Showing papers on "NodeB published in 2013"

Coordinated multipoint (CoMP) radio resource management (RRM) measurement

Abstract: A method for measurement reporting is described. A measurement configuration is received from an evolved NodeB (eNB). The measurement configuration includes a single measurement object in a carrier frequency. A measurement report for a channel state information reference signal (CSI-RS) is generated based on the measurement configuration. The measurement report is sent to the eNB.

Method and device for performing device-to-device communication in wireless communication system

Abstract: A method for performing device-to-device (D2D) communication in a wireless communication system is provided. A master user equipment sets a D2D link with a slave user equipment. The master user equipment performs D2D communication with the slave user equipment through the D2D link. The master user equipment receives handover information of the slave user equipment from the slave user equipment. The master user equipment transmits the handover information of the slave user equipment to an evolved NodeB of a handover source cell.

Method and apparatus for using a plurality of cells in communication system

Abstract: Methods and apparatus for using a plurality of cells by an evolved NodeB (eNB) in a communication system are provided. A first eNB, which manages a first cell and is providing a communication service to a User Equipment (UE) located in the first cell, determines to provide the communication service to the UE together with a second cell of a second eNB, which neighbors the UE. A cell addition request message, making a request for aggregation of the first cell and the second cell, is transmitted to the second eNB to provide the communication service. When a cell addition response message, accepting the request for aggregation of the first cell and the second cell, is received from the second eNB, a cell activation request message, making a request for activation of the second cell, is transmitted to the second eNB.

Prach signals with different bandwidths

Abstract: The present disclosure concerns radio communication. More particularly, the present disclosure concerns random access procedures used in communication between user equipments (UEs) and radio network nodes, such as evolved NodeB's. According to one exemplary embodiment disclosed herein, a method in a UE 10 comprises transmitting 110, 130 two or more Physical Random Access Channel, PRACH, signals, where the two or more PRACH signals have different frequency bandwidths. Hereby it is made possible to improve the resource utilization during the random access procedure.

Radio resource management method, device and system

Abstract: The disclosure provides a Radio Resource Management (RRM) method, device and system. The method includes that: a first network element judges whether a target Evolved Universal Terrestrial Radio Access Network NodeB (eNB) of a terminal is a configured eNB or not, wherein the configured eNB is an eNB pre-storing context information of the terminal; and under the condition that the target eNB is the configured eNB, the first network element sends a notice of performing communication according to the corresponding context information to the configured eNB and the terminal respectively. By the disclosure, problems of serial Handover (HO) in a related technology are solved, and an effect of increasing an HO success rate is achieved.

Dedicated barring and escape command

Abstract: In accordance with an example embodiment of the present invention, a method includes receiving a connection request in uplink signaling from a user equipment, the user equipment being located in a cell; making a determination whether the user equipment can be connected and, if it is determined that the user equipment cannot be connected, informing the user equipment by downlink signaling, as a response to the connection request, that the user equipment cannot be connected. The downlink signaling includes information that indicates that the user equipment should de-prioritize a current carrier frequency or current radio access technology, and can further include a timer value to indicate a period of time for which the current carrier frequency or current radio access technology is to be de-prioritized. The method can be executed by an evolved NodeB (eNB) of an evolved universal terrestrial radio access network (E-UTRAN).

Communication method, device and system

Abstract: The present invention discloses a communication method, including: sending, by a mobility management entity MME, a bearer setup request message to an evolved NodeB eNodeB, where the bearer setup request message is used to instruct the eNodeB to set up a voice bearer for user equipment; and when the MME receives a bearer setup failure message sent by the eNodeB in response to the bearer setup request message, sending, by the MME, an indication message to the user equipment, where the indication message is used to indicate that a voice over Internet Protocol IP multimedia subsystem IMS VoIMS of the user equipment is unavailable According to the solution provided in an embodiment of the present invention, when setup of a voice bearer of a VoLTE call fails, the user equipment is notified that a VoLTE is unavailable, so that the user equipment can be prevented from continuing attempting to initiate the VoLTE call and exacerbating cell congestion

An Efficient Handover Mechanism by Adopting Direction Prediction and Adaptive Time-to-Trigger in LTE Networks

Abstract: In this paper, we propose an efficient handover mechanism for Long Term Evolution (LTE) networks. Both moving direction prediction and Time-to-Trigger (TTT) adjustment are taken into consideration for processing to lower the unnecessary handover. By referencing previous locations, user equipment’s (UE) moving direction is estimated by the cosine function to determine a better destined E-UTRAN NodeB (eNB). With adaptive TTT, we categorize UEs into 3 levels according to the velocity. Initially, TTT value is given for each level, and the value is decremented when the handover failure rate gets higher. In addition, we also combine both approaches of moving direction prediction and adaptive TTT into handover procedure. Simulation results show that the proposed method can effectively improve the handover efficiency. As compared with the standard handover procedure, an average reduction of 31% handovers can be obtained by applying the moving direction prediction. And, as compared with fixed TTT, up to the 36.5% of handover trigger failure rate can be expected by using the adaptive TTT handover triggering approach. The performance can be further improved when both approaches are taken in dealing with the handover procedure.

