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I recently came across an article proposing the implementation of WCDMA using mac protocol. Could someone tell me presently how WCDMA system is being implemented? And what are the advantages of using mac protocol?
Hello, Can someone help me with a Matlab code for a simulation of TDMA mac protocol (Wireless networks) using the Poisson Traffic Disytribution? Thank you :|
Hello, I am in final year medical engineering and would like to have the matlab codes for tdma mac protocol for one receiver at the earliest as it is my final year engineering project. Thank you.
hi can u help me in writing a c code for multi level multi access mac protocol?
Hello. I need a little help. I have to do a packet size optimization for a mac protocol. It is a TDMA-based mac protocol. I began with PER which is equals to 1-(1-BER)^l where l is the packet length. But I don?t know what the next step is. Is there a general way how I can do this? I?ve checked some article but those don?t (...)
can any one give tips to design a tdma mac protocol in verilog ? i have a source code from open but i couldnt understand it
yes there exists UWB mac protocol.
hi i need help in writing code for multilevel multiacess mac protocol
Hello, I was wondering if I could get some help on implementing "cross layer protocol" or "UW(Underwater)-mac protocol" in matlab? What kind of algorithm could I use? For example: Comparing BER and SNR? Thank you
Hello mahimahi A hardware adress is not 12 bytes long, it is only 48 bits (=6 bytes) long. You can see this also in your ifconfig line: you define it with 6 8-Bit values, this gives 48 bits. The length of this HW-address is fix in the low-level protocol and can not be changed. It is possible, that you set the first I will say 16 bits to zero
I want to implement my new mac layer protocol in real IEEE 802.11 network cards. I think it is not so easy and I should have the WLAN card firmware source code. Do you know where can I find any WLAN firmware source code (to any card, any mac processor)? Maybe you know where to find any other informations that can help to solve my problem. (...)
Specific questions: 1) Modulation employed 2) Data carryed on the channel (digital/controlling or analog) 3) Bandwidth required 4) A general idea of the protection need against blocking and intermodulation (or at least the operating environment) 5) Sensitivity (or Tx power and operating range indoor/outdoor) 6) Need to use channel protection
Hi, I am looking for a commercial product that implements the 802.11 protocol. Moreover, I want it to have the possiblillity to overcome the existing mac protocol and use another one, created by me. As I have searched to the net I haven't found such possibillity. If anynone knows such a product I would be very grateful. Thanx!
Everything you ever wanted to know about internet protocols (but not microcontroller programming): TCP is RFC 793. IP is RFC 791. UDP is RFC 768. ARP is RFC 826. ICMP is RFC 792. You must know your mac address *before* connecting to the internet. A ROM is a good place to store it.
MII interface is between PHY and mac for 10/100 ethernet and GMII is the interface between the two for Gigabit interface. The PHY will be differeent for the both and the interface signals widths are different for both , PHY is different with respect to decoding and encocoding it does.
Hi, I'm completely out of my depth here, with little or no experience in designing Wifi...or any wireless systems, but I'll give it a whirl. My question is what is bit rate at mac level and why is it less than at physical level When information is sent wirelessly, information is added to the 'useful' information to allow t
I'm working on a WiMax project, one of the tasks is to implemenent some of the functions of the WiMax mac layer. There are Many functions that are listed in the Standard and every field of each PDU message. What i want to ask about is: (1) How can i model these functions and their fields in a C++ code "using OOP of course"? (2) Is there any too
I'm working on a WiMax project, one of the tasks is to implemenent some of the functions of the WiMax mac layer. There are Many functions that are listed in the Standard and every field of each PDU message. What i want to ask about is: (1) How can i model these functions and their fields in a C++ code "using OOP of course"? (2) Is there any
I am working on a project for which I need WiFi*, WiMAX and Bluetooth mac** Implementations. 1. I would aprreciate any advice on finding open-source implementations for these. Ideally in an HDL but even pure functional implementation in say C/MATLAB etc would help be shave off some overhead time from my project. 2. I would also appre
Dear Abu Ammora, Layer 2 consist of two (media access control) and LLC (Logical link control), The mac sublayer controls how a computer on the network gains access to the data and permission to transmit it. The LLC layer controls frame synchronization, flow control and error checking. Anyway.... protocol between switch and PC me
you've got it almost correctly. Physical layer (or layer 1) main responsibility is data transfer over radio (air). And that's a lot. Of course it has lots of many other functions, (fast power control, spreading and data coding, interleaving, etc.), but those functions are essential for data transfer over air. It depends on the viewpoint - you co
hi!I have gone through an ieee paper titled ' FDD mac protocol FOR MULTIMEDIA NETWORKS'.the paper says that bifurcating mac into layers reduces congestion and improves QOS...can someone elaborate on the layers in the present wireless channel and how is it advantageous to further split mac into diff channels.
Hi friends, In mac layer we ar coming towards two words MSDU(mac service Data Unit) and MPDU(mac protocol Data Unit).What is the difference between these two? Please help me. Thnaks in advance, Goud
The address range 192.168.x.x is private, it's not allowed on the public internet. You are probably connected to a LAN behind a router that uses NAT (network address translation). Ask your network administrator how to properly configure the router and your server. Or maybe you can disconnect the router and connect your server directly to the intern
The full name of the standard is: EEE Standard for Information technology?Telecommunications and information exchange between systems?Local and metropolitan area networks?Specific requirements?Part 11: Wireless LAN Medium Access Control (mac) and Physical Layer (PHY) specifications?Amendment 1: High-speed Physical Layer in the 5 GHz band and
Modbus can work over serial or Ethernet. If you need to implement MODBUS over a serial connection then all you need is a UART and a processor (NIOS is very good) If you need MODBUS-TCP then you need an Ethernet port instead of UART. The best resource is here: This one is also good (free tools, free code)
hello, i am MSc student currently working on my project named "Evaluation of energy saving mac protocol for wireless sensor network". i need to simulate Smac, Tmac and Gmac. could you please tell me which version of opnet is best to simulates these mac. from where or how can i download (...)
i am working on vanet , i have implemented routing protocol for connectivity dynamics, is any body to guide me how network and mac layer will be coded in program, i want to implement mimo at mac layer and routing on network. how mimo can be deploy with routing protocol. i have my density estimation model and routing (...)
