C.1 General
36.521-13GPPEvolved Universal Terrestrial Radio Access (E-UTRA)Part 1: Conformance testingRadio transmission and receptionRelease 17TSUser Equipment (UE) conformance specification
Table C.1-1 describes the mapping of downlink physical channels and signals to physical resources for E-UTRA FDD.
Table C.1-2 describes the mapping of downlink physical channels and signals to physical resources for E-UTRA TDD.
Table C.1-3 describes the mapping of downlink physical channels and signals to physical resources for NB-IoT.
Table C.1-1: Mapping of downlink physical channels and signals to physical resources for E-UTRA FDD
|
Physical channel |
Time Domain Location |
Frequency Domain Location |
Note |
|
RS |
Symbols 0, 4 of each subframe for antenna port 0 & 1 Symbol 1 of each subframe for antenna port 2 & 3 |
Downlink system bandwidth dependent |
Mapping rule is specified in TS 36.211 6.10.1.2 – CELL_ID = 0 |
|
PBCH |
Symbols 0 to 3 of slot 1 of subframe 0 of each radio frame |
Occupies 72 subcarriers centred on the DC subcarrier |
Mapping rule is specified in TS 36.211 Section 6.6.4 (Note 2) |
|
PSS |
Symbol 6 of slot 0 and 10 of each radio frame |
Occupies 62 subcarriers centred on the DC subcarrier. Additional 10 subcarriers (5 on each side) adjacent to the centred 62 subcarriers are reserved. |
Mapping rule is specified in TS 36.211 Section 6.11.1.2 |
|
SSS |
Symbol 5 of slots 0 and 10 of each radio frame |
Occupies 62 subcarriers centred on the DC subcarrier. Additional 10 subcarriers (5 on each side) adjacent to the centred 62 subcarriers are reserved. |
Mapping rule is specified in TS 36.211 Section 6.11.2.2 |
|
PCFICH |
Symbol 0 of each subframe |
Downlink system bandwidth dependent. Maps into 4 REGs uniformly spread in the frequency domain over the whole system bandwidth. |
Mapping rule is specified in TS 36.211 Section 6.7.4 (Note 1) – CELL_ID = 0 |
|
PHICH |
Symbol 0 of each subframe |
Downlink system bandwidth dependent. Each PHICH group maps into 3 REGs in the frequency domain on the REGs not assigned to PCFICH over the whole system bandwidth |
Mapping rule is specified in TS 36.211 Section 6.9.3 (Note 1) – CELL_ID = 0 – Ng = 1 – Normal PHICH duration -Number of PHICH groups = 1(BW=1.4MHz)/2(BW=3MHz)/ 4(BW=5MHz)/7(BW=10MHz)/ 10(BW=15MHz)/13(BW=20MHz) Not required for UE category M1 testing |
|
PDCCH |
Symbols 0, 1, 2, 3 of each subframe for 1.4 MHz Symbols 0, 1, 2, of each subframe for 3 and 5 MHz Symbols 0, 1 of each subframe for 10, 15 and 20 MHz |
The remaining REGs not allocated to both PCFICH and PHICH are used for PDCCH |
Mapping rule is specified in TS 36.211 Section 6.8.5 (Note 1) |
|
MPDCCH |
Same as PDSCH |
For Subframe 0, subcarriers corresponding to resource elements not allocated to RS, PSS, SSS and PBCH (core set and repetitions) and reserved for PBCH antenna ports 3 and 4 on the 72 central subcarriers. For Subframe 5, subcarriers corresponding to resource elements not allocated to RS, PSS and SSS. For Subframe 9, subcarriers corresponding to resource elements not allocated to RS, PSS, SSS and PBCH (repetitions). For other subframes, subcarriers corresponding to resource elements not allocated to RS. |
Mapping rule is specified in TS 36.211 Section 6.8B.5 (Note 1) Only required for UE category M1 testing |
|
PDSCH |
All remaining OFDM symbols of each subframe not allocated to PDCCH |
For Subframe 0, REs not allocated to RS, PSS, SSS and PBCH, is allocated to PDSCH For Subframe 5, REs not allocated to RS, PSS and SSS, is allocated to PDSCH For other subframes, REs not allocated to RS, is allocated to PDSCH |
Note that there are reserved REs that are not used for transmission of any physical channels (Note 3 ) & (Note 4) which need to be taken into account when allocating REs to PDSCH |
|
Note 1: In case a single cell-specific RS is configured, cell-specific RS shall be assume to be present on antenna ports 0 and 1 for the purpose of mapping a symbol-quadruplet to a REG (resource-element group). (See TS 36.211 Section 6.2.4). Note 2: PBCH is mapped into RE assuming RS from 4 antennas are used at the eNB transmitter, irrespective of the actual number of Tx antenna. Resource elements assumed to be reserved for RS but not used for transmission of RS shall not be used for transmission of any physical channel. (See TS 36.211 Section 6.6.4). Note 3: In slot 0 and slot 10 of each radio frame, there are reserved REs for PSS and SSS that are not used for transmission of any physical channels. (See TS 36.211 Section 6.11.1.2 & 6.11.2.2). Note 4: REs used for RS transmission on any of the antenna ports in a slot shall not be used for any transmission on any other antenna port in the same slot and set to zero. (See TS 36.211 Section 6.10.1.2). |
