WO2008101424A1 - Dispositif de balise, procédé et système pour indiquer l'état de la balise - Google Patents

Dispositif de balise, procédé et système pour indiquer l'état de la balise Download PDF

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Publication number
WO2008101424A1
WO2008101424A1 PCT/CN2008/070236 CN2008070236W WO2008101424A1 WO 2008101424 A1 WO2008101424 A1 WO 2008101424A1 CN 2008070236 W CN2008070236 W CN 2008070236W WO 2008101424 A1 WO2008101424 A1 WO 2008101424A1
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WO
WIPO (PCT)
Prior art keywords
beacon
message
status
superframe
transmit
Prior art date
Application number
PCT/CN2008/070236
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English (en)
Chinese (zh)
Inventor
Linjun Lv
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008101424A1 publication Critical patent/WO2008101424A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel

Definitions

  • the present invention relates to the field of network communication technologies, and in particular, to a beacon device and a beacon status indication method and system. Background of the invention
  • SP Frequency Sharing
  • LU Local Area Network
  • SU Simple User
  • the SU system uses this band to ensure that it does not affect the LU system.
  • the wireless coverage radius is about 500 meters, and the randomness of the used frequency band is high. It is difficult for the SU system to effectively protect the LU system. Therefore, for such LU systems, The devices of the SU system prevent interference to the LU system through wireless sensing, and some beacon devices need to be arranged to protect the LU user's services from being affected.
  • IEEE 802.22 technology belongs to a class of SU systems.
  • the industry has proposed a beacon technology specification to protect low-power LUs in the TV band from interference.
  • the cartridge is to introduce the technical specification:
  • the beacon device detects and acquires channel occupation information of the LU device, and exchanges the detected channel occupation information on a wireless air interface channel, and finally transmits the channel occupation information to the SU, for example, a WRAN device, and the SU according to the channel of the LU device. Occupy information to conduct business to avoid interference with the LU system.
  • a beacon device is selected as a PPD (first protection device) for controlling and managing beacon transmission of the beacon device within a certain range; Other beacon devices are classified as SPDs (second protection devices).
  • the PPD may combine other SPD information to control the transmission of other SPD beacons.
  • the superframe structure of the transmitted signal of the beacon device can be roughly divided into four parts:
  • a synchronization burst phase comprising a series of synchronization bursts transmitted by the PPD device, each synchronization burst consisting of a synchronization header and a decrementing indication, wherein an indication of each synchronization burst The values are decremented one by one, and are reduced from N to 1;
  • the beacon phase is a beacon transmitted by the protection device, the beacon includes a synchronization burst, a beacon PSDU (physical service data unit), wherein the indication of the synchronization burst is equal to 0, PPD or SPD Both can send beacons to exchange LU occupied channel information.
  • the beacon phase is a beacon transmitted by the protection device, the beacon includes a synchronization burst, a beacon PSDU (physical service data unit), wherein the indication of the synchronization burst is equal to 0, PPD or SPD Both can send beacons to exchange LU occupied channel information.
  • SPD sends an RTS (Send Request) to notify the PPD through this phase, and wishes to send a beacon to the PPD;
  • ANP phase (ACK or NACK phase), at this stage, the PPD can send an ACK through the ANP, indicating that the SPD that agrees to send the RTS on the Rx period on the superframe sends a request in the beacon phase of the next superframe;
  • a NACK may be sent through the ANP to indicate that the SPD that sent the RTS on the Rx period on the superframe rejects the request to transmit the beacon in the beacon phase of the next superframe.
  • the beacon transmission control differs from that of FIG. 1 in that: the synchronization phase and the beacon phase are simultaneously performed, and are respectively modulated to the I and Q paths of the signal.
  • FIG. 3 is a process in which the PPD separately transmits a beacon to the SPD
  • FIG. 4 is a process in which the SPD transmits a beacon to the PPD under the control of the PPD.
  • the above process corresponds to the transmission of the superframe, and the process thereof is as shown in FIG. 5.
  • FIG. 5 is a process of information exchange between the PPD and the SPD device:
  • Figures 5-A and 5-A1 show the PPD transmission synchronization phase and the beacon.
  • the PPD receives an RTS sent by the SPD, and then the PPD sends an ACK on the superframe ANP, agreeing that the SPD is on the next superframe. Send a beacon.
  • FIGS 5-B and 5-B1 show the PPD transmission synchronization phase, in which the beacon is transmitted by the SPD (which is agreed to transmit the beacon by the PPD on the previous superframe). However, no RTS is received on the Rx period, so on the ANP, the PPD sends a NACK, rejecting any SPD to send a beacon on the next superframe.
  • Figures 5-C and 5-C1 show that on the third superframe, the PPD device transmits the synchronization phase. Since the RTS is not received on the previous superframe, the beacon is transmitted by itself; if the PPD does not receive one on the Rx period In RTS, the PPD sends a NACK on the ANP. If the PPD receives an RTS on the Rx period, the PPD sends an ACK on the ANP.
  • each SPD needs to send an RTS to send data and services to the PPD on the next superframe. If there are multiple SPDs that send RTS in the Rx period, a collision will occur and the PPD will not allow any SPD to send beacons on the next superframe.
