Method and device for sending data

A sending method and data technology, applied in the field of data sending method and device, capable of solving the problems that time-frequency resources cannot be applied at the same time

Active Publication Date: 2018-04-27
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these two frame structures are quite different, and cannot be applied to different time-frequency resources of signals transmitted by the same carrier frequency at the same time, so they have certain limitations.

Method used

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  • Method and device for sending data
  • Method and device for sending data

Examples

Experimental program
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Effect test

example 1

[0123] Example 1: The first set reference signal is an existing reference signal

[0124] For example, if the first set reference signal is a reference signal defined in an existing LTE specification, such as a cell reference signal (CRS), a demodulation reference signal (DMRS), a channel state information reference signal (CSI-RS), etc. At this time, in step 101, the OFDM symbol pair is divided so that the position of the OFDM symbol pair and the position of the first set reference signal occupying the OFDM symbol in the existing LTE specification (referred to as the first set reference signal occupying the OFDM symbol in the LTE The position of the symbol) is close, and the number of OFDM symbol pairs is consistent with the number of OFDM symbols occupied by the first set reference signal in the existing LTE specifications. After being protected in this way, the number of OFDM symbols actually occupied by the first set reference signal is twice the number of OFDM symbols occupi...

example 2

[0130] Example 2: The first setting reference signal is the newly added reference signal

[0131] For another example, if the pre-mapped first set reference signal is a newly added reference symbol used to demodulate data processed by using the PS-OFDM technology, it is recorded as a phase synchronization reference signal (PSRS) here. In this case, if it is compatible with the OFDM technical standard in the existing LTE specification as much as possible, the specific implementation in the above step 101 can be:

[0132] When dividing OFDM symbol pairs and reference signal resource particle pairs in the time-frequency resources of the current subframe, try to ensure the physical layer control channel (PDCCH) and physical layer hybrid automatic repeat request (ARQ) indicator channel (PHICH) in the frame structure , Physical layer control channel format indicator channel (PCFICH), broadcast channel (PBCH), cell reference signal (CRS), channel state information reference signal (CSI-RS...

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Abstract

The application discloses a data sending method and device. Among them, the method includes: dividing at least one Orthogonal Frequency Division Multiple Access (OFDM) symbol pair in the time-frequency resource of the current subframe, and two adjacent resource element REs on the same subcarrier in the same OFDM symbol pair form a Resource element pair; set at least one resource element pair as a reference signal resource element pair, and set at least one resource element pair as a data resource element pair; when generating a transmission signal corresponding to an OFDM symbol, make the reference signal resource element pair and A first cyclic guard interval is added before the first resource element in the data resource element pair, and a second cyclic guard interval is added after the second resource element in the reference signal resource element pair and the data resource element pair; the generated The sending signals corresponding to the OFDM symbols are composed into a sending frame and sent out. The technical solution disclosed in this application can improve the transmission quality of downlink data and reference signals.

Description

Technical field [0001] This application relates to mobile communication technology, and in particular to a method and device for sending data. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) technology is widely used in mobile wireless communication systems. The 3GPP Long Term Evolution (LTE) mobile communication system also uses OFDM as its downlink transmission physical layer air interface transmission technology. In OFDM-based wireless communication systems, each OFDM symbol is usually transmitted with a cyclic prefix (CP) attached. CP is a copy of the tail signal of the OFDM symbol. It is added before the OFDM symbol for transmission during transmission, as a guard interval, so that the OFDM system has a certain ability to resist inter-symbol interference. When the multipath delay of the wireless channel is less than the CP length, the multipath of the wireless channel will not cause inter-symbol interference of OFDM, and the system performan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
Inventor 王新侯晓林原田笃须田博人
Owner NTT DOCOMO INC
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