Wireless communication system

• US 9,025,528 B2
• Filed: 12/20/2012
• Issued: 05/05/2015
• 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:
  US13/722,636
• Publication Number:
  US 20130114475A1
• Time in Patent Office: 866 Days
• Field of Search: None
• US Class Current: 370/328
• 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 wireless communication system having a base station and one or more terminals, the wireless communication system carrying out wireless data communication by use of a prime frequency band, the wireless communication system comprising:

a wireless access system configured to employ a CSMA/CA and/or TDMA/TDD system as the wireless access system of the wireless communication system;

wherein only the base station is configured to periodically broadcast a control signal at the prime frequency band to set the prime frequency band for all terminals wirelessly connected to the base station to indicate the prime frequency band for the all terminals, wherein the control signal comprises a control information configured to manage wireless data transmission by the all terminals;

wherein the base station is further configured to allocate, in addition to the prime frequency band, one or more frequency bands different from the prime frequency band that can be used for the wireless data transmission by the all terminals, wherein the control signal at the prime frequency band indicates the location of the one or more frequency bands;

wherein the control signal of the base station is set on the prime frequency band by the all terminals to make a time synchronization between the base station and the all terminals by the control signal, wherein the time synchronization is maintained by subsequent control signals at the prime frequency band being transmitted from the base station periodically and received by each of the all terminals;

wherein the control signal is not transmitted at the one or more frequency bands for any of the all terminals, wherein the control signal comprises the control information to manage wireless data transmission by the all terminals being utilized instead of any control signal at the one or more frequency bands that is configured to manage the wireless data transmission by any of the all terminals at the one or more frequency bands, and wherein the all terminal are configured, based on the time synchronization by the control signal at the prime frequency band and the control information at the prime frequency band configured to manage the wireless data transmission by the all terminals, to time-synchronize and simultaneously carry out the wireless data transmission at the one or more frequency bands and the wireless data transmission at the prime frequency band.

2. A base station of a wireless communication system having the base station and one or more terminals, the wireless communication system carrying out wireless data communication by use of a prime frequency band, the base station comprising:

a wireless access system configured to employ a CSMA/CA and/or TDMA/TDD system as the wireless access system of the wireless communication system;

wherein the base station is configured to set the prime frequency band for all terminals wirelessly connected to the base station by periodically broadcasting a control signal at the prime frequency band only by the base station to indicate the prime frequency band for the all terminals, wherein the control signal comprises a control information configured to manage wireless data transmission by the all terminals;

wherein the base station is further configured to allocate, in addition to the prime frequency band, one or more frequency bands different from the prime frequency band that can be used for the wireless data transmission by the all terminals, wherein the control signal at the prime frequency band indicates the location of the one or more frequency bands;

wherein the control signal of the base station is scanned on the prime frequency band by the all terminals to make a time synchronization between the base station and the all terminals by the control signal, wherein the time synchronization is maintained by subsequent control signals at the prime frequency band being transmitted from the base station periodically and received by each of the all terminals;

wherein the control signal is not transmitted at the one or more frequency bands for any of the all terminals, wherein the control signal comprises the control information at the prime frequency band being utilized instead of any control signal at the one or more frequency bands that is configured to manage the wireless data transmission by any of the all terminals at the one or more frequency bands, and wherein, based on the time synchronization of the wireless communication system by the control signal at the prime frequency band and the control information at the prime frequency band configured to manage the wireless data transmission by the all terminals, the wireless data transmission by the all terminals at the one or more frequency bands and the wireless data transmission by the all terminals at the prime frequency band can be time-synchronized and simultaneously carried out.

