6 Physical layer procedures for the 7.68 Mcps option

25.2243GPPPhysical layer procedures (TDD)TS

6.1 Transmitter power control

The transmit power control procedure is identical to that of the 3.84Mcps TDD option [clause 4.2] with the exception that the tablulated e values of subclause 4.2.2.4.1 for uplink power control of E-PUCH are substituted with the following values of table 3.

Table 3: Tabulated e values for the 7.68Mcps option

SFE-PUCH

(dB)

1

15

2

12

4

9

8

6

16

3

32

0

6.2 Timing advance

UTRAN may adjust the UE transmission timing with timing advance. The initial value for timing advance (TAphys) will be determined in the UTRAN by measurement of the timing of the PRACH or E-RUCCH. The required timing advance will be represented as a 9 bit number (0-511) ‘UL Timing Advance’ TAul, being the multiplier of 4 chips which is nearest to the required timing advance (i.e. TAphys = TAul  4 chips).

When Timing Advance is used the UTRAN will continuously measure the timing of a transmission from the UE and send the necessary timing advance value. On receipt of this value the UE shall adjust the timing of its transmissions accordingly in steps of ±4chips. The transmission of TA values is done by means of higher layer messages. Upon receiving the TA command the UE shall adjust its transmission timing according to the timing advance command at the frame number specified by higher layer signaling. The UE is signaled the TA value in advance of the specified frame activation time to allow for local processing of the command and application of the TA adjustment on the specified frame. Node-B is also signaled the TA value and radio frame number that the TA adjustment is expected.to take place.

If TA is enabled by higher layers, after handover the UE shall transmit in the new cell with timing advance TA adjusted by the relative timing difference t between the new and the old cell:

TAnew = TAold + 2t.

6.3 Synchronisation procedures

The synchronisation procedures are identical to those of the 3.84Mcps TDD option [clause 4.4].

6.4 Discontinuous transmission (DTX) procedure

The discontinuous transmission procedure is identical to that of the 3.84Mcps TDD option [clause 4.5].

6.5 Downlink transmit diversity

Downlink transmit diversity for PDSCH, DPCH, P-CCPCH, S-CCPCH, PICH, MICH, HS-SCCH, HS-PDSCH, E-AGCH, E-HICH and SCH is optional in UTRAN. Its support is mandatory at the UE.

6.5.1 Transmit diversity for PDSCH, DPCH, HS-SCCH, HS-PDSCH and E-AGCH

Transmit diversity for PDSCH, DPCH, HS-SCCH, HS-PDSCH and E-AGCH is identical to the 3.84Mcps TDD option [clause 4.6.1].

6.5.2 Transmit diversity for SCH and S-CCPCH

Transmit diversity for SCH and S-CCPCH is identical to the 3.84Mcps TDD option [clause 4.6.2].

6.5.3 Transmit diversity for Beacon Channels

When beacon channels use burst type 4, SCTD shall not be applied.

When beacon channels use burst type 1, Space Code Transmit Diversity (SCTD) for beacon channels may be employed optionally in the UTRAN. The support is mandatory in the UE except for the case where the UE only supports burst type 4. The use of SCTD will be indicated by higher layers. If SCTD is active within a cell:

– SCTD shall be applied to any beacon channel, and

– the maximum number KCell of midambles for burst type 1 that are supported in this cell may be 8 or 16, see [8]. The case of KCell = 4 midambles is not allowed for this burst type.

6.5.3.1 SCTD transmission scheme

The open loop downlink transmit diversity scheme for beacon channels is shown in figure 12. Channel coding, rate matching, interleaving and bit-to-symbol mapping are performed as in the non-diversity mode. In Space Code Transmit Diversity mode the data sequence is spread with the channelisation codes and and scrambled with the cell specific scrambling code. The spread sequence on code is then transmitted on the diversity antenna. The power applied to each antenna shall be equal.