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Table C.1-2: Mapping of downlink physical channels and signals to physical resources for E-UTRA TDD
|
Physical channel |
Time Domain Location |
Frequency Domain Location |
Note |
|
|
RS |
Symbols 0, 4 of each subframe for antenna port 0 & 1 Symbol 1 of each subframe for antenna port 2 & 3 |
Downlink system bandwidth dependent. |
Mapping rule is specified in TS 36.211[8] 6.10.1.2 – CELL_ID = 0 |
|
|
PBCH |
Symbols 0 to 3 of slot 1 of subframe 0 of each radio frame |
Occupies 72 subcarriers centred on the DC subcarrier |
Mapping rule is specified in TS 36.211[8] Section 6.6.4 (Note 3) |
|
|
PSS |
Symbol 2 of slot 2 and 12 of each radio frame |
Occupies 62 subcarriers centred on the DC subcarrier. Additional 10 subcarriers (5 on each side) adjacent to the centred 62 subcarriers are reserved. |
Mapping rule is specified in TS 36.211[8] Section 6.11.1.2 |
|
|
SSS |
Symbol 6 of slots 1 and 11 of each radio frame |
Occupies 62 subcarriers centred on the DC subcarrier. Additional 10 subcarriers (5 on each side) adjacent to the centred 62 subcarriers are reserved. |
Mapping rule is specified in TS 36.211[8] Section 6.11.2.2 |
|
|
PCFICH |
Symbol 0 of each subframe and special subframe |
Downlink system bandwidth dependent. Maps into 4 REGs uniformly spread in the frequency domain over the whole system bandwidth |
Mapping rule is specified in TS 36.211[8] Section 6.7.4 (Note 2) – CELL_ID = 0 |
|
|
PHICH |
Symbol 0 of each subframe and special subframe |
Downlink system bandwidth dependent. Each PHICH group maps into 3 REGs in the frequency domain on the REGs not assigned to PCFICH over the whole system bandwidth |
Mapping rule is specified in TS 36.211[8] Section 6.9.3 (Note 2) – CELL_ID = 0 – Ng = 1 – Normal PHICH duration -Number of PHICH groups = 1(BW=1.4MHz)/2(BW=3MHz)/ 4(BW=5MHz)/7(BW=10MHz)/ 10(BW=15MHz)/13(BW=20MHz) Not required for UE category M1 testing |
|
|
PDCCH |
For normal subframes(0,4,5,9) Symbols 0, 1, 2, 3 of each subframe for 1.4 MHz Symbols 0, 1, 2, of each subframe for 3 and 5 MHz Symbols 0, 1 of each subframe for 10, 15 and 20 MHz For special subframe (1&6) Symbols 0, 1 of each subframe for all BWs |
The remaining REGs not allocated to both PCFICH and PHICH are used for PDCCH |
Mapping rule is specified in TS 36.211[8] Section 6.8.5 (Note 2) |
|
|
MPDCCH |
Same as PDSCH |
For Subframe 0, subcarriers corresponding to resource elements not allocated to RS, SSS and PBCH (core set and repetitions) and reserved for PBCH antenna ports 3 and 4 on the 72 central subcarriers. For Subframe 5, subcarriers corresponding to resource elements not allocated to RS, SSS and PBCH (repetitions). For Subframe 1 and 6, resource elements not allocated to RS, PSS, GP and UpPTS. For other subframes, subcarriers corresponding to resource elements not allocated to RS. |
Mapping rule is specified in TS 36.211[8] Section 6.8B.5 (Note 2) Only required for UE category M1 testing |
|
|
PDSCH |
,All remaining OFDM symbols of each subframe not allocated to PDCCH with the following exception: For 1.4MHz,no data shall be scheduled on special subframes (1&6) to avoid problems with insufficient PDCCH performance |
For Subframe 0, REs not allocated to RS, SSS and PBCH, is allocated to PDSCH For Subframe 5, REs not allocated to RS and SSS, is allocated to PDSCH For Subframe 1 and 6, REs not allocated to RS, PSS, GP and UpPTS is allocated to PDSCH For other downlink subframes, REs not allocated to RS is allocated to PDSCH |
Note that there are reserved REs that are not used for transmission of any physical channels (Note 4 ) & (Note 5) which need to be taken into account when allocating REs to PDSCH |
|
|
