Methods and apparatuses for synchronization signal transmission
Embodiments of the present disclosure relate to methods and an apparatuses for synchronization signal (SS) transmission. In example embodiments, a method implemented in a network device is provided. According to the method, information on a plurality of SS blocks to be transmitted by the network device is determined based on at least one of a frequency range and a value of subcarrier spacing. The information at least in part indicates timing for transmitting the plurality of SS blocks The plurality of SS blocks are transmitted to at least one terminal device based on the determined information.
1. A network device comprising a processor configured to:
generate DMRS (DeModulation Reference Signal) sequences for PBCH (Physical Broadcast CHannel); and
transmit, to a terminal, SS (Synchronization Signals) blocks in the frame, wherein
the PBCH is included in the SS blocks, wherein
one of the DMRS sequences in 1st-half of the frame is different from one of the DMRS sequences in 2nd-half of the frame,
the maximum number of the SS blocks within the 1st-half or the 2nd-half duration of the frame is 4,
the DMRS sequences is 8 DMRS sequences, wherein
4 DMRS sequences of the 8 DMRS sequences is in the 1st-half of the frame, and
the other 4 DMRS sequences of the 8 DMRS sequences is in the 2nd-half of the frame, and
the 4 DMRS sequences in the 1st-half of the frame is different from the other 4 DMRS sequences in the 2nd-half of the frame.
2. The network device according to claim 1 , wherein
an initial value for generating the one of the DMRS sequences in the 1st-half of the frame is different from an initial value for generating the one of the DMRS sequences in the 2nd-half of the frame.
3. The network device according to claim 1 , wherein
the SS blocks is included in one of the 1st-half of the frame or the 2nd-half of the frame.
4. The network device according to claim 1 , wherein
initial values for generating the 4 DMRS sequences in the 1st-half of the frame is different from initial values for generating the other 4 DMRS sequences in the 2st-half of the frame.
5. A terminal comprising a processor configured to:
receive, from a network device, SS (Synchronization Signals) blocks in a frame; and
detect DMRS (DeModulation Reference Signal) sequences for PBCH (Physical Broadcast CHannel), wherein
the PBCH is included in the SS blocks, wherein
one of the DMRS sequences in 1st-half of the frame is different from one of the DMRS sequences in 2nd-half of the frame,
the maximum number of the SS blocks within the 1st-half or the 2nd-half duration of the frame is 4,
the DMRS sequences is 8 DMRS sequences, wherein
4 DMRS sequences of the 8 DMRS sequences is in the 1st-half of the frame; and
the other 4 DMRS sequences of the 8 DMRS sequences is in the 2nd-half of the frame, and
the 4 DMRS sequences in the 1st-half of the frame is different from the other 4 DMRS sequences in the 2nd-half of the frame.
6. The terminal according to claim 5 , wherein
an initial value for generating the one of the DMRS sequences in the 1st-half of the frame is different from an initial value for generating the one of the DMRS sequences in the 2nd-half of the frame.
7. The terminal according to claim 5 , wherein
the SS blocks is included in one of the 1st-half of the frame or the 2nd-half of the frame.
8. The terminal according to claim 5 , wherein
initial values for generating the 4 DMRS sequences in the 1st-half of the frame is different from initial values for generating the other 4 DMRS sequences in the 2st-half of the frame.
9. A method comprising:
generating DMRS (DeModulation Reference Signal) sequences for PBCH (Physical Broadcast CHannel); and
transmitting SS (Synchronization Signals) blocks in the frame, wherein
the PBCH is included in the SS blocks, wherein
one of the DMRS sequences in 1st-half of the frame is different from one of the DMRS sequences in 2nd-half of the frame,
the maximum number of the SS blocks within the 1st-half or the 2nd-half duration of the frame is 4,
the DMRS sequences is 8 DMRS sequences, wherein
4 DMRS sequences of the 8 DMRS sequences is in the 1st-half of the frame; and
the other 4 DMRS sequences of the 8 DMRS sequences is in the 2nd-half of the frame, and
the 4 DMRS sequences in the 1st-half of the frame is different from the other 4 DMRS sequences in the 2nd-half of the frame.
10. The method according to claim 9 , wherein
an initial value for generating the one of the DMRS sequences in the 1st-half of the frame is different from an initial value for generating the one of the DMRS sequences in the 2nd-half of the frame.
11. The method according to claim 9 , wherein
the SS blocks is included in one of the 1st-half of the frame or the 2nd-half of the frame.
12. The method according to claim 9 , wherein
initial values for generating the 4 DMRS sequences in the 1st-half of the frame is different from initial values for generating the other 4 DMRS sequences in the 2st-half of the frame.
13. A method comprising:
receiving SS (Synchronization Signals) blocks in a frame; and
detecting DMRS (DeModulation Reference Signal) sequences for PBCH (Physical Broadcast CHannel), wherein
the PBCH is included in the SS blocks, wherein
one of the DMRS sequences in 1st-half of the frame is different from one of the DMRS sequences in 2nd-half of the frame,
the maximum number of the SS blocks within the 1st-half or the 2nd-half duration of the frame is 4,
the DMRS sequences is 8 DMRS sequences, wherein
4 DMRS sequences of the 8 DMRS sequences is in the 1st-half of the frame; and
the other 4 DMRS sequences of the 8 DMRS sequences is in the 2nd-half of the frame, and
the 4 DMRS sequences in the 1st-half of the frame is different from the other 4 DMRS sequences in the 2nd-half of the frame.
14. The method according to claim 13 , wherein
an initial value for generating the one of the DMRS sequences in the 1st-half of the frame is different from an initial value for generating the one of the DMRS sequences in the 2nd-half of the frame.
15. The method according to claim 13 , wherein the SS blocks is included in one of the 1st-half of the frame or the 2nd-half of the frame.
16. The method according to claim 13 , wherein
initial values for generating the 4 DMRS sequences in the 1st-half of the frame is different from initial values for generating the other 4 DMRS sequences in the 2st-half of the frame.