Re: [Tinyos-help] Question about lost of packets with MultiHop.
Perhaps if you use the QueuedReceive mechanism, you'll not loose as many packets? Or, if you really want to be sure you're getting the packets and you don't want to touch the radio stack, try using the RadioCoordinator interface, which allows you to be notified every time a byte is recieved. - ConorOn 7/25/06, Munaretto, Daniel [EMAIL PROTECTED] wrote: So what you mean is in tinyos-1.x is impossible to bypass this problem, isn'it?Or if there is a solution in 1.x, in my project would be really important, should you explain it?Thanks very much,CheersDaniele-Original Message-From: Philip Levis [mailto: [EMAIL PROTECTED]]Sent: Tue 7/25/2006 7:33 AMTo: José UlloaCc: Tinyos-help@Millennium.Berkeley.EDUSubject: Re: [Tinyos-help] Question about lost of packets with MultiHop. On Jul 24, 2006, at 1:21 PM, José Ulloa wrote: Hi, we are working with a network with six or more hops, and tinyos-1.x. We have detected a lost of packet in a node, after receiving the packet and sending the corresponding ACK. ¿is this posible because the radio had two packet in the RXFIFO in the moment of read? I understand, when tinyos-1.x reads the first packet, the second will be descarted by the call of flushRXFIFO from the CC2420RadioM component. ¿is this really happening? ¿someone knows a solution for this? Yes, this is really happening. It's a fairly nasty issue in the 1.xstack. The TinyOS 2.0 stack doesn't have this issue; it keeps trackof packets in the FIFO and spools them out one by one. If a packet can't fit in the FIFO, then the radio doesn't acknowledge it.Phil___Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDUhttps://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help ___Tinyos-help mailing listTinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] Question about lost of packets with MultiHop.
Philip Levis wrote: On Jul 25, 2006, at 3:33 AM, Krisakorn Rerkrai wrote: Does this mean these two packets are both acknowledged but the second one in the FIFO is flushed out? Yes. Could I be so lucky, that this feature is documented somewhere(besides this thread)? ;o) /Peter ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
RE: [Tinyos-help] Question about lost of packets with MultiHop.
So what you mean is in tinyos-1.x is impossible to bypass this problem, isn'it? Or if there is a solution in 1.x, in my project would be really important, should you explain it? Thanks very much, Cheers Daniele -Original Message- From: Philip Levis [mailto:[EMAIL PROTECTED] Sent: Tue 7/25/2006 7:33 AM To: José Ulloa Cc: Tinyos-help@Millennium.Berkeley.EDU Subject: Re: [Tinyos-help] Question about lost of packets with MultiHop. On Jul 24, 2006, at 1:21 PM, José Ulloa wrote: Hi, we are working with a network with six or more hops, and tinyos-1.x. We have detected a lost of packet in a node, after receiving the packet and sending the corresponding ACK. ¿is this posible because the radio had two packet in the RXFIFO in the moment of read? I understand, when tinyos-1.x reads the first packet, the second will be descarted by the call of flushRXFIFO from the CC2420RadioM component. ¿is this really happening? ¿someone knows a solution for this? Yes, this is really happening. It's a fairly nasty issue in the 1.x stack. The TinyOS 2.0 stack doesn't have this issue; it keeps track of packets in the FIFO and spools them out one by one. If a packet can't fit in the FIFO, then the radio doesn't acknowledge it. Phil ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] Question about lost of packets with MultiHop.
Does this mean these two packets are both acknowledged but the second one in the FIFO is flushed out?On 7/25/06, Philip Levis [EMAIL PROTECTED] wrote:On Jul 24, 2006, at 1:21 PM, José Ulloa wrote: Hi, we are working with a network with six or more hops, and tinyos-1.x. We have detected a lost of packet in a node, after receiving the packet and sending the corresponding ACK. ¿is this posible because the radio had two packet in the RXFIFO in the moment of read? I understand, when tinyos-1.x reads the first packet, the second will be descarted by the call of flushRXFIFO from the CC2420RadioM component. ¿is this really happening? ¿someone knows a solution for this?Yes, this is really happening. It's a fairly nasty issue in the 1.xstack. The TinyOS 2.0 stack doesn't have this issue; it keeps trackof packets in the FIFO and spools them out one by one. If a packet can't fit in the FIFO, then the radio doesn't acknowledge it.Phil___Tinyos-help mailing listTinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] Question about lost of packets with MultiHop.
On Jul 25, 2006, at 3:33 AM, Krisakorn Rerkrai wrote: Does this mean these two packets are both acknowledged but the second one in the FIFO is flushed out? Yes. Phil ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] Question about lost of packets with MultiHop.
On Jul 25, 2006, at 12:03 AM, Munaretto, Daniel wrote: So what you mean is in tinyos-1.x is impossible to bypass this problem, isn'it? Or if there is a solution in 1.x, in my project would be really important, should you explain it? Of course it's not impossible: you can modify the stack. You want to modify the stack so that it does not flush the RXFIFO but instead spools out the packets. Phil ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] Question about lost of packets with MultiHop.
On Jul 24, 2006, at 1:21 PM, José Ulloa wrote: Hi, we are working with a network with six or more hops, and tinyos-1.x. We have detected a lost of packet in a node, after receiving the packet and sending the corresponding ACK. ¿is this posible because the radio had two packet in the RXFIFO in the moment of read? I understand, when tinyos-1.x reads the first packet, the second will be descarted by the call of flushRXFIFO from the CC2420RadioM component. ¿is this really happening? ¿someone knows a solution for this? Yes, this is really happening. It's a fairly nasty issue in the 1.x stack. The TinyOS 2.0 stack doesn't have this issue; it keeps track of packets in the FIFO and spools them out one by one. If a packet can't fit in the FIFO, then the radio doesn't acknowledge it. Phil ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
