HUAWEI GGSN PDF

Physical Table x. Figure x. The UE — after configuring itself to the received link-local address — will send a Router Solicitation message right towards the GGSN, which will answer with a standard Router Advertisement message advertising an appropriate IPv6 networking prefix. Using this advertisement and the previously get link-local identifier, the UE is able to generate its global IPv6 unicast address for the IPv6 communication.

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Physical Table x. Figure x. The UE — after configuring itself to the received link-local address — will send a Router Solicitation message right towards the GGSN, which will answer with a standard Router Advertisement message advertising an appropriate IPv6 networking prefix. Using this advertisement and the previously get link-local identifier, the UE is able to generate its global IPv6 unicast address for the IPv6 communication.

QoS for an existing PDP context. Allocation and release of resources are also a task of GGSN. All the procedures shortly introduced above are taking part from the standard operations of a native IPv6 UMTS system, thus the implementation of these functions is mandatory for the basic GGSN functionalities.

However, we took advantages of some simplification possibilities during the design of our IPv6-capable GGSN software in order to reduce the development time and the requested human resources. These simplifications are mainly connected to the address allocation procedures and the QoS-regarded functions.

The management of different address pools and the QoS provisioning functions are also missing: pre-set link-local address, prefix and resources can only be assigned to the UE sending an Activate PDP context request message. All of these limitations will be precisely detailed in the next chapter, and will be eliminated in our future work. The following section describes the main adjustments and fixes we made along with the detailed limitations and known issues.

Therefore we had to implement the GGSN function of determining the type of context requests. Maintaining IPv6 PDP contexts: this problem is mainly handled by functions using a new structure in ggsn. IPv6 Router discovery messages: the interpretation of incoming IPv6 router discovery messages like Router Solicitations sent by the UE and the transmission of Router Advertisements is managed by the well known radvd [3] software.

Using a third party solution as radvd for this task makes our GGSN implementation a lot more simpleer router discovery procedures must not be implemented , but implies a serious limitation: one UE can get only one IPv6 prefix such obstructing the employment of several multihoming scenarios.

These should be replaced by ioctl commands in the future. As a part of our future work we are planning to integrate every router function into the GGSN itself such getting rid of the above limitation. Step No. These entire configuration steps along with our functional and performance measurement results are detailed in this Howto. Figure z. Configuring end user terminals User Equipments This chapter contains the most important technical details and the main configuration steps of all the User Equipments we tested during our native IPv6 UMTS experiments.

The following sources were used to retrieve technical information of devices:.

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Setting up native IPv6 UMTS access with open-source GGSN implementation

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HUAWEI GGSN PDF

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