Week 6
... to the physical layer by adding mechanism to detect and retransmit damage or lost frames and prevent duplication of frames. • Access control: When two or more devices are connected to the same link, data link layer protocols are necessary to determine which device has control over the link at any gi ...
... to the physical layer by adding mechanism to detect and retransmit damage or lost frames and prevent duplication of frames. • Access control: When two or more devices are connected to the same link, data link layer protocols are necessary to determine which device has control over the link at any gi ...
Chapter5
... Two types of “links”: point-to-point PPP for dial-up access point-to-point link between Ethernet switch and host broadcast (shared wire or medium) traditional Ethernet upstream HFC 802.11 wireless LAN ...
... Two types of “links”: point-to-point PPP for dial-up access point-to-point link between Ethernet switch and host broadcast (shared wire or medium) traditional Ethernet upstream HFC 802.11 wireless LAN ...
PPT Slides - Iust personal webpages
... The centralized approach is efficient and accurate to identify the network faults in certain ways Resource-constrained sensor networks can not always afford to periodically collect all the sensor measurements and states in a centralized manner Central node easily becomes a single point of data traff ...
... The centralized approach is efficient and accurate to identify the network faults in certain ways Resource-constrained sensor networks can not always afford to periodically collect all the sensor measurements and states in a centralized manner Central node easily becomes a single point of data traff ...
On the use of electromagnetic waves as means of power supply in
... energy-harvesting system. An incident power of the electromagnetic waves is absorbed by the effective area of the antenna and passes through a transmission line to reach a voltage multiplier. Then the peak output voltage is increased four times the peak input voltage. The output of this stage corres ...
... energy-harvesting system. An incident power of the electromagnetic waves is absorbed by the effective area of the antenna and passes through a transmission line to reach a voltage multiplier. Then the peak output voltage is increased four times the peak input voltage. The output of this stage corres ...
IOSR Journal of Electronics & Communication Engineering (IOSR-JECE)
... Comparison Of Different Topology Of Wireless Mesh Access Network Using Cross Layer Solution For Performance Improvement To address the Unidirectional Link Problem a reverse path should be established between the mesh routers and mesh clients. A multihop routing reserve path need to be established, ...
... Comparison Of Different Topology Of Wireless Mesh Access Network Using Cross Layer Solution For Performance Improvement To address the Unidirectional Link Problem a reverse path should be established between the mesh routers and mesh clients. A multihop routing reserve path need to be established, ...
Communication - Computer Information Systems
... Therefore, he suggests, that everyone does it in his own preferred way. We agree that the difference between sending eggs with the little- or the big-end first is trivial, but we insist that everyone must do it in the same way, to avoid anarchy. Since the difference is trivial we may choose either w ...
... Therefore, he suggests, that everyone does it in his own preferred way. We agree that the difference between sending eggs with the little- or the big-end first is trivial, but we insist that everyone must do it in the same way, to avoid anarchy. Since the difference is trivial we may choose either w ...
Overview of Sensor Networks
... range of applications presents a systems challenge. The network must allocate limited hardware to multiple concurrent activities, such as sampling sensors, processing, and streaming data. The potential interconnections between devices must be discovered and information routed effectively from where ...
... range of applications presents a systems challenge. The network must allocate limited hardware to multiple concurrent activities, such as sampling sensors, processing, and streaming data. The potential interconnections between devices must be discovered and information routed effectively from where ...
t 2
... Include a length field in the frame header(e.g. DECNET) length field(overhead) must have at least log2Kmax +1 bits where Kmax is maximum frame size Compared to 2.37similar overhead ...
... Include a length field in the frame header(e.g. DECNET) length field(overhead) must have at least log2Kmax +1 bits where Kmax is maximum frame size Compared to 2.37similar overhead ...
Multiple Access Links and Protocols
... Sending adapter encapsulates an IP datagram (or other network layer protocol packet) in Ethernet Frame which contains a Preamble, a Header, Data, and CRC fields Preamble: 7 bytes with the pattern 10101010 followed by one byte with the pattern 10101011; used for synchronizing receiver to sender c ...
... Sending adapter encapsulates an IP datagram (or other network layer protocol packet) in Ethernet Frame which contains a Preamble, a Header, Data, and CRC fields Preamble: 7 bytes with the pattern 10101010 followed by one byte with the pattern 10101011; used for synchronizing receiver to sender c ...
Integration of Smart Antenna System in Mobile Ad Hoc Networks
... Conventionally, MANETs have been known to use omnidirectional antennas for transmission as well as reception. The use of omnidirectional antennas may result in lower power efficiency due to interference caused by the transmission of packets in undesired directions. Use of SAS in MANETs is envisioned ...
... Conventionally, MANETs have been known to use omnidirectional antennas for transmission as well as reception. The use of omnidirectional antennas may result in lower power efficiency due to interference caused by the transmission of packets in undesired directions. Use of SAS in MANETs is envisioned ...
Chapter 4. - Amoud University
... most important protocol in this layer. It is a connectionless protocol that does not assume reliability from lower layers. IP does not provide reliability, flow control, or error recovery. These functions must be provided at a higher level. IP provides a routing function that attempts to deliver tra ...
... most important protocol in this layer. It is a connectionless protocol that does not assume reliability from lower layers. IP does not provide reliability, flow control, or error recovery. These functions must be provided at a higher level. IP provides a routing function that attempts to deliver tra ...
Topologies and Access Methods
... • Each wireless technology is defined by a standard that describes unique functions at both the Physical and the Data Link layers of the OSI ...
... • Each wireless technology is defined by a standard that describes unique functions at both the Physical and the Data Link layers of the OSI ...
Slides
... • Scales to ~1000 or so devices – Uses IS-IS already proven well beyond 1000. – Huge improvement over the STP scales. ...
... • Scales to ~1000 or so devices – Uses IS-IS already proven well beyond 1000. – Huge improvement over the STP scales. ...
TCP
... physical link, including error detection. Physical: provides electrical and mechanical control to transmit data bits onto communication medium. ...
... physical link, including error detection. Physical: provides electrical and mechanical control to transmit data bits onto communication medium. ...
ECE544 - WINLAB
... HLen: the length of header in 32-bit word Length: the length of the datagram, including header in bytes TOS: or Differentiated Services (DS) field, 2-bit Explicit Congestion Notification (ECN) + 6-bit Differentiated Services Code Point (DSCP) Ident: identifier set by source, unique over some reasona ...
... HLen: the length of header in 32-bit word Length: the length of the datagram, including header in bytes TOS: or Differentiated Services (DS) field, 2-bit Explicit Congestion Notification (ECN) + 6-bit Differentiated Services Code Point (DSCP) Ident: identifier set by source, unique over some reasona ...
Wireless Sensor Networks Using A Delay-Aware
... 2) Each SCH performs random back off and then broadcasts a density probing packet (DPP) to its neighboring SCHs which are within a distance of m. 3) Each SCH will do a random back off and then broadcast an invitation packet (IVP) to its neighbors within m. The IVP contains the level and the identity ...
... 2) Each SCH performs random back off and then broadcasts a density probing packet (DPP) to its neighboring SCHs which are within a distance of m. 3) Each SCH will do a random back off and then broadcast an invitation packet (IVP) to its neighbors within m. The IVP contains the level and the identity ...