  • the main object of the present invention is to provide a beacon status indication method and system for a beacon device and a beacon device.
  • the technical solution of the present invention includes:
  • a beacon status indication method for a beacon device includes:
  • a beacon device in the beacon device group transmits a beacon message carrying a beacon status indicating whether the next super frame needs to continue to transmit the beacon;
  • the first protection device of the beacon device group determines, according to the beacon status carried in the beacon message, each beacon device in the beacon device group to send a beacon message permission in the next super frame.
  • a second protection device comprising: a message receiving/transmitting module, configured to receive/send a beacon message or a contention request message;
  • the beacon status identification module is configured to identify, in a beacon message sent by the message receiving/transmitting module, a beacon status indicating whether the next super frame needs to continue to transmit the beacon.
  • a first protection device comprising: a message receiving/transmitting module, configured to receive/send a beacon message or a contention request message;
  • a beacon status determining module configured to determine, according to the beacon status carried in the beacon message, the right of each beacon device to send a beacon in the next superframe
  • the beacon sending indication module is configured to notify the beacon device of the right to send the beacon message in the next super frame according to the authority determined by the beacon status determining module.
  • a beacon status indication system for a beacon device comprising:
  • the embodiment of the present invention further provides a beacon status indication system of a beacon device, which includes a plurality of beacon devices, wherein the beacon device is divided into a first protection device and a second protection device, and each beacon device identifies the beacon message. Indicates whether the next superframe needs to continue to transmit the beacon status of the beacon, The first protection device determines, according to the beacon status, the right of each beacon device in the next superframe to send a beacon message.
  • the embodiment of the present invention adds the beacon status content to the transmitted beacon message, so that if a complete beacon information of a beacon device is not sent, the continuation is continued.
  • the beacon message is sent on the next superframe. The delay in the complete transmission of beacon information is avoided.
  • FIG. 1 is a schematic diagram 1 of a superframe structure for transmitting signals of a prior art beacon device
  • FIG. 2 is a schematic diagram 2 of a superframe structure for transmitting signals of a prior art beacon device
  • FIG. 3 is a schematic diagram of a prior art PPD transmitting a beacon to an SPD separately;
  • FIG. 4 is a schematic diagram of a prior art SPD transmitting a beacon to a PPD under PPD control
  • Figure 5-A, Figure 5- ⁇ 1, Figure 5-B, Figure 5- ⁇ 1, Figure 5-C, and Figure 5-C1 are schematic diagrams of the information exchange process between the PPD and the SPD corresponding to the superframe in the prior art;
  • FIG. 6 is a block diagram of an embodiment of the system of the present invention. Mode for carrying out the invention
  • An embodiment of the present invention provides a beacon status indication method of a beacon device, by adding a field indicating a beacon status to a message of the beacon, so that the PPD controls transmission of each SPD beacon message according to the status information.
  • the added field can be set within the MAC layer of the beacon message.
  • a plurality of beacon devices set for protecting the LU device are referred to as a beacon device group.
  • This embodiment adds a beacon state by the MAC header of the beacon message in the superframe.
  • the indication field is implemented, and the field may be set by the PPD or by the SPD.
  • the content and format of the beacon MAC header field are as follows:
  • Parameter 1 ( Parameterl ), the information bits include: beacon version, priority, antenna height and device type information;
  • Parameter 2 (Parameter 2), the information bit includes: keepout zone information, which is used to indicate whether the protected radius is greater than 500m;
  • Parameter 3 (Parameter3), the information bit includes the antenna position and the time indicating that the protected device also needs to occupy the channel;
  • the sender flag bit (ParentCallsign), the information bit is the tag of the beacon sender; the location information bit (Location), the information bit is used to store the location information of the beacon sender; the subchannel map (SubchannelMap), the information bit
  • the type is a bitmap with a valid range of 48 bits, which is used to store the channel mask used by the protection device for reuse.
  • Timestamp bit (TimeStamp), this information bit is used to indicate the time when the beacon is transmitted; the payload bit (Payload), which is used to indicate the information byte carried by the beacon.
  • Adding a field indicating the status of the beacon to the MAC header may be added to the content of each parameter, or a field indicating the status of the beacon may be added. This embodiment is only described by adding the parameter in the Parameter2 field as an example, in other parameters, The settings in the field are similar.
  • the Parameter2 field structure is as follows: Bits: 0-6 7
  • the added fields are as follows: The NST is used to indicate whether the next superframe needs to continue to transmit beacons. For the PPD, the next superframe is the last superframe of the current frame; for the SPD, the next superframe is the PPD determines the most recent subsequent superframe that is sent to all SPDs to transmit the beacon.
