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A method and device for transmitting data in rrc connection state

A technology for transmitting data and connecting states, applied in the field of communication

Active Publication Date: 2020-02-18
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention provides a method and device for transmitting data in an RRC connected state. The method and device provided by the present invention solve the problem of downlink data or signaling caused by random access after the terminal switches to the target cell or receives a PDCCH command in the prior art. Problems with transmission delay and additional signaling overhead

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  • A method and device for transmitting data in rrc connection state
  • A method and device for transmitting data in rrc connection state
  • A method and device for transmitting data in rrc connection state

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Embodiment 1

[0130] Embodiment 1, the specific implementation steps of the method provided in the embodiment of the present invention may be (such as figure 1 shown):

[0131] Step 101, the terminal acquires a random access sequence. The specific implementation method can be:

[0132] A. The terminal receives a handover command in the source cell, instructing the terminal to switch to the target cell. The handover command includes the random access sequence used when the terminal switches to the target cell.

[0133] B. When the base station sends a PDCCH command to the terminal and there is downlink data or signaling to be sent, the base station indicates a random access sequence to the terminal in the PDCCH command.

[0134] Step 102, the terminal uses the received random access sequence to initiate random access in the target cell.

[0135] Step 103, when there is downlink data or signaling corresponding to the terminal to be sent, after receiving the random access sequence sent by t...

Embodiment 2

[0150] Embodiment 2. For the situation that the downlink data arrives but the uplink is not synchronized, the base station sends the random access response message of the terminal in the second MAC PDU except the first MAC PDU. The downlink data or signaling corresponding to the terminal; the specific implementation steps of the method provided by the embodiment of the present invention may be (such as Figure 11 shown):

[0151] Step 1101, when the base station sends a PDCCH command to the terminal and there is downlink data or signaling to be sent, the base station sends indication information instructing the base station to send the first MAC PDU of the random access response message of the terminal while sending the second MAC PDU (the second MAC PDU) The second MAC PDU is to transmit downlink data or signaling of the terminal in other MAC PDUs except the first MAC PDU, and a random access sequence of the terminal.

[0152] In the embodiment of the present invention, the ...

Embodiment 3

[0160] Embodiment 3. The base station will send the downlink data or signaling and timing advance command of the terminal in a non-random access response MAC PDU. The specific implementation includes (such as Figure 12 shown):

[0161] Step 1201, when there is downlink data or signaling to be sent, the base station sends indication information to the random access sequence to the terminal; the indication information is used to indicate the random access sequence of the terminal and the base station will be included in a non-random access response MAC PDU Send the downlink data or signaling and timing advance command of the terminal.

[0162] In this embodiment, the indication information may be the sixth indication information or the seventh indication information, and the specific implementation manner of sending the indication information may be:

[0163] C1. When the terminal is switching cells, the base station carries sixth indication information in the RRC message of t...

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Abstract

The present invention discloses a method and device for a terminal to transmit data under an RRC connected state. The method includes the step that: after a terminal in an RRC connected state is switched to a target cell or receives a PDCCH command, when the terminal initiates non-competition random access, a base station sends a timing advance command corresponding to the terminal to the terminalwhen sending downlink data or signaling corresponding to the terminal. With the method and the device disclosed by the present invention adopted, the problem of the delay and additional signaling overhead of downlink data or signaling transmission caused by random access after a terminal is switched to a target cell or receives a PDCCH command in the prior art can be solved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for transmitting data in an RRC connection state. Background technique [0002] In Long Term Evolution (LTE) and cellular-based Narrow Band Internet of Things (NB-IoT) systems, the random access process is used in multiple events, especially in handover, wireless resource Control (Radio Resource Control, RRC) connection re-establishment and other processes. The random access process is divided into two scenarios, contention access and non-contention access, and the network side maintains a random access sequence group for contention access and a random access sequence group for non-contention access. Scenarios of non-contention access are divided into handover, positioning, and downlink data arrival (uplink out-of-sync). The implementation process of non-contention access can be divided into the following three steps: [0003] Step 1, the base statio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/00H04W74/08H04W76/27
CPCH04W74/006H04W74/0833
Inventor 张元梁靖傅婧
Owner DATANG MOBILE COMM EQUIP CO LTD
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