Method and System for Channel Data Transmission in Wireless Network

• US 20130176954A1
• Filed: 07/27/2011
• Published: 07/11/2013
• Est. Priority Date: 09/30/2010
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Lv, Kaiying, Sun, Bo, Li, Nan, Li, Feng
• Granted Patent: US 8,982,819 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 28/20 Negotiating bandwidth
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02

Abstract

The present invention discloses a method and system for channel data transmission in a wireless network. The method includes: after a transmitting station and a receiving station determine a channel bandwidth to use for data transmission by interaction and negotiation, the transmitting station transmitting data to the receiving station with the determined channel bandwidth. The present invention further discloses a transmitting station. The present invention can solve the existing collision problem caused by contention for channels between the hidden stations and the current transmission stations, and thus can take full advantage of the effective transmission bandwidth in the large bandwidth system of a wireless network and increase the frequency spectrum utilization of large bandwidth, and at the same time ensure the backward compatibility with the large bandwidth system and its co-existence with conventional systems.

Claims

1. A method for channel data transmission in a wireless network, comprising:

after a transmitting station and a receiving station determine a channel bandwidth to use for data transmission by interaction and negotiation, the transmitting station transmitting data to the receiving station with the determined channel bandwidth.

2. The method for channel data transmission according to claim 1, wherein, the step of a transmitting station and a receiving station determining a channel bandwidth to use for data transmission by interaction and negotiation comprises:

both the transmitting station and the receiving station exchanging a radio frame on their respective channels, and acquiring information about available channels of both the receiving station and the transmitting station by detecting the exchanged radio frame on the channel of the local station and/or obtaining indication information of available channels carried in the exchanged radio frame;

the transmitting station selecting and determining the channel bandwidth to use for transmitting the data to the receiving station in units of data frames according to the acquired information about available channels of both the receiving station and the transmitting station.

3. The method for channel data transmission according to claim 2, wherein, the step of the transmitting station and the receiving station acquiring information about available channels of both the receiving station and the transmitting station by detecting the exchanged radio frame on the channel of the local station comprises:

the transmitting station detecting basic channel bandwidths which are idle currently from all basic channel bandwidths on a maximum working bandwidth of the local station, and transmitting a radio frame to the receiving station on the detected one or more basic channel bandwidths which are idle currently, to request for channel subscription;

the receiving station acquiring the information about the available channels of the transmitting station by receiving the radio frame transmitted by the transmitting station on one or more basic channel bandwidths including a main channel of the receiving station, and returning a radio frame to the transmitting station on one or more basic channel bandwidths, which are detected from the available channels of the transmitting station and are available currently for the local station, to acknowledge the channel subscription;

the transmitting station acquiring the information about the available channels of both the transmitting station and the receiving station by receiving the radio frame, which are returned by the receiving station, on one or more basic channel bandwidths including a main channel of the local station.

4. The method for channel data transmission according to claim 2, wherein, the step of the transmitting station and the receiving station acquiring information about available channels of both the receiving station and the transmitting station by detecting the exchanged radio frame on the channel of the local station and/or obtaining indication information of available channels carried in the exchanged radio frame comprises:

the transmitting station detecting basic channel bandwidths which are idle currently from all basic channel bandwidths on the maximum working bandwidth of the local station, and transmitting a radio frame carrying first indication information of available channels to the receiving station on the detected one or more basic channel bandwidths which are idle currently, to request for channel subscription, wherein, the first indication information of available channels is used to indicate channel bandwidth information to use for transmitting the radio frame or available channel bandwidth information of the local station;

the receiving station acquiring the information about available channels of the transmitting station by receiving the radio frame on one or more basic channel bandwidths including a main channel of the local station and decoding the first indication information of available channels from the received radio frame, and returning a radio frame to the transmitting station on one or more basic channel bandwidths, which are detected from the available channels of the transmitting station and are available currently for the local station, to acknowledge the channel subscription; and

the transmitting station acquiring the information about available channels of both the receiving station and the transmitting station by receiving the radio frame returned by the receiving station on one or more basic channel bandwidths including a main channel of the local station.

