Content for TS 29.274 Word version: 19.3.0
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| p. 374
12.1 General p. 374
12.1.1 GTP-C overload problem p. 374
12.1.2 Scenarios leading to overload p. 374
12.1.3 Load & overload control concepts p. 375
12.2 Load control solution p. 375
12.2.1 Principles of load control p. 375
12.2.2 Applicability to 3GPP and non-3GPP access based interfaces p. 376
12.2.3 Node level load control p. 376
12.2.4 APN level load control p. 376
12.2.4.1 General p. 376
12.2.4.2 Justifications for APN load control support p. 377
12.2.4.3 Elements of APN load control p. 377
12.2.5 Load Control Information p. 378
12.2.5.1 Definition p. 378
12.2.5.1.1 General description p. 378
12.2.5.1.2 Parameters p. 379
12.2.5.1.3 Handling of parameters p. 380
12.2.5.2 Frequency of inclusion p. 381
12.2.5.3 Limit on maximum number of instances p. 381
12.2.6 Discovery of the support of the feature by the peer node p. 381
12.2.7 Issues in the network with partial support of the feature p. 382
12.3 Overload control solution p. 382
12.3.1 Principles of overload control p. 382
12.3.2 Applicability to 3GPP and non-3GPP access based interfaces p. 383
12.3.3 Node level overload control p. 383
12.3.4 APN level overload control p. 384
12.3.4.1 General p. 384
12.3.4.2 Elements of APN overload control p. 384
12.3.5 Overload Control Information p. 384
12.3.5.1 Definition p. 384
12.3.5.1.1 General description p. 384
12.3.5.1.2 Parameters p. 385
12.3.5.1.3 Handling of parameters p. 387
12.3.5.2 Frequency of inclusion p. 388
12.3.5.3 Limit on maximum number of instances p. 388
12.3.6 Propagating the MME/S4-SGSN identity to the PGW p. 388
12.3.7 Updating the PGW with overload control information of the target MME/S4-SGSN p. 389
12.3.8 The interaction with APN congestion control using the PGW Back-Off Time p. 389
12.3.9 Message throttling p. 390
12.3.9.1 General p. 390
12.3.9.2 Throttling algorithm - "Loss" p. 390
12.3.9.2.1 Description p. 390
12.3.9.3 Message prioritization p. 390
12.3.10 Enforcement of overload control p. 393
12.3.10.1 General p. 393
12.3.10.2 Aspects related to enforcement of the overload control p. 393
12.3.10.2.1 Good throughput of the network p. 393
12.3.10.2.2 Message processing efficiency at the source GTP-C entity p. 393
12.3.10.2.3 Self-protection by the overloaded GTP-C entity p. 394
12.3.10.3 Enforcement of overload control between GTP-C entities in direct contact p. 394
12.3.10.4 Enforcement of overload control between remote GTP-C entities p. 394
12.3.10.4.1 Description p. 394
12.3.11 Discovery of the support of the feature by the peer node p. 394
12.3.12 Issues in the network with partial support of the feature p. 395
12.3.13 Implicit overload control mechanisms p. 395