3. A terminal of a wireless communication system having a base station and one or more terminals, the wireless communication system carrying out wireless data communication by use of a prime frequency band, the terminal comprising:

a wireless access system configured to employ a CSMA/CA and/or TDMA/TDD system as the wireless access system of the wireless communication system;

wherein the terminal receives a periodically-broadcasted control signal, wherein the prime frequency band is set for the terminal wirelessly connected to a base station with the periodically-broadcasted control signal at the prime frequency band only by the base station to indicate the prime frequency band for the terminal, wherein the control signal comprises a control information configured to manage wireless data transmission by the terminal;

wherein the terminal is configured to use, in addition to the prime frequency band, one or more frequency bands different from the prime frequency band for the wireless data transmission by the terminal, wherein the control signal at the prime frequency band indicates the location of the one or more frequency bands which is allocated by the base station;

wherein the terminal is further configured to scan the control signal of the base station on the prime frequency band to make a time synchronization between the base station and the terminal by the control signal, wherein the time synchronization is maintained by subsequent control signals at the prime frequency band transmitted from the base station periodically and received by the terminal;

wherein the control signal is not transmitted at the one or more frequency bands for the terminal, wherein the terminal is configured to utilize the control signal comprising the control information at the prime frequency band instead of any control signal at the one or more frequency bands that is configured to manage the wireless data transmission by the terminal at the one or more frequency bands, and wherein, based on the time synchronization of the wireless communication system by the control signal at the prime frequency band and the control information at the prime frequency band configured to manage the wireless data transmission by the terminal, the terminal is configured to time-synchronize and simultaneously carry out the wireless data transmission at the one or more frequency bands and the wireless data transmission at the prime frequency band.

4. A wireless communication method for carrying out wireless data communication by use of a prime frequency band, the wireless communication method comprising:

employing a CSMA/CA and/or TDMA/TDD system as a wireless access system of a wireless communication system;

setting the prime frequency band for all terminals wirelessly connected to a base station by periodically broadcasting a control signal at the prime frequency band only by the base station to indicate the prime frequency band for the all terminals, wherein the control signal comprises a control information configured to manage wireless data transmission by the all terminals;

allocating, in addition to the prime frequency band, one or more frequency bands different from the prime frequency band that can be used for the wireless data transmission by the all terminals, wherein the control signal at the prime frequency band indicates the location of the one or more frequency bands; and

scanning the control signal of the base station on the prime frequency band by the all terminals to make a time synchronization between the base station and the all terminals by the control signal, wherein the time synchronization is maintained by subsequent control signals at the prime frequency band transmitted from the base station periodically and received by each of the all terminals;

wherein the control signal is not transmitted at the one or more frequency bands for any of the all terminals, wherein the control signal comprises the control information to manage wireless data transmission by the all terminals being utilized instead of any control signal at the one or more frequency bands that is configured to manage the wireless data transmission by any of the all terminals at the one or more frequency bands, and based on the time synchronization by the control signal at the prime frequency band and the control information at the prime frequency band configured to manage the wireless data transmission by the all terminals, wherein the wireless data transmission by the all terminals at the one or more frequency bands and the wireless data transmission by the all terminals at the prime frequency band can be time-synchronized and simultaneously carried out.

7. The wireless communication method of claim 4, the wireless communication method further comprising:

scanning a first set of frequency bands with a carrier sense by the base station to search another same wireless communication system or other radio system.

8. The wireless communication method of claim 7, the wireless communication method further comprising:

selecting the one or more frequency bands based on the result of the scanning of the first set of frequency bands.

9. The wireless communication method of claim 8, the wireless communication method further comprising:

changing the one or more frequency bands to new one or more frequency bands or cancelling the one or more frequency bands by the control signal of the base station on the prime band.

10. The wireless communication method of claim 4, the wireless communication method further comprising:

scanning a second set of frequency bands that can be used by a terminal of the all terminals with a carrier sense by the terminal.

11. The wireless communication method of claim 7, the wireless communication method further comprising:

scanning a second set of frequency bands that can be used by a terminal of the all terminals with a carrier sense by the terminal.

12. The wireless communication method of claim 8, the wireless communication method further comprising:

scanning a second set of frequency bands that can be used by a terminal of the all terminals with a carrier sense by the terminal.

13. The wireless communication method of claim 9, the wireless communication method further comprising:

scanning a second set of frequency bands that can be used by a terminal of the all terminals with a carrier sense by the terminal.

