Apparatus and/or method for providing epdcch in multi-carrier based and/or quasi-aligned network
A special subframe configuration and resource technology, which is applied to the separation device of the transmission path, the multiple use of the transmission path, and the transmission monitoring, etc., which can solve the problems such as the inability to provide reference symbols and the inability to provide PUCCH resource allocation.
Active Publication Date: 2017-09-08
INTERDIGITAL PATENT HLDG INC
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Problems solved by technology
Unfortunately, such communication systems may provide ePDCCH designs that may be dedicated to a single component carrier (e.g., instead of multiple component carriers and / or multiple antennas) and / or may not be suitable for supporting quasi-aligned antenna ports, thus in multicarrier systems may be limited in performance and / or may not be adequately designed to avoid errors in frames and / or subframes (e.g., special subframes), may have tighter PDSCH and / or CSI reporting processing times, cannot Provides proper PUCCH resource allocation, cannot provide PDCCH indication during configuration and / or reference symbols quasi-aligned with antenna ports cannot be provided for long enough to be used by ePDCCH and / or its decoding
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[0246] In addition, according to an exemplary embodiment, if the ePDCCH common search space can be monitored together with the ePDCCH WTRU or UE specific search space in a subframe, one or more of the following may be applied and / or may be provided and / or used. For example, the ePDCCH WTRU or UE specific search space start symbol may be the same as the ePDCCH common search space start symbol. Moreover, the ePDCCH WTRU or UE specific search space start symbol can be configured as a function of the CFI value in the PCFICH and the ePDCCH common search space start symbol. The ePDCCH WTRU or UE-specific search space start symbol can be independently configured via higher layer signaling regardless of the ePDCCH common search space start symbol. Furthermore, in one embodiment, the ePDCCH WTRU or UE-specific search space start symbol may be configured according to the transmission mode configured for the WTRU or UE. For example, based on the transmission mode and / or DCI format, the W...
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One ePDCCH may be provided. For example, a WTRU may receive a configuration for monitoring ePDCCH resources. Based on this configuration, the WTRU may be configured to monitor and may monitor ePDCCH resources on specific subframes. Additionally, the WTRU may obtain the aggregation level for the subframe associated with the aggregation level number NAL. The WTRU may transmit or monitor the ePDCCH using the aggregation level associated with the NAL of the subframe. The WTRU may also receive a reference signal. The WTRU may then determine the type of reference signal received. The WTRU may perform demodulation of the PDSCH or ePDCCH using demodulation timing based on the determined type. The ePDCCH or PDSCH may also be monitored or received by implicitly identifying demodulation reference timing based on the location of one or more ePDCCH resources where the WTRU may receive DCI.
Description
[0001] Cross references to related applications [0002] This application requires U.S. Provisional Patent Application No. 61 / 591,508 filed on January 27, 2012; No. 61 / 612,834 filed on March 19, 2012; No. 61 / 688,164 filed on May 9, 2012; 2012 No. 61 / 644,972 filed on May 9, 2012; No. 61 / 678,612 filed on August 1, 2012; No. 61 / 706,119 filed on September 26, 2012; 61 filed on October 31, 2012 / 720,646; and the rights and interests of 61 / 753,279 filed on January 16, 2013, the contents of which are incorporated herein by reference. Background technique [0003] Current communication systems (for example, LTE / Advanced LTE systems) can provide multiple antennas, multiple component carriers, and / or quasi-calibrated antenna ports to support transmission. Such multiple antennas, multiple component carriers, and / or quasi-calibrated antenna ports can be provided for various purposes, including peak system throughput enhancement, extended cell coverage, higher Doppler support, etc. Unfortunat...
Claims
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IPC IPC(8): H04L5/00
CPCH04L5/0053H04L5/001H04L5/0023H04L5/0051H04L5/0094H04L5/023H04W72/0446H04B17/373H04B17/382H04W72/232H04W72/0453H04W72/04
Inventor M-I·李章修谷辛颂尧J·A·斯特恩-波科维茨M·鲁道夫郗风君A·基尼S·M·侯赛尼安P·马里内尔
Owner INTERDIGITAL PATENT HLDG INC