Figure 12: Block Diagram of the transmitter SCTD

6.6 Random access procedure

The physical random access procedure described below is invoked whenever a higher layer requests transmission of a message on the RACH. The physical random access procedure is controlled by primitives from RRC and MAC. Retransmission on the RACH in case of failed transmission (e.g. due to a collision) is controlled by higher layers. Thus, the backoff algorithm and associated handling of timers is not described here. The definition of the RACH in terms of PRACH Access Service Classes is broadcast on the BCH in each cell. Parameters for common physical channel uplink outer loop power control are also broadcast on the BCH in each cell. The UE needs to decode this information prior to transmission on the RACH.

6.6.1 Physical random access procedure

The physical random access procedure is identical to that of the 3.84Mcps TDD option [clause 4.7.1].

6.6A E-RUCCH transmission procedure

The E-RUCCH transmission procedure is identical to that of the 3.84Mcps TDD option [clause 4.7A]

6.7 DSCH procedure

Higher layer signalling is used to indicate to the UE the need for PDSCH detection.

6.8 Idle periods for IPDL location method

The IPDL procedure is identical to that of the 3.84Mcps TDD option [clause 4.10].

6.9 HS-DSCH procedure

6.9.1 Link adaptation procedure

For HS-DSCH, the modulation scheme and effective code rate shall be selected by higher layers located within the NodeB. This shall be achieved by appropriate selection of an HS-DSCH transport block size, modulation format and resources by higher layers. Selection of these parameters may be based on CQI reports from the UE.

The overall HS-DSCH link adaptation procedure consists of two parts:

Node B procedure:

1) The NodeB shall transmit HS-SCCH carrying a UE identity identifying the UE for which HS-DSCH TTI allocation has been given. In the case of HS-DSCH transmissions in consecutive TTIs to the same UE, the same HS-SCCH shall be used for associated signalling.

2) The NodeB transmits HS-DSCH to the UE using the resources indicated in the HS-SCCH.

3) Upon receiving the HS-SICH from the respective UE, the status report (ACK/NACK and CQI) shall be passed to higher layers.

UE procedure:

1) When indicated by higher layers, the UE shall start monitoring all HS-SCCHs that are in its HS-SCCH set as signalled to it by higher layers. The information carried on the HS-SCCH is described in [8].

2) In the case that a HS-SCCH is identified to be correct by its CRC, the UE shall read the HS-PDSCHs indicated by the HS-SCCH. In the case that a HS-SCCH is identified to be incorrect, the UE shall discard the data on the HS-SCCH and return to monitoring.

3) After reading the HS-PDSCHs, the UE shall generate an ACK/NACK message and transmit this to the NodeB in the associated HS-SICH, along with the most recently derived CQI.

The mapping of HS-PDSCH channelisation code set and timeslot information carried by the HS-SCCH for a given HS-DSCH TTI is described in [9].

For a given allocation of HS-PDSCH resources to a UE for a specific HS-DSCH TTI, the following shall apply:

– If timeslot information on HS-SCCH indicates two or more timeslots, none of these timeslots shall comprise a beacon channel.

– If timeslot information on HS-SCCH indicates a single timeslot and this timeslot comprises a beacon channel then:

– The Node-B shall not indicate SF=1 for any HS-PDSCH resource.

– The set of HS-PDSCH resources allocated by the Node-B to a UE shall exclusively comprise either beacon function or non-beacon function physical channels. The Node B shall therefore not allocate both beacon function and non-beacon function physical channels within the beacon timeslot to the UE. If the HS-DSCH for a specific HS-DSCH TTI is mapped to the beacon channel, this shall be signalled using kstart = 1 and kstop = 1. For a definition of the first and last allocated channelisation code indices kstart and kstop on HS-SCCH refer to [9].

– When SCTD antenna diversity is applied to the beacon channel, then the presence of channelisation code within the channelisation code set information on HS-SCCH shall implicitly indicate the presence of channelisation code .

