WO2013067941A1 - 一种分配标识的方法及装置 - Google Patents

一种分配标识的方法及装置 Download PDF

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Publication number
WO2013067941A1
WO2013067941A1 PCT/CN2012/084272 CN2012084272W WO2013067941A1 WO 2013067941 A1 WO2013067941 A1 WO 2013067941A1 CN 2012084272 W CN2012084272 W CN 2012084272W WO 2013067941 A1 WO2013067941 A1 WO 2013067941A1
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Prior art keywords
access point
identifier
terminal
target
beacon frame
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PCT/CN2012/084272
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English (en)
French (fr)
Inventor
丁志明
方平
树贵明
杨讯
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华为终端有限公司
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Publication of WO2013067941A1 publication Critical patent/WO2013067941A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/26Network addressing or numbering for mobility support

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and apparatus for assigning an identifier. Background technique
  • a Wi-Fi application terminal hereinafter referred to as a STA (station, a terminal such as a user equipment in this application)
  • a STA station, a terminal such as a user equipment in this application
  • the AP assigns a STA to the STA.
  • Association ID AID The AP periodically sends a beacon frame, and the AP uses a TIM (traffic indication map) mechanism to indicate whether the STA that has been associated with the AP has downlink data in the beacon frame, that is, whether the AP is buffered to be sent to the STA.
  • the data is not limited to indicate whether the STA that has been associated with the AP has downlink data in the beacon frame, that is, whether the AP is buffered to be sent to the STA.
  • the STA can request downlink data from the AP, so that the STA can sleep to save power during the period when the AP sends the beacon frame without data transmission.
  • BSS ID Basic Service Set Identifier
  • channel resources of one AP can be allocated to different types of users.
  • the BSSID is also the MAG address of the AP, which can also be called the access point identifier.
  • An AP that supports multiple BSS IDs transmits a beacon frame with different BSS IDs as the primary BSS ID.
  • the so-called primary BSS ID refers to the address segment where the BSS ID appears at the head of the beacon frame, and the multiple BSSIDs supported by the AP are included.
  • the BSSID other than the primary BSSID is used as the secondary BSSID, and the secondary BSSID and its associated information are encapsulated in the secondary BSSID information element, appearing in the beacon frame.
  • the load portion is also referred to as a transport BSS ID (tr an sm it ted BSS ID) in the standard, and the secondary BSS ID is also referred to as a non-transmted BSS ID in the standard. Multiple BSS IDs share the same BSS ID mechanism
  • AID space in order to support the broadcast data transmission indication of each BSS ID, a number of bits in the local valid bit table in the TIM element are used to indicate whether each BSS ID has broadcast data, so an AP can support the number of STAs less than 2007.
  • an AP can only allocate at most 2007 STAo invention content based on the compatibility of the T I M mechanism in the existing standard.
  • Embodiments of the present invention provide a method and apparatus for assigning an identity, which can be allocated over 2007 STAs based on the TIM mechanism compatible with existing standards.
  • the broadcast beacon frame instructing, by each of the multiple access point identifiers, the broadcast beacon frame to be the primary access point identifier, where the beacon frame includes the to-be-transmitted data indication information and the secondary identifier of the primary access point identifier.
  • the target access point identifier Assigning, according to the target access point identifier, an associated identifier in the independent associated identifier space identified by the target access point, and sending an association response message to the terminal, where the association response message includes Describe the target access point identifier and the associated identifier.
  • a method of assigning an identifier comprising:
  • association response message sent by the access point, where the association response message includes the target access point identifier and an association identifier, where the association identifier is the target access allocated by the access point to a terminal An identifier in the independent associated identity space identified by the point.
  • An access point where the access point has multiple access point identifiers, and each of the access points is identified with an independent associated identifier space, where the access point includes:
  • a broadcast unit configured to identify, by using each of the multiple access point identifiers, a broadcast beacon frame as a primary access point identifier, where the beacon frame includes the primary access point identifier to be transmitted.
  • Data indicating information and information identified by the secondary access point, where the secondary access point identifier is an access point identifier of the plurality of access point identifiers other than the primary access point identifier;
  • a receiving unit configured to receive an association request message sent by the terminal, where the target access point identifier included in the association request message is an access point identifier of the multiple access point identifiers;
  • an allocation sending unit configured to allocate, according to the target access point identifier, an associated identifier in the independent associated identifier space identified by the target access point, and send an association response message to the terminal, where The association response message includes the target access point identifier and the association identifier.
  • a terminal comprising:
  • a parsing unit configured to parse the received beacon frame sent by the access point, and select a target access point identifier, where the access point has multiple access point identifiers, and each of the access point identifiers Independent associated identification space;
  • a sending unit configured to send an association request message to the access point, where the association request message includes the target access point identifier;
  • a receiving unit configured to receive an association response message sent by the access point, where the association response message includes the target access point identifier and an association identifier, where the association identifier is allocated by the access point for a terminal An identifier in the independent associated identifier space identified by the target access point.
  • An embodiment of the present invention provides a method and an apparatus for assigning an identifier, by sequentially identifying, by each of the multiple access point identifiers, a broadcast beacon frame as a primary access point identifier, and when the access point receiving terminal sends the identifier After the association request message, the terminal allocates an association identifier in the independent association identifier space identified by the target access point according to the target access point identifier in the association request message, and sends an association to the terminal. Response message.
  • an AP can only allocate a maximum of 2007 STAs.
  • each BSS ID has its own independent AID space, thereby More than 2007 STAo drawing instructions can be assigned based on the TIM mechanism compatible with existing standards
  • FIG. 1 is a flowchart of a method for allocating an identifier according to Embodiment 1 of the present invention
  • FIG. 2 is a flowchart of another method for assigning an identifier according to Embodiment 1 of the present invention
  • FIG. 3 is provided according to Embodiment 1 of the present invention; a block diagram of an access point;
  • FIG. 4 is a block diagram of another terminal according to Embodiment 1 of the present invention.
  • FIG. 5 is a flowchart of a method for allocating an identifier according to Embodiment 2 of the present invention
  • FIG. 6 is a block diagram of an access point according to Embodiment 2 of the present invention
  • FIG. 7 is a block diagram of another terminal according to Embodiment 2 of the present invention. detailed description
  • An embodiment of the present invention provides a method for allocating an identifier.
  • the access point has multiple access point identifiers, and each of the access points identifies an independent associated identifier space. As shown in FIG. 1 , the method includes:
  • Step 101 Identify, in each of the multiple access point identifiers, a broadcast beacon frame by using the access point identifier, where the beacon frame includes the data indication to be transmitted that is identified by the primary access point.
  • the access point identifier is the MAG (Media Access Control) address of the access point, and the MAG address is used as the identifier of the wireless (wireless bandwidth) network. Multiple access point identifiers mean one connection. There are multiple MAG addresses at the ingress.
  • the access point identifies the broadcast beacon frame as the primary access point identifier in each of the plurality of access point identifiers in the order of the size of the MAG address, and repeats the loop.
  • the beacon frame is sent by the access point to the surrounding terminal.
  • the access point may be an AP
  • the terminal may be an STA.
  • the AP may also send a probe to the STA after receiving the probe request frame. Response frame. If the STA sends the probe request frame by using the broadcast BSS ID, that is, the probe request frame is a broadcast frame, the AP sends a probe response frame to the STA by using the current primary BSSID, that is, the BSS ID filled in the frame header of the probe response frame is Current primary BSSID. If the STA sends a probe request frame to the AP with a specific BSSID, that is, the probe request frame is unicast, the AP also in the frame header of the probe response frame. Use the BSSID specified by this STA instead of the current primary BSSID of the AP.
  • the information that is identified by the secondary access point includes load information of the secondary access point identifier and/or data indication information to be transmitted that is identified by the secondary access point identifier;
  • the payload portion of the frame frame is described by a group access basic service set Identifier element (Grouped basic service set Identifier element), specifically, a MAG frame in a beacon frame or a probe response frame.
  • the BSS ID field of the header is filled with the BSSID, such a BSSID is referred to as the primary BSSID of the frame; the BSSID other than the primary BSSID is the secondary BSSID, and the payload portion in the beacon frame or the probe response frame is described using the G-BSSID element
  • the information of the secondary BSSID includes the capability information of the secondary BSSID, the SS ID (Service Set Identifier) to which the secondary BSSID belongs, and the data indication information to be transmitted identified by the secondary access point may be encapsulated in the G-BSSID information. In the element.
  • the beacon frame is transmitted by the BSSID supported by the AP as the primary BSSID, and the primary BSS ID in the beacon frame is the primary BSSID of the beacon period between the beacon frame and the next beacon frame.
  • the other BSSID is the secondary BSSIDo of this beacon period.
  • Step 102 Receive an association request message sent by the terminal, where the target access point identifier included in the association request message is one of the multiple access point identifiers. It should be noted that when the terminal scans After the access point, the received beacon frame sent by the access point is parsed and a target access point identifier is selected, and then the target access point identifier is carried in an association request message and sent to the access Point to establish an association.
