Báo cáo hóa học: " TCP-M: Multiflow Transmission Control Protocol for Ad Hoc Networks" doc

... indicated that transmission control protocol (TCP) in its base form does not perform well in an ad hoc environment. The main reason identified for this behavior involves the ad hoc network dynamics. ... the ad hoc transport Protocol (ATP) for mobile ad hoc networks [6]. After study- ing issues with the TCP in ad hoc networks, the authors have taken a new approac...

Ngày tải lên: 22/06/2014, 22:20

... enabled fully controllable topology formation. The subnodes forwarded their traffic through the headnode. Table 5: Measured duty cycle of MCU and radio. Node Interval MCU Radio TX Radio RX Subnode ... of data transmission in each active period. For comparability, n F is assumed to be equal for all synchronized protocols. Thus, the optimal access cycle length (T ∗ AC ) for synchronized p...

Ngày tải lên: 21/06/2014, 11:20

... control conditions (C2),(C1)’,and(C5)’ hold for {l n } and {a n }, (C1)’: 0 <λ n ≤ η k 2 − ε , ∀n ≥ n 0 for some integer n 0 ≥ 0, and (C5) ‘:0<g ≤ lim inf n®∞ a n lim sup n®∞ a n < 1for ... {y n }and{F( x n )}. Therefore, w e have l n F(x n ) ® 0. From α n ∈  γ , 1 2  for some g >0,wehave0<g ≤ lim inf n®∞ a n ≤ lim sup n®∞ a n < 1forsomeg Î (0, 1). Therefore, all...

Ngày tải lên: 21/06/2014, 02:20

... avoidance and control protocols, rate adjustment mechanisms, fairness schemes, and transport protocols for wireless sensor networks are reviewed. In [8, 9], the major issues of transport layer protocols ... event region information, per-node event information, or multiple events information, and so forth. Consider a WSN working inside a mine for the purpose of environmental monitoring a...

Ngày tải lên: 21/06/2014, 23:20

... MAC protocol design for MIMO ad hoc networks,” IEEE Wireless Communications, vol. 13, no. 4, pp. 62–76, 2006. [4] D. P. Palomar, J. M. Cioffi, and M. A. Lagunas, “Joint Tx-Rx beamforming design for ... wireless ad hoc networks,” IEEE Wireless Communications, vol. 13, no. 4, pp. 77–83, 2006. [11] R. A. Iltis, S J. Kim, and D. A. Hoang, “Noncooperative iter- ative MMSE beamforming a...

Ngày tải lên: 21/06/2014, 23:20

... type Source address Off-Phase duration On-Phase duration super-time-slot duration for node i super-time-slot starts defer time Source address for ith super-time-slot Destination address for ith super-time-slot Figure ... super-time-slot Figure 11: Schedule message packet format for ASMAC. We add ACK message as the acknowledgment for receiving data packets successfully. A transmissio...

Ngày tải lên: 22/06/2014, 22:20

... operate conflicting readers at different times. By conflicting readers we refer to the set of readers that are affected by either the reader- reader or reader-tag collision problems. For the small-to moderate-sized ... Thus, a reader generally needs to query for multiple rounds before all tags are read. To prevent successfully read tags from replying again in the same read cycle, they are ack...

Ngày tải lên: 21/06/2014, 11:20

... Revised 15 April 2005 Wireless ad hoc sensor networks differ from wireless ad hoc networks from the following perspectives: low energ y, lightweight routing protocols, and adaptive communication patterns. ... the aggregate control packets generated for each node by both protocols. EARP generated 3.49% less control packets than AODV. The 3.49% may look like a small figure, but the...

Ngày tải lên: 23/06/2014, 00:20

... this device in the laboratories. Its functionality is adaptible for very low level signal. The design characteristics can be easily modified for various kinds of experiments. The data processing ... in the Fig.1 This signal has the following form [5]: V sig sin(ω r t + θ sig ) where V sig is an amplitude of signal. The reference signal is of form: V L sin(ω L t + θ ref ) The amp...

Ngày tải lên: 22/03/2014, 11:20

... picture. The adaptive rate control scheme in the H.264/AVC is composed of two layers: the GOP layer rate control and the frame layer rate control. An additional basic unit layer rate control is added ... Curve for Akiyo (b) R-D Curve for Claire   ( c ) R-D Curve for Car p hone ( d ) R-D Curve for Foreman Figure 5 R-D curves and J VT and propo...

Ngày tải lên: 20/06/2014, 22:20