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A method, base station and user terminal for sending random access response

A random access response and random access request technology, applied in the field of mobile communications, can solve the problems of increasing UE power consumption and wasting downlink resources, and achieve the effect of saving downlink resources and power consumption

Active Publication Date: 2014-10-15
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, this method is a waste of downlink resources, and requires the UE to monitor all the downlink component carriers it supports, increasing the power consumption of the UE

Method used

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  • A method, base station and user terminal for sending random access response
  • A method, base station and user terminal for sending random access response
  • A method, base station and user terminal for sending random access response

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1. The pre-set carrier policy is: the eNB notifies the UE that the downlink component carrier used for non-contention random access is used as the downlink component carrier for sending the random access response. image 3 The flow chart of the method provided by Embodiment 1 of the present invention, such as image 3 As shown, the method may include the following steps:

[0028] Step 301: the eNB sends a PDCCH on the downlink component carrier k to notify the UE to perform non-contention random access.

[0029] Wherein, k is the serial number of the downlink component carrier used to notify the UE to perform the non-contention random access, 1≤k≤N, and N is the number of the downlink component carrier used by the UE.

[0030] The sent PDCCH carries the dedicated pilot and physical random access channel (PRACH) resource information selected for the UE for non-contention random access.

[0031] Step 302: The UE sends a non-contention random access request on...

Embodiment 2

[0038] Embodiment 2, the pre-set carrier policy is: fixedly use one of the multiple downlink component carriers supported by the UE as the downlink component carrier for sending the random access response. Figure 4 The flow chart of the method provided by Embodiment 2 of the present invention, such as Figure 4 As shown, the method may include the following steps:

[0039] Step 401: the eNB sends a PDCCH on the downlink component carrier k to notify the UE to perform non-contention random access.

[0040] Wherein, k is the serial number of the downlink component carrier used to notify the UE to perform the non-contention random access, 1≤k≤N, and N is the number of the downlink component carrier used by the UE.

[0041] The sent PDCCH carries the dedicated pilot and PRACH resource information selected for the UE for non-contention random access.

[0042] Step 402: The UE sends a non-contention random access request on the uplink component carrier according to the dedicated ...

Embodiment 3

[0048] Embodiment 3. The pre-set carrier strategy is: randomly select a downlink component carrier among the multiple downlink component carriers supported by the UE as the downlink component carrier for sending the random access response. In this case, the eNB needs to indicate to the UE The downlink component carrier that sends the random access response. Figure 5 The method flowchart provided for the third embodiment of the present invention, such as Figure 5 As shown, the method may include the following steps:

[0049] Step 501: The eNB notifies the UE to perform non-contention random access through PDCCH or RRC signaling, and the PDCCH or RRC signaling carries information indicating an arbitrarily selected downlink component carrier n for sending a random access response in the information field.

[0050] If the eNB has downlink data to send to the UE, but the non-contention random access caused by the UE cannot be directly scheduled due to reasons such as the UE is o...

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Abstract

The invention provides a method, a base station (eNB) and a user terminal (UE) for sending a random access response, wherein the method comprises the following step that: after receiving a non-competition random access request of the UE on an uplink member carrier, according to a preset carrier strategy, the eNB sends the random access response to the UE on one downlink member carrier supported by the UE. Compared with the traditional method in which the eNB sends the random access response to all downlink member carriers supported by the UE, the invention saves more downlink resources. Correspondingly, the UE in the invention only needs to monitor the random access response on one supported downlink member carrier according to the preset carrier strategy without monitoring all downlink member carriers, thereby more saving electric power consumption of the UE.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a method for sending a random access response, a base station and a user terminal (UE). Background technique [0002] Compared with the Long Term Evolution (LTE) system, the Long Term Evolution-Advanced (LTE-A) system has a greatly improved peak rate. In order to improve the peak rate and system throughput, the LTE-A system introduces Carrier Aggregation (CA, Carrier Aggregation) technology, that is, the uplink and downlink in a cell can each contain multiple component carriers to provide services for the same UE. Among them, the LTE-A The maximum bandwidth of each component carrier in system A is 20 MHz, and the bandwidth of each component carrier may be the same or different. [0003] The CA technology of the LTE-A system allows uplink and downlink bandwidth asymmetry. The throughput required by the downlink service is usually greater than that required by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08H04W88/02H04W88/08
CPCY02B60/50Y02D30/70
Inventor 谌丽房家奕潘学明
Owner DATANG MOBILE COMM EQUIP CO LTD
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