Many-to-many wireless data sending method and apparatus, and many-to-many wireless data receiving method and apparatus

Abstract

The embodiment of the invention discloses a many-to-many wireless data sending method and apparatus, and a many-to-many wireless data receiving method and apparatus. The sending method comprises the following steps: the sending apparatus broadcasts a data packet, wherein the data packet comprises an ACK index table field, and the field comprises a plurality of receiving apparatus identifiers and a value indicating whether each receiving apparatus identifier needs to replay an acknowledgement packet; the sending apparatus receives the acknowledgement packet replied by the receiving apparatus receiving the data packet; and the sending apparatus updates the ACK index table field of the data packet according to the receiving apparatus corresponding to the acknowledgement packet, and modifies the value corresponding to the receiving apparatus identifier of the received data packet as that the acknowledgement packet does not need to be replied. By adoption of the method disclosed by the invention, the data conflict generated by the simultaneous reply of the acknowledgement packets by the receiving apparatuses gradually, and regardless of receiving terminals, the sending terminal can gradually eliminate the data conflict by controlling an Ack index table in the broadcast.

Description

technical field [0001] The embodiments of the present invention relate to the field of communication technologies, and in particular, to a many-to-many wireless data sending method and a sending device, and a many-to-many wireless data receiving method and receiving device. Background technique [0002] No matter in a wired communication system or a wireless communication system, when the sending device sends a data packet to the receiving device, it needs to know whether the receiving device has received the data packet, but the difficulty of the wireless communication system compared with the wired communication system lies in this. In a wireless communication system, a complete communication logic such as figure 1 As shown: the sending device 10 sends a data packet to the receiving device 20, and when the receiving device 20 receives the data packet, it immediately returns an acknowledgment packet to the sending device 10, and receiving the acknowledgment packet indicates...

AI Technical Summary

Problems solved by technology

In an actual network, it usually includes multiple sending devices and multiple receiving devices. In the case of many-to-many wireless data packet transmission, there will be the following situation: If one sending device sends data packets to multiple receiving devices, if there is no AckTable controls the acknowledgment packet, and multiple receiving devices 20 will reply to the acknowledgment packet after receiving the data each time, because the receiving device will immediately reply to the acknowledgment packet as soon as it receives the data packet from the sending device, which will cause 2.4 in the corresponding frequency band at the same time period. GHz radio frequency signals interfere with each other, and data collisions are serious

In addition, for a receiving device with a weaker transmission strength, the sending device may never receive the reply acknowledgment packet

As a result, the sending device repeatedly sends the previous data packets many times when the confirmation packet cannot be completely received, resulting in a heavy operating burden on the sending device and a waste of communication frequency band resources

[0003] In the process of implementing the present invention, the inventors found that there are at least the following problems in the prior art: in many-to-many wireless data communication, when the sending device broadcasts data packets to multiple receiving devices, multiple receiving devices reply with confirmation packets at the same time It will cause the collision of confirmation packets, affect the accurate reception of confirmation packets, and the confirmation packets replied by receiving devices with weak transmission strength will not be received.

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