6.9.2 HS-DSCH channel quality indication procedure

The HS-DSCH channel quality indication procedure is identical to that of the 3.84Mcps TDD option [clause 4.11.2].

6.10 Macro-diversity procedure

The macrodiversity procedure is identical to that of the 3.84Mcps TDD option [clause 4.12].

6.11 E-DCH related procedures

6.11.1 ACK/NACK detection

The procedure for detection of ACK/NACK is identical to that of the 3.84Mcps option [subclause 4.13.1]

6.11.2 Serving and neighbour cell pathloss metric derivation

The procedure for serving and neighbour cell metric derivation is identical to that of the 3.84Mcps option [subclause 4.13.2]

6.11.3 Channelisation code hopping procedure for E-PUCH

For the 7.68Mcps option, the procedure for channelisation code hopping on E-PUCH is identical to that of the 3.84Mcps option [subclause 4.13.3] with two exceptions:

i) the code hopping index parameter is calculated as:

ii) the code hopping index parameter sequences of table 1c are substituted for the values of table 4 below.

Table 4: Hopping index parameter sequences for the 7.68Mcps options

Hop index hi

CRRI

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

SF32

1

31

1

17

9

25

5

21

13

29

3

19

11

27

7

23

15

31

2

18

10

26

6

22

14

30

4

20

12

28

8

24

16

32

2

32

2

18

10

26

6

22

14

30

4

20

12

28

8

24

16

32

1

17

9

25

5

21

13

29

3

19

11

27

7

23

15

31

3

33

3

19

11

27

7

23

15

31

1

17

9

25

5

21

13

29

4

20

12

28

8

24

16

32

2

18

10

26

6

22

14

30

4

34

4

20

12

28

8

24

16

32

2

18

10

26

6

22

14

30

3

19

11

27

7

23

15

31

1

17

9

25

5

21

13

29

5

35

5

21

13

29

1

17

9

25

7

23

15

31

3

19

11

27

6

22

14

30

2

18

10

26

8

24

16

32

4

20

12

28

6

36

6

22

14

30

2

18

10

26

8

24

16

32

4

20

12

28

5

21

13

29

1

17

9

25

7

23

15

31

3

19

11

27

7

37

7

23

15

31

3

19

11

27

5

21

13

29

1

17

9

25

8

24

16

32

4

20

12

28

6

22

14

30

2

18

10

26

8

38

8

24

16

32

4

20

12

28

6

22

14

30

2

18

10

26

7

23

15

31

3

19

11

27

5

21

13

29

1

17

9

25

9

39

9

25

1

17

13

29

5

21

11

27

3

19

15

31

7

23

10

26

2

18

14

30

6

22

12

28

4

20

16

32

8

24

10

40

10

26

2

18

14

30

6

22

12

28

4

20

16

32

8

24

9

25

1

17

13

29

5

21

11

27

3

19

15

31

7

23

11

41

11

27

3

19

15

31

7

23

9

25

1

17

13

29

5

21

12

28

4

20

16

32

8

24

10

26

2

18

14

30

6

22

12

42

12

28

4

20

16

32

8

24

10

26

2

18

14

30

6

22

11

27

3

19

15

31

7

23

9

25

1

17

13

29

5

21

13

43

13

29

5

21

9

25

1

17

15

31

7

23

11

27

3

19

14

30

6

22

10

26

2

18

16

32

8

24

12

28

4

20

14

44

14

30

6

22

10

26

2

18

16

32

8

24

12

28

4

20