  • Step 103 Allocate, according to the target access point identifier, an associated identifier in the independent associated identifier space identified by the target access point, and send an association response message to the terminal, where the association response is The message includes the target access point identifier and the association identifier.
  • Each BSSID has its own independent AID space, that is, each BSSID The AID space is not shared. Thus, based on the TIM mechanism, a BSSID can have up to 2007 AIDs. After applying multiple BSS ID mechanisms, it can support more than 2007 STAs. In the scope of the AP, to identify an associated STA, you need to use both the BSSID and the AID. The AID cannot be used to uniquely identify an STA. In this way, the data indication information to be transmitted under each BSS ID supported by the AP uses one TIM element, and for the primary BSSID of the beacon frame, the TIM element is an information element directly in the beacon frame, and in the beacon frame.
  • the TIM element under the secondary BSS ID may be included in the G-BSSID information element as a sub-information element in the G-BSS ID information element. If the beacon frame contains only the TIM element under the primary BSSID, that is, the data indication information to be transmitted to each terminal of the primary BSS ID, and the TIM element of the secondary BSSID is not included in the G-BSS ID element, it is equivalent to the access point taking turns.
  • Broadcasting data indication information ie, TIM
  • the beacon frame contains the TIM element of the primary BSSID and the TIM element of the secondary BSSID is included in the G-BSSID element, it means that the access point is
  • the beacon frame carries information to be transmitted (distributed in multiple TIM elements) of all terminals associated with the access point.
  • the access point communicates with the AP at any time, that is, sends a downlink message and/or receives an uplink message, or the access point identifies the target access point as the primary access point.
  • the identified beacon period uses the channel to send downlink messages and/or receive uplink messages.
  • a method for allocating an identifier by sequentially identifying, by each of the multiple access point identifiers, a broadcast beacon frame as a primary access point identifier, when the access point receives the sent by the terminal After the association request message, the terminal allocates an association identifier in the independent association identifier space identified by the target access point, and sends an association response to the terminal, according to the target access point identifier in the association request message.
  • an AP can only allocate a maximum of 2007 STAs.
  • each BSSID has its own independent AID space, so that Allocated over the compatibility of TIM mechanisms in existing standards 2007 STAs.
  • Another embodiment of the present invention provides a method for assigning an identifier. As shown in FIG. 2, the method includes:
  • Step 201 Parse the received beacon frame sent by the access point to select a target access point identifier, where the access point has multiple access point identifiers, and each of the access point identifiers has an independent identifier. Associated identifier space;
  • the terminal scans randomly, and after scanning the discovery of the access point, parses the related information of the primary access point identifier and the information of the secondary access point identifier in the received beacon frame sent by the access point, and selects an access.
  • the point identifier is used as a target access point identifier, and the related information includes capability information and/or load information;
  • Step 202 Send an association request message to the access point, where the association request message includes the target access point identifier.
  • Step 203 Receive an association response message sent by the access point, where the association response message includes the target access point identifier and an association identifier, where the association identifier is the An identifier in the independent associated identifier space identified by the target access point.
  • the terminal After receiving an association identifier in the independent association identifier space of the target access point identifier allocated by the terminal, the terminal periodically listens to the beacon frame of the target access point identifier according to the selected target access point. And parsing the TIM element in the beacon frame to obtain downlink data, where the beacon frame includes the to-be-transmitted data indication information that is identified by the primary access point and the to-be-transmitted data indication information that is identified by the secondary access point identifier,
  • the secondary access point identifier is an access point identifier of the plurality of access point identifiers other than the primary access point identifier.
  • the maximum length of the "local valid bit table" of the TIM element is 251 bytes, where each One bit represents a STA, and the position of the bit is the AID of the STA. When the bit value is 1, it indicates that there is downlink data. When the bit is 0, it indicates that there is no downlink data.
  • the terminal uses the channel to receive the downlink message or send the uplink message at any time; the terminal uses the channel to receive the downlink message or send the uplink message in the beacon period identified by the target access point identifier as the primary access point identifier. .
  • a method for allocating an identifier by parsing a beacon frame sent by an access point and selecting a target access point identifier, sending an association request message to the access point, where the association request message includes The target access point identifier receives an association response message sent by the access point, where the association response message includes the target access point identifier and the association identifier allocated for the terminal.
  • an AP can only allocate a maximum of 2007 STAs.
  • each BSS ID has its own independent AID space, thereby More than 2007 STAs can be allocated based on the TIM mechanism compatible with existing standards.
  • An embodiment of the present invention provides an access point, where the access point has multiple access point identifiers, and each of the access points identifies an independent associated identifier space.
  • the access point includes : The broadcasting unit 301, the receiving unit 302, and the transmitting unit 303.
  • the broadcast unit 301 is configured to identify a broadcast beacon frame as a primary access point identifier by using each of the multiple access point identifiers, where the beacon frame includes the primary access point identifier Transmitting the data indication information and the information of the secondary access point identifier, where the secondary access point identifier is an access point identifier of the multiple access point identifiers other than the primary access point identifier;
  • the receiving unit 302 is configured to receive an association request message sent by the terminal, where the target access point identifier included in the association request message is one of the multiple access point identifiers;
  • the allocation sending unit 303 allocates, to the terminal, one associated identifier in the independent associated identifier space identified by the target access point, and sends an association response message to the terminal, where the association The target access point is included in the response message Identification and the associated identification.
  • the access point is a device, which is composed of a series of hardware and necessary software.
  • the hardware includes, but is not limited to, at least one processor, memory, radio frequency transceiver, input device/output device, buffer, etc., each of which is coupled by a bus.
  • An access point provided by the embodiment of the present invention is configured to identify, by the broadcast unit, each of the multiple access point identifiers as a primary access point to identify a broadcast beacon frame, and the receiving unit receives the association sent by the terminal. And the request sending message, according to the target access point identifier, the allocation sending unit allocates one associated identifier in the independent associated identifier space of the target access point identifier to the terminal, and sends an association response message to the terminal.
  • an AP can only allocate a maximum of 2007 STAs.
  • each BSS ID has its own independent AID space, thereby More than 2007 STAs can be allocated based on compatibility with TIM mechanisms in existing standards.
  • the embodiment of the present invention provides a terminal, which may be a STA.
  • the terminal includes: a parsing unit 401, a sending unit 402, and a receiving unit 403.
  • the parsing unit 401 is configured to parse the received beacon frame sent by the access point to select a target access point identifier, where the access point has multiple access point identifiers, and each of the access point identifiers Have independent associated identifier space;
  • the sending unit 402 is configured to send an association request message to the access point according to the selected target access point identifier, where the association request message includes the target access point identifier;
  • the receiving unit 403 is configured to receive the association response message sent by the access point, where the association response message includes the target access point identifier and the association identifier, and the association
  • the identifier is an identifier in the independent associated identifier space identified by the target access point allocated by the access point for the terminal.
  • the terminal involved in the embodiment of the present invention is composed of a series of hardware and necessary software.
  • the hardware includes, but is not limited to, at least one processor, a memory, a radio frequency transceiver, an input device/output device, a buffer, etc., each of which is coupled by a bus.
  • the parsing unit parses the received beacon frame sent by the access point and selects a target access point identifier, and the sending unit sends an association request message to the access point, where The association request message includes the target access point identifier, and the receiving unit receives an association response message sent by the access point, where the association response message includes the target access point identifier and an association identifier, where the association identifier is An identifier in the independent associated identifier space identified by the target access point allocated by the access point for the terminal.
  • an AP can only allocate a maximum of 2007 STAs based on the TIM mechanism in the existing standard.
  • each BSSID has its own independent AID space, so that More than 2007 STAs are allocated based on the TIM mechanism compatible with existing standards.
  • An embodiment of the present invention provides a method for allocating an identifier, where the access point has multiple access point identifiers, and each of the access points identifies an independent associated identifier space. As shown in FIG. 5, the method includes:
  • Step 501 The access point AP identifies, in each of the multiple access point identifiers, a broadcast beacon frame as a primary access point identifier, where the beacon frame includes the primary access point. And the information about the to-be-transmitted data indication information and the information of the secondary access point identifier, where the secondary access point identifier is an access point identifier of the multiple access point identifiers other than the primary access point identifier;
  • the access point identifier is the MAG (Media Access Control) address of the access point, and the MAG address is used as the WiFi (wireless f idelity). With the identification of the network, multiple access point identification means that one access point has multiple MAG addresses.
  • the access point identifies the broadcast beacon frame as the primary access point identifier in each of the plurality of access point identifiers in the order of the size of the MAG address, and repeats the loop.
  • the beacon frame is sent by the AP to the surrounding STAs.
  • the AP may also send a probe response frame to the STA after receiving the probe request frame. If the STA sends the probe request frame by using the broadcast access point identifier BSSID, that is, the probe request frame is a broadcast frame, the AP sends a probe response frame to the STA by using the current primary BSSID, that is, the frame header of the probe response frame is filled in.
  • the BSSID is the current primary BSSID.
