CN115190080A - Congestion control method and device and communication equipment - Google Patents
Congestion control method and device and communication equipment Download PDFInfo
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- CN115190080A CN115190080A CN202110362175.7A CN202110362175A CN115190080A CN 115190080 A CN115190080 A CN 115190080A CN 202110362175 A CN202110362175 A CN 202110362175A CN 115190080 A CN115190080 A CN 115190080A
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- H04L47/00—Traffic control in data switching networks
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Abstract
The application discloses a congestion control method, a congestion control device and communication equipment, which belong to the technical field of wireless communication, and the congestion control method of the embodiment of the application comprises the following steps: under the condition that the wireless transmission channel is determined to be congested, a target sending node discards part or all of a plurality of target coding sub-blocks to be sent, or the target sending node reduces the network coding redundancy of an original data block to be sent, wherein the target coding sub-blocks belong to the same target original data block.
Description
Technical Field
The application belongs to the technical field of wireless communication, and particularly relates to a congestion control method, a congestion control device and communication equipment.
Background
When the original data block is subjected to network coding, the original data block needs to be subjected to three steps of 'original data block segmentation', 'encoding matrix generation' and 'encoding' at a transmitting end, and the received encoded sub-block needs to be 'decoded' at a receiving end. The specific process is as follows: (1) The transmitting end divides an original data block into a plurality of (N) sub-blocks, and then codes the sub-blocks to generate a plurality of (M, M > = N) coded sub-blocks. (2) The sending end sends the M coded sub-blocks to the receiving end, and the receiving end recovers the original data block based on the received X (N = < X < = M) coded sub-blocks. Based on the characteristics of network coding, the receiving end has no bias on the received coding sub-ports, and can successfully decode the coding packet only when a matrix formed by vectors implicitly or explicitly contained in the received coding sub-blocks meets the condition of full rank of rows. The transmission is encoded through the network, so that in the case that some encoded sub-blocks are lost, the receiving end can still recover the original data based on the received encoded sub-blocks.
Through network coding, the robustness of data transmission can be enhanced, and a transmitting end and a receiving end do not need additional feedback information and are not influenced by a network topological structure. However, during the data transmission process, network congestion may occur, that is, the network cannot provide enough capacity, so that the encoded sub-blocks that have been sent from the sending end may be retained in the intermediate network node, which causes a large network delay, and may even cause buffer overflow to cause data loss.
Disclosure of Invention
The embodiment of the application provides a congestion control method, a congestion control device and communication equipment, which can reduce network delay of data transmission when a network is congested.
In a first aspect, a congestion control method is provided, including: and under the condition that the congestion of a wireless transmission channel is determined, the target sending node discards part or all of a plurality of target coding subblocks to be sent, or the target sending node reduces the network coding redundancy of an original data block to be sent, wherein a plurality of target coding subblocks belong to the same target original data block.
In a second aspect, a congestion control apparatus is provided, including: the determining module is used for determining that the wireless transmission channel is congested; the processing module is configured to discard some or all of the target encoded sub-blocks to be sent, or reduce the network encoding redundancy of an original data block to be sent, where a plurality of target encoded sub-blocks belong to the same target original data block.
A third aspect provides a communication device comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, which when executed by the processor, performs the steps of the method according to the first aspect.
In a fourth aspect, a communication device is provided, which includes a processor and a communication interface, wherein the processor is configured to implement the steps of the method according to the first aspect when executed, and the communication interface is configured to communicate with a correspondent node.
In a fifth aspect, there is provided a readable storage medium on which is stored a program or instructions which, when executed by a processor, carries out the steps of the method according to the first aspect.
In a sixth aspect, a chip is provided, the chip comprising a processor and a communication interface, the communication interface being coupled to the processor, the processor being configured to execute a program or instructions to implement the steps of the method according to the first aspect.
