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Method for initiating random access, notification of random access resources, and primary base station

A random access and physical random access technology, applied in wireless communication, electrical components, etc., can solve the problems of many competing RAs, increasing the probability of RA collision, and consuming system resources, and achieve the effect of preventing competing random access.

Active Publication Date: 2016-12-14
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, in the above scheme, due to competing RAs, the preamble code (preambl) in its message 1 (msg1) is selected by the UE itself, and other UEs may send the same preamble code at the same time, resulting in conflict
Therefore, the above solution will lead to too many competing RAs, resulting in an increase in the probability of RA conflicts and unnecessary consumption of system resources.

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  • Method for initiating random access, notification of random access resources, and primary base station
  • Method for initiating random access, notification of random access resources, and primary base station
  • Method for initiating random access, notification of random access resources, and primary base station

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Embodiment Construction

[0036] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0037] In the embodiment of the present invention, the primary base station instructs the user equipment or the secondary base station to initiate random access through the second notification message, or sends resources for random access, or allocates resources for data transmission to realize the transmission of downlink data or uplink data, thereby avoiding It enables the user equipment to monitor the physical downlink control channel order PDCCH order on each base station eNB participating in the aggregated carrier, or prevents the user equipment from initiating contentious random access.

[0038] In each subframe in the LTE system, it must be ensured that the data transmitted by all UEs in the same cell arrives at the eNB at the same time, otherwise interference will be caused. Since the distances between each UE ...

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Abstract

The embodiments of the present invention relate to a notification method of random access initiation, a notification method of random access resources, a notification method of data transmission resources, and a master base station. The notification method initiated by the random access includes: the main base station receiving a first notification message from the source device, the first notification message indicating the data to be transmitted by the source device to the destination device; The device sends a second notification message, where the second notification message instructs the destination device to initiate random access to the source device. The embodiment of the present invention prevents the user equipment from monitoring the instruction of the physical downlink control channel on each base station.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to a method for notifying initiation of random access, a method for notifying random access resources, a method for notifying data transmission resources and a main base station. Background technique [0002] With the development of the mobile communication system, in the mobile communication system, for example, a long term evolution (Long termevolution, LTE for short) system, a carrier aggregation (Carrier Aggregation, CA for short) technology is introduced. Carrier aggregation means that a user equipment (User Equipment, UE for short) can simultaneously use multiple component carriers (Component Carrier, CC for short) for uplink and downlink communication, thereby supporting higher-speed data transmission. According to the base station to which the aggregated carrier belongs, the carrier aggregation can be divided into intra-base station cell aggregation, inter-base st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W68/00H04W74/08
Inventor 黄曲芳曾清海
Owner HUAWEI TECH CO LTD