Samsung Electronics Co., Ltd.

S-printing Solution Co., Ltd.

Seong-ho Jeong

Jong-Ho Bang

Jong-won Han

Sung-Hyuck Lee

Byeong-no Jeong

Sang-jin Park

Sung-hyuck Lee

Sang-hoon Lee

Ji-won Moon

Ji-Hoon Lee

Seung-chan Park

Dong-cheol Ahn

Se-jong Oh

Hyung-seok Chang

An electrophotographic image forming apparatus may include an imaging cartridge and a toner cartridge that are detachably attached to a main body, a first optical sensor that is mounted in the imaging cartridge and detects a toner level in a development chamber, and a second optical sensor that is mounted in the toner cartridge and detects a toner level in the development chamber.

Electrophotographic image forming apparatus, toner cartridge for the same, imaging cartridge for the same, and method of controlling toner level in developing chamber of the same

An imaging cartridge includes a photoconductive unit including a photoconductor on which an elastic latent image is formed; a development unit including a development roller that supplies toner to the photoconductor to develop the toner and a gap maintaining member that constrains an approach distance of the development roller with respect to the photoconductor; a first position determining portion provided in the development unit; a lateral bracket that is fixed to a side portion of the photoconductive unit and has a second position determining portion that guides the first position determining portion so as to movably support the development unit; and an elastic member that applies to the development unit an elastic force in a direction in which the development roller approaches the photoconductive unit.

Imaging cartridge and electrophotographic image forming apparatus using the same

An electrophotographic image forming apparatus includes an imaging cartridge and a toner cartridge that are detachably attached to a main body, a first optical sensor that is mounted in the imaging cartridge and detects a toner level in a development chamber, and a second optical sensor that is mounted in the toner cartridge and detects a toner level in the development chamber.

An electrophotographic image forming apparatus and a development cartridge are provided. The electrophotographic image forming apparatus includes a body including an opening, a photoreceptor cartridge attached to, or detached from, the body through the opening, a photoconductive drum and a mounting portion, a development cartridge attached to, or detached from, the mounting portion through the opening while the photoreceptor cartridge is mounted in the body, a development roller supplying toner to an electrostatic latent image formed on the photoconductive drum, a cover for opening or closing the opening, and a pressurizing unit fixing the development cartridge to the mounting portion by providing a pressing force to the development cartridge in a direction parallel to a center line connecting centers of the photoconductive drum and development roller while the opening is closed.

Electrophotographic image forming apparatus and development cartridge

A method, medium, and system for reserving resources in a mobile network. A mobile node reports a start of a handover to a present access router if the handover of the mobile node occurs, and the previous access router transmits specified session information to a candidate access router that has a possibility handling the mobile node's handover. A candidate crossover router, which performs a resource reservation work on a new path and a resource release on the previous path, is searched, and a localized resource reservation is established by exchanging a specified resource reservation message before the handover is completed if the candidate crossover router is determined. Accordingly, duplication of resources can be prevented, and a prompt resource reservation can be achieved during the handover.

Method, medium, and system for searching crossover router and method, medium, and system for reserving resources in mobile network

A resource reservation system and method in a multihoming environment are disclosed. The method includes: transmitting query messages from the mobile node to multiple adjacent access routers using a plurality of care of addresses (CoAs) stored in the mobile node; transmitting the query messages from the adjacent access routers to a crossover node; at one or more intermediate nodes on a communication path between the adjacent access routers and the crossover node, recording available resource information in the query messages; receiving the query messages at a predetermined correspondent node; analyzing, at the correspondent node, the recorded available resource information in the received query messages and selecting a communication path which transferred a query message containing available resource information indicating the available resources required by the mobile node; and transmitting a resource reservation message from the correspondent node to the mobile node through the selected communication path.

Resource reservation method using multiple interfaces in mobile environments

An end-to-end quality-of-service (QoS) interoperation apparatus and method in a heterogeneous network environment are provided. A Next Steps In Signaling (NSIS) Application Programming Interface (NAPI) block handles an NSIS API at the request of an upper layer. An NSIS entity handles an NSIS protocol stack at the request of the NAPI block. An Internet Protocol Bearer Service (IP BS) manager manages an IP BS. A translation block translates parameters of a 3GPP_CLASS object and a UMTS QoS class predefined in an NSIS message according to a predetermined mapping configuration. A memory stores a software application including a Universal Mobile Telecommunication System Bearer Service (UMTS BS) manager for managing a UMTS BS. A processor combined with the memory, controls the software application.

End-to-end QoS interoperation apparatus and method in heterogeneous network environment

A method of signaling quality of service information in response to a handover from a first access network to a second access network in an Internet Protocol (IP) based mobile network environment, the method comprising: transmitting a resource reservation message from a mobile node to the second access network; transmitting the resource reservation message to an IP-based core network from the second access network; and transmitting a resource reservation confirm message to the mobile node.

Method of signaling QoS information at hand-over between access networks in an IP-based core network

A queue management method of an access network device includes receiving a packet, determining feasibility of a packet transmission within a delivery deadline allowed from a destination if the received packet is for real-time transmission, storing the packet in the transmission queue and transmitting the packet in sequential order of the storage when the packet transmission within the delivery deadline is feasible, and dropping the packet instead of storing the packet in the transmission queue when the packet transmission is determined infeasible. Accordingly, resources required for the packet transmission are saved.

Growing community of inventors

Seongnam-si, South Korea

Seong-ho Jeong