摘要:
In a multiprocessor system having a main memory and a plurality of processors connected through common address bus, data bus and answer bus for data transfer, a data transmission apparatus is provided for each of the main memory and the processors and includes bus request control lines for transferring bus request signals and bus control signals, and a bus controller for separately controlling selections of the address bus, the data bus and the answer bus in response to the signals on the bus request control lines and the request signal. Overlapped processing such as data write and data write answer or data read and data read answer in one cycle is possible.
摘要:
A virtual storage data processing system having an address translation unit shared by a plurality of processors, located in a memory control unit connected to a main memory is disclosed. One of the plurality of processors is a job processor which accesses the main memory with a virtual address to execute an instruction and includes a cache memory which is accessed with a virtual address. One of the plurality of processors is a file processor which accesses the main memory with a virtual address to transfer data between the main memory and an external memory. The cache memory receives the virtual address when the file processor writes to the main memory and if it contains a data block corresponding to the virtual address, it invalidates the corresponding data block. The address translation unit translates the address differently for the access from the file processor and the accesses from other processors.
摘要:
A central processing unit for executing instructions of variable length in which an operand specifier for specifying the addressing mode of an operand is independent of an operation code for ascertaining the kind of an operation and the number of operands. Each operand specifier is formed of one or more data bytes, and has a stop bit flag indicating whether or not the particular operand specifier is the last operand specifier. By adding the stop bit flag, the operand specifier can be shared, and different processing can be executed with an identical operation code. In a case where, when operation code decoding means has provided an output indicative of the last operand, the stop bit flat is not detected in the corresponding operand specifier, the corresponding instruction is detected as an error.
摘要:
A data processing system for supporting a virtual memory is disclosed. Prior to the start of main memory write operation, a processor checks to see if a store buffer has a vacant area to store data to be written into a main memory to execute a current instruction. If a page fault occurs during the main memory write operation, the processor continues to store the subsequent write data for the current instruction and the corresponding virtual or logical addresses in the store buffer to complete execution of the current instruction.
摘要:
A technique is disclosed, by which it is possible to achieve the reduction of power consumption of each wireless node and to perform efficient access control in wireless communication system. According to this technique, a given period with a beacon transmitted from a gateway (GW) 100 at the foremost position is divided to an active period where each wireless node (P2P tag) transmits and receives a frame and a sleep period where transmitting and receiving of the frames are stopped. Further, the active period is divided to a plurality of timeslots each with a fixed length, and the period is partitioned to sub-periods where each type of a GW, a fixed node (P2P-S tag), and a mobile node (P2P-M tag) can transmit frames respectively. Each of the P2P tags selects a timeslot at random from the period for each type, and after waiting for a waiting period at random at the selected timeslot, it transmits a frame including information to identify the selected timeslot or the waiting period in addition to its own ID.
摘要:
The present invention provides a radio node apparatus, a multi-hop radio system and a multi-hop radio system constructing method, capable of constructing a tree type multi-hop radio system in which mutual radio nodes determine a radio node which becomes a root node of a tree in an autonomous manner and the root node is set as a root in an autonomous manner. The radio node apparatus includes a storage unit for storing state information, used for constructing a multi-hop radio system, including information for specifying a root radio node apparatus positioned at a summit of the multi-hop radio system, with the radio node apparatus has a connection, and the number of hops from the root ratio node apparatus, a collection unit for collecting state information transmitted from surrounding radio node apparatus, and a selection unit for selecting a host connection-accepting radio node apparatus on the basis of the information for specifying the root radio node apparatus and the number of hops included in the collected state information.
摘要:
Disclosed is a technique which reduces the packet loss and the band consumption for data transfer when a mobile terminal conducts the handover between a fixed base station and a mobile base station for group movement. According to this technique, when an MH (mobile terminal) 320 conducts the handover from a fixed base station (E-LSR 230) positioned at an edge of an access network 200 to a mobile base station (MEB 310) located in a train or the like, a predetermined flag is appended to a frame addressed to the MH in a label switching router (P-LSR 210) positioned at a core network 100 side edge of the access network. The frame having the appended flag is copied in the E-LSR 230. One frame after copied is transmitted directly from the E-LSR to the MH while the other frame after copied is transferred from the E-LSR to the MEB and then transmitted from the MEB to the MH, thus realizing the soft handover.
摘要:
There is disclosed an access network system capable of improving throughput even when a single relay device is arranged for different communication routes between an ISP device and a plurality of subscriber terminal devices. In this system, each of the subscribers (111 to 114) and relay stations (105) sets a VLAN so that one VLAN becomes a line. By VLAN-tagging to the packet of the subscriber data, the subscriber data is transferred via the VLAN. The access network system (100) generates MAC address tag information having a destination MAC address indicating the subscriber station which is an edge of the route of the VLAN, a source MAC address indicating the subscriber station corresponding to the route of the VLAN, and a VLAN tag and adds the MAC address tag information to the subscriber data.
摘要:
Disclosed is a technique of transferring packets among wireless nodes as done in a tree type LAN, without intervening a root node to achieve efficient communications among the wireless nodes. According to the technique, a multihop wireless LAN is constructed by wireless nodes in such a way that it is determined whether or not a wireless node is a root node upon activation; when it is determined that the wireless node is the root node, status information is notified to wireless nodes to be connected, when it is determined that the wireless node is not the root node, wireless nodes to be connection candidates are requested to acquire status information, a higher-rank base station wireless node to be connected is selected and connected based on the status information, and when the wireless node apparatus is made a connection candidate later, status information is notified to wireless nodes. The wireless node includes bridge transfer means 101 which transfers packets from wireless nodes connected as higher-rank base stations to the higher-rank base station wireless node or the wireless node apparatuses connected as higher-rank base stations, or transfers a packet from the higher-rank base station wireless node to the wireless nodes connected as higher-rank base stations.
摘要:
The present invention relates to an electrophotographic photosensitive member 2 including a conductive body 20, a photoconductive layer 22 formed on the conductive body 20 using amorphous silicon, and a surface layer 23 formed on the photoconductive layer using amorphous silicon. The present invention further relates to an image forming apparatus provided with the electrophotographic photosensitive member 2. The photoconductive layer 22 has a mean roughness Ra of not more than 10 nm per 10 μm square. The surface layer 23, without undergoing grinding process, has a mean roughness Ra of not more than 10 nm per 10 μm square.
摘要翻译:本发明涉及一种电子照相感光构件2,其包括导电体20,使用非晶硅形成在导电体20上的光电导层22以及使用非晶硅形成在光电导层上的表面层23。 本发明还涉及一种设置有电子照相感光构件2的图像形成装置。光电导层22的平均粗糙度Ra每10平方米不超过10nm。 表面层23,不进行研磨处理,其平均粗糙度Ra为10m / m 2的平方。