  • the AP If the STA sends a probe request frame to the AP with a specific BSSID, that is, the probe request frame is unicast, the AP also uses the BSS ID specified by the STA instead of the AP in the frame header of the probe response frame. Current primary BSSID.
  • the information that is identified by the secondary access point includes load information of the secondary access point identifier and/or data indication information to be transmitted that is identified by the secondary access point;
  • the payload portion of the beacon frame is described by a Grouped Basic Service Set Identifier element (Specialized Service Set Element), specifically, in a beacon frame or a probe response frame.
  • the BSS ID field of the MAG frame header is filled with the BSSID, such a BSSID is referred to as the primary BSSID of the frame; the BSSID other than the primary BSSID is the secondary BSSID, and the payload portion of the beacon frame or the probe response frame uses the G-BSSID
  • the element describes the information of the secondary BSSID, including the load information of the secondary BSSID, the SS ID (Service Set Identifier) to which the secondary BSSID belongs, and the data indication information to be transmitted identified by the secondary access point may be a sub-information element. Encapsulated in the G-BSSID information element.
  • the TIM information in the sub-BSSID is carried in the beacon frame is optional, where the TIM information is the data indication information to be transmitted.
  • the beacon frame carries the TIM information in the sub-BSSID
  • the beacon frame carries the downlink to-be-transmitted data indication information of all the STAs in the AP.
  • the beacon frame does not carry the TIM information in the sub-BSSID
  • AP wheel The TIM information of each BSS ID is sent by the stream.
  • the beacon frame is transmitted with the supported BSSID as the primary BSSID, then the primary BSSID in the beacon frame is the primary BSSID of the beacon period between the beacon frame and the next beacon frame,
  • the other BSSIDs in this cycle are the secondary BSSIDs of this beacon period, and the interval between adjacent two beacon frames is called B1 (Beacon Interval).
  • Step 502 After scanning the access point, the STA parses the received beacon frame sent by the access point and selects a target access point identifier.
  • the STA scans randomly, and after parsing the AP, parses the information related to the primary BSSID in the beacon frame or the probe response frame, and encapsulates the secondary BSSID in the G-BSSID element in the beacon frame or the probe response frame.
  • the related information is parsed to obtain capability information of each BSSID, where the capability information includes the number of terminals that the BSSID can load, and the related information includes capability information and/or load information.
  • Manner 1 parsing the information about the primary access point identifier and the information of the secondary access point identifier in the received beacon frame sent by the access point, and selecting an access point identifier as the target access point identifier.
  • the related information includes capability information and/or load information; specifically, a BSS ID with a large number of loadable terminals may be selected to facilitate management of the AP;
  • the primary BSSID is selected as the target BSSID; it should be noted that only one primary BSS I D information may be carried in a beacon frame or a probe response frame, and multiple secondary BSSID information may be carried;
  • Manner 3 Select the target BSSIDo according to the indication carried in the beacon frame sent by the AP.
  • each BSSID shares Bl, and the SAT may use the channel at any time; it may also specify that each BSSID is not Sharing Bl, the STA uses the channel in the beacon period to which the target BSSID belongs according to the selected BSSID.
  • Step 503 The STA sends an association request message to the AP, where the association request message includes the target access point identifier.
  • the target BSS I D is carried in the association request message and sent to the AP.
  • the terminal uses the channel to send an uplink message at any time; when each BSS ID does not share the BI, the terminal uses the channel to send the beacon period identified by the target access point as the primary access point identifier. Upstream message.
  • Step 504 The AP receives an association request message sent by the STA, where the target access point identifier included in the association request message is one of the multiple access point identifiers;
  • the access point When the BSSIDs share the BI, the access point sends a downlink message to the terminal by using the channel at any time; when each BSSID does not share the BI, the access point identifies the primary access point with the target access point.
  • the identified beacon period uses the channel to send downlink messages to the terminal.
  • Step 505 Allocate, according to the target access point identifier, an associated identifier in the independent associated identifier space identified by the target access point, and send an association response message to the terminal, where the association response message is sent.
  • the target access point identifier and the associated identifier are included in the identifier;
  • the STA After the STA selects the BSS I D, the STA establishes an association relationship with the AP.
  • the AID (association ID) has a value range of 1-2007.
  • a multi-BSSID mechanism is adopted, where the BSSID functions as a group number, and the TIM mechanism and AID allocation under one BSSID are the same as the prior art.
  • each BSSID has its own independent AID. Space, in this way, an AP can support up to 6021 STAs with three BSSIDs, and more STAs can be supported with more BSSIDs.
  • Step 506 The STA receives an association response message sent by the access point, where the association response message includes the target access point identifier and an association identifier, where the association identifier is allocated by the access point. An identifier in the independent associated identifier space identified by the target access point;
  • Step 507 the STA periodically listens to the beacon frame identified by the target access point, and parses the data indication information to be transmitted in the beacon frame to obtain the data indication information of the terminal to be transmitted.
  • the beacon frame includes the to-be-transmitted data indication information that is identified by the primary access point and the to-be-transmitted data indication information that is identified by the secondary access point identifier, where the secondary access point identifier is the An access point identifier other than the primary access point identifier.
  • the maximum length of the "local valid bit table" of the TIM element is 251 bytes, where each bit represents one STA, the position of the bit is the AID of the STA, and when the bit value is 1, it indicates that there is downlink data, when the bit is 0, indicating no downlink data. That is, the data indication information to be transmitted in the beacon frame is indicated by the bit position in the T I M element.
  • the terminal can communicate with the access point by using the channel to the AP at any time. Specifically, the terminal can use the channel to the AP at any time.
  • the downlink data is requested; or, in a scenario where each BSS ID does not share the BI, the terminal communicates with the access point by using a channel in the beacon period identified by the target access point identifier as the primary access point, specifically The terminal obtains downlink data by using a channel in a beacon period identified by the target access point as the primary access point identifier.
  • the AP communicates with the terminal by using a channel at any time. Specifically, the AP uses the channel to send downlink data to the associated STA at any time; or In a scenario where each BSS ID does not share a BI, the AP communicates with the terminal by using a channel in a beacon period that is identified by the target access point as a primary access point identifier. Specifically, the AP is in the office. Target access point identification The beacon period identified by the access point uses the channel to transmit downlink data.
  • the STA listens to the TIM information in two cases, if the beacon frame carries only the TIM information of the primary BSS ID, the STA only needs to listen to the beacon when the target BSSID associated with the STA is the primary BSSID. Frame; otherwise, the STA may only listen to the beacon frame when the target BSSID associated with the STA is the primary BSSID, and may also listen to all beacon frames.
  • the TIM of the secondary BSSID can be added to the G-BSSID element, so that when the STA listens to any beacon frame, it can know whether it has downlink data.
  • An embodiment of the present invention provides a method for allocating an identifier, by sequentially identifying, by each of the multiple access point identifiers, a broadcast beacon frame as a primary access point identifier, and when the access point receives the association sent by the terminal After the request message, the terminal allocates an association identifier in the independent association identifier space identified by the target access point according to the target access point identifier in the association request message, and sends an association response message to the terminal. .
  • an AP can only allocate a maximum of 2007 STAs.
  • each BSSID has its own independent AID space, so that More than 2007 STAs are allocated based on compatibility with TIM mechanisms in existing standards.
  • the embodiment of the present invention provides an access point, where the access point has multiple access point identifiers, and each of the access points identifies an independent associated identifier space, and the device may be an AP, as shown in FIG.
  • the access point includes: a broadcasting unit 601, a receiving unit 602, an allocation transmitting unit 603, a first executing unit 604, and a second executing unit 605.
  • the broadcast unit 601 is configured to identify, by using each of the multiple access point identifiers, a broadcast beacon frame as a primary access point identifier, where the beacon frame includes the primary access point identifier Transmitting the data indication information and the information of the secondary access point identifier, where the secondary access point identifier is an access point identifier of the plurality of access point identifiers other than the primary access point identifier;
  • the information of the entry point identifier includes the load information of the secondary access point identifier and/or Or the data indication information to be transmitted identified by the secondary access point;
  • the data indication information to be transmitted identified by the secondary access point is described in the payload portion of the beacon frame as a secondary access point identification information element.
  • the beacon frame is parsed, and a target BSS ID is selected.
  • the receiving unit 602 is configured to receive an association request message sent by the terminal, where the target access point included in the association request message is included.
  • the identifier is an access point identifier of the plurality of access point identifiers;
  • the allocation sending unit 603 allocates one associated identifier in the independent associated identifier space identified by the target access point to the terminal, and sends an association response message to the terminal, where the association The target access point identifier and the association identifier are included in the response message.
  • the first execution unit 604 is configured to use the channel to communicate with the terminal at any time;
  • the second executing unit 605 is configured to use the channel to communicate with the terminal in a beacon period that is identified by the target access point as the primary access point identifier.
  • An access point provided by the embodiment of the present invention is configured to identify, by the broadcast unit, each of the multiple access point identifiers as a primary access point to identify a broadcast beacon frame, and the receiving unit receives the association sent by the terminal. And the request sending message, according to the target access point identifier, the allocation sending unit allocates one associated identifier in the independent associated identifier space of the target access point identifier to the terminal, and sends an association response message to the terminal.
