Back to results
US 6,272,335 B1Granted
Wireless access system
AssigneeNippon Telegraph and Telephone Corporation
InventorsYuji Nakayama, Masahiko Itoh, Satoshi Kurosaki, Satoru Aikawa
Life of this patent
Estimating the term…
Abstract
In a wireless access system which uses the sector antenna of a radio base station to transmit an access channel to and receive an access channel from a radio terminal in each frame, and which switches the sector at each frame, the sector ID s is set in a specific functional relation to the access channel ID a, and a radio terminal which communicates with a radio base station transmits and receives in accordance with the access channel ID a without knowing the sector ID s.
Claims13
A radio channel control method comprising:
- providing a predetermined number of antenna elements at a radio base station to transmit and receive an access channel to and from a radio terminal in each frame of information, wherein predetermined number of antenna elements are more than one;
- switching said antenna elements at each said frame;
- and
- setting an antenna element ID in a specific functional relation to an access channel ID;
- wherein the radio terminal which communicates with the radio base station transmits and receives in accordance with the access channel ID without the antenna element ID via the same antenna element for each access channel ID.
2 more elements
A wireless access system comprising:
- a radio terminal;
- and
- a radio base station which is connectable to said radio terminal by time division multiple access (TDMA), said radio base station including:
- a predetermined number of antenna elements, wherein predetermined number of antenna elements are more than one;
- means for transmitting and receiving an access channel in each frame of information;
- and
- means for letting the access channel ID be a and the antenna element ID be s, and setting:
- s=f(a)
- where f indicates a specific functional relation for each one of said predetermined number of antenna elements;
- wherein the radio terminal comprises a means for communicating with said radio base station in accordance with said access channel ID a and said radio station transmitting and receiving via one of the antenna elements for each said access channel ID a.
7 more elements
Dependencies are inferred from the claim text.