Method and apparatus for collecting and providing diverse traffic information in cellular networks
A method of collecting and providing traffic statistics in a cellular network in accordance is proposed. A UE establishes an RRC connection with a base station. The UE starts to collect traffic statistics that comprises a CDF curve or a PDF diagram for packet inter-arrival time. The UE may receive a measurement configuration from the base station for the traffic statistics collection. The UE then reports a representation of the traffic statistics to the base station for RRC reconfiguration. The UE may also receive a reporting request from the base station that specifies a representation format. The representation format includes one or more probability values at corresponding inter-arrival time points, at least one slope of the CDF, one or more steep events in the CDF, or a PDF range.
1. A method, comprising:
establishing a radio resource control (RRC) connection by a user equipment (UE) with a base station in a mobile communication network;
collecting traffic statistics, wherein the traffic statistics comprises a cumulative distribution function (CDF) or a probability density function (PDF) of packet inter-arrival time, and wherein retransmitted packets are excluded from packet inter-arrival time statistics; and
reporting a representation of the traffic statistics to the base station.
2. The method of claim 1 , further comprising:
receiving a measurement configuration for packet inter-arrival time statistics or packet size statistics collection from the base station.
3. The method of claim 1 , wherein the traffic statistics comprises a first packet inter-arrival time of a plurality of packet intra-bursts and a second packet inter-arrival time of a plurality of packet inter-bursts.
4. The method of claim 3 , wherein an intra-burst is a plurality of packets having similar packet inter-arrival time that is smaller than a first predefine value, and wherein an inter-burst is a plurality of packet bursts having packet inter-arrival time that is larger than a second predefined value.
5. The method of claim 1 , wherein downlink packets and uplink packets are combined for the packet inter-arrival time statistics.
6. The method of claim 1 , wherein the UE suspends collecting the traffic statistics during handover and resumes collecting the traffic statistics after handover.
7. The method of claim 1 , wherein packets among all component carriers are combined under carrier aggregation for the packet inter-arrival time statistics.
8. The method of claim 1 , wherein the representation includes one or more probability values at corresponding inter-arrival time points, at least one slope of the CDF, one or more steep events in the CDF, or a PDF range.
9. A user equipment (UE), comprising:
a radio resource control (RRC) module that establishes an RRC connection with a base station in a mobile communication network;
a statistics collection module that collects traffic statistics upon detecting a triggering condition, wherein the traffic statistics comprises a cumulative distribution function (CDF) or a probability density function (PDF) of packet inter-arrival time, and wherein the traffic statistics comprises a first packet inter-arrival time of a plurality of packet intra-bursts and a second packet inter-arrival time of a plurality of packet inter-bursts; and
a statistics reporting module that reports a representation of the traffic statistics to the base station.
10. The UE of claim 9 , further comprising:
a receiver that receives a measurement configuration for packet inter-arrival time statistics or packet size statistics collection from the base station.
11. The UE of claim 9 , wherein downlink packets and uplink packets are combined for the packet inter-arrival time statistics.
12. The UE of claim 9 , wherein the UE suspends collecting the traffic statistics during handover and resumes collecting the traffic statistics after handover.
13. The UE of claim 9 , wherein packets among all component carriers are combined under carrier aggregation for the packet inter-arrival time statistics.
14. The UE of claim 9 , wherein the representation includes one or more probability values at corresponding inter-arrival time points, at least one slope of the CDF, one or more steep events in the CDF, or a PDF range.
15. A method, comprising:
establishing a radio resource control (RRC) connection by a base station with a user equipment (UE) in a mobile communication network; and
receiving a representation of traffic statistics from the UE, wherein the traffic statistics comprises a cumulative distribution function (CDF) or a probability density function (PDF) of packet inter-arrival time, and wherein the traffic statistics comprises a first packet inter-arrival time of a plurality of packet intra-bursts and a second packet inter-arrival time of a plurality of packet inter-bursts.
16. The method of claim 15 , further comprising:
transmitting a measurement configuration to the UE for packet inter-arrival time statistics or packet size statistics collection.
17. The method of claim 16 , wherein the measurement configuration specifies a collection period and a sliding size for the traffic statistics.
18. The method of claim 16 , wherein the measurement configuration specifies a traffic type to be collected for the traffic statistics.
19. The method of claim 15 , further comprising:
transmitting a reporting request to the UE for reporting the representation of the CDF or PDF of the packet inter-arrival time statistics.
20. The method of claim 19 , wherein the reporting request specifies a representation format, wherein the representation format includes one or more probability values at corresponding inter-arrival time points, at least one slope of the CDF, one or more steep events in the CDF, or a PDF range.
21. The method of claim 20 , wherein the steep events further comprise assigning at least one threshold to identify the steep events.