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WO2016131182A1 - Procédé d'accès aléatoire, site et point d'accès - Google Patents

Procédé d'accès aléatoire, site et point d'accès Download PDF

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Publication number
WO2016131182A1
WO2016131182A1 PCT/CN2015/073206 CN2015073206W WO2016131182A1 WO 2016131182 A1 WO2016131182 A1 WO 2016131182A1 CN 2015073206 W CN2015073206 W CN 2015073206W WO 2016131182 A1 WO2016131182 A1 WO 2016131182A1
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WO
WIPO (PCT)
Prior art keywords
station
resource
allocation information
sent
resource allocation
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2015/073206
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English (en)
Chinese (zh)
Inventor
林英沛
罗俊
马驰翔
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Huawei Technologies Co Ltd
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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
Priority to PCT/CN2015/073206 priority Critical patent/WO2016131182A1/fr
Priority to CN201580071343.XA priority patent/CN107113806B/zh
Publication of WO2016131182A1 publication Critical patent/WO2016131182A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a random access method, a station, and an access point.
  • Wireless Local Area Networks (English: Wireless Local Area Networks, WLAN for short) is a network system that uses radio frequency technology to transmit in the air. With the continuous increase in the number of communication devices, the spectrum used for signal transmission over the air interface has become more and more crowded. Improving the efficiency of air interface transmission has become one of the key issues facing wireless communication.
  • D2D Device to Device
  • WiFi Wireless Fidelity
  • AP Access Point
  • the D2D discovery technology is one of the key points in the D2D technology.
  • D2D discovery is performed between user equipments, the D2D link is not established yet. Therefore, the D2D link needs to be established by the AP through the traditional link.
  • a contention-based uplink random access method in Orthogonal Frequency Division Multiple Access (OFDMA) is implemented to implement D2D discovery.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • the OFDMA frame structure includes a legacy preamble (English: Legacy Preamble), an 11ax signaling field (English: 11ax Signal Field), a downlink transmission subframe (English: Downlink subframe), and an uplink transmission subframe (English: Uplink subframe), wherein the 11ax signaling field includes a frame control area (English: Frame Control) and a signaling field (English: Signal Field, referred to as SIG), and the signaling field is used to refer to
  • the downlink and uplink resource allocation information may be indicated by a Media Access Protocol (English: Media Acess Protocol, MAP for short).
  • the resource location for uplink random access in the next uplink interval is given in the random access configuration information field of the frame control region in the OFDMA frame structure.
  • a station having an uplink demand in the time-frequency resource (English: Station, abbreviated as STA) arbitrarily selects a random access sequence in the random access sequence set to send an uplink access request, and is used to declare that the uplink information is needed to the AP.
  • the STA transmits the specific resource request information in the indicated uplink resource for the AP to use in the scheduling of the next uplink time slot. After receiving the resource request information, the AP schedules the STA according to the scheduling rule, and the scheduling information is below.
  • the MAP in an OFDMA frame indicates that after receiving the scheduling information, the STA performs uplink transmission at the location indicated by the AP.
  • the signaling overhead for transmitting discovery information is too large and the delay is long due to excessive interaction between the site and the AP.
  • the embodiments of the present invention provide a random access method, a site, and an access point, which are used to reduce the interaction process of the random access process, reduce signaling transmission overhead, and reduce delay.
  • an embodiment of the present invention provides a random access method, including:
  • the station acquires a random access resource allocated by the access point
  • Receiving resource allocation information sent by the access point, where the resource allocation information includes a transmission resource identifier allocated by the access point to the station, where the transmission resource identifier is related to a type field in the random access request. correspond;
  • the data packet with a fixed data packet length includes: a terminal-to-terminal D2D discovery request frame, a D2D discovery response frame, a D2D link setup request frame, and a D2D link setup response. frame;
  • the data packet whose data packet length is not fixed includes: a D2D resource request frame and a D2D data frame.
  • a second possible implementation manner of the first aspect is further provided, if the site is a first D2D site, the resource allocation The sending the to-be-sent data on the transmission resource of the information specifically includes: the first D2D station transmitting a D2D discovery request frame on the transmission resource of the resource allocation information.
  • a third possible implementation manner of the first aspect is further provided, where the first D2D station sends a D2D discovery request frame on the transmission resource of the resource allocation information. Thereafter, the method further includes:
  • the first D2D site listens to the first resource allocation information sent by the access point, where the first resource allocation information includes a transmission resource identifier allocated by the access point to a second D2D station, and the transmission resource Transmitting, by the second D2D station, a D2D discovery response frame;
  • a fourth possible implementation manner of the first aspect is further provided, if the site is a first D2D site, the resource allocation The sending the to-be-sent data on the transmission resource of the information specifically includes: the first D2D station transmitting a D2D link establishment request frame on the transmission resource of the resource allocation information.
  • a fifth possible implementation manner of the first aspect is further provided, where the first D2D station sends a D2D link establishment on a transmission resource of the resource allocation information. After requesting the frame, the method further includes:
  • the first D2D site listens to the third resource allocation information sent by the access point, where the third resource allocation information includes the access point being allocated by the second D2D station. Transmitting a resource identifier, where the transmission resource is used by the second D2D station to transmit a D2D link setup response frame;
  • the sixth possible implementation manner of the first aspect is further provided, if the site is a second D2D site, the acquiring an access point is allocated Before the random access resource, the method further includes:
  • the second D2D site listens to the second resource allocation information sent by the access point, where the second resource allocation information includes a transmission resource identifier allocated by the access point to the first D2D station, and the transmission resource Transmitting, by the first D2D station, a D2D discovery request frame;
  • the seventh possible implementation manner of the first aspect is further provided, where the sending the data to be sent on the transmission resource of the resource allocation information specifically includes: The second D2D station transmits a D2D discovery response frame on the transmission resource of the resource allocation information.
  • the eighth possible implementation manner of the first aspect is further provided, if the site is a second D2D site, the obtaining access point allocation Before the random access resource, the method further includes:
  • the second D2D site listens to the access point and sends the fourth resource allocation information, where the fourth resource allocation information includes a transmission resource identifier allocated by the access point to the first D2D station, and the transmission resource Transmitting, by the first D2D station, a D2D link setup request frame;
  • the ninth possible implementation manner of the first aspect is further provided, where the sending the data to be sent on the transmission resource of the resource allocation information specifically includes: The second D2D site is in the resource allocation letter A D2D link setup response frame is sent on the transmission resource of the interest.
  • an embodiment of the present invention provides a random access method, including:
  • the station acquires a random access resource allocated by the access point, where the random access resource includes a random access resource with random data packet length and a data packet with a fixed data packet length for random access. Random access resources;
  • the type of the data packet to be sent includes a data packet with a fixed data packet length and a data packet whose data packet length is not fixed;
  • the resource allocation information includes a transmission resource identifier allocated by the access point to the station, where the transmission resource identifier corresponds to the selected random access resource;
  • the data packet with fixed data packet length includes: a terminal-to-terminal D2D discovery request frame, a D2D discovery response frame, a D2D link setup request frame, and a D2D link setup response frame. ;
  • the data packet whose data packet length is not fixed includes: a D2D resource request frame and a D2D data frame.
  • the second possible implementation manner of the second aspect is further provided, if the site is a first D2D site, the resource allocation The sending the to-be-sent data on the transmission resource of the information specifically includes: the first D2D station transmitting a D2D discovery request frame on the transmission resource of the resource allocation information.
  • a third possible implementation manner of the second aspect is further provided, where the first D2D station sends a D2D discovery request frame on the transmission resource of the resource allocation information. Thereafter, the method further includes:
  • the first D2D site listens to the first resource allocation information sent by the access point, where the first resource allocation information includes a transmission resource identifier allocated by the access point to a second D2D station, and the transmission resource Transmitting, by the second D2D station, a D2D discovery response frame;
  • a fourth possible implementation manner of the second aspect is further provided, if the site is a first D2D site, the resource allocation
  • the sending the to-be-sent data on the transmission resource of the information specifically includes: the first D2D station transmitting a D2D link establishment request frame on the transmission resource of the resource allocation information.
  • a fifth possible implementation manner of the second aspect is further provided, where the first D2D station sends the D2D link establishment on the transmission resource of the resource allocation information. After requesting the frame, the method further includes:
  • the first D2D site listens to the third resource allocation information that is sent by the access point, where the third resource allocation information includes a transmission resource identifier that is allocated by the access point to the second D2D station, and the transmission resource Transmitting, by the second D2D station, a D2D link setup response frame;
  • the sixth possible implementation manner of the second aspect is further provided, if the site is a second D2D site, the obtaining access point allocation Before the random access resource, the method further includes:
  • the second D2D station listens to the access point and sends the second resource allocation information, where the second resource allocation information includes a transmission resource identifier allocated by the access point to the first D2D station, and the transmission resource Transmitting, by the first D2D station, a D2D discovery request frame;
  • the sending the data to be sent on the transmission resource of the resource allocation information specifically includes: The second D2D station transmits a D2D discovery response frame on the transmission resource of the resource allocation information.
  • the eighth possible implementation manner of the second aspect is further provided, if the site is a second D2D site, the obtaining access point allocation Before the random access resource, the method further includes:
  • the second D2D site listens to the access point and sends the fourth resource allocation information, where the fourth resource allocation information includes a transmission resource identifier allocated by the access point to the first D2D station, and the transmission resource Transmitting, by the first D2D station, a D2D link setup request frame;
  • the ninth possible implementation manner of the second aspect is further provided, where the sending the data to be sent on the transmission resource of the resource allocation information specifically includes: The second D2D station transmits a D2D link setup response frame on the transmission resource of the resource allocation information.
