Discovery signal block mapping
Systems, methods, apparatuses, and computer program products for signal block mapping are provided. One method includes configuring, by a network node (e.g., base station or eNB), a group of discovery signaling blocks. The method may then include mapping the discovery signaling blocks of the group onto a subframe structure, including the group information into each of the discovery signaling blocks, and transmitting the discovery signaling blocks in the subframe structure.
1. A method comprising:
configuring, by a network node, a group of discovery signaling blocks, wherein a discovery signaling block comprises at least a synchronization signal and a physical broadcast channel;
mapping the discovery signaling blocks of the group onto a subframe structure;
including group information into each of the discovery signaling blocks; and
transmitting the discovery signaling blocks in the subframe structure.
2. The method according to claim 1 , wherein the including further comprises including also mapping information which indicates where a discovery signaling block is located in the subframe structure.
3. The method according to claim 1 , wherein the group information comprises information on how many discovery signaling blocks are in the group.
4. The method according to claim 1 , wherein the group comprises one or multiple discovery signaling blocks.
5. The method according to claim 1 , wherein one discovery signaling block comprises transmission of a plurality of signals from one or multiple radio frequency beams, and the one or multiple radio frequency beams used for the transmission of the signals in a given discovery signaling block are the same.
6. The method according to claim 1 , wherein the mapping is based on at least one of a size of the group or a subframe structure type configured in a cell.
7. The method according to claim 1 , wherein discovery signaling blocks of the group are located consecutively in time or in a clustered manner in time.
8. The method according to claim 1 , wherein each of the discovery signaling blocks is self-detectable or self-decodable.
9. The method according to claim 1 , wherein an opportunity for radio frequency beam switching is provided between each discovery signaling block within a group.
10. The method according to claim 1 , wherein discovery signaling blocks belonging to a same group are allocated according to predetermined rules onto one or more consecutive subframes.
11. The method according to claim 10 , wherein the discovery signaling blocks are not allocated upon downlink and/or uplink control channel symbols if a number of subframes upon which blocks are mapped in a consecutive manner is below a given value.
12. The method according to claim 1 , wherein the mapping of the discovery signaling blocks in a subframe starts from the end of data symbols, when a size of the group is greater than one.
13. The method according to claim 1 , wherein the discovery signaling blocks are mapped in a subframe on at least one of a downlink control symbol or downlink data symbol when a size of the group is one.
14. The method according to claim 1 , wherein at least one radio frequency beam is transmitting block and at least one other radio frequency beam is transmitting data symbols simultaneously.
15. The method according to claim 1 , wherein radio resources for discovery signal blocks and data symbols are separated in frequency domain.
16. An apparatus, comprising:
at least one processor; and
at least one memory comprising computer program code,
the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus at least to
configure a group of discovery signaling blocks, wherein a discovery signaling block comprises at least a synchronization signal and a physical broadcast channel;
map the discovery signaling blocks of the group onto a subframe structure;
include group information into each of the discovery signaling blocks; and
transmit the discovery signaling blocks in the subframe structure.
17. A method, comprising:
detecting, by a user equipment, one or more discovery signaling blocks, wherein a discovery signaling block comprises at least a synchronization signal and a physical broadcast channel;
determining a beam configuration applied for the detected one or more discovery signaling blocks;
determining a group structure of the detected one or more discovery signaling blocks;
determining a mapping of the detected one or more discovery signaling blocks on one or more subframes;
determining a structure of the one or more subframes based on the determined group structure and determined mapping; and
performing initial access to a cell based on the determining steps.