Allocation and logical to physical mapping of scheduling request indicator channel in wireless networks
A method for allocating resources for a scheduling request indicator (SRI) is disclosed. An SRI cycle period for use by user equipment (UE) within a cell is transmitted from a NodeB in a cell to UE within the cell. The NodeB transmits a specific SRI subframe offset and an index value to the particular UE within the cell. The specific SRI subframe offset and the index value enable the UE to determine a unique combination of cyclic shift, RS orthogonal cover, data orthogonal cover, and resource block number for the UE to use as a unique physical resource for an SRI in the physical uplink control channel (PUCCH).
1. A method of transmitting a scheduling request indicator (SRI) comprising:
receiving an SRI configuration index I SR from a user equipment (UE) for use by a base station within a cell;
determining an SRI periodicity SRI periodicity and a SRI subframe offset SRI subframe offset from the SRI configuration index ISR for use by user equipment (UE)within a cell;
transmitting the SRI periodicity SRI periodicity and the SRI subframe offset SRlsubframe for use by user equipment (UE) within a cell;
wherein the SRI is transmitted on a two-state SR channel.
2. The method of claim 1 wherein the SRI configuration index I SR is transmitted in level three (L3) signaling in media access control (MAC) protocol data unit (PDU) on a physical downlink shared channel (PDSCH).
3. A device for transmitting a scheduling request indicator (SRI) comprising:
a processor operable to execute instructions, coupled to a memory containing instructions for the processor;
a radio receiver and a transmitter coupled to the processor;
wherein the receiver is operable to: receive an SRI configuration index I SR from a user equipment (UE) to a node;
wherein the processor is operable to:
determinine a SRI periodicity SRI periodicity and a SRI subframe offset SRI subframe offset from the SRI configuration index I SR ;
wherein the transmitter is operable to:
transmit the SRI periodicity SRI periodicity and the SRI subframe offset SRI subframe ;
wherein the SRI is transmitted on a two-state SR channel.
4. The device of claim 3 wherein the SRI configuration index ISR is transmitted in level three (L3) signaling in media access control (MAC) protocol data unit (PDU) on a physical downlink shared channel (PDSCH).