US 6,747,963 B1 · Apparatus and method for gated transmission in a CDMA communication system

Abstract

A method and device for gating the transmission of dedicated control channels in a CDMA communication system is disclosed. In the device and method, if a base station (mobile station) determines whether there is no data to transmit to a mobile station (base station) for predetermined period of time, the base station (mobile station) gates transmission of control information according to a predetermined pattern on a dedicated control channel, which channel is used for transmitting control information to the mobile station (base station). Control information transmitted from the base station to the mobile station includes Transport Format Combination Indicator (TFCI), Transmit Power Control (TPC), and a pilot symbol. Control information transmitted from the mobile station to the base station includes TFCI, TPC, a pilot symbol, and FeedBack Information (FBI) for information about a transmit diversity antenna system. In a downlink DPCCH, transmission of the TFCI, TPC and pilot symbol is transmitted discontinuously at every predetermined nth slot out of the total slots of a frame during gated transmission. Alternatively, transmission of the pilot symbol can be transmitted discontinuously at every predetermined nth slot and the TFCI and the TPC at every (n+1)th slot. In an uplink DPCCH, the TFCI, TPC, FBI and pilot symbol are transmitted discontinuously at a specific slot during gated transmission. In addition, the TPC for power control can be continuously transmitted for full rate power control when there is traffic data for transmission.

Claims26

Dependent claims

A method for transmitting downlink signals in a base station which communicates with a base station that asynchronously operates with other base stations, the down link signals including a data transmission channel signal and a physical control signal which have control data related to connection or release of the data transmission channel and the physical control signal, correspond to the data transmission channel when there is data to transmit on the data transmission channel for a mobile communication system, comprising the steps of:

determining whether the base station has downlink data to transmit to the mobile station on the data transmission channel;
and
gating transmission of the physical control signal according to a predetermined gated on or off pattern when there is no data to transmit on the data transmission channel for a predetermined period of time.

A method for transmitting control information in a mobile communication system, comprising the steps of:

(a) determining whether a base station has data to transmit to a mobile station;
(b) transmitting a gating request message indicating a first gating start time and a first gating pattern to a mobile station when there has been no data to transmit for a predetermined period of time;
(c) gating, when the base station has received a gating request message and the first gating start time has been reached, transmission of first control information according to the first gating pattern within a frame on a downlink dedicated control channel, said downlink dedicated control channel being used for transmitting the first control information to the mobile station;
(d) determining whether the mobile station has data to transmit to the base station;
(e) transmitting a gating request message indicating a second gating start time and a second gating pattern to the base station when there has been no data to transmit for a predetermined period of time;
(f) gating, when the mobile station has received a gating request message from the base station and the second gating start time has been reached, transmission of second control information according to the second gating pattern within a frame on an uplink dedicated control channel, said uplink dedicated control channel being used for transmitting the second control information to the base station.

3 more elements

Dependencies are inferred from the claim text.

Apparatus and method for gated transmission in a CDMA communication system

Life of this patent

Apparatus and method for gated transmission in a CDMA communication system

Life of this patent

Abstract

Claims26