Wireless communication system with common cell ID
First Claim
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1. An article of manufacture comprising a non-transitory storage medium having instructions stored thereon that, if executed, result in:
- transmitting a physical downlink control channel (PDCCH) in a first region of a physical downlink control channel structure utilized by a remote radio head that has been assigned a cell identifier that is common to one or more other remote radio heads, or base station, or combinations thereof, within the cell;
wherein the PDCCH is modulated with a common scrambling code, and wherein the common scrambling code is common to multiple remote radio heads, or a base station, or combinations thereof, within the cell;
transmitting an enhanced physical downlink control channel (ePDCCH) in a second region of the physical downlink control channel structure;
wherein the ePDCCH is transmitted in a simultaneous transmission mode, and wherein one or more remote radio heads transmits its own control channel in the simultaneous transmission mode on resources common to the one or more remote radio heads using scrambling sequences specific to respective remote radio heads;
modulating demodulation reference signals with a specific scrambling sequence for said transmitting the enhanced physical downlink control channel;
spatially precoding the demodulation reference signals prior to said modulating; and
spatially precoding the enhanced physical downlink channel;
wherein spatial precoding of demodulation reference signals is substantially similar to the spatial precoding of the enhanced physical downlink channel.
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Abstract
Briefly, in accordance with one or more embodiments, a conventional physical downlink control channel (PDCCH) is transmitted in a first region of a physical downlink control channel structure utilized by a remote radio head that has been assigned a cell identifier that is common to one or more other remote radio heads within the cell, and an enhanced physical downlink control channel (ePDCCH) is transmitted in a second region of the physical downlink control channel structure.
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Citations
12 Claims
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1. An article of manufacture comprising a non-transitory storage medium having instructions stored thereon that, if executed, result in:
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transmitting a physical downlink control channel (PDCCH) in a first region of a physical downlink control channel structure utilized by a remote radio head that has been assigned a cell identifier that is common to one or more other remote radio heads, or base station, or combinations thereof, within the cell; wherein the PDCCH is modulated with a common scrambling code, and wherein the common scrambling code is common to multiple remote radio heads, or a base station, or combinations thereof, within the cell; transmitting an enhanced physical downlink control channel (ePDCCH) in a second region of the physical downlink control channel structure; wherein the ePDCCH is transmitted in a simultaneous transmission mode, and wherein one or more remote radio heads transmits its own control channel in the simultaneous transmission mode on resources common to the one or more remote radio heads using scrambling sequences specific to respective remote radio heads; modulating demodulation reference signals with a specific scrambling sequence for said transmitting the enhanced physical downlink control channel; spatially precoding the demodulation reference signals prior to said modulating; and spatially precoding the enhanced physical downlink channel; wherein spatial precoding of demodulation reference signals is substantially similar to the spatial precoding of the enhanced physical downlink channel. - View Dependent Claims (2, 3)
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4. An article of manufacture comprising a non-transitory storage medium having instructions stored thereon that, if executed, result in:
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transmitting a physical hybrid automatic repeat request indicator channel (PHICH) in a first region of a physical downlink control channel structure utilized by a remote radio head that has been assigned a cell identifier that is common to one or more other remote radio heads, or base station, or combinations thereof, within the cell; transmitting an enhanced physical hybrid automatic repeat request indicator channel (ePHICH) in a second region of the physical downlink control channel structure, wherein an ePDCCH is transmitted in the second region in a simultaneous transmission mode, and wherein one or more remote radio heads transmits its own control channel in the simultaneous transmission mode on resources common to the one or more remote radio heads using scrambling sequences specific to a respective remote radio heads; modulating the physical hybrid automatic repeat request indicator channel using a common scrambling code for said transmitting a physical hybrid automatic repeat request indicator channel; and modulating enhanced physical hybrid automatic repeat request indicator channel signals with a specific scrambling sequence for said transmitting the enhanced physical downlink control channel. - View Dependent Claims (5, 6, 7)
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8. An information handling system, comprising:
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a baseband processor coupled to one or more wireless transceivers, wherein the baseband processor is configured to; receive a physical downlink control channel (PDCCH) in a first region of a physical downlink control channel structure utilized by a remote radio head that has been assigned a cell identifier that is common to one or more other remote radio heads within the cell; wherein the PDCCH is modulated with a common scrambling code, and wherein the common scrambling code is common to multiple remote radio heads, or a base station, or combinations thereof, within the cell; and receive an enhanced physical downlink control channel (ePDCCH) in a second region of the physical downlink control channel structure; wherein the ePDCCH is received in a simultaneous transmission mode, and wherein one or more remote radio heads transmits its own control channel in the simultaneous transmission mode on resources common to the one or more remote radio heads using scrambling sequences specific to a respective remote radio heads; demodulate the physical downlink control channel with a common scrambling code used for transmitting the physical downlink control channel; demodulate demodulation reference signals with a specific scrambling sequence used for transmitting the demodulation reference signals; and spatially decode the demodulation reference signals. - View Dependent Claims (9, 10, 11, 12)
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Specification