tailieunhanh - IP-Based Next-Generation Wireless Networks phần 8

Nhà cung cấp NVSE-Type: Trường này chỉ ra các loại cụ thể của NVSE này. Một nhà cung cấp có thể chỉ định và sử dụng các loại khác nhau của NVSEs theo quyết định của mình. . Nhà cung cấp NVSE-Giá trị: Trường này có chứa dữ liệu nhà cung cấp / tổ chức cụ thể. Nó có thể chứa số không hoặc nhiều octet. | 284 MOBILITY MANAGEMENT Fig. 3GPP2 fast inter-PDSN handoff user traffic flow Fig. 3GPP2 fast inter-PDSN handoff signaling flow and user traffic flow MOBILITY MANAGEMENT IN 3GPP2 PACKET DATA NETWORKS 285 mobile and sends an A11 Registration Request to the selected target PDSN to establish an A10 connection for the mobile between the target PCF BSC and the target PDSN. The Home Address field of this A11 Registration Request will be set to the IP address of the mobile s serving PDSN. Recall that for intra-PDSN handoff or for regular inter-PDSN handoff the target PCF will set the Home Address field in the A11 Registration Request to zero. A nonzero Home Address field in the A11 Registration Request tells the target PDSN that a P-P connection should be set up between the target PDSN and the serving PDSN identified by the IP address in the Home Address field of the A11 Registration Request message in order to support fast inter-PDSN handoff for the mobile. The target PDSN replies immediately to the A11 Registration Request received from the target PCF BSC with an A11 Registration Reply message. The target PDSN then sends a P-P Registration Request message to the mobile s serving PDSN to request the serving PDSN to establish a P-P traffic connection for this mobile. If the mobile s serving PDSN accepts the P-P Registration Request it will Establish the requested P-P traffic connection . a GRE tunnel . Update its binding record for the mobile by creating an association between the identity of the mobile address of the target PDSN address of itself and the identifiers of the P-P connection for the mobile. Return a P-P Registration Reply message to the target PDSN. As we have discussed in Chapter 2 Wireless IP Network Architectures the P-P Registration Request and the P-P Registration Reply messages use the same formats as the MIPv4 Registration Request and MIPv4 Registration Reply messages Figures and . The Care-of Address Home Address and Home .