Turbo hsdpa system

Abstract

A method of power saving for a wireless transceiver (FIGS. 1 and 2) is disclosed. The transceiver has an active power mode (504) and a reduced power mode (510). The transceiver is operated in the reduced power mode (510) and monitors transmissions from a remote wireless transmitter while in the reduced power mode. The transceiver identifies a transmission from the remote wireless transmitter by a transceiver identity included in the transmission (FIG. 6, UE identification). The transceiver transitions to the active power mode (512) in response to identifying the transmission.

What is claimed is: 
     
         1 . A method of power saving in a transceiver during a time interval, the time interval having a plurality of signals, comprising the steps of:
 receiving a first signal of the plurality of signals in an active power mode;   determining if there are other signals of the plurality of signals for the transceiver in response to the first signal;   operating the transceiver in the active power mode when there are other signals of the plurality of signals for the transceiver; and   operating the transceiver in a reduced power mode when there are no other signals of the plurality of signals for the transceiver.   
     
     
         2 . A method as in  claim 1 , wherein the first signal is transmitted from a remote transmitter in a shared control channel. 
     
     
         3 . A method as in  claim 1 , wherein the plurality of signals comprises at least three orthogonal frequency division multiplex (OFDM) symbols, and wherein the first signal is included in one of a first and second OFDM symbols in time. 
     
     
         4 . A method as in  claim 3 , wherein the first signal comprises an identity of the transceiver. 
     
     
         5 . A method of transmitting symbols, comprising the steps of:
 forming a plurality of symbols in a packet;   forming pilot and control signals in a first symbol of the plurality of symbols;   excluding pilot signals from at least another symbol of the plurality of symbols; and   transmitting the packet.   
     
     
         6 . A method as in  claim 5 , comprising the step of forming pilot and control signals in a second symbol of the plurality of symbols, wherein the second symbol is adjacent in time to the first symbol. 
     
     
         7 . A method as in  claim 5 , wherein the step of transmitting comprises transmitting the packet during a transmit time interval (TTI). 
     
     
         8 . A method as in  claim 5 , wherein each symbol of the plurality of symbols is an orthogonal frequency division multiplex (OFDM) symbol. 
     
     
         9 . A method as in  claim 5 , wherein a transmit power for the pilot signals is greater than a transmit power for the control signals. 
     
     
         10 . A method of transmitting an orthogonal frequency division multiplex (OFDM) signal, comprising the steps of:
 transmitting on a plurality of control channels during a transmit time interval; and   transmitting a counter during the transmit time interval to indicate a number of the plurality of control channels in the transmit time interval.   
     
     
         11 . A method as in  claim 10 , wherein each control channel corresponds to a respective user in a wireless cell. 
     
     
         12 . A method as in  claim 10 , wherein the counter value specifies a number of the plurality of control channels with a specific coding and modulation scheme. 
     
     
         13 . A method of transmitting an orthogonal frequency division multiplex (OFDM) signal during a transmit time interval (TTI), comprising the steps of:
 transmitting a plurality of control channels during a transmit time interval, each control channel corresponding to a respective user; and   transmitting a counter associated with each respective control channel to indicate a size of said each respective control channel of the plurality of control channels.   
     
     
         14 . A method as in  claim 13 , wherein the size of said each respective control channel is variable. 
     
     
         15 . A method of transmitting a broadcast orthogonal frequency division multiplex (OFDM) signal, comprising the steps of:
 determining a plurality of broadcast channels;   transmitting on a set of broadcast channels within the plurality of broadcast channels during a transmit time interval (TTI); and   transmitting a broadcast channel bitmap to indicate the set of broadcast channels are active during the transmit time interval.   
     
     
         16 . A method as in  claim 15 , wherein a number of the set of broadcast channels is less than a number of the plurality of broadcast channels. 
     
     
         17 . A method as in  claim 15 , wherein broadcast channels of the plurality of broadcast channels other than the set of broadcast channels are inactive during the transmit time interval. 
     
     
         18 . A method for power saving during a communications session in which packet transmission is scheduled at predetermined time intervals, comprising the steps of:
 operating a transceiver having an active power mode and a reduced power mode;   operating the transceiver in the active power mode at the predetermined time intervals of the communications session; and   operating the transceiver in the reduced power mode during remaining time intervals of the communications session.   
     
     
         19 . A method as in  claim 18 , wherein the transceiver sends a remote wireless transmitter an acknowledge (ACK) signal from the active power mode. 
     
     
         20 . A method as in  claim 18 , wherein the transceiver returns to the reduced power mode at a first time after receiving a most recent transmission from the remote wireless transmitter. 
     
     
         21 . A method as in  claim 20 , wherein the transceiver has a second reduced power mode, comprising the step of operating in the second reduced power mode at an end of the communication session. 
     
     
         22 . A method as in  claim 18 , wherein the transceiver determines the predetermined time intervals in response to information in a shared control channel. 
     
     
         23 . A method as in  claim 18 , wherein the transceiver determines the predetermined time intervals in response to information in a common control channel. 
     
     
         24 . A method of transmitting a control channel, comprising the steps of:
 transmitting a first part of the control channel that is encoded; and   transmitting a second part of the control channel that is encoded differently than the first part.   
     
     
         25 . A method as in  claim 24 , wherein the control channel is an orthogonal frequency division multiplex (OFDM) control channel. 
     
     
         26 . A method as in  claim 24 , wherein the first part is a common part comprising user equipment (UE) identities, and wherein the second part is a UE dedicated part.