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Zstack Home 1.2.2a NWK Layer lose data during data transfer

Other Parts Discussed in Thread: CC2530

Dear TI,

Two CC2530 devices with Zstack home 1.2.2a,one as router,another one as enddevice。

Enddevice sends data to Router.  Approximately 37 packets every second. Every packet contains 50-65 bytes. The router loses 5 packets every 256 packets regularly. The most strange thing is that the lost packet indexs are always fixed for one transfer.  Through the sniffer log, all data have been transfered and acked.

Then I add debug code to the Router. The debug code shows that MAC Layer has received all data from the enddevice and sent data to NWK layer.  But AF layer failed to receive all data from NWK layer.

Why NWK layer loses these data?

I also trace the memory alloc fail number,but it's 0(No memory alloc fail).

Later I reduce the sending frequency from 37 to 16(16 packets one second), the router can receive all data from enddevice.