CN102349340A - Method and device for transmitting and receiving data in wireless network - Google Patents

Method and device for transmitting and receiving data in wireless network Download PDF

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Publication number
CN102349340A
CN102349340A CN2010800116366A CN201080011636A CN102349340A CN 102349340 A CN102349340 A CN 102349340A CN 2010800116366 A CN2010800116366 A CN 2010800116366A CN 201080011636 A CN201080011636 A CN 201080011636A CN 102349340 A CN102349340 A CN 102349340A
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China
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channel
packet
used
time
data
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CN2010800116366A
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Chinese (zh)
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CN102349340B (en
Inventor
金重宪
全范镇
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Lg电子株式会社
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Priority to US18520709P priority Critical
Priority to US61/185,207 priority
Priority to KR10-2009-0098260 priority
Priority to KR1020090098260A priority patent/KR101567829B1/en
Application filed by Lg电子株式会社 filed Critical Lg电子株式会社
Priority to PCT/KR2010/001070 priority patent/WO2010143804A1/en
Publication of CN102349340A publication Critical patent/CN102349340A/en
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Publication of CN102349340B publication Critical patent/CN102349340B/en

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Abstract

A method for transmitting data in a transmitting device of a wireless network comprises transmitting one or more data packets to a receiving device via a reserved region comprising channel resources allocated by a coordinator, and transmitting channel time extension information for requesting channel time extension to the receiving device, in order to transmit the data packets on an unreserved region in which the coordinator does not allocate channel resources to any devices.

Description

The method and apparatus that in wireless network, transmits and receive data

Technical field

The present invention relates to wireless network, and more specifically, relate to and be used for the method and this equipment that transmit and receive data between the equipment of wireless network belonging to.

Background technology

Recently; Developed bluetooth or wireless personal area network (WPAN) technology, this technology is used between relatively small number purpose digital device, setting up wireless network so that exchange audio or video data such as the confined space of family or small-scale office.WPAN can be used near relatively distance exchange message between relatively small number purpose digital device so that be implemented between the digital device low-power consumption with communicate by letter cheaply.The IEEE 802.15.3 of approval on June 12nd, 2003 has defined wireless MAC control (MAC) and physical layer (PHY) standard that is used for high speed wireless personal territory network (WPAN).

Fig. 1 is the view that the ios dhcp sample configuration IOS DHCP of WPAN is shown.

As shown in Figure 1, WPAN is the network of between such as the personal device in the limited space of family, setting up, and equipment can directly communicate each other, so that between using, interruptedly do not set up network and exchange message.

With reference to figure 1, WPAN is made up of two or more subscriber equipmenies 11 to 15, and in this equipment one operates as telegon 11.This telegon 11 is used to provide the basic timing of WPAN, and is used to control service quality (QoS) demand.This example of equipment comprises all digital devices, such as computer, PDA(Personal Digital Assistant), notebook computer, digital television, camcorder apparatus, digital camera, printer, microphone, loud speaker, headphone, barcode reader, display and mobile phone.WPAN is self-organizing network (hereinafter, being called " piconet "), and it is not designed in advance and set up, but under the situation of the help that does not have central foundation structure, sets up where necessary.To describe the process of setting up a piconet in detail now.When the particular device that can be used as the telegon operation was carried out the function of telegon, this piconet was started.Before new piconet was started, perhaps with before existing piconet is associated, all equipment was carried out scanning.Scanning refers to collect with the information of storing relevant channel at the equipment place and determine whether to exist the process that has piconet now.The equipment that receives the instruction be used to start piconet from the upper strata with under the situation that the piconet of previous foundation is associated is not being set up new piconet.This equipment selects to have the channel that still less disturbs based on the data that obtain through scanning process, and comes broadcast beacon via selected channel, thereby starts this piconet.This beacon is the control information by telegon broadcasting so that the information that control and management are associated with piconet, such as timing allocation information with relevant in piconet the information of other equipment.

Fig. 2 shows the example of the superframe that in piconet, uses.The timing controlled of this piconet is based on the superframe execution basically.

With reference to figure 2, each superframe starts from from the beacon of telegon transmission.Competition access period (CAP) is used to make the equipment use to send the mandator asynchronous data based on the method for competition.The channel time allocation cycle can comprise management channel time block (MCTB) and channel time blocks (CTB).MCTB is can be between telegon and the equipment or cycle of between equipment and equipment, sending control information, and can be between equipment and the telegon or between different equipment, to send CTB be asynchronous or the cycle of synchrodata.In each superframe, the number of CAP, MCTB and CTB, length and position are confirmed by telegon, and are sent to other equipment in the piconet via beacon.

When the particular device in piconet need send to data telegon or another equipment; This equipment is made the request for the channel resource that is used for transfer of data to telegon, and this telegon is given the equipment in the available channel resources scope with channel resource allocation.If CAP is present in superframe, and telegon accepts transfer of data in CAP, then this equipment therein telegon do not have to send a spot of data via CAP under the state of allocated channel time.

If the number of equipment is very little in piconet, the channel resource that then is used to make equipment can send data is enough, and therefore in channel resource allocation, does not go wrong.Yet; If the number of equipment is very big; And therefore channel resource is not enough; If perhaps the number of equipment is very little; But particular device continues to occupy channel; So that send such as the mass data that moves image, even then when other equipment has the data that will send, this channel resource also possibly not be assigned to other equipment.Therefore, communication is impossible.In addition, though distributed channel resource, the channel resource amount maybe be less than data quantity stored.

Therefore, carrying out between equipment, carrying out the research of the method for two-way communication smoothly.

On wireless video regional network (WVAN), telegon should be to the predetermined channel resource amount of devices allocation, so that data are sent to another equipment.Some channel resources can specified and use to acceptance by the equipment of the channel resource that telegon distributes.If channel resource is by provisional division, wherein particular device is accepted and is used the cycle of the channel resource that is distributed by telegon to be called as reserved area.

Usually, necessary channel resource amount is specified and asked to transmitting apparatus based on the data volume that will transmit when the request telegon made for channel resource allocation.But in the data transmission procedure of reality, loss of data or error in data possibly take place.In this case, when transmitting data via reserved area, the transmission quantity of expectation is unsatisfactory, and remaining data transmit via the zone that the next one is reserved.Therefore, data transmission period is postponed.

In addition, when receiving equipment reproduced the data that receive, the time quantum or the recovery time of carrying out buffer memory possibly be increased.In addition, if transmitting apparatus is not accomplished transfer of data in the channel resource that is distributed by telegon, and telegon is made the additional request for channel resource allocation, then scheduling channel resource or the unnecessary process of setting up channel resource increase once more.

Summary of the invention

Technical problem

Therefore, the present invention is directed to a kind of method and apparatus of transmitting and receive data at wireless network of being used for, this method and apparatus has been eliminated the one or more problems that cause owing to the restriction of prior art and shortcoming basically.

The object of the present invention is to provide a kind of in wireless network to the equipment method of allocation of channel resources may effectively; And more specifically; A kind of method; This method utilizes non-reserved area as reserved area, makes to make the non-reserved area of having been used by particular device can be used for particular device according to the method based on competition between the equipment.

Another object of the present invention is to stand and can under the situation of any intervention that does not have telegon, expands CTB (channel time blocks) the entering back non-channel reservation time of transmission through current appointment, makes the station to use and is used for extra time such as re-transmitted, wave beam search, bi-directional data transmission etc.

Other advantages of the present invention, purpose and characteristic will be set forth in the following description to a certain extent, and will be conspicuous to those skilled in the art when consulting following content, perhaps can put into practice acquistion from of the present invention.Through the specification of writing with and claim and accompanying drawing in the structure specifically noted, can realize and obtain the object of the invention and other advantages.

Solution to problem

For realize these purposes with other advantage and according to the object of the invention; Like enforcement and broadly described herein; A kind of method that is used for sending data at the transmitting apparatus of wireless network; Comprise: at the channel reservation time durations that distributes by telegon; Sending at least one data to receiving equipment divides into groups; And the information that will be used for channel time expansion sends to receiving equipment, to send packet at non-channel reservation time durations.

The non-channel reservation time is the channel time that telegon is not distributed to any equipment.And this reservation or non-channel reservation time comprise at least one channel time blocks.

According to embodiments of the invention, when at the channel reservation time durations, the transmission of at least one packet imperfect tense, the information that will be used for the channel time expansion sends to receiving equipment.

