Description: IA4420 工作在315/433/868/915MHz 频段（IA4421 工作在433/868/915MHz 频段）；
2． 低电压工作，工作电压2.2V~5.4V；
3． 低功耗模式，待机电流0.3uA；
4． 调制模式FSK，并具备高度集成的PLL；
5． 低发射功率、高接收灵敏度设计，发射功率5~10 dbm 可调，接收灵敏度-109 dbm；
6． 内置时钟输出，可省掉MCU 的晶振；
7． 传输数据率高，数字信号可达115.2 kbit/s,模拟信号可达256 kbit/s；
8． 发射频偏与接收带宽可调；
9． 内部有数字滤波器，并可以根据要求选择不同的方式；
10． SPI 的控制接口，方便使用；
11． 接收时有数据同步码识别器，系统检测同步码后将后面的数据输出；
12． 有16 位的收发缓存器，用来缓存接收到或要发送的数据（接收数据有两种方式，用户可以按需选择）；
13． 有低电压检测器，从2.2-5.4V 可调；
14． 有定时唤醒功能，定时时间可达几天；
15． 天线的兼容性强，有天线自动调节功能，并可采用PCB 或外置天线；
16． 工作温度范围-40~85，储存温度范围-55~125℃；
17． 采用微小TSSOP16 封装。
-315/433/868/915MHz IA4420 work in the band (IA4421 Working in 433 / 868/915MHz band); 2. Low-voltage, voltage 2.2 V ~ 5.4V; 3. Low-power mode, standby current 0.3 uA 169 * 85 *; 4. FSK modulation mode, and highly integrated PLL; 5. Low emission power and high receiver sensitivity, launched power 5 ~ 10 dbm adjustable, -109 dbm receiver sensitivity; 6. Built-in clock output can be saved MCU resonator; 7. Higher data transmission rate, digital signal of up to 115.2 kbit / s, analog signal up to 256 kbit / s; 8. Emission Offset and receiving adjustable bandwidth; 9. Internal digital filters, and may request to have a choice of different ways; 10. SPI control interface, and ease of use; 11. When receiving data synchronization code identifier, the system will detect synchronous code behind the Platform: |
Size: 39433 |
Author:songxiaoyan2008 |
Hits:
Description: IA4420 工作在315/433/868/915MHz 频段（IA4421 工作在433/868/915MHz 频段）；
2． 低电压工作，工作电压2.2V~5.4V；
3． 低功耗模式，待机电流0.3uA；
4． 调制模式FSK，并具备高度集成的PLL；
5． 低发射功率、高接收灵敏度设计，发射功率5~10 dbm 可调，接收灵敏度-109 dbm；
6． 内置时钟输出，可省掉MCU 的晶振；
7． 传输数据率高，数字信号可达115.2 kbit/s,模拟信号可达256 kbit/s；
8． 发射频偏与接收带宽可调；
9． 内部有数字滤波器，并可以根据要求选择不同的方式；
10． SPI 的控制接口，方便使用；
11． 接收时有数据同步码识别器，系统检测同步码后将后面的数据输出；
12． 有16 位的收发缓存器，用来缓存接收到或要发送的数据（接收数据有两种方式，用户可以按需选择）；
13． 有低电压检测器，从2.2-5.4V 可调；
14． 有定时唤醒功能，定时时间可达几天；
15． 天线的兼容性强，有天线自动调节功能，并可采用PCB 或外置天线；
16． 工作温度范围-40~85，储存温度范围-55~125℃；
17． 采用微小TSSOP16 封装。
-315/433/868/915MHz IA4420 work in the band (IA4421 Working in 433/868/915MHz band); 2. Low-voltage, voltage 2.2 V ~ 5.4V; 3. Low-power mode, standby current 0.3 uA 169* 85*; 4. FSK modulation mode, and highly integrated PLL; 5. Low emission power and high receiver sensitivity, launched power 5 ~ 10 dbm adjustable,-109 dbm receiver sensitivity; 6. Built-in clock output can be saved MCU resonator; 7. Higher data transmission rate, digital signal of up to 115.2 kbit/s, analog signal up to 256 kbit/s; 8. Emission Offset and receiving adjustable bandwidth; 9. Internal digital filters, and may request to have a choice of different ways; 10. SPI control interface, and ease of use; 11. When receiving data synchronization code identifier, the system will detect synchronous code behind the Platform: |
Size: 38912 |
Author: |
Hits:
Description: 使用威尔配对,本文提出了一种基于身份的环签密方案,给出了具体的算法.该方案能够使消息的
发送者以一种完全匿名的方式发送消息,并且同时实现保密性和认证性两种功能.我们证明了在决策双线性Diffie-
Hellman问题难解的假设下,新提出的方案对自适应选择密文攻击是安全的.与传统的先签名后加密的方案
相比,本方案中密文长度有了明显的降低,在低带宽的要求下更加可行.-Will the use of matching, this paper, a ring of identity-based signcryption program, given a specific algorithm. The program will enable the sender information in a completely anonymous way to send messages, and at the same time to achieve confidentiality and authentication of two functions. We prove that in the decision-making bilinear Diffie-Hellman problem difficult to resolve under the assumption that the new proposal for adaptive chosen ciphertext attack is safe. with the traditional first signed encrypted program compared ciphertext of the program significantly reduced the length, in the low-bandwidth request more feasible. Platform: |
