WIFI access point and the corresponding time slot that enlivens of any WIFI terminal equipment are configured to allow the maximum reattempt times of transfer of data according to the size of data waiting for transmission and data transmission bauds by WIFI access point.

5. according to a kind of method that strengthens communication capacity in WIFI network described in claim 2 or 3, it is characterized in that when WIFI access point is received the real time communication request that any WIFI terminal equipment sends, WIFI access point again based on non-scheduled automatic energy saving send agreement allotment put WIFI access point for before the enlivening time slot, period of service stop bits and acquiescence sleep triggered time of WIFI terminal equipment configuration.

6. according to claim 1 any strengthens the method for communication capacity in WIFI network, it is characterized in that it specifically comprises the following steps: