Showing papers on "Paging published in 2003"

Method for transmitting and receiving control messages in a mobile communication system providing MBMS service

Abstract: A communication system providing a multimedia broadcast/multicast service (MBMS). Control message to be transmitted to user equipments (UEs) desiring to receive the MBMS service, paging message including information indicating an operation of transmitting a response to the paging message received, is transmitted to the UEs, and thereafter, the control information corresponding to the paging information is transmitted, thereby minimizing interference and use of uplink resource.

Movement-based mobility management and trade off analysis for wireless mobile networks

Abstract: Mobility management plays a central role in providing ubiquitous communications services in future wireless mobile networks. In mobility management, there are two key operations, location update and paging, commonly used in tracking mobile users on the move. Location update is to inform the network about a mobile user's current location, while paging is used for the network to locate a mobile user. Both operations will incur signaling traffic in the resource limited wireless networks. The more frequent the location updates, the less paging in locating a mobile user; thus, there is a trade off in terms of signaling cost. Most trade off analysis in the literature is carried out under the assumption that some time variables are exponentially distributed. However, such assumptions will not be valid, particularly for the wireless Internet. In this paper, we present some general analytical results without these assumptions, which are essential for the general trade off analysis. Specifically, we analytically derive the average number of location updates during the interservice time for a movement-based location update scheme under fairly realistic assumptions, which are crucial for all trade off analysis. Our general analytical results make thorough numerical analysis for finding the optimal mobility management under various network operation scenarios possible.

Multimedia broadcast and multicast service paging

Abstract: This invention provides a paging method for Multimedia Broadcast/Multicast Service in mobile communication system. The paging process and radio resource setup process are merged in this method to try to reduce uplink responses. This invention extends existing PCH IubFP frame structure by adding MBMS Indication bit(MI) to PCH IubFP frame. The PCH IubFP frame includes Paging Indication (PI) and Paging Message. Paging message carries MBMS service information. MBMS Service Identity or MBMS Paging Indicator is added to the reserved 12 bits in Paging Indicator Channel (PICH) frame structure. Radio Network Controller (RNC) transfers Paging Indicator Message and paging message to Base Station (Node B) so as to send over the air-interface.

Method and system for selectivity reducing call-setup latency through management of paging frequency

Abstract: A method and system for selectively reducing call-setup latency. The method and system provides for selectively increasing the paging frequency used for paging certain mobile stations, so as to decrease the time that it takes to establish radio-link connectivity with those mobile stations. The method and system is particularly useful when establishing real-time communication sessions, such as instant chat sessions, but may be useful in other scenarios as well.

Method and apparatus for efficient paging and registration in a wireless communications network

Abstract: Method and apparatus for optimizing registration and paging in a group communication system use mobility of the mobile stations (104, 106) to minimize the frequency of registrations performed by the mobile stations as well as the area of paging the mobile stations. When the mobile stations have a low mobility status, the base station (110) reduces the area of paging the mobile stations so that the paging channel load is reduced.

Management of packet-based audio devices within acoustic spaces

Abstract: A system includes multiple packet-based communication devices that support audio output and other suitable functionality and an acoustic space management device that manages these devices to provide telephony services within acoustic spaces. These devices can coordinate their actions to provide audio services, such as conferencing, paging, broadcasting, and other appropriate audio services.

Method and system for reducing latency when initiating real-time media sessions

Abstract: A method and system for reducing latency in establishment of a real-time communication session, such as an instant chat session for instance. The method and system provides for buffering an initial real-time media signal until a transmission path exists to send the signal along its way toward a receiving station. Upon establishment of the transmission path, the signal may then be sent along its way. Further, the method and system may provide for selectively increasing the paging frequency used for paging certain mobile stations, so as to decrease the time that it takes to establish radio-link connectivity with those mobile stations.

Improving energy saving in wireless systems by using dynamic power management

Abstract: We develop a novel approach for conserving energy in battery-powered communication devices. There are two salient aspects to this approach. First, the battery-powered devices move through multiple, progressively deeper, sleep states in a predictable manner. Nodes in deeper sleep states consume lower energy while asleep, but incur a longer delay and higher energy cost to awaken. Second, the nodes are woken up on demand through a paging signal. To awaken nodes that are in deep sleep, the paging signal has to be decoded using very low power circuits such as those used in radio frequency tags. To accommodate this need, in a manner that scales well with the number of nodes, the number of distinct paging signals has to be much less than the number of possible nodes. This is accomplished through a group-based wakeup scheme, which initially awakens the targeted node along with a number of other similarly disposed nodes that subsequently return to their original sleep state. Tradeoffs among energy consumption, delay and overhead are presented; comparisons with other protocols show the potential for 16% to 50% improvement in energy consumption.

