Radio control apparatus and link securing method
First Claim
1. A radio control apparatus for achieving diversity handover in accordance with a request, which is sent from a mobile station in communication with a first base station by use of a first communication link, for diversity handover with a second base station, said radio control apparatus comprising:
- managing means for managing an information rate table in which information about information rates of communication links securable in the second base station is stored;
retrieving means for retrieving as a potential information rate a information rate not higher than an information rate of the first communication link, out of the information rates of the securable communication links from the information rate table on the occasion of receiving the request for diversity handover with the second base station from the mobile station;
instructing means for instructing the first base station to change the first communication link to a second communication link communicable at the potential information rate when the potential information rate thus retrieved is lower than the information rate of the first communication link; and
requesting means for requesting the second base station to perform communication with the mobile station by use of a third communication link communicable at the potential information rate.
1 Assignment
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Accused Products
Abstract
A radio control apparatus 10 is provided with a call management system 18 configured so that, when a mobile station in communication with a first base station by a first communication link requests diversity handover with a second base station, the call management system 18 retrieves a potential information rate that is not higher than an information rate of the first communication link and that is highest, from an information rate table 31 storing information about information rates of communication links securable in the second base station under other radio control apparatus; and a link management system 20 configured so that, when the potential information rate is lower than that of the first communication link, the link management system 20 instructs the first base station to change the first communication link to a second communication link communicable at the potential information rate; the call management system 18 requests the other radio control apparatus to secure a third communication link communicable at the potential information rate and to instruct the second base station to perform communication with the mobile station by the third communication link.
19 Citations
8 Claims
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1. A radio control apparatus for achieving diversity handover in accordance with a request, which is sent from a mobile station in communication with a first base station by use of a first communication link, for diversity handover with a second base station, said radio control apparatus comprising:
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managing means for managing an information rate table in which information about information rates of communication links securable in the second base station is stored;
retrieving means for retrieving as a potential information rate a information rate not higher than an information rate of the first communication link, out of the information rates of the securable communication links from the information rate table on the occasion of receiving the request for diversity handover with the second base station from the mobile station;
instructing means for instructing the first base station to change the first communication link to a second communication link communicable at the potential information rate when the potential information rate thus retrieved is lower than the information rate of the first communication link; and
requesting means for requesting the second base station to perform communication with the mobile station by use of a third communication link communicable at the potential information rate. - View Dependent Claims (2, 3, 4)
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5. A link securing method executed in a radio control apparatus for achieving diversity handover in accordance with a request, which is sent from a mobile station in communication with a first base station by use of a first communication link, for diversity handover with a second base station,
said radio control apparatus comprising an information rate table in which information about information rates of communication links securable at the second base station is stored, said link securing method comprising: -
a retrieving step of retrieving as a potential information rate a information rate not higher than an information rate of the first communication link, out of the information rates of the securable communication links from the information rate table on the occasion of receiving the request for diversity handover with the second base station from the mobile station;
an instructing step of instructing the first base station to change the first communication link to a second communication link communicable at the potential information rate when the potential information rate thus retrieved is lower than the information rate of the first communication link; and
a requesting step of requesting the second base station to perform communication with the mobile station by use of a third communication link communicable at the potential information rate. - View Dependent Claims (6, 7, 8)
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Specification