  • an embodiment of the present invention provides a method for random access, including:
  • the access point allocates random access resources to the site
  • the random access request includes a type field of data to be sent by the station, and the type of the data to be sent includes data with a fixed data packet length Packets and packets whose data length is not fixed;
  • the resource allocation information includes a transmission resource identifier allocated by the access point to the station, where the transmission resource identifier corresponds to a type field in the random access request;
  • Receiving data to be transmitted sent by the station on a transmission resource of the resource allocation information Receiving data to be transmitted sent by the station on a transmission resource of the resource allocation information.
  • the data packet with a fixed data packet length includes: a terminal-to-terminal D2D discovery request frame, a D2D discovery response frame, a D2D link setup request frame, and a D2D link setup response. frame;
  • the data packet whose data packet length is not fixed includes: a D2D resource request frame and a D2D data frame.
  • an embodiment of the present invention provides a random access method, including:
  • the access point allocates a random access resource to the station, and the random access resource includes a random access resource with a random data packet length and a random access resource with a data packet length that is randomly fixed.
  • Access resources ;
  • the type of the to-be-sent data packet includes a data packet with a fixed data packet length and a data packet length that is not fixed. data pack;
  • the resource allocation information includes a transmission resource identifier allocated by the access point to the station, where the transmission resource identifier corresponds to a random access resource selected by the station;
  • Receiving data to be transmitted sent by the station on a transmission resource of the resource allocation information Receiving data to be transmitted sent by the station on a transmission resource of the resource allocation information.
  • the data packet with a fixed data packet length includes: a terminal-to-terminal D2D discovery request frame, a D2D discovery response frame, a D2D link setup request frame, and a D2D link setup response. frame;
  • the data packet whose data packet length is not fixed includes: a D2D resource request frame and a D2D data frame.
  • an embodiment of the present invention provides a site, including:
  • An obtaining unit configured to acquire a random access resource allocated by the access point
  • a sending unit configured to send a random access request to the access point on the random access resource, where the random access request includes a type field of data to be sent by the station, where the type of the data to be sent includes A packet with a fixed packet length and a packet with a fixed packet length;
  • a receiving unit configured to receive resource allocation information sent by the access point, where the resource allocation information includes a transmission resource identifier allocated by the access point to the station, the transmission resource identifier and the random access request Corresponding to the type field in ;
  • the sending unit is further configured to send the to-be-sent data on a transmission resource of the resource allocation information.
  • the data packet length is fixed
  • the data packet includes: a terminal-to-terminal D2D discovery request frame, a D2D discovery response frame, a D2D link establishment request frame, and a D2D link establishment response frame;
  • the data packet whose data packet length is not fixed includes: a D2D resource request frame and a D2D data frame.
  • the sending unit is in the The sending the to-be-sent data on the transmission resource of the resource allocation information specifically includes: the sending unit sending a D2D discovery request frame on the transmission resource of the resource allocation information.
  • a third possible implementation manner of the fifth aspect is further provided, where the site further includes: a first listening unit;
  • the first listening unit is configured to: after the sending unit sends a D2D discovery request frame on the transmission resource of the resource allocation information, listen to the first resource allocation information sent by the access point, where the a resource allocation information includes a transmission resource identifier allocated by the access point to a second D2D station, where the transmission resource is used by the second D2D station to transmit a D2D discovery response frame;
  • the first intercepting unit is further configured to listen to the D2D discovery response frame sent by the second D2D station on the transmission resource of the first resource allocation information.
  • the sending unit is in the The sending the to-be-sent data on the transmission resource of the resource allocation information specifically includes: the sending unit sends a D2D link establishment request frame on the transmission resource of the resource allocation information.
  • a fifth possible implementation manner of the fifth aspect is further provided, where the site further includes: a second intercepting unit;
  • the second intercepting unit is configured to: after the sending unit sends a D2D link establishment request frame on the transmission resource of the resource allocation information, listen to the third resource allocation information sent by the access point, where The third resource allocation information includes a transmission resource identifier allocated by the access point to a second D2D station, and the transmission resource is used for the second
  • the D2D station transmits a D2D link setup response frame;
  • the second intercepting unit is further configured to listen to the D2D link setup response frame sent by the second D2D station on the transmission resource of the third resource allocation information.
  • the first possible implementation manner of the fifth aspect is further provided, if the site is a second D2D site, the site further includes: Three listening units;
  • the third intercepting unit is configured to listen to the second resource allocation information sent by the access point, where the acquiring unit acquires the random access resource allocated by the access point, where the second resource allocation information is And including, by the access point, a transmission resource identifier allocated by the first D2D station, where the transmission resource is used by the first D2D station to transmit a D2D discovery request frame;
  • the third intercepting unit is further configured to listen to the D2D discovery request frame sent by the first D2D station on the transmission resource of the second resource allocation information.
  • the sending unit sends the to-be-sent data on the transmission resource of the resource allocation information
  • the method includes: the sending unit sends a D2D discovery response frame on a transmission resource of the resource allocation information.
  • the first possible implementation manner of the fifth aspect is further provided, if the site is a second D2D site, the site further includes: Four listening units;
  • the fourth intercepting unit is configured to: after the obtaining unit acquires the random access resource allocated by the access point, listen to the access point to send the fourth resource allocation information, where the fourth resource allocation information is And including, by the access point, a transmission resource identifier allocated by the first D2D station, where the transmission resource is used by the first D2D station to transmit a D2D link establishment request frame;
  • the fourth intercepting unit is further configured to listen to the D2D link establishment request frame sent by the first D2D station on the transmission resource of the fourth resource allocation information.
  • a ninth possible implementation manner of the fifth aspect is further provided, where the sending unit transmits the resource allocation information
  • the sending the to-be-sent data on the resource specifically includes: the sending unit sending a D2D link setup response frame on the transmission resource of the resource allocation information.
  • an embodiment of the present invention provides a site, including:
  • an obtaining unit configured to acquire a random access resource allocated by the access point, where the random access resource includes a data packet with a fixed data packet length, a random access resource randomly selected, and a data packet whose data packet length is not fixed. Random access random access resources;
  • a sending unit configured to send a random access request on the corresponding random access resource according to the type of the data packet to be sent, where the type of the data packet to be sent includes a data packet with a fixed data packet length and a data packet length is not fixed Data packet
  • a receiving unit configured to receive resource allocation information sent by the access point, where the resource allocation information includes a transmission resource identifier allocated by the access point to the station, where the transmission resource identifier is selected and randomly selected Corresponding to resources;
  • the sending unit is further configured to send the to-be-sent data on a transmission resource of the resource allocation information.
  • the data packet with a fixed data packet length includes: a terminal-to-terminal D2D discovery request frame, a D2D discovery response frame, a D2D link setup request frame, and a D2D link setup response. frame;
  • the data packet whose data packet length is not fixed includes: a D2D resource request frame and a D2D data frame.
  • the sending unit is The sending the to-be-sent data on the transmission resource of the resource allocation information specifically includes: the sending unit sending a D2D discovery request frame on the transmission resource of the resource allocation information.
  • a third possible implementation manner of the sixth aspect is further provided, where the site further includes: a first listening unit;
  • the first listening unit is configured to: after the sending unit sends a D2D discovery request frame on the transmission resource of the resource allocation information, listen to the first resource allocation information sent by the access point, where the The resource allocation information includes the access point as the second a transmission resource identifier allocated by the D2D station, where the transmission resource is used by the second D2D station to transmit a D2D discovery response frame;
  • the first intercepting unit is further configured to listen to the D2D discovery response frame sent by the second D2D station on the transmission resource of the first resource allocation information.
  • a fourth possible implementation manner of the sixth aspect is further provided, if the site is a first D2D site, the sending unit is The sending the to-be-sent data on the transmission resource of the resource allocation information specifically includes: the sending unit sends a D2D link establishment request frame on the transmission resource of the resource allocation information.
  • the site further includes: a second intercepting unit;
  • the second intercepting unit is configured to: after the sending unit sends a D2D link establishment request frame on the transmission resource of the resource allocation information, listen to the third resource allocation information sent by the access point, where The third resource allocation information includes a transmission resource identifier allocated by the access point to a second D2D station, where the transmission resource is used by the second D2D station to transmit a D2D link establishment response frame;
  • the second intercepting unit is further configured to listen to the D2D link setup response frame sent by the second D2D station on the transmission resource of the third resource allocation information.
  • the first possible implementation manner of the sixth aspect is further provided, if the site is a second D2D site, the site further includes: Three listening units;
  • the third intercepting unit is configured to: after the obtaining unit acquires the random access resource allocated by the access point, listen to the access point to send the second resource allocation information, where the second resource allocation information is And including, by the access point, a transmission resource identifier allocated by the first D2D station, where the transmission resource is used by the first D2D station to transmit a D2D discovery request frame;
  • the third intercepting unit is further configured to listen to the D2D discovery request frame sent by the first D2D station on the transmission resource of the second resource allocation information.
  • the sending, by the sending unit, the data to be sent, on the transmission resource of the resource allocation information specifically includes: sending, by the sending unit, a D2D discovery response frame on a transmission resource of the resource allocation information .
