Extended dynamic resource allocation in packet data transfer
View Patent ↗A method for control of packet data transmissions in a TDMA wireless network to provide for additional choices in the allocation of communication channels. The fixed relationship in the timing of the downlink allocation signalling and subsequent uplink transmission is altered for certain classes of mobile station to avoid physical constraints. Examples of variations in USF signalling in GPRS are given.
1. A multiple access communication method in a mobile station, comprising the steps of:
monitoring a downlink slot to detect a USF (Uplink Status Flag); and
transmitting on a first uplink slot in a case where a USF corresponding to said first uplink slot is detected on a first downlink slot and in a case where the USF corresponding to said first uplink slot is detected on a second downlink slot.
2. The method according to claim 1 , wherein the transmitting is performed on said first uplink slot and all higher numbered uplink slots allocated for uplink transmission if the USF corresponding to said first uplink slot is detected.
3. The method according to claim 1 , wherein the second downlink slot is the next numbered downlink slot of the first downlink slot.
4. The method according to claim 1 , wherein if a USF corresponding to an nth (n being an integer) uplink slot is detected on an nth downlink slot then the transmitting is performed on the nth uplink slot.
5. The method according to claim 4 , wherein if the USF corresponding to the nth uplink slot is detected on the nth downlink slot then the transmitting is performed on the nth uplink slot and all higher numbered uplink slots allocated for uplink transmission.
6. The method according to claim 1 , wherein the transmitting is performed on the next transmission frame or consecutive group of transmission frames.
7. The method according to claim 1 , wherein eight consecutive slots form a TDMA frame.
8. The method according to claim 7 , wherein the start of a TDMA frame on the uplink is delayed by three slots or three slots minus a fraction of a slot from the start of a TDMA frame on the downlink.
9. The method according to claim 8 , further comprising the step of performing adjacent cell signal level measurement and preparation for reception prior to re-configuration from transmission to reception.
10. The method according to claim 9 , wherein the time needed for performing adjacent cell signal level measurement and preparation for reception is three slots.
11. The method according to claim 9 , wherein the time needed for performing adjacent cell signal level measurement and preparation for reception is one slot.
12. The method according to claim 9 , wherein the time needed for performing adjacent cell signal level measurement and preparation for reception is one slot and 31 symbol periods timing advance offset.
13. The method according to claim 8 , further comprising the step of performing adjacent cell signal level measurement and preparation for transmission prior to re-configuration from reception to transmission, wherein the time needed for performing adjacent cell signal level measurement and preparation for transmission is one slot.
14. The method according to claim 1 , wherein the number of multislot class of the mobile station is any one of the multislot classes 7, 34, 39 and 45.
15. The method according to claim 1 , wherein said first downlink slot and said second downlink slot are included in the same frame.
16. A multiple access communication method in a mobile station, comprising the steps of:
receiving an assignment of at least a first PDCH (Packet Data Channel) and a second PDCH;
monitoring a PDCH to detect a USF; and
transmitting on said first assigned PDCH in a case where a USF corresponding to said first assigned PDCH is detected on a first PDCH and in a case where the USF corresponding to said first assigned PDCH is detected on a second PDCH.
17. The method according to claim 16 , wherein the transmitting is performed on said first assigned PDCH and all higher numbered assigned PDCHs allocated for uplink transmission if the USF corresponding to said first assigned PDCH is detected.
18. The method according to claim 16 , wherein the second PDCH is the next numbered PDCH of the first PDCH.
19. The method according to claim 16 , wherein the number of multislot class of the mobile station is any one of the multislot classes 7, 34, 39 and 45.
20. A mobile station apparatus for multiple access communication, comprising:
a detection section that monitors a downlink slot to detect a USF; and
a transmission section that transmits on a first uplink slot in a case where a USF corresponding to said first uplink slot is detected on a first downlink slot and in a case where the USF corresponding to said first uplink slot is detected on a second downlink slot.
21. The apparatus according to claim 20 , wherein the transmission section transmits on said first uplink slot and all higher numbered uplink slots allocated for uplink transmission if the USF corresponding to said first uplink slot is detected.
22. The apparatus according to claim 20 , wherein the second downlink slot is the next numbered downlink slot of the first downlink slot.
23. The apparatus according to claim 20 , wherein if a USF corresponding to an nth (n being an integer) uplink slot is detected on an nth downlink slot then the transmission section transmits on the nth uplink slot.
24. The apparatus according to claim 23 , wherein if the USF corresponding to the nth uplink slot is detected on the nth downlink slot then the transmission section transmits on the nth uplink slot and all higher numbered uplink slots allocated for uplink transmission.
25. The apparatus according to claim 20 , wherein the transmission section transmits on the next transmission frame or consecutive group of transmission frames.
26. The apparatus according to claim 20 , wherein eight consecutive slots form a TDMA frame.
27. The apparatus according to claim 26 , wherein the start of a TDMA frame on the uplink is delayed by three slots or three slots minus a fraction of a slot from the start of a TDMA frame on the downlink.
28. The apparatus according to claim 27 , further comprising a measurement section that performs adjacent cell signal level measurement prior to re-configuration from transmission to reception or prior to re-configuration from reception to transmission.
29. The apparatus according to claim 28 , wherein the measurement section performs adjacent cell signal level measurement prior to re-configuration from transmission to reception and the time needed for performing adjacent cell signal level measurement and preparation for reception is three slots.
30. The apparatus according to claim 28 , wherein the measurement section performs adjacent cell signal level measurement prior to re-configuration from transmission to reception and the time needed for performing adjacent cell signal level measurement and preparation for reception is one slot.
31. The apparatus according to claim 28 , wherein the measurement section performs adjacent cell signal level measurement prior to re-configuration from transmission to reception and the time needed for performing adjacent cell signal level measurement and preparation for reception is one slot and 31 symbol periods timing advance offset.
32. The apparatus according to claim 28 , wherein the measurement section performs adjacent cell signal level measurement prior to re-configuration from reception to transmission and the time needed for performing adjacent cell signal level measurement and preparation for transmission is one slot.
33. The apparatus according to claim 20 , wherein the number of multislot class of the mobile station is any one of the multislot classes 7, 34, 39 and 45.
34. The apparatus according to claim 20 , wherein said first downlink slot and said second downlink slot are included in the same frame.
35. A mobile station apparatus for multiple access communication, comprising:
a reception section that receives an assignment of at least a first PDCH and a second PDCH;
a detection section that monitors a PDCH to detect a USF; and
a transmission section that transmits on said first assigned PDCH in a case where a USF corresponding to said first assigned PDCH is detected on a first PDCH and in a case where the USF corresponding to said first assigned PDCH is detected on a second PDCH.
36. The apparatus according to claim 35 , wherein the transmission section transmits on said first assigned PDCH and all higher numbered assigned PDCHs for uplink transmission if the USF corresponding to said first assigned PDCH is detected.
37. The apparatus according to claim 35 , wherein the second PDCH is the next numbered PDCH of the first PDCH.
38. The apparatus according to claim 35 , wherein the number of multislot class of the mobile station is any one of the multislot classes 7, 34, 39 and 45.
39. A multiple access communication system having a mobile station and a network,
wherein the network transmits a USF on a downlink slot to the mobile station,
the mobile station comprising:
a detection section that monitors the downlink slot to detect the USF; and
a transmission section that transmits on a first uplink slot in a case where a USF corresponding to said first uplink slot is detected on a first downlink slot and in a case where the USF corresponding to said first uplink slot is detected on a second downlink slot.
40. The system according to claim 39 , wherein said first downlink slot and said second downlink slot are included in the same frame.