Size: 98304 |
Author:张莹 |
Hits:
Description: 本文从提高系统的带宽利用率的角度出发，充分利用网络流量的自相似
特性，提出了一种能有效提高上行带宽利用率的动态分配算法-In this thesis， dynamic bandwidth allocation algorithm TGOGT where the
two groups of ONU are granted in turn and allocation bandwidth according to the
characteristic of network traffic and their delay request for different service is brought
forward In TGOGT,all ONUs in the system are departed into two groups，and the
queue-threshold was set for every group．Two groups of ONUs report and grant in turn，
as the network load changes，OLT converts the way of granting every ONU． Platform: |
Size: 1975296 |
Author:kite |
Hits:
Description: The objective of this project is to simulate an advance reservation system that is used to
reserve bandwidth for connections in a mesh network of LSRs in advance of the time that
the connections are required. In this project, we will assume reservations with blocking.
That is, a reservation request is blocked if network resources cannot be reserved within a
certain window of time defined by the reservation request.-The objective of this project is to simulate an advance reservation system that is used to
reserve bandwidth for connections in a mesh network of LSRs in advance of the time that
the connections are required. In this project, we will assume reservations with blocking.
That is, a reservation request is blocked if network resources cannot be reserved within a
certain window of time defined by the reservation request. Platform: |
Size: 3089408 |
Author:bou33aza |
Hits:
Description: 为了节约无线领域的带宽资源，表中分配数值即为每个域名关键字使用预定义的二进制编码，MMS PDU封装的二进制编码的基本编码机制来源于WAP/WSP，最优化在空中传播的数据量。MMS PDU生成及翻译是MMS客户机程序的重要组成部分。其它类型的PDU头域大致和发送请求(M-Send.req)的头域是类似的。-MMS PDU header field in order to save the wireless bandwidth resources allocated in the table value is predefined for each domain name keyword binary encoding, the basic encoding mechanism of the binary encoding of MMS PDU package from the WAP/WSP, optimized in airborne data. MMS PDU generation and Translation is an important part of the MMS client program. Other types of PDU header field is broadly in line and send the request (the head domain of the M-Send.req) is similar. Platform: |
Size: 98304 |
Author:steven |
Hits:
Description: tcpcopy是一种应用请求复制（基于tcp的packets）工具，其应用领域较广，我们曾经应用于网易的广告投放系统，urs系统，nginx hmux协议开发等系统，避免了上线带来的很多问题。 总体说来，tcpcopy主要有如下功能： 1）分布式压力测试工具，利用在线数据，可以测试系统能够承受的压力大小（远比ab压力测试工具真实地多）,也可以提前发现一些bug 2）对于后端的短连接，请求丢失率非常低(1/10万)，可以应用于热备份 3）普通上线测试，可以发现新系统是否稳定，提前发现上线过程中会出现的诸多问题，让开发者有信心上线 4）对比试验，同样请求，针对不同或不同版本程序，可以做性能对比等试验 5）利用多种手段，构造无限在线压力，满足中小网站压力测试要求 6）实战演习（架构师必备） tcpcopy可以用于实时和离线回放领域，并且tcpcopy支持mysql协议的复制，开源一年以来，功能上越来越完善。 如果你对上线没有信心，如果你的单元测试不够充分，如果你对新系统不够有把握，如果你对未来的请求压力无法预测，tcpcopy可以帮助你解决上述难题。- tcpcopy It is an online TCP duplication tool and can be used for testing (using netlink and raw sockets). Description: It can help you find bugs without deploying your server software on your production servers.It can also be used to do smoke testing against your products. For example, when you want to migrate your web server from Apache to Nginx, tcpcopy can help you test it. Apache is running online, while tcpcopy can copy the TCP flows from Apache to Nginx. To Nginx, the TCP flows are just forwarding to it. This will not affect Apache at all except cost a little network bandwidth and CPU load. Scenarios: 1) Distributed stress testing Use tcpcopy to copy real-world data to stress test your server software. Bugs that only can be produced in high-stress situations can be found. 2) Hot backup It is very suitable for backup tasks if connections are short-lived. The request loss ratio is quite low (e.g. 0.00001). 3) Online testing Prove Platform: |