  • the first possible implementation manner of the sixth aspect is further provided, if the site is a second D2D site, the site further includes: Four listening units;
  • the fourth intercepting unit is configured to: after the obtaining unit acquires the random access resource allocated by the access point, listen to the access point to send the fourth resource allocation information, where the fourth resource allocation information is And including, by the access point, a transmission resource identifier allocated by the first D2D station, where the transmission resource is used by the first D2D station to transmit a D2D link establishment request frame;
  • the fourth intercepting unit is further configured to listen to the D2D link establishment request frame sent by the first D2D station on the transmission resource of the fourth resource allocation information.
  • the sending unit sends the to-be-sent data on the transmission resource of the resource allocation information
  • the method includes: the sending unit sends a D2D link setup response frame on a transmission resource of the resource allocation information.
  • an embodiment of the present invention provides an access point, including:
  • An allocating unit configured to allocate random access resources to the site by the access point
  • a receiving unit configured to receive a random access request sent by the station on the random access resource, where the random access request includes a type field of data to be sent by the station, where the type of the data to be sent includes data A packet with a fixed packet length and a packet with a fixed packet length;
  • a sending unit configured to send resource allocation information to the station, where the resource allocation information includes a transmission resource identifier allocated by the access point to the station, and the type of the transmission resource identifier and the random access request Field corresponding;
  • the receiving unit is further configured to receive data to be sent sent by the station on a transmission resource of the resource allocation information.
  • the data packet length is fixed
  • the data packet includes: a terminal-to-terminal D2D discovery request frame, a D2D discovery response frame, a D2D link establishment request frame, and a D2D link establishment response frame;
  • the data packet whose data packet length is not fixed includes: a D2D resource request frame and a D2D data frame.
  • an access point including:
  • An allocating unit configured to allocate a random access resource to the station, where the random access resource includes a random access resource with a random data packet and a data packet with a fixed data packet length for random access Random access resources;
  • a receiving unit configured to receive, according to the type of the data packet to be sent, a random access request sent on the corresponding random access resource, where the type of the to-be-sent data packet includes a data packet with a fixed data packet length and data a packet whose packet length is not fixed;
  • a sending unit configured to send resource allocation information to the station, where the resource allocation information includes a transmission resource identifier allocated by the access point to the station, and the transmission resource identifier and the random access selected by the station Corresponding to resources;
  • the receiving unit is further configured to receive data to be sent sent by the station on a transmission resource of the resource allocation information.
  • the data packet with a fixed data packet length includes: a terminal-to-terminal D2D discovery request frame, a D2D discovery response frame, a D2D link setup request frame, and a D2D link setup response. frame;
  • the data packet whose data packet length is not fixed includes: a D2D resource request frame and a D2D data frame.
  • the embodiment of the present invention provides a random access method, a station, and an access point.
  • the station acquires a random access resource allocated by the access point, and sends a random access request to the random access resource.
  • the access point, the random access request includes a type field of the data to be sent by the station, and the type of the data to be sent includes a data packet with a fixed data packet length and a data packet whose data packet length is not fixed, so that the access point is in accordance with the random access request.
  • the type identifier of the carried data knowing how much transmission resource the station needs, and then allocating the transmission resource dedicated to the data to the station, that is, the station receives the resource allocation information sent by the access point, and the resource allocation information includes the access point.
  • the transmission resource identifier corresponds to the type field in the random access request. Further, the station sends the to-be-sent data on the transmission resource of the resource allocation information. Compared with the prior art, in the embodiment of the present invention, the station carries the type field of the data to be sent in the random access request, so that the access point allocates the corresponding transmission resource according to the type field of the data to be sent, so that the station is allocated. The data to be sent is sent on the transmission resource, which reduces the interaction process of the random access process, thereby reducing the signaling transmission overhead and reducing the delay.
  • FIG. 1 is a schematic diagram of a frame structure in the prior art
  • FIG. 2 is a schematic diagram of an application scenario according to an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram of a random access method according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic diagram of a frame structure of a data packet with a fixed data packet length according to an embodiment of the present invention
  • FIG. 5 is a first schematic diagram of a method for performing random access when a station is a first D2D station according to Embodiment 1 of the present invention
  • FIG. 6 is a second schematic diagram of a method for performing random access when a station is a first D2D station according to Embodiment 1 of the present invention
  • FIG. 7 is a first schematic diagram of a method for performing random access when a station is a second D2D station according to Embodiment 1 of the present invention.
  • FIG. 8 is a second schematic diagram of a method for performing random access when a station is a second D2D station according to Embodiment 1 of the present invention.
  • FIG. 9 is a schematic diagram of a method for random access according to Embodiment 2 of the present invention.
  • FIG. 10 is a random connection when the site is the first D2D site according to the second embodiment of the present invention. Schematic diagram of the method of entering;
  • FIG. 11 is a second schematic diagram of a method for performing random access when a station is a first D2D station according to Embodiment 2 of the present invention.
  • FIG. 12 is a first schematic diagram of a method for performing random access when a station is a second D2D station according to Embodiment 2 of the present invention.
  • FIG. 13 is a second schematic diagram of a method for performing random access when a station is a second D2D station according to Embodiment 2 of the present invention.
  • FIG. 14 is a schematic diagram of a random access method according to Embodiment 3 of the present invention.
  • FIG. 15 is a schematic diagram of a random access method according to Embodiment 4 of the present invention.
  • FIG. 16 is a schematic diagram of a random access method according to Embodiment 5 of the present invention.
  • FIG. 17(a) is a schematic diagram of STA1 performing random access according to Embodiment 5 of the present invention.
  • 17(b) is a schematic diagram of STA2 performing random access according to Embodiment 5 of the present invention.
  • FIG. 18 is a schematic diagram of a random access method according to Embodiment 6 of the present invention.
  • FIG. 19 is a schematic diagram of a random access resource allocated by an access point according to Embodiment 6 of the present invention.
  • FIG. 20 is a schematic diagram of a station according to Embodiment 7 of the present invention.
  • FIG. 21 is a schematic diagram of a site being a first D2D site according to Embodiment 7 of the present invention.
  • 22 is a schematic diagram of seven sites being a second D2D site according to an embodiment of the present invention.
  • FIG. 23 is a schematic diagram of a station according to Embodiment 8 of the present invention.
  • FIG. 24 is a schematic diagram of a station being a first D2D station according to Embodiment 8 of the present invention.
  • FIG. 25 is a schematic diagram of a second D2D station in a station in Embodiment 8 of the present invention.
  • FIG. 26 is a schematic diagram of an access point according to Embodiment 9 of the present invention.
  • FIG. 27 is a schematic diagram of an access point according to Embodiment 10 of the present invention.
  • FIG. 2 Before the content described in the embodiment of the present invention is introduced, the application scenario of the embodiment of the present invention is first introduced, as shown in FIG. 2, specifically:
  • the embodiment of the present invention can be applied to a wireless local area network, where a plurality of basic service sets (abbreviation: BSS, English: Basic Service Set) can be included in the wireless local area network, and the network node in the basic service set is a station (English: Station, abbreviated as STA).
  • the site includes an access point class (abbreviation: AP, English: Access Point) and a non-access point class (English: None Access Point Station, referred to as Non-AP STA).
  • Each basic service set may contain one AP and multiple Non-AP STAs associated with the AP.
  • Access point class sites (abbreviation: AP, English: Access Point), also known as wireless access points or hotspots.
  • the AP is an access point for mobile users to enter the wired network. It is mainly deployed in the home, inside the building, and inside the campus. The typical coverage radius is tens of meters to hundreds of meters. Of course, it can also be deployed outdoors.
  • An AP is equivalent to a bridge connecting a wired network and a wireless network. Its main function is to connect the wireless network clients together and then connect the wireless network to the Ethernet.
  • the standard adopted by AP is IEEE (English: Institute of Electrical and Electronics Engineers) 802.11 series.
  • the AP may be a terminal device or a network device with a WiFi chip.
  • the AP may be a device that supports the 802.11ax system. Further, the AP may be configured to support multiple WLANs such as 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a (English: Wireless Local Area Network, Chinese: Wireless LAN) Standard equipment.
  • a non-access point class (English: None Access Point Station, referred to as Non-AP STA), which can be a wireless communication chip, a wireless sensor, or a wireless communication terminal.
  • a mobile phone that supports wireless fidelity (English: Wireless Fidelity, referred to as WiFi) communication function
  • a tablet computer that supports WiFi communication function
  • a set-top box that supports WiFi communication function
  • a smart TV that supports WiFi communication function
  • a WiFi communication function Smart wearables and computers that support WiFi communication.
  • the site can support the 802.11ax standard, and further optionally, the site supports 802.11ac, 802.11n, Various WLAN systems such as 802.11g, 802.11b, and 802.11a.
  • FIG. 2 is a schematic diagram of a typical WLAN deployment scenario, including an AP and 4 STAs, where STA1-STA2 has D2D transmission capability and participates in D2D transmission.
  • STA1-STA2 has D2D transmission capability and participates in D2D transmission.
  • the embodiments of the present invention are specifically described with reference to the application scenario shown in FIG. 2 .
  • An embodiment of the present invention provides a random access method, as shown in FIG. 3, including:
  • Step 101 The station acquires a random access resource allocated by the access point.
  • the random access resource is a resource required to send a random access request to the access point when the site has new data to be sent but no uplink resource is allocated.
  • Step 102 Send a random access request to the access point on the random access resource, where the random access request includes a type field of the data to be sent by the station, and the type of the data to be sent includes a data packet with a fixed data packet length and a data packet length. Fixed data packet.
