Abstract:
The present invention discloses a method and apparatus for notifying a mobile station application of a specified event in a wireless communication system. The present invention includes an application program interface (API) that facilitates communications between a mobile station communication protocol stack, which communicates with a communication network, and a mobile station application. The mobile station communication protocol stack or the mobile station application interface detects a specified event and invokes notification of the specified event to the mobile station application.
Abstract:
A method and apparatus for digitally demodulating QPSK signals includes a first portion in which the digitally sampled data burst is resampled with a plurality of predetermined timing hypotheses. The timing offset is determined according to an analysis of the resampled data. The digitally sampled data burst is then resampled according to the timing estimation. Modulation of the resampled data burst is then removed by twice squaring the complex I/Q pairs. The data with the modulation removed is then subjected to a Chirp-Z Transform to move the data into the frequency domain. The highest spectral power is used to determine the frequency offset. The phase offset is determined and the resampled data burst is derotated and dephased according to the phase offset and the frequency offset.
Abstract:
A data communication system capable of forwarding IP-addressed data to devices as such devices move among networks having different IP addresses is disclosed herein. The system includes first and second networks containing first and second pluralities of nodes. At least one of the first plurality of nodes is adapted to receive data transmissions from an external IP-based network. Upon joining the first network, this device is assigned an IP address which remains with it irrespective of whether it moves beyond the range of the first network. When this device roams into the vicinity of the second network, data addressed to the device which is received at the first network is forwarded via at least one node of the second network to the roaming device.
Abstract:
A system for crew location and task assignment comprises an enterprise computing system (50), a mobile field unit (52), and wireless communication network (54) which supports transmission control protocol (TCP/IP). The enterprise computing network (50) comprises application programs (80) through which data related to the position of a mobile field unit (52) may be requested, various server machines (84) for storing position data, a local area network (LAN) connecting the server machines (84), and a gateway to the TCP/IP wireless network. A mobile field unit (52) comprises a receiver (97) for receiving position data from a positioning service, a processor (98) having instructions thereon for processing the position data, and a radio modem (86) for communicating the position data over the wireless network (54). The mobile field unit (52) and each machine in the enterprise computing system has a unique IP address assigned to it. Accordingly, commands and data can be communicated freely between all machines.
Abstract:
The invention relates to Internet service in a digital mobile communication network by means of short message service. For this purpose the short message service centre (SC) is connected to the Internet network and uses the HTML, HTTP, and TCP/IP protocols towards the Internet network. Short messages are transferred between the short message service centre (SC) and mobile stations (MS) in the usual manner. The user submits to the service centre a short message containing an identifier indicating the desired WWW page. The short message centre or said other equipment sets up a connection to the desired WWW server via the Internet network, receives therefrom the WWW page, and stores it. The relevant part is separated from the WWW page and is sent to the mobile station in a short message. The relevant part of a WWW page may be identified by a predetermined criterion, common to all subscribers, or it may be based on a criterion received from the mobile station, such as a keyword. The mobile station processes the received short message in the usual manner and displays it to the user.
Abstract:
The present invention provides a method for congestion control at multiple levels in a wireless messaging system. Unlike previous systems that only responded to congestion in one way, the present invention responds to each incoming message packet to a receiving component with a reply that indicates: whether or not the message packet has been accepted (170, 176, 178); the level or function at which the congestion is occurring for rejected message packets (156, 160, 164, 168); and a specific delay time that the sender should wait before sending the next message packet (172). The delay time may be varied in order to control the rate of information flow. In this way, if an area becomes congested and then clears, a "slow start" technique may be used; that is, the rate can be turned back up slowly rather than just "opening the floodgates". Temporary congestion queues in the sender are used to hold message packets addressed to congested areas.
Abstract:
In a wireless telecommunications system, e.g. a DECT/GAP system, control mechanisms (i.e. messages, information elements and procedures) of a standard protocol are activated under the overall control of a first telecommunications device in the system in order to execute a special protocol; the control mechanisms serve for the exchange of additional information between the first telecommunications device and a second telecommunications device in the system.
Abstract:
A technique for enabling connection-oriented multipath transmission is disclosed. A computing unit (110) for executing a multipath application (102) enabling connection-oriented multipath transmission between a client application (106) and a server (108) comprises at least one processor and at least one memory, wherein the at least one memory contains instructions executable by the at least one processor such that the multipath application (102) is operable to receive a packet from the client application (106), the packet being destined for the server (108) and associated with a connection established between the client application (106) and the server (108) using a connection-oriented transport protocol, select an interface from a plurality of interfaces of the computing unit (110) for transmission of the packet to a multipath proxy (104) for delivery to the server (108), and transmit the packet to the multipath proxy (104) via the selected interface.
Abstract:
본 개시는 4G 시스템 이후 보다 높은 데이터 전송률을 지원하기 위한 5G 통신 시스템을 IoT 기술과 융합하는 통신 기법 및 그 시스템에 관한 것이다. 본 개시는 5G 통신 기술 및 IoT 관련 기술을 기반으로 지능형 서비스 (예를 들어, 스마트 홈, 스마트 빌딩, 스마트 시티, 스마트 카 혹은 커넥티드 카, 헬스 케어, 디지털 교육, 소매업, 보안 및 안전 관련 서비스 등)에 적용될 수 있다. 본 발명의 실시예에 따른 무선 통신 시스템에서 송신 장치의 패킷 처리 방법은, QoS 플로우(quality of service flow)와 매핑되는 DRB(data radio bearer)가 제1 DRB에서 제2 DRB로 변경되는지 확인하는 단계와, 상기 DRB가 상기 제1 DRB에서 상기 제2 DRB로 변경되면, 상기 QoS 플로우 중에서 상기 제1 DRB를 통해 전송되는 마지막 패킷에 대한 정보를 수신 장치로 전송하는 단계를 포함한다.