Method and Device for Processing and Managing an Establishment of X2 Connection

Abstract: The disclosure discloses a method and a device for processing and managing an establishment of an X2 connection. The method comprises: a home NodeB acquires the address of an adjacent NodeB corresponding to the home NodeB, wherein the address is for establishing an X2 connection between the home NodeB and the adjacent NodeB; and the home NodeB sends the acquired address to an X2 gateway. In the disclosure, the technical problem in the related art that the X2 connection between the home NodeB and the adjacent NodeB cannot be established because the X2 gateway cannot acquire the address of the adjacent NodeB of the home NodeB is solved, thus implementing the establishment of the X2 connection between the home NodeB and the adjacent NodeB.

Method, apparatus, and system for security processing in handover process

Abstract: A method, an apparatus, and a system for security processing in a handover process in the field of communication technologies are provided, including: in a handover preparation and handover execution processes performed by a user equipment UE and a source node and a target node on a network side, obtaining, by the target node, security capability information of the UE provided by the source node or a security verification entity, where the security verification entity includes a gateway in case of UE handover under a NodeB or a donor NodeB in case of UE handover under a relay node; and if the source node provides the security capability information of the UE.

Method and apparatus for base station identification discovery in wireless communications

Abstract: Systems and methods are provided for facilitating base station identity discovery in a wireless communications system. This may be achieved, for example, by exchanging with a User Equipment (UE) a message including a Universal Terrestrial Radio Access Network Radio Network Temporary Identifier (U-RNTI) of the UE, wherein the U-RNTI comprises an indicator representative of a base station identifier of a Home NodeB (HNB) associated with the UE.

Enhanced 3GPP system for interworking with fixed broadband access network

Abstract: This article explains the 3GPP-BBF interworking architecture using WLAN access or home (e)NodeB/femtocell access in order to go toward single network for policy and QoS convergence. The interworking architectures and schemes ensure that the customers get the same service via any access network. In addition, this article covers the mechanisms to support evolved packet core routed traffic and non-seamless WLAN offloaded traffic in the interworking architecture.

An energy aware mobile-controlled handover method for natural disaster situations

Abstract: Existing cellular networks and their services are not equipped enough to deal with such emergency situations that arise following natural disasters like an earthquake or tornado. Often, immediately after a natural disaster, cellular base stations (BS) in the affected areas face power outage problems and their backup power does not last long owing mostly to traffic overloading. This paper proposes a mobile station-controlled reliable target base station selection scheme for energy-aware handover in natural disaster affected areas. In this scheme, an LTE-Advanced (LTE-A) mobile station (user equipment or UE), self-selects the target base station (target evolved nodeB or TeNB) based on two independent parameters, namely, the leftover backup power of the different BSs (Evolved Node B or eNB) in affected areas and the UE's movement direction prediction. The proposed handover scheme offers three significant benefits during natural disasters. Firstly, existing connections continue to receive good QoS. Secondly, new connections are diverted to less-overloaded nearby BSs. Finally, residual battery life of BSs is considerably prolonged.

Channel Quality Information (CQI) reporting

Abstract: Apparatus and method for: controlling 704 the measurement of a radio channel to obtain information on Signal to Interference and Noise Ratio (SINR) of a radio channel; calculating 708 a Channel Quality Index (or Channel Quality Information), CQI, on the basis of the information on Signal to Interference and Noise Ratio (SINR), the selection of the channel quality index table the index points to and the indexing method having been made utilising information on radio channel measurements controlled by the apparatus 706; and controlling 712, 714 the transmission of the channel quality index to the communication system A User Equipment, UE, 116, Figure 1 may perform the SINR measurements and report the associated CQI to a nodeB, 106, Figure 1 The nodeB may indicate 708 to the UE the most appropriate indexing table or indexing method based on an initial radio channel measurement 704, 706, such as a Reference Signal Received Power, RSRP measurement for LTE or Received Signal Code Power on Common Pilot Indicator Channel, CPICH RSCP, or CPICH Ec/N0, Energy per chip to the Spectral Noise Density on Common Pilot Indicator Channel in WCDMA As is typical the reported CQI information may allow the nodeB to determine the most appropriate Modulation and Coding Scheme, MCS, for the current channel conditions A continuous subset of indices pointing a channel quality index table may be used Different channel quality index tables may be used for real or complex valued modulation methods (Figure 6C) Performance differences between different indices of the channel quality index table may be non-uniform

