This document summarizes requirements for multicast listener support in Proxy Mobile IPv6 (PMIPv6) scenarios. In correspondance to PMIPv6, multicast mobility management requirements do not request any active participation of the mobile node.

This paper proposes a mechanism to secure the mobile IPv6 networks by integrating identity based cryptosystem with cryptographically generated address. Based on an in-depth analysis of attacks and countermeasures in the CGA-based protocols, this paper gives an analysis of the so called "unauthentic key attacks", and presents a mechanism to solve this problem by integrating an IBC scheme called Combined Public Key (CPK) with CGA. Both the deployment considerations and performance analysis of this IBC-CGA scheme are present in the paper.

Recently, the interworking of 3G and 802.11 wireless data networks has become a very hot topic. These two kinds of networks have relatively mutual complementary features. The seamless integration of these two networks can surely improve the service availability and flexibility if the end users could do roaming across heterogeneous networks with simple multiple-interface terminals. In this paper, our solution of 3G/802.11integration is expatiated in detail. The solution includes four main nodes: a smart home agent, an 802.11 gateway called PDIF, a 3G gateway called PDSN and a multiple-interface terminal without mobile IP stack. The mobility scheduling module inside the home agent could do the packets scheduling and mobility notification in accord with the handover situations and local policies. The enhanced Mobile IP stack in PDIF and PDSN could work in proxy mode, which could provide mobility support for mobile terminals without mobile IP stack. The detailed description is made on home agent, PDIF, PDSN and mobile terminals. We also present the system performance testing result.

The interworking of CDMA2000 and WLAN networks has recently become a hot issue. Mobile nodes with multiple interfaces also look promising. However, provision of seamless handoff between heterogeneous networks with QoS guarantee remains a challenge. In this paper we propose a solution for smart seamless handoff with QoS guarantee for CDMA2000 and WLAN interworking. In our proposal, mobile nodes conduct the QoS negotiation with the new network during handoff. Based on the results, on QoS requirements of current sessions and on local policies, mobile nodes could transfer selected sessions to the new interface. Decisions are notified to the network side by mobile IP registration request messages

A method of video stream evaluation and test performance based on Ethernet-PON (passive optical network) was proposed. The IP-based video service or so called IPTV has emerged as the most promising network technology and its QoS (quality of service) has becoming a key concern in access network. The paper gives the performance evaluation of unicast and multicast video stream with different flux. Detailed experiments are presented to validate the effectiveness of diff-flux video streams transmission. The experiment results show that the evaluation closely approximates to the expectant ones.

IEEE 802.11 Wireless LAN (WLAN) has been enthusiastically adopted in business offices, homes, and other spaces, for both public and private wireless local network connection. The users would like to deploy Voice IP (VoIP) and Video Phone based on Mobile IPv6 Protocol over Wireless LAN network. However, the frequent change in the mobile node’s location causes evident signaling overhead, handover latency and packet loss, which in turn leads to the service degradation of real time traffic in Mobile IPv6. In this paper, we propose a scheme based on Wireless LAN by adding a new component called Handover Control Function (HCF) in MIPv6, which records all APs’s MAC address, backend ARs’ address and network prefix of those AP’s. By the means that all Mobile Nodes (MNs) report periodically all AP’s MAC address and signal strength information to HCF which MN can probe, HCF decides whether or which AP MN shall associate with and notifies MN about the new AP/AR’s information, meanwhile, a bi-cast mechanism shall be applied to further improve handover performance by reducing the packet loss during handover.

SIP-based multi-party conference service (MPCS) of IETF is adopted by 3GPP2 as conferencing solution. In MPCS, the service content received by multiple participants is the same. So, it is better to use multicast to support MPCS in 3G network, where air resources are limited. In 3GPP2, broadcast multicast service (BCMCS) is standardized allowing optimization of air resources for delivery of uniform content to multiple access ten-ninals in CDMA2000 communication system. In this paper, a new solution is proposed, wherein service mapping is set up between BCMCS and MPCS in CDMA2000 network. By utilizing BCMCS, the radio and access network's resources of the CDMA systems could be saved for MPCS.

Three hierarchical mobile IP (Internet protocol) schemes to improve the handoff performance of mobile IP, i.e. hierarchical mobile IP, distributed and dynamic hierarchical mobile IP and chained foreign agent hierarchical mobile IP were introduced. An analysis model based on one-dimensional random walk model was also proposed to derive the signaling transmission cost, the packet delivery cost and the total handoff cost of the three schemes. The performances of the three schemes were compared in detail based on the model, and the effects of different home handoff thresholds on the costs were discussed. Numerical results show that the chained foreign agent hierarchical mobile IP scheme outperforms the other two under small home handoff threshold.

