EXTENDING PHYSICAL DOWNLINK CONTROL CHANNELS
First Claim
1. A method for extending a Physical Downlink Control CHannel (PDCCH) region in a single cell to provide Downlink Control Information (DCI) to a User Equipment (UE) in order to enable communication over a plurality of cells in a communication system wherein the UE receives DCI from a Node B through a DCI format transmitted over a PDCCH and wherein the PDCCH is transmitted through Control Channel Elements (CCEs) in a UE-Common Search Space (UE-CSS) or in a UE-Dedicated Search Space (UE-DSS), the method comprising the steps of:
- transmitting, by the Node B, PDCCHs in a UE-CSS; and
transmitting, by the Node B, PDCCHs in a plurality of UE-DSSs,wherein the UE-CSS is common to the plurality of cells, andwherein the plurality of UE-DSSs correspond to the plurality of cells, respectively.
1 Assignment
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Accused Products
Abstract
Methods and apparatus for transmitting and receiving Downlink Control Information (DCI) in a single cell in order to support communication over multiple cells. The DCI is conveyed by DCI formats transmitted through Physical Downlink Control CHannels (PDCCHs) in a UE-Common Search Space (UE-CSS) and in a UE-Dedicated Search Space (UE-DSS). A distinct UE-DSS is defined in the single cell for each of the multiple cells. Each distinct UE-DSS has the same structure as a conventional UE-DSS and a location that is determined by the same parameters as the location of the conventional UE-DSS and by the respective cell identity (Cell_ID).
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Citations
21 Claims
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1. A method for extending a Physical Downlink Control CHannel (PDCCH) region in a single cell to provide Downlink Control Information (DCI) to a User Equipment (UE) in order to enable communication over a plurality of cells in a communication system wherein the UE receives DCI from a Node B through a DCI format transmitted over a PDCCH and wherein the PDCCH is transmitted through Control Channel Elements (CCEs) in a UE-Common Search Space (UE-CSS) or in a UE-Dedicated Search Space (UE-DSS), the method comprising the steps of:
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transmitting, by the Node B, PDCCHs in a UE-CSS; and transmitting, by the Node B, PDCCHs in a plurality of UE-DSSs, wherein the UE-CSS is common to the plurality of cells, and wherein the plurality of UE-DSSs correspond to the plurality of cells, respectively. - View Dependent Claims (2, 3, 4)
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5. A method for extending a Physical Downlink Control CHannel (PDCCH) region in a single cell to provide Downlink Control Information (DCI) to a User Equipment (UE) in order to enable communication over a plurality of cells in a communication system wherein the UE receives DCI from a Node B through a DCI format transmitted over a PDCCH and wherein the PDCCH is transmitted through Control Channel Elements (CCEs) in a UE-Common Search Space (UE-CSS) or in a UE-Dedicated Search Space (UE-DSS), the method comprising the steps of:
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informing the UE, by the Node B, of a Cell Identity (Cell_ID) for each of the plurality of cells; defining a plurality of UE-DSSs corresponding to the plurality of cells, respectively, wherein each of the plurality of UE-DSSs is identified by parameters of the UE-DSS for the single cell and by the Cell_ID of a corresponding cell; and transmitting a plurality of PDCCHs in the plurality of UE-DSSs. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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13. A User Equipment (UE) apparatus for receiving Downlink Control Information (DCI) in DCI formats transmitted from a Node B over Physical Downlink Control CHannels (PDCCHs) in a single cell, the DCI enabling communication over a plurality of cells, wherein a PDCCH is transmitted through Control Channel Elements (CCEs) in a UE-Common Search Space (UE-CSS) or in a UE-Dedicated Search Space (UE-DSS), the UE apparatus comprising:
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a CCE identification unit for identifying CCEs in the UE-CSS and the UE-DSS; and a receiver for receiving PDCCHs in the UE-CSS of the single cell and in a plurality of UE-DSSs, wherein the plurality of UE-DSSs corresponds to the plurality of cells, respectively. - View Dependent Claims (14, 15, 16)
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17. A User Equipment (UE) apparatus for receiving Downlink Control Information (DCI) in DCI formats transmitted from a Node B over Physical Downlink Control CHannels (PDCCHs) in a single cell, the DCI enabling communication over a plurality of cells, wherein a PDCCH is transmitted through Control Channel Elements (CCEs) in a UE-Common Search Space (UE-CSS) or in a UE-Dedicated Search Space (UE-DSS), the UE apparatus comprising of:
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a receiver for receiving a Cell Identity (Cell_ID) for each of the plurality of cells transmitted by the Node B; and a CCE identification unit for identifying CCEs in the UE-CSS and the UE-DSS; and a receiver for receiving PDCCHs in the UE-CSS of the single cell and in a plurality of UE-DSSs corresponding to the plurality of cells, respectively, wherein each of the plurality of UE-DSSs is identified by parameters of a UE-DSS for a single cell and by a Cell_ID of a corresponding cell. - View Dependent Claims (18, 19, 20, 21)
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Specification