  • an AP can only allocate a maximum of 2007 STAs.
  • each BSS ID has its own independent AID space, thereby More than 2007 STAs can be allocated based on compatibility with TIM mechanisms in existing standards.
  • An embodiment of the present invention provides a terminal, where the device can be a STA, as shown in FIG.
  • the terminal includes: a parsing unit 701, a parsing and selecting module 701 1, a first selecting module 701 2, a second selecting module 701 3, a sending unit 702, a receiving unit 703, a listening unit 704, a first executing unit 705, and a second execution.
  • the parsing unit 701 is configured to parse the received beacon frame sent by the access point to select a target access point identifier, where the access point has multiple access point identifiers, and each of the access point identifiers Have independent associated identifier space;
  • the parsing selection module 701 1 in the parsing unit 701 is configured to parse the received primary access point identifier related information and the secondary access point identifier related information in the received beacon frame sent by the access point. Selecting an access point identifier as the target access point identifier, where the related information includes capability information and/or load information;
  • the first selection module 701 2 in the parsing unit 701 is configured to select the primary access point identifier as a target access point identifier
  • the second selecting module 701 3 in the parsing unit 701 is configured to select a target access point identifier according to the indication carried in the beacon frame sent by the access point.
  • the sending unit 702 is configured to send an association request message to the access point, where the association request message includes the target access point identifier; and the access point receives the association sent by the terminal.
  • the terminal is assigned an association identifier according to the target access point identifier, and is sent to the terminal.
  • the receiving unit 703 is configured to receive an association response message sent by the access point, where the association response message includes The target access point identifier and the associated identifier assigned to the terminal.
  • the intercepting unit 704 is configured to periodically listen to the beacon frame of the target access point identifier, and parse the data indication information to be transmitted in the beacon frame to obtain the data indication information of the terminal to be transmitted.
  • the beacon frame includes the to-be-transmitted data indication information identified by the primary access point and the to-be-transmitted data indication information of the secondary access point identifier, where the secondary access point identifier is the An access point identifier other than the primary access point identifier.
  • the information identified by the secondary access point includes data to be transmitted identified by the secondary access point. Instructing information; the data indication information to be transmitted identified by the secondary access point is described by a secondary access point identification information element in a payload portion of the beacon frame.
  • the first executing unit 705 uses the channel to communicate with the access point at any time;
  • the second executing unit 706 uses the channel to communicate with the access point by using a beacon period identified by the target access point as the primary access point identifier.
  • the terminal After the terminal is scanned by the parsing unit to the access point, the terminal parses the received beacon frame sent by the access point and selects a target access point identifier, and the sending unit sends the access unit to the access point.
  • the point sends an association request message, where the association request message includes the target access point identifier, and the receiving unit receives an association response message sent by the access point, where the association response message includes the target access point identifier and the association identifier .
  • the AP can allocate only at most 2007 STAs.
  • each BSS ID is independent of the AID space. More than 2007 STAo can be allocated based on the TIM mechanism compatible with existing standards

Abstract