According to embodiments of the invention, the information that is used for the channel time expansion is included in the last packet of at least one packet of channel reservation time durations transmission.The information that is used for the channel time expansion is included in media interviews control (MAC) header that final data divides into groups.

According to embodiments of the invention, the information that is used for channel time expansion (CTE) is to be set to 1 CTE bit.Then, receiving equipment continues monitored data and divides into groups, and after receiving the CTE bit, does not switch to resting state.

The method that is used to send packet according to an embodiment of the invention may further include: at non-channel reservation time durations, send packet to receiving equipment.This packet is sent out under the situation of any intervention that does not have telegon, and comprises second information that is used for the channel time expansion.

The method that is used to send packet according to an embodiment of the invention may further include: begin beam forming process at non-channel reservation time durations, perhaps beam forming process is expanded to the non-channel reservation time.

According to embodiments of the invention, on two-forty physics (HRP) channel, send the information and at least one packet that are used for the channel time expansion.

The method that is used to transmit packet according to an embodiment of the invention may further include: in response at least one packet be used for the information of channel time expansion, on low-rate physical (LRP) channel, receive ACK from receiving equipment and divide into groups.

In another aspect of the present invention, a kind of method that is used for sending data at the transmitting apparatus of wireless network, this method comprises: at the channel reservation time durations that is distributed by telegon, send at least one data to receiving equipment and divide into groups; And send and indicate transmitting apparatus whether channel time need be expanded to the designator of non-channel reservation time.

According to embodiments of the invention, the designator that is used for channel time expansion (CTE) is to be set to 1 CTE bit.Then, this receiving equipment continues monitored data and divides into groups, and after receiving the CTE bit, does not switch to resting state.

According to embodiments of the invention, the designator that is used for channel time expansion (CTE) is to be set to 0 CTE bit.When transmitting apparatus did not need further channel time to expand, the CTE bit was set to zero.And, in case sending ACK in response to the packet that comprises this designator, receiving equipment divides into groups, receiving equipment continues no longer to continue to monitor to divide into groups, and switches to resting state.

In another aspect of the present invention; A kind of transmitting apparatus that is used for sending data at wireless network; Be used at channel reservation time durations by the telegon distribution; Sending at least one data to receiving equipment divides into groups; And send the information that is used for the channel time expansion to receiving equipment, to send packet at non-channel reservation time durations.

According to embodiments of the invention, the non-channel reservation time is the channel time that telegon is not distributed to any equipment.

According to embodiments of the invention, reservation or non-channel reservation time comprise at least one channel time blocks.And the information that is used for the channel time expansion is included in the last packet of at least one packet of sending during the channel time of reservation.

In another aspect of the present invention, a kind of method that in the receiving equipment of wireless network, receives data comprises: the channel reservation time durations in that telegon distributes receives at least one data from transmitting apparatus and divides into groups; Receive the information that is used for channel time expansion (CTE) from transmitting apparatus; And after the information that receives CTE,, receive packet from transmitting apparatus at non-channel reservation time durations.

According to embodiments of the invention, the non-channel reservation time is the channel time that telegon is not distributed to any equipment.

According to embodiments of the invention, reservation or non-channel reservation time comprise at least one channel time blocks.And when at the channel reservation time durations, the reception of at least one packet imperfect tense receives the information that is used for the channel time expansion from transmitting apparatus.

According to embodiments of the invention, packet is received under the situation of any intervention that does not have telegon.

In addition, the information that is used for channel time expansion is included in the last packet of at least one packet that the channel reservation time durations receives.

In another aspect of the present invention; A kind of receiving equipment that is used for receiving data with wireless data; This receiving equipment is used for receiving at least one data at the channel reservation time durations that is distributed by telegon from transmitting apparatus and divides into groups; And after the information that receives CTE; At non-channel reservation time durations; Receive the information that is used for channel time expansion (CTE) from transmitting apparatus, and receive packet from transmitting apparatus.

Beneficial effect of the present invention

According to one embodiment of present invention; When in wireless video regional network (WVAN), between equipment, sending or receiving data; Through with the part of the non-reserved area of this channel resource as reserved area, can use the channel resource that distributes by telegon effectively.According to one embodiment of present invention; If will send the desired data amount of the discontented foot channel of the transmission equipment of data by the reserved area transmission of the channel resource of telegon distribution; Then transmit remaining data, thereby reduced the data transfer delay time via the non-reserved area after preparatory zone.

In addition, being used for reproducing the cache-time that data consumed by the receiving equipment that receives data can be shortened.

According to one embodiment of present invention; Under situation about not making to the request of the individual channel resource allocation of telegon; This transmission equipment can come implementation via non-reserved area, such as data transmission procedure or wave beam search procedure, so that channel resource is perhaps set up in scheduling once more.

Should be appreciated that general introduction and following detailed description above of the present invention is exemplary and indicative, and be intended to provide the of the present invention further explanation that requires protection.

Description of drawings

Accompanying drawing is included further to be understood the present invention to provide, and is merged in the application and formation the application's a part, and accompanying drawing illustrates embodiments of the invention, and is used to explain the principle of the invention with describing.In the accompanying drawings:

Fig. 1 is the view that the ios dhcp sample configuration IOS DHCP of wireless personal area network (WPAN) is shown;

Fig. 2 is the view that is illustrated in the example of the superframe that uses in the piconet;

Fig. 3 is the figure that the ios dhcp sample configuration IOS DHCP of wireless video regional network (WVAN) is shown;

Fig. 4 explains two-forty physics (HRP) the layer channel in WVAN, use and the view of the frequency band of low-rate physical (LRP) layer channel;

Fig. 5 is the view that is illustrated in the example of the superframe structure that uses among the WVAN;

Fig. 6 is a view of explaining another example of the superframe structure that in WVAN, uses;

Fig. 7 is the view that is illustrated in the protocol hierarchy of realizing in the equipment of WVAN;

Fig. 8 illustrates the wherein transmitting apparatus acceptance of WVAN to send the flow chart of the example of data by the channel resource of telegon distribution and to receiving equipment;

Fig. 9 is the view that illustrates according to the example of the powering mode of the receiving equipment of the superframe structure that in WVAN, uses;

Figure 10 illustrates the flow chart that in WVAN, sends the example of data according to an embodiment of the invention under the state of the channel resource scope of expansion distribution;

Figure 11 is the view of data format example that media interviews control (MAC) header of WVAN is shown;

Figure 12 illustrates the view of the data format example of MAC control header according to an embodiment of the invention;

Figure 13 illustrates the view of the example of the superframe structure in WVAN according to an embodiment of the invention;

Figure 14 illustrates the view of another example of the superframe structure in WVAN according to an embodiment of the invention;

Figure 15 illustrates the view of another example of the superframe structure in WVAN according to an embodiment of the invention;

Figure 16 is the flow chart that transmits the example of data under the state of in WVAN, expanding the channel resource scope of distributing that illustrates according to another embodiment of the invention;

Figure 17 is the view that HRP ACK packet data format example according to another embodiment of the invention is shown;

Figure 18 is the view of the example of the superframe structure among the WVAN that illustrates according to another embodiment of the invention; And

Figure 19 is the view of example that the broadcast signal process system of the equipment that comprises WVAN according to an embodiment of the invention is shown.

Embodiment

From consider the following detailed description relevant with accompanying drawing, other advantages of the present invention, purpose and characteristic will be more apparent.

Following embodiment is that technical characterictic of the present invention is applicable to the example as one type wireless video regional network (WVAN) of wireless personal area network (WPAN).

Fig. 3 is the view of example that the configuration of WVAN is shown.

Similar with the WPAN shown in Fig. 1, WVAN comprises two or more subscriber equipmenies 22 to 25, and an equipment is operated as telegon 21.Telegon 21 is used to provide the basic timing of WVAN, belongs to the tracking of the equipment of WVAN with maintenance, and controls service quality (QoS) demand.Because telegon also is an equipment, so except the function of telegon, telegon is carried out the function of an equipment that belongs to WVAN.Can initiate stream except other equipment 22 to 25 of telegon 21 connects.

