US 8,797,954 B2Granted

Efficient signaling of discontinuous transmission

AssigneeBlackBerry Limited

InventorsMichael Eoin Buckley, Youn Hyoung Heo, Andrew Mark Earnshaw, Amin Mobasher, Masoud Ebrahimi Tazeh Mahalleh

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Abstract

Methods and devices are disclosed for efficient signaling of discontinuous transmission in a wireless communication system. In various aspects of the disclosure, a user equipment device monitors transmissions on a plurality of physical downlink control channels (PDCCHs) and, in response to said transmissions, generates an acknowledge/negative acknowledge (ACK/NACK) signal comprising a plurality of bits, wherein the plurality of bits includes a discontinuous transmission (DTX) indicator bit. In some embodiments, the indicator bit corresponds to an even or odd number of PDCCHs successfully decoded. In other embodiments, the indicator bit corresponds to an odd or even number of component carriers comprising “TRUE” NACKs.

Claims2

Dependent claims

A method for operating a user equipment in a wireless communication network, the method comprising:

monitoring, by the user equipment, transmissions on a plurality of physical downlink control channels (PDCCHs);
and
in response to said transmissions, generating, by the user equipment, an acknowledge/negative acknowledge (ACK/NACK) signal comprising a plurality of bits, wherein the plurality of bits includes a discontinuous transmission (DTX) indicator bit;
wherein the DTX indicator bit corresponds to one of:
(a) an odd or even total number of NACKs corresponding to PDSCH coding failures but not including any NACKs corresponding to failure to successfully decode a PDCCH;
(b) an odd or even number of component carriers where all of the HARQ feedback bits for a component carrier consists of NACKs corresponding to a PDSCH decoding failure;
(c) an odd or even number of HARQ feedback bits corresponding to the decoding failure of the associated data codeword;
(d) an odd or even number of PDCCHs successfully decoded, if the number of NACKs is less than or equal to a threshold, and whether or not at least one NACK corresponds to failure to successfully decode a PDCCH otherwise;
(e) a bit to be combined with additional (log2(M-1))-1 bits, wherein M is the number of component carriers, and wherein the combination of bits indicates a number of component carriers for which a PDCCH was not successfully decoded.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/246,477Filed 27 Sep 2011 · us provisional application
Priority: 28 Sep 2010
Published: US 2012/0076077 A129 Mar 2012
Granted: 5 Aug 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H04W 76/28
Manipulation of established connections: discontinuous transmission [DTX]; Discontinuous reception [DRX]
H04L 1/1607
In which the return channel carries supervisory signals, e.g. repetition request signals: details of the supervisory signal
H04L 5/0053
Arrangements for allocating sub-channels of the transmission path: allocation of signalling, i.e. of overhead other than pilot signals
H04L 5/0055
Allocation of signalling, i.e. of overhead other than pilot signals: physical resource allocation for ACK/NACK