Radio base device, mobile terminal device, reference signal control method, and reference signal control program
First Claim
1. A radio cell station apparatus to which a plurality of personal stations can establish space division multiple access, comprising:
- a transmitting and receiving unit for transmitting to and receiving from each of the personal stations a signal including a reference signal, which is a signal train consisting of a plurality of bits, and used for a synchronization process of a reception signal from each of the personal stations;
a reference signal defining unit for defining one or more reference signals optimized for each multiplexed connection number of the personal stations establishing said space division multiple access to said radio cell station apparatus;
a multiplexed connection number detection unit for detecting a number of multiplexed connections of the personal stations establishing space division multiple access during communication; and
a reference signal allocation unit for;
switching the reference signals that have been allocated to the personal stations establishing space division multiple access respectively prior to a change in the number of multiplexed connections to reference signals for maintaining communication quality even after the number of multiplexed connections is changed, andallocating the switched reference signals to said plurality of personal stations respectively, when the change in the number of multiplexed connections is detected during communication in said multiplexed connection number detection unit.
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Accused Products
Abstract
When the number of multiplexed connections of PSs to a CS is changed due to issuance of a connection request from other PS to the CS or the like, the CS selects a unique word pattern (new unique word) optimal for the new number of multiplexed connections, so as to request switching from an old unique word to a new unique word to each PS of the user who has established multiple access. When a response to the request for switching is received from the PS of each user, the CS transmits a synchronous burst signal including the new unique word to the PS, and the PS also returns the synchronous burst signal including the new unique word. Synchronization is thus established.
28 Citations
24 Claims
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1. A radio cell station apparatus to which a plurality of personal stations can establish space division multiple access, comprising:
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a transmitting and receiving unit for transmitting to and receiving from each of the personal stations a signal including a reference signal, which is a signal train consisting of a plurality of bits, and used for a synchronization process of a reception signal from each of the personal stations; a reference signal defining unit for defining one or more reference signals optimized for each multiplexed connection number of the personal stations establishing said space division multiple access to said radio cell station apparatus; a multiplexed connection number detection unit for detecting a number of multiplexed connections of the personal stations establishing space division multiple access during communication; and a reference signal allocation unit for; switching the reference signals that have been allocated to the personal stations establishing space division multiple access respectively prior to a change in the number of multiplexed connections to reference signals for maintaining communication quality even after the number of multiplexed connections is changed, and allocating the switched reference signals to said plurality of personal stations respectively, when the change in the number of multiplexed connections is detected during communication in said multiplexed connection number detection unit. - View Dependent Claims (2, 3, 19)
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4. A personal station establishing space division multiple access to a radio cell station apparatus, comprising:
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a transmitting and receiving unit for transmitting to and receiving from said radio cell station apparatus a signal including a reference signal, which is a signal train consisting of a plurality of bits, used for a synchronization process of a reception signal from each of said personal stations, defined in said radio cell station apparatus and optimized for each multiplexed connection number of the personal stations establishing said space division multiple access to said radio cell station apparatus; a receiving unit for receiving a request for switching a reference signal from said radio cell station apparatus in accordance with a change in the number of multiplexed connections of the personal stations establishing space division multiple access during communication; and a switching unit for switching the reference signal to a reference signal for maintaining communication quality even after the number of multiplexed connections is changed and transmitting a response to the request for switching to said radio cell station apparatus. - View Dependent Claims (5, 6, 20)
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7. A method of controlling a reference signal performed by a radio cell station apparatus to which a plurality of personal stations can establish space division multiple access, comprising the steps of:
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transmitting to and receiving from each of the personal stations a communication signal including a reference signal, which is a signal train consisting of a plurality of bits, and used for a synchronization process of a reception signal from each of the personal stations; defining one or more reference signals optimized for each multiplexed connection number of the personal stations establishing said space division multiple access to said radio cell station apparatus; detecting a number of multiplexed connections of the personal stations establishing space division multiple access during communication; and when a change in the number of multiplexed connections is detected in said step of detecting the number of multiplexed connections, switching the reference signals that have been allocated to the personal stations establishing space division multiple access respectively prior to change in the number of multiplexed connections to reference signals for maintaining communication quality even after the number of multiplexed connections is changed, and allocating the reference signals to said plurality of personal stations respectively. - View Dependent Claims (8, 9, 21)
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10. A method of controlling a reference signal performed by a personal station establishing space division multiple access to a radio cell station apparatus, comprising the steps of:
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transmitting to and receiving from said radio cell station apparatus a communication signal including a reference signal, which is a signal train consisting of a plurality of bits, used for a synchronization process of a reception signal from each of said personal stations, defined in said radio cell station apparatus and optimized for each multiplexed connection number of the personal stations establishing said space division multiple access to said radio cell station apparatus; receiving a request for switching a reference signal from said radio cell station apparatus in accordance with change in the number of multiplexed connections of the personal stations establishing space division multiple access during communication; and switching the reference signal to a reference signal for maintaining communication quality even after the number of multiplexed connections is changed and transmitting a response to the request for switching to said radio cell station apparatus. - View Dependent Claims (11, 12, 22)
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13. A computer program embodied in a computer readable medium, for controlling a reference signal performed by a radio cell station apparatus to which a plurality of personal stations can establish space division multiple access, causing a computer to execute the steps of:
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transmitting to and receiving from each of the personal stations a communication signal including a reference signal, which is a signal train consisting of a plurality of bits, and used for a synchronization srocess of a reception signal from each of the personal stations; defining one or more reference signals optimized for each multiplexed connection number of the personal stations establishing said space division multiple access to said radio cell station apparatus; detecting a number of multiplexed connections of the personal stations establishing space division multiple access during communication; and when a change in the number of multiplexed connections is detected in said step of detecting the number of multiplexed connections, switching the reference signals that have been allocated to the personal stations establishing space division multiple access respectively prior to change in the number of multiplexed connections to reference signals for maintaining communication quality even after the number of multiplexed connections is changed, and allocating the reference signals to said plurality of personal stations respectively. - View Dependent Claims (14, 15, 23)
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16. A computer program embodied in a computer readable medium, for controlling a reference signal performed by a personal station establishing space division multiple access to a radio cell station apparatus, causing a computer to execute the steps of:
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transmitting to and receiving from said radio cell station apparatus a communication signal including a reference signal, which is a signal train consisting of a plurality of bits, used for a synchronization process of a reception signal from each of said personal stations, defined in said radio cell station apparatus and optimized for each multiplexed connection number of the personal stations establishing said space division multiple access to said radio cell station apparatus; receiving a request for switching a reference signal from said radio cell station apparatus in accordance with change in the number of multiplexed connections of the personal stations establishing space division multiple access during communication; and switching the reference signal to a reference signal for maintaining communication quality even after the number of multiplexed connections is changed and transmitting a response to the request for switching to said radio cell station apparatus. - View Dependent Claims (17, 18, 24)
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Specification