# US 2014/0207809 A1 · Access Management Method, Device and System > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0207809 A1 - Document ID: US20140207809A1 - Status: Published application - Kind: A1 - Application number: 14/238,904 - Filed: 2012-05-18 - Published: 2014-07-24 - Earliest claimed: 2011-08-16 - Assignees: Zte Corporation - Inventors: Chaofeng Zhang; Xiaojiu Tong; Wei Chen; Junbao Zhong - Web page: https://patentgrep.com/patent/US20140207809A1 ## CPC - G06F 16/245: Query processing - G06F 16/23: Updating - G06F 16/84: Mapping; Conversion - G06F 16/9017: {using directory or table look-up (use of a directory or look-up table in file systems G06F16/13)} - H04W 64/00: Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management - H04L 61/103: across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP] - H04L 61/5084: Providing for device mobility (network addressing or numbering for mobility support in wireless networks H04W8/26; mobile IP H04W80/04) - H04W 80/04: Network layer protocols, e.g. mobile IP [Internet Protocol] - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract An access management method, device and system are disclosed. It relates to the field of communication; and the problem that the existing update mechanism of an AID and RID mapping relationship table has a low reliability and influences the network working efficiency is solved. The method includes: when detecting that an MN accessing an ASR is offline, the ASR querying a local AID and Routing Identity RID mapping table, and determining a correspondent node of the offline MN; and the ASR sending a mapping table entry update message to an ILR and an ISR and an ASR where the correspondent node is located, and setting an RID in a mapping table entry corresponding to the MN to be NULL, which represents that the MN does not access the ASR currently. ## Claims ### Claim 1 An access management method, comprising: when detecting that a Mobile Node (MN) accessing an Access Switching Router (ASR) is offline, the ASR querying a local Access Identity (AID) and Routing Identity (RID) mapping table, and determining a correspondent node of the offline MN; and the ASR sending a mapping table entry update message to an Information Logging Router (ILR) and an Internet Interface Service Router (ISR) and an ASR where the correspondent node is located, and setting an RID in a mapping table entry corresponding to the MN to be NULL, which represents that the MN does not access the ASR currently. ### Claim 2 (depends on 1) The access management method according to claim 1, further comprising: the MN reaccessing any ASR, the ASR registering a new mapping table entry to the ILR, and establishing a mapping relationship between an RID of the ASR and an AID of the MN. ### Claim 3 An access management method, comprising: receiving a mapping table entry update message sent by an ASR, wherein, the mapping table entry update message indicates to set an RID in a mapping table entry corresponding to an MN to be NULL, which represents that the MN does not access the ASR currently; updating the locally stored RID in the mapping table entry corresponding to the MN to be NULL; and when an RID corresponding to a destination AID of a locally received message is NULL, discarding the message. ### Claim 4 (depends on 3) The access management method according to claim 3, wherein, receiving a mapping table entry update message sent by an ASR is: an ISR and/or other ASRs except the ASR receiving the mapping table entry update message sent by the ASR. ### Claim 5 (depends on 4) The access management method according to claim 4, wherein, after a step of updating the locally stored RID corresponding to the AID corresponding to the MN to be NULL, the method further comprises: setting an aging timer for the mapping table entry corresponding to the MN, and starting timing after updating the mapping table entry; and after the aging timer times out, locally deleting the mapping table entry. ### Claim 6 (depends on 4) The access management method according to claim 4, wherein, the method further comprises: when a mapping table entry corresponding to the destination AID of the received message is not found, sending a message for requesting the mapping table entry corresponding to the destination AID to an ILR; and receiving the mapping table entry corresponding to the destination AID of the message returned by the ILR. ### Claim 7 (depends on 4) The access management method according to claim 4, wherein, the method further comprises: when a mapping table entry corresponding to the destination AID of the received message is not found, sending a message for requesting the mapping table entry corresponding to the destination AID to an ILR; and when the ILR replies that the mapping table entry corresponding to the destination AID does not exist, generating a temporary mapping table entry of the destination AID, setting the RID corresponding to the destination AID to be NULL, and setting an aging timer for the temporary mapping table entry. ### Claim 8 An access management