The difference of WVAN shown in Figure 3 and the WPAN of Fig. 1 is, supports physics (PHY) layer of two types.That is to say that WVAN supports two-forty physics (HRP) layer and low-rate physical (LRP) layer.The HRP layer is the physical layer that can support the data transfer rate more than the 1Gb/s, and the LRP layer is a physical layer of supporting the data transfer rate of some Mb/s.The HRP layer is a short transverse property, and is used for connecting transmission isochronal data stream, asynchronous data, media interviews controls (MAC) order and audio/video (A/V) control data through clean culture.LRP layer support direction or omni-directional mode, and be used for sending beacon, asynchronous data and MAC order through clean culture or broadcasting.Telegon 21 can use HRP layer and/or LRP layer that data are sent to another equipment perhaps from another equipment receiving data.

Other equipment 22 to 25 of WVAN can use HRP layer and/or LRP layer to send or receive data.

Fig. 4 is a view of explaining the frequency band of the HRP channel in WVAN, use and LRP channel.The HRP layer uses four channels that in 57 to 66GHz frequency band, have the 2.0GHz bandwidth, and the LRP layer uses three channels with bandwidth 92MHz.

As shown in Figure 4, HRP channel and this frequency band of LRP Channel Sharing, and this frequency band is divided according to time division multiple access (TDMA) scheme and is used.

Fig. 5 is the view that is illustrated in the example of the superframe structure that uses among the WVAN.

With reference to figure 5, each superframe comprise the beacon region that wherein transmits beacon, by telegon according to the request of equipment distribute to the reserved area of particular device and wherein data between telegon and the equipment or between equipment and equipment according to the zone of the non-reservation of sending or receiving based on the method for competition.These zones are divided provisionally.Beacon comprises timing allocation information and the WVAN management and the control information of this superframe.This reserved area is used to make that equipment (channel time by the telegon distribution is accepted in its channel time allocation request according to this equipment) can be to another equipment sending data.

Order, data flow or asynchronous data can be sent via reserved area.If send particular data to another equipment via reserved area, then use the HRP channel, and if the equipment that receives data send the affirmation (ACK) of the data that are used to receive/negate ACK (NACK) signal, then use the LRP channel.This non-reserved area can be used between telegon and the equipment or between equipment and equipment, send control information, MAC order or asynchronous data.In order to prevent the data contention between equipment in non-reserved area, can be suitable for carrier sense multiple access (CSMA) scheme or time slot Aloha scheme is arranged.In the zone of non-reservation, data can only be sent via the LRP channel.

If the amount of control information of sending or order is very big, then can in the LRP channel, reserved area be set.Reserved area in each superframe possibly be different with number according to superframe with the length of non-reserved area, and is controlled by telegon.

Fig. 6 is a view of explaining another example of the superframe structure that in WVAN, uses.

With reference to figure 6, each superframe comprises zone 30, channel reservation time block 32 and the non-channel reservation time block 31 that wherein sends beacon.This channel time blocks (CTB) is divided into the zone (LRP zone) of wherein sending the zone (HRP zone) of data and wherein sending data via the LRP layer via the HRP layer provisionally.

Beacon 30 is sent by telegon termly, so that discern the preface part of each superframe, and comprise timing information and the WVAN management and the control information of scheduling.This equipment can use the timing information and the management/control information that are included in this beacon in network, to carry out exchanges data.

In the HRP zone, this reservation CTB zone can be used to make that equipment can be to another equipment sending data, and this equipment is accepted the channel time by the telegon distribution according to the channel time allocation request of this equipment.

If particular device then uses the HRP channel to another equipment sending data via reserving the CTB zone, and if the equipment that the receives data ACK that sends the data that are used to receive divide into groups, then use the LRP channel.This non-reservation CTB zone can be used between telegon and the equipment or between equipment and equipment, send control information, MAC order or asynchronous data.In order to prevent the data contention between equipment in non-reservation CTB zone, can be suitable for the CSMA scheme or have the Aloha scheme of time slot.

In non-reservation CTB zone, can only send data via the LRP channel.If the amount of control information of sending or order is very big, then can in the LRP channel, reserved area be set.

Reserved area in each superframe possibly be different with number according to superframe with the length of non-reserved area, and is controlled by telegon.Though not shown in Fig. 6, this superframe comprises the control period (CBCP) based on competition that is close to this beacon setting, so that send emergency control/administrative messag.The length of CBCP is set to be not more than predetermined threshold mMAXCBCPLen.

Fig. 7 is the figure that is illustrated in the protocol hierarchy structure that realizes in the equipment of WVAN.

With reference to figure 7, each the communication module that is included in equipment among the WVAN can be divided into four layers according to function: adaptive sublayer 40, MAC layer 41, PHY layer 42 and station administration entity (SME) 43.This station is the equipment that is different from telegon, and SME has and the identical implication of equipment management entity (DME).SME be used to control lower floor and from the state information of this equipment of this layer collection layer independent community.SME comprises every layer the sign that is used for the management equipment communication module.

The entity that is used for the managing MAC layer is known as MAC layer management entity (MLME), and the entity that is used to manage adaptation layer is called as adaptation layer management entity (ALME).Adaptive sublayer 40 can comprise AVC agreement and A/V burster.AVC agreement (audio frequency and video layer) the 400th is carried out stream and is sent the upper strata that connects and be used for the Equipment Control of the A/V transfer of data between transmitter and receiving equipment.The A/V data that 410 pairs of A/V bursters are used for the HRP data, services format.

MAC layer 41 is lower floors of transmission of materials agreement, and carries out link establishment, connection or disconnection, channel access and reliable data transmission.That is to say that the MAC layer sends control/data-message, perhaps channel is controlled.PHY layer 42 can directly be handled the A/V data, and perhaps MAC layer 41 can be handled the A/V data.The PHY layer switches the message by the upper strata request, such as adaptation layer 40 or MAC layer 41, so that handle radio signal, makes request message pass through the PHY layer and between equipment, sends.The PHY layer comprises the PHY layer of two types with HRP 420 and LRP 421.The layer of this equipment provides service, such as high rate services, Low rate services and management service.High rate services is used to transmit video, audio frequency and data, and Low rate services is used to transmit voice data, MAC order and a spot of asynchronous data.Before carrying out data exchange process, between layer, exchange simple message, and the message of exchange between different layers is known as primitive.

In order in wireless network, between equipment, to carry out radio communication, telegon should be to the particular device allocation of channel resources may.Be used for when another equipment sends the channel assignment request of A/V data when particular device sends, this telegon is carried out the channel search operation that is used to search for the channel with least interference rate.

If channel resource is available; The channel resource that then has preset range is assigned to the equipment of transmitting channel request for allocation, and the equipment of the channel resource of accepting to be distributed by telegon can use the channel resource of distribution to come another equipment sending data to wireless network.

Fig. 8 illustrates the channel resource that the wherein transmitting apparatus acceptance of WVAN is distributed by telegon, and sends data to the flow chart of the example of receiving equipment.

With reference to figure 8, this transmitting apparatus is to telegon transmitting channel resource request message (bandwidth response command), so that obtain to be used for the channel resource (S10) of data packet transmission.The telegon of receive channel resource request message determines whether to exist the available channel resource (S11) that will distribute to transmitting apparatus.If confirmed to exist available channel resource, the response message (bandwidth response command) that the channel resource that this telegon sends indication request is assigned to transmitting apparatus (S12).

This telegon sends the form of the channel resource that newly distribute about the general or the information (S13) of scope to transmitting apparatus on beacon.At this moment, other the equipment that comprises receiving equipment that belongs to WVAN receives the indication telegon distributes the predetermined channel stock number on by information from the beacon of telegon broadcasting to transmitting apparatus.

Acceptance is sent A/V grouping (S14) to receiving equipment from the transmitting apparatus of the predetermined channel resource amount of telegon on the channel resource that distributes.At this moment, A/V is grouped on the reserved area in the superframe of channel resource of distribution and sends, and other control informations and asynchronous packet are sent on non-reserved area.

Reception is sent ACK grouping (S15) from the receiving equipment of the A/V data of transmitting apparatus to transmitting apparatus.Ack signal is to send to transmitting apparatus so that the normal signal that receives of signal quilt that indication is sent by transmitting apparatus from receiving equipment.When receiving ack signal, this transmitting apparatus can send next data.In contrast, the NACK signal is that indication occurs causing receiving equipment can't normally receive from the signal of the signal of transmitting apparatus transmission owing to dropout is perhaps wrong.When receiving the NACK signal, this transmitting apparatus should retransmit does not have the normal packet that receives.

