Method for sending hybrid automatic repeat request indicator channel, and base station
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A technology of retransmission indication, base station, applied in transmission system, digital transmission system, error prevention/detection using return channel, etc., can solve the problem of reducing the flexibility of transmission mode of physical downlink shared channel, etc. Effects of Frequency Resource Conflict
Inactive Publication Date: 2014-09-10
SHARP KK
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Moreover, the existing PHICH is multiplexed within the entire downlink system bandwidth, and the existing PHICH scheme is not suitable for demodulation based on DMRS, because when all DMRS ports are used for PHICH demodulation, it will reduce the The flexibility of the transmission mode of the PHICH time-division multiplexed physical downlink shared channel (PDSCH)
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example 1
[0049] Example 1: CSS of ePDCCH is composed of N PRBs, N={3, 6, 9}.
[0050] In this example, m=3 REGs for each ePHICH group are respectively multiplexed on different m=3 CSS-PRBs. First, the CSS-PRBs are sequentially numbered, denoted as In addition, 10 ePHICH-REGs are pre-defined in each CSS-PRB, numbered sequentially as Such as image 3 and Figure 4 shown.
example 1-1
[0051] Example 1-1: The ePHICH group corresponds to the triplet #{x, y, z} composed of the same ePHICH-REG sequence number, at this time x=y=z, and these 3 REGs come from 3 different CSS- PRB, as shown in Table 1 below.
example 1-2
[0052] Example 1-2: The ePHICH group corresponds to the triplet #{x, y, z} composed of different ePHICH-REG serial numbers. At this time, x≠y≠z, and these 3 REGs come from 3 different CSS- PRB, as shown in Table 1 below. For example, when N=9, the sequence number triplet #{x, y, z} for ePHICH-REG can be pre-defined as #{0, 3, 6}, #{1, 4, 7}, #{2, 5, 8}.
[0053]
[0054] Table 1. When CSS consists of N={3, 6, 9} PRBs, PRB selection of ePHICH group
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Abstract
The invention provides a method executed by a base station. The method comprises: generating the information bit of an enhancement physical hybrid automatic repeat request indicator channel (ePHICH) comprising system information of the base station; performing repeated coding, modulation and spectrum spreading on the information bit of the ePHICH so as to generate an ePHICH sequence; performing code division multiplexing and interlacing on the generated ePHICH to obtain an ePHICH set sequence; selecting a physical resource block (PRB) from the PRBs occupied by the common search space (CSS) of an enhanced physical downlink control channel (ePDCCH); and according to a service cell identification, executing the resource mapping of the ePHICH set sequence in the selected PRB. The invention also provides a base station. By using the method and the base station, provided by the invention, the energy utilization efficiency in an LTE-Advanced system can be enhanced, the frequency spectrum efficiency is improved, and the time-frequency resource conflicts among cells are reduced.
Description
technical field [0001] The invention relates to the technical field of wireless communication. More specifically, the present invention relates to a method for sending a hybrid automatic repeat request (HARQ) indicator channel of a serving cell and a base station. Background technique [0002] The Long Term Evolution (LTE) project deployed by the 3rd Generation Partnership Project (3GPP) aims to provide increasingly diverse communication services, of which packet voice communication is a part. In the first version of 3GPP LTE (ie, Release8), Orthogonal Frequency Division Multiple Access (OFDMA) and Multiple Antenna (MIMO) technologies were introduced. In November 2010, the Release 10 version of 3GPP was evaluated and tested by the International Telecommunication Union, and officially became the fourth-generation global mobile communication standard LTE-Advanced. In the LTE-Advanced standard, carrier aggregation (CA), enhanced inter-cell interference coordination technology...
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