Network controlled throughput for enhanced uplink FACH
Systems and methods according to these exemplary embodiments provide for network control of interference associated with uplink transmissions by user equipments, UEs, operating in a random access state, e.g., the CELL_FACH state. A radio network controller, RNC, can determine, and then transmit, a limitation on uplink transmissions for such UEs, e.g., a maximum transport block size, TBS.
1. A method comprising:
determining, at a radio network controller (RNC) two maximum transport block size (TBS) values per NodeB, wherein said two maximum TBS values are associated with transmissions by user equipment on an enhanced dedicated channel (E-DCH) when said user equipment is operating in a CELL_FACH state, said two maximum TBS values including:
(a) a first maximum TBS value for users operating in said CELL_FACH state that are located at a cell edge; and
(b) a second maximum TBS value for users operating in said CELL_FACH state that are not located at said cell edge; the method further comprising:
transmitting, from said RNC, said two maximum TBS values toward each NodeB.
2. The method of claim 1 , wherein said step of determining further comprises:
using at least one of: Received Scheduled EDCH Power Share, RSEPS, measurements, Received Total Wideband Power, and Reference Received Total Wideband Power to determine said two maximum TBS values.
3. The method of claim 2 , further comprising:
receiving, at said NodeB, said two maximum TBS values; and
transmitting, by said NodeB, a scheduling grant toward at least some of said user equipment which are located at a cell edge and operating in said CELL_FACH state, which scheduling grant limits said user equipment to transmissions on said E-DCH having block sizes which are no greater than said first maximum TBS value.
4. The method of claim 2 , further comprising:
receiving, at said NodeB, said two maximum TBS values; and
transmitting, by said NodeB, a scheduling grant toward at least some of said user equipment which are located at a cell edge and operating in said CELL_FACH state, which scheduling grant does not limit said user equipment to transmissions on said E-DCH having block sizes which are no greater than said first maximum TBS value.
5. The method of claim 2 , further comprising:
updating said two maximum TBS values associated with transmissions by user equipment on said enhanced dedicated channel.
6. The method of claim 2 , wherein said two maximum TBS values are associated with a group of NodeBs and said step of transmitting further comprises:
transmitting, from said RNC, said two maximum TBS values toward said group of NodeBs.
7. The method of claim 1 , further comprising:
receiving, at said NodeB, said two maximum TBS values; and
transmitting, by said NodeB, a scheduling grant toward at least some of said user equipment which are located at a cell edge and operating in said CELL_FACH state, which scheduling grant limits said user equipment to transmissions on said E-DCH having block sizes which are no greater than said first maximum TBS value.
8. The method of claim 7 , further comprising:
updating said two maximum TBS values associated with transmissions by user equipment on said enhanced dedicated channel.
9. The method of claim 7 , wherein said two maximum TBS values are associated with a group of NodeBs and said step of transmitting further comprises:
transmitting, from said RNC, said two maximum TBS values toward said group of NodeBs.
10. The method of claim 1 , further comprising:
receiving, at said NodeB, said two maximum TBS values; and
transmitting, by said NodeB, a scheduling grant toward at least some of said user equipment which are located at a cell edge and operating in said CELL_FACH state, which scheduling grant does not limit said user equipment to transmissions on said E-DCH having block sizes which are no greater than said first maximum TBS value.
11. The method of claim 10 , further comprising:
updating said two maximum TBS values associated with transmissions by user equipment on said enhanced dedicated channel.
12. The method of claim 10 , wherein said two maximum TBS values are associated with a group of NodeBs and said step of transmitting further comprises:
transmitting, from said RNC, said two maximum TBS values toward said group of NodeBs.
13. The method of claim 1 , further comprising:
updating said two maximum TBS values associated with transmissions by user equipment on said enhanced dedicated channel.
14. The method of claim 13 , wherein said two maximum TBS values are associated with a group of NodeBs and said step of transmitting further comprises:
transmitting, from said RNC, said two maximum TBS values toward said group of NodeBs.
15. The method of claim 1 , wherein said two maximum TBS values are associated with a group of NodeBs and said step of transmitting further comprises:
transmitting, from said RNC, said two maximum TBS values toward said group of NodeBs.
16. A radio network controller (RNC), comprising:
a processor for controlling one or more NodeBs;
wherein said processor is adapted to determine two maximum (TBS) values per NodeB, wherein said two maximum TBS values are associated with transmissions by user equipment on an enhanced dedicated channel (E-DCH) when said user equipment is operating in a CELL_FACH state, said two maximum TBS values per NodeB including:
(a) a first maximum TBS value for users operating in said CELL_FACH state that are located at a cell edge; and
(b) a second maximum TBS value for users operating in said CELL_FACH state that are not located at said cell edge; and
said processor being further adapted to transmit said two maximum TBS values toward said one or more NodeBs.
