Base station transceiver sub-system and frame offset allocation method thereof
First Claim
1. A base station transceiver sub-system which transmits/receives data to/from a mobile station via radio, and transmits/receives data in cells to/from a base station controller via a transmission line, comprising:
- an offset allocation block which allocates to each traffic channel one of a plurality of frame offsets generated by dividing a predetermined time length when data is transmitted via radio in said predetermined time length frame units;
a radio interface which transmits frames of a predetermined traffic channel at timing according to the frame offset allocated to said traffic channel;
a transmission line interface which assembles cells using frame of each traffic channel and transmits/receives the cells to/from the base station controller via the transmission line at timing according to the frame offset allocated to said traffic channel; and
a fluctuation tolerance block which tolerates the fluctuation of a cell on the transmission line for a predetermined frame offset width, wherein said offset allocation block allocates a same frame offset to a plurality of traffic channels considering the data transmission band determined by said tolerated fluctuation width.
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Abstract
The invention disclosed herein relates to a base station transceiver sub-system, where when data is transmitted/received via radio in predetermined time long frame units, one frame offset of a plurality of frame offsets after dividing the time length is allocated to each traffic channel, and the radio interface 50 and the ATM interface are synchronized using this frame offset. In this base station transceiver sub-system, the fluctuation of cells on an ATM line is tolerated for a predetermined frame offset width, and considering the cell transmission enabled band according to said tolerated fluctuation width, a same frame offset is allocated to a plurality of traffic channels so as to control the generation of fragmentation.
22 Citations
12 Claims
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1. A base station transceiver sub-system which transmits/receives data to/from a mobile station via radio, and transmits/receives data in cells to/from a base station controller via a transmission line, comprising:
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an offset allocation block which allocates to each traffic channel one of a plurality of frame offsets generated by dividing a predetermined time length when data is transmitted via radio in said predetermined time length frame units;
a radio interface which transmits frames of a predetermined traffic channel at timing according to the frame offset allocated to said traffic channel;
a transmission line interface which assembles cells using frame of each traffic channel and transmits/receives the cells to/from the base station controller via the transmission line at timing according to the frame offset allocated to said traffic channel; and
a fluctuation tolerance block which tolerates the fluctuation of a cell on the transmission line for a predetermined frame offset width, wherein said offset allocation block allocates a same frame offset to a plurality of traffic channels considering the data transmission band determined by said tolerated fluctuation width. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A frame offset allocation method for a base station transceiver sub-system, comprising an offset allocation block which allocates, to each traffic channel, one frame offset of N number of frame offsets generated by dividing a predetermined time length T when data is transmitted/received via radio in said predetermined time length frame unit;
- a radio interface which transmits traffic data at a timing according to the frame offset allocated to said traffic channel when a frame of a predetermined traffic channel is transmitted via radio; and
a transmission line interface block which assembles cells using the traffic data of each traffic channel, and transmits/receives the cells to/from the base station controller via the transmission line at timing according to the frame offset allocated to said traffic channel,wherein said frame offset allocation method comprises the steps of;
tolerating the phase fluctuation of cells on the transmission line for the M frame offset width; and
allocating a same frame offset to a plurality of traffic channels considering the data transmission band determined by said tolerated phase fluctuation width. - View Dependent Claims (9, 10, 11, 12)
- a radio interface which transmits traffic data at a timing according to the frame offset allocated to said traffic channel when a frame of a predetermined traffic channel is transmitted via radio; and
Specification