Radio Communication System
First Claim
1. A wireless communication system for performing communication between a base station and a plurality of terminal stations by using a contention method to assign a different slot in response to a transmission request from each of the terminal stations,the base station comprising:
- a plurality of antennas disposed such that a plurality of wireless zones cover mutually different areas;
a plurality of wireless units connected to the plurality of antennas in one-to-one correspondence, and being operable to, via the respective antennas, receive wireless signals from the terminal stations in the wireless zones, and transmit wireless signals to the terminal stations in the wireless zones;
a data processing unit operable to process the wireless signals received by the plurality of wireless units, as well as generate data to be transmitted to the plurality of terminal stations; and
a communication control unit operable to control the plurality of wireless units so as to, during a slot other than a transmission request slot, form one communication area combining the wireless zones of all of the antennas, and during the transmission request slot, form a plurality of mutually independent communication areas less than or equal in number to the plurality of antennas.
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Accused Products
Abstract
In a wireless communication system using the contention method, collisions between transmission signals sent from terminals to a base station are avoided, and a communication area is flexibly formed while suppressing unnecessary radiation of the communication area. The base station includes antennas disposed such that wireless zones cover mutually different areas, wireless units connected to the antennas in one-to-one correspondence, and for, via the respective antennas, receiving wireless signals from the terminal stations in the wireless zones and transmitting wireless signals to the terminal stations in the wireless zones, a data processing unit for processing the wireless signals received by the plurality of wireless units and generate data to be transmitted to the terminal stations, and a communication control unit for controlling the wireless units so as to, during a slot other than a transmission request slot, form one communication area combining the wireless zones of all of the antennas, and during the transmission request slot, form mutually independent communication areas less than or equal in number to the antennas.
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Citations
10 Claims
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1. A wireless communication system for performing communication between a base station and a plurality of terminal stations by using a contention method to assign a different slot in response to a transmission request from each of the terminal stations,
the base station comprising: -
a plurality of antennas disposed such that a plurality of wireless zones cover mutually different areas; a plurality of wireless units connected to the plurality of antennas in one-to-one correspondence, and being operable to, via the respective antennas, receive wireless signals from the terminal stations in the wireless zones, and transmit wireless signals to the terminal stations in the wireless zones; a data processing unit operable to process the wireless signals received by the plurality of wireless units, as well as generate data to be transmitted to the plurality of terminal stations; and a communication control unit operable to control the plurality of wireless units so as to, during a slot other than a transmission request slot, form one communication area combining the wireless zones of all of the antennas, and during the transmission request slot, form a plurality of mutually independent communication areas less than or equal in number to the plurality of antennas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A communication method in a wireless communication system for performing communication between a base station and a plurality of terminal stations by using a contention method to assign a different slot in response to a transmission request from each of the terminal stations,
the base station including: -
a plurality of antennas disposed such that a plurality of wireless zones cover mutually different areas; a plurality of wireless units connected to the plurality of antennas in one-to-one correspondence, and being operable to, via the respective antennas, receive wireless signals from the terminal stations in the wireless zones, and transmit wireless signals to the terminal stations in the wireless zones; a data processing unit operable to process the wireless signals received by the plurality of wireless units, as well as generate data to be transmitted to the plurality of terminal stations; and a control unit operable to control connections between the data processing unit and the plurality of wireless units, and switch between (i) an independent zone mode of causing the wireless zones of the antennas to be independent communication areas and (ii) a combined zone mode of forming a single communication area by combining all of the wireless zones, wherein in a transmission request slot, the independent zone mode is set, and transmission requests from the plurality of terminal stations are received concurrently, and in a slot other than the transmission request slot, the combined zone mode is set, and one of the plurality of terminal stations performs communication with use of the slot other than the transmission request slot.
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Specification