17. The RNC of claim 16 , wherein said processor is further adapted to associate said two maximum TBS values with a group of NodeBs to transmit said two maximum TBS values toward said group of NodeBs.
18. A network node comprising:
an interface configured to send and receive signals;
a transceiver adapted to send and receive signals over an air interface toward and from a user equipment; and
a processor, connected to said transceiver;
wherein said interface is configured to receive a signal which indicates two maximum transport block size (TBS) values, said two maximum TBS values being associated with transmissions by user equipment on an enhanced dedicated channel (E-DCH) when said user equipment is operating in a CELL_FACH state, said two maximum TBS values including:
(a) a first maximum TBS value for users operating in said CELL_FACH state that are located at a cell edge; and
(b) a second maximum TBS value for users operating in said CELL_FACH state that are not located at said cell edge; and
wherein said processor is adapted to process said two maximum TBS values and to generate a serving grant signal based on said two maximum TBS values;
wherein said transceiver transmits said serving grant signal toward said user equipment.
19. The network node of claim 18 , wherein said processor is further adapted to generate said serving grant to limit said user equipment to transmissions on said enhanced dedicated channel (E-DCH) having block sizes which are no greater than said first maximum TBS value, said user equipment being located at a cell edge.
20. A method comprising:
receiving a signal which indicates two maximum transport block size (TBS) values, said two maximum TBS values being associated with transmissions by user equipment on an enhanced dedicated channel (E-DCH) when said user equipment is operating in a CELL_FACH state, said two maximum TBS values including:
(a) a first maximum TBS value for users operating in said CELL_FACH state that are located at a cell edge; and
(b) a second maximum TBS value for users operating in said CELL_FACH state that are not located at said cell edge; the method further comprising:
generating a serving grant signal based on said two maximum TBS values; and
transmitting said serving grant signal toward said user equipment.
21. The method of claim 20 , further comprising:
receiving said two maximum TBS values over an lub interface using at least one of Radio Network Subsystem Application Part, RNSAP, and Node B Application Part, NBAP, signaling.
22. The method of claim 21 , further comprising:
generating said serving grant to limit said user equipment to transmissions on said enhanced dedicated channel (E-DCH) having block sizes which are no greater than said first maximum TBS value, said user equipment being located at a cell edge.
23. The method of claim 21 , further comprising:
generating said serving grant which does not limit said user equipment to transmissions on said enhanced dedicated channel (E-DCH) having block sizes which are no greater than said first maximum TBS value, said user equipment being located at a cell edge.
24. The method of claim 21 , wherein said step of receiving further comprises:
receiving, as said signal which indicates said two maximum TBS values associated with transmissions by said user equipment on said uplink channel when said user equipment is operating in a CELL_FACH state, one of a cell setup message and a cell reconfiguration message.
25. The method of claim 20 , further comprising:
generating said serving grant to limit said user equipment to transmissions on said enhanced dedicated channel (E-DCH) having block sizes which are no greater than said first maximum TBS value, said user equipment being located at a cell edge.
26. The method of claim 25 , further comprising:
generating said serving grant which does not limit said user equipment to transmissions on said enhanced dedicated channel (E-DCH) having block sizes which are no greater than said first maximum TBS value, said user equipment being located at a cell edge.
27. The method of claim 25 , wherein said step of receiving further comprises:
receiving, as said signal which indicates said two maximum TBS values associated with transmissions by said user equipment on said uplink channel when said user equipment is operating in a CELL_FACH state, one of a cell setup message and a cell reconfiguration message.
28. The method of claim 20 , further comprising:
generating said serving grant which does not limit said user equipment to transmissions on said enhanced dedicated channel (E-DCH) having block sizes which are no greater than said first maximum TBS value, said user equipment being located at a cell edge.
29. The method of claim 28 , wherein said step of receiving further comprises:
receiving, as said signal which indicates said two maximum TBS values associated with transmissions by said user equipment on said uplink channel when said user equipment is operating in a CELL_FACH state, one of a cell setup message and a cell reconfiguration message.
30. The method of claim 20 , wherein said step of receiving further comprises:
receiving, as said signal which indicates said two maximum TBS values associated with transmissions by said user equipment on said uplink channel when said user equipment is operating in a CELL_FACH state, one of a cell setup message and a cell reconfiguration message.