Paging incommunication systems

Abstract: The present invention refers to methods and systems for enabling paging and DRX in a hybrid cellular communication system comprising a core network (CN) and radio access network (RAN) employing different paging techniques. The core network is accociated with a DRX parameter of a CN associated parameter set, which according to the invention, is mapped to a value of a RAN associated parameter set. This resulting value may then be used by the radio access network and/or a mobile station for determining a present paging period of the mobile station. Furthermore, methods of selecting DRX parameters for a mobile station in different operational modes are provided. The invention is particular applicable to a communication system including a GERAN radio access network operating in Iu mode.

Method and apparatus for delivering multimedia multicast services over wireless communication systems

Abstract: A method is provided for delivery of Multimedia Broadcast and Multicast Service (MBMS) over wireless systems (S6, S4). The method optimizes the number of paging messages sent over the air interface in order to enhance the overall system capacity. MBMS active Mobile Station User Equipments (UEs) track their locations (S2, S3) to the granularity of a cell based on information sent by the system.

Systems and methods for the efficient reading of data in a server system

Abstract: The invention is related to methods and apparatus that efficiently store and read data in a cache for a server system, such as a media server. The cache stores data for file formats of a streamable file format, such as an MPEG-4 file format. Relatively frequently accessed portions of a streamable file format are maintained with long-life links. For example, selected child atoms of sample table atoms of MPEG-4 file formats can be relatively frequently accessed during the streaming of a media presentation. A virtual address space manager for selected child atoms maintains relatively long-life links to pages or segments of data in a cache that hold data corresponding to these child atoms and can advantageously inhibit the release of these segments to enhance a hit rate for the cache and decrease an amount of thrashing, i.e., repeated paging of data to the cache.

Traffic management system and method for multi-carrier CDMA wireless networks

Abstract: A method and system for managing traffic in multi-carrier wireless communications systems is disclosed in which a paging channel of an overlay carrier frequency cell in the multi-carrier wireless communication system is eliminated. A sync channel of the overlay frequency cell is modified to direct idle mobile units served by the overlay carrier frequency cell to monitor a paging channel of an underlying carrier frequency cell. A traffic allocation algorithm is used to assign a traffic channel carrier frequency to the mobile units.

Method for coordinating paging occasions on a common paging channel

Abstract: A method of paging a plurality of users by synchronizing user equipment (UE) specific paging and Point-to-Multipoint (PtM) user group paging to reduce power consumption when the UE is in a discontinuous reception state. The UE identities are defined such that paging occasions and common paging channels are synchronized for multiple users within a PtM user group.

Paging and registration in cellular networks: jointly optimal policies and an iterative algorithm

Abstract: This paper explores optimization of paging and registration policies in cellular networks. Motion is modeled as a discrete-time Markov process, and minimization of the discounted, infinite-horizon average cost is addressed. The structure of jointly optimal paging and registration policies is investigated through the use of dynamic programming for partially observed processes. It is shown that there exist policies with a certain simple structure that are jointly optimal, though the dynamic programming approach does not directly provide an efficient method to find the policies. An iterative algorithm for policies with the simple form is proposed and investigated. The algorithm alternates between paging policy optimization and registration policy optimization. It finds a pair of individually optimal policies, but an example is given showing that the policies need not be jointly optimal.

Method of paging mobile stations, and equipment for implementing that method

Abstract: An infrastructure of a radiocommunication network transmits mobile station paging messages. Each paging message transmitted is preceded by a paging indication message comprising paging indication information identifying a mobile station intended to receive a request contained in the paging message. The paging indication message further comprises a repetition indication field to indicate whether the paging message contains at least one request already contained in a previously transmitted paging message.

Method for dynamically allocating and managing resources in a computerized system having multiple consumers

Abstract: Method for dynamically allocating and managing resources in a computerized system managed by an operating system (OS) and having multiple accounts of consumers. Portions of the virtual memory address space are allocated, whenever desired, in a swap file, for each account associated with a consumer. The memory address space is limited for each account. The CPU usage is divided between the tasks requested from each account, andsegments in the original code of the OS are changed by locating one or more specific procedures in the original code, and modifying the specific procedures to operate according to the allocation and/or the limitation of the memory address space and/or the limitation of the number of processes and/or the divided CPU usage.

