Method and device for configuring DMRS (demodulation reference signal) scrambling code sequence
A technology of scrambling code sequence and configuration method, applied in the field of communication, can solve the problem of not being able to achieve port orthogonality with DMRS scrambling code sequence, and achieve the effects of ensuring signal demodulation performance, improving throughput, and reducing mutual interference.
Inactive Publication Date: 2012-02-01
CHINA ACAD OF TELECOMM TECH
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[0020] To sum up, under the existing technology, the initialization value of the DMRS scrambling code sequence obtained by each UE is pre-configured by the base station according to the Cell ID of its serving cell. In this way, in practical applications, UEs in different cells cannot pass the same The DMRS scrambling code sequence realizes the orthogonality between ports, and UEs in the same cell cannot realize the multiplexing of DMRS ports through different DMRS scrambling code sequences
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example 1
[0075] Example 1: N=2, that is, the initialization ID configuration has two values, namely ID1 and ID2, and the MU supports up to 2 layers. The indication content of the DCI after joint encoding is shown in Table 1:
[0076] Table 1
[0077]
example 2
[0078] Example 2: N=2, that is, the initialization ID configuration has two values, namely ID1 and ID2, and the MU supports up to 4 layers. The indication content of the DCI after joint encoding is shown in Table 2:
[0079] Table 2
[0080]
example 3
[0081] Example 3: N=4, that is, the initial ID configuration has four values, namely ID1, ID2, ID3 and ID4, and the MU supports up to 2 layers. The indication content of the DCI after joint encoding is shown in Table 3:
[0082] table 3
[0083]
[0084]
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The invention relates to the field of communication, and discloses a method and device for configuring a DMRS (demodulation reference signal) scrambling code sequence so as to reduce signal interference between UE (user equipment) adopting DMRS multiplexing and guarantee the signal demodulation performance of UE. In the method, a base station refers to the current application scene, and indicates the initial value configuration of the downlink DMRS scrambling code sequence used by single UE or UE group in current transmission through a signaling so as to ensure that the inter-cell or in-cell UE can flexibly perform MU (multiple -user)-MIMO (multiple input multiple output) multiplexing, thereby reducing the mutual interference between the multiplexing UE and guaranteeing the signal demodulation performance of the UE; and meanwhile, the overhead of a PDCCH (physical downlink control channel) is reduced through joint coding, the configuration of the same DMRS scrambling code sequence for the UE of different cells can be flexibly supported, and the configuration of different DMRS scrambling code sequences for the UE of the same cell can be flexibly supported, thereby supporting high-rank MU-MIMO transmission and effectively increasing the system throughput.
Description
technical field [0001] The invention relates to the communication field, in particular to a method and device for configuring a DMRS scrambling code sequence. Background technique [0002] The uplink reference signal transmitted in the downlink transmission of the LTE-A system mainly includes DMRS (demodulation reference signal) and SRS (sounding reference signal), and the DMRS signal is mainly used for channel estimation and synchronization of PDSCH (physical downlink shared channel), so that The receiver successfully demodulates the data. The scrambling code sequence of the DMRS signal (referred to as the DMRS scrambling code sequence) is initialized and configured according to the cell ID of the serving cell, and the DMRS scrambling code sequence in different cells generally has different initialization configuration methods. In the CoMP (Cooperative multiple point transmission, coordinated multi-point transmission) system, in order to improve the spectrum efficiency, MU...
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Inventor 陈文洪高秋彬彭莹
Owner CHINA ACAD OF TELECOMM TECH
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