Narrow-band broadcast/multi-cast design
NB wireless communication involves numerous challenges. A limited frequency dimension may need to be shared by multiple users. At times, large data transmissions, including multiple TBs of data may be transmitted using NB communication, and it may be important that each TB be successfully received by the users. The apparatus may transmit data comprising a plurality of TBs in a narrow band communications system, including repeating a transmission of the plurality of TBs, using any of a number of repetition patterns. The apparatus may use error correction encoding across multiple TBs. The transmission may be a single cell transmission or a multi-cell transmission.
1. A method of wireless communication, comprising:
transmitting a data transmission comprising a plurality of transport blocks (TBs) in a narrow band (NB) communications system, including:
repeating transmission of the plurality of TBs comprised in the data transmission using a repetition pattern, wherein repeating the transmission of the plurality of TBs comprised in the data transmission includes:
transmitting the data transmission using at least one of a first pattern and a second pattern,
wherein the first pattern includes all of the plurality of TBs comprised in the data transmission without repetition for a first time, and
wherein the second pattern includes at least one repetition of a first TB from the plurality of TBs, wherein the at least one repetition of the first TB is prior to a repetition of a second TB from the plurality of TBs.
2. The method of claim 1 , wherein the data transmission is broadcast or multicast.
3. The method of claim 1 , further comprising:
encoding the plurality of TBs of the data transmission using error coding across multiple TBs of the data transmission.
4. The method of claim 1 , wherein the transmission of the data transmission and the repeated transmission of the plurality of TBs are transmitted from a single base station.
5. The method of claim 4 , wherein transmission of the data transmission and the repeated transmission of the plurality of TBs are transmitted on a physical Downlink Shared Channel (PDSCH).
6. The method of claim 1 , wherein the transmission of the data transmission and the repeated transmission of the plurality of TBs comprised in the data transmission are multi-cast from multiple base stations.
7. The method of claim 6 , wherein the data transmission and the repeated transmission of the plurality of TBs comprised in the data transmission are transmitted on a Physical Multi-Cast Channel (PMCH).
8. The method of claim 6 , wherein the data transmission and the repeated transmission of the plurality of TBs are made within a Narrow Band Multimedia Broadcast Single Frequency Network (NB-MBSFN) region of an NB-MBSFN subframe.
9. The method of claim 8 , wherein the transmissions are performed in a frame that includes ECP for frames on which the plurality of TBs are transmitted and NCP on other frames.
10. The method of claim 8 , wherein when a wideband system comprises ECP, the NB-MBSFN region is a sub-band of an entire bandwidth in NB-MBSFN subframes, and when the wideband system comprises NCP, the NB-MBSFN region occupies the entire bandwidth of the NB-MBSFN subframe.
11. The method of claim 1 , further comprising:
signaling configuration information indicating a transmission structure and a time, frequency resource used for the plurality of TBs.
12. The method of claim 11 , wherein the configuration information is signaled using a System Information Block (SIB), and, wherein the configuration information comprises at least one of:
a time for a broadcast transmission of the data transmission;
a TB size;
a number of TBs comprised in the data transmission;
a repetition factor of each of the plurality of TBs of the data transmission;
a repetition factor of the data transmission;
a repetition pattern for the plurality of TBs of the data transmission;
a number of resource blocks used for the data transmission;
an indication of an intended UE coverage level for a corresponding pattern.
13. The method of claim 1 , wherein the transmitting and the repeating are performed at a base station, and further comprising:
transmitting, by a user equipment (UE) to a base station, a ready indication using the NB and indicating that the UE is ready to receive a data transmission from the base station; and
receiving, at the UE, the data transmission including the plurality of TBs, in response to the ready indication.
14. The method of claim 1 , wherein the first pattern includes all of the plurality of TBs comprised in the data transmission at least a second time following transmission the plurality of TBs comprised in the data transmission without repetition for the first time.
15. A method of wireless communication, comprising:
transmitting a data transmission comprising a plurality of transport blocks (TBs) in a narrow band (NB) communications system, including:
repeating transmission of the plurality of TBs comprised in the data transmission using a repetition pattern, wherein repeating the transmission of the plurality of TBs includes:
transmitting the data transmission using at least one of a first pattern and a second pattern,
wherein the first pattern includes all of the plurality of TBs comprised in the data transmission without repetition for a first time, and
wherein the second pattern includes at least one repetition of a first TB from the plurality of TBs comprised in the data transmission, wherein the at least one repetition of the first TB is prior to a repetition of a second TB from the plurality of TBs.
