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Control signaling in LTE carrier aggregation

A control part, aggregation-level technology, applied in the direction of communication between multiple stations, wireless communication, transmission path sub-channel allocation, etc.

Inactive Publication Date: 2014-08-27
INTERDIGITAL PATENT HLDG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PDCCH congestion / blocking can occur in the system

Method used

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  • Control signaling in LTE carrier aggregation
  • Control signaling in LTE carrier aggregation
  • Control signaling in LTE carrier aggregation

Examples

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Embodiment Construction

[0044] Figure 1Ais an illustration of an example communication system 100 in which one or more disclosed embodiments may be implemented. Communication system 100 may be a multiple access system that provides content, such as voice, data, video, messaging, broadcast, etc., to multiple wireless users. Communication system 100 may enable multiple wireless users to access such content by sharing system resources, including wireless bandwidth. For example, communication system 100 may employ one or more channel access methods such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal FDMA (OFDMA), Single Carrier FDMA (SC-FDMA), etc.

[0045] Such as Figure 1A As shown, communication system 100 may include wireless transmit / receive units (WTRUs) 102a, 102b, 102c, 102d (which may generally or collectively be referred to as WTRUs 102), radio access networks (RANs) 103 / 104 / 105, core network 106 / 107 / 109, ...

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Abstract

Cross-carrier scheduling by sending resource assignment of resources for a Secondary Component carrier, SCC, on the data portion (i.e. on the Physical Downlink Shared Channel, PDSCH) of the PDCCH sent on the Primary Component Carrier, PCC, to the UE. Problem: for reliable Physical Downlink Control Channel, PDCCH, operation, cross-carrier scheduling may be used from the primary cell (primary complement carrier, PCC) to allocate resources for the supplementary complement carrier, SuppCC. However, PDCCH congestion or blocking at the PDCCH may occur. Solution: sending the allocation of resources for the secondary CC, SuppCC, at the data portion (i.e. at the PDSCH part) of the primary complement carrier, PCC. Additional embodiments: blind decoding control information (PDCCH) based on downlink control information, DCI, format type. Search space reconfiguration. Determining physical resource blocks, PRB, allocated to a supplementary component carrier. Reading PDCCH on a supplementary component carrier. Configuring PDCCH. Aggregation level mode change: change an aggregation level mode from a first to a second order.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Patent Application No. 61 / 579,645, filed December 22, 2011, the contents of which are hereby incorporated by reference. Background technique [0003] Due to the switch from analog to digital TV transmission, for example in the 470-862 MHz band, some parts of the spectrum may no longer be used for TV transmission, although the exact frequency of the unused spectrum may vary by location. These unused portions of the spectrum may be referred to as TV White Spaces (TVWS). The Federal Communications Commission (FCC) has opened up these TVWS frequencies for various unlicensed uses. These frequencies may be exploited by secondary users for arbitrary radio communications, and such frequencies may be used by LTE and other cellular technologies. Long Term Evolution (LTE) may also use other unlicensed bands, such as the Industrial, Scientific and Medical (ISM) band. [0004] ...

Claims

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Application Information

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IPC IPC(8): H04W72/04
CPCH04L5/0007H04W16/14H04W72/042H04L5/0092H04W72/04H04W72/23H04B7/26H04W72/00H04W72/20H04L5/0041
Inventor M·弗雷达J-L·格鲁M·C·贝卢里R·迪吉罗拉墨Y·戴
Owner INTERDIGITAL PATENT HLDG INC
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