Usually, this equipment can be specified the scheduling type of the channel resource that is distributed by telegon, simultaneously to telegon request channel resource allocation, and in the channel resource request message, comprises scheduling type.The scheduling type of this channel resource can be divided into static scheduling type and dynamic dispatching type according to the characteristic that is included in the CTB in this superframe.Static scheduling type is used for being used for the continuous dispensing of the superframe of the one or more CTB with identical size of section packet that transmission should continue to send at the fixed time to comprising; Packet is such as the A/V packet, and each superframe comprises the CTB of similar number.

In contrast, the dynamic dispatching type is used for interim transfer of data, such as wave beam search, control messages change etc., and because the size of superframe possibly not equate, be not limited so be included in the number of the CTB in each superframe.

In Fig. 8, channel resource request command (bandwidth response command) be used for to telegon request channel resource distribution, change or finish, so that carry out and the perhaps process that is associated of the transfer of data of another equipment from the transmitting apparatus to the telegon.This channel resource request command divides into groups to comprise the zone of n channel resource request terms of indication (bandwidth request item), and a channel resource request terms zone can be to be configured at the data format shown in the table 1.

Table 1

Reference table 1, channel resource request terms zone can comprise the TrgtID field of ID of the equipment of indication request channel resource allocation; The stream request id field of the type of the request message of indicating equipment; Indication is by the stream index field of the stream index of telegon distribution; Indicate the minimum number destination field of the time block of the minimal amount that is included in a channel resource in the superframe; The maximum number field of the time block of the maximum number of indicating channel resource; The time block duration field of the duration of each of indicating channel resource; Indicate the minimum scheduling slot field of minimum scheduling slot; Indicate the maximum scheduling slot field of maximum scheduling slot and the request control field that comprises the solicited message of channel resource.The stream index that this stream index field indication is confirmed by telegon.

This telegon is according to being come to the unique stream index of each flow distribution of WVAN by data or type of service that equipment sends.For example, if the device request synchronous flow, then stream index field is set to the stream index of not assignment.If the channel resource of asynchronous flow is reserved or finished to be used for to device request, then this stream index field is set to be used to send the value of asynchronous flow.

The indication of the minimal amount of time block at the device request channel resource so that the channel resource of in a superframe, asking when sending synchrodata (for example; Channel time blocks) minimal amount, and indication at the device request channel resource so that the sum that is included in a channel resource in the superframe when sending asynchronous data.

The indication of the maximum number of time block so that request will be by the maximum number of the channel resource of devices allocation when sending isochronous data packet, and is reserved the transmission that is used for other packets at the device request channel resource under the situation of asynchronous flow request.The field indication of time block duration is included in the duration of a plurality of channel resource blocks in the scheduling.

Minimum scheduling slot field indication in continuous dispensing under the situation of two channel resource blocks, the minimum value from the time point when the first channel resource BOB(beginning of block) to the period of the time point when the second channel Resource Block begins.Maximum scheduling slot field indication be used in device request isochronous data packet channel resource and continuous dispensing under the situation of two channel resource blocks, the maximum from the time point when the first channel resource BOB(beginning of block) to the period of the time point when the second channel Resource Block begins.

In contrast, be used under the situation of channel resource of asynchronous packet the time during the first channel resource BOB(beginning of block) that this field indication distributes in superframe in device request.This request control field regulation is by the scheduling type of the channel resource of telegon distribution and the type of physical layer.

For example, if 1 bit is used to indicate scheduling type, then Jing Tai scheduling type can be set to 1, and the dynamic dispatching type can be set to 0.

Equipment can be specified the type or the distribution time of the channel resource that will distribute, and uses the channel resource request command to come telegon request channel resource allocation.

Determining whether to exist after available channel is assigned to equipment, the telegon of receive channel resource request command can transmitting channel resource response order (bandwidth response command).This channel resource response command comprises as n the channel resource response item (bandwidth response item) that is included in the response of n channel resource request terms in the channel resource request command.Channel resource response item zone can be to dispose at the data format shown in the table 2.

Table 2

Eight bit byte: 1 1 1 Stream request ID Stream index Reason-code

Reference table 2, the stream request ID and the stream index of example indication appointment in the channel resource request command that slave unit receives in this channel resource response item zone.Channel resource response item zone can comprise stream request id field, stream index field and cause code field.If can not distribute this channel resource, then cause code field specifies telegon whether can come allocation of channel resources may according to the request of equipment and the code of indication reason.

For example, cause code field is set to 0x00, if its indication telegon has confirmed to exist available resources as the channel resource Search Results, then channel resource allocation is possible; And be set to 0 * 02, it indicates such reasons: because when the extra channel resource of device request, carry out transfer, so channel resource allocation is impossible.

If telegon has the channel resource of preset range to devices allocation, then on beacon, transmit the assignment information of new channel resource to equipment.

Usually, under unencrypted state, send this beacon, and this beacon comprises scheduling timing information, management and the control information of WVAN via omnidirectional low-rate physical data cell (LRPDU).This bootstrap information divides into groups to comprise the scheduling IE field of MAC control header, beacon control field and indication n bar schedule information.Usually, information element (IE) data format is made up of the field of the length that comprises IE index, IE signal and the information that will transmit.

The scheduling time information of this scheduling IE indication in next superframe.For example, be included in the temporal information that N the scheduling IE in the beacon indicates the superframe that begins at (N+1) individual beacon place.This scheduling IE comprises n Scheduling Block, and each Scheduling Block comprises temporal information and the duration information of each channel time blocks of beginning of first channel time blocks of index information, the scheduling slot of the stream that this scheduling is assigned to, the number of distributing to the channel time blocks of a scheduling, this scheduling.

This beacon control field comprises the beacon state field, be used in reference to superframe temporal information field and the field of indication number of superframes of the temporal information of the transmission period that fixes between the continuous beacon.Be included in as shown in table 3 being configured of packet of the beacon state field in the beacon control field.

Table 3

Bit: 1 1 1 1 1 3 The idle channel time Configuration change Scheduling changes Static scheduling Take orders Reserve

Reference table 3; The example of beacon state field comprises the idle channel time field of expression about the information that whether has available channel resources according to the channel resource request; Indication except the field of indication number of superframes in current beacon the configuration change field of the configuration change of the channel resource of appointment; Indication changes field through compare the scheduling that on current superframe, whether has changed dispatch channel resource with previous beacon; Whether indication static scheduling IE is included in the static scheduling field in the current beacon, indicates whether to accept the field that takes orders of allocation request of channel resources; And the reserved field that is used to send other data.In table 3, if the telegon allocation of channel resources may, then field can be set to 1 the idle channel time, and if confirmed not distribute new channel resource, then can be set to 0.

If do not carry out configuration change, then channel resource configuration change information field can be set to 0.The static scheduling field can not be included in all beacons, so that reduce the expense that generates by this beacon, but can comprise static scheduling IE termly.

Similarly, if static scheduling IE is not included in the current beacon, then the static scheduling field can be set to 0, and if the channel assignment request of this equipment of telegon refusal, the field that then takes orders can be set to 0.By said process with channel resource allocation to transmitting apparatus can set up the WVAN network with another equipment, and send packet (S14) to receiving equipment via the channel resource that distributes.Similarly, transmitting apparatus receives the ACK grouping (S15) that is used for packet from receiving equipment.

Particularly, transmitting apparatus uses superframe structure shown in Figure 5 to send packet to receiving equipment.To be described in the example of the superframe structure that uses by WVAN equipment among step S14 and the S15 with reference to figure 9.

Fig. 9 is the view that illustrates according to the example of the powering mode of the receiving equipment of the superframe structure that in WVAN, uses.

Is the zone that is used to send beacon with reference to 9, one superframes of figure by provisional division, uses one or more channel reservation time B of the channel resource that is distributed by telegon 1, B 2... and be used for according to the one or more non-channel reservation time A that under the situation of not using channel resource, between equipment, sends and receive signal based on the method for competition 1, A 2....The channel resource that is distributed by telegon can comprise one or more CTB.As stated, when transmitting apparatus is made the request to the channel resource of telegon, can distribute this channel resource.

The CTB of this channel reservation time is available, and this transmitting apparatus sends packet to receiving equipment on the HRP channel, and this receiving equipment divides into groups to the ACK that transmitting apparatus sends the packet that is used to receive on the LRP channel.Can on the HRP channel, send ACK divides into groups.At this moment, in order to make receiving equipment can carry out the handshaking with transmitting apparatus, the powering mode of receiving equipment is set to normal mode, and this normal mode is " connection " state.