  • the data packet with fixed data packet length includes: a D2D discovery request frame, a D2D discovery response frame, a D2D link establishment request frame, and a D2D link establishment response frame; the data packet whose data packet length is not fixed includes: a D2D resource request frame, D2D data frame.
  • the frame structure of the data packet with fixed data packet length refers to FIG. 4, Category (type) is used to indicate the frame type, and TA (English: Transmission Address, Chinese: sending address) is used to indicate the address information of the sender, RA ( English: Receive Address, Chinese: Receive Address) is used to indicate the address information of the receiving end; optionally, as shown in FIG. 4, the frame structure of the data packet with a fixed data packet length may further include a Capability field, the Capability The field is used to indicate capability information of the site that sent the frame structure, such as supported bandwidth, rate, or currently available spectrum resources.
  • the Category field can be identified by using 4-bit information.
  • the frame type can be identified as a D2D discovery request frame by 0001, the type of the frame is 0010, and the type of the frame is a D2D link establishment request.
  • Frame, 1000 identifies the type of the frame as a D2D link setup response frame.
  • the embodiment of the present invention does not limit the identification of the category field in other manners to distinguish different frame types.
  • Step 103 Receive resource allocation information sent by an access point, where the resource allocation information includes a transmission resource identifier allocated by the access point for the station, a transmission resource identifier, and a random access request.
  • the type field in the corresponding.
  • the transmission resource identifier in the resource allocation information corresponding to the type field in the random access request specifically includes: when the type field of the data to be sent sent by the station to the access point is a data packet with a fixed data packet length, The access point allocates transmission resources according to the type field for the station to transmit the data packet with a fixed data packet length, and notifies the station by sending the resource allocation information, that is, the station receives the resource allocation information sent by the access point; when the station sends the access information to the access point
  • the access point allocates a transmission resource according to the type field, and uses the data packet whose station length is not fixed, and sends the resource allocation information to notify The site, that is, the site receives resource allocation information sent by the access point.
  • Step 104 Send data to be sent on a transmission resource of resource allocation information.
  • the access point determines, according to the type field of the data to be sent, whether the data packet whose station needs to be transmitted has a fixed data packet length, or whether the data packet whose data packet length is not fixed is transmitted.
  • the corresponding transmission resource is allocated to the site, so that the site sends the to-be-sent data on the allocated transmission resource.
  • step 104 specifically includes: the first D2D site is in the resource.
  • a D2D discovery request frame is transmitted on the transmission resource of the allocation information.
  • the first D2D station sends a D2D discovery request frame, which can be broadcast, multicast, or unicast.
  • the method includes :
  • Step 105 The first D2D site listens to the first resource allocation information sent by the access point, where the first resource allocation information includes a transmission resource identifier allocated by the access point to the second D2D station, where the transmission resource is used. Transmitting a D2D discovery response frame at the second D2D site.
  • the first D2D site needs to The transmission resource allocated by the access point for the second D2D site.
  • Step 106 Listen to the D2D discovery response frame sent by the second D2D station on the transmission resource of the first resource allocation information.
  • the first D2D site listens to the D2D discovery response frame sent by the first D2D site on the transmission resource of the first resource allocation information, the D2D discovery of the first D2D site and the second D2D site ends; if the first D2D site If the D2D discovery response frame sent by the first D2D station is not detected on the transmission resource of the first resource allocation information, the first D2D station may perform step 101 to re-run the random access procedure, if the random access procedure is retried If the D2D discovery response frame sent by the second D2D station is not detected after a certain number of times, the first D2D station abandons the random access.
  • step 104 specifically includes: the first D2D site is in the resource.
  • a D2D link establishment request frame is transmitted on the transmission resource of the allocation information.
  • the first D2D station sends a D2D link setup request frame, which can be broadcast, multicast, or unicast.
  • the method includes:
  • Step 107 The first D2D station listens to the third resource allocation information sent by the access point, where the third resource allocation information includes a transmission resource identifier allocated by the access point to the second D2D station, where the transmission The resource is used for the second D2D station to transmit the D2D link setup response frame.
  • the first D2D station needs to listen to the access point allocated for the second D2D site. Transfer resources.
  • Step 108 Listen to the D2D link setup response frame sent by the second D2D station on the transmission resource of the third resource allocation information.
  • the first D2D station listens to the D2D link setup response frame sent by the first D2D station on the transmission resource of the first resource allocation information, the D2D discovery of the first D2D site and the second D2D site ends; D2D site in the first resource allocation information
  • the first D2D station may perform step 101 to re-permit the random access procedure, if the retry random access procedure exceeds a certain number of times If the D2D link setup response frame sent by the second D2D station is not detected, the first D2D station abandons the random access.
  • the random access method may also be configured to send a random access request with data to be transmitted according to the prior art scheme to request to send a resource for transmitting specific resource request information, so that the access point according to the random access request And allocating transmission resources for transmitting specific resource request information, such as resource request information for transmitting information such as specific buffer, QoS, channel status, etc., for requesting resources for transmitting data.
  • the access point allocates resources for transmitting specific data according to the resource request information, and then the station performs data transmission on the resources allocated by the access point for transmitting specific data.
  • the second D2D site needs to perform before step 101. Listening to the D2D discovery request frame sent by the first D2D station. Therefore, as shown in FIG. 7, the method further includes:
  • Step 109 The second D2D site listens to the second resource allocation information sent by the access point, where the second resource allocation information includes a transmission resource identifier allocated by the access point to the first D2D station, where the transmission resource is used by the The first D2D station transmits a D2D discovery request frame.
  • the first D2D station needs to transmit the transmission resource allocated by the access point to the first D2D station, because the first D2D station needs to transmit the D2D discovery request frame on the transmission resource of the second resource allocation information allocated by the access point. .
  • Step 110 The second D2D station listens to the D2D discovery request frame sent by the first D2D station on the transmission resource of the second resource allocation information.
  • the second D2D station detects the D2D discovery request frame sent by the first D2D station on the transmission resource of the second resource allocation information, perform steps 101-104, and the resource allocation information of the second D2D station in step 104 is performed.
  • the D2D discovery response frame is sent on the transmission resource.
  • the second D2D site performs step 101.
  • the D2D link establishment request frame sent by the first D2D station needs to be intercepted. Therefore, as shown in FIG. 8, the method further includes:
  • Step 111 The second D2D site intercepting the access point sends the fourth resource allocation information, where the fourth resource allocation information includes the transmission resource identifier allocated by the access point to the first D2D station, where the transmission resource is used. Transmitting a D2D link setup request frame at the first D2D station.
  • the second D2D station needs to listen to the access point allocated for the first D2D site. Transfer resources.
  • Step 112 Listen to the D2D link establishment request frame sent by the first D2D station on the transmission resource of the fourth resource allocation information.
  • the second D2D station detects the D2D link establishment request frame sent by the first D2D station on the transmission resource of the fourth resource allocation information, perform steps 101-104, and the second D2D station is in the resource in step 104.
  • a D2D link setup response frame is transmitted on the transmission resource of the allocation information.
  • An embodiment of the present invention provides a random access method, where a station acquires a random access resource allocated by an access point, and sends a random access request to the access point on the random access resource, where the random access request includes the data to be sent by the station.
  • Type field the type of data to be sent includes a data packet with a fixed data packet length and a data packet with a fixed data packet length, so that the access point identifies the data to be transmitted according to the type of data carried in the random access request.
  • the point is the transmission resource identifier allocated by the station, and the transmission resource identifier corresponds to the type field in the random access request. Further, the station sends the to-be-sent data on the transmission resource of the resource allocation information. Compared with the prior art, in the embodiment of the present invention, the station carries the type field of the data to be sent in the random access request, so that the access point allocates the corresponding transmission resource according to the type field of the data to be sent, so that the station is allocated. Sending data to be sent on the transmission resource, The interaction process of the random access process is reduced, thereby reducing signaling transmission overhead and reducing delay.
  • An embodiment of the present invention provides a random access method, as shown in FIG. 9, including:
  • Step 201 The station acquires a random access resource allocated by the access point, where the random access resource includes a data packet with a fixed data packet length, and a random access resource randomly selected and a data packet whose data packet length is not fixed are randomly connected. Random access resources.
  • the data packet with fixed data packet length includes: a D2D discovery request frame, a D2D discovery response frame, a D2D link establishment request frame, and a D2D link establishment response frame; the data packet whose data packet length is not fixed includes: a D2D resource request frame, D2D data frame.
  • Step 202 Select, according to the type of the data packet to be sent, send a random access request on the corresponding random access resource, where the type of the to-be-sent data packet includes a data packet with a fixed data packet length and data with an unfixed data packet length. package.
  • a random access resource in which a data packet having a fixed packet length is randomly accessed is referred to as a first random access resource
  • a random access resource in which a packet whose data packet length is not fixed is randomly accessed is referred to as a random access resource.
  • the second random access resource when the type of the data packet to be sent sent by the station is a data packet with a fixed data packet length, the station selects the first random access resource, and sends the random access on the first random access resource.
  • the station selects the second random access resource, and sends a random access request to the second random access resource.
  • Step 203 Receive resource allocation information sent by the access point, where the resource allocation information includes a transmission resource identifier allocated by the access point for the station, where the transmission resource identifier corresponds to the selected random access resource.