13

29

5

21

9

25

1

17

15

31

7

23

11

27

3

19

15

45

15

31

7

23

11

27

3

19

13

29

5

21

9

25

1

17

16

32

8

24

12

28

4

20

14

30

6

22

10

26

2

18

16

46

16

32

8

24

12

28

4

20

14

30

6

22

10

26

2

18

15

31

7

23

11

27

3

19

13

29

5

21

9

25

1

17

17

47

17

1

25

9

21

5

29

13

19

3

27

11

23

7

31

15

18

2

26

10

22

6

30

14

20

4

28

12

24

8

32

16

18

48

18

2

26

10

22

6

30

14

20

4

28

12

24

8

32

16

17

1

25

9

21

5

29

13

19

3

27

11

23

7

31

15

19

49

19

3

27

11

23

7

31

15

17

1

25

9

21

5

29

13

20

4

28

12

24

8

32

16

18

2

26

10

22

6

30

14

20

50

20

4

28

12

24

8

32

16

18

2

26

10

22

6

30

14

19

3

27

11

23

7

31

15

17

1

25

9

21

5

29

13

21

51

21

5

29

13

17

1

25

9

23

7

31

15

19

3

27

11

22

6

30

14

18

2

26

10

24

8

32

16

20

4

28

12

22

52

22

6

30

14

18

2

26

10

24

8

32

16

20

4

28

12

21

5

29

13

17

1

25

9

23

7

31

15

19

3

27

11

23

53

23

7

31

15

19

3

27

11

21

5

29

13

17

1

25

9

24

8

32

16

20

4

28

12

22

6

30

14

18

2

26

10

24

54

24

8

32

16

20

4

28

12

22

6

30

14

18

2

26

10

23

7

31

15

19

3

27

11

21

5

29

13

17

1

25

9

25

55

25

9

17

1

29

13

21

5

27

11

19

3

31

15

23

7

26

10

18

2

30

14

22

6

28

12

20

4

32

16

24

8

26

56

26

10

18

2

30

14

22

6

28

12

20

4

32

16

24

8

25

9

17

1

29

13

21

5

27

11

19

3

31

15

23

7

27

57

27

11

19

3

31

15

23

7

25

9

17

1

29

13

21

5

28

12

20

4

32

16

24

8

26

10

18

2

30

14

22

6

28

58

28

12

20

4

32

16

24

8

26

10

18

2

30

14

22

6

27

11

19

3

31

15

23

7

25

9

17

1

29

13

21

5

29

59

29

13

21

5

25

9

17

1

31

15

23

7

27

11

19

3

30

14

22

6

26

10

18

2

32

16

24

8

28

12

20

4

30

60

30

14

22

6

26

10

18

2

32

16

24

8

28

12

20

4

29

13

21

5

25

9

17

1

31

15

23

7

27

11

19

3

31

61

31

15

23

7

27

11

19

3

29

13

21

5

25

9

17

1

32

16

24

8

28

12

20

4

30

14

22

6

26

10

18

2

32

62

32

16

24

8

28

12

20

4

30

14

22

6

26

10

18

2

31

15

23

7

27

11

19

3

29

13

21

5

25

9

17

1

SF16

1

15

1

9

5

13

3

11

7

15

2

10

6

14

4

12

8

16

1

9

5

13

3

11

7

15

2

10

6

14

4

12

8

16

2

16

2

10

6

14

4

12

8

16

1

9

5

13

3

11

7

15

2

10

6

14

4

12

8

16

1

9

5

13

3

11

7

15

3

17

3

11

7

15

1

9

5

13

4

12

8

16

2

10

6

14

3

11

7

15

1

9

5

13

4

12

8

16

2

10

6

14

4

18

4

12

8

16

2

10

6

14

3

11

7

15

1

9

5

13

4

12

8

16

2

10

6

14

3

11

7

15

1

9

5

13

5

19

5

13

1

9

7

15

3

11

6

14

2

10

8

16

4

12

5

13

1