In a seventh aspect, a computer program and/or a program product stored on a non-volatile storage medium is provided, which program and/or program product is executed by at least one processor to carry out the steps of the method according to the first aspect.
In the embodiment of the application, under the condition that the wireless transmission channel is determined to be congested, the target sending node discards part or all of a plurality of target coding sub-blocks to be sent, or the target sending node reduces the network coding redundancy of an original data block to be sent, so that the number of the sent coding sub-blocks can be reduced, the congestion is reduced, and the network delay of data transmission is reduced.
Drawings
Fig. 1 shows a schematic diagram of a wireless communication system to which embodiments of the present application are applicable;
fig. 2 illustrates a flowchart of a congestion control method provided in an embodiment of the present application;
fig. 3 illustrates another flow chart of a congestion control method provided in an embodiment of the present application;
fig. 4 is a schematic structural diagram of a congestion control device provided in an embodiment of the application;
fig. 5 shows a schematic structural diagram of a communication device provided in an embodiment of the present application;
fig. 6 illustrates a hardware structure diagram of a terminal according to an embodiment of the present application;
fig. 7 shows a hardware structure diagram of a network device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below clearly with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments that can be derived from the embodiments given herein by a person of ordinary skill in the art are intended to be within the scope of the present disclosure.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in other sequences than those illustrated or otherwise described herein, and that the terms "first" and "second" used herein generally refer to a class and do not limit the number of objects, for example, a first object can be one or more. In addition, "and/or" in the specification and the claims means at least one of connected objects, and a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
It is noted that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, but may also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), time Division Multiple Access (TDMA), frequency Division Multiple Access (FDMA), orthogonal Frequency Division Multiple Access (OFDMA), single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably in embodiments of the present application, and the described techniques may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for purposes of example, and is used in much of the description belowNR terminology, but these techniques may also be applied to applications other than NR system applications, such as 6 th generation (6 th generation) th Generation, 6G) communication system.
Fig. 1 shows a schematic diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network-side device 12. Wherein, the terminal 11 may also be called as a terminal Device or a User Equipment (UE), the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer) or a notebook Computer, a Personal Digital Assistant (PDA), a palmtop Computer, a netbook, a super-Mobile Personal Computer (UMPC), a Mobile Internet Device (MID), a Wearable Device (Wearable Device) or a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), and other terminal side devices, the Wearable Device includes: smart watches, bracelets, earphones, glasses, and the like. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network-side device 12 may be a Base Station or a core network, where the Base Station may be referred to as a node B, an evolved node B, an access point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, a Transmit Receive Point (TRP), or some other suitable term in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, and it should be noted that, in the embodiment of the present application, only the Base Station in the NR system is taken as an example, but a specific type of the Base Station is not limited.
The congestion control scheme provided by the embodiments of the present application is described in detail below with reference to the accompanying drawings by using some embodiments and application scenarios thereof.
Fig. 2 shows a flow chart of a congestion control method in an embodiment of the present application, where the method 200 may be performed by a target sending node. In other words, the method may be performed by software or hardware installed on the target sending node. As shown in fig. 2, the method may include the following steps.
S210, the target sending node determines that the wireless transmission channel is congested.
In this embodiment of the present application, the wireless transmission channel may be an uplink transmission channel or a downlink transmission channel, and is not limited in this embodiment of the present application.
In a possible implementation manner, the target sending node may determine whether the wireless transmission channel is congested according to the currently buffered data amount to be sent, for example, when it is determined that the buffered data amount to be sent exceeds a first threshold, it is determined that the wireless transmission channel is congested. The first threshold may be determined according to practical applications, for example, the embodiment of the present application is not limited.
S212, the target sending node discards part or all of the target coding subblocks to be sent, wherein the target coding subblocks belong to the same target original data block.
In an embodiment of the present application, the target sending node may be a forwarding node of a plurality of target encoded sub-blocks. For example, integrated Access and Backhaul (IAB) network nodes. Alternatively, the target transmission node may be a Relay (Relay) terminal in the sidelink Relay.
