====== Superposition coding in DL transmission ====== ===== For far user ===== Nothing ===== For near user ===== Need to add a field to announce that near user has been superposed Need to known which constellation and STBC is used by far user. As NU and FU share the same block, nothing is required but NE terminal will have to perform a sort to find FU Proposal * add redundant information about FU in NU description * imposed that FU description follow NU in DL map * * use pilot to separete SDMA user Pilots do not need to be superimposed ===== 8.4.5.3 DL-MAP IE format ===== ==== DIUC ==== DIUC used for the burst. ==== CID ==== The connection identifier that represents the assignment of the IE to a broadcast, multicast, or unicast address. ==== OFDMA Symbol offset ==== The offset of the OFDMA symbol in which the burst starts, measured in OFDMA symbols from the DL symbol in which the preamble is transmitted with the symbol immediately following the preamble being offset 1. The symbol offset shall follow the normal slot allocation within a zone so that the difference between OFDMA symbol offsets for all bursts within a zone is a multiple of the slot length in symbols. ==== Subchannel offset ==== The lowest index OFDMA subchannel used for carrying the burst, starting from subchannel 0. ==== Boosting ==== Power boost applied to the allocation’s data subcarriers. The field shall be zero in an AAS zone with AMC permutation or in a zone with AMC or PUSC-ASCA permutation using dedicated pilots. ==== No. OFDMA Symbols ==== The number of OFDMA symbols that are used (fully or partially) to carry the DL PHY burst. The value of the field shall be a multiple of the slot length in symbols. ==== No. of subchannels ==== The number of subchannels with subsequent indexes, used to carry the burst. ==== Repetition Coding Indication ==== Indicates the repetition code used inside the allocated burst. Repetition shall be used only for DIUC indicating QPSK modulation. Syntax Size(b) Notes ------------------------------------------------------------------------------------------------------------------------------------------------------------------- DL-MAP_IE() { -- -- DIUC 4 -- if (DIUC == 14) { -- -- Extended-2 DIUC dependent IE -- -- } Else if (DIUC == 15) { -- -- Extended DIUC dependent IE variable See 8.4.5.3.2 and 8.4.5.3.2.1 } else { -- -- if (INC_CID == 1) { -- The DL-MAP starts with INC_CID = 0. INC_CID is toggled between 0 and 1 by the CID-SWITCH_IE() (8.4.5.3.7) N_CID 8 Number of CIDs assigned for this IE for (n = 0; n < N_CID; n++) { -- -- If ( included in SUB-DL-UL-MAP) { -- -- RCID_IE() -- For SUB-DL-UL-MAP, reduced CID format is used } else { -- -- CID 16 -- } -- -- } -- -- } OFDMA Symbol offset 8 -- if (Permutation = 0b11 and -- -- (AMC type is 2x3 or 1x6)) { Subchannel offset 8 -- Boosting 3 000: Normal (not boosted); 001: +6dB; 010: ­6dB; 011: +9dB; 100: +3dB; 101: ­3dB; 110: ­9dB; 111: ­12dB; No. OFDMA triple symbol 5 Number of OFDMA symbols is given in multiples of 3 symbols No. Subchannels 6 -- } else { -- -- Subchannel offset 6 -- Boosting 3 000: Normal (not boosted); 001: +6dB; 010: ­6dB; 011: +9dB; 100: +3dB; 101: -3dB; 110: ­9dB; 111: ­12dB; No. OFDMA Symbols 7 -- No. Subchannels 6 -- } -- -- Repetition Coding Indication 2 0b00: No repetition coding 0b01: Repetition coding of 2 used 0b10: Repetition coding of 4 used 0b11: Repetition coding of 6 used } -- -- } -- -- ===== 8.4.5.4.10.4 Effective CINR feedback for fast-feedback channel ===== When the feedback type field in the CQICH_IE() is 0b01 or the effective CINR report is request by REP-REQ, the SS shall report the effective CINR, as defined in 6.3.18, according to Table 448. To avoid ambiguity, both the BS and the SS must know the FEC type assumed for this report. The FEC type assumed for the MCS column is the first FEC type in the table in 11.8.3.7.2 for which the SS and BS have successfully negotiated the capability exchange. If none of the FEC types in 11.8.3.7.2 have been successfully negotiated, then the mandatory FEC type shall be assumed. In the case of 6-bit CQI, Table 298b shall be applied to the 4 LSB bits and the two MSB bits shall be set to `00'. ==== Table 448 -- Effective CINR feedback encoding ==== ===== 8.4.5.3.6 Data Location In Another BS IE =====