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Clear to send (CTS) reply method and system

A technology that allows sending and sending of requests. It is applied in the field of communication and can solve problems such as occupying large resources, channel congestion, and reducing control accuracy.

Inactive Publication Date: 2012-03-21
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a CTS reply method, device and system to at least solve the problem that when a large number of TS / CTS exchanges occur in the MU-MIMO system, the number of control signaling is extremely large, and a large amount of resources are occupied during transmission. It will also cause channel blockage and reduce the accuracy of control.

Method used

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  • Clear to send (CTS) reply method and system
  • Clear to send (CTS) reply method and system
  • Clear to send (CTS) reply method and system

Examples

Experimental program
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Effect test

Embodiment 1

[0055] Assume that there is 1 AP and 6 STAs associated with the AP in the network, and the 6 STAs are represented as STA-1, STA-2, STA-3, STA-4, STA-5, STA-6; each A MU-MIMO group consists of a maximum of 4 STAs, and a MU-MIMO group with less than 4 STAs is still considered to be composed of 4 STAs, and the insufficient part can be considered to have virtual STAs.

[0056] The AP divides the STAs into multiple MU-MIMO groups according to their channel state information, and notifies the corresponding STAs of the grouping information. Assuming that there are enough group numbers, each group number indicates only one MU-MIMO group, and one of the group numbers For (STA-2, STA-6, STA-4, STA-1), the group number GroupID=2, the AP publishes this MU-MIMO grouping information, the information includes the group number GroupID=2, and is arranged in the order in the brackets above The identifiers of the four STAs are assumed to be represented by the MAC addresses of the STAs.

[0057]...

Embodiment 2

[0072] Suppose there is 1 AP and 9 STAs associated with the AP in the network, and the 9 STAs are represented as STA-1, STA-2, STA-3, STA-4, STA-5, STA-6, STA- 7, STA-8, STA-9; each MU-MIMO group consists of up to 4 STAs, and the MU-MIMO group with less than 4 STAs is still considered to be composed of 4 STAs, and the insufficient part can be considered to have virtual STAs exist.

[0073] The AP divides each STA into multiple MU-MIMO groups according to their channel state information, and notifies the STAs of all the group information. Assuming that there are not enough group numbers, each group number can indicate multiple MU-MIMO groups. However, there are A constraint condition, if the same STA appears in multiple MU-MIMO groups indicated by the same group number, then the relative position of the STA in these groups is fixed.

[0074] If the group number GroupID=2 in this embodiment indicates three MU-MIMO groups, the three groups are (STA-5, STA-6, STA-7, STA-1), (STA-...

Embodiment 3

[0089] Suppose there is 1 AP and 9 STAs associated with the AP in the network, and the 9 STAs are represented as STA-1, STA-2, STA-3, STA-4, STA-5, STA-6, STA- 7, STA-8, STA-9; each MU-MIMO group consists of up to 4 STAs, and the MU-MIMO group with less than 4 STAs is still considered to be composed of 4 STAs, and the insufficient part can be considered to have virtual STAs exist.

[0090] The AP divides each STA into multiple MU-MIMO groups according to their channel state information, and notifies the STAs of all the group information. Assuming that there are not enough group numbers, each group number can indicate multiple MU-MIMO groups. However, there are A constraint condition, if the same STA appears in multiple MU-MIMO groups indicated by the same group number, then the relative position of the STA in these groups within the group is fixed.

[0091] If the group number GroupID=2 in this embodiment indicates three MU-MIMO groups, the three groups are (STA-5, STA-6, STA...

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Abstract

The invention discloses a clear to send (CTS) reply method, CTS reply equipment and a CTS reply system. The method comprise the following steps of: transmitting a request to send (RTS) frame from an access point (AP) to a station (STA) related to the AP, wherein the RTS frame comprises the group numbers of multi-user multiple input multiple output (MU-MIMO) groups for performing CTS reply on the RTS frame, every MU-MIMO group comprises at least one STA, and the group number of the MU-MIMO group wherein the RTS frame is positioned is the same as the group number included in the RTS frame; determining STAs which require CTS reply according to preset information, and determining the CTS replying sequence according to the preset information; and replying CTS in sequence according to the determined sequence. By adopting the method and the system, a large quantity of resources can be saved, and the control security is enhanced.

Description

technical field [0001] The invention relates to the communication field, in particular to a method for allowing sending of a CTS reply and a CTS system. Background technique [0002] WLAN (Wireless Local Area Networks, wireless local area network) is the application of wireless communication technology to interconnect computer equipment to form a network system that can communicate with each other and realize resource sharing. The essential feature of WLAN is that it no longer uses communication cables to connect computers to the network, but connects them wirelessly, so that the construction of the network and the movement of terminals are more flexible. IEEE (Institute of Electrical and Electronics Engineers, Institute of Electrical and Electronics Engineers) 802.11 is one of the mainstream technologies of wireless local area networks at present. This protocol mainly stipulates the physical layer PHY and MAC (Media Access Control, Media Access Control) layer specifications...

Claims

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Application Information

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IPC IPC(8): H04W28/06H04W28/18H04L1/16
CPCH04W74/0816H04B7/0452
Inventor 田开波李峰姜静李楠
Owner ZTE CORP
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