WO2009059560A1 - Procédé pour contrôler l'initialisation d'un dispositif de protection et dispositif pour le mettre en oeuvre - Google Patents

Procédé pour contrôler l'initialisation d'un dispositif de protection et dispositif pour le mettre en oeuvre Download PDF

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Publication number
WO2009059560A1
WO2009059560A1 PCT/CN2008/072929 CN2008072929W WO2009059560A1 WO 2009059560 A1 WO2009059560 A1 WO 2009059560A1 CN 2008072929 W CN2008072929 W CN 2008072929W WO 2009059560 A1 WO2009059560 A1 WO 2009059560A1
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WIPO (PCT)
Prior art keywords
protection device
initialization
physical layer
transmission process
management entity
Prior art date
Application number
PCT/CN2008/072929
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English (en)
Chinese (zh)
Inventor
Jianwei Zhang
Xuesheng Zhu
Ke Wang
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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 WO2009059560A1 publication Critical patent/WO2009059560A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access

Definitions

  • the embodiments of the present invention relate to the field of communications technologies, and in particular, to a method and a device for controlling initialization of a protection device. Background technique
  • the IEEE 802.22.1 standard defines a Protecting Device (PD) or Beaconing Device to form a Beaconing Network to enhance the authorization of low-power authorized primary user equipment (such as wireless microphones). Protection, which facilitates frequency sharing with unauthorized devices.
  • PD Protecting Device
  • Beaconing Device to form a Beaconing Network to enhance the authorization of low-power authorized primary user equipment (such as wireless microphones). Protection, which facilitates frequency sharing with unauthorized devices.
  • the beacon transmissions in the beacon network are broadcast, and the transmitted data can be received and processed by any device within the coverage of the network.
  • the protection devices in the beacon network are classified into a Primary Protecting Device (PPD) and a Secondary Protecting Device (SPD).
  • PPD Primary Protecting Device
  • SPD Secondary Protecting Device
  • the access of the primary protection device to the wireless channel, the beacon data of the other protection device is integrated, and is responsible for broadcasting all the beacon information in the beacon network; the protection device is responsible for the protection of the low-power authorized device in a part of the area, and the letter is protected.
  • the content is sent to the primary user device.
  • the IEEE 802.22.1 standard defines a special secondary protection device, the Next-in-line Protecting Device (NDD).
  • the steps for device initialization are as follows:
  • the protection device is initialized first after being powered on.
  • Each protection device listens to a number of superframe periods on a designated television channel to determine if a primary protection device is present on the channel. If the primary protection device is not detected, the protection device is promoted to be the primary protection device and starts to send the beacon frame; if the presence of one or more primary protection devices is detected, the protection device may decide to become the primary protection device and start Send your own beacon frame, or become a slave protection device and try to contact one of the primary protection devices.
  • the primary protection device should select a secondary protection device as an alternate protection device. If the primary protection device stops transmitting beacons, the alternate protection device will be promoted as the primary protection device, and the other secondary protection devices will eventually contact the new primary protection device. The new primary protection device should select one of the secondary protection devices to become new.
  • Alternative protection device should select one of the secondary protection devices to become new.
  • the architecture of the protection device is based on the multi-layer structure of the Open System Interconnection (OSI) seven-layer model, as shown in Figure 1. Each layer is responsible for a part of the agreement and provides services to the upper level. And Medium Access Control (MAC) sublayer.
  • the physical layer includes a wireless transceiver and an underlying control mechanism to provide bit transmission services to the MAC layer.
  • the medium access control sublayer provides access services for physical channels and performs MAC frame assembly and decomposition.
  • the next higher layer (NHL) is not part of the standard, but because the upper layer performs the selection of the working channel, determines the working mode of the protection device (becomes the primary protection device or the protection device), starts/stops the transmission of the beacon frame, and processes The functions of the received beacon frame, the fused data, and the error handling the security mechanism, the high-level behavior is very important to protect the normal operation of the device, so the IEEE 802.22.1 standard describes the behavior of the high-level in the appendix.
  • SAPs Service Access Points
  • MLME MAC sublayer Management Entity
  • PLME Physical Layer Management Entity
  • the superframe structure of the IEEE 802.22.1 system is shown in Figure 2.
  • a superframe period is divided into 31 slots, the first 30 slots are used to transmit beacon data, which is hereinafter referred to as the beacon period, and the 31st slot is used as inter-device communication period. , ICP ), hereinafter referred to as the inter-device communication period.
  • the superframe during the beacon period is divided into two channels: the Synchronization channel and the beacon channel.
