Showing papers on "NodeB published in 2005"

Network element time synchronizing method in mobile communication system

Abstract: Applied to WCDMA or TD- SCDMA mobile communication system, the method includes time lock between operation maintenance center (OMC) and radio network controller (RNC) as well as time lock between RNC and base station (NodeB). When time of OMC is as reference time, hierarchical managing scheme for time lock is as following: through SNTP protocol, letting reference time of RNC be reference time of OMC; and using synchronization result of nodes between RNC of UTRAN in UMTS and NodeB, letting reference time of NodeB be reference time of RNC. When time of NodeB is as reference time, hierarchical managing scheme for time lock is as following: using SYNC result of nodes between RNC of UTRAN in UMTS and NodeB, letting reference time of RNC be reference time of NodeB; and through SNTP protocol, letting reference time of OMC be reference time of RNC. Taking full advantage of synchronization result of nodes, the invention realizes high precision in SYNC and less overhead of net element.

Method for controlling EDCH uplink scheduling request signaling

Abstract: A means for controlling EUDCH user sending upgoing request signal, including steps: Node B calculates general speed control parameter of the upgoing signal of the EUDCH user in next cycle; NodeB broadcasts the parameter to users; EUDCH user designs whether its TTI sends upgoing request signal according to the general speed control parameter before he sends upgoing signal to change the TFC subset which is controlled by the NodeB, if it can sends, TTI sends the upgoing signal, if it can not, TTI does not send the upgoing signal. The invention can equipped user signal general speed control parameter according to the current surveying RoT and EUDCH user and control the probability that EUDCH user sends upgoing-dispatching signal flexibly.

Apparatus and method for testing operating and maintaining functions of Iub interface of base station in communication system

Abstract: The invention discloses a means and apparatus for testing the function of the NodeB Iub interface O&M of the communication system, the means and apparatus builds an IP route channel which is linked between NodeB and administration station and is for testing function of NodeB Iub interface special O&M in the current logic O&M testing apparatus, and it adds a self-defining interface for administration station, promotes special O&M testing by using the administration station. The invention omits the development of testing software for simulation administration station testing the function of the NodeB special O&M. so it reduces testing cost and the dependency of the apparatus manufacturer to the original testing apparatus.

Cell timing distribution mechanism

Abstract: A method and system of cell timing distribution which greatly reduces the bus bandwidth required for transmission of cell timing information in a WCDMA base station. The system of the present invention comprises a timing control unit connected to several communication cells through transmission lines. Each communication cell comprises a timing generator which determines a local timing (sfn) according to a frame boundary signal and a timing difference (t_cell) parameter received from the timing control unit. The frame boundary signal indicates the starting boundary of the central base station (nodeB) timing, whereas the t_cell parameter represents the offset between the local cell timing and the nodeB timing. The timing generator is implemented using a finite state machine and a counter.

A hybrid model of the UMTS downlink capacity with WWW traffic on dedicated channels

Abstract: One of the main advances of 3G networks like UMTS is the ability to support a large variety of different services. These services are subdivided in two domains, circuit-switched services and packet-switched services. The main application expected for packet-switched services is the browsing of the World Wide Web. The web traffic is usually described by quite sophisticated source traffic models and the packet arrivals on IP layer are determined by TCP. On the other hand, the planning process for UMTS networks relies on analytic methods or Monte Carlo simulations that assume the number of users to be Poisson distributed. The intention of this work is to examine if it is possible to apply the existing planning methods to web traffic. We are able to show that the Poisson assumption holds for the number of web users that simultaneously transmit over the air interface and that the resulting NodeB transmit power distribution is valid. We use the Monte Carlo simulation technique to evaluate the web capacity of an example UMTS network.

Space-time transmit diversity field trial using commercial WCDMA equipments

Abstract: Space-time transmit diversity (STTD) is an open-loop transmit diversity technique mandatory for WCDMA user equipment (UE) compliant with the Release 99 of 3GPP technical specifications In this paper the performances of STTD are estimated through the use of link level simulations, lab tests and more importantly with an extensive field trial in which commercial WCDMA network equipments and handsets were used The lab and field tests took place in Huawei's research lab and trial network in Shanghai, China The outcomes of the lab and field tests, which were fully in line with the simulation results, showed that STTD is able to offer a reduction in the nodeB transmitted code power from 10 dB to 30 dB, depending on the multipath radio channel characteristics and UE speed The measured gains per link, translated in capacity figures, result in 40% air-interface capacity increase for a typical urban propagation environment Therefore the results of this trial confirm that STTD is an effective feature to increase the coverage and capacity of WCDMA systems

Method and apparatus for indicating upstream schedule information whether sending or not in wide-band CDMA

Abstract: The method includes steps: in physical layer, UE transmits USII; based on USII, NodeB determines whether corresponding dispatching information is transmitted or not. Comparing with existed mechanism of making NodeB know whether UE has transmitted up going dispatching information, the invention i.e. USII is transmitted at physical layer possesses advantages as following: raising reliability of receiving up going dispatching information, reducing signaling overhead of up going dispatching information. Thus, flexibility of designing code of up going dispatching information is raised.

A method for on-site test of demodulation performance of WCDMA mobile communication system

Abstract: The invention discloses a method of testing the demodulating property of a wide-band code division multiple access (WCDMA) mobile communication system on the spot, including: setting a test line; establishing tested services, and recording the SIR information of received signal that the UE end and base station (NodeB) end include after moving the UE along the test line, and according to the recorded SIRs, calculating the Eb/No ratios of transmitting end of the system at a certain BLER under ascending and descending situations, respectively, where Eb stands for average consumed energy per bit and NO stands for average interference. It realizes the accurate testing for the demodulating property of WCDMA system and need not adopt high spectrum analyzer.

A method of common measure in the wireless resource management

Abstract: The invention discloses a method of common measure in the wireless resource management, combining one more measure types of the corresponding period measure for the same measure object into a new measure type example, and recording the relation between the uncombined measure type example and new measure type example, every time base controller startup the new measure type example, NodeB report the measure report according to the new measure type, the method reduces the measure example numbers between the base controller and station NodeB and the traffic of the measure report, not only meets the measure requirement of the every arithmetic, but also economizes the transmission bandwidth between the base controller and station NodeB, depresses the source waste caused by measure, improves the system performance

Method for operating a transmitting station in a communication system as well as transmitting station

Abstract: Method for operating a transmitting station (NodeB) in a communication system in which the transmitting station (NodeB) of a group consisting of N elements, data vector (u) by encoding with a Fehlerschutzkode a transmit vector

A method for controlling data transmissions from a transmitting device to a receiving device of a radio access network of a radio communication system and the first and second means

Abstract: Disclosed is a method for controlling data transmissions from a transmitting device (NodeB) to a receiving device (RNC) of a radio access network of a radio communication system. According to said method, data (D1, D2, D3) is transmitted from the transmitting device (NodeB) to the receiving device (RNC) via transmission channels (TK1, TK2, TK3) via a transmission resource (UR) that is jointly utilized by all transmission channels (TK1, TK2, TK3), the transmitting device (NodeB) is notified of an occurrence or an imminent occurrence of a data congestion (DS) in the receiving device, and the transmitting device (NodeB) tales measures to prevent or end the data congestion. The transmitting device (NodeB) assigns at least one of the transmission channels (TK3) to a first of two groups of transmission channels based on a distinguishing characteristic for the transmission channels (TK1, TK2, TK3) and applies the measures exclusively to data (D3) of transmission channels (TK3) of the first group.