  • step 201 and step 202 since the access point divides the random access resources allocated to the station into the first random access resource and the second random access resource, when the station is on the first random access resource, Access point when sending a random access request to an access point Confirming that the station needs to send a data packet with a fixed data packet length, and then allocating transmission resources for the station to transmit a data packet with a fixed data packet length, and notifying the station by sending resource allocation information, that is, the station receives the resource allocation information sent by the access point; When the station sends a random access request to the access point on the second random access resource, the access point confirms that the station needs to send a data packet whose data packet length is not fixed, and then allocates the transmission resource for the station to transmit the data packet length. The unfixed data packet informs the station by sending resource allocation information, that is, the station receives the resource allocation information sent by the access point.
  • Step 204 Send data to be sent on a transmission resource of resource allocation information.
  • the corresponding random access resource is selected according to the type of data to be sent, so that the access point determines that the length of the data packet that the station needs to transmit is fixed according to the random access resource selected by the station.
  • the data packet is also a data packet whose transmission data length is not fixed, and then allocates corresponding transmission resources to the station, so that the station sends the to-be-sent data on the allocated transmission resource, which reduces the random access process compared with the prior art.
  • the interaction process reduces signaling overhead and reduces latency.
  • the step is as follows: the first D2D site is located at the first D2D site.
  • a D2D discovery request frame is transmitted on the transmission resource of the resource allocation information.
  • the first D2D station sends a D2D discovery request frame, which can be broadcast, multicast, or unicast.
  • the peer site is the second D2D site, as shown in FIG.
  • the method also includes:
  • Step 205 The first D2D station listens to the first resource allocation information sent by the access point, where the first resource allocation information includes a transmission resource identifier allocated by the access point to a second D2D station, where the transmission The resource is used by the second D2D station to transmit a D2D discovery response frame.
  • Step 206 The first D2D station listens to the D2D discovery response frame sent by the second D2D station on the transmission resource of the first resource allocation information.
  • the first D2D station listens to the D2D discovery response frame sent by the first D2D station on the transmission resource of the first resource allocation information, the first D2D station and the second D2D The D2D discovery of the site ends; if the first D2D site does not hear the D2D discovery response frame sent by the first D2D site on the transmission resource of the first resource allocation information, the first D2D site may perform step 201 to re-randomize In the access procedure, if the D2D discovery response frame sent by the second D2D station is not detected after the random access procedure is retried for more than a certain number of times, the first D2D station abandons the random access.
  • the step is specifically: the first D2D site. Transmitting a D2D link establishment request frame on the transmission resource of the resource allocation information.
  • the first D2D station sends a D2D link setup request frame, which can be broadcast, multicast, or unicast.
  • the method further includes:
  • Step 207 The first D2D station listens to the third resource allocation information sent by the access point, where the third resource allocation information includes a transmission resource identifier allocated by the access point to the second D2D station, where the transmission The resource is used by the second D2D station to transmit a D2D link setup response frame;
  • Step 208 The first D2D station listens to the D2D link setup response frame sent by the second D2D station on the transmission resource of the third resource allocation information.
  • the first D2D station listens to the D2D link setup response frame sent by the first D2D station on the transmission resource of the first resource allocation information, the D2D discovery of the first D2D site and the second D2D site ends;
  • the D2D station does not detect the D2D link setup response frame sent by the first D2D station on the transmission resource of the first resource allocation information, and the first D2D station may perform step 201 to re-run the random access procedure. If the random access procedure does not hear the D2D link setup response frame sent by the second D2D station more than a certain number of times, the first D2D station abandons the random access.
  • the second D2D site performs step 201 before performing step 201.
  • the D2D discovery request frame sent by the first D2D station needs to be listened to. Therefore, as shown in FIG. 12, the method further includes:
  • Step 209 The second D2D station listens to the access point and sends the second resource allocation information, where the second resource allocation information includes a transmission resource identifier allocated by the access point to the first D2D station, where the transmission The resource is used by the first D2D station to transmit a D2D discovery request frame.
  • Step 210 Listen, on the transmission resource of the second resource allocation information, a D2D discovery request frame sent by the first D2D station.
  • the second D2D station detects the D2D discovery request frame sent by the first D2D station on the transmission resource of the second resource allocation information, perform steps 201-204, and the second D2D station in the resource allocation information in step 204
  • the D2D discovery response frame is sent on the transmission resource.
  • the second D2D site performs step 201.
  • the D2D link setup request frame sent by the first D2D station needs to be intercepted. Therefore, as shown in FIG. 13, the method further includes:
  • Step 211 The second D2D station listens to the access point and sends the fourth resource allocation information, where the fourth resource allocation information includes a transmission resource identifier allocated by the access point to the first D2D station, where the transmission Resource for the first D2D station to transmit a D2D link setup request frame
  • Step 212 Listen to the D2D link establishment request frame sent by the first D2D station on the transmission resource of the fourth resource allocation information.
  • the second D2D station detects the D2D link establishment request frame sent by the first D2D station on the transmission resource of the fourth resource allocation information, perform steps 301-304, and the second D2D station is in the resource in step 304.
  • a D2D link setup response frame is transmitted on the transmission resource of the allocation information.
  • An embodiment of the present invention provides a random access method, in which a station obtains a random access resource allocated by an access point, where the random access resource includes a data packet with a fixed data packet length to perform random access random access resources and A random access resource for randomly accessing a data packet whose data packet length is not fixed; and selecting to send a random access request on the corresponding random access resource according to the type of the data packet to be sent, the type of the to-be-sent data packet includes Packets with fixed packet lengths and packets with unfixed packet lengths, access
  • the point knows whether the data packet whose data length needs to be transmitted by the station is fixed, or the data packet whose transmission data length is not fixed, and then sends the resource allocation information to the site, where the resource allocation information includes The transmission resource identifier allocated by the access point to the station, the transmission resource identifier corresponding to the selected random access resource, and the data to be sent is sent on the transmission resource of the resource allocation information.
  • the station selects the random access resource allocated by the access point, so that the access point allocates the corresponding transmission resource according to the selected random access resource, so that the station is on the allocated transmission resource.
  • Sending data to be sent reduces the interaction process of the random access process, thereby reducing signaling transmission overhead and reducing delay.
  • An embodiment of the present invention provides a random access method, as shown in FIG. 14, including:
  • Step 301 The access point allocates a random access resource to the station.
  • the random access resource is a resource required to send a random access request to the access point when the site has new data to be sent but no uplink resource is allocated.
  • Step 302 Receive a random access request sent by the station on the random access resource, where the random access request includes a type field of data to be sent by the station, and the type of the data to be sent includes a data packet and data with a fixed data packet length. A packet whose packet length is not fixed.
  • the data packet with fixed data packet length includes: a D2D discovery request frame, a D2D discovery response frame, a D2D link establishment request frame, and a D2D link establishment response frame; the data packet whose data packet length is not fixed includes: a D2D resource request frame, D2D data frame.
  • Step 303 Send resource allocation information to the station, where the resource allocation information includes a transmission resource identifier allocated by the access point to the station, where the transmission resource identifier is related to a type field in the random access request. correspond.
  • the access point When the access point receives the data type of the data to be sent sent by the station as a data packet with a fixed data packet length, the access point allocates a transmission resource according to the type field for the station to transmit the data packet with a fixed data packet length.
  • Send resource allocation information to the station Point when the access point receives the type field of the data to be sent sent by the station as a data packet whose data length is not fixed, the access point allocates the transmission resource according to the type field for the station transmission data packet length is not fixed.
  • Step 304 Receive data to be sent sent by the station on the transmission resource of the resource allocation information.
  • the embodiment of the present invention provides a random access method, where the access point determines, according to the type field of the data to be sent in the random access request sent by the station, whether the data packet whose station needs to be transmitted has a fixed length, or whether the data packet length is not The fixed data packet, and then the corresponding transmission resource is allocated to the site, so that the site sends the to-be-sent data on the allocated transmission resource, which reduces the interaction process of the random access process and reduces the signaling transmission overhead. , reduce the delay.
  • An embodiment of the present invention provides a random access method, as shown in FIG. 15, including:
  • Step 401 The access point allocates a random access resource to the station, where the random access resource includes a data packet with a fixed data packet length, and a random access resource and a data packet whose data packet length is not fixed are randomly connected. Random access resources.
  • the data packet with fixed data packet length includes: a D2D discovery request frame, a D2D discovery response frame, a D2D link establishment request frame, and a D2D link establishment response frame; the data packet whose data packet length is not fixed includes: a D2D resource request frame, D2D data frame.
  • Step 402 Receive a random access request sent by the station according to the type of the to-be-sent data packet, and send the data packet to be sent on the corresponding random access resource, where the type of the data packet to be sent includes a data packet with a fixed data packet length and a data packet length. Unfixed packets.
  • a random access resource in which a data packet having a fixed packet length is randomly accessed is referred to as a first random access resource
  • a random access resource in which a packet whose data packet length is not fixed is randomly accessed is referred to as a random access resource.
  • the second random access resource when the type of the data packet to be sent sent by the station is a data packet with a fixed data packet length, the site selection The first random access resource, then, the access point receives the random access request sent by the station in the first random access resource; when the type of the to-be-sent data packet sent by the station is a data packet whose data length is not fixed, the site The second random access resource is selected, and then the access point receives the random access request sent by the station on the second random access resource.
  • Step 403 Send resource allocation information to the station, where the resource allocation information includes a transmission resource identifier allocated by the access point to the station, where the transmission resource identifier is related to the random access resource selected by the station. correspond.
  • step 401 and step 402 since the access point divides the random access resources allocated to the station into the first random access resource and the second random access resource, when the access point receives the site at the first When a random access request is sent on a random access resource, the access point confirms that the station needs to send a data packet with a fixed data packet length, and then allocates the transmission resource for the station to transmit a data packet with a fixed data packet length, and sends the resource allocation through the transmission.