  • the flag bit can be combined with the device rank field in Parameterl to cause the beacon device receiving the beacon to determine whether the next superframe needs to transmit a beacon through the combined field.
  • the meaning of the device type and the value of the NST represents an embodiment as follows:
  • the device type of the beacon takes a value of 0, indicating that the beacon is sent by the SPD;
  • the device type of the beacon has a value of 1 , indicating that the beacon is sent by the PPD;
  • NST The value of NST is 0, indicating that the beacon sent by other beacon devices is sent in the next superframe.
  • the NST value is 1 , indicating that the beacon transmitted by the original beacon device is continuously sent in the next super frame; of course, it can also be defined by the following embodiment:
  • the device type of the beacon has a value of 0, indicating that the beacon is sent by the PPD;
  • the device type of the beacon has a value of 1 , indicating that the beacon is sent by the SPD;
  • the NST value is 0, indicating that the beacon sent by the original beacon device is continuously sent in the next superframe.
  • NST The value of NST is 1, indicating that the beacon sent by other beacon devices is sent in the next superframe.
  • the correspondence between the value of each field and the beacon and the state of the superframe is only the case of the present invention in the present embodiment. In different embodiments of the present invention, the corresponding relationship can be adjusted.
  • the beacon device after determining the meaning of the value of the device type field and the NST field, the beacon device, that is, the PPD or the SPD, assigns a value to the type field and the NST field of the beacon sent by the beacon when transmitting the beacon to indicate the status information of the beacon.
  • the beacon device assigns a value to the type field and the NST field of the beacon sent by the beacon when transmitting the beacon to indicate the status information of the beacon.
  • the SPD can send the RTS on the Rx period to compete for the beacon on the next superframe.
  • State 2 The device type is set to 1 and the NST value is set to 1.
  • the PPD needs to continue to transmit the beacon in the next superframe, and the other SPDs cannot transmit the RTS in the Rx period, and the PPD information can be preferentially broadcasted.
  • State 4 The device type value is set to 0, and the NST value is set to 1.
  • the PPD device still distributes the SPD to the SPD during the beacon transmission phase on the next superframe, and continues to issue its beacon information.
  • the PPD controls the transmission of beacons in the next superframe according to the status information of different beacons, and selects by transmitting ACK, GO-ON (continue message) or NACK on the ANP. For example: the PPD sends an ACK on the ANP, indicating that the new SPD is sent to send a beacon message, rejecting the original SPD or the PPD to continue to send the message; the PPD sends a GO-ON message on the ANP, indicating that the original SPD or the PPD continues to send the beacon message. Reject the new SPD to send a message. The PPD sends a NACK on the ANP, indicating that all SPDs are rejected to send beacon messages on the next superframe, and the PPD itself sends a message on the next superframe; the specific method is as follows:
  • the device type value is set to 1 and the NST value is set to 0:
  • the PPD transmitting the beacon does not continue to transmit the beacon in the next superframe, so the PPD allows other SPDs to send an RTS to the PPD requesting to transmit the beacon in the next superframe;
  • the PPD When only the PPD requires the beacon to be transmitted in the next superframe, the PPD directly transmits the beacon in the next superframe;
  • the PPD When an SPD sends an RTS to the PPD requesting to send a beacon in the next superframe, the PPD sends an ACK message to the SPD, agreeing that the SPD sends the beacon in the next superframe;
  • the PPD may reject all SPD requests in order to avoid possible collisions and delays caused by collisions, and do not allow any SPD to send a message in the next superframe.
  • Target and the PPD itself sends a beacon in the next superframe.
  • the device type value is set to 1 and the NST value is set to 1:
  • the PPD transmitting the beacon continues to transmit the beacon in the next superframe, and the PPD rejects any SPD request to transmit the beacon.
  • the device type value is set to 0, and the NST value is set to
  • the PPD allows other beacon devices to contend for transmitting beacons in the next superframe;
  • the other beacon devices include a PPD or multiple SPDs;
  • the PPD When only the PPD requires the beacon to be transmitted in the next superframe, the PPD directly transmits the beacon in the next superframe;
  • the SPD When only one SPD requests to transmit a beacon in the next superframe, the SPD sends an RTS to the PPD requesting the PPD to allow it to transmit a beacon in the next superframe, and the PPD sends an ACK message to the SPD, agreeing that the SPD is in the next superframe. Sending a beacon;
  • each SPD When multiple SPDs simultaneously request to send a beacon in the next superframe, each SPD sends an RTS request to the PPD.
  • the PPD receives multiple SPDs to send an RTS request, the PPD avoids possible conflicts and conflicts. Delay, reject all SPD requests, do not allow any SPD to send a beacon in the next superframe, and the PPD itself sends a beacon in the next superframe; or allow the original protection device to continue to send beacons The protection device continues to send beacons.
  • the PPD may allow the SPD transmitting the beacon in the current superframe to continue to transmit the beacon in the next superframe;
