Transmission method and device in wireless local area network

Patent metadata

Field	Value
Publication number	US-9414267-B2
Application number	US-201113883417-A
Country	US
Kind code	B2
Filing date	Jul 26, 2011
Priority date	Nov 4, 2010
Publication date	Aug 9, 2016
Grant date	Aug 9, 2016

Abstract

The disclosure claims a transmission method and device in WLAN, wherein the method includes: a transmitting STA or a receiving STA performing channel detection and/or channel scanning on a channel of the first channel set and/or the second channel set; if the result of the detection and/or scanning satisfies a preset condition, the transmitting STA and the receiving STA exchanging a reservation message on the channel of the first channel set or the second channel set, wherein the reservation message is configured to reserve a channel of the second channel set for transmission; the transmitting STA transmits a data frame to the receiving STA on the reserved channel of the second channel set; and after receiving the data frame, the receiving STA transmits acknowledgement information of the data frame on the channel of the first channel set or the second channel set.

First claim

What is claimed is:

1. A transmission method in Wireless Local Area Network (WLAN), comprising:
a transmitting Station (STA) or a receiving STA performing channel detection on a channel of a first channel set; or, a transmitting STA or a receiving STA performing channel detection on a channel of a second channel set; or, a transmitting STA or a receiving STA performing channel detection on a channel of a first channel set and a second channel set; or, a transmitting STA or a receiving STA performing channel scanning on a channel of a first channel set; or, a transmitting STA or a receiving STA performing channel scanning on a channel of a second channel set; or, a transmitting STA or a receiving STA performing channel scanning on a channel of a first channel set and a second channel set; or, a transmitting STA or a receiving STA performing channel detection and channel scanning on a channel of a first channel set; or, a transmitting STA or a receiving STA performing channel detection and channel scanning on a channel of a second channel set or, a transmitting STA or a receiving STA performing channel detection and channel scanning on a channel of a first channel set and a second channel set,
if result of the detection satisfies a preset condition, or, if result of the scanning satisfies a preset condition, or, if result of the detection and the scanning satisfies a preset condition, then the transmitting STA and the receiving STA exchanging a reservation message on the channel of the first channel set or the second channel set, wherein the reservation message is configured to reserve a channel of the second channel set for transmission;
the transmitting STA transmitting a data frame to the receiving STA on the reserved channel of the second channel set; and
after receiving the data frame, the receiving STA transmitting acknowledgement information of the data frame on the channel of the first channel set or the second channel set;
wherein the step of the transmitting STA and the receiving STA reserving the channel of the second channel set for transmission comprises: the transmitting STA and the receiving STA exchanging the reservation message on the channel to be reserved of the second channel set, or the transmitting STA and the receiving STA exchanging the reservation message on the channel, which is overlapped with the channel to be reserved, of the first channel set; wherein the reservation message carries: occupancy time required for transmission on the channel to be reserved.

2. The method according to claim 1 , wherein if result of the detection satisfies a preset condition, or, if result of the scanning satisfies a preset condition, or, if result of the detection and the scanning satisfies a preset condition, the method further comprises:
the transmitting STA performing receiving or transmission of a radio frame of a first type, which is different from the data frame, with the receiving STA on the channel of the first channel set.

3. The method according to claim 2 , wherein the radio frame of the first type comprises a management frame.

4. The method according to claim 1 , wherein before the transmitting STA and the receiving STA exchanging the reservation message, the method further comprises:
the transmitting STA transmitting a radio frame, which is configured to reserve length of time required for transmitting one or more data frames, on the channel of the first channel set.

5. The method according to claim 1 , wherein before the transmitting STA transmitting the data frame to the receiving STA on the reserved channel of the second channel set, the method further comprises:
the transmitting STA transmitting indication information to the receiving STA, wherein the indication information indicates at least one of: channel bandwidth to be reserved, and the channel set which the channel to be reserved belongs to.

6. The method according to claim 5 , wherein the indication information is carried by a way of: carrying the indication information in the reservation message, or carrying the indication information via other message before transmitting the reservation message.

7. The method according to claim 1 , wherein whether the result of the detection satisfies the preset condition, or, the result of the scanning satisfies the preset condition, or, the result of the detection and the scanning satisfies the preset condition is determined via steps of:
determining whether the channel without interference exists in the first channel set and the second channel set, or, whether the channel of which value of interference signal is less than a preset threshold exists; and
if yes, then determining that the result of the detection satisfies the preset condition, or, the result of the scanning satisfies the preset condition; or, the result of the detection and the scanning satisfies the preset condition.

8. The method according to claim 1 , wherein before the transmitting STA transmitting the data frame to the receiving STA on the reserved channel of the second channel set, the method further comprises:
the transmitting STA notifying the receiving STA of a transmission mode via a signaling, wherein the transmission mode comprises: the transmitting STA and the receiving STA exchanging the reservation message on the channel of the first channel set or the second channel set, and reserving the channel of the channel configured to be used for transmission; the transmitting STA and the receiving STA transmitting the data frame on the reserved channel; and
after receiving the data frame, the receiving STA transmitting acknowledgement of the data frame on the channel of the first channel set or the second channel set.

9. The method according to claim 8 , wherein the step of the transmitting STA notifying the receiving STA of the transmission mode via signaling comprises:
the transmitting STA carrying information of frequency planning class, which the first channel set and the second channel set belong to, in a management frame transmitted on the channel of the first channel set.

10. The method according to claim 1 , wherein channel bandwidth formed by channels of the first channel set comprises: 20 MHz, 40 MHz, and 80 MHz; and channel bandwidth formed by channels of the second channel set comprises: 20 MHz, 40 MHz, 80 MHz, and 120 MHz.

11. The method according to claim 1 , wherein the first channel set and the second channel set are channel sets formed by adopting different channelization methods for a same frequency band, wherein a center frequency point of the channel of the first channel set is different from a center frequency point of the channel of the second channel set, and the channel of the first channel set and the channel of the second channel set are fully or partly overlapped.

12. A transmission device in Wireless Local Area Network (WLAN), which is arranged in a transmission device, comprising: a hardware processor and program units stored in a memory, and the hardware is configured to execute the program units, the program units comprising:
a detection unit, configured to perform channel detection on a channel of a first channel set; or, perform channel detection on a channel of a second channel set; or, perform channel detection on a channel of a first channel set and a second channel set; or, perform channel scanning on a channel of a first channel set; or, perform channel scanning on a channel of a second channel set; or, perform channel scanning on a channel of a first channel set and a second channel set; or, perform channel detection and channel scanning on a channel of a first channel set; or, perform channel detection and channel scanning on a channel of a second

Assignees

• Li Nan
• Lv Kaiying
• Sun Bo
• Li Feng
• Zte Corp

Inventors

• Li Nan
• Lv Kaiying
• Sun Bo
• Li Feng

Classifications

• H04L27/0006

  Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio (for spectrum sharing between different networks H04W16/14) · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L5/006

  Quality of the received signal, e.g. BER, SNR, water filling · CPC title

• H04W28/26 Primary

  Resource reservation · CPC title

• H04L25/0204

  of multiple channels · CPC title