  • the information informs the station; when the access point receives the random access request sent by the station on the second random access resource, the access point confirms that the station needs to send a data packet whose data length is not fixed, and then allocates the transmission resource for use.
  • the station transmits a packet whose data packet length is not fixed, and informs the site by sending resource allocation information.
  • Step 404 Receive data to be sent sent by the station on the transmission resource of the resource allocation information.
  • An embodiment of the present invention provides a random access method, where an access point determines, according to a random access resource selected by a station when sending a random access request, whether a data packet whose data length needs to be transmitted by the station is fixed, or a packet length.
  • the data packet is not fixed, and the corresponding transmission resource is allocated to the site, so that the site sends the to-be-sent data on the allocated transmission resource, which reduces the interaction process of the random access process and reduces the signaling transmission compared with the prior art.
  • Overhead reduce latency.
  • the embodiment of the present invention implements D2D discovery by using the random access method described in Embodiment 1 and Embodiment 3.
  • the application scenario of the method is as shown in FIG. 2, STA1 and STA2 are close to each other, and STA1 wants to interconnect with STA2 by sending a D2D discovery request frame, thereby implementing direct data transmission between STA1 and STA2.
  • STA1 and STA2 The communication between each site and the AP is a random access procedure.
  • the D2D discovery by STA1 and STA2 is taken as an example. It is assumed that STA1 is the initiator of the D2D discovery (ie, the source site), and STA2 is the counterpart of the D2D transmission that STA1 wants to discover (ie, the target site), as shown in FIG. 16. As shown, specific:
  • Step 501 STA1 acquires a random access resource allocated by the access point AP.
  • the AP may allocate a part of the random access resources to the D2D service (as shown by the slanted part in FIG. 17(a)), and the random access resource may be located in FIG. 17(a).
  • the signaling (eg, SIG) portion shown may also be located in the UL subframe portion.
  • the random access resource is located in an uplink transmission period. For example, if the random access resource includes n orthogonal random access codes, then m orthogonal random access codes may be allocated to the D2D service.
  • Step 502 STA1 sends a random access request to the AP on the allocated random access resource, and correspondingly, the AP receives the random access request sent by STA1.
  • the random access request sent by the STA1 to the AP includes a type field of the data to be sent by the STA1, and the data to be sent is a D2D discovery request frame.
  • STA1 may transmit 1-bit information in the random access code sent to the AP, where the 1-bit information is used to indicate that this is the STA1 sending D2D discovery request frame field.
  • the STA1 when the STA1 needs to send a resource request for transmitting a neighboring discovery request, the random access resource dedicated to the D2D service allocated by the AP is used, and the 1-bit information is carried as an example for description.
  • Step 503 The AP sends the first MAP information to STA1.
  • the AP When the AP receives the random access request sent by the STA1, it determines, according to the 1-bit information in the random access request, that the STA1 needs to send a D2D discovery request frame with a fixed data packet length, and further allocates a transmission resource for the STA1 to transmit the D2D discovery request frame.
  • the AP identifies the transmission resource allocated to the STA1 in the first MAP information, and sends the first MAP information that identifies the transmission resource allocated to the STA1 to the STA1. As shown in FIG. 17(a), the AP is in the first MAP.
  • the transmission resource allocated to the STA1 is identified by the D2D indicator, and the resource for transmitting the D2D discovery request (D2D discovery request) identified by the D2D indicator is located on a downlink transmission time slot (DL subframe).
  • DL subframe downlink transmission time slot
  • Step 504 STA1 listens to the first MAP message sent by the AP in the first preset time. interest.
  • Step 505 If the STA1 detects the first MAP information sent by the AP within the first preset time, the STA1 broadcasts the D2D discovery request frame on the transmission resource indicated by the first MAP information.
  • the Category field in the D2D discovery request frame sent by the STA1 indicates that the frame is a D2D discovery request frame
  • the TA indicates the address information of the STA1
  • the RA indicates the address information of the STA2
  • the Capability field indicates the bandwidth and rate supported by the STA1. Or information such as currently available spectrum resources.
  • STA1 If STA1 does not hear the first MAP information sent by the AP within the first preset time, STA1 performs step 501 again. If the retry exceeds a certain number of times and still does not receive the first MAP transmission indication sent by the AP, the random access procedure is abandoned.
  • Step 506 The STA2 listens to the first MAP information sent by the AP to the STA1, and listens to the D2D discovery request frame broadcast by the STA1 on the transmission resource indicated by the first MAP information.
  • step 507 is performed.
  • Step 507 If STA2 detects the D2D discovery request frame sent by STA1, STA2 acquires the random access resource allocated by the AP.
  • Step 508 STA2 sends a random access request to the AP on the allocated random access resource, and correspondingly, the AP receives STA2 to send a random access request.
  • STA2 Since STA2 detects that the D2D discovery request frame sent by STA1 is related to itself, STA2 needs to send a D2D Discovery Response frame (English: D2D Discovery Response) to STA1. To send a D2D discovery response frame to STA1, STA2 needs to send to AP. The application requests the transmission of the transmission resource of the D2D discovery response frame. Therefore, STA2 sends a random access request to the AP, and the random access request carries 1-bit information for declaring that this is a D2D discovery response frame with a fixed transmission packet length.
  • D2D Discovery Response frame English: D2D Discovery Response
  • Step 509 The AP sends the second MAP information to the STA2 according to the random access request sent by the STA2.
  • the AP When the AP receives the random access request sent by STA2, it is based on the random access request.
  • the 1-bit information in the determination determines that STA2 needs to transmit a D2D discovery response frame. Therefore, the transmission resource for transmitting the D2D discovery response frame is allocated to STA2, and the allocated transmission resource is indicated in the second MAP information transmitted to STA2.
  • the AP identifies the transmission resource allocated to STA2 through the D2D indicator in the second MAP, and the resource for transmitting the D2D discovery response frame identified by the D2D indicator is located in the downlink transmission slot (DL/UL). On the subframe).
  • Step 510 The STA2 listens to the second MAP information sent by the AP in the second preset time.
  • Step 511 If STA2 detects the second MAP information sent by the AP in the second preset time, STA2 sends a D2D discovery response frame to STA1 on the transmission resource indicated in the second MAP information.
  • the frame structure of the D2D discovery response frame is shown in FIG. 4.
  • the Category field in the D2D discovery response frame sent by the STA2 indicates that the frame is a D2D discovery response
  • the TA indicates the address information of the STA2
  • the RA indicates the STA1.
  • Address information indicates the negotiation of STA2 and STA1 to establish link establishment in the subsequent D2D link establishment process.
  • STA2 If STA2 does not hear the second MAP information sent by the AP within the second preset time, STA2 performs step 507 again. If the second MAP information sent by the AP is not detected after the retry exceeds a certain number of times, STA2 abandons the random access procedure.
  • Step 512 The STA1 listens to the second MAP information sent by the AP to the STA2, and monitors, on the transmission resource indicated by the second MAP information, whether the STA2 sends a D2D discovery response frame.
  • Step 513 If STA1 detects the D2D discovery response frame sent by STA2, STA1 and STA2 actively discover that the establishment is complete.
  • STA1 If STA1 does not hear the D2D discovery response frame sent by STA2, STA1 performs step 501 to re-execute the D2D discovery request procedure. If the D2D request response sent by STA2 is not received after the retry exceeds a certain number of times, the D2D active discovery process is abandoned.
  • the “first” and “second” in the first MAP information and the second MAP information are only used to distinguish the AP from the source site and the target site, and at the same time, the source site and the target site.
  • the “first” and “second” in the first MAP information and the second MAP information are only used to distinguish the AP from the source site and the target site, and at the same time, the source site and the target site.
  • the embodiment of the present invention provides a random access method, by carrying a type field of data to be sent in a random access request, so that the access point determines, according to the type field of the data to be sent, data that the station needs to transmit a fixed data packet length.
  • the packet is also transmitted with a data packet whose data length is not fixed, and then the corresponding transmission resource is allocated to the site, so that the station sends the to-be-sent data on the allocated transmission resource, which reduces the interaction of the random access process compared with the prior art.
  • the process further reduces signaling transmission overhead and reduces latency.
  • the embodiment of the present invention implements D2D discovery by using the random access method described in the second embodiment and the fourth embodiment.
  • the application scenario of the method is as shown in FIG. 2, STA1 and STA2 are close to each other, and STA1 wants to send a D2D discovery request frame. Interconnection with STA2 to implement direct data transmission between STA1 and STA2. For STA1 and STA2, the communication between each station and the AP is a random access procedure.
  • the embodiment of the present invention is described by taking the D2D discovery by STA1 and STA2 as an example. It is assumed that STA1 is the initiator of the D2D discovery (ie, the source site), and STA2 is the counterpart of the D2D transmission that STA1 wants to discover (ie, the target site), as shown in FIG. 18. As shown, specific:
  • Step 601 STA1 acquires a random access resource allocated by the access point AP.
  • the random access resource allocated by the AP to the STA1 and the STA2 includes a random access resource with a random packet length and a random access resource with a random data packet with a random packet length.
  • the AP may specifically allocate a part of the random access resources to the D2D service (as shown by the slashes and double slashes in FIG. 19), and at the same time,
  • the resources allocated exclusively to the D2D service are divided into first random access resources for transmitting data packets with fixed data packet lengths such as a D2D discovery request frame, a D2D discovery response frame, a D2D link establishment request frame, and a D2D link establishment response frame. (as shown by the slanted line in FIG. 19), and a second random access resource for transmitting a data packet whose D2D resource request frame, data frame, and the like is not fixed in length (as shown by the double slash in FIG. 19). ).
