Method and apparatus for design of NR-SS burst set
A method of a user equipment (UE) in a wireless communication system comprises receiving, from a base station (BS), at least one physical broadcasting channel (PBCH) symbol containing resource elements (REs) mapped for at least one demodulation reference signal (DMRS) sequence over a downlink channel; and determining DMRS REs included in the at least one PBCH symbol, wherein a synchronization signal (SS) block hypotheses is carried in the at least one DMRS sequence that is mapped into the DMRS REs, and wherein the SS block hypotheses includes at least full or partial SS block indices.
1. A user equipment (UE) in a wireless communication system, the UE comprising:
a transceiver configured to receive, from a base station (BS) over downlink channels, at least one symbol comprising resource elements (REs) mapped for at least one demodulation reference signal (DMRS) sequence of a physical broadcasting channel (PBCH) and REs mapped for PBCH data; and
a processor operably connected to the transceiver, the processor configured to
determine REs for the DMRS of the PBCH and REs for the PBCH data included in the at least one symbol, wherein the REs for the DMRS of the PBCH and the REs for the PBCH data are interleaved frequency division multiplexed (IFDM),
detect a synchronization signal (SS) block hypothesis carried in the at least one DMRS sequence that is mapped into the REs for DMRS of PBCH, wherein the SS block hypothesis includes an SS/PBCH block index, and
decode a PBCH payload that is mapped into the REs for PBCH data.
2. The UE of claim 1 , wherein the transceiver is further configured to receive the at least one DMRS sequence on same antenna ports to be used for a secondary synchronization signal (SSS), using a same transmission scheme that is used for the SSS.
3. The UE of claim 1 , wherein at least one of the REs for DMRS of PBCH is present on every four subcarriers in the at least one symbol.
4. The UE of claim 1 , wherein the processor is further configured to determine SS blocks mapped into consecutive slots within a 20 millisecond periodicity of an SS burst set using a pre-defined mapping pattern based on the SS/PBCH block index.
5. The UE of claim 4 , wherein:
each of the consecutive slots includes a pair of SS blocks, and
a maximum number of SS blocks within one millisecond and a starting symbol of SS block within the pair of SS blocks included in a slot are determined by subcarrier spacing of the SS blocks.
6. The UE of claim 5 , wherein, when the subcarrier spacing of SS block is 15 kHz, maximum two SS blocks are mapped within one millisecond, the starting symbol of a first SS block within the pair of SS blocks included in a slot is symbol #2 in the slot and the starting symbol of a second SS block within the pair of SS blocks included in a slot is symbol #8 in the slot.
7. The UE of claim 5 , wherein, when the subcarrier spacing of SS block is 30 kHz, maximum four SS blocks are mapped within one millisecond, the starting symbol of a first SS block within the pair of SS blocks included in a slot is symbol #7 in the slot and the starting symbol of a second SS block within the pair of SS blocks included in a slot is symbol #11 in the slot.
8. A base station (BS) in a wireless communication system, the BS comprising:
a processor configured to:
determine resource elements (REs) for at least one demodulation reference signal (DMRS) sequence of a physical broadcasting channel (PBCH) and REs for PBCH data,
generate a synchronization signal (SS) block hypothesis carried in the at least one DMRS sequence that is mapped into the REs for the DMRS of the PBCH, wherein the first part of the SS block hypothesis includes an SS block index, and
encode a PBCH payload that is mapped into the REs for the PBCH data, and
generate the at least one symbol using the REs for the DMRS of the PBCH and the REs for the PBCH data, wherein the REs for the DMRS of the PBCH and the REs for the PBCH data are interleaved frequency division multiplexed (IFDM); and
a transceiver operably connected to the processor, the transceiver configured to transmit, to a user equipment (UE) over downlink channels, the at least one symbol containing the REs mapped for the at least one DMRS sequence and the REs mapped for the PBCH data.
9. The BS of claim 8 , wherein the transceiver is further configured to transmit the at least one DMRS sequence, on same antenna ports to be used for a secondary synchronization signal (SSS), using a same transmission scheme that is used for the SSS.
10. The BS of claim 8 , wherein at least one of the REs for the DMRS of the PBCH is present on every four subcarriers in the at least one symbol.
11. The BS of claim 8 , wherein the processor is further configured to generate SS blocks mapped into consecutive slots within a 20 millisecond periodicity of an SS burst set using a pre-defined mapping pattern based on the SS/PBCH block index.
12. The BS of claim 11 , wherein:
each of the consecutive slots includes a pair of SS blocks, and
a maximum number of SS blocks within one millisecond and a starting symbol of SS block within the pair of SS blocks included in a slot are determined by subcarrier spacing of the SS blocks.
13. The BS of claim 12 , wherein, when the subcarrier spacing of SS block is 15 kHz, maximum two SS blocks are mapped within one millisecond, the starting symbol of a first SS block within the pair of SS blocks included in a slot is symbol #2 in the slot and the starting symbol of a second SS block within the pair of SS blocks included in a slot is symbol #8 in the slot.
14. The BS of claim 13 , wherein, when the subcarrier spacing of SS block is 30 kHz, maximum four SS blocks are mapped within one millisecond, the starting symbol of a first SS block within the pair of SS blocks included in a slot is symbol #7 in the slot and the starting symbol of a second SS block within the pair of SS blocks included in a slot is symbol #11 in the slot.
15. A method of a user equipment (UE) in a wireless communication system, the method comprising:
receiving, from a base station (BS) over downlink channels, at least one symbol comprising resource elements (REs) mapped for at least one demodulation reference signal (DMRS) sequence of a physical broadcasting channel (PBCH) and REs mapped for PBCH data;
determining REs for the DMRS of the PBCH and REs for the PBCH data included in the at least one symbol, wherein the REs for the DMRS of the PBCH and the REs for the PBCH data are interleaved frequency division multiplexed (IFDM);
detecting a synchronization signal (SS) block hypothesis carried in the at least one DMRS sequence that is mapped into the REs for the DMRS of the PBCH, wherein the SS block hypothesis includes an SS/PBCH block index; and
decoding a PBCH payload that is mapped into the REs for the PBCH data.
16. The method of claim 15 , further comprising receiving the at least one DMRS sequence, on same antenna ports to be used for a secondary synchronization signal (SSS) using a same transmission scheme that is used for the SSS.
17. The method of claim 15 , wherein at least one of the REs for the DMRS of the PBCH is present on every four subcarriers in the at least one symbol.
18. The method of claim 15 , further comprising determining SS blocks mapped into consecutive slots within a 20 millisecond periodicity of an SS burst set using a pre-defined mapping pattern based on the SS/PBCH block index.
19. The method of claim 18 , wherein:
each of the consecutive slots includes a pair of SS blocks, and
a maximum number of SS blocks within one millisecond and a starting symbol of SS block within the pair of SS blocks included in a slot are determined by subcarrier spacing of the SS blocks.
20. The method of claim 19 , wherein:
when the subcarrier spacing of SS block is 15 kHz, maximum two SS blocks are mapped within one millisecond, the starting symbol of a first SS block within the pair of SS blocks included in a slot is symbol #2 in the slot and the starting symbol of a second SS block within the pair of SS blocks included in a slot is symbol #8 in the slot, and
when the subcarrier spacing of SS block is 30 kHz, maximum four SS blocks are mapped within one millisecond, the starting symbol of a first SS block within the pair of SS blocks included in a slot is symbol #7 in the slot and the starting symbol of a second SS block within the pair of SS blocks included in a slot is symbol #11 in the slot.