Method and apparatus for network allocation vector resetting

A technology of network allocation vector and reset method, which is applied in the field of network allocation vector reset method and device, can solve the problems that various stations cannot compete for channels fairly, and achieve the effect of improving utilization rate

Inactive Publication Date: 2012-09-26
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The main purpose of the present invention is to provide a network allocation vector reset method and device, to at least solve the problem that each station cannot compete for the channel fairly when the above frame exchange sequence fails

Method used

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  • Method and apparatus for network allocation vector resetting
  • Method and apparatus for network allocation vector resetting
  • Method and apparatus for network allocation vector resetting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This embodiment provides a NAV reset method, see image 3 , the method includes the following steps:

[0023] Step S302, the wireless station receives the wireless frame, wherein the wireless frame carries time length indication information, which means that the wireless frame contains or indicates the time length;

[0024] The wireless frame is one or more wireless frames sent by the sender to obtain the current transmission opportunity, which can be an NDPA frame or a polling (Sounding Poll) frame; the wireless station refers to the information in the NDPA or Sounding Poll frame Stations that update the NAV, for example, listen stations for transceiver stations.

[0025] Step S304, the wireless station updates the local NAV according to the above time length indication information;

[0026] The specific update method of the NAV in this embodiment can be implemented with reference to related technologies, and will not be described in detail here;

[0027] Step S306,...

Embodiment 2

[0043] This embodiment provides a NAV reset method, and the frame exchange sequence of this embodiment is described by taking NDPA-NDP-1stSND FB as an example. see Figure 4 Schematic diagram of NAV reset. After the sending station wins the competition and tries to obtain the TXOP, it sends the NDPA frame as the first frame, and sends the NDP after the SIFS time after the NDPA frame. The first feedback station identified by the NDPA defaults after the SIFS after the NDP ends. Feedback, the sender and receiver obtain TXOP through NDPA-NDP-1stSND FB frame exchange. Here, the 1stSND FB may be a response frame Null FB frame without feedback information.

[0044] The listening station has correctly received the NDPA frame, and set its own NAV through the information of the NDPA frame. If the listening station does not receive the physical layer to start receiving the primitive PHY- RXSTART.indication (that is, the physical layer does not generate a report of receiving a radio fra...

Embodiment 3

[0047] This embodiment provides a NAV reset method, and the frame exchange sequence of this embodiment is described by taking the Poll-SND FB as an example. The sending station wins the competition. When trying to obtain TXOP, the sending (Sounding) Poll frame is used as the first frame. The feedback station identified in the Poll frame will give feedback after SIFS after the Poll frame ends, and the sending and receiving parties exchange Poll-SND FB frames to obtain TXOP. .

[0048] The observer station correctly receives the Poll frame, and sets its own NAV through the information of the Poll frame. If the observer station is (2×aSIFSTime)+(SND FB_Time)+(2×aSlotTime)+aPHY-RX - Within the START-Delay period (ie, the specified period of time in Embodiment 1), if the physical layer start receiving primitive PHY-RXSTART.indication is not received, then the listening station can reset its own NAV. Here, SND FB_Time refers to the feedback SND FB transmission time that the listeni...

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Abstract

The invention provides a method and apparatus for network allocation vector (NAV) resetting. The method comprises the following steps that: a radio station receives a radio frame carrying time length indication information; the radio station updates a local NAV according to the time length indication information; and the radio station determines whether a frame switch sequence initiated by the radio frame is failed to be sent; if so, the NAV is reset. According to the invention, a problem that all stations can not compete for channels fairly when a frame switch sequence is failed can be solved, thereby enabling all the radio stations to compete for channels quickly and further improving a channel utilization rate.

Description

technical field [0001] The present invention relates to the communication field, in particular to a network allocation vector (Network Allocation Vector, NAV) reset method and device. Background technique [0002] At present, in the wireless network field, the wireless local area network (Wireless Local Area Network, WLAN) develops rapidly, the demand for WLAN coverage is increasing day by day, and the requirement for throughput is also getting higher and higher. In the IEEE802.11 group of the Institute of Electrical and Electronics Engineers industry specification, a series of standards such as 802.11a, 802.11b, 802.11g, etc. have been defined successively. Specifications for technical improvement, for example, the 802.11n task group puts forward the requirement of high throughput (High Throughput, referred to as HT), supporting a data rate up to 600Mbps, and the 802.11ac task group further proposes the concept of VHT (Very High Throughput), by introducing more The large c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08
Inventor 邢卫民吕开颖姜静孙波
Owner ZTE CORP
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