Techniques and configurations associated with machine type communication in enhanced coverage mode
Embodiments of the present disclosure describe systems and methods for enhanced coverage machine type communication (MTC). Various embodiments may include systems and methods for scheduling a starting subframe, timing sequence, or resource for various transmissions with repetition to achieve a coverage extension target for MTC. Other embodiments may be described and/or claimed.
1. A user equipment (UE) comprising:
transceiver circuitry to:
transmit, to an evolved node B (eNB), data in a first bundle of repeated Physical Uplink Shared Channel (PUSCH) transmissions; and
receive, from the eNB, a Hybrid Automatic Repeat reQuest (HARQ) negative-acknowledgement (NACK) in a Physical Downlink Control Channel (PDCCH) transmission, wherein the HARQ NACK from the eNB to the UE in response to the data in the first bundle of repeated PUSCH transmissions is received multiple times at a predefined or configured level of repetition across a plurality of subframes of the PDCCH transmission; and
logic circuitry coupled with the transceiver circuitry, the logic circuitry to determine an uplink starting subframe, based on the predefined or configured level of repetition, at which to begin retransmission of the data in a second PUSCH transmission in response to the HARQ NACK, and further to determine a downlink starting subframe at which to begin receipt of the PDCCH transmission of HARQ NACK for multiple times, based on a last subframe of the first bundle of repeated PUSCH transmissions.
2. The UE of claim 1 , wherein the downlink starting subframe is:
four subframes after the last subframe of the first bundle of repeated PUSCH transmission for frequency division duplex (FDD); or
k1 subframes after the last subframe of the first PUSCH transmission for time division duplex (TDD), wherein k1 is selected in conjunction with a TDD uplink/downlink (UL/DL) configuration and a subframe index n in accordance with the following table:
TDD UL/DL
subframe index n
Configuration
0
1
2
3
4
5
6
7
8
9
0
4
7
6
4
7
6
1
4
6
4
6
2
6
6
3
6
6
6
4
6
6
5
6
6
4
6
6
4
7.
3. The UE of claim 1 , wherein the uplink starting subframe is:
four subframes after the last subframe of the PDCCH transmission for frequency division duplex (FDD); or
k2 subframes after the last subframe of a downlink transmission for time division duplex (TDD), wherein k2 is selected in conjunction with a TDD uplink/downlink (UL/DL) configuration and a subframe number n in accordance with the following table:
TDD UL/DL
subframe number n
Configuration
0
1
2
3
4
5
6
7
8
9
0
4
6
4
6
1
6
4
6
4
2
4
4
3
4
4
4
4
4
4
5
4
6
7
7
7
7
5.
4. The UE of claim 1 , wherein the transceiver circuitry is further to receive a Physical HARQ Indicator Channel (PHICH) transmission of HARQ NACK in addition to the Physical Downlink Control Channel (PDCCH) transmission of HARQ NACK, and the logic circuitry is to determine the uplink starting subframe of the second PUSCH transmission based on a last subframe of the PHICH transmission and the PDCCH transmission.
5. The UE of claim 4 , wherein the uplink starting subframe is four subframes after the last subframe of a downlink transmission for frequency division duplex (FDD).
6. The UE of claim 4 , wherein the uplink starting subframe is k2 subframes after the last subframe of the downlink transmission for time division duplex (TDD), wherein k2 is selected in conjunction with a TDD uplink/downlink (UL/DL) configuration and a DL subframe number n in accordance with the following table:
TDD UL/DL
subframe number n
Configuration
0
1
2
3
4
5
6
7
8
9
0
4
6
4
6
1
6
4
6
4
2
4
4
3
4
4
4
4
4
4
5
4
6
7
7
7
7
5.
7. The UE of claim 1 , wherein the UE is a machine type communication (MTC) UE to be operated in an enhanced coverage mode, and wherein the predefined or configured level of repetition is based on an enhanced coverage requirement associated with a downlink transmission.
8. The UE of claim 7 , wherein the predefined or configured level of repetition is further based on an enhanced coverage requirement associated with the MTC UE.