  • Step 602 STA1 sends a random access request to the first random access resource.
  • the AP correspondingly, receives the random access request sent by STA1 on the first random access resource.
  • the STA1 selects the first random access resource to send a random access request, and the random access request includes STA1, because the data to be sent by the STA1 is a D2D transmission request frame, and the length of the D2D discovery request frame is fixed. Send the type field of the D2D send request frame.
  • Step 603 The AP sends the first MAP information to STA1.
  • the AP When the AP receives the random access request sent by the STA1 on the first random access resource, it determines that the STA1 needs to send a D2D discovery request frame with a fixed data packet length, and further allocates a transmission resource for the STA1 to transmit the D2D discovery request frame, where the AP is
  • the first MAP information identifies the transmission resource allocated to the STA1, and transmits the first MAP information that identifies the transmission resource allocated to the STA1 to the STA1.
  • Step 604 The STA1 listens to the first MAP information sent by the AP in the first preset time.
  • Step 605 If the STA1 detects the first MAP information sent by the AP within the first preset time, the STA1 broadcasts the D2D discovery request frame on the transmission resource indicated by the first MAP information.
  • the structure of the D2D discovery request frame sent by STA1 is shown in FIG. 4, where the Category field in the D2D discovery request frame sent by STA1 indicates that the frame is a D2D discovery request frame, and the TA indicates the address of STA1.
  • Information indicates the address information of STA2
  • the Capability field indicates information such as the bandwidth, rate, or currently available spectrum resources supported by STA1.
  • STA1 If STA1 does not hear the first MAP information sent by the AP within the first preset time, STA1 performs step 601 again. If the retry exceeds a certain number of times and still does not receive the first MAP transmission indication sent by the AP, the random access procedure is abandoned.
  • Step 606 The STA2 listens to the first MAP information sent by the AP to the STA1, and listens to the D2D discovery request frame broadcast by the STA1 on the transmission resource indicated by the first MAP information.
  • step 607 is performed.
  • Step 607 If STA2 detects the D2D discovery request frame sent by STA1, STA2 acquires the random access resource allocated by the AP.
  • Step 608 The STA2 sends a random access request to the AP on the allocated random access resource, and correspondingly, the AP receives the STA2 to send a random access request.
  • STA2 Since STA2 detects that the D2D discovery request frame sent by STA1 is related to itself, STA2 needs to send a D2D discovery response frame to STA1. To send a D2D discovery response frame to STA1, STA2 needs to apply to the AP to transmit a D2D discovery response frame. The resource is transmitted. Therefore, STA2 sends a random access request to the AP, and the random access request carries 1-bit information for declaring that this is a D2D discovery response frame with a fixed length of the transmitted data packet.
  • Step 609 When the AP receives the random access request sent by the STA2, it determines, according to the 1-bit information in the random access request, that the STA2 needs to send the D2D discovery response frame, and therefore allocates the transmission resource for transmitting the D2D discovery response frame to the STA2.
  • the allocated transmission resource is indicated in the second MAP information sent to STA2.
  • Step 610 The STA2 listens to the second MAP information sent by the AP in the second preset time.
  • Step 611 If STA2 detects the second MAP information sent by the AP in the second preset time, STA2 sends a D2D discovery response frame to STA1 on the transmission resource indicated in the second MAP information.
  • the frame structure of the D2D discovery response frame is shown in FIG. 4, wherein the Category field indicates that the frame is a D2D discovery response, the TA indicates the address information of the STA2, the RA indicates the address information of the STA1, and the Capability field indicates that the STA2 and the STA1 are in the subsequent D2D.
  • the Category field indicates that the frame is a D2D discovery response
  • the TA indicates the address information of the STA2
  • the RA indicates the address information of the STA1
  • the Capability field indicates that the STA2 and the STA1 are in the subsequent D2D.
  • STA2 If STA2 does not detect the second MAP information sent by the AP within the second preset time, STA2 performs step 607 again. If the second MAP information sent by the AP is not detected after the retry exceeds a certain number of times, STA2 abandons the random access procedure.
  • Step 612 The STA1 listens to the second MAP information sent by the AP to the STA2, and listens to the D2D discovery response frame sent by the STA2 on the transmission resource indicated by the second MAP information.
  • Step 613 If STA1 detects the D2D discovery response frame sent by STA2, STA1 and STA2 actively discover that the establishment is complete.
  • STA1 If STA1 does not hear the D2D discovery response frame sent by STA2, STA1 performs step 601 to re-execute the D2D discovery request procedure. If the D2D request response sent by STA2 is not received after the retry exceeds a certain number of times, the D2D active discovery process is abandoned.
  • the “first” and “second” in the first MAP information and the second MAP information are only used to distinguish the AP from the source site and the target site, and at the same time, the source site and the target site.
  • the specific steps of the D2D link establishment refer to the method in the embodiment of the present invention, and details are not described herein again.
  • the embodiment of the present invention provides a random access method, where a station selects a corresponding random access resource according to the type of data to be sent, so that the access point determines the length of the data packet that the station needs to transmit according to the random access resource selected by the station.
  • Process interaction process which reduces signaling overhead and reduces latency.
  • An embodiment of the present invention provides a site, as shown in FIG. 20, including:
  • the obtaining unit 2001 is configured to acquire a random access resource allocated by the access point
  • the sending unit 2002 is configured to send a random access request to the access point on the random access resource, where the random access request includes a type field of data to be sent by the station, and a type of the data to be sent.
  • the receiving unit 2003 is configured to receive resource allocation information sent by the access point, where the resource allocation information includes a transmission resource identifier allocated by the access point to the station, the transmission resource identifier and the random access
  • the type field in the request corresponds
  • the sending unit 2002 is further configured to send the to-be-sent data on a transmission resource of the resource allocation information.
  • the data packet with a fixed data packet length includes: a terminal-to-terminal D2D discovery request frame, a D2D discovery response frame, a D2D link establishment request frame, and a D2D link establishment response frame;
  • the data packet whose data packet length is not fixed includes: a D2D resource request frame and a D2D data frame.
  • the sending unit 2002 where the data to be sent is sent on the transmission resource of the resource allocation information, specifically includes: the sending unit 2002 in the resource allocation information A D2D discovery request frame is sent on the transmission resource.
  • the site further includes: a first listening unit 2004;
  • the first intercepting unit 2004 is configured to: after the sending unit 2002 sends a D2D discovery request frame on the transmission resource of the resource allocation information, listen to the first resource allocation information sent by the access point, where The first resource allocation information includes a transmission resource identifier allocated by the access point to a second D2D station, where the transmission resource is used by the second D2D station to transmit a D2D discovery response frame;
  • the first intercepting unit 2004 is further configured to: listen to the D2D discovery response frame sent by the second D2D station on the transmission resource of the first resource allocation information.
  • the sending unit 2002 where the data to be sent is sent on the transmission resource of the resource allocation information, specifically includes: the sending unit 2002 in the resource allocation information A D2D link setup request frame is transmitted on the transmission resource.
  • the site further includes: a second intercepting unit 2005;
  • the second intercepting unit 2005 is configured to listen to the third resource allocation information sent by the access point after the sending unit 2002 sends the D2D link establishment request frame on the transmission resource of the resource allocation information.
  • the third resource allocation information includes a transmission resource identifier allocated by the access point to a second D2D station, where the transmission resource is used by the second D2D station to transmit a D2D link establishment response frame;
  • the second intercepting unit 2005 is further configured to transmit the third resource allocation information. On the transmission resource, the D2D link establishment response frame sent by the second D2D station is intercepted.
  • the site further includes: a third intercepting unit 2006;
  • the third intercepting unit 2006 is configured to listen to the second resource allocation information sent by the access point, the second resource allocation, before the acquiring unit 2001 acquires the random access resource allocated by the access point.
  • the information includes a transmission resource identifier allocated by the access point to the first D2D station, where the transmission resource is used by the first D2D station to transmit a D2D discovery request frame;
  • the third intercepting unit 2006 is further configured to listen to the D2D discovery request frame sent by the first D2D station on the transmission resource of the second resource allocation information.
  • the sending, by the sending unit 2002, the data to be sent on the transmission resource of the resource allocation information specifically includes: the sending unit 2002 transmitting a D2D discovery response frame on the transmission resource of the resource allocation information.
  • the site further includes: a fourth intercepting unit 2007;
  • the fourth intercepting unit 2007 is configured to: after the acquiring unit 2001 acquires the random access resource allocated by the access point, listen to the access point to send the fourth resource allocation information, where the fourth resource allocation
  • the information includes a transmission resource identifier allocated by the access point to the first D2D station, where the transmission resource is used by the first D2D station to transmit a D2D link establishment request frame;
  • the fourth intercepting unit 2007 is further configured to: listen, on the transmission resource of the fourth resource allocation information, a D2D link establishment request frame sent by the first D2D station.
  • the sending, by the sending unit 2002, the data to be sent, on the transmission resource of the resource allocation information specifically includes: sending, by the sending unit 2002, a D2D link setup response frame on a transmission resource of the resource allocation information. .
  • the embodiment of the present invention provides a station, by carrying a type field of data to be sent in a random access request, so that the access point determines, according to the type field of the data to be sent, a data packet whose data length needs to be transmitted by the station is fixed, or Transmitting a data packet whose data packet length is not fixed, and then allocating corresponding transmission resources to the site, so that the station sends the to-be-sent data on the allocated transmission resource, which reduces random access compared with the prior art.