16. The method of claim 15 , wherein the first pattern also comprises all of the plurality of TBs comprised in the data transmission without repetition a second time.
17. The method of claim 15 , wherein repeating the transmission of the plurality of TBs includes:
transmitting the data transmission using both the first pattern and the second pattern.
18. A method of wireless communication, comprising:
transmitting a data transmission comprising a plurality of transport blocks (TBs) in a narrow band (NB) communications system, including:
repeating transmission of the plurality of TBs comprised in the data transmission using a repetition pattern, wherein when multiple resource blocks (RBs) are available for the transmission of the data transmission, the method includes:
transmitting a first TB of the data transmission and at least one repeat of the first TB of the data transmission on a first RB; and
transmitting a second TB of the data transmission and at least one repeat of the second TB of the data transmission on a second RB;
the first RB and the second RB occupying different subbands.
19. The method of claim 18 , wherein the first TB and the second TB are transmitted in a diagonally shifted fashion.
20. A method of wireless communication, comprising:
transmitting a data transmission comprising a plurality of transport blocks (TBs) in a narrow band (NB) communications system, including:
repeating transmission of the plurality of TBs comprised in the data transmission using a repetition pattern, wherein the transmission of the data transmission and the repeated transmission of the data transmission form a data transmission pattern; and
transmitting a repeat of the data transmission a number of times using a repeat of the data transmission pattern, wherein the number of times is based on an estimation of failed TBs for a receiving UE.
21. An apparatus for wireless communication, comprising:
a memory; and
at least one processor coupled to the memory and configured to:
transmit a data transmission comprising a plurality of transport blocks (TBs) in a narrow band communications system, including:
repeat transmission of the plurality of TBs comprised in the data transmission using a repetition pattern including:
transmitting the data transmission using at least one of a first pattern and a second pattern,
wherein the first pattern includes all of the plurality of TBs comprised in the data transmission without repetition for a first time, and
wherein the second pattern includes at least one repetition of a first TB from the plurality of TBs, wherein the at least one repetition of the first TB is prior to a repetition of a second TB from the plurality of TBs.
22. The apparatus of claim 21 , wherein repeating the transmission of the plurality of TBs includes:
transmitting the data transmission using both the first pattern and the second pattern.
23. The apparatus of claim 21 , wherein the at least one processor is further configured to:
encode the plurality of TBs of the data transmission using error coding across multiple TBs of the data transmission.
24. The apparatus of claim 21 , wherein the data transmission and the repeated transmission of the plurality of TBs are transmitted from a single base station.
25. The apparatus of claim 21 , wherein the data transmission and the repeated transmission of the plurality of TBs comprised in the data transmission are multi-cast from multiple base stations.
26. The apparatus of claim 21 , wherein the first pattern includes all of the plurality of TBs comprised in the data transmission at least a second time following transmission the plurality of TBs comprised in the data transmission without repetition for the first time.
27. An apparatus for wireless communication, comprising:
a memory, and
at least one processor coupled to the memory and configured to:
transmit a data transmission comprising a plurality of transport blocks (TBs) in a narrow band (NB) communications system, including:
repeat transmission of the plurality of TBs comprised in the data transmission using a repetition pattern, wherein when multiple resource blocks (RBs) are available for the transmission of the data transmission, the method includes:
transmitting a first TB of the data transmission and at least one repeat of the first TB of the data transmission on a first RB; and
transmitting a second TB of the data transmission and at least one repeat of the second TB of the data transmission on a second RB;
the first RB and the second RB occupying different subbands.
28. An apparatus for wireless communication, comprising:
a memory; and
at least one processor coupled to the memory and configured to:
transmit a data transmission comprising a plurality of transport blocks (TBs) in a narrow band (NB) communications system, including:
repeating transmission of the plurality of TBs comprised in the data transmission using a repetition pattern, wherein the transmission of the data transmission and the repeated transmission of the data transmission form a data transmission pattern; and
transmitting a repeat of the data transmission a number of times using a repeat of the data transmission pattern, wherein the number of times is based on an estimation of failed TBs for a receiving UE.