Control channel design for relay node backhaul

Abstract: An evolved nodeB (eNB) operable to function in a wireless telecommunications network. The eNB is operable to support one or more relay nodes, each of the relay nodes comprising a backhaul link to the eNB. The eNB is operable to broadcast control signals dedicated to relay nodes on the backhaul link of the one or more relay nodes. This relay specific control signaling allows a relay node to recover quickly from a disconnection from the radio network due to mobility of the node, synchronization problems, backhaul radio link failure (RLF) and/or to enable Long Discontinuous Reception (DRX) or IDLE operation without having to discontinue its access link operation. The control signals may comprise one or more of relay specific primary broadcast channel (PBCH), primary synchronization channel (PSCH) or secondary synchronization channel (SSCH).

Data transmission method, evolved NodeB and user equipment

Abstract: The embodiments disclose a data transmission method, an evolved NodeB (eNB) and a User Equipment (UE), which can avoid data transmission conflict, and improve data transmission performance and scheduling flexibility. The method according to the embodiments comprises: selecting, by an eNB, a second subframe from a plurality of subframes, when the eNB does not correctly receive a data packet transmitted by a UE in a first subframe; and transmitting, by the eNB, a scheduling signaling to the UE, so that the UE transmits a retransmission packet of the data packet in the second subframe. The embodiments further provide an eNB and a UE. The embodiments of the present invention can effectively avoid data transmission conflict, and improve data transmission performance and scheduling flexibility.

Delay Performance Analysis of LTE in Various Traffic Patterns and Radio Propagation Environments

Abstract: Most real-time multimedia services like VoIP (voice over IP), TV conference and real-time gaming require low end-to-end delay. In the near future, it is expected that more delay sensitive applications such as cloud computing or telepresence will appear. LTE (long term evolution) is able to provide real-time services in mobile environments. LTE is designed to have an end-to-end delay of less than 5ms. The delay performance in LTE may, however, be degraded by the radio propagation environment or traffic pattern. For example, if the quality of radio signal is poor, more retransmission is required between eNB (evolved NodeB) and UE (user equipment) which degrades the delay performance. If packet size is large, the packets may be segmented which also degrades the delay performance. Thus it is very difficult to predict the delay performance of LTE system prior to its installation. This paper analyzes how the delay performance in the layer 2 (L2) process of LTE is affected depending on the traffic pattern and radio propagation environment. We conduct numerical simulations that consider the L2 processes. The numerical simulation correctly estimates the delay pattern even in a realistic fading environment.

Apparatus and method for controlling uplink power control in communication system

Abstract: The present invention provides an apparatus and method for uplink signal power control in a dynamic Time Division Duplexing (TDD) cell. According to the method, after accessing a dynamic TDD cell, a User Equipment (UE) receives from an evolved NodeB (eNB) an uplink power control parameter which has been adjusted for a conflict uplink sub-frame.

Optimizing mobile network bandwidth

Abstract: A gateway turns encrypted PS data traffic on the Iub interface into clear IP packets so that WAN stream de-duplication and other optimization can be performed to eliminate the transfer of repetitive data across the Iub interface, thereby increasing the throughput between the NodeB and the RNC of the WCDMA network. The gateway pulls PS data traffic out from Iub without disturbing the signaling and CS traffic. The bifurcated PS data traffic is redirected to the GTP I/O port of the gateway where the stream de-duplication is applied. Deployment of the gateway is transparent to the WCDMA network. No network reconfiguration is required to deploy the gateway on the Iub interface.

Service control method and system, evolved nodeb and packet data network gateway

Abstract: Embodiments of the present invention disclose a service control method and system, an evolved NodeB, and a packet data network gateway, to perform resource scheduling on a packet. The method provided in an embodiment of the present invention includes: receiving, by an evolved NodeB, a packet; determining, by the evolved NodeB, a service control policy corresponding to the packet according to correspondence between a service application type and a service control policy and a service application type corresponding to the packet; and performing, by the evolved NodeB, resource scheduling on the packet according to the service control policy corresponding to the packet. Embodiments of the present invention further include a service control system, an evolved NodeB, and a packet data network gateway.

Time-domain-cascade-correlation Timing Advance estimation method in LTE-A super coverage

Abstract: Aiming at the uplink out-of-synchronization resulted from the long distance between the UE (User Equipment) and eNodeB (evolved NodeB) in LTE-A (Long Term Evolution-Advanced) super coverage, a time-domain-cascade-correlation method for estimating TA (Timing Advance) is proposed in this paper. Based on the design of the random access preamble structure, the eNodeB achieves the estimation of TA by cascading two different ZC (Zadoff-Chu) sequences to form the preamble sequence and detecting the delay of channel with the sliding correlation in the time domain. The theoretical analysis and simulation results show that the coverage performance of the Physical Random Access Channel (PRACH) can meet the requirements in LTE-A super coverage with the proposed method.

