Abstract: Systems and methods are disclosed for providing resilient flow control in the context of the Universal Mobile Telecommunication System (UMTS) and in other contexts. In one embodiment, a method is provided for managing access to a network resource such as a forward access channel. Upon receiving a request from an entity such as a radio network controller to use the network resource, a set of credits is allocated to the entity. Periodically, the credits that have been allocated are reviewed, and revoked if they have not been used within a predefined period of time.

Abstract: Enhanced throughput is achieved by using full concatenation of SDUs, SDU fragments, and STATUS PDUs within the protocol data units of a UMTS-based system.

Abstract: A data routing methodology where part of the data routing functionality is moved from a core network (CN) to a UTRAN (UMTS Terrestrial Radio Access Network) in a UMTS (Universal Mobile Telecommunication System) system when the communicating source and destination mobile equipments (ME) are residing inside that UMTS system. The separation of user data and signaling flows in such a situation decreases the load of the Iu interface between the UTRAN and the CN, thus decreasing the probability of congestion on this interface and resulting in availability of more Iu bandwidth. The signaling flow is still handled by the CN via the Iu interface, however the data flow is handled by the UTRAN via its internal Iur interface.

Abstract: A data routing methodology where part of the data routing functionality is moved from a core network (CN) to a UTRAN (UMTS Terrestrial Radio Access Network) in a UMTS (Universal Mobile Telecommunication System) system when the communicating source and destination mobile equipments (ME) are residing inside that UMTS system. The separation of user data and signaling flows in such a situation decreases the load of the Iu interface between the UTRAN and the CN, thus decreasing the probability of congestion on this interface and resulting in availability of more Iu bandwidth. The signaling flow is still handled by the CN via the Iu interface, however the data flow is handled by the UTRAN via its internal Iur interface.