Downlink timeslot interference estimation method in TD-SCDMA system
A technology of synchronous code division multiple access and time slot interference, which is applied in the field of communication, can solve the problem of low accuracy of downlink time slot interference evaluation, and achieve the effect of improving accuracy
Active Publication Date: 2009-08-05
ZTE CORP
View PDF0 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] In view of the above analysis, the present invention aims to provide a downlink time slot interference evaluation method in a time division duplex synchronous code division multiple access system to solve the low accuracy of downlink time slot interference evaluation existing in the prior art The problem
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0026] Preferred embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and are used together with the embodiments of the present invention to explain the principles of the present invention.
[0027] The embodiment of the present invention is based on the following agreement: Node B supports AOA dedicated measurement; in the downlink direction, the signal attenuation characteristics of the broadcast channel and other downlink dedicated physical channels are consistent; the radio network controller can correctly obtain all pending and accessed Path loss of the UE in the cell.
[0028] The method described in the embodiment of the present invention mainly includes: grouping the UEs from a spatial perspective according to the measured value of AOA (angle of arrival), and then, for the UEs in the same group, use the measured value of AOA, the pat...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an evaluation method of downlink time slot interference in a time division duplex synchronous code division multiple access system. The method comprises the following steps: grouping is carried out to a plurality of accessed user equipments in the same cell according to a measured value of an arrival direction angle of user equipment to be accessed; user equipments which meets the preset requirements is screened from the user equipments in the same group; relevant calculation is carried out to all the user equipment meeting the preset requirements to obtain the superimposed interference introduced by main lobe forming of an intelligent antenna; and evaluation is carried out to the superimposed interference obtained according to the known downlink time slot interference and calculation to obtain accurate downlink time slot interference. The invention effectively utilizes space information of UE by AOA special measurement provided by a node B, simultaneously combines downlink gain of the intelligent antenna and road loss information of the UE and can consider the superimposed interference introduced by the main lobe forming of the intelligent antenna into thedownlink evaluation, thus improving the accuracy of the downlink time slot interference evaluation under the condition of applying the intelligent antenna.
Description
technical field [0001] The invention relates to the field of communication technology, in particular to a downlink time slot interference evaluation method in a time division duplex synchronous code division multiple access system. Background technique [0002] In the third generation mobile communication system based on time division duplex synchronous code division multiple access technology, each subframe is divided into 7 time slots to realize the mechanism of time division multiplexing. For any UE (user equipment) that needs to access a cell, selecting a relatively optimal time slot for it is of great significance for ensuring the connection success rate of the UE and even the system capacity. With the gradual increase of access users in the cell, compared with the uplink direction, the NodeB (Node B) is more likely to have capacity limitation in the downlink direction due to limited transmission power in the downlink direction compared with the uplink direction. There...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/02H04L1/02H04B7/26
Inventor 武舒凡刘庆江王东
Owner ZTE CORP