With the channel reservation asynchronism(-nization) of wherein specifying particular device and allocation of channel resources may, this channel reservation time can be according between equipment, sending and receive control signal, data etc. based on the method for competition.Because this receiving equipment on the beacon signal of broadcasting in advance by telegon, receive about the channel resource period of distributing to transmitting apparatus and channel reservation time/information of channel time of non-reservation; The powering mode of this receiving equipment can begin to switch to save mode from the time point when the non-channel reservation time begins, this save mode is perhaps " energy-conservation " pattern of " shutoff " pattern.

The powering mode of " normal mode " indication " connection " state, and the perhaps powering mode of " energy-conservation " state of " save mode " indication " shutoff " hereinafter, are described for ease.

Because receiving equipment only channel reservation in the time powering mode be set to normal mode, so if transmitting apparatus at channel reservation time B 1In do not accomplish the transmission of packet, then be close to channel reservation time B being positioned at 1Non-channel reservation time A 2In the remaining data transmission packets be limited.

Be used to send the NACK signal of packet if transmitting apparatus receives from receiving equipment, and retransmit this packet, do not satisfy the tentation data transmission quantity in the time at channel reservation with preset range.

In this case, since transmitting apparatus via next channel reservation time B 2And not at non-channel reservation time A 2Last execution transfer of data has then increased the transmission time, has perhaps increased to be used for the cache-time that data reproduction consumes.

Embodiments of the invention relate to and are used for using the non-channel reservation time of superframe to send the method for packet at WVAN equipment, will describe this method with reference to Figure 10.

Figure 10 illustrates wherein the flow chart of data example of transmission under the state of the channel resource scope that expansion distributes according to an embodiment of the invention in WVAN.

With reference to Figure 10, transmitting apparatus uses the channel resource that is distributed by telegon to send packet (S20) to receiving equipment, and receives the ACK grouping (S21) that is used for packet from receiving equipment.This process repeats in the channel reservation that is distributed by telegon.At this moment, transfer of data can not be accomplished in the time at the channel reservation with preset range, and perhaps data possibly lost during the transmission.

For example; To send to the amount that the amount of data packets of receiving equipment is expected maybe be greater than the channel resource allocation made at equipment the telegon request time from transmitting apparatus; If loss of data perhaps takes place in transmission course, then predetermined channel reservation in the time transfer of data can not accomplish.

According to one embodiment of present invention, will be under situation about being sent out continuously under the situation of free restriction in data such as video data, this transmitting apparatus is to receiving equipment transmitting channel temporal extension information (S22).The current expansion that is used for the CTB of data packet transmission of this channel time extend information request, and indicate the expansion of this channel resource.

Therefore, in the present invention, this channel time extend information has identical implication with the channel resource extend information.This transmitting apparatus is to receiving equipment transmitting channel temporal extension information, so that in step S20 and 21, on the CTB of non-channel reservation time of the contiguous channel reservation time that is used to send this packet, send packet.The receiving equipment of receive channel temporal extension information not only can but also can keep powering mode to be in normal mode at non-channel reservation in the time in the channel reservation time, so that receive packet (S23) from this transmitting apparatus.

At this moment, receiving equipment does not keep powering mode to be in normal mode according to the request of this transmitting apparatus, and can powering mode be switched to save mode according to the selection of receiving equipment.

Because receiving equipment keeps powering mode to handle normal mode at some non-channel reservation time durations, this transmitting apparatus retransmits remaining data (S24).Then, this transmitting apparatus receives the ACK grouping (S25) that is used for data from receiving equipment.According to one embodiment of present invention, under the state the mac header that is included in the packet of sending, this channel time extend information can be sent to receiving equipment, describe referring now to Figure 11 and 12 from transmitting apparatus.

Though MAC control header data form is described to the transformat of channel time extend information, this channel time extend information can or be sent via the separate radio signal under the state in the mac header that is included in another field rather than packet.

Figure 11 is the view of example of data format that the mac header of WVAN is shown.

With reference to Figure 11, the WVAN packet comprises mac header 40 and the grouping body field 41 that comprises that a plurality of sons divide into groups.Grouping has identical implication with MAC in packet.Mac header 40 is subdivided into MAC control header 410, MAC extension header 420, security header 430, video header 440, CP header 450 and channel reservation time 460.Mac header shown in Figure 11 is the mac header that is included in the data of sending via the HRP channel.

MAC extension header 420 comprises about the information that has high transfer rate link at the link that is used for transfer of data, about the information of HRP pattern and LRP pattern and one or more ACK group.ACK group respectively be included in the grouping body field in son divide into groups corresponding.

This security header 430 comprises being used to discern and is used for via the checking of the data of divide into groups sending or the information of encrypted secret key.CP header 450 is used to transmit the content protection information of grouping, and the form of CP header can be realized according to the content protecting method that in data, uses differently.

Channel time extend information according to an embodiment of the invention can be included in the MAC control header 410, describes referring now to Figure 12.

Figure 12 illustrates the view of the data format example of MAC control header according to an embodiment of the invention.

With reference to Figure 12, the example of MAC control header 410 comprises grouping control field 411, be used for being provided with sends at WVAN the A/V data transmitting apparatus (its) ID DestID412, be used to be provided with and will receive the channel time 417 of SrcID field 413, the WVAN id field 414 that is used to discern the WVAN network that comprises this equipment, stream index field 415 and reservation of ID of the receiving equipment of the A/V data of sending.

According to one embodiment of present invention; If transmitting apparatus need be expanded transmission after current C TB; Then with respect in a plurality of packets of sending any one via the CTB of channel reservation time; A part that is included in the channel reservation time 417 in the MAC control header is defined as channel time expansion (CTE) field 416, so that comprise this channel time extend information.

If give the CTE field with 1 Bit Allocation in Discrete, then this channel time extend information can be indicated by 0 or 1.For example, if the CTE bit is set to 1 in the CTE field on the end control of the MAC in the grouping of being sent the before header of CTB, then indicate a part that is expanded the non-channel reservation time by the CTB of the current use of transmitting apparatus.And if transmitting apparatus need not further expand, the CTE bit is set to zero in the CTE field in the grouping of being sent.

In order to make transmitting apparatus can use at the channel reservation CTB of the non-channel reservation time after the time, then the channel time extend information should be sent out before the channel reservation time finishes.Therefore, if the CTE bit of the CTE field that the MAC that is received by receiving equipment divides into groups is set to 1, then this receiving equipment can keep being in normal mode with the powering mode of receiving equipment.And receiving equipment can continue monitor to divide into groups during following non-reservation CTB or the wave beam search, receives up to it to have the grouping that is set to 0 CTE bit.

This transmitting apparatus because this receiving equipment is during predetermined periods, even make powering mode keep being in normal mode in the time, so can send data or carry out the wave beam search procedure in the corresponding period at non-channel reservation.Even the CTE bit that receives the CTE field from transmitting apparatus when receiving equipment is when being set to 1 channel time extend information, and this powering mode can be switched to save mode according to the selection of receiving equipment.

The channel time extend information that is used for CTB expansion can be set to 1 and 0 CTE bit and uses through switching in the CTE field mutually.Alternatively, can give the CTE field with two or more Bit Allocation in Discrete.In this case, can send more how detailed channel time extend information.

Figure 13 to Figure 15 is the view that illustrates according to the example of the superframe structure in WVAN of embodiments of the invention.

With reference to Figure 13, when transmitting apparatus channel reservation in the time via the HRP channel when receiving equipment sends one or more packet, this receiving equipment divides into groups via the ACK that the LRP channel sends the packet be used to receive.At this moment, do not have by transmitting apparatus via being included in the first channel reservation time B if exist 1In the packet Data4 that sends of CTB, then be set to 1 CTE bit and be included in channel reservation time B 1Be sent out under the state of the CTE field of the MAC control header of the middle final data grouping Data3 that sends.Even at the channel resource that is set to the non-channel reservation time in the period, the receiving equipment that receives packet Data3 remains normal mode with powering mode.Therefore, this transmitting apparatus can use the CTB of non-channel reservation time to send packet Data4.

Next, when transmitting apparatus did not have more data to send, the CTE bit of the packet Data4 that sends was set to 0.Be set to the CTB that 0 CTE bit indication transmitting apparatus does not re-use the non-channel reservation time.Therefore, receiving equipment keeps normal mode, is used to send the period C that ACK divides into groups up to reaching.In time, the powering mode of receiving equipment can be switched to save mode or resting state at follow-up non-channel reservation, and transmitting apparatus is via the channel time B of next one reservation 2CTB send remaining packet.