  • the PPD may determine whether it is necessary to continue to transmit the beacon message according to the currently transmitted beacon content, and the PPD may According to the judgment result, selection is made by transmitting ACK, GO-ON (continue message) or NACK on the ANP. For example: PPD sends an ACK on the ANP, indicating that the new SPD sends a beacon message, rejects the original beacon device to continue to send the message; the PPD sends a GO-ON message on the ANP, indicating that the original beacon device continues to agree. Send a beacon message, rejecting the new beacon device to send a message. The PPD sends a NACK on the ANP, indicating that all SPDs are rejected to send a beacon message on the next superframe, and the PPD itself sends the message.
  • An embodiment of the present invention provides a beacon status indication system of a beacon device, where the system includes a plurality of beacon devices, where the beacon device includes at least one first protection device PPD and at least one second protection device SPD.
  • a schematic diagram of an embodiment is shown in FIG. 6, which includes: a beacon status identification module, configured to identify a beacon status in a sent beacon message; and the method includes: adding a corresponding one in a MAC layer a field indicating a beacon state, such as adding the field in a corresponding parameter in the MAC header; using the field to identify a beacon state;
  • the beacon status identification module may be disposed on all beacon devices, including the first protection device or the second protection device;
  • a message receiving/transmitting module for receiving/transmitting a beacon message or RTS.
  • the specific functions are: sending a beacon message after the RTS or beacon status identification module identifies the beacon status; or receiving a message sent by another beacon device, and forwarding the message to the beacon status determination module.
  • the module is placed on all beacon devices.
  • the beacon status determining module is configured to determine the beacon status according to the beacon message, and determine the right of each beacon device to send the beacon in the next superframe; the module is only disposed on the first protection device PPD.
  • the beacon sending indication module is configured to send a beacon sending indication to each beacon device according to the judgment result of the beacon state judging module, and notify each beacon device of the right to transmit the beacon message in the next super frame.
  • the module is only disposed on the first protection device.
  • the embodiment of the present invention further provides a beacon status indication system of a beacon device, including: an indication beacon device that identifies, in a transmission beacon message, a beacon status indicating whether the next super frame needs to continue to transmit a beacon; and Determining, according to the beacon status, each beacon device of the next superframe The first protection device in the beacon device group that grants the authority of the beacon message.
  • the indication beacon device may be the second protection device or the first protection device in the beacon device group.
  • the second protection device includes: a message receiving/transmitting module, configured to receive/transmit a beacon message or a contention request message; and a beacon status And an identifier module, configured to identify, in a beacon message sent by the message receiving/transmitting module, a beacon state indicating whether the next superframe needs to continue to send the beacon.
  • the first protection device comprises: a message receiving/transmitting module, a beacon state judging module and a beacon sending indication module.
  • the message receiving/transmitting module is configured to receive/send a beacon message or a contention request message.
  • the beacon status determining module is configured to determine, according to the beacon status carried in the beacon message, the right of each beacon device to send the beacon in the next superframe.
  • the beacon sending indication module is configured to notify the beacon device of the right to send the beacon message in the next super frame according to the authority determined by the beacon status determining module.
  • the first protection device further includes a beacon status identification module, configured to identify, in the beacon message sent by the message receiving/transmitting module, a beacon status indicating whether the next super frame needs to continue to transmit the beacon.
  • a beacon status identification module is configured to add a corresponding field indicating a beacon status to the MAC header to identify the beacon status.
  • the first protection device may include a message receiving/transmitting module, a beacon state determining module, and a beacon sending indication module, and may further include a beacon status identifying module.
  • a beacon status identification module can also be further included.
  • the beacon status identification module is configured to identify, in a beacon message sent by the message receiving/transmitting module, a beacon status indicating whether the next super frame needs to continue to transmit the beacon.
  • the first protection device completes, in the sending beacon message, identifies a beacon state indicating whether the next superframe needs to continue to transmit the beacon, and determines, according to the beacon state, the next superframe, each beacon device sends the beacon. The operation of the permission of the message.
  • the beacon device of the present invention increases the beacon status content in the transmitted beacon message, so that when a complete beacon information of a beacon device is not transmitted, The beacon message is sent continuously on the next superframe, avoiding the delay of complete transmission of the beacon information.

