Interference suppression method of physical upstream control channel (PUCCH) in LTE (Long Term Evolution) system

A physical uplink and control channel technology, applied in the field of communication, can solve the problems that cannot be solved, reduce the utilization rate of system resources, reduce the utilization rate of spectrum, etc., and achieve the effect of eliminating inter-cell interference and improving the utilization rate of system resources

Active Publication Date: 2010-10-27
北京万海云科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] 2. The transmission power of the macro base station and the home base station are very different, and the home base station is often within the coverage of the macro base station
[0012] 3. For different terminals that are close to each other, the transmission power varies greatly due to the different access base stations (including macro base stations or home base stations).
The method leading to this randomization of interference cannot solve the interference between the physical uplink control channel (PUCCH) between the macro base station and the femto base station, and the femto base station
[0014] At present, this problem can be partly solved by frequency division multiplexing (FDM), but FDM reduces the resource utilization of the system: First, the macro base station and the home base station multiplex the PUCCH on the frequency, which increases the use of the system. Control signaling resource overhead, thereby reducing spectrum utilization

Method used

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  • Interference suppression method of physical upstream control channel (PUCCH) in LTE (Long Term Evolution) system
  • Interference suppression method of physical upstream control channel (PUCCH) in LTE (Long Term Evolution) system
  • Interference suppression method of physical upstream control channel (PUCCH) in LTE (Long Term Evolution) system

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0083] Example 1 corresponds to the above-mentioned multiplexing scheme 1: Assume that in the simplified implementation environment, according to the plan, RB0 will be allocated in the macro base station for the PUCCH of format 2, and RB1, RB48, and RB49 will be allocated for the PUCCH of format 1, and pre- 30 cs values ​​are reserved for the format 1 transmission of the home base station, and 6 cs values ​​are used for the format 2 transmission of the home base station, and the following steps must be followed:

[0084] 1. According to the network planning, configure the PUCCH of the macro base station:

[0085] 1.1. Among the total 50 RBs, the macro base station allocates 4 RBs for the PUCCH, wherein RB0 is used for the format 2 control channel, and RB1, RB48, and RB49 are used for the format 1 control channel.

[0086] 1.2, RB0 has a total of 12 format two channels 6 are reserved for home base stations (such as ).

[0087] 1.3. RB1, RB48, and RB49 have a total of 108 for...

example 2

[0095] Example 2 corresponds to the description of the above multiplexing scheme 2: Assume that in the simplified implementation environment, according to the plan, RB0 will be allocated in the macro base station for the PUCCH of format 2, and RB1, RB48, and RB49 will be allocated for the PUCCH of format 1. Reserve 40 cs values ​​for the format 1 transmission of the femto base station (the reserved femto base station resources can be allocated across RBs), and 6 cs values ​​for the format 2 transmission of the femto base station, the following steps must be followed :

[0096] 1. According to the network planning, configure the PUCCH of the macro base station:

[0097] 1.1. Among the total 50 RBs, the macro base station allocates 4 RBs for the PUCCH, wherein RB0 is used for the format 2 control channel, and RB1, RB48, and RB49 are used for the format 1 control channel.

[0098] 1.2, RB0 has a total of 12 format two channels 6 are reserved for home base stations (such as )...

example 3

[0106] Example 3 corresponds to the above-mentioned multiplexing scheme three: assuming that the multiplexing scheme three is further implemented on the basis of example 1, the distribution result of this embodiment 3 is as follows Figure 8 and 9 shown. That is, on the basis of the allocation in Example 1, RB2 and RB47 are added for the PUCCH of the home base station.

[0107] Step 205: Perform an initialization operation on the HNB, including detecting adjacent cells, and establishing a communication connection with the macro BS.

[0108] Step 206: The macro base station configures the HNB accordingly.

[0109] Specifically, the macro base station multiplexes the CAZAC base sequence with the home base station according to the scheme selected in step 202 . If in step 202, the first method of regularly allocating PCIs of HNBs is selected to reuse the CAZAC base sequence, the macro base station needs to allocate PCIs for HNBs in this step to configure the HNBs.

[0110] Acc...

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Abstract

The invention discloses an interference suppression method of a physical upstream control channel (PUCCH) in an LTE (Long Term Evolution) system. The method comprises the following steps of: (a) selecting a multiplexing mode of a CAZAC (Constant Amplitude Zero Auto Correlation) basic sequence between a macro base station and a domestic base station which are configured with the same frequency; (b) selecting a resource coordination method of the PUCCH and selecting a resource multiplexing mode of the PUCCH; (c) correspondingly configuring the domestic base station to the macro base station; and (d) correspondingly acquiring the CAZAC basic sequence of the domestic base station by a cell terminal of the macro base station, then distributing a PUCCH resource to a terminal accessed into the domestic base station and suppressing intercell interference of the PUCCH between the macro base station and the domestic base station. By adopting the method, the intercell Interference of the PUCCH between the macro base station and the domestic base station as well as between the domestic base stations can be eliminated, the intercell Interference can be reduced, and the system resource utilization ratio can be improved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a physical uplink control channel (physical uplink control channel, hereinafter referred to as PUCCH) in a long-term evolution system (Long-Term Evolution, hereinafter referred to as LTE). - eNB) under the heterogeneous network, and an interference suppression method between home base stations. Background technique [0002] The introduction of femto base stations enhances indoor coverage quality and improves system throughput, which is a hot issue in the next generation of wireless communication systems. However, interference between macro base stations, femto base stations, and femto base stations seriously restricts the improvement of system throughput. How to solve the interference between macro base stations, femto base stations, and femto base stations, especially the interference of physical control channels , is a serious problem at present. [0003] For the uplink, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14H04W16/18
Inventor 纪子超温文坤江明
Owner 北京万海云科技有限公司
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