In this embodiment, when it is determined that congestion occurs in wireless transmission, a target sending node may discard a part or all of the encoded subblocks corresponding to an original data block according to a congestion condition, so as to save transmission capacity of a network and alleviate the congestion.
In one possible implementation, the target transmitting node discarding a part of the target coded sub-blocks to be transmitted may include: the target transmitting node determines a first target number of coding sub-blocks to be discarded in the target coding sub-blocks; discarding no more than the first target number of the plurality of target encoded sub-blocks.
In one possible implementation manner, the first target number may be a first number, where the first number is determined according to the amount of data to be transmitted buffered by the target sending node and the amount of data provided by the wireless channel and capable of being transmitted. That is, in this possible implementation, the first target number to be discarded may be determined according to the buffered amount of data to be transmitted and the amount of transmittable data provided by the wireless channel. By adopting the possible implementation mode, the first target number to be discarded is determined according to the congestion situation, and the congestion situation can be rapidly relieved.
Specifically, the first number may be proportionally determined according to the buffered data amount to be transmitted and the transmittable data amount provided by the wireless channel, and the total number of the target encoded sub-blocks.
For example, assuming that the first threshold is X bytes (bytes), the current amount of data buffered by the target transmitting node is Y bytes, if Y is<Not discarding coded sub-blocks if Y = X>If not, discarding the coding sub-blocks with the discarding ratio of (Y-X)/X, i.e. the number of coding sub-blocks which can be discarded and correspond to A coding sub-blocks of the same original data block
I.e. the first amount is
In another possible implementation, the first target number is a second number, wherein the second number is a maximum number of code sub-blocks that the target original data block can discard. By adopting the possible implementation mode, the receiving end can be ensured to decode the target original data block after discarding part of the encoded sub-blocks.
Wherein the second number may be determined according to configured network coding parameters.
For example, suppose an original data block is divided into P1 original sub-blocks and then encoded into P1+ P2 encoded sub-blocks, so that at least P1 encoded sub-blocks are needed for a receiving end to recover the original data block, and therefore, for the original data block, at most P2 encoded sub-blocks can be discarded, that is, the maximum number of the discardable encoded sub-blocks of the original data block is P2.
Alternatively, the second number may be determined according to a predefined or pre-configuration, e.g. the second number may be configured by the target node. For example, the sender of data is configured, where the sender of data is a node that performs network coding on a target original data block, for example, in an IAB network, the sender may configure a central node (CU) (or an IAB host node (donor), or an IAB donor CU) to a distribution node (DU) (or an IAB node), for example, configure the maximum number of coding sub-blocks that can be discarded by the target original data block to be Q, and optionally, Q < = P2.
In yet another possible implementation, the first target number may be the minimum of the first number and the second number, i.e. the actual maximum discardable number of encoded sub-blocks of the target original data block is
In one possible implementation, if the wireless transmission channel is extremely congested, the target transmitting node may also discard all of the target coded sub-blocks to be transmitted.
Optionally, when the number of the coding sub-blocks belonging to the target original data block which need to be discarded is greater than a third number, discarding all the coding sub-blocks belonging to the target original data block; wherein the third number is pre-configured or determined by the target sending node according to pre-configured network coding parameters. That is, when the number of encoded sub-blocks that the target original data block needs to discard is greater than the third number, the target transmitting node discards all encoded sub-blocks of the target original data block.
In the above possible implementation manner, the third number may be determined by the target sending node according to the configured network coding parameters, for example, the third number may be P2 described above, that is, if the number of discarded coding sub-blocks exceeds the number of the maximum discardable coding sub-blocks, since the receiving end cannot recover the target original data block from the received coding sub-blocks, all coding sub-blocks (i.e., the plurality of target coding sub-blocks) of the target original data block may be discarded in order to alleviate congestion.
