5.11 E-DCH Procedure

25.2243GPPPhysical layer procedures (TDD)TS

5.11.1 ACK/NACK detection

The physical layer in the UE shall detect ACK or NACK contained within the E-HICH. Which E-HICH is associated with the corresponding E-DCH transmission is defined in [8].

5.11.2 Serving and neighbour cell pathloss metric derivation

The UE shall be capable of measuring the P-CCPCH RSCP of the serving cell and of intra-frequency and inter-frequency neighbour cells in accordance with [11]. The P-CCPCH transmit power (P_ref) of the serving cell and of each neighbour cell (with a primary or a secondary frequency being the same as UE’s current working frequency) in the monitored neighbour cell list shall be signalled by higher layers to the UE in order that the UE may estimate the mean pathloss to the serving cell (L_serv) and to each of the N neighbour cells in the monitored neighbour cell list (L₁, L₂, … L_N). The pathloss used in the following formulas is a linear value, but not a logarithmic (dB) value.

Higher layers shall configure the UE to use SNPL reporting type 1 or SNPL reporting type 2. In accordance with the SNPL reporting type, the UE shall be capable of forming a metric corresponding to:

{for SNPL reporting type 1}

{for SNPL reporting type 2}

The metric  shall be converted into a logarithmic (dB) value Q and shall be mapped to a Serving and Neighbour Cell Pathloss (SNPL) index according to table 2b. The SNPL index is supplied to and used by higher layers (see [18]).

Table 2b: SNPL mapping

Q = 10*log10(f)	SNPL index
Q <-10	0
-10 ≤ Q < -8	1
-8≤ Q < -6	2
-6≤ Q < -5	3
-5≤ Q < -4	4
-4 ≤ Q < -3	5
-3 ≤ Q < -2	6
-2 ≤ Q < -1	7
-1 ≤ Q < 0	8
0 ≤ Q < 1	9
1 ≤ Q < 2	10
2 ≤ Q < 3	11
3 ≤ Q < 4	12
4 ≤ Q < 5	13
5 ≤ Q < 6	14
6 ≤ Q < 7	15
7 ≤ Q < 8	16
8 ≤ Q < 9	17
9 ≤ Q < 10	18
10 ≤ Q < 11	19
11 ≤ Q < 12	20
12 ≤ Q < 13	21
13 ≤ Q < 14	22
14 ≤ Q < 15	23
15 ≤ Q < 16	24
16 ≤ Q < 17	25
17 ≤ Q < 18	26
18 ≤ Q < 20	27
20 ≤ Q < 22	28
22 ≤ Q < 24	29
24 ≤ Q < 26	30
26 ≤ Q	31

If the higher layer signalling information regarding the required P-CCPCH reference power of all the neighbour cells or the serving cell is not available for the UEs staying in CELL_DCH state, e.g. when the serving cell changes or the working frequency changes within the serving cell, but the intra-frequency cell list and/or the inter-frequency cell list has not been updated, the UE shall return an SNPL index value of 9.

For the UEs staying in CELL_DCH state, if the intra-frequency cell list and/or the inter-frequency cell list have been updated, before the pathloss of all of the cells that SNPL calculation involves is derived, the UE shall return an SNPL index value of 9.

After receiving the related cell information, if neighbour cell indicated for SNPL reporting in the monitored neighbour cell list mentioned above is null, the UE shall return an SNPL index value of 9.

For the UE configured with multi-carrier E-DCH transmission, all the uplink E-DCH carriers of the UE can be divided into one or more carrier group(s). The neighbour cells which are used for SNPL calculation for each carrier in one carrier group are the same. For physical layer of UE, the carrier group information shall be indicated by higher layer to make it know that which uplink E-DCH carriers are in the same carrier group. For each carrier group, the SNPL is calculated in reference to one carrier of the carrier group and is shared by all the carriers which are in the same carrier group. Higher layers shall configure the UE to use SNPL reporting type 1 or SNPL reporting type 2 for all carrier groups. In accordance with the SNPL reporting type, the UE shall be capable of selecting the corresponding formula from the above two formulas to calculate the SNPL for one carrier group, where Lserv is the mean pathloss to the serving cell (Lserv) and L_n is the mean pathloss to the n-th cell of the N neighbour cells (with a primary or a secondary frequency being the same as one of the frequencies in the current carrier group) in the monitored neighbour cell list.

For multi-carrier E-DCH transmission, the UE shall return an SNPL index value of 9 for one carrier when the UE is under the same scenoarios as listed above for UE’s returning an SNPL index value of 9.

5.11.3 E-AGCH monitoring in CELL_DCH state

If E-AGCH DRX information is not configured by higher layers,

if the UE has semi-persistent E-PUCH resources, the UE shall keep monitoring a set of E-AGCHs continuously;

otherwise, when the latest scheduling information UE sent indicates the TEBS equals zero and the UE has received the corresponding ACK on E-HICH, after continuing monitoring E-AGCH for a period of time configured by higher layers, the UE may stop monitoring E-AGCH if the UE has no E-DCH data (including retransmission data) to transmit. When the TEBS becomes larger than zero, the UE shall start monitoring E-AGCH after sending scheduling information indicating that the TEBS is larger than zero.

If the E-AGCH DRX information is configured by higher layers, the UE shall monitor E-AGCHs according to rules defined in the subclause 5.13.

5.11.3A E-AGCH monitoring in CELL_FACH state

For the UE with a stored dedicated UE identity in CELL_FACH state, when the latest scheduling information UE sent indicates the TEBS equals zero and the UE has received the corresponding ACK on E-HICH, after continuing monitoring E-AGCH for a period of time (T321) configured by higher layers (as described in [15]), UE may stop monitoring E-AGCH if the UE has no E-DCH data (including retransmission data) to transmit. The TEBS is described in [18].

If the TEBS becomes larger than zero, UE shall start monitoring E-AGCH after sending scheduling information indicating that the TEBS is larger than zero.

For the UE without a dedicated UE identity in CELL_FACH state or in IDLE mode, UE shall stop monitoring E-AGCH outside the common E-RNTI Scheduling Window (as described in [18]).