Instant communication system, clients, server and method for judging on-line state

Instant communication system, clients, server and method for judging on-line state

  • CN 101,552,740 A
  • Filed: 05/14/2009
  • Published: 10/07/2009
  • Est. Priority Date: 05/14/2009
  • Status: Active Application
First Claim
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1. , a kind of instant communication client, described client and server carry out data interaction, it is characterized in that, described client is used to receive the then timing zero clearing and picking up counting of message bag that described server sends, when timing then sends heartbeat packet to described server to first Preset Time, and whether receive the heartbeat affirmation bag that described server returns in second Preset Time of judgement after sending heartbeat packet, if do not receive, judge that then described client is in off-line state.

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