Content for TS 29.274 Word version: 17.3.0
12 GTP-C load & overload control mechanism
12.1 General
12.2 Load control solution
12.3 Overload control solution
12 GTP-C load & overload control mechanism |R12|
12.1 General
12.1.1 GTP-C overload problem
12.1.2 Scenarios leading to overload Word‑p. 355
12.1.3 Load & overload control concepts
12.2 Load control solution Word‑p. 356
12.2.1 Principles of load control
12.2.2 Applicability to 3GPP and non-3GPP access based interfaces Word‑p. 357
12.2.3 Node level load control
12.2.4 APN level load control
12.2.4.1 General
12.2.4.2 Justifications for APN load control support
12.2.4.3 Elements of APN load control Word‑p. 358
12.2.5 Load Control Information Word‑p. 359
12.2.5.1 Definition
12.2.5.1.1 General description
12.2.5.1.2 Parameters
12.2.5.1.2.1 Load Control Sequence Number
12.2.5.1.2.2 Load Metric Word‑p. 360
12.2.5.1.2.3 List-of-APN_and_Relative Capacity
12.2.5.1.3 Handling of parameters Word‑p. 361
12.2.5.2 Frequency of inclusion Word‑p. 362
12.2.5.3 Limit on maximum number of instances
12.2.6 Discovery of the support of the feature by the peer node
12.2.7 Issues in the network with partial support of the feature
12.3 Overload control solution Word‑p. 363
12.3.1 Principles of overload control
12.3.2 Applicability to 3GPP and non-3GPP access based interfaces
12.3.3 Node level overload control Word‑p. 364
12.3.4 APN level overload control
12.3.5 Overload Control Information
12.3.5.1 Definition
12.3.5.1.1 General description
12.3.5.1.2 Parameters Word‑p. 366
12.3.5.1.2.1 Overload Control Sequence Number
12.3.5.1.2.2 Period of Validity
12.3.5.1.2.3 Overload Reduction Metric Word‑p. 367
12.3.5.1.2.4 List of APNs
12.3.5.1.3 Handling of parameters Word‑p. 368
12.3.5.2 Frequency of inclusion
12.3.5.3 Limit on maximum number of instances Word‑p. 369
12.3.6 Propagating the MME/S4-SGSN identity to the PGW
12.3.7 Updating the PGW with overload control information of the target MME/S4-SGSN
12.3.8 The interaction with APN congestion control using the PGW Back-Off Time Word‑p. 370
12.3.9 Message throttling
12.3.10 Enforcement of overload control Word‑p. 374
12.3.10.1 General
12.3.10.2 Aspects related to enforcement of the overload control
12.3.10.2.1 Good throughput of the network
12.3.10.2.2 Message processing efficiency at the source GTP-C entity
12.3.10.2.3 Self-protection by the overloaded GTP-C entity
12.3.10.3 Enforcement of overload control between GTP-C entities in direct contact Word‑p. 375
12.3.10.4 Enforcement of overload control between remote GTP-C entities
12.3.11 Discovery of the support of the feature by the peer node
12.3.12 Issues in the network with partial support of the feature
12.3.13 Implicit overload control mechanisms