  • the synchronization channel contains 30 Sync bursts for superframe synchronization; the beacon channel is used to transmit MAC beacon frames.
  • the inter-device communication period is further divided into two parts: the receiving period (Rx period) and the response period (Acknowledgement/No acknowledgement period, ANP).
  • the inter-device communication period is one slot length, including 32 modulation symbols, including a reception period of 8 symbol lengths and a response period of 8 symbol lengths, as shown in FIG.
  • the protection device can send an RTS (Request to Send) request within the receiving period, and the primary protection device responds to the RTS request within the receiving period and then receives or rejects the response within the subsequent response period. If the primary protection device receives the RTS request, the corresponding ACK (Acknowledgement) codeword is sent during the response period; if the primary protection device rejects the RTS request, the NACK (No Acknowledgement) codeword is sent during the response period.
  • RTS Request to Send
  • the primary protection device After the primary protection device is initialized, it needs to broadcast the beacon frame so that other protection devices can detect its presence and contact it to report the relevant protection information.
  • the initial transmission process of the primary protection device lasts for 100 super frame periods. In this process, only the primary protection device sends a beacon frame, so there is no need to set the communication period between devices, and the synchronization is sent on the synchronization channel corresponding to the 31st time slot. Burst, all zeros are sent on the beacon channel.
  • the structure of the superframe during the initialization of the primary protection device is shown in Figure 4.
  • the primitive interaction between the upper layer of the protocol stack, the MAC sublayer, and the physical layer is as shown in FIG. 5, and includes the following steps:
  • step s501 the upper layer transmits the information and control information of the beacon frame to the MAC sublayer through the MLME-START-BEACON.request primitive.
  • step s502 the MAC sublayer returns a confirmation message to the upper layer through the MLME-START-BEACON.confirm primitive.
  • Step s503 After receiving the request, the MAC sublayer generates a MAC Protocol Data Unit (MPDU) according to the information and control information of the beacon frame, and after setting the state of the transceiver, passes the PD-DATA.request. The primitive sends a send request to the physical layer.
  • MPDU MAC Protocol Data Unit
  • Step s504 After receiving the request, the physical layer encodes the MAC sublayer protocol data unit to generate a physical layer protocol data unit (PPDU) and fills 4 bytes of zero bits, and then on the beacon channel. Send, generate 31 synchronization bursts at the same time, and send on the synchronization channel.
  • PPDU physical layer protocol data unit
  • the initial transmission process of the primary protection device lasts for 100 superframe periods. If the primary protection device is not detected, the protection device is promoted as the primary protection device and starts to send the beacon frame; The presence of multiple primary protection devices that can decide to become the primary protection device and begin to send their own beacon frames, or become slave protection devices and attempt to contact one of the primary protection devices.
  • the MLME-START-BEACON.request primitive defines two parameters, Start and Periodic, to control the transmission of beacon frames, as shown in Table 1:
  • the primary protection device For the primary protection device, if the beacon of the periodic transmission is started, set Start to “true” and Periodic to “true”; if the beacon of the transmission cycle is stopped, set Start to "false”. If The primary protection device sends only one beacon, and the control parameters are set to "true” for Start and "false” for periodic.
  • the slave protection device it can only send one beacon continuously, so the control parameters can only be set to "true” for Start and "false” for periodic.
  • the superframe structure sent during the initial protection device initialization transmission does not include the inter-device communication period, so the physical layer of the primary protection device must transmit the synchronization burst on the synchronization channel corresponding to the 31st time slot, and on the beacon channel. Send 4 bytes of zero bits. However, the physical layer of the primary protection device does not know whether the device is in the process of initializing the transmission, and cannot determine whether or not to include the communication period between devices. Summary of the invention
  • Embodiments of the present invention provide a method and device for controlling initialization of a protection device, for identifying whether a primary protection device is in an initialization transmission phase, controlling whether a superframe structure includes an inter-device communication period, and controlling an initialization transmission process of the primary protection device. .
  • an embodiment of the present invention provides a method for controlling initialization of a protection device, including:
  • the embodiment of the present invention further provides an apparatus for controlling initialization of a protection device, including a high layer entity, a MAC sublayer management entity, and a physical layer management entity, including:
  • a high-level entity configured to send an information frame to the MAC sub-layer management entity
  • a MAC sub-layer management entity configured to indicate, according to the information frame sent by the high-layer entity, whether the protection device of the physical layer management entity is in an initialization transmission process