9

7

15

3

11

6

14

2

10

8

16

4

12

6

20

6

14

2

10

8

16

4

12

5

13

1

9

7

15

3

11

6

14

2

10

8

16

4

12

5

13

1

9

7

15

3

11

7

21

7

15

3

11

5

13

1

9

8

16

4

12

6

14

2

10

7

15

3

11

5

13

1

9

8

16

4

12

6

14

2

10

8

22

8

16

4

12

6

14

2

10

7

15

3

11

5

13

1

9

8

16

4

12

6

14

2

10

7

15

3

11

5

13

1

9

9

23

9

1

13

5

11

3

15

7

10

2

14

6

12

4

16

8

9

1

13

5

11

3

15

7

10

2

14

6

12

4

16

8

10

24

10

2

14

6

12

4

16

8

9

1

13

5

11

3

15

7

10

2

14

6

12

4

16

8

9

1

13

5

11

3

15

7

11

25

11

3

15

7

9

1

13

5

12

4

16

8

10

2

14

6

11

3

15

7

9

1

13

5

12

4

16

8

10

2

14

6

12

26

12

4

16

8

10

2

14

6

11

3

15

7

9

1

13

5

12

4

16

8

10

2

14

6

11

3

15

7

9

1

13

5

13

27

13

5

9

1

15

7

11

3

14

6

10

2

16

8

12

4

13

5

9

1

15

7

11

3

14

6

10

2

16

8

12

4

14

28

14

6

10

2

16

8

12

4

13

5

9

1

15

7

11

3

14

6

10

2

16

8

12

4

13

5

9

1

15

7

11

3

15

29

15

7

11

3

13

5

9

1

16

8

12

4

14

6

10

2

15

7

11

3

13

5

9

1

16

8

12

4

14

6

10

2

16

30

16

8

12

4

14

6

10

2

15

7

11

3

13

5

9

1

16

8

12

4

14

6

10

2

15

7

11

3

13

5

9

1

SF8

1

7

1

5

3

7

2

6

4

8

1

5

3

7

2

6

4

8

1

5

3

7

2

6

4

8

1

5

3

7

2

6

4

8

2

8

2

6

4

8

1

5

3

7

2

6

4

8

1

5

3

7

2

6

4

8

1

5

3

7

2

6

4

8

1

5

3

7

3

9

3

7

1

5

4

8

2

6

3

7

1

5

4

8

2

6

3

7

1

5

4

8

2

6

3

7

1

5

4

8

2

6

4

10

4

8

2

6

3

7

1

5

4

8

2

6

3

7

1

5

4

8

2

6

3

7

1

5

4

8

2

6

3

7

1

5

5

11

5

1

7

3

6

2

8

4

5

1

7

3

6

2

8

4

5

1

7

3

6

2

8

4

5

1

7

3

6

2

8

4

6

12

6

2

8

4

5

1

7

3

6

2

8

4

5

1

7

3

6

2

8

4

5

1

7

3

6

2

8

4

5

1

7

3

7

13

7

3

5

1

8

4

6

2

7

3

5

1

8

4

6

2

7

3

5

1

8

4

6

2

7

3

5

1

8

4

6

2

8

14

8

4

6

2

7

3

5

1

8

4

6

2

7

3

5

1

8

4

6

2

7

3

5

1

8

4

6

2

7

3

5

1

SF4

1

3

1

3

2

4

1

3

2

4

1

3

2

4

1

3

2

4

1

3

2

4

1

3

2

4

1

3

2

4

1

3

2

4

2

4

2

4

1

3

2

4

1

3

2

4

1

3

2

4

1

3

2

4

1

3

2

4

1

3

2

4

1

3

2

4

1

3

3

5

3

1

4

2

3

1

4

2

3

1

4

2

3

1

4

2

3

1

4

2

3

1

4

2

3

1

4

2

3

1

4

2

4

6

4

2

3

1

4

2

3

1

4

2

3

1

4

2

3

1

4

2

3

1

4

2

3

1

4

2

3

1

4

2

3

1

SF2

1

1

1

2

1

2

1

2

1

2

1

2

1

2

1

2

1

2

1

2

1

2

1

2

1

2

1

2

1

2

1

2

1

2

2

2

2

1

2

1

2

1

2

1

2

1

2

1

2

1

2

1

2

1

2

1

2

1

2

1

2

1

2

1

2

1

2

1

SF1

1

0

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

Annex A (informative):
Power Control