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. One or more baseband processors associated with a user equipment (UE) with reduced bandwidth (BW) support at both Radio Frequency (RF) and baseband, the baseband processor configured to perform operations comprising:
decoding configuration information, received from a base station, of one or more Common Search Spaces (CSSs) for M-PDCCH (Physical Downlink Control CHannel for MTC), the configuration information specifying a physical resource block (PRB) set for MDPCCH and a starting subframe of the M-PDCCH, the starting subframe being a function of a system frame number (SFN) or a function of an extended SFN, wherein the PRB set specifies a number of PRB pairs in the PRB set, and wherein a type of a scrambling of the configuration information is based on a type of a CSS of the one or more CSSs of the configuration information;
wherein the one or more CSSs are differentiated based on one or more enhanced coverage (EC) levels that are available to the one or more baseband processors, each CSS of the one or more CSSs configured for paging to a particular EC level of the one or more EC levels, the CSS defining, for the particular EC level, for one or more repetition levels;
determining an EC level; and
based on the EC level, monitoring for M-PDCCH transmissions according to the CSS associated with the determined EC level.
2. The one or more baseband processors of claim 1 configured to not to monitor the one or more CSSs for M-PDCCH transmissions in every Downlink (DL) subframe.
3. The one or more baseband processors of claim 1 , wherein the one or more CSSs for M-PDCCH comprises a plurality of CSSs, wherein the plurality of CSSs for 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 one or more baseband processors of claim 1 , configured to decode data indicating that a multicast transmission starts or is scheduled using M-PDCCH at a Paging Occasion (PO) and or a Paging Frame (PF).
5. The one or more baseband processors of claim 1 , wherein the one or more CSSs for M-PDCCH comprises a plurality of CSSs, and wherein the one or more baseband processors are configured to monitor different instances of the plurality of CSSs for M-PDCCH on different time or frequency resources.
6. The one or more baseband processors of claim 5 , configured 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 one or more baseband processors of claim 1 , wherein the one or more CSSs for M-PDCCH comprises a plurality of CSSs, and wherein each instance of the plurality of CSS corresponds to a type of message being transmitted or scheduled thereon.
8. The one or more baseband processors 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 I control information to UEs in RRC CONNECTED mode (CSS-ConnectedMisc).
9. The one or more baseband processors of claim 8 , configured to monitor one instance of the one or more CSS-RARs for a RAR message (DCI)-RAR) (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 a base station at a system-level based on different enhanced coverage (EC) levels of UEs.
10. The one or more baseband processors of claim 8 , wherein RF circuitry associated with the one or more baseband processors is configured 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 one or more baseband processors 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 a M-PDCCH-PRB set, wherein number of PRBs is one of {2, 4, 6}.
12. The one or more baseband processors of claim 10 , wherein baseband circuitry is to derive a starting subframe for M-PDCCH repetitions with respect to the starting subframe defining Paging Occasions (PO) and Repetition Level (RL) used for the M-PDCCH.
13. The one or more baseband processors of claim 10 , wherein an Aggregation Level (AL) used for M-PDCCH for paging is fixed to the maximum AL=24 and a M-PDCCH-PRB set for the one or more CSS-Paging fixed to 6 PRBs of a NB.
14. The one or more baseband processors of claim 8 , wherein plural instances of CSS-Paging are configured.
15. The one or more baseband processors 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 one or more baseband processors of claim 15 , configured to determine the respective one of the NBs to monitor for CSS-Paging according to a function of a UE Identifier (ID).
17. The one or more baseband processors of claim 15 , configured to determine the respective one of the NBs to monitor for CSS-Paging according to a function of an enhanced coverage (EC) level of the UE associated with the one or more baseband processors.
18. The one or more baseband processors of claim 1 , wherein RF circuitry associated with the one or more baseband processors is configured to receive a single CSS configuration information for monitoring by the one or more baseband processors, and the the one or more baseband processors are configured to monitor the CSS for different DC is scrambling by different Radio Network Temporary Identifiers (RNTis) at different time instances.
19. The one or more baseband processors of claim 18 , wherein RF circuitry associated with the one or more baseband processors is configured 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. A base station comprising:
radiofrequency (RF) circuitry to transmit configuration information for configuring a plurality of common Search Spaces (CSSs) for a M-PDCCH (Physical Downlink Control CHannel for MTC) to one or more User Equipment (UEs), the configuration information being based on a type of one or more messages being scheduled or transmitted or being based on one or more functionality factors of the one or more messages being scheduled or transmitted, the configuration information specifying a starting subframe for a physical resource block (PRB) set of the M-PDCCH, the starting subframe being a function of a system frame number (SFN) or a function of an extended SFN, wherein the PRB set specifies a number of PRB pairs in the PRB set, and wherein a type of a scrambling of the configuration information is based on a type of a CSS of the one or more CSSs of the configuration information; and
a baseband processor configured to differentiate the plurality of CSSs for the M-PDCCH based on one or more enhanced coverage (EC) levels that are available for the UEs, wherein the baseband processor configures, based on the configuration information, a CSS of the plurality of CSSs for paging to a particular EC level of the one or more EC levels, the CSS of the plurality of CSSs defining, for the particular EC level, one or more repetition levels.