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Random access and random access control methods and devices, and random access system

A random access and control channel technology, applied in the field of communication, can solve problems such as unable to receive PDCCH correctly, not supporting CSS search, etc.

Inactive Publication Date: 2012-07-04
CHINA ACAD OF TELECOMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the existing Msg2 receiving mechanism, Msg2 scheduling uses RA-RNTI scrambled PDCCH, RA-RNTI scrambled PDCCH needs to be searched in CSS, but CSS search is not supported on SCell, so it cannot be received correctly on SCell RA-RNTI scrambled PDCCH

Method used

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  • Random access and random access control methods and devices, and random access system
  • Random access and random access control methods and devices, and random access system
  • Random access and random access control methods and devices, and random access system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] Embodiment 1: In this embodiment, Msg2 and data are not multiplexed, and Msg2 is only allowed to be transmitted within the RAR window. Assumption: 1 PCell and 1 SCell are configured for UE, SCell is scheduled by PCell across carriers

[0101] see Figure 8 As shown, the specific implementation method of embodiment 1 includes the following steps:

[0102] Step 801: ENB sends PDCCH order on PCell to carry dedicated preamble and PRACH resource indication, and notifies UE to initiate non-contention random access on SCell;

[0103] Step 802: The UE sends the dedicated preamble on the SCell using the PRACH resource;

[0104] Step 803: The ENB receives the dedicated preamble sent by the UE on the SCell, and identifies the UE.

[0105] Step 804: ENB can send Msg2 to UE through PCell or SCell in RAR winow, Msg2 transmission uses MAC CE format, and can be transmitted on SCell or PCell. Msg2 is scheduled to transmit the PDCCH scrambled by the C-RNTI, and the PDCCH must be tran...

Embodiment 2

[0110] Embodiment 2: In this embodiment, Msg2 and data are multiplexed, and Msg2 is only allowed to be transmitted within the RAR window. Assumption: 1 PCell and 1 SCell are configured for the UE, and the SCell is scheduled by the PCell across carriers.

[0111] see Figure 9 As shown, the specific implementation process of embodiment 2 is as follows:

[0112] Step 901: ENB sends PDCCH order on PCell to carry dedicated preamble and PRACH resource indication, and notifies UE to initiate non-contention random access on SCell;

[0113] Step 902: The UE sends the dedicated preamble on the SCell using the PRACH resource;

[0114] Step 903: The ENB receives the dedicated preamble sent by the UE on the SCell, and identifies the UE.

[0115] Step 904: ENB can send Msg2 to UE through PCell or SCell in RAR winow, Msg2 transmission uses MAC CE format, and can be transmitted on SCell or PCell. Msg2 is scheduled to transmit the PDCCH scrambled by the C-RNTI, and the PDCCH must be trans...

Embodiment 3

[0120] Embodiment 3: Msg2 and data are multiplexed, and the base station configures the Msg2 receiving time period through RRC / MAC / L1 signaling. Assumption: 1 PCell and 1 SCell are configured for the UE, and the SCell is scheduled by the PCell across carriers.

[0121] see Figure 10 As shown, the specific implementation process of embodiment 3 is as follows:

[0122] Step 100: The base station configures the time period for receiving Msg2 on the SCell. RRC / MAC / PDCCH signaling can be used. If it is RRC signaling, it can be a single notification signaling, or it can be combined with other RRC signaling, such as with SCell add signaling merge.

[0123] Step 101: ENB sends PDCCH order on PCell to carry dedicated preamble and PRACH resource indication, and notifies UE to initiate non-contention random access on SCell;

[0124] Step 102: The UE sends the dedicated preamble on the SCell using the PRACH resource;

[0125] Step 103: The ENB receives the dedicated preamble sent by th...

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PUM

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Abstract

The invention discloses a random access method, a random access control method, a random access device, a random access control device and a random access system, and aims to realize random access through secondary cells. The random access method for a terminal side comprises the following steps of: receiving a physical downlink control channel (PDCCH) instruction of initiating non-competitive random access on a specified secondary cell from a base station by using user equipment (UE), wherein the PDCCH instruction comprises a special preamble number and a physical random access channel (PRACH) resource indication; transmitting a special preamble corresponding to the special preamble number on the secondary cell by utilizing indicated PRACH resources; and performing cell radio network temporary identifier (C-RNTI)-scrambled PDCCH blind detection in a UE specific search space within a determined set time bucket, determining that the random access succeeds if an Msg2 scheduled by a PDCCH is obtained within the set time bucket, and determining that the random access fails if the Msg2 scheduled by the PDCCH is not obtained within the set time bucket.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a method, device and system for random access and its control. Background technique [0002] The peak rate of the long-term evolution advanced system (LTE-A, LTE Advanced) is greatly improved compared with the long-term evolution system (LTE), and it is required to reach 1 Gbps in the downlink and 500 Mbps in the uplink. At the same time, the LTE-A system requires good compatibility with the LTE system. The LTE-A system introduces a Carrier Aggregation (CA, Carrier Aggregation) technology based on the need to increase the peak rate, be compatible with the LTE system, and make full use of spectrum resources. [0003] The carrier aggregation technology means that a UE can aggregate multiple cells at the same time, and multiple cells can simultaneously provide data transmission services for the UE. In the carrier aggregation system, the carriers corresponding to each...

Claims

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Application Information

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IPC IPC(8): H04W74/08
Inventor 赵亚利许芳丽
Owner CHINA ACAD OF TELECOMM TECH
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