Handover

About: Handover is a research topic. Over the lifetime, 24219 publications have been published within this topic receiving 296416 citations. The topic is also known as: handoff.

Method in a radio network node for controlling handover decision of a user equipment

Abstract: The present disclosure relates to a method for use in a radio network node, and a radio network node (2, 4, 4', 100), for improved control of handover decisions of a UE (6) being in a served cell (3) of a wireless communications network (1). The UE (6) is in a served cell (3) and moving towards a neighbouring cell (5, 5'). According to embodiments, neighbouring cell characteristics are obtained and a mobility threshold is determined based on the obtained neighbouring cell characteristics. The handover decision(s) of the UE to the neighbouring cell are then controlled based on the determined mobility threshold.

Wireless communication method and system for performing handover between two radio access technologies

Abstract: The present invention relates to a method and apparatus for performing handover between a universal mobile telecommunication system (UMTS) terrestrial radio access network (UTRAN), and an evolved-UTRAN (E-UTRAN) based system. The wireless communication system includes a UTRAN, an E-UTRAN, a 2G/3G core network, and long term evolution (LTE) core network, and at least one wireless transmit/receive unit (WTRU) including an LTE element and ad 2G/3G element. According to the present invention the WTRU shall be able to handover a call initiated on the UTRAN to the E-UTRAN, and visa versa. The 2G/3G core network and the LTE core network are linked by a Gn interface.

Network evolution and QOS provisioning for integrated femtocell/macrocell networks

Abstract: Integrated femtocell/macrocell networks, comprising a conventional cellular network overlaid with femtocells, offer an economically appealing way to improve coverage, quality of service, and access network capacity. The key element to successful femtocells/macrocell integration lies in its self-organizing capability. Provisioning of quality of service is the main technical challenge of the femtocell/macrocell integrated networks, while the main administrative challenge is the choice of the proper evolutionary path from the existing macrocellular networks to the integrated network. In this article, we introduce three integrated network architectures which, while increasing the access capacity, they also reduce the deployment and operational costs. Then, we discuss a number of technical issues, which are key to making such integration a reality, and we offer possible approaches to their solution. These issues include efficient frequency and interference management, quality of service provisioning of the xDSL-based backhaul networks, and intelligent handover control.

Wireless communication handoffs within a macrocell

Abstract: Handoffs within a wireless communication system (20) include using a common cell definition code for each of a plurality of microcell BTSs (30, 40, 50) to facilitate handoffs between a macrocell (26) and any one of the microcells. In a disclosed example, a common cell definition code such as a PN offset or a scrambling code is used to trigger a handoff from the macrocell (26) to any one of the microcell BTSs (30, 40, 50). A mobile station locate feature identifies which of the BTSs is involved in the handoff. Another common cell definition code is used in one example to trigger all handoffs from any one of the microcells (30, 40, 50) to the macrocell (26). Soft handoff and hard handoff examples are disclosed.

Method and apparatus for determining a need to handoff a mobile communication signal in a wireless communication system

Abstract: In a wireless communication system, which includes a first base site (101) having an associated controller (130) and a second base site (108), a mobile station (103) responsive to the first and second base site, a method for determining a need to hard handoff a mobile communication signal (107) associated with the mobile station from the first base site to the second base site is disclosed. The method includes receiving a plurality of hard handoff candidate parameters associated with the mobile communication signal, and then measuring a plurality of scan result parameters associated with the mobile communication signal by a handoff scan receiver (304). The method further includes forwarding the plurality of scan result parameters to the controller, and then determining whether or not a hard handoff of the mobile communication signal is required based on the scan result parameters.