  • the embodiment of the present invention has the following advantages: According to the behavior of the primary protection device in the initialization transmission process, a method for controlling whether the primary protection device includes the communication period between the devices is designed, so that the upper layer of the device, The control of the control information can be transmitted between the MAC sublayer and the physical layer, and the structure of the protocol stack is improved. Through proper primitive design, the primitive interaction between the MAC sublayer and the physical layer is reduced, and the efficiency of the protocol stack is improved.
  • FIG. 1 is a schematic structural diagram of a protection device in the prior art
  • FIG. 2 is a schematic diagram of a superframe structure in the prior art
  • FIG. 3 is a schematic diagram of a communication period between devices in the prior art
  • FIG. 5 is a schematic flowchart of initial transmission of a primary protection device in the prior art
  • FIG. 6 is a flowchart of a method for initializing a control protection device according to Embodiment 1 of the present invention
  • FIG. 7 is a schematic diagram of a process for initializing transmission of a primary protection device according to Embodiment 1 of the present invention
  • FIG. 8 is a schematic structural diagram of a device for controlling initialization of a protection device according to Embodiment 2 of the present invention. detailed description
  • Embodiment 1 of the present invention A method for controlling initialization of a protection device is provided in Embodiment 1 of the present invention. As shown in FIG. 6, the method includes the following steps:
  • Step s601 Receive an information frame sent by a high layer of the protection device.
  • Step s602 Indicate, according to the information frame, whether the physical layer protection device is in an initialization transmission process.
  • the method for initializing the above-mentioned control protection device will be described in detail below in conjunction with a specific application scenario.
  • the high-level protection device decides to become the primary protection device after completing the device initialization, it is ready to start the initialization transmission process.
  • the upper layer transmits the information and control information of the beacon frame to the MAC sublayer through the MLME-START-BEACON.req uest primitive. Add a control parameter Initialize to the primitive, as shown in Table 2.
  • the MAC sublayer After the MAC sublayer receives the MLME-START-BEACON.request request, if the Initialize parameter is true, a timer T of length alnializationPeriod is started, and the current device of the physical layer is notified to initialize the transmission process, and the communication period between the devices needs to be corresponding. Synchronization burst is generated on the synchronization channel of the 31st time slot, and 4 bytes of zero bits are transmitted on the beacon channel; if the Initialize parameter is false or the timer T times out, the physical layer device is notified that the initialization transmission process has been completed. . Therefore a constant alnitializationPeriod is defined in the MAC sublayer as shown in Table 3, as well as the PLME-INITIALIZE.request and PLME-INITIALIZE.confirm primitives.
  • the constant description takes the value of the alnitializationPeriod primary protection device when it initializes the transmission with 100 super-intervals.
  • Frame period The PLME-INITIALIZE.request primitive is a physical layer management entity that the MAC sublayer management entity of the primary protection device generates and sends to it, and whether the physical layer includes the communication period between devices. This primitive has a Start parameter, as shown in Table 4.
  • the physical layer After receiving the primitive, if the Start parameter is true, the physical layer knows that the primary protection device is preparing to initiate transmission, and then constructs a superframe according to the format of the received MAC sublayer protocol data unit according to the format of FIG. 4 and periodically transmits; If the Start parameter is false, the periodic transmission is stopped.
  • the PLME-INITIALIZE.confirm primitive is the physical layer management entity of the primary protection device and is sent to its MAC sublayer management entity as a response to the PLME-INITIALIZE.request primitive.
  • the parameters of this primitive are shown in Table 5 below.
  • the upper layer of the protocol stack when the primary protection device performs initial transmission, the upper layer of the protocol stack,
  • step s701 the upper layer passes the MLME-START-BEACON.request primitive, and carries the control parameter Initialize in the primitive.
  • the control parameter Initialize is true in the flowchart, that is, the primary protection device is ready to start the initialization process, and the beacon frame information is used. And control information is passed to the MAC sublayer.
  • step s702 the MAC sublayer returns a confirmation message to the upper layer through the MLME-START-BEACON.confirm primitive.
  • Step s703 If the MAC sublayer determines that the Initialize parameter is true, the PLME-INITIALIZE. request primitive (the Start parameter in the primitive is true) notifies the physical device that the current device is in the initial transmission process, and needs to correspond to the communication period between the devices. A sync burst is generated on the sync channel of the 31st slot, and 4 bytes of zero bits are transmitted on the beacon channel. And start a timer T of length alnitializationPeriod.
