Enhanced PDSCH operation
An enhanced data transmission operation is disclosed in which PDSCH and/or EPDCCH may be transmitted in the first symbol either with or without legacy control information multiplexed with the data transmissions. Base stations operating according to the various aspects may transmit indicators to related mobile devices that identify when such PDSCH/EPDCCH are transmitted in the first symbol period. UEs receive the multiplexed data transmissions and decode the appropriate PDSCH/EPDCCH transmissions along with any multiplexed legacy control information.
1. A method of wireless communication, comprising:
receiving a transmission from a base station at a mobile device; and
decoding the transmission, wherein the transmission includes a data transmission in at least a first symbol of a subframe from a base station, wherein the first symbol is an initial subframe symbol at a beginning of the subframe, and the data transmission is multiplexed with legacy control transmissions in at least the first symbol.
2. The method of claim 1 , wherein the first symbol includes legacy control information; and
wherein the multiplexing of the data transmission with the legacy control transmissions comprises multiplexing the legacy control information in at least the first symbol with at least one of:
a physical downlink shared channel (PDSCH), or
an enhanced physical downlink control channel (EPDCCH).
3. The method of claim 1 , further comprising:
receiving an indication from the base station, wherein the indication identifies that the data transmission is sent in at least the first symbol of the subframe.
4. The method of claim 3 , wherein the receiving the indication occurs one of:
semi-statically;
dynamically; or
as a combination thereof.
5. The method of claim 1 , wherein generation of the multiplexed legacy control transmissions with the data transmission is performed only for unicast data transmissions.
6. The method of claim 1 , wherein the legacy control transmissions comprise at least one of:
a physical control format indicator channel (PCFICH),
a physical hybrid automatic repeat request indicator channel (PHICH), or
a physical downlink control channel (PDCCH).
7. The method of claim 1 , wherein the multiplexing of the legacy control transmissions with the data transmission comprises puncturing one or more resource elements associated with the data transmission in at least the first symbol and scheduling at least a portion of the legacy control transmissions in the one or more punctured resource elements.
8. The method of claim 1 , wherein the multiplexing of the legacy control transmissions with the data transmission comprises rate matching the data transmission around a set of resource elements of at least the first symbol in which for at least a portion of the legacy control transmissions is scheduled.
9. The method of claim 8 , wherein the multiplexing of the legacy control transmissions with the data transmission is performed only for a subset of subframes.
10. A method of wireless communication, comprising:
generating a transmission, wherein the transmission includes a subframe, a first portion of the subframe being allocated for legacy control information, the first portion including at least a first symbol, wherein the first symbol is an initial subframe symbol at a beginning of the subframe;
multiplexing data in at least the first symbol, wherein the data does not include legacy control information; and
sending the transmission from a base station to a mobile device.
11. The method of claim 10 , wherein the first symbol includes legacy control information; and
wherein the multiplexing comprises multiplexing legacy control information in the first symbol with at least one of:
a physical downlink shared channel (PDSCH), or
an enhanced physical downlink control channel (EPDCCH).
12. The method of claim 10 , wherein the transmission includes at least one of:
a physical control format indicator channel (PCFICH),
a physical hybrid automatic repeat request indicator channel (PHICH), or
a physical downlink control channel (PDCCH).
13. The method of claim 10 , wherein the multiplexing comprises:
puncturing one or more resource elements associated with the transmission in at least the first symbol for transmission of at least a portion of the legacy control information.
14. The method of claim 10 , wherein the sending the transmission comprises:
scheduling the data transmission around a set of resource elements of the at least first symbol reserved for at least a portion of the legacy control information.
15. The method of claim 14 , wherein a reservation is performed only for a subset of subframes.
16. The method of claim 10 , further comprising:
transmitting, by the base station, an indication to the mobile device, wherein the indication identifies that the data transmission is sent in the first symbol of the subframe.
17. An apparatus configured for wireless communication, the apparatus comprising:
at least one processor; and
a memory coupled to the at least one processor,
wherein the at least one processor is configured:
to receive a transmission from a base station at a mobile device; and
to decode the transmission, wherein the transmission includes data transmission in at least a first symbol of a subframe from a base station, wherein the first symbol is an initial subframe symbol at a beginning of the subframe, and the data transmission is multiplexed with legacy control transmissions in at least the first symbol.
18. The apparatus of claim 17 , wherein the first symbol includes legacy control information; and
wherein the multiplexing of the data transmission with the legacy control transmissions comprises multiplexing the legacy control information in at least the first symbol with at least one of:
a physical downlink shared channel (PDSCH), or
an enhanced physical downlink control channel (EPDCCH).
19. The apparatus of claim 17 , further comprising configuration of the at least one processor to receive an indication from the base station, wherein the indication identifies that the data transmission is sent in at least the first symbol of the subframe.
20. The apparatus of claim 19 , wherein the configuration of the at least one processor to receive the indication occurs one of:
semi-statically;
dynamically; or
as a combination thereof.
21. The apparatus of claim 17 , wherein generation of the multiplexed legacy control transmissions with the data transmission is performed only for unicast data transmissions.
22. The apparatus of claim 17 , wherein the legacy control transmissions comprise at least one of:
a physical control format indicator channel (PCFICH),
a physical hybrid automatic repeat request indicator channel (PHICH), or
a physical downlink control channel (PDCCH).
23. The apparatus of claim 17 , wherein the multiplexing of the legacy control transmissions with the data transmission comprises puncturing one or more resource elements associated with the data transmission in at least the first symbol and scheduling at least a portion of the legacy control transmissions in the one or more punctured resource elements.
24. The apparatus of claim 17 , wherein the multiplexing of the legacy control transmissions with the data transmission comprises rate matching the data transmission around a set of resource elements of at least the first symbol in which for at least a portion of the legacy control transmissions is scheduled.
25. The apparatus of claim 24 , wherein the multiplexing of the legacy control transmissions with the data transmission is performed only for a subset of subframes.
26. An apparatus configured for wireless communication, the apparatus comprising:
at least one processor; and
a memory coupled to the at least one processor,
wherein the at least one processor is configured:
to generate a transmission, wherein the transmission includes a subframe, a first portion of the subframe being allocated for legacy control information, the first portion including at least a first symbol of the subframe, wherein the first symbol is an initial subframe symbol at a beginning of the subframe;
to multiplex data in at least the first symbol, wherein the data does not include legacy control information; and
to send the transmission from a base station to a mobile device.
27. The apparatus of claim 26 , wherein the first symbol includes legacy control information; and
wherein the configuration of the at least one processor to multiplex comprises configuration to multiplex legacy control information in the first symbol with at least one of:
a physical downlink shared channel (PDSCH), or
an enhanced physical downlink control channel (EPDCCH).
28. The apparatus of claim 26 , wherein the configuration of the at least one processor to multiplex comprises configuration to puncture one or more resource elements associated with the transmission in at least the first symbol for transmission of at least a portion of the legacy control information.
29. The apparatus of claim 26 , wherein the configuration of the at least one processor to send the transmission comprises configuration to schedule the transmission around a set of resource elements of the at least first symbol reserved for at least a portion of the legacy control information.
30. The apparatus of claim 26 , further comprising configuration of the at least one processor to transmit, by the base station, an indication to the mobile device, wherein the indication identifies that the transmission is sent in the first symbol of the subframe.