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Mapping method and device for physical hybrid automatic repeat request indicator channel

A technology of automatic retransmission request and indication channel, applied in the field of mobile communication, to achieve the effect of improving transmission efficiency and ensuring reliability and stability

Inactive Publication Date: 2013-02-20
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is used to solve the mapping problem from the physical hybrid automatic repeat request indication channel to the time-frequency resource of the out-of-band mobile relay or higher version terminal in the high-speed mobile scenario

Method used

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  • Mapping method and device for physical hybrid automatic repeat request indicator channel
  • Mapping method and device for physical hybrid automatic repeat request indicator channel
  • Mapping method and device for physical hybrid automatic repeat request indicator channel

Examples

Experimental program
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Effect test

Embodiment 1

[0074] In the PHICH mapping method provided in this embodiment, the reliability and stability of the PHICH transmission is ensured only by increasing the repetition times of the PHICH, thereby ensuring that the receiving end can receive the PHICH correctly and improving the transmission efficiency of the entire communication system. The steps of this embodiment are as follows:

[0075] Step 101, using 4 repetitions of repetition coding for 1-bit HARQ ACK / NACK;

[0076] Step 102, the 4 bits obtained after repetition are modulated by BPSK to form 4 REs;

[0077] Step 103, performing 4-fold spread spectrum on the modulated 4 REs to finally form 16 REs;

[0078] Step 104, after multi-antenna processing, the 16 REs are mapped to 4 REGs, such as Figure 5 The specific mapping rules are as follows:

[0079] The positions of the four REGs in the frequency domain are determined by the following formula:

[0080] Normal PHICH duration:

[0081]

[0082] Extended PHICH duration: ...

Embodiment 2

[0101] In the PHICH mapping method provided in this embodiment, the reliability and stability of PHICH transmission are guaranteed only by expanding the spreading factor of PHICH, thereby ensuring that the receiving end can receive PHICH correctly and improving the transmission efficiency of the entire communication system. . The steps of this embodiment are as follows:

[0102] Step 201, 1-bit HARQ ACK / NACK repeated 3 times;

[0103] Step 202: The repeated 3 bits are modulated by BPSK to form 3 REs;

[0104] Step 203: 8-fold spread spectrum is used for 3 REs, and finally 24 REs are formed;

[0105] Step 204, map 24 REs to 6 REGs after multi-antenna processing, such as Figure 6 Show. Since the spreading factor is increased, more PHICHs can be multiplexed in one PHICH group.

[0106] The specific mapping rules are as follows:

[0107] The positions of the 6 REGs in the frequency domain are determined by the following formula:

[0108] Normal PHICH duration:

[0109] ...

Embodiment 3

[0119] In the PHICH mapping method provided by this embodiment, the steps of modulation, coding, and spectrum spreading are the same as those of the prior art, and the reliability of PHICH transmission is guaranteed only by repeating the three REGs obtained after mapping in the time domain in the time domain. and stability, thereby ensuring that the receiving end can correctly receive the PHICH, and improving the technical effect of the transmission efficiency of the entire communication system. The steps of this embodiment are as follows:

[0120] Step 301: 1-bit HARQ ACK / NACK is repeated 3 times to become 3 bits;

[0121] Step 302: 3 bits are modulated by BPSK to form 3 REs;

[0122] Step 303: Perform 4-fold spread spectrum on 3 REs and finally output 12 REs;

[0123] Step 304: After the 12 REs are processed by multiple antennas, they are mapped to 3 REGs according to a certain mapping rule;

[0124] Step 305: Repeat the three REGs in the time domain;

[0125] During Nor...

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Abstract

The invention discloses a mapping method and a device for a physical hybrid automatic repeat request indicator channel and solves the problem of mapping of the physical hybrid automatic repeat request indicator channel of out-of-band mobile relay or higher version terminal to time-frequency resource in high speed mobile environments. According to the mapping method and the device, the reliability and stability of the physical hybrid automatic repeat request indicator channel (PHICH) transmission can be guaranteed by increasing times of repetition of the PHICH and / or increasing spreading factors of the PHICH and / or repeating finally obtained K resource element groups (REGs) on time domain, thereby a receiving end can accurately receive the PHICH, and the transmission efficiency of an entire communication system can be improved.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to the mapping of a Physical Hybrid Automatic Repeat Request Indicator Channel (PHICH) in an advanced long-term evolution (Long Term Evolution Advanced, LTE-A) system in 3GPP Methods and devices. Background technique [0002] The Long Term Evolution (LTE) system, the Long Term Evolution LTE-A system and the International Mobile Telecommunication Advanced (IMT-Advanced) system all use Orthogonal Frequency Division Multiplexing (OFDM) ) technology, the OFDM system is a time-frequency two-dimensional data form. 1 subframe (subframe) is composed of 2 slots (slots), when the normal cyclic prefix (Normal Cyclic Prefix, Normal CP), each slot is composed of 7 OFDM symbols; when the extended CP (Extended CP), each slot It consists of 6 OFDM symbols. [0003] For the convenience of description, the following describes several terms and definitions in the LTE / LTE-A system: [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04L1/18H04L1/16
Inventor 袁明毕峰梁枫杨瑾吴栓栓
Owner ZTE CORP
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