14. The wireless communication method of claim 4, the wireless communication method further comprising:

sensing the prime frequency bands and the one or more frequency bands by the terminal before transmitting data using the one or more frequency bands by the terminal.

15. The wireless communication method of claim 7, the wireless communication method further comprising:

sensing the prime frequency bands and the one or more frequency bands by the terminal before transmitting data using the one or more frequency bands by the terminal.

16. The wireless communication method of claim 8, the wireless communication method further comprising:

sensing the prime frequency bands and the one or more frequency bands by the terminal before transmitting data using the one or more frequency bands by the terminal.

17. The wireless communication method of claim 9, the wireless communication method further comprising:

sensing the prime frequency bands and the one or more frequency bands by the terminal before transmitting data using the one or more frequency bands by the terminal.

5. A wireless communication method for carrying out wireless data communication by use of a prime frequency band, the wireless communication method comprising:

employing a CSMA/CA and/or TDMA/TDD system as a wireless access system of a wireless communication system;

setting the prime frequency band for all terminals wirelessly connected to a base station by periodically broadcasting a control signal at the prime frequency band only by the base station to indicate the prime frequency band for the all terminals, wherein the control signal comprises a control information configured to manage wireless data transmission by all terminals;

allocating, in addition to the prime frequency band, one or more frequency bands different from the prime frequency band that can be used for the wireless data transmission by the all terminals, wherein the control signal at the prime frequency band indicate the location of the one or more frequency bands; and

scanning the control signal of the base station on the prime frequency band by the all terminals to make a time synchronization between the base station and the all terminals by the control signal, wherein the time synchronization is maintained by subsequent control signals at the prime frequency band transmitted from the base station periodically and received by each of the all terminals;

wherein the control signal is not transmitted at the one or more frequency bands for any of the all terminals, wherein the control signal comprises the control information to manage wireless data transmission by the all terminals being utilized instead of any control signal at the one or more frequency bands that is configured to manage the wireless data transmission by any of the all terminals at the one or more frequency bands, and based on the time synchronization by the control signal at the prime frequency band and the control information at the prime frequency band configured to manage the wireless data transmission by the all terminals, the wireless data transmission by the all terminals at the one or more frequency bands and the wireless data transmission by the all terminals at the prime frequency band can be time-synchronized and simultaneously carried out.

6. A wireless communication method for carrying out wireless data communication by use of a prime frequency band, the wireless communication method comprising:

employing a CSMA/CA and/or TDMA/TDD system as a wireless access system of a wireless communication system;

receiving, at a terminal, a periodically-broadcasted control signal where the prime frequency band is set for the terminal wirelessly connected to a base station with the periodically-broadcasted control signal at the prime frequency band only by the base station to indicate the prime frequency band for the terminal, wherein the control signal comprises a control information configured to manage wireless data transmission by the terminal;

using, in addition to the prime frequency band, one or more frequency bands different from the prime frequency band for the wireless data transmission by the terminal, wherein the control signal at the prime frequency band indicates the location of the one or more frequency bands which is allocated by the base station; and

scanning the control signal of the base station on the prime frequency band by the all terminals to make a time synchronization between the base station and the all terminals by the control signal, wherein the time synchronization is maintained by subsequent control signals at the prime frequency band transmitted from the base station periodically and received by each of the all terminals;

wherein the control signal is not transmitted at the one or more frequency bands for the terminal, wherein the terminal utilizes the control signal that comprises the control information at the prime frequency band instead of any control signal at the one or more frequency bands that is configured to manage the wireless data transmission by the terminal at the one or more frequency bands, and wherein, based on the time synchronization of the wireless communication system by the control signal at the prime frequency band and the control information at the prime frequency band configured to manage the wireless data transmission by the terminal, the wireless data transmission by the terminal at the one or more frequency bands and the wireless data transmission by the terminal at the prime frequency band can be time-synchronized and simultaneously carried out.