method, comprising: an ILR receiving a mapping table entry update message sent by an ASR, wherein, the mapping table entry update message indicates to set an RID in a mapping table entry corresponding to an MN to be NULL, which represents that the MN does not access the ASR currently; updating the locally stored RID in the mapping table entry corresponding to the MN to be NULL; and when a message for requesting the mapping table entry corresponding to the MN is received, sending a response message, and carrying the mapping table entry corresponding to the MN in the response message, wherein, the RID recorded in the mapping table entry is NULL. ### Claim 9 (depends on 8) The access management method according to claim 8, further comprising: the ILR receiving a mapping table entry update message sent by an ASR which the MN reaccesses, wherein, a mapping table entry recording a mapping relationship between an AID of the MN and an RID of the reaccessed ASR is included in the mapping table entry update message; and the ILR updating the mapping table entry corresponding to the MN to the mapping table entry in the mapping table entry update message, and informing an ISR and all the ASRs of a new mapping table entry corresponding to the MN. ### Claim 10 (canceled) ### Claim 11 (canceled) ### Claim 12 (canceled) ### Claim 13 (canceled) ### Claim 14 (canceled) ### Claim 15 (canceled) ### Claim 16 (canceled) ### Claim 17 (canceled) ### Claim 18 An access management system, comprising: a first access management device, a second access management device and a third access management device; the first access management device is configured to: when detecting that an MN accessing the first access management device is offline, query a local AID and RID mapping table, determine a correspondent node of the offline MN, send a mapping table entry update message to the second access management device and the third access management device, and set an RID in a mapping table entry corresponding to the MN to be NULL, which represents that the MN does not access an ASR currently; and the second access management device is configured to: receive the mapping table entry update message sent by the first access management device, update the locally stored RID in the mapping table entry corresponding to the MN to be NULL, and when an RID corresponding to a destination AID of a locally received message is NULL, discard the message; and the third access management device is configured to: receive the mapping table entry update message sent by the first access management device, update the locally stored RID in the mapping table entry corresponding to the MN to be NULL, and when a message for requesting the mapping table entry corresponding to the MN is received, send a response message, and carry the mapping table entry corresponding to the MN in the response message, wherein, the RID recorded in the mapping table entry is NULL. ### Claim 19 (depends on 18) The access management system according to claim 18, wherein, the second access management device is further configured to: set an aging timer for the mapping table entry corresponding to the MN, and start timing after updating the mapping table entry, and after the aging timer times out, locally delete the mapping table entry. ### Claim 20 (depends on 19) The access management system according to claim 19, wherein, the second access management device is further configured to: when a mapping table entry corresponding to the destination AID of the received message is not found, send a message for requesting the mapping table entry corresponding to the destination AID to the third access management device, and receive the mapping table entry corresponding to the destination AID of the message returned by the third access management device, or, when the third access management device replies that the mapping table entry corresponding to the destination AID does not exist, generate a temporary mapping table entry of the destination AID, set the RID corresponding to the destination AID to be NULL, and set the aging timer for the temporary mapping table entry; the third access management device is further configured to: when a message for requesting the mapping table entry corresponding to the MN is received, send a response message, and carry the mapping table entry corresponding to the MN in the response message, wherein, the RID recorded in the mapping table entry is NULL. ### Claim 21 (depends on 18) The access management system according to claim 18, wherein, the third access management device is further configured to: receive a mapping table entry update message sent by an ASR which the MN reaccesses, wherein, a mapping table entry recording a mapping relationship between an AID of the MN and an RID of the reaccessed ASR is included in the mapping table entry update message; update the mapping table entry corresponding to the MN to the mapping table entry in the mapping table entry update message, and inform the second access management device of a new mapping table entry corresponding to the MN.