Paging apparatus and method for MBMS service in a mobile communication system

Abstract: A method for paging user equipments (UEs) receiving a second service in a mobile communication system providing a first service and the second service. A serving General Packet Radio Service (GPRS) support node (SGSN), determines an identifier indicating the second service and a coefficient related to paging occasions for transmitting a paging instance indicating presence/absence of paging information related to the second service in response to a request for the second service from UEs, and transmits the determined identifier and coefficient to a radio network controller (RNC). The RNC transmits the identifier and the coefficient to the UEs, determines the paging occasions and transmission times of the paging instance in each of the paging occasions by using the identifier and the coefficient, and transmits the paging instances over a first channel at the transmission times of the paging instances for each of the paging occasions so that the UEs recognize presence/absence of the paging information.

Method for transmitting paging information for broadcast service in an MBMS mobile communication system

Abstract: Disclosed is a method for transmitting a paging message for a broadcast service in a mobile communication system having a plurality of user equipments (UEs), a plurality of cells where the UEs are located, a Node B occupying the cells, and a radio network controller (RNC) controlling the Node B, the system providing the broadcast service transmitted from a core network to the UEs via the RNC. In the method, the core network transmits information on UEs in a connected mode among UEs desiring to receive the broadcast service to the RNC along with the paging message for the broadcast service.

Mobile communication system, mobile switching station for the system, and mobile station for the system

Abstract: PROBLEM TO BE SOLVED: To provide a mobile communication system wherein the paging period is made variable and set longer so as to reduce the power consumption of a mobile station, thereby extending the operating time of the battery of the mobile station. SOLUTION: A network side varies a paging transmission period 12 and sets the period longer, and the mobile station awaits paging in matching with the period, resulting in increasing a sleep state. Further, the network side informs a caller of a caller side about a connection required time message 14 corresponding to the paging transmission period. COPYRIGHT: (C)2004,JPO&NCIPI

Method and system for transmission of real-time kinematic satellite positioning system data

Abstract: A method and system for communication in a real-time kinematic (RTK) positioning system by paging. An RTK positioning system having a reference station and a rover utilizes a paging system for data transfer. A single satellite positioning system (SATPS) reference station may be coupled to the paging system to provide RTK correction data, or multiple networked reference stations may be coupled to the paging system to provide data. Paging systems using allocated paging bands having fixed width channels (e.g. 20 kHz) such as those between 35 MHz and 36 MHz or 43 MHz and 44 MHz may be used.

Accurate modeling of cache replacement policies in a data grid

Abstract: Caching techniques have been used to improve the performance gap of storage hierarchies in computing systems. In data intensive applications that access large data files over wide area network environment, such as a data grid, caching mechanism can significantly improve the data access performance under appropriate workloads. In a data grid, it is envisioned that local disk storage resources retain or cache the data files being used by local application. Under a workload of shared access and high locality of reference, the performance of the caching techniques depends heavily on the replacement policies being used. A replacement policy effectively determines which set of objects must be evicted when space is needed. Unlike cache replacement policies in virtual memory paging or database buffering, developing an optimal replacement policy for data grids is complicated by the fact that the file objects being cached have varying sizes and varying transfer and processing costs that vary with time. We present an accurate model for evaluating various replacement policies and propose a new replacement algorithm referred to as least cost beneficial based on K backward references (LCB-K).

Dynamic Location Management for Mobile Computing

Abstract: This paper presents a dynamic and individualized location update scheme that considers each user's mobility patterns. The mobility patterns are used to create individualized location areas for each user. The proposed scheme is flexible and can be used in network with arbitrary cell topologies. The scheme, along with other existing schemes is simulated using realistic users' mobility and call arrival patterns, and network topology. The simulated environment consists of 90 cells representing the geographical area of the San Francisco bay, and 66,550 mobile users representing the typical classes of users that are normally present in a real cellular network. Results show the proposed scheme gives lower overall signaling costs, resulting in savings on the limited radio bandwidth that may have otherwise been used for location updates and paging.

Navigation system using a paging channel and a method for providing traffic information

Abstract: A navigation system utilizing a paging channel of a mobile communication service for a navigation apparatus including a mobile communication function is disclosed, which comprises: a BSC-based traffic server for periodically extracting/synthesizing traffic information in an area of a BSC, and then transmitting the traffic information of a peripheral area including the BSC; and a BSC for inserting the traffic information received from the BSC-based traffic server into the paging channel for a mobile communication terminal, and then transmitting it. In the navigation system, traffic conditions information in a corresponding area is transmitted by means of a paging channel, thereby utilizing real time traffic information while maintaining the architecture of the existing mobile communication network without an additional apparatus and communication cost.

