Multi-Cell Incremental Redundancy
AssigneeBroadcom Corporation
InventorsLouay Jalloul, Djordje Tujkovic, Ahmad Mohammed
Life of this patent
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Abstract
Embodiments enable cooperative transmissions from a group of cells (can include the serving cell and one or more neighboring cells) to a user equipment (UE). The cooperative transmissions emulate Hybrid Automatic Repeat Request (HARQ) transmissions to the UE. Specifically, when the UE is experiencing high interference, the UE's serving cell can create a transmit incremental redundancy (IR) group for the UE, which is used to transmit information in a HARQ-like fashion to the UE. Because interference is reduced, the UE can decode the information at a lower coding rate and higher coding gain.
Claims24
A method for transmitting a data block from a group of cells to a user equipment (UE), comprising:
- creating a transmit incremental redundancy (IR) group for the UE, wherein the transmit IR group includes a primary cell and a secondary cell;
- and
- transmitting first and second portions of the data block from the primary cell and the secondary cell respectively to the UE, wherein the first and second portions include different portions of the data block.
A method for processing transmissions from a group of cells to a user equipment (UE), comprising:
- receiving, by the UE, first and second transmissions from a transmit incremental redundancy (IR) group, wherein the first and second transmissions include respectively first and second portions of a data block, and wherein the first and second portions are selected respectively based on first and second redundancy version (RV) indices;
- generating combined soft bits from the first and second transmissions based on the first and second RV indices;
- and
- generating a bit sequence using the combined soft bits.
A receiver, comprising:
- first and second receive antennas configured to receive first and second transmissions from a transmit incremental redundancy (IR) group, wherein the first and second transmissions include respectively first and second portions of a data block, and wherein the first and second portions are selected respectively based on first and second redundancy version (RV) indices;
- a soft-output demapper configured to generate combined soft bits from the first and second transmissions based on the first and second RV indices;
- and
- a decoder configured to generate a bit sequence using the combined soft bits.
A method for transmitting a data block from a group of cells to a user equipment (UE), comprising:
- creating a transmit incremental redundancy (IR) group for the UE, wherein the transmit IR group includes a primary cell and a secondary cell;
- and
- transmitting a same portion of the data block from the primary cell and the secondary cell respectively to the UE, wherein the same portion of the data block is transmitted on a same carrier frequency and different physical resource blocks (PRBs) or on different carrier frequencies from the primary and secondary cells respectively to the UE.
Dependencies are inferred from the claim text.