Figure 14 illustrates the view of another example of the superframe structure in WVAN according to an embodiment of the invention.

With reference to Figure 14, if transmitting apparatus uses channel reservation time B 1CTB be sent in the MAC control header of last packet Data2 and be set to 1 CTE bit, then this receiving equipment keeps powering mode to be in normal mode, makes transmitting apparatus can use the CTB of non-channel reservation time.

At this moment; If some packet loss; Mistake perhaps appears in transmission course; And send the NACK signal; Then transmitting apparatus can retransmit identical packet via the channel resource period of expansion in the time at non-channel reservation, and perhaps the state of packet loss sends next packet down therein.In Figure 14, the transmitting apparatus that receives the NACK signal retransmits identical data Data2.

At this moment, because the CTE bit that is included among the packet Data2 is set to 1, then receiving equipment keeps powering mode to be in normal mode, and transmitting apparatus sends next packet Data3.At this moment, if the CTE bit that is included among the packet Data3 is set to 0, then indicate transmitting apparatus not re-use the CTB of non-channel reservation time.Therefore, this receiving equipment is switched to save mode or resting state at follow-up non-channel reservation in the time.

Therefore, the CTB that is used by transmitting apparatus is expanded through period C.Figure 15 illustrates the view of another example of the superframe structure in WVAN according to an embodiment of the invention.

Be similar to the foregoing description, even in Figure 15, the CTE bit that transmitting apparatus can be included among the last packet Data2 that channel reservation sends in the time is set to 1, and uses to the receiving equipment notice and to be included in the CTB of non-channel reservation in the time.The CTE bit can also be included among the packet Data3 that non-channel reservation sends in the time.

This receiving equipment receives and is set to for 1 CTE bit channel temporal extension time, and carries out therein among the CTB of data packet transmission and keep powering mode to be in normal mode.At this moment, this transmitting apparatus can be carried out the wave beam search operation in the CTB of non-channel reservation time under normal mode.If transmitter does not need further expansion, then the CTE bit is set to zero in the grouping of being sent.Have the grouping that is set to zero CTE bit if receiving equipment receives at non-channel reservation time durations, then no longer need monitor grouping, and can switch to resting state.And receiving equipment switches to save mode with powering mode at remaining non-channel reservation in the time.

In the embodiment that describes with reference to figures 13 to Figure 15, if receiving equipment receive channel temporal extension information, but powering mode is switched to save mode, then this transmitting apparatus can use next channel reservation time B 2CTB send packet, and attempt the next non-channel reservation time A of expansion 3The scope of CTB.

Next, with the use of the channel time of the non-reservation of according to another embodiment of the invention WVAN superframe explicitly, will the method that be used for sending at the receiving equipment place response message that is used for the channel time extend information be described with reference to Figure 16.

Figure 16 is the flow chart that the example that data according to another embodiment of the invention are transmitted under the state of the channel resource scope that expansion distributes in WVAN is shown wherein.

With reference to Figure 16, the transmitting channel temporal extension time uses the channel resource that is distributed by telegon sends the A/V data to receiving equipment via the channel reservation time of WVAN superframe step (S20 and 22) and shown in Figure 10 those to be equal to simultaneously at the transmitting apparatus place.

According to another embodiment of the present invention, the receiving equipment of channel time extend information that receives the expansion of the CTB be used for current use from transmitting apparatus determines whether to adjust powering mode (S30) according to the information that receives.If receiving equipment is confirmed to keep normal mode or switch to save mode according to the state of receiving equipment, confirm to generate response message based on this.

The response message of this generation is sent to transmitting apparatus (S31).After this, keep powering mode to be in the response message of normal mode according to the channel time extend information, then data can be carried out via the non-channel reservation time from the step S32 that transmitting apparatus sends to receiving equipment if receive indication from receiving equipment.On the contrary, if receive the response message that the indication powering mode is switched to save mode from receiving equipment, then transmitting apparatus sends these data via the next channel reservation time.

This response message can be included in from receiving equipment and send to the ACK grouping of transmitting apparatus, will describe with reference to Figure 17.

Figure 17 illustrates the view of example that is used for sending according to the channel time extend information packet of response message in accordance with another embodiment of the present invention.

Usually, the data transfer between devices/reception in WVAN is carried out via the HRP channel, and beacon or ACK transmission packets/reception are carried out via the LRP channel.

According to another embodiment of the invention, receiving equipment can send ACK and divide into groups on the HRP channel, perhaps sends HRP ACK and divides into groups, as shown in Figure 17.The HRP ACK that is sent by the receiving equipment that receives packet from transmitting apparatus divides into groups to comprise MAC control header fields 50 and HRP ACK header fields 51.

SrcID field 503, the WVN id field 504 that is used to discern the WVAN network that comprises equipment, the stream index field 505 of the ID that the example of MAC control header 50 comprises grouping control field 501, be used for being provided with the DestID field 502 of will send the ID of the receiving equipment that ACK divides into groups at WVAN, be used to be provided with the transmitting apparatus that receives the ACK grouping of sending and being used to sent the channel reservation time 507 of remaining data etc.

Determine whether that according to the channel time extend information of sending the receiving equipment of carrying out the channel time expansion can be assigned as the part of reserved field 507 CTE affirmation (CTEC) field 506 that is used for sending according to the channel time extend information response message by transmitting apparatus.The CTEC field is to use for convenience, and the field that is used for sending according to this channel time extend information response message can be represented by another term.

If give the CTEC field, then can use 0 or 1 to indicate receiving equipment whether to confirm the channel resource expansion of indication to non-reserved field with 1 Bit Allocation in Discrete.For example, if be set to 1, then indicate this receiving equipment to keep powering mode to be in normal mode, and prepare Data Receiving according to this channel time extend information with the corresponding CTEC bit of CTEC field.

On the contrary,, then indicate this channel resource scope not to be expanded, and this receiving equipment switch to save mode with powering mode after sending ack signal if be set to 0 with the corresponding CTEC bit of CTEC field.

Opposite with above example, if the CTEC bit is set to 1, then can indicate this powering mode to be switched to save mode, and if the CTEC bit be set to 0, then can indicate the maintenance normal mode.In addition, if more bits is distributed to the CTEC field, then the response format of this receiving equipment become variable, and if the channel resource extended requests of transmitting apparatus be rejected, then can indicate the reason of refusal.

If receiving equipment sends about whether carrying out confirming of channel time expansion according to the channel time extend information to transmitting apparatus as this response, this transmitting apparatus can not repeat to prepare transfer of data via next reserved field under the situation of same request.

Figure 18 is the view that the example of the superframe structure in WVAN according to another embodiment of the invention is shown.

With reference to Figure 18, receiving equipment can send the acceptance that is included in the HRP ack signal via the HRP channel and perhaps refuse response message in response to the channel time extend information (being set to 1 CTE bit) of sending from transmitting apparatus.

If transmitting apparatus is drawn together channel time extend information (being set to 1 CTE bit) in the mac header of last packet Data2, and via channel reservation time B 1Send, and receiving equipment adjusts powering mode according to the channel time expansion time, then receiving equipment sends and has the ACK that is set to 1 CTEC bit and divide into groups.The CTEC bit is included in the mac header of the ack signal that is used for sending packet Data2.Being set to the indication of 1 CTEC bit keeps the powering mode of receiving mode to be in normal mode according to the channel time extend information of transmitting apparatus.

Therefore, this transmitting apparatus can the extended channel resource reach the number of C TB (period C) of non-channel reservation time, and sends packet Data3.

Simultaneously, if receiving equipment is not followed the channel information extend information, then with reference to Figure 18, when the CTE bit of the mac header of last packet Data5 is set to 1 and at channel reservation time B 2In when being sent out, then the receiving equipment CTEC bit that can be included in the mac header that the ACK that is used for sending packet Data5 divides into groups is set to 0, and sends this response message.

That is to say, send indication the non-channel reservation time begin ground simultaneously the powering mode of receiving equipment be switched to the response message of save mode.The response message that sends to transmitting apparatus from receiving equipment can send at the LRP channel under the state being included in the ACK grouping.Even in this case, response message can be sent out via the LRP channel under the state in being included in the MAC control header of full ACK grouping.The data format of MAC control header is equal to the data format of describing with reference to Figure 17, and with the descriptions thereof are omitted.This response message does not only divide into groups to send via ACK, but can send via another signal, perhaps can under the state in another field that is included in the ACK grouping, send.When receiving equipment when transmitting apparatus sends independent response message, this transmitting apparatus can accurately be confirmed the powering mode of this receiving equipment, so that reduce wrong incidence.