本发明公开一种分配标识的方法及装置,涉及通信技术领域,可以在兼容现有标准中的 TIM 机制的基础上为超过 2007 个 STA 分配关联标识。本发明实施例提供的方案,通过依次以多个接入点标识中的各个接入点标识为主接入点标识广播信标帧并在所述信标帧中包含副接入点标识相关信息,当接入点接收终端发送的关联请求消息后,根据关联请求消息中的目标接入点标识,为所述终端分配所述目标接入点标识的独立关联标识空间中的一个关联标识,并向所述终端发送关联响应消息。本发明实施例提供的方案适用于多基础服务集标识为大量终端分配关联标识时采用。

Description

一种分配标识的方法及装置 技术领域
本发明涉及通信技术领域, 尤其涉及一种分配标识的方法及装 置。 背景技术
按照 IEEE 802.11 标准, 一个 Wi-Fi 应用终端, 以下称为 STA (station,站,本申请中专指用户设备等终端)与 AP (access point, 接入点) 建立连接时, AP为 STA分配一个关联标识 AID。 AP周期性 发送信标帧, 并且 AP采用 TIM (traffic indication map, 传输指 示映射表) 机制在信标帧中指示已经关联到此 AP的 STA是否有下行 数据, 即 AP上是否緩存有待发送到 STA的数据。 如果有下行数据, STA可以向 AP索取下行数据, 这样, STA可以在 AP发信标帧之前没 有数据传输的时间段内休眠以省电。由于 T I M机制中定义一个信息元 素, 在信息元素中的"局部有效位表"的最大长度为 251 字节, 其中, 每一个比特代表一个 STA, 比特的位置就是 STA的 AID, 当比特值为 1 时, 表示有下行数据, 当比特位为 0时, 表示没有下行数据。 另外, AID=0不使用, 这样, 251 字节能支持的 STA为 251*8-1=2007, 即一 个 AP最多只能支持 2007个 STA。
另外, 按照 IEEE 802.11 标准中提出的多 BSS ID (Bas i c Serv i ce Set Identifier, 基本服务集) 机制, 可以将一个 AP的信道资源分 配给不同类型的用户。 BSSID也就是 AP的 MAG地址, 也可称为接入 点标识。 支持多 BSS I D的 AP轮流以不同的 BSS I D作为主 BSS I D发送 信标帧,所谓主 BSS I D是指这个 BSS I D出现在信标帧的头部的地址段, 而 AP支持的多个 BSSID中主 BSSID之外的 BSSID作为副 BSSID, 副 BSSID以及其相关的信息封装在副 BSSID信息元素中, 出现在信标帧 的载荷部分。主 BSS I D在所述标准中又称为传输 BSS I D ( t r an sm i t ted BSS I D ) , 副 BSS I D 在 所述标 准 中 又称 为 非传输 BSS I D (non-transm i tted BSS I D)。 多 BSS I D机制下多个 BSS I D共享同一个
A I D空间, 为了支持各个 BSS I D的广播数据传输指示, 将 T I M元素中 的局部有效位表中的若干比特用于指示每个 BSS I D是否有广播数据, 因此一个 AP能支持 STA的数量少于 2007个。
综上, 现有技术中在兼容现有标准中的 T I M 机制的基础上一个 AP最多只能分配 2007个 STAo 发明内容
本发明的实施例提供一种分配标识的方法及装置, 可以在兼容现 有标准中的 T I M机制的基础上分配超过 2007个 STA。
为达到上述目的, 本发明的实施例采用如下技术方案: 一种分配标识的方法, 所述接入点具有多个接入点标识, 每个所 述接入点标识有独立的关联标识空间, 包括:
依次以所述多个接入点标识中的各个接入点标识为主接入点标 识广播信标帧,所述信标帧中包含所述主接入点标识的待传输数据指 示信息和副接入点标识的信息,所述副接入点标识为所述多个接入点 标识中除所述主接入点标识之外的接入点标识;
接收终端发送的关联请求消息,所述关联请求消息中包含的目标 接入点标识是所述多个接入点标识中的一个接入点标识;
根据所述目标接入点标识, 为所述终端分配所述目标接入点标识 的独立关联标识空间中的一个关联标识,并向所述终端发送关联响应 消息, 所述关联响应消息中包含所述目标接入点标识和所述关联标 识。
一种分配标识的方法, 包括:
解析接收到的由所述接入点发送的信标帧选择一个目标接入点 标识, 所述接入点具有多个接入点标识, 每个所述接入点标识有独立 的关联标识空间;
向所述接入点发送关联请求消息,所述关联请求消息中包含所述 目标接入点标识;
接收所述接入点发送的关联响应消息,所述关联响应消息中包含 所述目标接入点标识和关联标识,所述关联标识是由所述接入点为终 端分配的所述目标接入点标识的独立关联标识空间中的一个标识。
一种接入点, 所述接入点具有多个接入点标识, 每个所述接入点 标识有独立的关联标识空间, 所述接入点包括:
广播单元, 用于依次以所述多个接入点标识中的各个接入点标识 为主接入点标识广播信标帧,所述信标帧中包含所述主接入点标识的 待传输数据指示信息和副接入点标识的信息,所述副接入点标识为所 述多个接入点标识中除所述主接入点标识之外的接入点标识;
接收单元, 用于接收终端发送的关联请求消息, 所述关联请求消 息中包含的目标接入点标识是所述多个接入点标识中的一个接入点 标识;
分配发送单元, 用于根据所述目标接入点标识, 为所述终端分配 所述目标接入点标识的独立关联标识空间中的一个关联标识,并向所 述终端发送关联响应消息,所述关联响应消息中包含所述目标接入点 标识和所述关联标识。
一种终端, 包括:
解析单元, 用于解析接收到的由所述接入点发送的信标帧选择一 个目标接入点标识, 所述接入点具有多个接入点标识, 每个所述接入 点标识有独立的关联标识空间;
发送单元, 用于向所述接入点发送关联请求消息, 所述关联请求 消息中包含所述目标接入点标识; 接收单元, 用于接收所述接入点发送的关联响应消息, 所述关联 响应消息中包含所述目标接入点标识和关联标识,所述关联标识是由 所述接入点为终端分配的所述目标接入点标识的独立关联标识空间 中的一个标识。
本发明实施例提供一种分配标识的方法及装置,通过依次以所述 多个接入点标识中的各个接入点标识为主接入点标识广播信标帧, 当 接入点接收终端发送的关联请求消息后,根据关联请求消息中的所述 目标接入点标识, 为所述终端分配所述目标接入点标识的独立关联标 识空间中的一个关联标识, 并向所述终端发送关联响应消息。 与现有 技术中, 在兼容现有标准中的 T I M机制的基础上一个 AP最多只能分 配 2007个 STA相比, 本发明实施例提供的方案, 每个 BSS I D由自己 独立的 A I D空间,从而可以在兼容现有标准中的 T I M机制的基础上分 配超过 2007个 STAo 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面 将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而 易见地, 下面描述中的附图仅仅是本发明的一些实施例, 对于本领域 普通技术人员来讲, 在不付出创造性劳动性的前提下, 还可以根据这 些附图获得其他的附图。
图 1 为本发明实施例 1提供的一种分配标识的方法的流程图; 图 2为本发明实施例 1提供的另一种分配标识的方法的流程图; 图 3为本发明实施例 1提供的一种接入点的框图;
图 4为本发明实施例 1提供的另一种终端的框图;
图 5为本发明实施例 2提供的一种分配标识的方法的流程图; 图 6为本发明实施例 2提供的一种接入点的框图;
图 7为本发明实施例 2提供的另一种终端的框图。 具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方 案进行清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部 分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普 通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例, 都属于本发明保护的范围。
实施例 1
本发明实施例提供一种分配标识的方法,所述接入点具有多个接 入点标识,每个所述接入点标识有独立的关联标识空间,如图 1 所示, 该方法包括:
步骤 101, 依次以所述多个接入点标识中的各个接入点标识为主 接入点标识广播信标帧,所述信标帧中包含所述主接入点标识的待传 输数据指示信息和副接入点标识的信息,所述副接入点标识为所述多 个接入点标识中除所述主接入点标识之外的接入点标识;
接入点标识是接入点的 MAG (Media Access Control , 介质访问 控制) 地址, 并以 MAG地址作为 WiFi (wireless f idel ity, 无线宽 带)网络的标识,多个接入点标识意味着一个接入点有多个 MAG地址。 接入点按照 MAG 地址的大小顺序依次以所述多个接入点标识中的各 个接入点标识为主接入点标识广播信标帧, 并反复循环。
需要说明的是,信标帧为接入点主动向周围的终端发送的,这里, 接入点可以为 AP, 终端可以为 STA, AP也可以在收到 STA的探测请 求帧之后向其发送探测响应帧。如果 STA使用广播的 BSS ID发送探测 请求帧, 即这个探测请求帧是广播帧, 则 AP以当前的主 BSSID向 STA 发送探测响应帧,也就是说探测响应帧的帧头中填写的 BSS I D是当前 主 BSSID。 如果 STA以 AP具有的某个特定的 BSSID向其发送探测请 求帧, 即这个探测请求帧是单播的, 则 AP在探测响应帧的帧头中也 使用这个 STA指定的 BSSID而不是 AP的当前主 BSSID。
另外,所述副接入点标识的信息包括所述副接入点标识的负载信 息和 /或所述副接入点标识的待传输数据指示信息; 所述副接入点标 识的信息在信标帧的载荷部分以副接入点标识信息元素 G-BSS I D (Grouped basic service set Identifier element, 组化的基础服 务集,)描述,具体地,在信标帧或者探测响应帧中的 MAG帧头的 BSS I D 域中填写有 BSSID,这样的 BSSID称为这个帧的主 BSSID;除主 BSSID 之外的 BSSID为副 BSSID, 在信标帧或者探测响应帧中的载荷部分使 用 G-BSSID元素描述副 BSSID的信息, 包括副 BSSID的能力信息、 副 BSSID所属的 SS ID (Service Set Identifier, 服务集标识) 等, 而 所述副接入点标识的待传输数据指示信息可以封装在 G-BSSID 信息 元素中。
