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Decoding of PCFICH in LTE for power savings and range improvement

專利號
US10034271B2
公開日期
2018-07-24
申請人
Apple Inc.(US CA Cupertino)
發(fā)明人
Tarik Tabet; Konstantinos Sarrigeorgidis; Moustafa M. Elsayed
IPC分類
H04W72/04; H04L5/00; H04B17/336
技術領域
pcfich,ue,cfi,pdcch,decoding,nw,may,cces,wireless,in
地域: CA CA Cupertino

摘要

A mobile device (UE) may decode the Physical Control Format Indicator Channel (PCFICH) blindly, which may include obtaining resource elements (REs) that are reserved for the Physical Downlink Control Channel (PDCCH), based on a largest value of a control format indicator (CFI), finding a total number of control channel elements (CCEs) according to the obtained REs, numbering the CCEs, and decoding the PDCCH for the largest value of the CFI over the numbered CCEs. Accordingly, the UE does not need to decode the PCFICH) specifically. In some cases, the UE may indicate to the network that it is a constrained device, and the network may transmit control information using a reserved CFI value in response to the indication that the UE is a constrained device. The UE may then not decode the PCFICH, and decode the PDCCH based on the PDCCH occupying a first four OFDM symbols.

說明書

As shown, the SOC 300 may be coupled to various other circuits of the UE 106. For example, the UE 106 may include various types of memory (e.g., including NAND flash 310), a connector interface 320 (e.g., for coupling to the computer system), the display 360, and wireless communication circuitry (e.g., for LTE, LTE-A, CDMA2000, Bluetooth, Wi-Fi, GPS, etc.). The UE device 106 may include at least one antenna, and possibly multiple antennas, for performing wireless communication with base stations and/or other devices. For example, the UE device 106 may use antenna 335 to perform the wireless communication. As noted above, the UE may be configured to communicate wirelessly using multiple wireless communication standards in some embodiments.

As described further subsequently herein, the UE 106 (and base station 102) may include hardware and software components for implementing a method for improved decoding of PCFICH. The processor 302 of the UE device 106 may be configured to implement part or all of the methods of improved decoding of PCFICH described herein, e.g., by executing program instructions stored on a memory medium (e.g., a non-transitory computer-readable memory medium). In other embodiments, processor 302 may be configured as a programmable hardware element, such as an FPGA (Field Programmable Gate Array), or as an ASIC (Application Specific Integrated Circuit). Furthermore, processor 302 may be coupled to and/or may interoperate with other components, such as Radio 330, as shown in FIG. 3, to implement improved decoding of PCFICH according to various embodiments disclosed herein.

FIG. 4—Exemplary Block Diagram of a Base Station

權利要求

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