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Multi-carrier acknowledgment signaling

A multi-carrier and carrier technology, applied in the field of communication, can solve problems such as coverage impact, and achieve the effect of avoiding codebook ambiguity and enhancing Hamming distance.

Active Publication Date: 2017-03-01
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As mentioned above, the previous proposal with two separate ACK / NACK indications has severe coverage impact when transmitting two HS-DPCCHs

Method used

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  • Multi-carrier acknowledgment signaling
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Experimental program
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Embodiment Construction

[0062] As described herein above, existing schemes to support multi-carrier and / or multi-cell communications (eg, DC-HSDPA) have deficiencies. The first existing proposal would use two separate ACK / NACK indications. It will have severe coverage impact when transmitting two HS-DPCCHs. A second existing proposal would reuse the existing eight (8) MIMOACK / NACK / PRE / POST codewords already specified in 3GPP.

[0063] While reusing the existing eight MIMO codewords could jointly encode the two ACK / NACK indications, thereby avoiding the need for separate transmissions for dual-carrier ACK / NACK signaling, using this proposal brings a different set of drawbacks. For example, such a codebook formed from the existing eight MIMO codewords would have a minimum Hamming distance of only 3, which is much lower than the optimal minimum Hamming distance for a codebook of length 10 and size 8. Furthermore, since MIMO-derived codewords 7 and 8 (“NACK / ACK=[0010010010]” and “NACK / NACK=[0100100100]...

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Abstract

Acknowledgment signaling in a multi-carrier environment can be achieved by having a multi-carrier codebook with codewords jointly encoding acknowledgments for at least two carriers. For an example embodiment, there is a method in a remote terminal for acknowledging uplink signaling in multi-carrier mode. First, a codeword for jointly encoding the acknowledgment signaling for at least two carriers is determined from a multi-carrier codebook stored in the remote terminal. The multicarrier codebook includes eight codewords each having a length of 10 defined to have a single carrier codebook as a subcodebook of the multicarrier codebook. The multicarrier codebook achieves a minimum Hamming distance of 4 between eight codewords. Second, an uplink signaling message comprising the determined codeword is transmitted from the remote terminal to the radio network node.

Description

technical field [0001] The present invention relates generally to the field of communications, and more particularly, by way of example and not limitation, to acknowledgment signaling in a multi-carrier environment. Background technique [0002] There are many terminology and acronyms used in the communications technology field. At least some of the following terms and acronyms are referred to in the text that follows, such as in this Background and / or in the ensuing Description section. Accordingly, the following terms and acronyms are defined here: [0003] 3GPP Third Generation Partnership Project [0004] ACK confirmation [0005] ARQ Automatic Repeat Request [0006] CQI channel quality indicator [0007] DC-HSDPA dual carrier / dual cell HSDPA [0008] DTX discontinuous transmission [0009] HARQ hybrid automatic repeat request [0010] HSDPA High Speed ​​Downlink Packet Access [0011] HS-DPCCH high-speed dedicated physical control channel (in WCDMA) [0012] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L1/18
CPCH04L1/0026H04L1/0057H04L1/0073H04L1/12H04L1/1607H04L5/0055H04L27/2646H04L2001/125
Inventor J·贝里曼Y-P·E·王E·拉松
Owner TELEFON AB LM ERICSSON (PUBL)