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A method and device for allocating cell identifiers in a long-term evolution system

A long-term evolution system and cell identification technology, which is applied in the field of wireless communication systems, can solve problems such as loss of transmission performance, failure to correctly demodulate eNodeB, and degradation of PCFICH demodulation performance, and achieve the effect of avoiding performance deterioration

Active Publication Date: 2018-04-27
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0020] When there is fixed narrowband interference in the LTE downlink network, if the interference overlaps with PCFICH in the frequency domain, the demodulation performance of PCFICH will deteriorate, which will lead to PDCCH demodulation errors and affect downlink performance.
If the narrowband interference and PHICH overlap in the frequency domain, the PHICH will be interfered, so that UE (User Equipment, user equipment) cannot correctly demodulate the uplink ACK / NACK feedback channel of eNodeB (evolved Node B, evolved base station), resulting in uplink Transmission performance loss

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  • A method and device for allocating cell identifiers in a long-term evolution system
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  • A method and device for allocating cell identifiers in a long-term evolution system

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Embodiment Construction

[0061] In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other arbitrarily if there is no conflict.

[0062] A method for assigning cell identity in the long-term evolution system, such as figure 1 Shown, including:

[0063] According to the frequency domain location where the narrowband interference is located, select from the available physical layer cell identification numbers that the narrowband interference does not overlap with the resource particle group occupied by the PCFICH and PHICH to be sent, and allocate them to each physical layer cell Logo.

[0064] Specifically, it includes the following steps:

[0065] 1According to the frequency domain position of the narrowband interference...

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Abstract

The invention discloses a method and device for allocating cell identifiers in a long-term evolution system. The method includes: selecting the narrowband interference and the cell identifier from available physical layer cell identifiers according to the frequency domain position where the narrowband interference is located. The physical control format indication channel (PCFICH) to be sent and the physical hybrid automatic repeat request indication channel (PHICH) occupied by the resource element group do not overlap the cell identification numbers, and assign identification numbers to each physical layer cell. It can be seen from the above scheme that the elements in the set α are calculated by using the present invention, and the frequency domain positions of PCFICH and PHICH are completely staggered from the narrowband interference frequency domain, which effectively avoids the influence of narrowband interference and avoids the performance of PCFICH and PHICH deterioration.

Description

Technical field [0001] The present invention relates to a wireless communication system, and in particular to a method and device for allocating cell identifiers in LTE (Long Term Evolution). Background technique [0002] The LTE project is an evolution of 3G (3rd-Generation, the third generation of mobile communication technology). It improves and enhances the 3G air access technology, using OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) and MIMO (Multiple). -Input Multiple-Output, as its wireless network evolution standard. It can provide peak rates of 326Mbit / s in downlink and 86Mbit / s in uplink under 20MHz spectrum bandwidth, which improves the performance of cell edge users, increases cell capacity and reduces system delay. [0003] The downlink transmission resource particle in the LTE system is represented as RE (Resource Element, resource particle), which is uniquely marked by an index pair (k, l), respectively representing th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/10
CPCH04W16/10
Inventor 苏小明向际鹰杨卓向阳
Owner ZTE CORP