3GPP TS 24301 PDF

3GPP TS (click spec number to see fileserver directory for this spec) Work item which gave rise to this spec: (click WI code to see Work Item details in . Encoding Messages Other Than TSMsg_PDU. .. the Methodology section, there are several PDU types defined for GERAN RRC messages (3GPP TS. The 3GPP scenarios for transition, described in [TR], can be Note 1: The UE receives the PDN Address Information Element [TS] at the end of.

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We recommend that future standardization efforts take this into account. Upon successful acceptance the UE receives access to services based on its subscription. We followed standard responsible disclosure practices of all affected manufacturers.

If the attach request is rejected due to NAS level congestion control, the network shall set the EMM cause value to 22 “congestion” and optionally assigns a back-off timer T Furthermore, even if individual app developers would fix their applications e.

The rules can be provisioned either in the home network or 3g;p in the visited network. We consider the following two angles to explain the trade-off.

By doing so, devices and applications that are IPv6 capable can start utilizing IPv6 connectivity. Hence, a significant loss is incurred to both network operators and their subscribers. Using social network and applications: In particular, we demonstrate the use of novel tracking techniques 42301 initially determine the TA and then exploit Smart Paging to identify a cell within that TA.

IPv6 in 3rd Generation Partnership Project (3GPP)

LTE-capable M2M devices which are not attended by technicians on a daily basis could be blocked out from network services for a long time. This also allows independent scaling, te of traffic throughput, and control-signal processing.

Figure 1 illustrates the APN-based network connectivity concept. Further embodiments of the invention are claimed in the dependent claims. Previously known attacks, such as the ability to track user movement were thought to be difficult in LTE. In particular, there is no need of mutual authentication and security contexts between the UE and network for accepting such reject messages.


This would prevent rogue network elements from sending false information, e. Status of This Memo This document is not an Internet Standards Track specification; it is published for informational purposes.

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The most relevant factor is ta the same as the reason for IPv6 not being deployed in other networks either, i. We carefully analyzed LTE access network protocol specifications and uncovered several vulnerabilities. Mapping tracking area and cell dimensions: Each area has its own pool of gateways that are dedicated to a 3gpo overlapping IPv4 address range also referred to as a zone.

All subscribers of an operator, and the subscribers’ enabled services, are provisioned rs the HLR. However, this is expensive. We reported our attacks to the manufacturers and carriers concerned as well as to the standardization body 3GPP. As IMSI is a permanent identifier of a subscriber, LTE specifications try to minimize its transmission in over-the-air radio communication for security and privacy reasons.

In addition, frequent unsuccessful Attach requests from UEs would increase signaling load on the network. Perceived security vs availability. Using passive attack setup, we sniff these priorities and configure our eNodeB accordingly. The RF unit may receive RF wireless signals, convert the received RF wireless signals to baseband signals, tts are processed by the baseband unit, or receive baseband signals from the baseband unit and convert the received baseband signals to RF wireless signals, which are later transmitted.

For our attacks, we exploit two of these: The user eventually accesses services in one or more PDNs. With subscriber growth projected to increase even further, and with recent depletion of available IPv4 address space by IANA, 3GPP operators and vendors are now in the process of identifying the scenarios and solutions needed to deploy IPv6. Architecture aspects of EHNB. Software and hardware used in major telecommunication systems have traditionally been proprietary closed source and expensive.


Early 2G systems were known to have several vulnerabilities. We performed a measurement study on LTE networks of three major operators to understand GUTI allocations, Smart Paging, and mapping of tracking area and cell dimensions for the purpose of examining the feasibility aspects of location leak attacks.

The attacker can utilize this broadcast information to configure the rogue eNodeB for malicious purposes. One of the national operators to whom we reported our findings, acknowledged the feasibility of our attacks and already configured their networks to prevent tracking based on GUTIs. We show that the equilibrium points in the trade-offs have shifted today compared to where they were when the LTE security architecture was being designed.

It provides the MS with a means of authenticating the network.

Sunday, November 20, Attach Complete. We noticed that there is no standard approach across different mobile operating systems to indicate the type of active network mode e. The Mobility Management Entity MME is a network element that is responsible for control-plane functionalities, including authentication, authorization, bearer management, layer-2 mobility, etc. Typically, the UE remains tw non-service state for some time period even if the 3vpp shuts down his rogue eNodeB or moves away from attacking area.

Impact of these attacks are as follows: Therefore, multi-homing within a single bearer is not possible.

The current generation of deployed networks can support dual-stack connectivity if the packet core network elements, such as the SGSN and GGSN, have that capability. It is a free library for software-defined radio mobile terminals and base stations. Provisioning of IP-based multimedia services.

Practical Attacks Against Privacy and Availability in 4G/LTE Mobile Communication Systems

CT1 part of Stage 3 BB1: This implies that GUTIs were not chosen randomly. Related to our passive attacks, we determined the average cell radius of a major operator in a city is meters for the 2.

Saturday, November 26, Authentication Response.