Abstract
Methods and apparatus are described for providing compatible mapping for backhaul control channels, frequency first mapping of control channel elements (CCEs) to avoid relay-physical control format indicator channel (R-PCFICH) and a tree based relay resource allocation to minimize the resource allocation map bits. Methods and apparatus (e.g., relay node (RN)/evolved Node-B (eNB)) for mapping of the Un downlink (DL) control signals, Un DL positive acknowledgement (ACK)/negative acknowledgement (NACK), and/or relay-physical downlink control channel (R-PDCCH) (or similar) in the eNB to RN (Un interface) DL direction are described. This includes time/frequency mapping of above-mentioned control signals into resource blocks (RBs) of multimedia broadcast multicast services (MBMS) single frequency network (MBSFN)-reserved sub-frames in the RN cell and encoding procedures for these. Also described are methods and apparatus for optimizing signaling overheads by avoiding R-PCFICH and minimizing bits needs for resource allocation.
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Technologies
Broadcast/Multicast
Product
Use Cases
Wireless communication
Services
Claim
1-20. (canceled)
21. A method implemented in an evolved Node B (eNB) for transmitting a relay physical downlink control channel (R-PDCCH) to a relay node (RN), the method comprising:
coding a plurality of relay physical downlink control channel (R-PDCCH) bits associated with an R-PDCCH transmission, wherein the plurality of R-PDCCH bits are mapped first along a frequency domain of an orthogonal frequency division multiplexing (OFDM) symbol and second in a time domain across multiple OFDM symbols; and transmit the R-PDCCH transmission to the RN, wherein the R-PDCCH transmission is mapped to a set of resource blocks (RBs) and spans multiple OFDM symbols, wherein the R-PDCCH transmission is transmitted in a subframe that is a multimedia broadcast multicast services (MBMS) single frequency network (MBSFN) subframe.
22. The method of claim 21, wherein the set of RBs are predetermined, wherein the predetermined number of RBs is indicated in a radio resource control (RRC) message.
23. The method of claim 21, wherein the R-PDCCH transmission indicates a downlink resource assignment is included in subframe containing the R-PDCCH transmission.
24. The method of claim 21, wherein the R-PDCCH transmission begins at a starting OFDM symbol and is transmitted on a subset of the OFDM symbols included in the subframe containing the R-PDCCH transmission.
25. The method of claim 24, wherein the starting OFDM symbol is not the first OFDM symbol of the subframe including the R-PDCCH transmission.
26. The method of claim 21, wherein the R-PDCCH bits are coded per OFDM symbol basis.
27. The method of claim 21, wherein resource block (RB) allocations of the R-PDCCH are at least one of a resource allocation type 0, a resource allocation type 1, or a resource allocation type 2.
28. The method of claim 21, wherein R-PDCCH occupies resource elements (REs) that otherwise would be used for a physical downlink control channel (PDSCH).
29. The method of claim 21, wherein the R-PDCCH starts in an OFDM symbol enabling the RN to decode downlink assignments immediately after a first slot of the subframe.
30. The method of claim 21, wherein the R-PDCCH carries an uplink (UL) grant.
31. An evolved Node B (eNB) comprising:
a processor configured to at least:
code a plurality of relay physical downlink control channel (R-PDCCH) bits associated with an R-PDCCH transmission, wherein the plurality of R-PDCCH bits are mapped first along a frequency domain of an orthogonal frequency division multiplexing (OFDM) symbol and second in a time domain across multiple OFDM symbols; and
transmit the R-PDCCH transmission to a relay node (RN), wherein the R-PDCCH transmission is mapped to a set of resource blocks (RBs) and spans multiple OFDM symbols, wherein the R-PDCCH transmission is transmitted in a subframe that is a multimedia broadcast multicast services (MBMS) single frequency network (MBSFN) subframe.
32. The eNB of claim 31, wherein the set of RBs are predetermined, wherein the predetermined number of RBs is indicated in a radio resource control (RRC) message.
33. The eNB of claim 31, wherein the R-PDCCH bits are to be coded per OFDM symbol basis.
34. The eNB of claim 31, wherein resource block (RB) allocations of the R-PDCCH are at least one of a resource allocation type 0, a resource allocation type 1, or a resource allocation type 2.
35. The eNB of claim 31, wherein the R-PDCCH transmission indicates a downlink resource assignment is included in subframe containing the R-PDCCH transmission.
36. The eNB of claim 31, wherein the R-PDCCH transmission begins at a starting OFDM symbol and is transmitted on a subset of the OFDM symbols included in the subframe containing the R-PDCCH transmission.
37. The eNB of claim 36, wherein the starting OFDM symbol is not the first OFDM symbol of the subframe including the R-PDCCH transmission.
38. The eNB of claim 31, wherein resource block (RB) allocations of the R-PDCCH are at least one of a resource allocation type 0, a resource allocation type 1, or a resource allocation type 2.
39. The eNB of claim 31, wherein R-PDCCH occupies resource elements (REs) that otherwise would be used for a physical downlink control channel (PDSCH).
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.