Mobile users expect similar kinds of applications to static ones, including various IP multicast applications. In mobile environment, the multicast tree should face with not only the dynamic group membership problem but also the mobile node’s position change issue. In this paper, we study the stability of IP multicast tree in mobile environment. We define a stability factor and investigate how the various elements of network and mobility impact on it. It is shown that the stability factor is mainly dominated by three elements, namely the ratio of the number of mobile nodes and network size, mobility model and the mobile multicast scheme. These results can give some useful references when we design a new mobile multicast scheme in the future.

The invention is a mobile IPv6 network which has many distributed recurrent agents and a method of balancing the loads of these agents of it, where it includes many mobile subnets interconnected by Internet, each mobile subnet includes: an access router, many mobile nodes and many recurrent agents; the recurrent agents are arranged in distributed topology and depend on mutual broadcast of flow load information (list) and exchange the information. And each recurrent agent has a flow load list and balances the load by the method of the invention according to the flow load list.

A handoff method of wireless LAN comprises the steps of: 1) immediately starting by a mobile terminal to count time from a time point of entering the wireless LAN or building the new association, that is, when building association with a certain access point; 2) always tracking a signal-to-noise ratio (SNR) of the old access point by the mobile terminal, and once the mobile terminal starts getting weak, starting to search for a near access point and making a preparation for handoff, and issuing a probe request signal to a new access point, and always responding to a probe response message by the new access point after receiving the probe request signal; and 3) judging by the mobile terminal whether or not to associate the new access point according to a signal strength and an association time of each of the access points, and if a judging result is yes, issuing the reassociation request signal to the new access point. Accordingly, the new access point issues a reassociation response message to build the new association.

Mobile communication is playing an increasing role in our lives. Mobile users expect similar kinds of applications to static ones. Multicast not only brings attractive applications, but also has the benefit of saving scarce bandwidth in wireless environment. In order to achieve efficient multicast in mobile networks, we propose an agent-based scheme called Mobile Multicast with Fast Handoff and Hierarchical Architecture (FHMM). This scheme introduces two kinds of agents: Multicast Agent (MA) and Domain Multicast Agent (DMA). Through the cooperation between MAs in adjacent networks, FHMM accomplishes fast multicast handoff. And through the use of DMA, FHMM achieves a hierarchical mobile multicast architecture which can isolate the local movement from outside and improve the stability of the main multicast delivery tree. The simulation results show that FHMM is effective with low packet loss rate, high multicast packet delivery efficiency and little multicast maintenance overhead.

Context-aware QoS control in session-based IP networks is proposed. This work proposed the basic architecture and algorithm of context-aware SIP-QoS server that can control QoS for each session or media stream, based on context information including IP flow information, media type, user presence, and user preference. QoS applications with context-aware QoS control in session based networks are also proposed.

The performance of handoff initiation algorithm is one of the key issues for providing roaming capability in wireless LAN (WLAN). In this paper, we propose a new handoff initiation algorithm for data transmitting in WLAN. Our proposal combines association time, system load and signal/noise ratio (SNR) together to decide whether mobile node should handoff or not. The goal is to reduce the number of unnecessary handoff, decrease packet loss and balance the system load. In this way, we can provide quality of service (QoS) guarantee. Simulation results show that the proposed handoff initiation algorithm is efficient in WLAN.

Mobile IPv6 is a key technology in IPv6 to support the mobility of wireless communication terminals. In mobile IPv6, home agents (HAs) are responsible for the registration of mobile nodes (MNs) in the home network, and tunneling the data packets to the MNs when the MNs are not reachable through its home IP addresses. However recent research shows that the traffic bottleneck could be formed at a HA. When the HA experiences high intensity of the tunneled traffic and the MH registration information. In this paper, we propose a hybrid load balance mechanism which takes account of not only the MN registration information but also the tunneled data traffic information to effectively release and prevent the formation of the traffic bottleneck at the HA. We show that the proposed mechanism can be implemented in mobile IPv6 without changing the protocols of the communication between HAs and MNs in IETF MIPv6 draft. Simulation shows that our proposed algorithm can reduce the traffic delay substantially and the buffer requirements during the tunneling traffic phase in mobile IPv6.