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Method for configuring signal channel measurement pilot frequency
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A channel measurement pilot and configuration method technology, applied in the field of channel measurement pilot configuration, can solve the problems of sparse distribution, unspecified channel measurement pilots, and increased uncertainty in the implementation scheme of channel measurement pilots. The effect of reducing likelihood, ensuring compatibility, and meeting pilot density requirements
Active Publication Date: 2010-09-22
ZTE CORP
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[0004] Currently, two pilots of the LTE-A system have been defined: channel measurement pilot (CSI-RS) and demodulation pilot (DMRS), which clearly stipulates that the channel measurement pilot is cell-specific (cell-specific). Because demodulation pilots are more sparsely distributed on time-frequency resources, however, how to configure channel measurement pilots in the LTE-A system is not clearly specified, which greatly increases the uncertainty of channel measurement pilot related implementation schemes
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specific Embodiment 1
[0036] In this embodiment, the resources in the LTE system are divided into LTE dedicated resources and LTE-A dedicated resources.
[0037] On LTE dedicated resources, all public pilots are sent according to the configuration of the LTE system, and channel measurement pilots are not sent. The transmission pattern of public pilots is as follows Figure 2A or Figure 2B shown.
[0038] On LTE-A dedicated resources, the common pilots configured by the LTE system are sent on the first two symbols of each subframe, the channel measurement pilots are sent on the remaining symbols of each subframe, and the common pilots sent on the first two symbols frequency as the channel measurement pilot for antenna ports 0, 1, 2, and 3.
[0039] For LTE-A dedicated resources, when channel measurement pilots are sent on the remaining symbols of each subframe, the channel measurement pilots of antenna ports 4, 5, 6, and 7 are sent on average twice per physical resource block (RB), so , the tota...
specific Embodiment 2
[0041] In this embodiment, resources in the LTE system are divided into LTE / LTE-A common resources and LTE-A dedicated resources.
[0042] Send all common pilots on the full frequency band of LTE / LTE-A shared resources according to the configuration of the LTE system, and reuse the common pilots sent by antenna ports 0, 1, 2, and 3 as antenna ports 0, 1, 2, and 3 Channel measurement pilot.
[0043] On LTE / LTE-A shared resources, channel measurement pilots are sent on average once every 12 subcarriers. The transmission interval of the channel measurement pilot is in units of subframes, and the transmission interval can be configured by the high layer. For example, the high layer configures the transmission interval as 1ms, 2ms, 5ms, 10ms, etc. The transmission pattern of the channel measurement pilot is as follows Figure 4 shown.
[0044] On LTE-A dedicated resources, the common pilots configured by the LTE system are sent on the first two symbols of each subframe, the chann...
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Abstract
The invention discloses a method for configuring a signal channel measurement pilot frequency. The sending density of the signal channel measurement pilot frequency on an LTE private resource or an LTE / LTE-A shared resource of an LTE-A system is different from that on an LTE-A private resource. So, the scheme of the invention can maintain the sending of a common pilot frequency of an LTE system, and has a very small influence on an LTE user. The scheme of the invention not only can well ensure the compatibility to the LTE system, but also takes the promotion of LTE-A user performance into consideration. In the LTE / LTE-A shared resource, the signal channel measurement pilot frequency in the scheme adopts a sparser configuration, reduces the probability of degradation of LTE user performance, and simultaneously can meet the signal channel measurement requirements when a low-speed LTE-A user uses COMP and high-order MIMO. The configuration mode, provided by the scheme of the invention, of adopting different signal channel measurement pilot frequencies for different resources can well meet different pilot frequency density requirements of low-speed and high-speed users.
Description
technical field [0001] The invention relates to mobile communication technology, in particular to a method for configuring channel measurement pilots. Background technique [0002] In order to improve the throughput of the cell and carry out interference coordination among cells, a new generation of wireless communication system, such as the advanced long-term evolution (LTE-A or LTE-Advance, Long-Term Evolution Advance) system, advanced international wireless communication (IMT-A or IMT-Advance, International Mobile Telecommunication advance) systems, etc. have introduced a network-level collaborative transmission technology (COMP, Coordinate Multipoint Transmission and Reception). [0003] In the current implementation scheme of the LTE-A system, it is proposed that LTE and LTE-A can use time division multiplexing (TDM) or frequency division multiplexing (FDM) to divide resources. In the TDM mode, time resources can be divided into long-term evolution (LTE, Long-Term Evol...
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