Size: 106496 |
Author:林鹏 |
Hits:
Description: tcpcopy是一种应用请求复制（基于tcp的packets）工具，其应用领域较广，我们曾经应用于网易的广告投放系统，urs系统，nginx hmux协议开发等系统，避免了上线带来的很多问题。 总体说来，tcpcopy主要有如下功能： 1）分布式压力测试工具，利用在线数据，可以测试系统能够承受的压力大小（远比ab压力测试工具真实地多）,也可以提前发现一些bug 2）对于后端的短连接，请求丢失率非常低(1/10万)，可以应用于热备份 3）普通上线测试，可以发现新系统是否稳定，提前发现上线过程中会出现的诸多问题，让开发者有信心上线 4）对比试验，同样请求，针对不同或不同版本程序，可以做性能对比等试验 5）利用多种手段，构造无限在线压力，满足中小网站压力测试要求 6）实战演习（架构师必备） tcpcopy可以用于实时和离线回放领域，并且tcpcopy支持mysql协议的复制，开源一年以来，功能上越来越完善。 如果你对上线没有信心，如果你的单元测试不够充分，如果你对新系统不够有把握，如果你对未来的请求压力无法预测，tcpcopy可以帮助你解决上述难题。- tcpcopy It is an online TCP duplication tool and can be used for testing (using netlink and raw sockets). Description: It can help you find bugs without deploying your server software on your production servers.It can also be used to do smoke testing against your products. For example, when you want to migrate your web server from Apache to Nginx, tcpcopy can help you test it. Apache is running online, while tcpcopy can copy the TCP flows from Apache to Nginx. To Nginx, the TCP flows are just forwarding to it. This will not affect Apache at all except cost a little network bandwidth and CPU load. Scenarios: 1) Distributed stress testing Use tcpcopy to copy real-world data to stress test your server software. Bugs that only can be produced in high-stress situations can be found. 2) Hot backup It is very suitable for backup tasks if connections are short-lived. The request loss ratio is quite low (e.g. 0.00001). 3) Online testing Prove Platform: |
Size: 97280 |
Author:林鹏 |
Hits:
Description: tcpcopy是一种应用请求复制（基于tcp的packets）工具，其应用领域较广，我们曾经应用于网易的广告投放系统，urs系统，nginx hmux协议开发等系统，避免了上线带来的很多问题。 总体说来，tcpcopy主要有如下功能： 1）分布式压力测试工具，利用在线数据，可以测试系统能够承受的压力大小（远比ab压力测试工具真实地多）,也可以提前发现一些bug 2）对于后端的短连接，请求丢失率非常低(1/10万)，可以应用于热备份 3）普通上线测试，可以发现新系统是否稳定，提前发现上线过程中会出现的诸多问题，让开发者有信心上线 4）对比试验，同样请求，针对不同或不同版本程序，可以做性能对比等试验 5）利用多种手段，构造无限在线压力，满足中小网站压力测试要求 6）实战演习（架构师必备） tcpcopy可以用于实时和离线回放领域，并且tcpcopy支持mysql协议的复制，开源一年以来，功能上越来越完善。 如果你对上线没有信心，如果你的单元测试不够充分，如果你对新系统不够有把握，如果你对未来的请求压力无法预测，tcpcopy可以帮助你解决上述难题。- tcpcopy It is an online TCP duplication tool and can be used for testing (using netlink and raw sockets). Description: It can help you find bugs without deploying your server software on your production servers.It can also be used to do smoke testing against your products. For example, when you want to migrate your web server from Apache to Nginx, tcpcopy can help you test it. Apache is running online, while tcpcopy can copy the TCP flows from Apache to Nginx. To Nginx, the TCP flows are just forwarding to it. This will not affect Apache at all except cost a little network bandwidth and CPU load. Scenarios: 1) Distributed stress testing Use tcpcopy to copy real-world data to stress test your server software. Bugs that only can be produced in high-stress situations can be found. 2) Hot backup It is very suitable for backup tasks if connections are short-lived. The request loss ratio is quite low (e.g. 0.00001). 3) Online testing Prove Platform: |
Size: 2048 |
Author:林鹏 |
Hits:
Search - bandwidth request