  • Step s704 The physical layer passes the PLME-INITIALIZE-confirm primitive, and the primitive carries the Status parameter, and sends the status parameter to the MAC sublayer as a response to the foregoing step s703.
  • Step s705 After receiving the PLME-INITIALIZE.confirm, the MAC sublayer generates a MAC sublayer protocol data unit according to the information of the beacon frame and the control information, and sets the state of the transceiver to the physical layer through the PD-DATA.request primitive. Send a request.
  • Step s706 After receiving the request, the physical layer returns a confirmation message to the MAC sublayer by using a PD-DATA.confirm primitive. And encoding the MAC sub-layer protocol data unit to generate a physical layer protocol data unit, and padding 4 bytes of zero bits, and then transmitting on the beacon channel, simultaneously generating 31 synchronization bursts, and transmitting on the synchronization channel,
  • the superframe structure is shown in Figure 4.
  • Step s707 if the timer T times out, that is, after the physical layer sends 100 superframes, the MAC sublayer sends a PLME-INITIALIZE.request primitive to the physical layer (the Start parameter is false), to notify the physical layer protection device to initialize.
  • the transmission is completed, and the superframe structure transmitted thereafter includes the inter-device communication period.
  • Step s708 the physical layer sends the MAC sublayer through the PLME-INITIALIZE-confirm primitive as a response to step s707.
  • the Initialize parameter is added to the MLME-START-BEACON.request primitive; the alnializationPeriod parameter is added to the MAC sublayer; the PLME-INITIALIZE.request primitive and the PLME-INITIALIZE.confirm primitive are added, so that the physical layer can obtain the beacon frame according to the above parameters. Whether to include the communication period between devices, and information identifying whether the primary protection device is in or completing the initialization transmission process.
  • a method for controlling whether the primary protection device includes the communication period between the devices is designed, so that the upper layer of the device, the MAC sublayer, and the physical
  • the control information can be transmitted between the layers, and the structure of the protocol stack is improved.
  • the primitive interaction between the MAC sublayer and the physical layer is reduced, and the efficiency of the protocol stack is improved.
  • the second embodiment of the present invention further provides a device for controlling initialization of a protection device, as shown in FIG. 8, which includes:
  • the upper layer entity 10 is configured to send an information frame to the MAC sublayer management entity 20.
  • the information frame can be sent by the MLME-START-BEACON.request primitive.
  • the primitive also carries the control parameter Initialize, which is used to indicate whether the primary protection device is in the initial transmission process.
  • the MAC sublayer management entity 20 is configured to indicate, according to the information frame sent by the high layer entity 10, whether the physical layer management entity protects the device 30 whether it is in the initialization transmission process.
  • the indication may be a PLME-INITIALIZE.request primitive indicating whether the physical layer includes an inter-device communication period in the transmitted superframe.
  • the physical layer management entity 30 is configured to manage the entity 20 according to the MAC sublayer.
  • the MAC sublayer management entity 20 further includes:
  • the timing unit 21 is configured to notify the physical layer management entity that the protection device is in a process of initializing the transmission, and starts a timer.
  • the indicating unit 22 is configured to indicate, according to the information frame sent by the high-layer entity 10, whether the physical layer management entity 30 is in the initialization transmission process, and when the timing unit 21 exceeds the device provided by using the foregoing embodiment of the present invention, according to the primary protection device At the beginning In the process of transmission, a method of controlling whether the primary protection device includes the communication period between devices is designed, so that the control information can be transmitted between the upper layer, the MAC sublayer and the physical layer of the device, and the structure of the protocol stack is improved. . Through proper primitive design, the primitive interaction between the MAC sublayer and the physical layer is reduced, and the efficiency of the protocol stack is improved.
  • the present invention can be implemented by hardware or by software plus a necessary general hardware platform.
  • the technical solution of the present invention may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including several The instructions are for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé pour contrôler l'initialisation d'un dispositif de protection (PD) et son dispositif de mise en oeuvre, le procédé comprenant les étapes suivantes: réception de la trame d'informations provenant de la couche supérieure du dispositif de protection; indication permettant de savoir si la couche physique du dispositif de protection est fondée sur ladite trame lors du processus d'initialisation. A partir des actions du dispositif de protection lors du processus de transmission d'initialisation, un procédé permet de vérifier si le dispositif de protection comprenant un intervalle de communications entre les dispositifs est conçu pour réaliser une transmission d'informations de contrôle entre la couche supérieure, la sous-couche MAC, et la couche physique.
PCT/CN2008/072929 2007-11-05 2008-11-04 Procédé pour contrôler l'initialisation d'un dispositif de protection et dispositif pour le mettre en oeuvre WO2009059560A1 (fr)