对于 AP来说,轮流以 AP支持的各个 BSSID为主 BSSID发送信标 帧,那么这个信标帧中的主 BSS I D是这个信标帧到下一个信标帧之间 的信标周期的主 BSSID, 在这个周期中其它的 BSSID是这个信标周期 的副 BSSIDo
步骤 102, 接收终端发送的关联请求消息, 所述关联请求消息中 包含的目标接入点标识是所述多个接入点标识中的一个接入点标识; 需要说明的是, 当终端扫描到接入点后, 解析接收到的由所述接 入点发送的信标帧并选择一个目标接入点标识,然后将所述目标接入 点标识携带在关联请求消息中发送给所述接入点, 以建立关联关系。
步骤 103, 根据所述目标接入点标识, 为所述终端分配所述目标 接入点标识的独立的关联标识空间中的一个关联标识,并向所述终端 发送关联响应消息,所述关联响应消息中包含所述目标接入点标识和 所述关联标识。
各个 BSSID有自己独立的 AID 空间, 也就是说, 各个 BSSID的 AID空间不共享, 这样, 在 TIM机制的基础上, 一个 BSSID最多就可 以有 2007个 A I D,应用多 BSS I D机制后,就可以支持超过 2007个 STA。 而在 AP管辖的范围内, 标识一个已关联的 STA, 需要同时使用 BSSID 和 AID, 单独使用 AID不能再唯一标识一个 STA。 如此, AP支持的每 个 BSS I D下的待传输数据指示信息都使用一个 T I M元素,对于信标帧 的主 BSSID, 其 TIM元素是直接在信标帧中的信息元素, 而信标帧中 的 G-BSS I D信息元素中可以将副 BSS I D下的 T I M元素作为子信息元素 包含在 G-BSSID信息元素中。 如果信标帧中只包含主 BSSID下的 TIM 元素即关联到主 BSS I D各终端的待传输数据指示信息而在 G-BSS I D元 素中不包含副 BSSID的 TIM元素, 则相当于接入点轮流广播各 BSSID 下的待传输数据指示信息 (即 TIM); 如果信标帧中包含了主 BSSID 的 TIM元素, 又在 G-BSSID元素中包含了副 BSSID的 TIM元素, 则意 味着接入点在信标帧中携带了接入点关联的所有终端的待传输数据 指示信息 (分布在多个 TIM元素中)。
需要说明的是, 所述接入点在任何时间使用信道与 AP通信即发 送下行消息和 /或接收上行消息; 或者, 所述接入点在以所述目标接 入点标识为主接入点标识的信标周期使用信道发送下行消息和 /或接 收上行消息。
本发明实施例提供的一种分配标识的方法,通过依次以所述多个 接入点标识中的各个接入点标识为主接入点标识广播信标帧, 当接入 点接收终端发送的关联请求消息后,根据关联请求消息中的所述目标 接入点标识, 为所述终端分配所述目标接入点标识的独立关联标识空 间中的一个关联标识, 并向所述终端发送关联响应消息。 与现有技术 中,在兼容现有标准中的 T I M机制的基础上一个 AP最多只能分配 2007 个 STA相比, 本发明实施例提供的方案, 每个 BSSID 有自己独立的 AID空间, 从而可以在兼容现有标准中的 TIM机制的基础上分配超过 2007个 STA。
本发明实施例提供另一种分配标识的方法, 如图 2所示, 该方法 包括:
步骤 201, 解析接收到的由所述接入点发送的信标帧选择一个目 标接入点标识, 所述接入点具有多个接入点标识, 每个所述接入点标 识有独立的关联标识空间;
终端随机地扫描, 当扫描发现接入点后, 解析接收到的由所述接 入点发送的信标帧中的主接入点标识相关信息和副接入点标识相关 信息, 选择一个接入点标识作为目标接入点标识, 所述相关信息包括 能力信息和 /或负载信息;
或者选择所述主接入点标识为目标接入点标识;
或者根据所述接入点发送的信标帧中携带的指示,选择目标接入 点标识。
步骤 202, 向所述接入点发送关联请求消息, 所述关联请求消息 中包含所述目标接入点标识;
步骤 203, 接收所述接入点发送的关联响应消息, 所述关联响应 消息中包含所述目标接入点标识和关联标识,所述关联标识是由所述 接入点为终端分配的所述目标接入点标识的独立关联标识空间中的 一个标识。
当接收到为终端分配的所述目标接入点标识的独立关联标识空 间中的一个关联标识后, 根据选择的目标接入点, 终端周期性侦听所 述目标接入点标识的信标帧,并解析所述信标帧中的 T I M元素以便获 取下行数据,所述信标帧中包含所述主接入点标识的待传输数据指示 信息和副接入点标识的待传输数据指示信息,所述副接入点标识为所 述多个接入点标识中除所述主接入点标识之外的接入点标识。
T I M元素的 "局部有效位表" 的最大长度为 251 字节, 其中, 每 一个比特代表一个 STA, 比特的位置就是 STA的 A I D, 当比特值为 1 时, 表示有下行数据, 当比特位为 0时, 表示没有下行数据。
需要说明的是,终端在任意时间使用信道接收下行消息或发送上 行消息;所述终端在以所述目标接入点标识为主接入点标识的信标周 期使用信道接收下行消息或发送上行消息。
本发明实施例提供的一种分配标识的方法,通过解析接入点发送 的信标帧并选择一个目标接入点标识, 向所述接入点发送关联请求消 息, 所述关联请求消息中包含所述目标接入点标识, 接收所述接入点 发送的关联响应消息,所述关联响应消息中包含所述目标接入点标识 和为所述终端分配的所述关联标识。 与现有技术中, 在兼容现有标准 中的 T I M机制的基础上一个 AP最多只能分配 2007个 STA相比, 本发 明实施例提供的方案, 每个 BSS I D由自己独立的 A I D空间, 从而可以 在兼容现有标准中的 T I M机制的基础上分配超过 2007个 STA。
本发明实施例提供一种接入点, 所述接入点具有多个接入点标 识, 每个所述接入点标识有独立的关联标识空间, 如图 3所示, 该接 入点包括: 广播单元 301, 接收单元 302, 分配发送单元 303。
广播单元 301, 用于依次以所述多个接入点标识中的各个接入点 标识为主接入点标识广播信标帧,所述信标帧中包含所述主接入点标 识的待传输数据指示信息和副接入点标识的信息,所述副接入点标识 为所述多个接入点标识中除所述主接入点标识之外的接入点标识; 终端随机扫描发现 AP后, 接收单元 302, 用于接收终端发送的 关联请求消息,所述关联请求消息中包含的目标接入点标识是所述多 个接入点标识中的一个接入点标识;
根据所述目标接入点标识, 分配发送单元 303, 为所述终端分配 所述目标接入点标识的独立关联标识空间中的一个关联标识,并向所 述终端发送关联响应消息,所述关联响应消息中包含所述目标接入点 标识和所述关联标识。
需要说明的是: 本发明实施例中涉及到接入点为一个装置, 由一 系列硬件及必要的软件构成。 所述硬件包括但不限于至少一个处理 器, 存储器, 射频收发器, 输入设备 /输出设备, 緩存器等, 各个硬 件之间通过总线耦合。
本发明实施例提供的一种接入点,通过广播单元依次以所述多个 接入点标识中的各个接入点标识为主接入点标识广播信标帧,接收单 元接收终端发送的关联请求消息, 根据所述目标接入点标识, 分配发 送单元为所述终端分配所述目标接入点标识的独立关联标识空间中 的一个关联标识, 并向所述终端发送关联响应消息。 与现有技术中, 在兼容现有标准中的 T I M机制的基础上一个 AP最多只能分配 2007个 STA相比, 本发明实施例提供的方案, 每个 BSS I D由自己独立的 A I D 空间,从而可以在兼容现有标准中的 T I M机制的基础上分配超过 2007 个 STA。
本发明实施例提供一种终端, 具体可以为 STA, 如图 4所示, 该 终端包括: 解析单元 401, 发送单元 402, 接收单元 403。
解析单元 401, 用于解析接收到的由所述接入点发送的信标帧选 择一个目标接入点标识, 所述接入点具有多个接入点标识, 每个所述 接入点标识有独立的关联标识空间;
根据选择的所述目标接入点标识, 发送单元 402, 用于向所述接 入点发送关联请求消息,所述关联请求消息中包含所述目标接入点标 识;
当接入点为终端分配关联标识后, 接收单元 403, 用于接收所述 接入点发送的关联响应消息,所述关联响应消息中包含所述目标接入 点标识和关联标识,所述关联标识是由所述接入点为终端分配的所述 目标接入点标识的独立关联标识空间中的一个标识。 需要说明的是:本发明实施例中涉及到终端由一系列硬件及必要 的软件构成。 所述硬件包括但不限于至少一个处理器, 存储器, 射频 收发器, 输入设备 /输出设备, 緩存器等, 各个硬件之间通过总线耦 合。 本发明实施例提供的一种终端,通过解析单元解析接收到的由所 述接入点发送的信标帧并选择一个目标接入点标识, 发送单元向所述 接入点发送关联请求消息,所述关联请求消息中包含所述目标接入点 标识, 接收单元接收所述接入点发送的关联响应消息, 关联响应消息 中包含所述目标接入点标识和关联标识,所述关联标识是由所述接入 点为终端分配的所述目标接入点标识的独立关联标识空间中的一个 标识。 与现有技术中, 在兼容现有标准中的 TIM 机制的基础上一个 AP最多只能分配 2007个 STA相比, 本发明实施例提供的方案, 每个 BSSID由自己独立的 AID空间, 从而可以在兼容现有标准中的 TIM机 制的基础上分配超过 2007个 STA。
实施例 2
本发明实施例提供一种分配标识的方法,所述接入点具有多个接 入点标识,每个所述接入点标识有独立的关联标识空间,如图 5所示, 该方法包括:
步骤 501, 所述接入点 AP依次以所述多个接入点标识中的各个 接入点标识为主接入点标识广播信标帧,所述信标帧中包含所述主接 入点标识的待传输数据指示信息和副接入点标识的信息,所述副接入 点标识为所述多个接入点标识中除所述主接入点标识之外的接入点 标识;
接入点标识是接入点的 MAG (Media Access Control , 介质访问 控制) 地址, 并以 MAG地址作为 WiFi (wireless f idel ity, 无线宽 带)网络的标识,多个接入点标识意味着一个接入点有多个 MAG地址。 接入点按照 MAG 地址的大小顺序依次以所述多个接入点标识中的各 个接入点标识为主接入点标识广播信标帧, 并反复循环。