Figure 19 is the view that the broadcast signal process exemplary system of the equipment that comprises WVAN according to an embodiment of the invention is shown.

The equipment of this wireless network can be through carrying out following process via antenna reproduces from the broadcasting station or wired satellite receives A/V data.In addition, if equipment is operated as source device or transmitting apparatus on wireless network, then this equipment can remotely send the packet that receives to one or more synchronizers or receiving equipment.

With reference to Figure 19, comprise that broadcast signal process system according to the WVAN transmitting apparatus of the embodiment of the invention comprises transmitting apparatus 70, remote controllers 71, local memory device 72, receiving equipment 74 and is used to carry out the network equipment 73 of radio communication.

The transmitting apparatus 70 that sends packet can comprise receiving element 701, demodulating unit 702, decoding unit 703, display unit 704, control unit 705, channel resource control module 706, Graphics Processing Unit 707, transmission unit 708 and control signal communication unit 709.In the example of Figure 19, transmitting apparatus further comprises local memory device 72.Though disclose the example that local memory device 72 wherein is directly connected to the transmission unit 708 that comprises input/output end port, this local memory device can be mounted in the memory device in the transmitting apparatus 70.This transmission unit 708 can communicate with wire/radio network equipment 73, and can be connected at least one receiving equipment 74 that is present on the wireless network via the network equipment 73.This control signal communication unit 709 can receive user control signal, and comes to export the signal that receives to control unit according to the user control device such as remote controllers.

This receiving element 701 can be a tuner, and this tuner receives the broadcast singal with characteristic frequency via in surface wave, satellite, cable and the internet at least one.Receiving element 701 can be according to the broadcasting information source, and for example, surface wave, cable, satellite and personal broadcaster are comprised independently, perhaps can be used as integrated tuner and are mounted.If supposing receiving element 701 is terrestrial broadcasting tuners, can comprise one or more digital tuners and analog tuner, perhaps can comprise integrated digital/analog tuner.

Receiving element 701 can receiving internet agreement (IP) flow on wire/wireless communication.If receive IP stream, then receiving element 701 can be according to the grouping that is used for handling with respect to the IP agreement that the grouping of being sent by receiver and the IP that receives divide into groups to be provided with source and destination ground information transmission/reception.

This receiving element 701 can be included in the video/audio/data stream in the IP grouping that receives according to the output of IP agreement, and generates and export and will be grouped in the transport stream of sending on the network through IP according to the IP agreement.Receiving element 701 receives external image signal, and for example, can receive external video/audio signal with IEEE 1394 forms, perhaps receives outer flow with the HDMI form.

According to embodiments of the invention, if transmitting apparatus to receiving equipment transmitting channel temporal extension information, this transmitting apparatus can receive the response message be used for the channel time extend information via this receiving element 701 from receiving equipment.The broadcast singal of the data that these demodulating unit 702 demodulation receive via receiving element 701, the broadcast singal that perhaps uses the opposite method of modulator approach to come demodulation to send by receiving equipment.Demodulating unit 702 demodulation broadcast singals, and output broadcasting stream.If receiving element 701 receives the flow pattern signal, for example, IP stream, IP stream are walked around demodulating unit 702 to be outputed to decoding unit 703.This decoding unit 703 comprises audio decoder and Video Decoder, and uses decoding algorithm to decode from the broadcasting stream of demodulating unit 702 outputs, and flows to display unit 704 output decoders.At this moment, can further between demodulating unit 702 and decoding unit 703, further comprise the demodulation multiplexer (not shown) that is used for dividing stream according to identifier.Demodulation multiplexer can be divided audio element stream (ES) and video ES, and ES is outputed to each decoder of this decoding unit 703.

In addition, if a plurality of program is re-used in a channel, only the broadcast singal by user selected program can be selected, and is divided into video ES and audio ES.Event data stream or system information flows are included in the broadcast singal of demodulation, and then they are divided by demodulation multiplexer, so that be sent to each decoding block (not shown).Display unit 704 can show the broadcasted content that is received by receiving element 701, perhaps is stored in the content in the local memory device 72.Be used to show that the menu of information whether the indication memory device is mounted or the information that is associated with remaining memory capacity can be shown according to the control command of controller 705, and can be operated according to user's control.

Control unit 705 can control assembly (receiving element, demodulating unit, decoding unit, display unit, Graphics Processing Unit, network control module and interface unit) operation.The menu that is used to receive user's control commands can be shown, and is used for the user is shown that the application of the menu of various information or broadcast signal process system can be driven.

For example, if local memory device 72 is installed, then control unit 705 can read the content that is stored in the local memory device 72.If local memory device 72 is installed, then control unit 705 can be controlled the broadcasted content by receiving element 701 receptions that will be stored in the local memory device 72.Control unit 705 can be exported and is used to control the signal that local memory device 72 is mounted according to whether local memory device 72 is installed.

The remaining memory capacity of control unit 705 inspection local memory devices 72, and the information of the relevant remaining memory capacity of control is to be displayed to the user via Graphics Processing Unit 707 on display unit 704.If should the remnants lack of memory capacity, then control unit 705 can be stored in content in the local memory device 72 be sent to remote storage device etc. be stored in the remote storage device etc.

In this case; If the remaining lack of memory capacity of local memory device 72; Then control unit 705 can be to user's display menu on display unit 704, and this menu is used for indicating the content that is stored in local memory device 72 whether to be sent to another local memory device (not shown), remote storage device etc. and is stored in another local memory device (not shown), the remote storage device etc.

In addition, control unit can receive the control signal with process user.Therefore, control unit 705 can transmit the content in the memory device that is stored in local memory device 72 and direct or long-range installation each other.

Channel resource control module 706 control transmitting apparatus are accepted the channel resource by the telegon distribution, so that send data to receiving equipment, and the expansion of control channel resource reaches the part of the channel time of non-reservation.The example of channel resource comprises channel time, and channel reservation time and non-channel reservation time comprise one or more CTB.

Usually, transmitting apparatus can the channel reservation of the channel resource that distributes by telegon in the time to another equipment sending data etc., and can non-channel reservation in the time between equipment according to using the corresponding period based on the method for competition.Therefore, be sent out via the non-channel reservation time if hope data, this channel resource control module control channel temporal extension information then according to an embodiment of the invention is generated and is sent to receiving equipment.

Therefore, replace the method based on competition between equipment, the non-channel reservation time can be used as the use period of specific equipment.

Simultaneously, the channel resource control method of being carried out by channel resource control module 706 can be carried out by control unit 705.If channel resource control module 706 generates the channel time extend information; And send this channel time extend information to receiving equipment via transmission unit; And receiving equipment is adjusted powering mode according to the channel time extend information, and control unit 705 can be controlled the data that will send via the channel resource of expansion.

Though in Figure 19, comprise control unit 705 and channel resource control module 706 for the purpose of for convenience dividually, they can by as a System on Chip/SoC dotting realize.

This Graphics Processing Unit 707 can be handled the figure that will show, make on menu screen to show by display unit 704 video image displayed so that on display unit 704 display graphics.Transmission unit 708 can send at least one receiving equipment 74 with data through wire/radio network, and can comprise interface unit, makes two-way communication between the actuating equipment.If the telegon allocation of channel resources may, then transmitting apparatus sends data etc. via transmission unit 708 to receiving equipment in the channel resource scope of distributing.

This interface unit can dock with at least one second equipment 74 through wire/radio network, and its example comprises ethernet module, bluetooth module, local area radio internet module, mobile Internet module, Home Phoneling Networking Alliance (HomePNA) module, IEEE 1394 modules, FPGA (Field Programmable Gate Array) control (PLC) module, home radio (RF) module, Infrared Data Association (IrDA) module etc.

Simultaneously, this transmission unit 708 can be exported the control signal of the power supply that is used to connect remote storage device.For example, though not shown in Figure 19, this transmission unit 708 can send to the WOL signal network interface unit that communicates with independent remote storage device, and connects the power supply of remote storage device.

