US 7,548,752 B2 · Feedback to support restrictive reuse

Abstract

The scheduler in a base station needs CQI information from a terminal for all reuse sets every 5 ms. to decide on which re-use set to schedule a given terminal. For MIMO users, the problem is that the CQI cannot be reconstructed for all re-use sets, using the current design. Solution: (1) For Multiple Code Word MIMO users, a MIMO VCQI connection layer message enables the base station to reconstruct the MIMO-CQI for all reuse sets on a packet-by-packet basis. This will enable dynamic scheduling (RESTRICTIVE REUSE) gains. (2) For Single Code Word users, dynamic RESTRICTIVE REUSE can be obtained by changing the CQI reporting format, and also sending a MIMO-VCQI connection layer message. (3) For Single Code Word design, quasi-static scheduling gains can be obtained by sending a MIMO-VCQI connection layer message.

Claims14

Dependent claims

A method of providing feedback to support restrictive reuse in a single code word (SCW) multiple-input multiple-output (MIMO) system, comprising:

sending a quality indicator for a non-restrictive reuse set to a scheduler, wherein the quality indicator is based at least in part upon a direct measurement;
sending a vectored quality indicator for all reuse sets other than the non-restrictive reuse set for all layers to a scheduler, wherein the vectored quality indicator is based at least in part upon a direct measurement;
and
scheduling a terminal in a reuse set based in part on at least one of the quality indicator or the vectored quality indicator,
wherein the quality indicator includes two bits for rank and six bits for said quality indicator (CQI) for the non-restrictive reuse set.

2 more elements

Dependencies are inferred from the claim text.

Feedback to support restrictive reuse

Life of this patent

Feedback to support restrictive reuse

Life of this patent

Abstract

Claims14