Data transmission method, base station and terminal

A data transmission method and technology for carrying data, which can be applied to digital transmission systems, separation devices of transmission paths, transmission systems, etc., and can solve problems such as inefficiency of random access procedures.

Active Publication Date: 2015-10-14
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the scenario of small data and a large number of access devices, this frequent random access process becomes very inefficient

Method used

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  • Data transmission method, base station and terminal
  • Data transmission method, base station and terminal
  • Data transmission method, base station and terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0137] In order to facilitate the understanding of this application, this embodiment specifically describes the allocation of preamble sequences and payload resources.

[0138] Figure 6 It is a schematic diagram of allocation of preamble and payload resources in Embodiment 1, wherein the reserved preamble resources and payload resources are at the same time but with different frequencies. Among them, the preamble resources occupy 6 PRBs, and the load resources occupy 12 PRBs. A total of 12 sequences are supported in the preamble resource to be multiplexed together by orthogonal or quasi-orthogonal coding. The payload resource is divided into two sub-resources, where the first 6 preamble sequences are mapped to the first payload sub-resource, and the last 6 preamble sequences are mapped to the second payload sub-resource. Each sequence corresponds to a modulation and coding scheme, and the modulation and coding schemes corresponding to different sequences may be different. ...

Embodiment 2

[0144] In order to facilitate the understanding of this application, this embodiment specifically describes the way of sending and feeding back payload data.

[0145] In this embodiment, an example is used to illustrate how the base station detects payload data and its feedback mechanism. When the terminal selects a random access preamble, it will calculate an identifier based on the time-frequency resource where the preamble is located and the number of the selected preamble sequence. Here, it is called PARNTI (payload-RNTI). For example, PARNTI can be calculated according to the following formula inferred:

[0146] PARNTI=1+i id +N×f id +M×N×s id

[0147] Among them, i id The time resource number for the leader, f id The number of the frequency resource where the preamble is located, s id is the preamble sequence number, N is the number of reserved time resources, and M is the number of reserved frequency resources. The terminal uses PARNTI to scramble the cyclic red...

Embodiment 3

[0157] In order to facilitate the understanding of this application, this embodiment further specifically explains the fallback transmission mode as follows:

[0158] In the present invention, the small data transmission of the terminal can completely rely on the above Figure 4 The method described is done. Fallback transmission is used as an enhanced mode in the present invention.

[0159] In some scenarios, the terminal cannot use one load transmission to complete the required data transmission, for example, there is unsent data in the cache or data for which NACK feedback is received or data for which no feedback information is detected. One method is that the terminal resends the random access preamble and payload data until the data transmission is completed. Another way is to use fallback transport as described in the present invention. When using fallback transmission, the base station sends control information. The control information includes information such as ...

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Abstract

A data transmission method is provided. The method includes obtaining configuration information, wherein the configuration information indicates transmission resources of a random access preamble and payload data corresponding to the random access preamble, transmitting the random access preamble and the payload data at the transmission resources, modulating the payload data using a modulation scheme supporting asynchronous transmission, and receiving feedback information, wherein the feedback information comprises an indication which indicates whether the payload data is successfully received. Various examples of the present disclosure also describe a method for receiving data with space multiplexing which is applied to a base station side, and further describe a terminal and a base station. Employing the examples of the present disclosure, transmission efficiency of long duty cycle and sporadic small data packets of a large number of devices in the Internet of Things in future communication systems can be improved.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular to a data transmission method, a base station and a terminal. Background technique [0002] With the development of wireless communication technology, more and more application technologies have been developed. These application technologies use wireless communication facilities to provide a new way of information interaction for human life and work for various scenarios. However, these fast-emerging application methods also pose unprecedented challenges to wireless communication technology. Among many challenges, the rapidly emerging Internet of Things services are becoming a hotspot in wireless communication research. In order to provide a network where people can seamlessly connect with nature, machines, and even machines with machines, wireless communication technology must adopt new solutions to meet possible needs. [0003] The Internet of Thing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/12H04W72/04H04W74/08
CPCH04W74/0833H04B7/01H04B7/0452H04L1/1607H04L27/264H04L27/2646H04W74/008H04W28/06H04L5/0007H04L5/0023H04L5/0028H04L5/0053H04L5/0092H04L27/2613H04L1/1671H04L27/26412H04L27/26416H04L27/26414H04L1/00
Inventor 孙鹏飞喻斌
Owner BEIJING SAMSUNG TELECOM R&D CENT
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