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Activate component carriers in carrier aggregation

A technology of component carrier and access code, applied in the field of activation/deactivation of component carrier, which can solve the problem of imposing too much delay

Active Publication Date: 2016-11-16
NOKIA TECH OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

RRC signaling is not considered efficient for this purpose as its semi-static nature would impose too much delay, especially given the inherent delay and the introduction due to HARQ and ARQ when activating and / or deactivating any CC time uncertainty

Method used

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  • Activate component carriers in carrier aggregation
  • Activate component carriers in carrier aggregation
  • Activate component carriers in carrier aggregation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] As mentioned above, there is a need for a mechanism (besides RRC signaling) for activating and deactivating individual CCs for UEs, such that there is a relationship between both the eNB and the UE as to whether a particular cell in the CC is available for The response is sufficient and reliable in the sense that the CA and when it is available for the CA "simultaneously" agrees.

[0033] According to an exemplary embodiment of the present invention, a "PDCCH order" is sent from the eNB to the affected UE, which combines the CC activation indication with an indication of the codeword or preamble that will be used to access the newly activated CC. By way of example, the CC activation indication may be a 1-bit field in DCI format 1A (see eg 3GPP TS 36.212 v8.7.05.3.3.1.3 section), modified to accommodate this CC activation indication. By way of example and not limitation, this new DCI format may be referred to as DCI format 1AA, which has the same length as the prior art ...

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Abstract

In an exemplary embodiment, downlink control information DCI is sent to a user equipment UE, the DCI includes an indication of an access codeword and an indication of activation of at least one component carrier CC for the UE, and is received from the UE as having activated at least one component carrier CC for the UE. A CC's confirmed access codeword. The access codeword is received on an uplink channel a) located in at least one activated CC if there is an activated uplink channel in the activated CC, or b) located in at least one activated CC If there is no activated uplink channel in an activated CC, it is a previously activated uplink channel. In another embodiment, DCI including the above two indications is received from the network, the received indication is used to select and access at least one CC; and the activation of the CC is confirmed by sending an access code word.

Description

technical field [0001] The exemplary and non-limiting embodiments of the present invention relate generally to wireless communication systems, methods, devices and computer programs, and more particularly to activation / deactivation of component carriers in systems employing carrier aggregation. Background technique [0002] This section is intended to provide a background or context for the invention recited in the claims. The descriptions herein may include concepts that can be traced back, but not necessarily concepts that have been previously envisioned or traced back. Therefore, unless otherwise indicated herein, what is described in this section is not prior art to the description and claims in this application and is not admitted to be prior art by inclusion in this section. [0003] The following abbreviations that may be found in the specification and / or drawings are defined as follows: [0004] [0005] [0006] In a communication system known as Evolved UTR...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04
CPCH04L1/1607H04L5/0007H04L5/001H04L5/003H04L5/0096H04L5/0098H04W72/0453H04W74/006H04W72/23H04W28/04
Inventor L·达尔斯加德J·奥雅拉J·凯科南M·乔基米斯T·恩托南
Owner NOKIA TECH OY