Channelization code sharing between multiple users

摘要

A method of exchanging data in a communications network is provided. A control channel channelization code is assigned for transmitting user specific data channel allocation information to a particular mobile station (MS). The data channel allocation information indicates which part of the transmission time interval (TTI) available for data can be used by that particular MS. The control channel channelization code is shared in a TDMA fashion between the MSs during the TTI in a proportion equal to that in which the data channel channelization code is shared between the MSs such that each MS is allocated a share of the control channel channelization code in that part of the TTI. The control channel channelization code is then transmitted in a part of the TTI corresponding to that in which the data channel channelization code is transmitted for a particular MS.

主权项

1. A method comprising:
during downlink transmission, sharing a data channel channelization code on a high speed physical downlink shared channel (HS-PDSCH) between a group of mobile stations in a data communications network during a transmission time interval using time division multiple access (TDMA) such that each mobile station is allocated a share of the data channel channelization code in a time slot of the transmission time interval; sharing a control channel channelization code between the group of mobile stations on a high speed shared control channel (HS-SCCH) during the transmission time interval using TDMA in a proportion equal to that in which the data channel channelization code is shared between the mobile stations, wherein the control channel channelization code is used for transmitting user specific data channel allocation information; assigning a share of the control channel channelization code to a particular mobile station in the group in said time slot of the transmission time interval; indicating using the data channel allocation information which time slot of the transmission time interval available for data can be used by said particular mobile station in the group; transmitting the control channel channelization code in the same time slot of the transmission time interval as that in which the data channel channelization code is transmitted for said particular mobile station; during uplink transmission using an uplink code for uplink feedback from said particular mobile station in an uplink feedback time slot of the transmission time interval on a high speed dedicated physical control channel (HS-DPCCH), wherein the time slot of the transmission time interval on the HS-DPCCH corresponds to the time slot of the transmission time interval on the HS-PDSCH in which the data channel channelization code is transmitted for that particular mobile station; if no channel quality indicator is scheduled for any of the mobile stations in the group, carrying an ACK or NACK acknowledgment of a downlink transmission from a downlink time slot of the transmission time interval in a corresponding uplink time slot of the transmission time interval on the HS-DPCCH: and if a channel quality indicator is scheduled for at least one mobile station in the group, carrying a sum of ACK or NACK acknowledgments from the mobile stations in a first uplink time slot of the transmission time interval on the HS-DPCCH and carrying the channel quality indicator of each mobile station for which a channel quality indicator is scheduled in second and third uplink time slots of the transmission time interval.