Dual network common mode method and system

A common mode, LTE-A technology, applied in the field of communication, can solve the problems of low spectral efficiency, low frequency band cannot be effectively used, and spectral efficiency has no contribution, so as to reduce construction cost and hardware manufacturing cost, work risk and implementation The effect of low difficulty and reducing the number of launch channels

Inactive Publication Date: 2016-02-24
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the spectral efficiency of the Code Division Multiplexing (CDM) technology used in the 3G system is lower than that of OFDM, so that a large number of low-frequency bands with excellent wireless performance occupied by the 3G system cannot be effectively utilized.
[0004] The usual common mode solutions focus on reducing construction costs and hardware manufacturing costs, such as: common site, common antenna feeder, common radio frequency (RRU, RadioRemoteUnite) and baseband (BBU, BaseBandUnite), etc., but it does not make any contribution to spectral efficiency

Method used

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  • Dual network common mode method and system
  • Dual network common mode method and system

Examples

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Embodiment 1

[0043] This embodiment takes CDMA and LTE common mode as an example, where the CDMA system can be WCDMA, CDMA1x, TD-SCDMA, etc. The specific steps are as follows:

[0044] Step 1, determining the CDMA and LTE system frequency band superposition mode;

[0045] Let LTE uplink frequency band ULBW, downlink frequency band DLBW; and CDMA forward link frequency band FLBW, reverse link frequency band RLBW, for TD-SCDMA, FLBW and RLBW are the same frequency band;

[0046] Superimpose FLBW and RLBW on one or two frequency bands of LTE to ensure that FLBW and RLBW do not overlap, attach figure 1 , 2 Two superposition methods are given;

[0047] Step 2, limiting the maximum received PSD of the signal on the frequency band where the LTE and CDMA signals are superimposed;

[0048] Let LTE receive PSD be PSDRxL (unit is dBm), PSD of CDMA system is PSDRxC (unit is dBm), and the signal detection threshold of CDMA system is SINRC (unit is dB), then:

[0049] PSDRxC-PSDRxL-Noise>=SINRC+Inte...

Embodiment 2

[0054] This embodiment takes CDMA and LTE-A common mode as an example, where the CDMA system can be WCDMA, CDMA1x, TD-SCDMA, etc. The specific steps are as follows:

[0055] Step 1, determining the CDMA and LTE-A system frequency band superposition mode;

[0056] Let LTE-A uplink frequency bands ULBW1, ULBW2, ..., ULBWm; downlink frequency bands DLBW1, DLBW2, ..., DLBWn; and CDMA forward link frequency band FLBW, reverse link frequency band RLBW, for TD-SCDMA, FLBW It is the same frequency band as RLBW;

[0057] Superimpose FLBW and RLBW on one or two frequency bands of LTE-A to ensure that FLBW and RLBW do not overlap, image 3 One superposition method is given;

[0058] Step 2, limiting the maximum received PSD of the signal on the frequency band where the LTE-A and CDMA signals are superimposed;

[0059] Let LTE-A receive PSD be PSDRxL (unit is dBm), PSD of CDMA system is PSDRxC (unit is dBm), and the signal detection threshold of CDMA system is SINRC (unit is dB), then:...

Embodiment 3

[0064] This embodiment takes CDMA and LTE / LTE-A common mode as an example, and describes a CDMA and LTE / LTE-A common mode system, as shown in the attached Figure 4 As shown, its composition is described as follows:

[0065] The CDMA and LTE / LTE-A frequency band superposition mode determination unit 401 is used to determine the CDMA and LTE / LTE-A frequency band superposition mode, so as to finally superimpose the CDMA signal on the LTE / LTE-A signal, specifically as follows:

[0066] Let LTE / LTE-A uplink frequency bands ULBW1, ULBW2, ..., ULBWm; downlink frequency bands DLBW1, DLBW2, ..., DLBWn; and CDMA forward link frequency band FLBW, reverse link frequency band RLBW, for TD-SCDMA , FLBW and RLBW are the same frequency band;

[0067] Superimpose FLBW and RLBW on one or two frequency bands of LTE / LTE-A to ensure that FLBW and RLBW do not overlap. Figures 1 to 3 Three superposition methods are given;

[0068] The LTE / LTE-A power control unit 402 is configured to limit the ...

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Abstract

Disclosed in the present invention are a dual network common mode method and a system. A CDMA signal is superimposed on an LTE / LTE-A signal; on the spectrum on which the CDMA and LTE / LTE-A signals are superimposed, the maximum PSD received by the LTE / LTE-A signal on the overlapping resources is limited. The dual network common mode technology of the present invention allows for an LTE / LTE-A and CDMA common carrier frequency, effectively increasing the efficiency and utilization of the wireless spectrum occupied by CDMA networks, and thereby effectively solving the problem of spectrum resource waste resulting from low utilization of the 3G spectrum and guard intervals between different systems. At the same time, the technology reduces the number of transmission channels of the RRU, making it possible for a single-channel RRU to support multiple networks. The technology also reduces construction costs and hardware manufacturing costs in other conventional common mode schemes and minimizes the risk and implementation difficulties of a smooth evolution from 3G to LTE / LTE-A.

Description

technical field [0001] The invention relates to the communication field, in particular to a dual-network common mode method and system. Background technique [0002] With the development of wireless broadband communication technology and the continuous improvement of user needs, wireless spectrum resources, as a non-renewable resource, have become more and more precious. Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) technology greatly improves the spectral efficiency due to its high spectral efficiency and simple implementation. Currently, both the Long Term Evolution (LTE, Long Term Evolution) system and the Advanced LTE (LTE-A, LTE Advanced) system use the OFDM technology. [0003] However, Code Division Multiple Access (CDMA) technology is widely used as the basis of 3G systems and will continue to operate for a long time. However, the spectral efficiency of the Code Division Multiplexing (CDM) technology adopted by the 3G...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/14
CPCH04W16/14H04W88/10
Inventor 张庆宏
Owner ZTE CORP
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