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A resource allocation, transmission method and device for reference signals

A technology of reference signal and resource allocation, applied in the direction of selection device, communication between multiple stations, radio/induction link selection arrangement, etc., can solve the problems of sequence interference, sequence planning impact, and increase the complexity of system planning, To achieve the effect of enhancing flexibility and improving flexibility

Active Publication Date: 2008-09-17
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shortening of the sequence will affect the sequence planning of the entire system, that is, there are not enough base sequences to be allocated to the surrounding cells.
In addition, because the frequency resources used by the surrounding cells are relatively independent, if signals of different bandwidths, that is, sequences of different lengths are transmitted on some of the same subcarriers, interference between sequences of different lengths will occur. To avoid or reduce interference, it is necessary to increase the complexity of system planning

Method used

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  • A resource allocation, transmission method and device for reference signals
  • A resource allocation, transmission method and device for reference signals
  • A resource allocation, transmission method and device for reference signals

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Embodiment approach 1

[0039] In the preferred embodiment provided by the present invention, a reference signal resource allocation method provided by the embodiment of the present invention is described in detail by taking CAZAC sequence as the pilot sequence as an example. CAZAC sequences have shifted orthogonal properties. For example, when different users or different transmit antennas use different shifted sequences of the same base sequence, the sequence is transmitted in the time domain, and at the same time, the length of the shift is greater than the maximum multipath delay of the multipath channel (or the total energy is 90 % of the maximum path delay, etc.), the signals of different transmission sequences are orthogonal, and the base station receiving end can eliminate the interference of other users or other antennas by using the sequence correlation, so that a more accurate channel can be obtained Estimated results.

[0040] On the other hand, CAZAC sequences have constant amplitude pr...

Embodiment approach 2

[0056] In another embodiment, the main steps are the same as the previous embodiment, step 301: allocate code channels for measurement pilots within the basic measurement bandwidth; step 302: allocate different measurement bandwidths for measurement pilots of at least two code channels .

[0057] The difference from the foregoing embodiments is that the frequency hopping periods of the measurement pilots of different measurement bandwidths may be different. The frequency hopping period refers to the time interval for the complete frequency hopping of the signal. Usually, the frequency hopping period is related to the measurement bandwidth and the basic measurement bandwidth. That is to say, the measurement bandwidth is different with the frequency hopping period. refer to image 3 , to measure a signal with a bandwidth of 4B, its frequency hopping period is 4 pilot signal transmission intervals, and to measure a signal with a bandwidth of B, its frequency hopping period is 1 ...

Embodiment approach 3

[0061] In another embodiment, the main steps are the same as the previous embodiment, step 401: allocate code channels for measurement pilots within the basic measurement bandwidth; step 402: allocate different measurement bandwidths for measurement pilots of at least two code channels .

[0062] The difference from the foregoing embodiments is that the code channel numbers assigned to each reference signal can be fixed to one code channel for one reference signal as described in the above embodiments. In this embodiment, different code channel numbers can also be changed at different times. Codes are assigned. At this time, either the base station notifies the user of the currently used code channel number; or the user changes the code channel number according to a preset pattern, for example, the code channel number jumps in a pseudo-random manner. For example, from code channel number 0 to code channel number 7, the code channel number is changed every time the channel qua...

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Abstract

The invention discloses a resource distribution method of reference signals, comprising distributing a code channel for the reference signal in a basic frequency hopping bandwidth; and distributing different frequency hopping bandwidths for reference signals in at least two code channels. The invention also discloses a resource distribution device of reference signals, a transmitting method and device of reference signals. With the invention, reference signals with different bandwidths can exist simultaneously, different request of users for the bandwidth can be satisfied. The method can support that a plurality of users simultaneously perform quality measurement of channels with different bandwidths when the method is used for channel quality measurement, thereby increasing flexibility of the system; at the same time, sequences used by the code channels adopt the sequences with the CAZAC characteristic, channel estimation performance is improved, in addition, with the invention according to the invention, the system avoids generation of sequences with different lengths, thereby avoiding interference between short and long sequences in surrounding cells and reducing the complexity of sequence design.

Description

technical field [0001] The present invention relates to wireless communication technology, in particular to a method and device for resource allocation and transmission of reference signals. Background technique [0002] In a wireless communication system with multi-user (terminal) communication, each user transmits on a different wireless channel path, and the channel fading experienced by each user is also different, so that the current user has better transmission performance in certain transmission frequency bands, while in Deep fading on certain frequency bands. In order to improve the capacity and throughput, the system can make full use of the transmission differences between different users, which is usually called multi-user diversity. The system can use the difference in time and frequency of the user's transmission channel to configure different time and frequency band resources for different users through a reasonable and effective scheduling algorithm, so that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38H04B7/26
Inventor 曲秉玉何玉娟
Owner HUAWEI TECH CO LTD
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