Method of allocating uplink transmission channels in a communication system
A method of allocating channels in a user equipment is disclosed. In particular, a method of allocating a plurality of Dedicated Physical Channels (DPCHs) and Enhanced Dedicated Channels (E-DCHs) in a user equipment of a multicode transmission system. The method includes determining whether a High Speed Downlink Shared Channel (HS-DSCH) is configured for the user equipment (UE) and determining a number of codes used by the DPCH and the E-DCH. The method further includes allocating the DPCH and the E-DCH channels to an I branch or a Q branch based on the number of codes used by the DPCH and the E-DCH and the HS-DSCH configuration.
1. A method of allocating channelization code in a user equipment (UE) of a multicode transmission system, the method comprising:
configuring one or more enhanced dedicated physical data channels (E-DPDCHs) to permit data transmission; and
allocating, when a dedicated physical data channel (DPDCH) of the UE is configured, a separate channelization code for each of the one or more E-DPDCHs based on a number of DPDCHs that are allocated for the UE, wherein each of the separate channelization codes is denoted by Cch, SF, k, wherein SF is a spreading factor and k is a channelization code number, and wherein the k channelization code number, for each of the separate channelization codes, corresponds to SF/2 when one DPDCH is allocated for the UE.
2. The method of claim 1 , wherein each of the separate channelization codes is an orthogonal variable spreading factor (OVSF).
3. The method of claim 1 , wherein the code for the E-DPDCH is spread by a code C ch,SF,k where SF is a spreading factor and k=SF/2, if the DPDCH is configured.
4. The method of claim 1 , wherein the DPDCH is spread by a code C ch,SF,k where SF is a spreading factor of the DPDCH and k=SF/4.
5. The method of claim 1 , further comprising allocating a dedicated physical control channel (DPCCH) to C ch,256,0 in an orthogonal variable spreading factor tree.
6. The method of claim 1 , wherein the code for the one or more E-DPDCHs is spread by a code C ch,SF,k where SF=4 and k=2, if the DPDCH is configured.
7. The method of claim 1 , wherein if the DPDCH is configured, the DPDCH uses one or more of the channelization codes, and
wherein the channelization code for the one or more E-DPDCHs is different from the one or more of the channelization codes used by the DPDCH.
8. A method of allocating channelization code in a user equipment (UE) of a multicode transmission system, the method comprising:
configuring one or more enhanced dedicated physical data channels (E-DPDCHs) to permit data transmission; and
allocating, when a dedicated physical data channel (DPDCH) of the UE is configured, a separate channelization code for each of the one or more E-DPDCHs based on a number of DPDCHs that are allocated for the UE and in accordance to a following configuration,
DPDCH
E-DPDCH k
Code (C ch,SF,k )
1
E-DPDCH 1
C ch,SF,SF/2
E-DPDCH 2
C ch,4,2 if SF = 4
C ch,2,1 if SF = 2
wherein each of the separate channelization codes is denoted by Cch, SF, k, wherein SF is a spreading factor and k is a channelization code number, and wherein the k channelization code number, for each of the separate channelization codes, corresponds to SF/2 when one DPDCH is allocated for the UE, and
wherein the code is an orthogonal variable spreading factor (OVSF).
9. The method of claim 8 , wherein the DPDCH is spread by a code C ch,SF,k where SF is a spreading factor of the DPDCH and k=SF/4.
10. The method of claim 8 , further comprising allocating a dedicated physical control channel (DPCCH) to C ch,256,0 in an orthogonal variable spreading factor tree.
11. A user equipment (UE) for allocating channelization code for use in a multicode transmission system, the UE comprising:
a processor configured to:
configure one or more enhanced dedicated physical data channels (E-DPDCHs) to permit data transmission; and
allocate, when a dedicated physical data channel (DPDCH) of the UE is configured, a separate channelization code for each of the one or more E-DPDCHs based on a number of DPDCHs that are allocated for the UE, wherein each of the separate channelization codes is denoted by Cch, SF, k, wherein SF is a spreading factor and k is a channelization code number, and wherein the k channelization code number, for each of the separate channelization codes, corresponds to SF/2 when one DPDCH is allocated for the UE; and
a transmitter configured to transmit data on the configured one or more E-DPDCHs.
12. The UE of claim 11 , wherein the channelization code is an orthogonal variable spreading factor (OVSF).
13. The UE of claim 11 , wherein the DPDCH is spread by a code Cch,SF,k where SF is a spreading factor of the DPDCH and k=SF/4.
14. The UE of claim 11 , wherein the processor is further configured to allocate a dedicated physical control channel (DPCCH) to Cch,256,O in an orthogonal variable spreading factor tree.
15. The UE of claim 11 , wherein the channelization code for each of the one or more E-DPDCHs is determined by a following configuration,
DPDCH
E-DPDCH k
Code (C ch,SF,k )
1
E-DPDCH 1
C ch,SF,SF/2
E-DPDCH 2
C ch,4,2 if SF = 4
C ch,2,1 if SF = 2
wherein the column index of “DPDCH” indicates a number of the DPDCH configured for the UE, the column index of E-DPDCH k indicates a first E-DPDCH (E-DPDCH 1 ) and a second E-DPDCH (E-DPDCH 2 ) of the one or more E-DPDCHs.
16. The UE of claim 11 , wherein if the DPDCH is configured, the DPDCH uses one or more of the channelization codes, and
wherein the channelization code for the one or more E-DPDCHs is different from the one or more of the channelization codes used by the DPDCH.