Abstract

L'invention concerne un dispositif de balise, un procédé et un système pour indiquer l'état de la balise. Le système comprend un dispositif indicateur de balise pour indiquer si la supertrame suivante continue à envoyer l'état de la balise dans un message d'envoi de balise; et un premier dispositif de protection, qui se situe dans des groupes de dispositifs de balise et détermine pour chaque balise si celle-ci peut envoyer le message de balise de la supertrame suivante selon l'état de la balise.
PCT/CN2008/070236 2007-02-16 2008-02-01 Dispositif de balise, procédé et système pour indiquer l'état de la balise WO2008101424A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200710073351.5 2007-02-16
CNA2007100733515A CN101247296A (zh) 2007-02-16 2007-02-16 一种信标设备及信标状态指示方法及系统

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WO2008101424A1 true WO2008101424A1 (fr) 2008-08-28

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Publication number Priority date Publication date Assignee Title
CN101202612B (zh) * 2006-12-15 2010-08-18 华为技术有限公司 一种信标设备及信标状态指示方法及系统

Citations (5)

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Publication number Priority date Publication date Assignee Title
CN1520100A (zh) * 2002-12-02 2004-08-11 三星电子株式会社 用于减少特殊网络中的功率消耗的装置和方法
WO2006043242A1 (fr) * 2004-10-20 2006-04-27 Koninklijke Philips Electronics, N.V. Systeme et procede d'adaptation dynamique de debit et de puissance de transmission au moyen d'un protocole de balisage
CN1771693A (zh) * 2003-06-30 2006-05-10 诺基亚公司 短程无线终端的自适应功率节省模式
EP1667375A1 (fr) * 2004-08-31 2006-06-07 Matsushita Electric Industrial Co., Ltd. Procédé de communication sans fil et dispositif de communication sans fil
JP2006295751A (ja) * 2005-04-14 2006-10-26 Sony Corp 無線通信装置，無線通信システム，無線通信方法，およびコンピュータプログラム

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1520100A (zh) * 2002-12-02 2004-08-11 三星电子株式会社 用于减少特殊网络中的功率消耗的装置和方法
CN1771693A (zh) * 2003-06-30 2006-05-10 诺基亚公司 短程无线终端的自适应功率节省模式
EP1667375A1 (fr) * 2004-08-31 2006-06-07 Matsushita Electric Industrial Co., Ltd. Procédé de communication sans fil et dispositif de communication sans fil
WO2006043242A1 (fr) * 2004-10-20 2006-04-27 Koninklijke Philips Electronics, N.V. Systeme et procede d'adaptation dynamique de debit et de puissance de transmission au moyen d'un protocole de balisage
JP2006295751A (ja) * 2005-04-14 2006-10-26 Sony Corp 無線通信装置，無線通信システム，無線通信方法，およびコンピュータプログラム

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