Single carrier/ds-cdma packet transmission method, an uplink packet transmission method in a multi-carrier/ds-cdma mobile communications system, and a structure of a downlink channel in a multi-carrier/ds-cdma mobile communications system

Abstract

The present invention provides a single carrier/DS-CDMA packet transmission method wherein a predetermined time slot is assigned to reservation demand packet transmission in regard to a spreading code, and the reservation demand packet and data packets are time-multiplexed for transmission. An uplink packet transmission method in a multi-carrier/DS-CDMA mobile communication system is also provided, wherein frames are set up in each communication channel of a subcarrier, time slots which are time-segments of the frames are set up further, and a mobile station spreads a packet to be transmitted by a spreading code and the information signal is transmitted to a base station in a predetermined time slot. A downlink channel configuration in a multi-carrier/DS-CDMA mobile communication system is further provided, wherein a plurality of communication channels assigned to each of a plurality of subcarriers are divided for every predetermined time frame, and multiplexed, and the plurality of the communication channels assigned to each subcarrier include a common-control channel used by a plurality of users in common, and communication channels peculiar to each user.

1 . A downlink channel structure in a multi-carrier/DS-CDMA mobile communication system configured to expand a bandwidth of information symbols by a sequence of spreading codes and to transmit spreading information signal obtained by the bandwidth expansion by using a plurality of subcarriers having predetermined frequency intervals, wherein 
 a plurality of communication channels assigned to the respective subcarriers are divided into predetermined time frames and multiplexed, and    the plurality of communication channels assigned to the respective subcarriers are configured to include a common-control channel shared by a plurality of users and communication channels specific to the respective users.    
     
     
         2 . The downlink channel structure in the multi-carrier/DS-CDMA mobile communication system of  claim 1 , wherein the common-control channel includes information for controlling each user's uplink transmission.  
     
     
         3 . The downlink channel structure in the multi-carrier/DS-CDMA mobile communication system of  claim 1 , wherein the common control channel includes information about a response to each user's uplink transmission.  
     
     
         4 . The downlink channel structure in the multi-carrier/DS-CDMA mobile communication system of  claim 1 , wherein the common-control channel includes broadcast information commonly directed to each user.  
     
     
         5 . The downlink channel structure in the multi-carrier/DS-CDMA mobile communication system of  claim 1 , wherein the common-control channel includes a pilot symbol used for demodulating a received signal by each user.  
     
     
         6 . The downlink channel structure in the multi-carrier/DS-CDMA mobile communication system of  claim 1 , wherein the common-control channel is assigned to one or more code channels in part or all of the subcarriers.  
     
     
         7 . The downlink channel structure in the multi-carrier/DS-CDMA mobile communication system of  claim 1 , wherein the common control channel includes different kinds of information for different subcarriers  
     
     
         8 . The downlink channel structure in the multi-carrier/DS-CDMA mobile communication system of  claim 1 , wherein information included in the common control channel assigned to each subcarrier is time multiplexed to part of each time frame.  
     
     
         9 . The downlink channel structure in the multi-carrier/DS-CDMA mobile communication system of  claim 8 , wherein the information included in the common control channel assigned to each subcarrier is time multiplexed to an identical timing portion of each time frame of each subcarrier.  
     
     
         10 . The downlink channel structure in the multi-carrier/DS-CDMA mobile communication system of  claim 8 , wherein the information included in the common control channel assigned to each subcarrier is time-multiplexed to different timing portions of each time frame of each subcarrier.