Method and device for sending data

A transmission method and data technology, which are applied in the field of data transmission methods and devices, and can solve the problem of not being able to use time-frequency resources at the same time.

Active Publication Date: 2014-03-26
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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example 1

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

[0124] For example, if the first configured reference signal is a reference signal defined in an existing LTE specification, such as a cell reference signal (CRS), a demodulation reference signal (DMRS), and a channel state information reference signal (CSI-RS). At this time, in step 101, the division of the OFDM symbol pair can make the position of the OFDM symbol pair and the position of the OFDM symbol occupied by the first set reference signal in the existing LTE specification (abbreviated as the first set reference signal occupies OFDM in LTE). The positions of symbols) are close to each other, 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 specification. After being protected in this way, the number of OFDM symbols actually occupied by the first set reference signal is twice the number of ...

example 2

[0130] Example 2: The first reference signal is set as a newly added reference signal

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

[0132] When dividing OFDM symbol pairs and reference signal resource particle pairs in the time-frequency resources of the current subframe, the physical layer control channel (PDCCH) and physical layer hybrid automatic repeat request (ARQ) indicator channel (PHICH) in the frame structure can be guaranteed as much as possible , Physical Layer Control Channel Format Indicator Channel (PCFICH), Broadcast Channel (PBCH), Cell Reference Signal (CRS), Channel Stat...

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Abstract

The application discloses a method and a device for sending data. The method comprises the following steps: dividing at least one OFDM (Orthogonal Frequency Division Multiplexing) symbol pair in the temporal frequency resource of the current subframe, and forming a resource element (RE) pair by two adjacent resource elements on the same subcarrier in the same OFDM symbol pair; setting at least one resource element pair as a reference signal resource element pair, and setting at least one resource element pair as a data resource element pair; when sending signals corresponding to OFDM symbols are generated, adding a first circulating guard interval before first resource elements in the reference signal resource element pair and the data resource element pair, and adding a second circulating guard interval behind second resource elements in the reference signal resource element pair and the data resource element pair; forming a sending frame by the sending signals corresponding to the generated OFDM symbols and sending the sending frame out. The transmission quality of downlink data and a reference signal can be improved by the technical scheme which is disclosed by the application.

Description

technical field [0001] The present application relates to mobile communication technology, 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 adopts OFDM as the transmission technology for its downlink transmission physical layer air interface. In OFDM-based wireless communication systems, each OFDM symbol is usually attached with a cyclic prefix (CP) for transmission. The CP is a copy of the signal at the end of the OFDM symbol, and it is added before the OFDM symbol during transmission. As a guard interval, the OFDM system has a certain ability to resist inter-symbol interference. When the multipath delay of the wireless channel is less than the length of the CP, the multipath of the wireless channel will not cause OFDM intersymbol interference, and the s...

Claims

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Application Information

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Patent Type & Authority Applications(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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