Communications security methods for supporting end-to-end security associations

Abstract: Methods and apparatus facilitating mobile node paging in a system where a mobile node is able to hand off application processing to an application proxy are described. Paging determinations are made based on application processing results corresponding to processing the content of multiple packet payloads. In some cases paging determinations are made based on processing the payload of a single packet in conjunction with information received from a mobile node, e.g., intermediate application processing results, mobile node state information, etc. To facilitate application processing handoffs in a manner that is transparent to a peer node involved in an ongoing communications session with the mobile node, security information may be passed between the mobile node and the application proxy node in a manner that is transparent to the peer node allowing an end to end security association to be maintained throughout the communications session with the peer node.

Method and transceiver apparatus for transmitting paging information in orthogonal frequency-division multiplexing systems

Abstract: The present invention provides a method for transmitting paging information in orthogonal frequency-division multiplexing (OFDM) systems as well as the transmitter and receiver apparatus for its application. The method features itself in the following aspects: An auxiliary paging channel is employed dedicatedly for spread-spectrum modulation or digital modulation of the paging information. When the receiver is in a standby state, paging information can be obtained by means of spread spectrum demodulation or digital demodulation with no need to conduct FFT. This leads to a great reduction in power consumption and less power is consumed when the receive devices are in standby state, hence achieving aim to lengthen the usable time of a battery in a mobile phone.

Mobile communication system, radio terminal used therefor, radio network controller and operation control method therefor

Abstract: It is an object of the present invention to eliminate congestion of radio channels due to paging in paging processing in a service of an MBMS to prevent UEs using other services from being affected by the congestion. The present invention uses a TMGI (Temporary Mobile Group Identify), which is an identifier peculiar to an MBMS service, instead of an IMSI, which is an identifier peculiar to a UE, to prepare a paging message on the basis of this TMGI and determine a Paging Occasion (transmission frame timing of a PICH) and a PI bitmap. Consequently, since it becomes possible to send the paging message with a group of UEs subscribing to an identical MBMS service as a unit, congestion of radio channels due to the transmission of the paging message is eliminated.

Method and apparatus for efficient channel assignment

Abstract: To address the need for efficiently performing channel assignment in a manner that reduces call setup time, the present embodiments provide an abbreviated channel assignment message (300) that references information stored by a remote unit (113). The information that is referenced can be removed from the message. By shrinking the channel assignment message in this manner, the present embodiment allows it to be transmitted in a paging slot without negatively impacting the battery life of listening units. Thus, the reduced-call-setup-time benefit of transmitting a channel assignment message in a paging slot can be realized without trading off battery life.

Computer system and methods for acquiring dump information and system recovery

Abstract: Dump information acquiring and system recovery methods for a computer system using a virtual memory. The computer system has a plurality of external storage units normally used as a paging device unit for holding the contents of the virtual memory to be paged out. When fault occurs, a program for acquiring dump information outputs the contents of the main storage to a dump file. The identifier of the external storage unit set to definition information defining the external storage unit is changed from the identifier of the external storage unit to the identifier of another external storage unit. Thereafter, the computer system is restarted. The contents of the virtual memory held in the paging device unit at the time of fault output to the dump file.

Position management server and mobile communication system

Abstract: A position management server on a radio network using a radio system having no paging function requests a terminal management server on a cellular network using cellular radio to perform paging of a mobile terminal. The terminal management server requests the mobile terminal to perform paging by using the cellular network. The mobile terminal receives the paging request and connects the radio network to the radio channel. The mobile terminal requests the radio network to allocate position information and acquires the position information. The mobile terminal notifies the acquired position information to the position management server on the radio network.

Method for enabling multicast services and user equipment battery savings

Abstract: A system and method for providing multicast services to wireless transmit/receive units (WTRUs) enhances battery life and provides for more efficient use of the radio resources. Each service, or a target group for a service,is assigned an identifier. The identifier is associated with a pointer to the transmission of data. Each WTRU searches for the identifier in order to know when the data will be transmitted. The WTRUs may receive the pointer from a number of different paging windows. The transmission of the data occurs after the last pointer is transmitted in order to guarantee that all the target WTRUs receive a pointer to the data prior to the transmission of the data.