Method and system for continuous packet connectivity
A UE receives HSDPA traffic comprising legacy HSDPA traffic and HS-SCCH-less HSDPA traffic. The UE concurrently processes the received legacy HSDPA traffic and the received HS-SCCH-less HSDPA traffic. The received HSDPA traffic is concurrently buffered into a first storage and a second storage to support simultaneously receiving legacy HSDPA traffic and HS-SCCH-less HSDPA traffic. A HARQ process is performed on the buffered HSDPA traffic in the first storage or the second storage according to a corresponding HS-SCCH CRC test. The resulting HARQ processed HSDPA traffic is Turbo decoded. Turbo decoding on the previously HARQ processed HSDPA traffic is performed simultaneously with HARQ processing on the buffered HSDPA traffic in the first storage or the second storage. The buffered HS-SCCH-less HSDPA traffic is processed via HARQ processing and Turbo decoding for each of the four pre-determined transport formats.
1. A method for processing signals in a communication system, the method comprising:
performing, by one or more processors and circuits in a communication device, functions comprising:
receiving High Speed Downlink Packet Access (HSDPA) traffic comprising legacy HSDPA traffic and High-speed Shared Control Channel (HS-SCCH) less HSDPA traffic, wherein the HSDPA traffic includes an initial transmission, a first retransmission, and a second retransmission;
performing a first Cyclic Redundancy Check (CRC) test on a control channel associated with the received HSDPA traffic, wherein the first CRC test is performed on a first portion of the control channel associated with the initial transmission of the received HSDPA traffic;
if the first CRC test fails, blindly decoding the initial transmission; and
performing a second CRC test on the control channel, wherein the second CRC test is performed on a second portion of the control channel associated with the first retransmission and the second retransmission;
if the second CRC test passes,
retrieving control information from the control channel, the control information associated with the first retransmission or the second retransmission; and
decoding the second retransmission using the retrieved control information.
2. The method of claim 1 , further comprising:
concurrently buffering the received HSDPA traffic in a first storage and in a second storage.
3. The method according to claim 2 , further comprising hybrid automatic retransmission request (HARQ) processing buffered HSDPA traffic in the first storage or the buffered HSDPA traffic in the second storage according to a corresponding HS-SCCH CRC test.
4. The method according to claim 3 , further comprising storing an output of the HARQ processing from the first storage or the second storage.
5. The method according to claim 4 , further comprising Turbo decoding the stored output from the first storage or the second storage.
6. The method according to claim 4 , further comprising:
performing HARQ processing on the buffered HSDPA traffic in the first storage or the second storage; and
Turbo decoding a corresponding stored HARQ processed HSDPA traffic.
7. The method according to claim 6 , wherein the Turbo decoding further comprises Turbo decoding the HARQ processed HSDPA traffic for each transport format from a set of predetermined transport formats.
8. The method of claim 2 , further comprising:
processing the buffered HSDPA traffic of the first storage according to an HS-SCCH associated with the legacy HSDPA traffic to obtain the legacy HSDPA traffic.
9. The method of claim 1 , wherein blindly decoding the initial transmission is based on a set of pre-determined transport formats.
10. The method of claim 1 , wherein the initial transmission is the HS-SCCH less HSDPA traffic and the first retransmission is the legacy HSDPA traffic.
11. A system for signal processing, the system comprising:
one or more processors and/or circuits for use within a communication device configured to, wherein:
receive data packets from a base station;
receive High Speed Downlink Packet Access (HSDPA) traffic comprising legacy HSDPA traffic and High-speed Shared Control Channel (HS-SCCH) less HSDPA traffic, wherein the HSDPA traffic includes an initial transmission, a first retransmission, and a second retransmission; and
perform a first Cyclic Redundancy Check (CRC) test on a control channel associated with the received HSDPA traffic, wherein the first CRC test is performed on a first portion of the control channel associated with the initial transmission of the received HSDPA traffic,
if the first CRC test fails, blindly decode the initial transmission, and perform a second CRC test on the control channel, wherein the second CRC test is performed on a second portion of the control channel associated with the first retransmission and the second retransmission, if the second CRC test passes, retrieve control information from the control channel, the control information associated with the first retransmission or the second retransmission, and decode the second retransmission using the retrieved control information.
12. The system of claim 11 , wherein the one or more processors and/or circuits are further configured to concurrently buffer the received HSDPA traffic in a first storage and in a second storage.
13. The system according to claim 12 , wherein the one or more processors and/or circuits are further configured to hybrid automatic retransmission request (HARQ) process the buffered HSDPA traffic in the first storage or the buffered HSDPA traffic in the second storage according to the first CRC test.
14. The system according to claim 13 , wherein the one or more processors and/or circuits are further configured to store an output of the HARQ processing from the first storage or the second storage.
15. The system according to claim 14 , wherein the one or more processors and/or circuits are further configured to Turbo decode stored HARQ processed HSDPA traffic from an Incremental Redundancy (IR) memory or a Continuous Packet Connectivity (CPC) IR-memory.
16. The system according to claim 14 , wherein the one or more processors and/or circuits are further configured to perform HARQ processing on the buffered HSDPA traffic in the first storage or the second storage, and Turbo decoding a corresponding stored HARQ processed HSDPA traffic.
17. The system according to claim 16 , wherein the one or more processors and/or circuits are further configured to Turbo decode the HARQ processed HSDPA traffic for each transport format from a set of pre-determined transport formats.
18. The system of claim 12 , wherein the one or more processors and/or circuits are further configured to obtain the legacy HSDPA traffic by processing buffered HSDPA traffic of the first storage according to an HS-SCCH associated with the legacy HSDPA traffic.
19. The system of claim 11 , wherein the one or more processors and/or circuits are further configured to blindly decode the initial transmission based on a set of pre-determined transport formats.
20. The system of claim 11 , wherein the initial transmission is HS-SCCH less HSDPA traffic and the first retransmission is the legacy HSDPA traffic.