Downlink and uplink channel structures for downlink shared channel system
View Patent ↗An uplink and downlink channel structure supports a shared downlink data channel. The new structure accommodates advanced physical and Medium Access Control (MAC) layer techniques, such as incremental redundancy (IR), fast adaptation to channel conditions, and multiple input multiple output (MIMO) antenna configuration. The proposed changes are intended to lead to a downlink structure that achieves higher spectral efficiency for the packet oriented services over then shared downlink channel. Additionally, the new structure uses the base station transmit power information and of the channelization (OVSF) code space more efficiently.
1. A method comprising the steps of:
transmitting at a rate on a downlink shared channel having slots with each slot including a preamble locally identifying a wireless unit and data, wherein the downlink shared channel is associated with a dedicated downlink channel;
transmitting on a dedicated control channel, associated with the dedicated downlink channel, information including power control bits that implement uplink power control and pilot bits;
transmitting on a beacon channel a power fraction information, downlink activity information and code space information; and
receiving on an uplink dedicated physical control channel, rate information calculated using said power fraction information, said downlink activity information and said code space information for transmitting on said downlink shared channel, and an acknowledgement information indicating the receipt of said data.
2. A method comprising the steps of:
receiving at a rate on a downlink shared channel having slots with each slot including a preamble locally identifying a wireless data unit and data, wherein the download shared channel is associated with a dedicated downlink channel;
receiving on a dedicated control channel associated with the dedicated downlink channel, information including power control bits that implement uplink power control and pilot bits;
receiving on a beacon channel a power fraction information, downlink activity information and code space information; and
transmitting at a rate on an uplink dedicated physical control channels, rate information calculated using said power fraction information, said downlink activity information and said code space information and acknowledgment information indicating the receipt of said data.