5. The method for channel data transmission according to claim 2, wherein, the step of the transmitting station and the receiving station acquiring information about available channels of both the receiving station and the transmitting station by detecting the exchanged radio frame on the channel of the local station and/or obtaining indication information of available channels carried in the exchanged radio frame comprises:

the transmitting station detecting basic channel bandwidths which are idle currently from all basic channel bandwidths on the maximum working bandwidth of the local station, and transmitting a radio frame carrying first indication information of available channels to the receiving station on the detected one or more basic channel bandwidths which are idle currently, to request for channel subscription, wherein, the first indication information of available channels is used to indicate channel bandwidth information to use for transmitting the radio frame or available channel bandwidth information of the local station;

the receiving station acquiring the information about available channels of the transmitting station by receiving the radio frame on one or more basic channel bandwidths including a main channel of the local station and decoding the first indication information of available channels from the received radio frame, and returning a radio frame carrying second indication information of available channels to the transmitting station on one or more basic channel bandwidths, which are detected from the available channels of the transmitting station and are available currently for the local station, to acknowledge the channel subscription, wherein, the second indication information of available channels is used to indicate channel bandwidth information to use for returning the radio frame or available channel bandwidth information of the local station;

the transmitting station acquiring the information about available channels of both the receiving station and the transmitting station by receiving the radio frame returned by the receiving station on one or more basic channel bandwidths including a main channel of the local station and decoding the second indication information of available channels from the received radio frame.

6. The method for channel data transmission according to claim 2, wherein, the step of the transmitting station and the receiving station acquiring information about available channels of both the receiving station and the transmitting station by detecting the exchanged radio frame on the channel of the local station and/or obtaining indication information of available channels carried in the exchanged radio frame comprises:

the transmitting station detecting basic channel bandwidths which are idle currently from all basic channel bandwidths on the maximum working bandwidth of the local station, and transmitting a radio frame to the receiving station on the detected one or more basic channel bandwidths which are idle currently, to request for channel subscription;

the receiving station acquiring the information about available channels of the transmitting station by receiving the radio frame on one or more basic channel bandwidths including a main channel of the local station and decoding the first indication information of available channels from the received radio frame, and returning a radio frame carrying second indication information of available channels to the transmitting station on one or more basic channel bandwidths, which are detected from the available channels of the transmitting station and are available currently of the local station, to acknowledge the channel subscription, wherein, the second indication information of available channels is used to indicate channel bandwidth information to use for returning the radio frame or available channel bandwidth information of the local station;

the transmitting station acquiring the information about available channels of both the receiving station and the transmitting station by receiving the radio frame returned by the receiving station on one or more basic channel bandwidths including a main channel of the local station and decoding the second indication information of available channels from the received radio frame.

7. The method for channel data transmission according to claim 2, wherein, the step of the transmitting station and the receiving station acquiring information about available channels of both the receiving station and the transmitting station by detecting the exchanged radio frame on the channel of the local station and/or obtaining indication information of available channels carried in the exchanged radio frame comprises:

the receiving station detecting basic channel bandwidths which are idle currently from all basic channel bandwidths on the maximum working bandwidth of the local station, and transmitting a radio frame to the transmitting station on the detected one or more basic channel bandwidths which are idle currently, or transmitting a radio frame carrying second indication information of available channels to the transmitting station on the detected one or more basic channel bandwidths which are idle currently, to acknowledge the channel subscription, wherein, the second indication information of available channels is used to indicate channel bandwidth information to use for returning the radio frame or available channel bandwidth information of the local station;

the transmitting station acquiring the information about available channels of both the receiving station and the transmitting station by receiving the radio frame transmitted by the receiving station on one or more basic channel bandwidths including a main channel of the local station and/or decoding the second indication information of available channels from the received radio frame.

9. The method for channel data transmission according to claim 2, wherein, the transmitting station is configured to select and determine the channel bandwidth to use for transmitting the data to the receiving station in units of data frames according to the acquired information about available channels of both the receiving station and the transmitting station using any one of the following three modes:

mode one;

selecting any basic channel bandwidth as the transmitting channel bandwidth to transmit a data frame of the basic channel bandwidth;

mode two;

selecting one channelization bandwidth being double times of the basic channel bandwidth as the transmitting channel bandwidth, to transmit a data frame of one channelization bandwidth;

mode three;

after selecting and determining the channel bandwidth to use for transmitting the data to the receiving station in units of data frames, postponing the data frame to be transmitted, competing for the next transmission opportunity for transmission after backoff.

10. The method for channel data transmission according to claim 1, further comprising:

the transmitting station selecting and determining the channel bandwidth to use for transmitting the data to the receiving station in units of data frames, to use for one or more continuous data frame transmissions between the transmitting station and the receiving station;

or to use for one or more data frame transmissions between the transmitting station and the receiving station within limit time of one transmission opportunity.

