Implementation method of random access of carrier aggregation enhancement

A technology of random access and carrier aggregation, applied in electrical components, wireless communication, etc., can solve problems such as large impact of standards, inability to know, and inability to determine operations, and achieve the effect of solving UE conflicts and delay problems

Active Publication Date: 2013-05-08
POTEVIO INFORMATION TECH
View PDF3 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the UE is still required to perform contention mode random access according to the existing technology, the impact on the standard is too great
In addition, the network cannot know from which UE the random access process comes from by receiving the randomly selected common preamble sent on the PRACH, so it cannot decide the next operation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Implementation method of random access of carrier aggregation enhancement
  • Implementation method of random access of carrier aggregation enhancement
  • Implementation method of random access of carrier aggregation enhancement

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0067] The first embodiment: if the system supports the UE to search the common search space of the SCell, a method of extending the RA-RNTI scrambling PDCCH is introduced to indicate the resource location of the random access response message, and the specific design is as follows:

[0068] The random access signaling flow proposed by the first embodiment of the present invention is as follows: Figure 4a As shown, the network side includes cell 1, cell 2 and cell 3, cell 1 schedules cell 2 and cell 3, and cell 2 performs PRACH transmission.

[0069] The process includes the following steps:

[0070] Step 401a: The network side selects an SCell for random access for the UE according to the dedicated preamble resources and / or load conditions, and the network side sends a random access preamble assignment to the UE through a PDCCH command on the scheduling cell of the selected SCell Message (RA Preamble assignment) (Msg0). Msg0 carries the preamble index (Preamble index) and ...

no. 2 example

[0078] Second embodiment: If the system does not support the UE to search for the common search space of the SCell, the method of scrambling the PDCCH with the C-RNTI is used to indicate the resource location of the PDSCH transmission carrying the corresponding TA information, as follows:

[0079] The random access signaling process proposed by the second embodiment of the present invention is as follows: Figure 4b As shown, the network side includes cell 1, cell 2 and cell 3, cell 1 schedules cell 2 and cell 3, and cell 2 performs PRACH transmission.

[0080] The process includes the following steps:

[0081] Step 401b: The network side selects an SCell for random access for the UE according to the dedicated preamble resources and / or load conditions, and the network side sends a random access preamble assignment to the UE through a PDCCH command on the scheduling cell of the selected SCell Message (RA Preamble assignment) (Msg0). Msg0 carries the preamble index (Preamble i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides an implementation method of random access of carrier aggregation enhancement. The implementation method of the random access of the carrier aggregation enhancement is applied to the situation that a cell carrying out random access to user equipment (UE) is not a primary service cell (PCell) and comprises the following steps: a network side chooses one secondary service cell (SCell) from a timing advance (TA) group of the UE according to dedicated lead code resources and / or load conditions, the network side indicates the lead code used by the UE to carry out random access and physical random access channel (PRACH) resource through physical downlink control channel (PDCCH) instructions on the chosen SCell scheduling cell, the UE transmits a specified lead code on the specified PRACH resources of the networks side, the network side receives the lead code on the specified PRACH resources, and therefore acquires the identifications of the UE, and the network side indicates to transmit the physical downlink shared channel (PDSCH) resource locations of corresponding TA information according to the non-competition mode random access process carried out by the UE.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method for realizing random access in carrier aggregation enhancement. Background technique [0002] Random access technology is an important technology of medium access control in communication system. Random access is the access process of user equipment before starting to communicate with the network. It is mainly used for the establishment and establishment of user initial access, radio resource control (RRC) connection reestablishment, handover, uplink out-of-sync when uplink and downlink data arrives, and positioning. Uplink synchronization of the network. There are mainly two modes of random access. If there is a dedicated preamble, contention-based random access is used, and if there is no dedicated preamble, non-contention-based random access is used. [0003] figure 1 It shows the contention mode random access process in the prior art, which ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04W72/12H04W74/08
Inventor 高兴航潘瑜高伟东林佩
Owner POTEVIO INFORMATION TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap