摘要:
Disclosed is a handover method for an IP-based next generation mobile communication system. With a handover method including 1) determining whether or not a predetermined mobile terminal goes into the overlapping area; 2) starting a Layer 3 (L3) handover operation between the neighboring access routers as the mobile terminal goes into the overlapping area; 3) if the Layer 3 handover operation between the neighboring access routers is completed, establishing a data path for the mobile terminal to pass through an access router after the Layer 3 handover; 4) if the mobile terminal leaves a cell area including the mobile terminal in steps 2) and 3), performing by the mobile terminal Layer 2 handover between cells and receiving by the mobile terminal data through a cell base station after the Layer 2 handover and an access router before the Layer 3 handover; and 5) if the mobile terminal leaves a cell area including the mobile terminal after step 3), performing by the mobile terminal Layer 2 handover between cells and receiving by the mobile terminal data through a cell base station after the Layer 2 handover and an access router after the Layer 3 handover.
摘要:
Disclosed is a method of forming access routers into a virtual-IP zone in a Hierarchical Mobile IP (HMIP) system. The method includes reporting a higher-than-threshold state message to a mobility anchor point by each access router if the number of mobile nodes located in its region and the number of mobile nodes being handed over exceed a predetermined threshold; the mobility anchor point sending a virtual-IP zone forming command for grouping access routers into one group to the access routers if a state report message indicating a higher-than-threshold state is received; and the access routers receiving the virtual-IP zone forming command simulcasting an identical virtual-IP zone's network prefix included in the virtual-IP zone forming command, for grouping.
摘要:
A packet scheduling method using a cumulative distribution function. The scheduling method for use in a communication system including a plurality of MSs (Mobile Stations) and a central controller for assigning resources to individual MSs on the basis of a transmission rate associated with downlink channels fed back from the MSs, includes the steps of generating a uniform random variable of transmission rates of individual MSs; converting the uniform random variable into a scheduling priority; comparing the scheduling priority of each MS with each other; and assigning resources to a MS having the highest scheduling priority.
摘要:
In a wireless communication system, a BS transmits first resource allocation information common to all MSs at every predetermined first time point of a first period, and transmits second resource allocation information dedicated to each of the MSs at every predetermined second time point of a second period shorter than the first period, within the first period. An MS receives the first resource allocation information at every first predetermined time point of the first period, and receives second resource allocation information dedicated to the MS at a second time point of the second period predetermined for the MS by analyzing the first resource allocation information.
摘要:
A channel allocation method in a BS that communicates on at least two channels in a wireless communication system is provided. The BS receives information related to the data rates of the available channels from the MSs within its cell area, calculates the variance of the data rates for each channel, arranges the channels according to the variances, and allocates the channels in the arranged order to the MSs to satisfy the required data rates of the traffic for the MSs.
摘要:
An organic electroluminescence (EL) device including an electron transport layer formed between a pair of electrodes, wherein the electron transport layer contains 50˜99.9 wt % of alcohol-soluble polymer and 0.1˜50 wt % of electron transporting material. In the EL device according to the present invention, the electron transport layer can be formed through a spin-coating without damage to the light-emitting layer. Thus, the manufacture process for the organic EL device is simplified, and the time and cost required for the manufacture are reduced.
摘要:
A method for using contents, a method for sharing contents, and a device based on security level are disclosed. A method for using contents based on security level creates a device security level according to the number of device identification elements, receives contents, and if the device security level is found to be a minimum allowed device security level for using the contents, uses the contents. Therefore, a device that does not satisfy the conditions required for using contents cannot use the contents, whereby security is reinforced.
摘要:
A wireless network using network coding, and a method of adaptively adjusting buffering time in the wireless network, are provided. A communication method of a cross node in a wireless network, includes determining information associated with a number of hops between a source node and the cross node, and/or a number of hops between the cross node and a destination node. The method further includes adaptively adjusting a buffering time at the cross node based on the information. The method further includes buffering a packet received by the cross node based on the adjusted buffering time. The method further includes performing network coding of the buffered packet and another packet.
摘要:
A method of managing a domain, a method of extending a domain, and a method of selecting a reference point controller are provided. The method of operating the domain includes: receiving a request for authenticating a reference point controller from a reference point controller candidate; invalidating a membership of the stored reference point controller; generating a unique reference point controller membership for verifying that the reference point controller candidate is a new reference point controller; and transmitting the generated reference point controller membership to the reference point controller candidate. Accordingly, even when an error occurs in the reference point controller, the function of the reference point controller can be rapidly replaced by using the reference point controller candidate.
摘要:
In a method of transferring data in a data interoperable environment, a secure authenticated channel is established with a receiving entity corresponding to receiver information included in a received control message, when the control message is received form a control entity, a plurality of data designated by the control entity are transmitted to the receiving entity through the established secure authenticated channel, and an event message for representing a transmission status of the transmitted data is transmitted to the control entity. Accordingly, it is possible to transmit the plurality of data through a single transmission session and provide a transmission status of each data through an event.