Cell selecting system and method thereof in radio communication network
First Claim
Patent Images
1. A cell selecting system in a radio communication network, the system comprising:
- at least one device which broadcasts a forward broadcast control channel (BCCH); and
a mobile terminal which accesses any one of time slots of a pertinent frame of the forward BCCH to demodulate certain data bit patterns, each time slot of the pertinent frame of the forward BCCH including both a frequency correction channel (FCCH) bit pattern and a synchronization channel (SCH) bit pattern therein.
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Abstract
In a cell selecting system and a method thereof in a radio communication network, a forward BCCH is constructed to contain, in each time slot of a frame, both a FCCH bit pattern and a SCH bit pattern. The method includes measuring the reception power of a forward BCCH transmitted from each cell, while detecting a FCCH bit pattern and a SCH bit pattern from a time slot of the forward BCCH and demodulating the detected bit patterns. The cell synchronization can be performed by using the demodulated information of the selected cell. Accordingly, the cell selection time and the processing load of the mobile terminal can be reduced.
8 Citations
20 Claims
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1. A cell selecting system in a radio communication network, the system comprising:
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at least one device which broadcasts a forward broadcast control channel (BCCH); and a mobile terminal which accesses any one of time slots of a pertinent frame of the forward BCCH to demodulate certain data bit patterns, each time slot of the pertinent frame of the forward BCCH including both a frequency correction channel (FCCH) bit pattern and a synchronization channel (SCH) bit pattern therein. - View Dependent Claims (2, 3)
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- 4. A mobile terminal which accesses any one of time slots of a pertinent frame of a forward broadcast control channel (BCCH) to demodulate certain data bit patterns, each time slot of the pertinent frame of the forward BCCH including both a frequency correction channel (FCCH) bit pattern and a synchronization channel (SCH) bit pattern therein.
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6. A forward channel demodulation method of a cell selecting system in a packet-based radio communication network, the method comprising:
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monitoring a forward channel; and measuring a reception power level of the forward channel and demodulating certain bit patterns contained in the forward channel, wherein the demodulating step includes accessing one time slot of a frame of the forward channel, the one time slot including both a frequency correction channel (FCCH) bit pattern and a synchronization channel (SCH) bit pattern. - View Dependent Claims (7, 8, 9)
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10. A cell selecting method usable in a radio communication network, the method comprising:
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receiving a forward channel from each cell; measuring a reception power of the received forward channel while accessing and demodulating data bits that include a frequency correction channel (FCCH) bit pattern and a synchronization channel (SCH) bits from the forward channel of a pertinent cell, wherein the forward channel includes a forward broadcast control channel (BCCH) and each time slot of a frame of the forward BCCH contains therein the FCCH bit pattern and the SCH bit pattern; and selecting a cell having the greatest power reception based on the measured reception power and performing a cell synchronization with the selected cell on the basis of the demodulated data bits. - View Dependent Claims (11, 12)
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13. A method of obtaining at least one of a frequency correction channel (FCCH) bit pattern and a synchronization channel (SCH) bit pattern from a control channel, the method comprising:
accessing any one of time slots of a certain frame of the control channel and thereby obtaining said at least one of the FCCH and SCH bit patterns, wherein both the FCCH and SCH bit patterns are obtained by accessing any one of the time slots.
- 14. A forward channel data structure embodied in a computer-readable medium and usable in a radio communication network, the data structure comprising at least one frame having a plurality of time slots per frame, each of the time slots having therein both a frequency correction channel (FCCH) bit pattern used in frequency correction and a synchronization channel (SCH) bit pattern used in synchronization.
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19. A mobile terminal which receives a broadcast control channel (BCCH) from at least one cell, and accesses and processes one time slot of a frame of the BCCH, wherein the one time slot includes both a frequency correction channel (FCCH) bit pattern and a synchronization channel (SCH) bit pattern.
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20. A cell selecting method usable in a radio communication network, the method comprising:
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receiving a broadcast control channel (BCCH) from at least one cell; and accessing and processing one time slot of a frame of the BCCH, wherein the one time slot includes both a frequency correction channel (FCCH) bit pattern and a synchronization channel (SCH) bit pattern.
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Specification