Above-mentioned term can be replaced with other term.For example; Term " equipment " can use term " user's set (perhaps equipment) ", " station " to wait and replace, and term " telegon " can " be coordinated (perhaps control) device " with term, " coordinating (perhaps control) equipment ", " coordinating (perhaps control) stands ", " telegon " perhaps " piconet coordinator (PNC) " replace.From with the relation of the equipment that is used to receive data, accept to have the channel resource of the preset range that distributes by telegon, and with data send to another equipment equipment can with term " device is sent out in the source " perhaps " transmitting apparatus " replace.From with the relation of the equipment that is used to send data, the equipment that is used to receive data can use term " target " perhaps " receiving equipment " replace.This term " packet " can use term " data block " perhaps " data unit " replace.

It will be apparent to those skilled in the art that under the situation that does not break away from spirit of the present invention or scope, can carry out various modifications and variation in the present invention.Therefore, hope that the present invention contains modification of the present invention and variation, as long as they fall in the scope of appended claim and its equivalent.

Industrial applicibility

The present invention goes for wireless communication system and wireless HD system.The present invention provides the method that exchanges messages and the embodiment of transmission and receiving equipment.

Claims (48)

1. method that is used for sending data at the transmitter of wireless network, said method comprises:
At the channel reservation time durations that distributes by telegon, send at least one data to receiving equipment and divide into groups; And
The information that will be used for the channel time expansion sends to said receiving equipment, to send packet at non-channel reservation time durations.
2. method according to claim 1, wherein, the said non-channel reservation time is that said telegon is not to the channel time of any devices allocation.
3. method according to claim 1, wherein, said channel reservation time or said non-channel reservation time comprise at least one channel time blocks.
4. method according to claim 1, wherein, when when the transmission of said at least one packet of said channel reservation time durations is not accomplished, the information that is used for the channel time expansion is sent to said receiving equipment.
5. method according to claim 1, wherein, the said information that is used for the channel time expansion is included in last packet of said at least one packet of said channel reservation time durations transmission.
6. method according to claim 5, wherein, the said information that is used for the channel time expansion is included in media interviews control (MAC) header of said last packet.
7. method according to claim 6, wherein, the said information that is used for channel time expansion (CTE) is to be set to 1 CTE bit.
8. method according to claim 7, wherein, said receiving equipment continues monitored data and divides into groups, and after receiving the CTE bit, does not switch to resting state.
9. method according to claim 1 further comprises: at said non-channel reservation time durations, send said packet to said receiving equipment.
10. method according to claim 9, wherein, said packet is sent out under the situation of any intervention that does not have said telegon.
11. method according to claim 9, wherein, said packet comprises second information that is used for the channel time expansion.
12. method according to claim 1 further comprises: begin beam forming process at said non-channel reservation time durations, perhaps said beam forming process is expanded to the said non-channel reservation time.
13. method according to claim 1, wherein, said information and said at least one packet that is used for the channel time expansion is sent out on two-forty physics (HRP) channel.
14. method according to claim 1 further comprises: on low-rate physical (LRP) channel, receive in response to said at least one packet and the said ACK grouping that is used for the information of channel time expansion from said receiving equipment.
15. a method of in the transmitter of wireless network, sending data, said method comprises:
At the channel reservation time durations that distributes by telegon, send at least one data to receiving equipment and divide into groups; And
Send the designator whether said transmitter of indication need expand to channel time the non-channel reservation time.
16. method according to claim 15, wherein, the said designator that is used for channel time expansion (CTE) is to be set to 1 CTE bit.
17. method according to claim 16, wherein, said receiving equipment continues monitored data and divides into groups, and after receiving said CTE bit, does not switch to resting state.
18. method according to claim 15, wherein, the said designator that is used for channel time expansion (CTE) is to be set to 0 CTE bit.
19. method according to claim 18, wherein, when said transmitter did not need further channel time to expand, said CTE bit was set to 0.
20. method according to claim 18, wherein, in case sent the ACK grouping in response to the packet that comprises said designator, said receiving equipment just no longer continues to monitor to divide into groups, and switches to resting state.
21. transmitter that in wireless network, sends data; Said transmitter is intended to be used for to send at least one data at the channel reservation time durations that is distributed by telegon to receiving equipment and divides into groups; And send the information that is used for the channel time expansion to said receiving equipment, to send packet at non-channel reservation time durations.
22. transmitter according to claim 21, wherein, the said non-channel reservation time is the channel time that said telegon is not distributed to any equipment.
23. transmitter according to claim 21, wherein, said channel reservation time or said non-channel reservation time comprise at least one channel time blocks.
24. transmitter according to claim 21, wherein, the said information that is used for the channel time expansion is included in last packet of said at least one packet of said channel reservation time durations transmission.
25. a method that in the receiving equipment of wireless network, receives data, said method comprises:
At the channel reservation time durations that distributes by telegon, receive at least one data from transmitter;
Receive the information that is used for channel time expansion (CTE) from said transmitter; And
After the information that receives CTE,, receive packet from said transmitter at said non-channel reservation time durations.
26. method according to claim 25, wherein, the said non-channel reservation time is the channel time that telegon is not distributed to any equipment.
27. method according to claim 25, wherein, said channel reservation time or said non-channel reservation time comprise at least one channel time blocks.
28. method according to claim 25 wherein, when when the reception of said at least one packet of said channel reservation time durations is not accomplished, receives the information that is used for the channel time expansion from said transmitter.
29. method according to claim 25, wherein, said packet is received under the situation of any intervention that does not have telegon.
30. method according to claim 25, wherein, the said information that is used for channel time expansion is included in last packet of said at least one packet that said channel reservation time durations receives.
31. method according to claim 30, wherein, the said information that is used for the channel time expansion is included in media interviews control (MAC) header of said last packet.
32. method according to claim 31, wherein, the said information that is used for channel time expansion (CTE) is to be set to 1 CTE bit.
33. method according to claim 32 further comprises: after receiving said CTE bit, make powering mode invalid switching to resting state, and continue to monitor packet from said transmitter.
34. method according to claim 25, wherein, said packet comprises second information that is used for the channel time expansion.
35. method according to claim 25 further comprises: begin the wave beam search procedure at said non-channel reservation time durations, perhaps said wave beam search procedure is expanded to the said non-channel reservation time.
36. method according to claim 25, wherein, said at least one packet and the said information that is used for the channel time expansion receive on two-forty physics (HRP) channel.
37. method according to claim 25 further comprises:, on low-rate physical (LRP) channel, send ACK and divide into groups to transmitter in response to said at least one packet and the said information that is used for the channel time expansion.
38. a method that in the receiving equipment of wireless network, receives data, said method comprises:
At the channel reservation time durations that distributes by telegon, receive at least one data from transmitter; And
Receive the designator whether said transmitter of indication need expand to channel time the non-channel reservation time from said transmitter.
39. according to the described method of claim 38, wherein, the said designator that is used for channel time expansion (CTE) is to be set to 1 CTE bit.
40., further comprise: after receiving said CTE bit, make powering mode invalid switching to resting state, and continue to monitor packet from said transmitter according to the described method of claim 39.
41. according to the described method of claim 38, wherein, the said designator that is used for channel time expansion (CTE) is to be set to 0 CTE bit.
42. according to the described method of claim 41, wherein, when said transmitter did not need further channel time to expand, said CTE bit was set to 0.
43., further comprise: divide into groups in case said receiving equipment sends ACK in response to the packet that comprises said designator, just no longer continue monitored data and divide into groups, and switch to resting state according to the described method of claim 41.
44. receiving equipment that is used for receiving data with wireless data; Said receiving equipment is intended to be used for the channel reservation time durations by the telegon distribution; Receiving at least one data from transmitter divides into groups; And receive the information that is used for channel time expansion (CTE) from said transmitter; And after the said information that receives CTE; At said non-channel reservation time durations, receive packet from said transmitter.
45. according to the described receiving equipment of claim 44, wherein, the said non-channel reservation time is the channel time that said telegon is not distributed to any equipment.
46. according to the described receiving equipment of claim 44, wherein, the channel time of said channel reservation time or non-reservation comprises at least one channel time blocks.
47., wherein,, when the reception of said at least one packet is not accomplished, receive the information that is used for the channel time expansion from said transmitter when at said channel reservation time durations according to the described receiving equipment of claim 44.
48. according to the described receiving equipment of claim 44, wherein, the said information that is used for channel time expansion is included in last packet of said at least one packet that said channel reservation time durations receives.
CN201080011636.6A 2009-06-09 2010-02-22 Method and device for transmitting and receiving data in wireless network CN102349340B (en)

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