Hello Guys I'm a beginner in Communication programming. I need to program a mac Layer in the 802.11 protocol and simulate. I need the generation of network traffic at the nodes. Please help me on this. Thanks in advance!
Hi, If we have two bluetooth device with same mac address and if we are sending data to that address, will both device receive the data ? Is there any possible issues like channel collision on air or some thing like that?
hi friends.. kindly hlp me out.. my thesis area is mac layer protocols in wsn using MATLAB.. i am not able to define problem..whether i should i work on enhancing an protocol. kindly suggest any protocol on which work has done and i can develop my own anothr protocol.i am not able to access IEEE papers so (...)
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We do have an Ethernet 10/100 mac IP core, How do we implement some other protocols by using hardware? such as the UDP, DLC, IPv4, ICMP and ARP? Anyone can recommand what's the first steps we should do? Thx!!
well "industrial ethernet" is a trademark of siemens it uses shielded cables with sub D connector but it is also possible to use normal UTP cables. Siemens ethernet also uses a special protocol : no ip adresses are used, but the mac adresses Monty 8)
When the Windows Media Sensing "feature" is activated and the network cable is disconnected, the link to the TCP/IP layers of the disconnected adaptor is removed. Hence, some apps which try to verify the mac adress of this adapter fail the license check. For a workaround, see more from MS at :
Hello dingo! My impression is that this is a very large project, even if you only look at the baseband processing of the receiver/transmitter. The baseband part would most likely be implemented in a DSP with HW accelerators (in FPGA/ASIC) for viterbi equalization and viterbi decoding etc. Also you need to consider the radio part, with high req
For sending packets on IP networks, is using gateway, that recives all packets, that destination is not in local Ethernet network (defined by netmask). Gateway mac address is getting by ARP protocol. Gateway send IP packet to other gateway or destination Ethernet net, if it connected directly to one gateway ethernet interface.
Hi DSP + VLSI - This is very good stream to do main project. U can design like, a CPU for mac unit ie., Implementation of VLSI for DSP Applications. Analog - Really tough. But very challenging & interesting. Very less people work in this area.
There isn't any direct converter. You should use an ethernet mac. MII is the typical communication protocol between mac and PHY.
It mainly depneds on your application, the idea of several mac is very hard to implement and will take alot of area you may use a software mac, all can be done with embedded processor like Microblaze or the PowerPC, you can do a full tcp stack while handling some of mac functions with HW, other wise it will be very costy to implement, a (...)
Hi guys .. Anyone sees a feasibility in implementing the ZigBee completely on a piece of microprocessor ? .. the whole ZigBee .. PHY .. lower mac .. Upper mac and the rest of the stack .. as Software (like in C/C++/SystemC) .. and run this software (maybe with the support of some RTOS) on a micorcontroller or embedded processor ?
MII is an interface for Ethernet communication. In typical Ethernet, you have 2 sections, the mac and the PHY. The mac take care of all the logic (sending, receiving packets). It interface between the processor and the PHY. The PHY take care of the physical signal itself. and such things as autonegotiation. The protocol used between the (...)
1Mbyte/sec is quite high speed for any 8-bit controller. First of all, you are right that you need at least a 100baseT LAN. You will have to find a suitable mac. Unless the controller is only streaming data sequentially from RAM, you need quite a powerfull controller, maybe a 32-bit controller.
In fact, we need a MCU can deal with network protocol with minimum processor speed. Can a ARM7 MCU operate at 50Mhz and intergate with ethernet mac SOC able to do that? This is based on your requirement. If you want the throughput is very high, you need some powerful CPU. Ask you chip supplier the CPU LAN port performance, then yo
basically people implement the 2 lower layers of the network protocol stack .. which are mac and PHY .. usually also people who develope the mac are different from who develope the PHY .. mac can be basically SOFTWARE written on a piece of embedded processor or microcontroller .. and for those parts of the (...)
Hi guys .. Anyone has any idea about the nature of the interface between the ZigBee silicon part (ZigBee PHY and mac) and the upper ZigBee protocol stack (on a piece of microcontroller) ? And if some one has implemented ZigBee's mac .. did you implement it as complete software running on a microcontroller .. or as hardware same as PHY (...)
I am doing some research and facing a problem. I am trying to build a low cost simple wireless network whose nodes will be devices which use 8051 microcontrollers as processing units. The problem is that the 8051s used have very little ROM, only 4K which is not enough for implementing network stack. Plus we have time constrain which does not leave
In most cases you can set the a band for ap to ap communitacion, creating a point to point connection and using mac address filtering to avoid other people to connect to your lan. The b o g band use it for attending the clients of the network. In other words, a band is for transport and b or g band for clients. I have seen this configuration sev
According to the SGMII spec, signal mapping at the mac side CRS is physically connected to RX_DV in the diagram. Text says "Carrier Sense (CRS) is derived/inferred from RX_DV" This is not consistent with Clause, IEEE 802.3-2005 According to clause 36, CRS should remain high with receive burst of frames during carrier extension