Key separation method and device

Abstract: A key separation method and device are provided in the embodiments of the present invention. The key separation method includes: when a User Equipment hands over from a source node to a target node, or when the User Equipment moves from the source node to the target node in idle state, determining whether or not the source node is a Home NodeB; and if the source node is a Home NodeB, triggering an Authentication and Key Agreement procedure according to the operator's policy, to update Ciphering Key and Integrity Key. By performing Authentication and Key Agreement procedure, the method and device of the embodiments separate key of the source node from the key of the target node.

Paging method and paging device on basis of Home NodeB system framework

Abstract: The invention discloses a paging method and a paging device on the basis of a Home NodeB system framework. The paging method includes determining that a corresponding relation of terminal identification and terminal location state information contains the terminal identification of a terminal to be paged, then determining the terminal location state information corresponding to the terminal identification of the terminal to be paged according to the corresponding relation of the terminal identification and the terminal location state information; selecting equipment identification information from Home NodeB equipment identification information contained in the terminal location state information; transmitting paging information to page the terminal to a Home NodeB corresponding to the selected equipment identification information. According to the technical scheme, the paging method and the paging device have the advantages that paging processing resources can be effectively saved, load on a Home NodeB gateway can be reduced, and the processing capacity of the Home NodeB gateway can be improved.

Method and device for network management

Abstract: The invention provides a method and device for network management. The method comprises the following steps of: adding a new group to a 3GPP (Third Generation Partnership Project) standard model; and adding a new-attribute self group and a related group to the logic function of a NodeB, and establishing the corresponding relation between the groups and the NodeB. The method and the device are used for solving the problem of difficulty in network management and have the beneficial effect that the network management is easier.

Adaptive time division duplexing configuration mode selection mechanism for accommodating asymmetric traffic in time division long term evolution‐advanced systems

Abstract: Recently, mobile networks have been suffering from asymmetric traffic congestion as various multimedia services have been newly introduced To solve the congestion, mobile networks should be able to adaptively adjust resource volume for uplink and downlink transmissions However, for a 3rd Generation Partnership Project time-division long term evolution advanced system, research has not been carried out on the details of the dynamic resource adjustment In this paper, we propose a mechanism in which evolved NodeB can adaptively adjust resource volume for uplink and downlink transmissions by switching the time division duplexing configuration mode Simulation results show that the proposed mechanism can effectively accommodate uplink and downlink traffic, and can maintain queueing delays of mobile traffic at low levels in both uplink and downlink channels Copyright © 2013 John Wiley & Sons, Ltd

System-level simulation platform with interference avoidance for Device-to-Device communication underlaying cellular system

Abstract: Device-to-Device (D2D) communication is the technology enabling user equipment (UE) to directly communicate with each other without help of evolved nodeB (eNB) which caters to the demand for high spectrum efficiency. This work focuses on the hybrid network which contains multiple Cellular UEs and D2D UEs. D2D communication shares up-link resource with cellular system and improves the performance of the entire network. However, by introducing D2D communication into cellular systems, the mutual interference between D2D links and cellular links may be severe. We accordingly develop a system-level simulation platform based on interference avoidance scheme. It provides a tool to observe the interference and analyse the performance of hybrid network. The simulation results prove that the coexistence of the cellular and D2D links will bring obvious contribution to the sum capacity of hybrid network.

Mitigating Uplink interference in femtocell networks with Physical Layer Network coding

Abstract: The challenge of mitigating the Uplink (UL) interference in a two-tier heterogeneous network could be significantly improved by employing Physical-Layer Network coding (PNC) at a Home NodeB (HNB). This paper makes a case for a macrocell femtocell overlay network that utilizes PNC to mitigate the UL interference at the HNB. In closed subscriber group (CSG) UL information exchange, a Macrocell User Equipment (MUE), especially situated at coverage area's edge of a macrocell nodeB (MNB), creates interference that could make the received signal-to-interference-plus-noise-ratios (SINR) of the neighboring HNB to fall below the acceptable threshold. In a bid to ensure that the Service Quality (QoS) of femtocell and macrocell users are guaranteed, we propose to use PNC at the HNB by taking advantage of both the signals from the MUE and the Home User Equipment (HUE), rather than considering the signal from the MUE as interference. The paper develops the analytical expression of outage probability in closed-form, or equivalently the cummulative distribution function (CDF) for the received SINR of the proposed system is provided. Our results show that PNC is suitable for interference mitigation in femtocell network and it provides significant gain over the traditional scheme.