A.3 Association between Midambles and Channelisation Codes

25.2213GPPPhysical channels and mapping of transport channels onto physical channels (TDD)Release 17TS

The following mapping schemes apply for the association between midambles and channelisation codes if no midamble is allocated by higher layers. Secondary channelisation codes are marked with a *. These associations apply both for UL and DL.

A.3.1 Association for Burst Type 1/3 and K_Cell =16 Midambles

Figure A.1: Association of Midambles to Spreading Codes for Burst Type 1/3 and K_Cell =16

A.3.2 Association for Burst Type 1/3 and K_Cell =8 Midambles

Figure A.2: Association of Midambles to Spreading Codes for Burst Type 1/3 and K_Cell =8

A.3.3 Association for Burst Type 1/3 and K_Cell =4 Midambles

Figure A.3: Association of Midambles to Spreading Codes for Burst Type 1/3 and K_Cell =4

A.3.4 Association for Burst Type 2 and K_Cell =6 Midambles

Figure A.4: Association of Midambles to Spreading Codes for Burst Type 2 and K_Cell =6

A.3.5 Association for Burst Type 2 and K_Cell =3 Midambles

Figure A.5: Association of Midambles to Spreading Codes for Burst Type 2 and K_Cell =3

Note that the association for burst type 2 can be derived from the association for burst type 1 and 3, using the following table:

Burst Type 1/3	m(1)	m(2)	m(3)	m(4)	m(5)	m(6)	m(7)	m(8)
Burst Type 2	m(1)	m(5)	m(3)	m(6)	m(2)	m(4)	–	–

A.3.6 Association for Burst Type 4 and K_Cell =1 Midamble

For burst type 4 there is only a single midamble defined, thus all channelisation codes are associated with the same midamble.

Annex AA (normative):
Basic Midamble Codes for the 1.28 Mcps option