Wireless communication system

• US 9,258,074 B2
• Filed: 02/20/2015
• Issued: 02/09/2016
• Est. Priority Date: 12/11/2000
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Kosaka, Minoru
• Primary Examiner(s): Harper, Kevin C
• Application Number:
  US14/626,977
• Publication Number:
  US 20150171981A1
• Time in Patent Office: 354 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04B 7/265 for channel frequency control
• CPC Class Codes: H04J 3/06 Synchronising arrangements for television systems H04N5/04; bit-synchronisation H04L7/00
• CPC Class Codes: H04J 3/1694 Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers Passive Optical Networks H04Q11/0062
• CPC Class Codes: H04J 4/00 Combined time-division and frequency-division multiplex systems H04J13/00 takes precedence ; data transmission H04L5/26; telemetry G08C15/00
• CPC Class Codes: H04W 56/002 Mutual synchronization
• CPC Class Codes: H04W 56/0035 detecting errors in frequency or phase
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/0816 with collision avoidance
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 92/18 between terminal devices

Abstract

A wireless communication system that includes a base station and one or more terminals carries out wireless data communication by use of a first frequency band. The wireless communication system includes a wireless access system that employs a CSMA/CA and/or TDMA/TDD system as the wireless access system of the wireless communication system and a control signal at the first frequency band is periodically broadcasts from the base station, where the control signal includes a control information configured to manage wireless data transmission by the one or more terminals. In addition to the first frequency band, one or more frequency bands different from the first frequency band for the wireless data transmission by the one or more terminals can be allocate by the base station, where the control signal at the first frequency band indicate the location of the one or more frequency bands which can be used.

Claims

1. A method for a wireless station of a wireless LAN to communicate wireless signals using a plurality of frequency bands, wherein the plurality of frequency bands includes a primary frequency band and at least one additional frequency band, the method comprising:

transmitting, by the wireless station, a wireless control signal via the primary frequency band to an additional wireless station, wherein the wireless control signal comprises a request to send communication data to the additional wireless station from the wireless station and a request to allocate a time period for transmitting the communication data;

receiving, at the wireless station, a wireless response signal from the additional wireless station in response to transmitting the wireless control signal, wherein the wireless response signal is received via the primary frequency band instead of the at least one additional frequency band, and indicates (i) an allocated time period and (ii) that the at least one additional frequency band is allocated to the wireless station for transmitting the communication data during the allocated time period; and

simultaneously transmitting, by the wireless station during the allocated time period, a first wireless communication data signal via the primary frequency band and at least one second wireless communication data signal via the at least one additional frequency band, wherein at least one of the first wireless communication data signal and the at least one second wireless communication data signal includes the communication data, and wherein the first wireless communication data signal and the at least one second wireless communication data signal are time-synchronized.

2. The method of claim 1, wherein the additional wireless station is a base station of the wireless LAN.

3. The method of claim 1, wherein the wireless station transmits signals via the wireless LAN using carrier sense multiple access with collision avoidance.

4. The method of claim 1, wherein the wireless station transmits signals via the wireless LAN using time division multiple access.

5. A method for a wireless station of a wireless LAN to communicate wireless signals using a using a plurality of frequency bands, wherein the plurality of frequency bands includes a primary frequency band and at least one additional frequency band, the method comprising:

receiving, by the wireless station, a wireless control signal via the primary frequency band from an additional wireless station, wherein the wireless control signal comprises a request to send communication data to the additional wireless station from the wireless station and a request to allocate a time period for transmitting the communication data;

transmitting, by the wireless station via the primary frequency band instead of the at least one additional frequency band, a wireless response signal in response to receiving the wireless control signal, wherein the wireless response signal indicates (i) an allocated time period and (ii) that the at least one additional frequency band is allocated to the wireless station for transmitting the communication data during the allocated time period; and

receiving, by the wireless station, a first wireless communication data signal having the communication data via the at least one additional frequency band, wherein the first wireless communication data signal received via the primary frequency band is time-synchronized with a second wireless communication data signal that is simultaneously transmitted using the primary frequency band.

6. The method of claim 5, wherein the wireless station is a base station of the wireless LAN.

7. The method of claim 5, further comprising using carrier-sensing to confirm available frequency bands and generate control information that indicates that the at least one additional frequency band is allocated for transmission of the communication data.

8. A wireless station of a wireless LAN configured to communicate wireless signals using a plurality of frequency bands, wherein the plurality of frequency bands includes a primary frequency band and at least one additional frequency band, the wireless station comprising:

a wireless signal processing circuit configured for;

receiving a wireless control signal via the primary frequency band from an additional wireless station, wherein the wireless control signal comprises a request to send communication data to the additional wireless station from the wireless station and a request to allocate a time period for transmitting the communication data,

transmitting, via the primary frequency band instead of the at least one additional frequency band, a wireless response signal in response to receiving the wireless control signal, wherein the wireless response signal indicates (i) an allocated time period and (ii) that the at least one additional frequency band is allocated to the wireless station for transmitting the communication data during the allocated time period, and

receiving a first wireless communication data signal having the communication data via the at least one additional frequency band, wherein the first wireless communication data signal received via the primary frequency band is time-synchronized with a second wireless communication data signal that is simultaneously transmitted using the primary frequency band; and

a control processing circuit configured for;

decoding, from the received wireless control signal, the request to send the communication data and the request to allocate the time period,

identifying the request to send the communication data and the request to allocate the time period for transmitting the communication data from the decoded wireless control signal, and

encoding the wireless response signal with control information indicating (i) the allocated time period and (ii) that the at least one additional frequency band is allocated to the wireless station for transmitting the communication data during the allocated time period.

9. The wireless station of claim 8, wherein the wireless station is configured for using carrier-sensing to confirm available frequency bands and generating control information that indicates that the at least one additional frequency band is allocated for transmission of the communication data.

10. The wireless station of claim 8, wherein the wireless signal processing circuit is further configured for transmitting and receiving the wireless signals via the wireless LAN using carrier sense multiple access with collision avoidance.

11. The wireless station of claim 8, wherein the wireless signal processing circuit is further configured for transmitting and receiving the wireless signals via the wireless LAN using time division multiple access.