  • Process interaction process which reduces signaling overhead and reduces latency.
  • An embodiment of the present invention provides a site, as shown in FIG. 23, including:
  • the obtaining unit 2301 is configured to acquire a random access resource allocated by the access point, where the random access resource includes a random access resource with a random data packet and a data packet whose data packet length is not fixed. Random access resources for random access;
  • the sending unit 2302 is configured to select to send a random access request on the corresponding random access resource according to the type of the data to be sent, where the type of the to-be-sent data packet includes a data packet with a fixed data packet length and a data packet length is not fixed.
  • the receiving unit 2303 is configured to receive resource allocation information sent by the access point, where the resource allocation information includes a transmission resource identifier allocated by the access point to the station, the transmission resource identifier and the selected random Access resources correspond;
  • the sending unit 2302 is further configured to send the to-be-sent data on a transmission resource of the resource allocation information.
  • the data packet with a fixed data packet length includes: a terminal-to-terminal D2D discovery request frame, a D2D discovery response frame, a D2D link establishment request frame, and a D2D link establishment response frame;
  • the data packet whose data packet length is not fixed includes: a D2D resource request frame and a D2D data frame.
  • the sending unit 2302 where the data to be sent is sent on the transmission resource of the resource allocation information, specifically includes: the sending unit 2302 in the resource allocation information A D2D discovery request frame is sent on the transmission resource.
  • the site further includes: a first intercepting unit 2304;
  • the first intercepting unit 2304 is configured to: after the sending unit 2302 sends a D2D discovery request frame on the transmission resource of the resource allocation information, listen to the first resource allocation information sent by the access point, where The first resource allocation information includes a transmission resource identifier allocated by the access point to a second D2D station, where the transmission resource is used by the first Two D2D stations transmit D2D discovery response frames;
  • the first intercepting unit 2304 is further configured to: listen to the D2D discovery response frame sent by the second D2D station on the transmission resource of the first resource allocation information.
  • the sending unit 2302 where the data to be sent is sent on the transmission resource of the resource allocation information, specifically includes: the sending unit 2302 in the resource allocation information A D2D link setup request frame is transmitted on the transmission resource.
  • the method further includes: a second intercepting unit 2305;
  • the second intercepting unit 2305 is configured to listen to the third resource allocation information sent by the access point after the sending unit 2302 sends a D2D link setup request frame on the transmission resource of the resource allocation information.
  • the third resource allocation information includes a transmission resource identifier allocated by the access point to the second D2D station, where the transmission resource is used by the second D2D station to transmit a D2D link establishment response frame;
  • the second intercepting unit 2305 is further configured to: on the transmission resource of the third resource allocation information, listen to a D2D link setup response frame sent by the second D2D station.
  • the site further includes: a third intercepting unit 2306;
  • the third intercepting unit 2306 is configured to: after the obtaining unit 2301 acquires the random access resource allocated by the access point, listen to the access point to send the second resource allocation information, where the second resource allocation
  • the information includes a transmission resource identifier allocated by the access point to the first D2D station, where the transmission resource is used by the first D2D station to transmit a D2D discovery request frame;
  • the third intercepting unit 2306 is further configured to: listen to the D2D discovery request frame sent by the first D2D station on the transmission resource of the second resource allocation information.
  • the sending, by the sending unit 2302, the data to be sent, on the transmission resource of the resource allocation information specifically includes: sending, by the sending unit 2302, a D2D discovery response frame on a transmission resource of the resource allocation information.
  • the site further includes: a fourth listening unit 2307;
  • the fourth intercepting unit 2307 is configured to: after the acquiring unit 2301 acquires the random access resource allocated by the access point, listen to the access point to send the fourth resource allocation information, the fourth resource allocation
  • the information includes a transmission resource identifier allocated by the access point to the first D2D station, where the transmission resource is used by the first D2D station to transmit a D2D link establishment request frame;
  • the fourth intercepting unit 2307 is further configured to: listen, on the transmission resource of the fourth resource allocation information, a D2D link establishment request frame sent by the first D2D station.
  • the sending, by the sending unit 2302, the data to be sent, on the transmission resource of the resource allocation information specifically includes: sending, by the sending unit 2302, a D2D link setup response frame on a transmission resource of the resource allocation information. .
  • the embodiment of the present invention provides a station, which selects a corresponding random access resource according to the type of data to be sent, so that the access point determines that the length of the data packet that the station needs to transmit is fixed according to the random access resource selected by the station.
  • the data packet is also a data packet whose transmission data length is not fixed, and then allocates corresponding transmission resources to the station, so that the station sends the to-be-sent data on the allocated transmission resource, which reduces the random access process compared with the prior art.
  • the interaction process reduces the signaling transmission overhead and reduces the delay.
  • An embodiment of the present invention provides an access point, as shown in FIG. 26, including:
  • the allocating unit 2601 is configured to allocate, by the access point, a random access resource to the station;
  • the receiving unit 2602 is configured to receive a random access request sent by the station on the random access resource, where the random access request includes a type field of data to be sent by the station, where the type of the data to be sent includes A packet with a fixed packet length and a packet with a fixed packet length;
  • the sending unit 2603 is configured to send resource allocation information to the station, where the resource allocation information includes a transmission resource identifier allocated by the access point to the station, where the transmission resource identifier is in the random access request Type field corresponding;
  • the receiving unit 2602 is further configured to receive data to be sent sent by the station on a transmission resource of the resource allocation information.
  • the data packet with fixed data packet length includes: terminal to terminal D2D a discovery request frame, a D2D discovery response frame, a D2D link establishment request frame, and a D2D link establishment response frame;
  • the data packet whose data packet length is not fixed includes: a D2D resource request frame and a D2D data frame.
  • the embodiment of the present invention provides an access point, where the access point determines, according to the type field of the data to be sent in the random access request sent by the station, whether the data packet whose station needs to be transmitted has a fixed length, or whether the data packet length is not fixed.
  • the data packet, and then the corresponding transmission resource is allocated to the site, so that the site sends the to-be-sent data on the allocated transmission resource, which reduces the interaction process of the random access process and reduces the signaling transmission overhead, compared with the prior art. Reduce the delay.
  • An embodiment of the present invention provides an access point, as shown in FIG. 27, including:
  • the allocating unit 2701 is configured to allocate a random access resource to the station, where the random access resource includes a data packet with a fixed data packet length, a random access resource for random access, and a data packet with a fixed data packet length for random connection. Random access resources;
  • the receiving unit 2702 is configured to receive, according to the type of the data packet to be sent, a random access request sent on the corresponding random access resource, where the type of the to-be-sent data packet includes a data packet with a fixed data packet length and a packet whose data packet length is not fixed;
  • the sending unit 2703 is configured to send resource allocation information to the station, where the resource allocation information includes a transmission resource identifier allocated by the access point to the station, and the transmission resource identifier is randomly selected from the site selection.
  • the resource allocation information includes a transmission resource identifier allocated by the access point to the station, and the transmission resource identifier is randomly selected from the site selection.
  • the receiving unit 2702 is further configured to receive data to be sent sent by the station on a transmission resource of the resource allocation information.
  • the data packet with a fixed data packet length includes: a terminal-to-terminal D2D discovery request frame, a D2D discovery response frame, a D2D link establishment request frame, and a D2D link establishment response frame;
  • the data packet whose data packet length is not fixed includes: a D2D resource request frame and a D2D data frame.
  • An embodiment of the present invention provides an access point, where an access point determines, according to a random access resource selected by a station when sending a random access request, whether a data packet whose station needs to be transmitted has a fixed length, or whether the data packet length is not The fixed data packet, and then the corresponding transmission resource is allocated to the site, so that the site sends the to-be-sent data on the allocated transmission resource, which reduces the interaction process of the random access process and reduces the signaling transmission overhead. , reduce the delay.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
  • the software functional units described above are stored in a storage medium and include instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform portions of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (ROM), and a random access memory (Random Access).
  • Memory referred to as RAM
  • disk or optical disk and other media that can store program code.

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Abstract

La présente invention se rapporte au domaine technique des communications. Un procédé d'accès aléatoire, un site et un point d'accès (AP) sont procurés dans des modes de réalisation de la présente invention, lesquels permettent de raccourcir une procédure d'interaction pour un processus d'accès aléatoire, de réduire le coût de la transmission de signalisation et de diminuer le temps de propagation. Le procédé d'accès aléatoire comprend : l'acquisition, par un site, d'une ressource d'accès aléatoire allouée par un point AP (101) ; la transmission d'une demande d'accès aléatoire au point AP par l'intermédiaire de la ressource d'accès aléatoire, la demande d'accès aléatoire contenant un champ concernant le type de données à transmettre par le site, le type des données à transmettre comprenant un paquet de données de longueur fixe et un paquet de données de longueur variable (102) ; la réception d'informations d'allocation de ressource transmises par le point AP, les informations d'allocation de ressource contenant une identification de ressource de transmission attribuée pour le site par le point AP, l'identification de la ressource de transmission correspondant au champ concernant le type dans la demande d'accès aléatoire (103) ; et la transmission des données à transmettre par l'intermédiaire d'une ressource de transmission dans les informations d'allocation de ressource (104).
PCT/CN2015/073206 2015-02-16 2015-02-16 Procédé d'accès aléatoire, site et point d'accès Ceased WO2016131182A1 (fr)

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