Note 1: The mapping is based on the default TDD configuration for subframe assignment and special subframe patterns (see 36.508 [7]subclause 4.6.3) Note 2: In case a single cell-specific RS is configured, cell-specific RS shall be assume to be present on antenna ports 0 and 1 for the purpose of mapping a symbol-quadruplet to a REG (resource-element group). (See TS 36.211[8] Section 6.2.4). Note 3: PBCH is mapped into RE assuming RS from 4 antennas are used at the eNB transmitter, irrespective of the actual number of Tx antenna. Resource elements assumed to be reserved for RS but not used for transmission of RS shall not be used for transmission of any physical channel. (See TS 36.211[8] Section 6.6.4). Note 4: In slot 1,2,11 and 12 of each radio frame, there are reserved REs for PSS and SSS that are not used for transmission of any physical channels. (See TS 36.211[8] Section 6.11.1.2 & 6.11.2.2). Note 5: REs used for RS transmission on any of the antenna ports in a slot shall not be used for any transmission on any other antenna port in the same slot and set to zero. (See TS 36.211[8] Section 6.10.1.2). |
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Table C.1-3: Mapping of downlink physical channels and signals to physical resources for NB-IoT
|
Physical channel |
Time Domain Location |
Frequency Domain Location |
Note |
|
NPBCH |
NPBCH is transmitted in subframe 0 in every radio frame. NPBCH consists of 8 independently decodable blocks of 80 ms duration. The time interval where MIB remains unchanged is 640 ms. NPBCH does not use the first 3 symbols in a subframe in in-band operation. For stand-alone and guard-band, the first 3 symbols (of the subframe transmitting NPBCH) contain no NPBCH. |
Occupies any of the 12 subcarriers not reserved for transmission of reference signals |
Mapping rule is specified in TS 36.211 [8] sub clause 10.2.4.4 |
|
NPSS |
NPSS is transmitted in subframe 5. NPSS uses the last 11 OFDM symbols of subframes in which NB-PSS occurs for normal CP. NB-IoT PSS/SSS do not use: – the LTE PDCCH control region – REs used by LTE CRS NSSS periodicity is 10ms. |
NPSS is mapped to sub-carriers #0-10 of the NB-IoT carrier |
Mapping rule is specified in TS 36.211 [8] sub clause 10.2.7.1.2 |
|
NSSS |
NSSS is transmitted in subframe 9. NSSS uses the last 11 OFDM symbols of subframes in which NB-SSS occurs for normal CP. NB-IoT PSS/SSS do not use: – the LTE PDCCH control region – REs used by LTE CRS NSSS periodicity is 20ms. |
The number of subcarriers for NSSS is 12 |
Mapping rule is specified in TS 36.211 [8] sub clause 10.2.7.2.2 |
|
NPDCCH |
NPDCCH on a given NB-IoT carrier are not mapped to the subframes containing NPSS/NSSS/PBCH on that carrier. NPDCCH are not be mapped onto resources elements used for NRS. NPDCCH are not overlapped with PBCH, PSS, SSS, or CRS. One or two NPDCCHs can be transmitted in a subframe. In in-band, first 3 OFDM symbols are not used for NPDCCH. In stand-alone and guard-band, all OFDM symbols are available for NPDCCH. NPDCCH and NPDSCH are multiplexed only based on TDM at subframe level: – It means that only cross subframe scheduling is supported – The start of an NPDCCH search space is >=4ms after the end of the last NPDCCH search space |
NPDCCH is transmitted on an aggregation of one or two consecutive narrowband control channel elements (NCCEs), where a narrowband control channel element corresponds to 6 consecutive subcarriers in a subframe where NCCE 0 occupies subcarriers 0 through 5 and NCCE 1 occupies subcarriers 6 through 11 |
Mapping rule is specified in TS36.211 [8] sub clause 10.2.5.5 |
|
NPDSCH |
The start of NB-PDSCH transmission is >=4ms later than the end of its associated DL assignment. NPDSCH on a given NB-IoT carrier are not mapped to the subframes containing NPSS/NSSS/PBCH on that carrier. NPDSCH resource elements should be different from the ones used for NRS. NPDSCH resource elements should be different from the ones used for CRS. |
Occupies any of the 12 subcarriers not reserved for transmission of reference signals |
Mapping rule is specified in TS 36.211 [8] sub clause 10.2.3.4 |
|
NRS |
Narrowband reference signals are transmitted in all NB-IoT downlink subframes in a cell supporting NPDSCH transmission. NRS is not transmitted in subframes that are not NB-IoT downlink subframes, except if these subframes contain NPBCH or NPDSCH carrying SystemInformationBlockType1-NB where NRS shall be transmitted Narrowband reference signals are transmitted in subframes #0 and #4 and in subframes #9 not containing NSSS [when no NB-IoT downlink subframes configuration has not been established]. The narrowband reference signals shall not be mapped to subframes containing NPSS or NSSS. NRS are transmitted on one or two antenna ports 0 to 1 (Figure 10.2.6.2-1 in TS 36.211 [8]). |
2 subcarriers per antenna port in any OFDM symbol where NRS is transmitted |