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Journal of Jishou University

Protocol of Selective Repeat Based on the Data Link Layer

Pei Zhang

Published Jan 1, 2013• 0 citations
OpenAlex

Abstract

Qubits must be sent again when some qubit errors occur in the data frame in the quantum network between the two communicate sites.Although this repeat guarantees the data accuracy,the pressure of the communication channel is increased.In order to reduce the pressure of the channel and improve the efficiency of selective repeat protocol,the authors analyze the existing selective repeat protocol from the process of quantum states’ replication and teleportation.So the cache of the channel is introduced and the selective repeat protocol of the data link layer is improved.Furthermore,the authors compare the efficiency of protocol and the utilization ratio of channel with previous scheme and provide a reference for seeking more effective and efficient communication means.

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Qubits must be sent again when some qubit errors occur in the data frame in the quantum network between the two communicate sites.Although this repeat guarantees the data accuracy,the pressure of the communication channel is increased.In order to reduce the pressure of the channel and improve the efficiency of selective repeat protocol,the authors analyze the existing selective repeat protocol from the process of quantum states’ replication and teleportation.So the cache of the channel is introduced and the selective repeat protocol of the data link layer is improved.Furthermore,the authors compare the efficiency of protocol and the utilization ratio of channel with previous scheme and provide a reference for seeking more effective and efficient communication means.
In this paper we study the quantum selective repeat protocol of data link layer based on quantum teleportation. When two sites are communicating in the physical layer, the sender divides a series of qubits intom frames by adding auxiliary qubits. After continuously transmitting m quantum frames, the receiver judges whether he receives the correct quantum frame according to the classical information provided by the sender. If the receiver receives the correct quantum frames, he returns confirmed frames using the quantum channel. If the correct quantum frames are not received, the receiver does not return denial frames. The sender judges quantum frames which he must resend according to the received confirm frames in setting time. Because the sender resends only the quantum frames which are lost or mistaken, this protocol reduces the transmission delay and improves communication efficiency. In the entire course of communications, the classical channel is used only to transmit the survey information, thus its burden is reduced.
From the classical selective repeat ARQ (Automatic Repeat-reQuest) protocol, a selective repeat ARQ quantum synchronous communication protocol in data link layer is presented by utilizing the intrinsic characteristics of quantum mechanics. The proposed protocol divides the link into the preparation and the send stages, where the message is sent via classical channel and the preparation and distribution of EPR (Einstein-Podolsky-Rosen) pairs are supposed to be accomplished at the preparation stage. The performances of several protocols in data link layer are compared and analyzed from the aspects of throughput and utilization ratio of the channel. It is shown that the proposed protocol enhances the maximum throughput and the utilization ratio of the channel effectively and improves the performance of the selective repeat ARQ protocol for date link layers. The proposed protocol is of great significance in military communications.
While the communication between two sites in the quantum network is carried out,the data frames should be resent once the bit-reversed errors appear.Although this method can guarantee the accuracy of data,the pressure of channel is increased and the communication efficiency is reduced.In order to relieve the pressure of channel,the present quantum bit-reversed error correction circuits were analyzed and improved based on the replication of entanglement and the teleportation to design the seven-particle entanglement of quantum bit-reversed error correction circuits.This improvement can not correct more than three bit-reversed quantum states or phase flip error.The efficiency of protocol and utilization of channels before and after the improvement were compared,and the results show that the latter has higher data transmission utilization and it can supply reference evidence for multi-particle error correction.
The communication protocol of data link layer is studied based on quantum teleportation.When two sites communicate in data link layer,quantum frame is sent via quantum channel.When receiving quantum frame within the set time,the receiver returns to confirm frame via the quantum channel.According to the transient of quantum teleportation,the transmission delay of two sites communication is reduced;as a result,the minimum time span between two successfully delivered quantum frames can be reduced,the communication time is shortened and communication efficiency is improved.And since the sender on the transmission of quantum information is unknown,the confidentiality of information transmission is also increased.
By exploiting the entanglement correlation in quantum mechanics, a quantum communication, protocol for data link layer is proposed. The protocol divides the link into busy time and leisure time, where the data is sent via classical channel and the distribution of quantum entanglement is supposed to be completed at leisure time and the acknowledge frame is sent via quantum entanglement channel. The transmission of quantum information can be instantaneous; therefore the minimum time span between two successfully delivered data frames can be significantly reduced. It is shown that the proposed protocol enhances the maximum throughput effectively and improves the performance of the stop-and-wait protocol of data link layer.
Based on the delocalized entanglement correlation and transience of transferring quantum information of quantum teleportation, an improved quantum stop-wait communication protocol for data link layer is presented.In the previous quantum stop-wait protocols, they only send the quantum acknowledgement frame (QACK) without sending quantum negative acknowledgement frame (QNACK).In this paper, we present an improved quantum stop-wait communication protocol that sends the negative frame QNACK as soon as possible when Bob detects the error of received data frame, instead of waiting for the retransmission time tout.As a result, the minimum time span between two successfully delivered data frames can be significantly reduced, and the communication time is shortened.It is shown that our protocol enhances the maximum throughput effectively and improves the communication efficiency in the data link layer.