需要说明的是, 信标帧为 AP主动向周围的 STA发送的, AP也可 以在收到 STA的探测请求帧之后向其发送探测响应帧。如果 STA使用 广播的接入点标识 BSSID发送探测请求帧, 即这个探测请求帧是广播 帧, 则 AP以当前的主 BSSID向 STA发送探测响应帧, 也就是说探测 响应帧的帧头中填写的 BSSID是当前主 BSSID。 如果 STA以 AP具有 的某个特定的 BSSID向其发送探测请求帧, 即这个探测请求帧是单播 的, 则 AP在探测响应帧的帧头中也使用这个 STA指定的 BSS I D而不 是 AP的当前主 BSSID。
另外,所述副接入点标识的信息包括所述副接入点标识的负载信 息和 /或所述副接入点标识的待传输数据指示信息; 所述副接入点标 识的信息在所述信标帧的载荷部分以副接入点标识信息元素 G-BSS I D (Grouped basic service set Identifier element, 组化的基础服 务集,)描述,具体地,在信标帧或者探测响应帧中的 MAG帧头的 BSS I D 域中填写有 BSSID,这样的 BSSID称为这个帧的主 BSSID;除主 BSSID 之外的 BSSID为副 BSSID, 在信标帧或者探测响应帧中的载荷部分使 用 G-BSSID元素描述副 BSSID的信息, 包括副 BSSID的负载信息、 副 BSSID所属的 SS ID (Service Set Identifier, 服务集标识) 等, 而 所述副接入点标识的待传输数据指示信息可以以子信息元素封装在 G-BSSID信息元素中。
其中, 信标帧中是否携带副 BSSID下的 TIM信息是可选的, 这里 TIM信息即待传输数据指示信息。 当信标帧中携带副 BSSID下的 TIM 信息时, 说明每次信标帧都携带了 AP下所有 STA的下行待传输数据 指示信息, 当信标帧中没有携带副 BSSID下的 TIM信息时, 则 AP轮 流发送各 BSS I D的 T I M信息。
对于 AP来说,轮流以支持的各个 BSSID为主 BSSID发送信标帧, 那么这个信标帧中的主 BSSID 是这个信标帧到下一个信标帧之间的 信标周期的主 BSSID, 在这个周期中其它的 BSSID是这个信标周期的 副 BSSID, 相邻两个信标帧之间的间隔称为 Bl (Beacon Interval , 信标间隔)。
步骤 502, STA扫描到接入点后, 解析接收到的由所述接入点发 送的信标帧并选择一个目标接入点标识;
首先, STA随机地扫描, 当扫描发现 AP后, 对信标帧或者探测 响应帧中的主 BSSID相关的信息进行解析, 以及封装在信标帧或者探 测响应帧中的 G-BSSID元素中副 BSSID相关的信息进行解析,从而获 取各个 BSSID的能力信息,这里能力信息包括 BSSID可负载的终端数 目, 相关的信息包括能力信息和 /或负载信息。
然后, 选择一个目标 BSSID, 这里, 在选择目标 BSSID时, 可以 有三种方式:
方式一:解析接收到的由所述接入点发送的信标帧中的主接入点 标识相关信息和副接入点标识相关信息,选择一个接入点标识作为目 标接入点标识, 所述相关信息包括能力信息和 /或负载信息; 具体地, 可以选择可负载终端数目较多的 BSS I D, 以便于 AP的管理;
方式二: 选择所述主 BSSID为目标 BSSID; 需要说明的是, 在一 个信标帧或者探测响应帧中只携带一个主 BSS I D的信息, 可携带多个 副 BSSID的信息;
方式三: 根据所述 AP 发送的信标帧中携带的指示, 选择目标 BSSIDo
需要说明的是, 在 STA选择目标 BSSID后, 可以规定各个 BSSID 共享 Bl, 则 SAT可在任意时间使用信道; 也可以规定各个 BSSID不 共享 Bl, 则所述 STA根据选择的所述 BSSID, 在所述目标 BSSID所 属的信标周期使用信道。
步骤 503, 所述 STA向所述 AP 发送关联请求消息, 所述关联请 求消息中包含所述目标接入点标识;
STA选择出目标 BSS I D后, 将目标 BSS I D携带在关联请求消息中 发送给 AP。 当各个 BSSID共享 Bl, 终端在任意时间使用信道发送上 行消息; 当各个 BSS I D 不共享 B I, 则所述终端在以所述目标接入点 标识为主接入点标识的信标周期使用信道发送上行消息。
步骤 504, 所述 AP接收所述 STA发送的关联请求消息, 所述关 联请求消息中包含的目标接入点标识是所述多个接入点标识中的一 个接入点标识;
当各个 BSSID共享 BI 时, 所述接入点在任何时间使用信道向终 端发送下行消息; 当各个 BSSID不共享 BI 时, 所述接入点在以所述 目标接入点标识为主接入点标识的信标周期使用信道向终端发送下 行消息。
步骤 505, 根据所述目标接入点标识, 为所述终端分配所述目标 接入点标识的独立关联标识空间中的一个关联标识,并向所述终端发 送关联响应消息,所述关联响应消息中包含所述目标接入点标识和所 述关联标识;
STA选择 BSS I D后, 所述 STA与 AP建立关联关系。
AID (association ID, 关联标识) 取值范围为 1-2007。
本发明实施例提供的方案中, 采用多 BSSID机制, 其中, BSSID 起到组号的作用, 一个 BSSID下的 TIM机制、 AID分配与现有技术相 同, 不同的是, 各个 BSSID拥有自己独立的 AID 空间, 这样, 一个 AP使用三个 BSSID就可以支持多达 6021 个 STA, 使用更多的 BSSID 就可以支持更多的 STA。 步骤 506, 所述 STA接收所述接入点发送的关联响应消息, 所述 关联响应消息中包含所述目标接入点标识和关联标识,所述关联标识 是由所述接入点为终端分配的所述目标接入点标识的独立关联标识 空间中的一个标识;
步骤 507, 所述 STA周期性侦听所述目标接入点标识的信标帧, 并解析所述信标帧中的待传输数据指示信息以便获取所述终端的待 传输数据指示信息,所述信标帧中包含所述主接入点标识的待传输数 据指示信息和副接入点标识的待传输数据指示信息,所述副接入点标 识为所述多个接入点标识中除所述主接入点标识之外的接入点标识。
T I M元素的 "局部有效位表" 的最大长度为 251 字节, 其中, 每 一个比特代表一个 STA, 比特的位置就是 STA的 A I D, 当比特值为 1 时, 表示有下行数据, 当比特位为 0时, 表示没有下行数据。 也就是 说,所述信标帧中的待传输数据指示信息以 T I M元素中的比特位置进 行指示。
当在 T I M元素中提示有下行数据时, 在各个 BSS I D共享 B I 的场 景下, 终端可以向 AP在任意时间使用信道与所述接入点通信, 具体 地, 终端可以向 AP在任意时间使用信道索要下行数据; 或者, 在各 个 BSS I D不共享 B I 的场景下, 所述终端在以所述目标接入点标识为 主接入点标识的信标周期使用信道与所述接入点通信, 具体地, 所述 终端在以所述目标接入点标识为主接入点标识的信标周期使用信道 索取下行数据。
同理, 在各个 BSS I D共享 B I 的场景下, 所述 AP在任何时间使用 信道与所述终端通信, 具体地, 所述 AP在任何时间使用信道向关联 的所述 STA发送下行数据; 或者, 在各个 BSS I D不共享 B I 的场景下, 所述 AP在以所述目标接入点标识为主接入点标识的信标周期使用信 道与所述终端通信, 具体地, 所述 AP在以所述目标接入点标识为主 接入点标识的信标周期使用信道发送下行数据。
需要说明的是, 因为 STA侦听 TIM信息有两种情况, 如果信标帧 中只携带主 BSS I D的 T I M信息,则 STA只需要侦听所述 STA关联的目 标 BSSID为主 BSSID时的信标帧; 否则, STA可以只侦听所述 STA关 联的目标 BSSID为主 BSSID时的信标帧, 也可以侦听所有信标帧。
另外, 在各个 BSSID共享 BI 的场景下, 可以将副 BSSID的 TIM 加在 G-BSSID元素中, 以便 STA侦听到任一个信标帧时, 都可以知道 它有没有下行数据。
本发明实施例提供一种分配标识的方法,通过依次以所述多个接 入点标识中的各个接入点标识为主接入点标识广播信标帧, 当接入点 接收终端发送的关联请求消息后,根据关联请求消息中的所述目标接 入点标识, 为所述终端分配所述目标接入点标识的独立关联标识空间 中的一个关联标识,并向所述终端发送关联响应消息。与现有技术中, 在兼容现有标准中的 T I M机制的基础上一个 AP最多只能分配 2007个 STA相比, 本发明实施例提供的方案, 每个 BSSID由自己独立的 AID 空间,从而可以在兼容现有标准中的 T I M机制的基础上分配超过 2007 个 STA。
本发明实施例提供一种接入点, 所述接入点具有多个接入点标 识, 每个所述接入点标识有独立的关联标识空间, 该装置可以为 AP, 如图 6所示, 该接入点包括: 广播单元 601, 接收单元 602, 分配发 送单元 603, 第一执行单元 604, 第二执行单元 605。
广播单元 601, 用于依次以所述多个接入点标识中的各个接入点 标识为主接入点标识广播信标帧,所述信标帧中包含所述主接入点标 识的待传输数据指示信息和副接入点标识的信息,所述副接入点标识 为所述多个接入点标识中除所述主接入点标识之外的接入点标识; 所述副接入点标识的信息包括所述副接入点标识的负载信息和 / 或所述副接入点标识的待传输数据指示信息;
所述副接入点标识的待传输数据指示信息在所述信标帧的载荷 部分以副接入点标识信息元素描述。
当 STA 扫描发现 AP 后, 对信标帧进行解析, 并选择一个目标 BSS I D, 此时, 接收单元 602, 用于接收终端发送的关联请求消息, 所述关联请求消息中包含的目标接入点标识是所述多个接入点标识 中的一个接入点标识;
根据所述目标接入点标识, 分配发送单元 603, 为所述终端分配 所述目标接入点标识的独立关联标识空间中的一个关联标识,并向所 述终端发送关联响应消息,所述关联响应消息中包含所述目标接入点 标识和所述关联标识。
在 STA与 AP建立关联关系后, 在各个 BSS I D共享 B I 的情况下, 第一执行单元 604, 用于在任何时间使用信道与所述终端通信;
或者, 在各个 BSS I D不共享 B I 的情况下, 第二执行单元 605, 用于在以所述目标接入点标识为主接入点标识的信标周期使用信道 与所述终端通信。
