Configuration of non-UE-specific search space for M-PDCCH
This disclosure relates to implementations to support non-UE-specific (i.e. common) and UE-specific search spaces (SS) for M-PDCCH. One implementation relates to a UE comprising RF circuitry to receive, from an eNB, configuration information of one or a plurality of common Search Spaces (CSSs) for M-PDCCH; and baseband circuitry to monitor the one or more configured CSS for M-PDCCH transmissions; wherein the RF circuitry and/or baseband circuitry is adapted to support a reduced bandwidth (BW). Another implementation relates to an eNB comprising RF circuitry to transmit configuration information of a plurality of CSSs for M-PDCCH to one or more UEs supporting a reduced BW, wherein the plurality of CSSs for M-PDCCH are differentiated by “based on functionality”-differentiation that includes the type of use case and/or an EC level of the UE.
1. A user equipment (UE) comprising:
Radio-frequency (RF) circuitry to receive, from an evolved Node-B (eNB), configuration information of one or a plurality of common Search Spaces (CSSs) for M-PDCCH (Physical Downlink Control CHannel for MTC), wherein at least one CSS of the one or the plurality of CSSs is common only to a subset of UEs but not all UEs in a cell associated with the eNB, and wherein the configuration information indicates the at least one CSS is configured based on functionality; and
baseband circuitry to monitor the one or more configured CSSs for M-PDCCH transmissions;
wherein the RF circuitry and/or baseband circuitry is adaptable to support a reduced bandwidth (BW).
2. The UE of claim 1 , wherein the baseband circuitry is not to monitor the one or more CSSs for M-PDCCH in every Downlink (DL) subframe.
3. The UE of claim 1 , wherein the one or more CSSs for M-PDCCH comprises a plurality of CSSs, wherein the plurality of CSSs of M-PDCCH are used by a plurality of UEs within a cell, and wherein a subset of the plurality of UEs within the cell are to monitor instances of the plurality of CSSs for M-PDCCH.
4. The UE of claim 3 , wherein the baseband circuitry is to monitor the monitored instances of the plurality of CSSs using based-on-functionality-differentiation that includes a type of use case and/or an enhanced coverage (EC) level of the UE.
5. The UE of claim 1 , wherein the baseband circuitry is to monitor different instances of the plurality of CSSs for M-PDCCH on different time or frequency resources.
6. The UE of claim 5 , wherein the baseband circuitry is to monitor the different instances of the plurality of CSSs on different subframes or radio frames in time and/or on different narrowbands (NBs) or the same NB.
7. The UE of claim 1 , wherein each instance of the plurality of CSS corresponds to a type of message being transmitted or scheduled thereon.
8. The UE of claim 1 , wherein the one or more CSSs include one or more of the following:
one or more CSSs for Random Access Response (RAR) message (CSS-RAR),
one or more CSSs for paging messages (CSS-Paging),
one or more CSSs for scheduling Message 4 (CSS-Message 4), or
one or more CSSs for transmitting other Layer 1 control information to UEs in RRC CONNECTED mode (CSS-ConnectedMisc).
9. The UE of claim 8 , the baseband circuitry is to monitor one instance of the one or more CSS-RARs for a RAR message (DCI-RAR) or scheduling information (DCI-SA-RAR) for a RAR message transmitted using PDSCH, and
wherein one or multiple instances of CSS-RARs are configured by the network at the system-level based on different EC levels of UEs.
10. The UE of claim 8 , wherein the RF circuitry is to receive configuration information of the one or more CSS-RARs and/or one or more CSS-Paging in a Machine-Type-Communication (MTC) System Information Block (SIB).
11. The UE of claim 10 , wherein the configuration information for a respective instance of the one or more CSS-RARs and/or one or more CSS-Paging includes one or more of the following:
starting subframe for M-PDCCH repetitions,
Repetition Level (RL) for M-PDCCH,
Aggregation Levels (ALs) used for M-PDCCH,
an narrowband (NB) index, or
Physical Resource Blocks (PRBs) within the NB that constitute the M-PDCCH-PRB set, wherein number of PRBs is one of {2, 4, 6}.
12. The UE of claim 10 , wherein baseband circuitry is to derive a starting subframe for M-PDCCH repetitions with respect to the starting subframe defining the Paging Occasions (PO) and the Repetition Level (RL) used for the M-PDCCH.
13. The UE of claim 10 , wherein an Aggregation Level (AL) used for M-PDCCH for paging is fixed to the maximum AL=24 and the M-PDCCH-PRB set for the one or more CSS-Paging fixed to 6 PRBs of a NB.
14. The UE of claim 8 , wherein plural instances of CSS-Paging are configured.
15. The UE of claim 14 , wherein different UEs monitor different physical resources for respective instances of the CSS-Paging, or different UEs monitor different NBs for M-PDCCH carrying scheduling assignment for paging message transmission.
16. The UE of claim 14 , wherein the baseband circuitry is to determine the respective one of the NBs to monitor for CSS-Paging according to a function of a UE Identifier (ID).
17. The UE of claim 14 , wherein the baseband circuitry is to determine the respective one of the NBs to monitor for CSS-Paging according to a function of the EC level of the UE.
18. The UE of claim 1 , wherein the RF circuitry is to receive a single CSS configuration information for monitoring by the UE, and the baseband circuitry is to monitor the CSS for different DCIs scrambling by different Radio Network Temporary Identifiers (RNTIs) at different time instances.
19. The UE of claim 18 , wherein the RF circuitry is to receive common configuration information of CSS for M-PDCCH implicitly indicating different sets of UEs to monitor different physical resources for monitoring of M-PDCCH transmissions in their respective CSS for M-PDCCH.
20. The UE of claim 18 , wherein the baseband circuitry is to determine the monitored NB depending on one or more of the following parameters:
a UE Identity (UE ID),
an EC level of the UE,
Physical Random Access Channel (PRACH) transmission parameters, or
PRACH transmission parameters resources.
21. The UE of one of claim 11 , wherein the configuration information for the one or more CSS is provided as a single configuration along with the indices of the NBs.
22. An evolved Node B (eNB) comprising:
radiofrequency (RF) circuitry to transmit configuration information of a plurality of common Search Spaces (CSSs) for M-PDCCH (Physical Downlink Control CHannel for MTC) to one or more User Equipments (UEs) supporting a reduced bandwidth (BW), wherein at least one CSS of the plurality of CSSs is common only to a subset of UEs but not all UEs in a cell associated with the eNB, and wherein the configuration information indicates the at least one CSS is configured based on functionality;
wherein the plurality of CSSs for M-PDCCH are differentiated by based-on-functionality-differentiation that includes a type of use case and/or an enhanced coverage (EC) level of the UEs.