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CN2007101696157A CN101431397B (zh) 2007-11-05 2007-11-05 一种控制保护设备初始化的方法和设备
CN200710169615.7 2007-11-05

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1205603A (zh) * 1997-05-05 1999-01-20 诺基亚流动电话有限公司 通信系统中无线链接协议的动态设备
KR20030058472A (ko) * 2001-12-31 2003-07-07 트라이콤텍 주식회사 단거리 전용 고속 무선 통신 기반의 차량 탑재 장치
US20040165534A1 (en) * 2002-07-25 2004-08-26 Claseman George R. Operations, administration and maintenance (OAM) systems and methods for packet switched data networks
CN1700701A (zh) * 2004-05-21 2005-11-23 英特尔公司 对基于链路的系统互连进行物理层初始化的方法和装置
CN1735063A (zh) * 2004-07-09 2006-02-15 索尼株式会社 信息处理设备、方法及程序
CN1792050A (zh) * 2003-03-25 2006-06-21 诺基亚有限公司 传输参数信息

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1205603A (zh) * 1997-05-05 1999-01-20 诺基亚流动电话有限公司 通信系统中无线链接协议的动态设备
KR20030058472A (ko) * 2001-12-31 2003-07-07 트라이콤텍 주식회사 단거리 전용 고속 무선 통신 기반의 차량 탑재 장치
US20040165534A1 (en) * 2002-07-25 2004-08-26 Claseman George R. Operations, administration and maintenance (OAM) systems and methods for packet switched data networks
CN1792050A (zh) * 2003-03-25 2006-06-21 诺基亚有限公司 传输参数信息
CN1700701A (zh) * 2004-05-21 2005-11-23 英特尔公司 对基于链路的系统互连进行物理层初始化的方法和装置
CN1735063A (zh) * 2004-07-09 2006-02-15 索尼株式会社 信息处理设备、方法及程序

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CN101431397B (zh) 2012-08-08

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