本发明实施例提供的一种接入点,通过广播单元依次以所述多个 接入点标识中的各个接入点标识为主接入点标识广播信标帧,接收单 元接收终端发送的关联请求消息, 根据所述目标接入点标识, 分配发 送单元为所述终端分配所述目标接入点标识的独立关联标识空间中 的一个关联标识, 并向所述终端发送关联响应消息。 与现有技术中, 在兼容现有标准中的 T I M机制的基础上一个 AP最多只能分配 2007个 STA相比, 本发明实施例提供的方案, 每个 BSS I D由自己独立的 A I D 空间,从而可以在兼容现有标准中的 T I M机制的基础上分配超过 2007 个 STA。
本发明实施例提供一种终端, 该装置可以为 STA, 如图 7所示, 该终端包括:解析单元 701,解析选择模块 701 1,第一选择模块 701 2, 第二选择模块 701 3, 发送单元 702, 接收单元 703, 侦听单元 704, 第一执行单元 705, 第二执行单元 706。
解析单元 701, 用于解析接收到的由所述接入点发送的信标帧选 择一个目标接入点标识, 所述接入点具有多个接入点标识, 每个所述 接入点标识有独立的关联标识空间;
具体地, 所述解析单元 701 中的解析选择模块 701 1, 用于解析 接收到的由所述接入点发送的信标帧中的主接入点标识相关信息和 副接入点标识相关信息, 选择一个接入点标识作为目标接入点标识, 所述相关信息包括能力信息和 /或负载信息;
和 /或, 所述解析单元 701 中的第一选择模块 701 2, 用于选择所 述主接入点标识为目标接入点标识;
和 /或, 所述解析单元 701 中的第二选择模块 701 3, 用于根据所 述接入点发送的信标帧中携带的指示选择目标接入点标识。
在选择目标接入点标识后, 发送单元 702, 用于向所述接入点发 送关联请求消息, 所述关联请求消息中包含所述目标接入点标识; 接入点接收到终端发送的关联请求消息后,根据目标接入点标识 为终端分配一个关联标识, 并发送给终端, 此时, 接收单元 703, 用 于接收所述接入点发送的关联响应消息,所述关联响应消息中包含所 述目标接入点标识和为所述终端分配的所述关联标识。
侦听单元 704, 用于周期性侦听所述目标接入点标识的信标帧, 并解析所述信标帧中的待传输数据指示信息以便获取所述终端的待 传输数据指示信息,所述信标帧中包含所述主接入点标识的待传输数 据指示信息和副接入点标识的待传输数据指示信息,所述副接入点标 识为所述多个接入点标识中除所述主接入点标识之外的接入点标识。
所述副接入点标识的信息包括所述副接入点标识的待传输数据 指示信息;所述副接入点标识的待传输数据指示信息在所述信标帧的 载荷部分以副接入点标识信息元素描述。
当 STA与 AP关联后, 在各个 BSS I D共享 B I 的场景下, 第一执行 单元 705, 在任意时间使用信道与所述接入点通信; 或者,
在各个 BSS I D不共享 B I 的场景下, 第二执行单元 706, 在以所 述目标接入点标识为主接入点标识的信标周期使用信道与所述接入 点通信。
本发明实施例提供的一种终端, 通过解析单元扫描到接入点后, 解析接收的由所述接入点发送的信标帧并选择一个目标接入点标识, 发送单元向所述接入点发送关联请求消息,所述关联请求消息中包含 所述目标接入点标识, 接收单元接收所述接入点发送的关联响应消 息, 关联响应消息中包含所述目标接入点标识和关联标识。 与现有技 术中, 在兼容现有标准中的 T I M机制的基础上一个 AP最多只能分配 2007个 STA相比, 本发明实施例提供的方案, 每个 BSS I D 由自己独 立的 A I D空间,从而可以在兼容现有标准中的 T I M机制的基础上分配 超过 2007个 STAo
以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围并 不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范 围内, 可轻易想到变化或替换, 都应涵盖在本发明的保护范围之内。 因此, 本发明的保护范围应所述以权利要求的保护范围为准。

Claims

权 利 要 求
1、 一种分配标识的方法, 其特征在于, 接入点具有多个接入点 标识, 每个所述接入点标识有独立的关联标识空间, 所述方法包括: 依次以所述多个接入点标识中的各个接入点标识为主接入点标 识广播信标帧,所述信标帧中包含所述主接入点标识的待传输数据指 示信息和副接入点标识的信息,所述副接入点标识为所述多个接入点 标识中除所述主接入点标识之外的接入点标识;
接收终端发送的关联请求消息,所述关联请求消息中包含的目标 接入点标识是所述多个接入点标识中的一个接入点标识;
根据所述目标接入点标识, 为所述终端分配所述目标接入点标识 的独立关联标识空间中的一个关联标识,并向所述终端发送关联响应 消息, 所述关联响应消息中包含所述目标接入点标识和所述关联标 识。
2、 根据权利要求 1 所述的方法, 其特征在于,
所述副接入点标识的信息包括所述副接入点标识的负载信息和 / 或所述副接入点标识的待传输数据指示信息;
所述副接入点标识的待传输数据指示信息包含在所述信标帧中 的副接入点标识信息元素中。
3、 根据权利要求 1 或 2所述的方法, 其特征在于, 所述接入点 在任何时间使用信道与所述终端通信; 或者,
所述接入点在以所述目标接入点标识为主接入点标识的信标周 期使用信道与所述终端通信。
4、 一种分配标识的方法, 其特征在于, 包括:
解析接收到的由接入点发送的信标帧选择一个目标接入点标识, 所述接入点具有多个接入点标识,每个所述接入点标识有独立的关联 标识空间;
向所述接入点发送关联请求消息,所述关联请求消息中包含所述 目标接入点标识;
接收所述接入点发送的关联响应消息,所述关联响应消息中包含 所述目标接入点标识和关联标识,所述关联标识是由所述接入点为终 端分配的所述目标接入点标识的独立关联标识空间中的一个标识。
5、 根据权利要求 4所述的方法, 其特征在于, 在接收所述接入 点发送的关联响应消息后, 还包括:
周期性侦听所述目标接入点标识的信标帧,并解析侦听到的所述 目标接入点标识的信标帧中的待传输数据指示信息以获取所述终端 的待传输数据指示信息,所述侦听到的所述目标接入点标识的信标帧 中包含主接入点标识的待传输数据指示信息和副接入点标识的待传 输数据指示信息,所述副接入点标识为多个接入点标识中除所述主接 入点标识之外的接入点标识。
6、 根据权利要求 4或 5所述的方法, 其特征在于, 所述解析接 收到的由所述接入点发送的信标帧选择一个目标接入点标识包括: 解析接收到的由所述接入点发送的信标帧中的主接入点标识相 关信息和副接入点标识相关信息,选择一个接入点标识作为目标接入 点标识, 所述相关信息包括能力信息和 /或负载信息; 或者,
选择所述主接入点标识为目标接入点标识; 或者
根据所述接入点发送的信标帧中携带的指示,选择目标接入点标 识。
7、 根据权利要求 4至 6任一所述的方法, 其特征在于,
所述终端在任意时间使用信道与所述接入点通信; 或者, 所述终端在以所述目标接入点标识为主接入点标识的信标周期 使用信道与所述接入点通信。
8、 一种接入点, 其特征在于, 所述接入点具有多个接入点标识, 每个所述接入点标识有独立的关联标识空间, 所述接入点包括: 广播单元, 用于依次以所述多个接入点标识中的各个接入点标识 为主接入点标识广播信标帧,所述信标帧中包含所述主接入点标识的 待传输数据指示信息和副接入点标识的信息,所述副接入点标识为所 述多个接入点标识中除所述主接入点标识之外的接入点标识;
接收单元, 用于接收终端发送的关联请求消息, 所述关联请求消 息中包含的目标接入点标识是所述多个接入点标识中的一个接入点 标识;
分配发送单元, 用于根据所述目标接入点标识, 为所述终端分配 所述目标接入点标识的独立关联标识空间中的一个关联标识,并向所 述终端发送关联响应消息,所述关联响应消息中包含所述目标接入点 标识和所述关联标识。
9、 根据权利要求 8所述的接入点, 其特征在于, 所述副接入点 标识的信息包括所述副接入点标识的负载信息和 /或所述副接入点标 识的待传输数据指示信息;
所述副接入点标识的待传输数据指示信息包含在所述信标帧中 的副接入点标识信息元素中。
1 0、 根据权利要求 8或 9所述的接入点, 其特征在于, 所述接入 点还包括:
第一执行单元,用于在任何时间使用信道与所述终端通信;或者, 第二执行单元, 用于在以所述目标接入点标识为主接入点标识的 信标周期使用信道与所述终端通信。
1 1、 一种终端, 其特征在于, 包括:
解析单元, 用于解析接收到的由所述接入点发送的信标帧选择一 个目标接入点标识, 所述接入点具有多个接入点标识, 每个所述接入 点标识有独立的关联标识空间;
发送单元, 用于向所述接入点发送关联请求消息, 所述关联请求 消息中包含所述目标接入点标识;
接收单元, 用于接收所述接入点发送的关联响应消息, 所述关联 响应消息中包含所述目标接入点标识和关联标识,所述关联标识是由 所述接入点为终端分配的所述目标接入点标识的独立关联标识空间 中的一个标识。
1 2、 根据权利要求 1 1 所述的终端, 其特征在于, 所述终端还包 括:
侦听单元, 用于周期性侦听所述目标接入点标识的信标帧, 并解 析所述目标接入点标识的所述信标帧中的待传输数据指示信息以便 获取所述终端的待传输数据指示信息,所述信标帧中包含所述主接入 点标识的待传输数据指示信息和副接入点标识的待传输数据指示信 息,所述副接入点标识为多个接入点标识中除所述主接入点标识之外 的接入点标识。
1 3、 根据权利要求 1 1 或 1 2所述的终端, 其特征在于, 所述解析 单元包括以下至少一种:
解析选择模块, 用于解析接收到的由所述接入点发送的信标帧中 的主接入点标识相关信息和副接入点标识相关信息,选择一个接入点 标识作为目标接入点标识, 所述相关信息包括能力信息和 /或负载信 息;
第一选择模块, 用于选择所述主接入点标识为目标接入点标识; 第二选择模块, 用于根据所述接入点发送的信标帧中携带的指 示, 选择目标接入点标识。
14、 根据权利要求 1 1 至 1 3任一所述的终端, 其特征在于, 所 述终端还包括:
第一执行单元, 用于在任意时间使用信道与所述接入点通信; 或 者, 第二执行单元, 用于在以所述目标接入点标识为主接入点标识的 信标周期使用信道与所述接入点通信。
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