11. The method for channel data transmission according to claim 10, further comprising:

when competing for the channels in a distributed coordination function mode, if the data frame transmitted by the transmitting station carries one or more complete service protocol data units or management protocol control frames, the currently selected and determined channel bandwidth is merely the bandwidth to use for transmitting the current data frame; and

if data frame transmitted by the transmitting station carries segment sub-units corresponding to one service protocol data unit or management protocol control frame, the currently selected and determined channel bandwidth is merely the bandwidth to use for the current data frame and subsequently carrying the segment sub-units corresponding to the service protocol data unit or the management protocol control frame;

when competing for the channels in an enhanced distributed coordination access function mode, if the transmitting station transmits one data frame to the receiving station in one transmission opportunity and subsequent one or more data bursts in the current transmission opportunity are still directed to the receiving station, the currently selected and determined channel bandwidth is the bandwidth to use for the current data frame and one or more data frames subsequently transmitted to the receiving station; and

if the transmitting station transmits one data frame to the receiving station in one transmission opportunity and subsequent data frames in the current transmission opportunity are directed to other receiving stations, the currently selected and determined channel bandwidth is merely the bandwidth to use for the current data frame.

8. (canceled)

12. A system for channel data transmission in a wireless network, comprising a transmitting station and a receiving station, wherein,

the transmitting station is configured to, after determining a channel bandwidth to use for data transmission by interaction and negotiation with the receiving station, transmit data to the receiving station with the determined channel bandwidth;

and

the receiving station is configured to corporate with the transmitting station for interaction with the local station.

13. The system for channel data transmission according to claim 12, wherein,

both the transmitting station and the receiving station are further configured to exchange a radio frame on respective channels, and acquire information about available channels of both the receiving station and the transmitting station by detecting the exchanged radio frame on the channel of the local station and/or obtaining indication information of available channels carried in the exchanged radio frame;

and

the transmitting station is further configured to select and determine the channel bandwidth to use for transmitting the data to the receiving station in units of data frames according to the acquired information about available channels of both the receiving station and the transmitting station.

15. The system for channel data transmission according to claim 12, wherein, the transmitting station is configured to transmit data to the receiving station with the determined channel bandwidth using the following modes:

selecting any basic channel bandwidth as the transmitting channel bandwidth to transmit a data frame of the basic channel bandwidth;

or selecting one channelization bandwidth being double times of the basic channel bandwidth as the transmitting channel bandwidth, to transmit a data frame of one channelization bandwidth;

or after selecting and determining the channel bandwidth to use for transmitting the data to the receiving station in units of data frames, postponing the data frame to be transmitted, and competing for the next transmission opportunity for transmission after backoff.

16. The system for channel data transmission according to claim 12, wherein, the transmitting station is further configured to select and determine the channel bandwidth to use for transmitting the data to the receiving station in units of data frames, to use for one or more continuous data frame transmissions between the transmitting station and the receiving station;

or to use for one or more data frame transmissions between the transmitting station and the receiving station within limit time of one transmission opportunity.

14. (canceled)

17. A transmitting station, comprising a channel bandwidth determining module and a data transmitting module, wherein,

the channel bandwidth determining module is configured to determine a channel bandwidth to use for data transmission by interaction and negotiation with a receiving station;

the data transmitting module is configured to transmit data to the receiving station with the determined channel bandwidth.

18. The transmitting station according to claim 17, wherein, the channel bandwidth determining module comprises an information about available channels determining module and a channel bandwidth determining sub-module, wherein,

the information about available channels determining module is configured to exchange a radio frame on a channel thereof, and acquire information about available channels of both the receiving station and the transmitting station by detecting the exchanged radio frame on the channel of the local station and/or obtaining indication information of available channels carried in the exchanged radio frame;

the channel bandwidth determining sub-module is configured to select and determine the channel bandwidth to use for transmitting the data to the receiving station in units of data frames according to the acquired information about available channels of both the receiving station and the transmitting station.

19. The transmitting station according to claim 17, wherein,

the channel bandwidth determining module is further configured to select any basic channel bandwidth as the transmitting channel bandwidth;

and

the data transmitting module is further configured to transmit a data frame of one basic channel bandwidth.

20. The transmitting station according to claim 17, wherein,

the channel bandwidth determining module is further configured to select one channelization bandwidth being double times of the basic channel bandwidth as the transmitting channel bandwidth;

the data transmitting module is further configured to transmit a data frame of one channelization bandwidth.

21. The transmitting station according to claim 17, wherein,

the channel bandwidth determining module is further configured to select and determine the channel bandwidth to use for transmitting the data to the receiving station in units of data frames;

the data transmitting module is further configured to after the channel bandwidth determining module selects and determines the channel bandwidth to use for transmitting the data to the receiving station in units of data frames, postpone the data frame to be transmitted, and compete for the next transmission opportunity for transmission after backoff.

22. The transmitting station according to claim 17, wherein,

the channel bandwidth determining module is further configured to select and determine the channel bandwidth to use for transmitting the data to the receiving station in units of data frames;

and

the data transmitting module is further configured to use the channel bandwidth determined by the channel bandwidth determining module for one or more continuous data frame transmissions between the transmitting station and the receiving station;

or for one or more data frame transmissions between the transmitting station and the receiving station within limit time of one transmission opportunity.