Alternatively, the third number may also be determined according to a predefined or preconfigured configuration, for example, configured by a sender of data, where the sender of data is a node that network encodes a target original data block, for example, in an IAB network, a third number may be configured for a central node (CU) (or an IAB donor node (donor), or an IAB donor CU) to a distribution node (DU) (or an IAB node), for example, the third number is configured to be N, optionally, N > = P2.
In the above possible implementation manner, the number of the coded sub-blocks belonging to the target original data block that need to be discarded may be determined according to the amount of data to be transmitted buffered by the target sending node and the amount of transmittable data provided by the wireless channel, for example, the above-mentioned data may be transmitted
In one possible implementation, when discarding the coding sub-blocks of the target coding sub-blocks that are not more than the first target number, an identification range of the discardable coding sub-blocks may be obtained first, and then the coding sub-blocks of the target coding sub-blocks that are not more than the first target number within the identification range may be discarded. Through the possible implementation mode, the discarded coding sub-block can be ensured to be the discardable coding sub-block, so that the target original data block can be recovered after the receiving end receives the coding sub-block of the target original data block.
In network coding, when a transmitting end transmits data, an original data block P is divided into K original data sub-blocks (source data segments) on average, and thus P can be expressed as:
P＝[p 1 p 2 … p K ]
wherein p is k Is a sub-block of the original data after division, and p k Each element of (a) belongs to GF (2), which is a galois field.
Then, the transmitting end generates an encoding matrix, which is as follows:
and N is the number of coded sub-blocks obtained by coding the K original data sub-blocks.
And, defining the added sum of each column of elements in the coding matrix M as "degree of freedom" d, the formula is:
the degree of freedom d follows a certain distribution which is dependent on K.
The generation rule of the nth (N belongs to 1 to N) column in the coding matrix is as follows:
(1) Firstly, d is randomly generated according to the distribution of the degree of freedom d n (representing the degree of freedom of the nth encoded packet);
(2) Let m k,n =1, wherein K is d taken randomly from 1 to K n The value of each number.
Then, the hair-pound end is coded
C＝PM＝[c 1 c 2 … c N ]
Wherein, [ c ] 1 c 2 … c N ]Is N encoded sub-blocks.
For the receiving end, decoding is performed after enough encoded sub-blocks are received. Both the transmitting and receiving ends need to have the original data sub-block number (i.e. the nth column vector in the coding matrix M corresponding to the nth coded packet) required for generating the coded packet. The receiving end combines the vectors corresponding to the received encoded sub-blocks into a matrix H, and when H satisfies the condition of full rank of the row (rank (H) = K), it means that the currently received code is sufficient for decoding.
Taking out the column vectors forming the full rank of the row and the corresponding coding packets in the matrix H to form a new coding matrix H 'and a new coding sub-block vector C', so that the original data can be obtained as follows:
[p 1 p 2 … p K ]＝C′H ′-1
and combining the obtained original data sub-blocks in sequence, namely completely recovering to obtain an original data block P.
Therefore, for the original data block, the receiving end can decode the original data block as long as the received encoded sub-blocks can form a full-rank matrix H. Accordingly, the identification range of the discardable coded sub-blocks may include identification of coded sub-blocks of the target coded sub-blocks other than coded sub-blocks capable of forming a matrix of a full rank.
The target transmitting node can determine the identification range of the discardable coding subblocks according to the network coding parameters of the transmitting end. Alternatively, the identification range of the discardable coding sub-blocks may also be pre-configured. For example, the sender of data is configured, where the sender of data is a node that performs network coding on a target original data block, for example, in an IAB network, a central node (CU) (or an IAB host node (donor an IAB donor CU) may be configured with an identification range of discardable coding sub-blocks to a distribution node (DU) (or an IAB node).
In another possible implementation, the target network node may also randomly discard no more than the first target number of code subblocks from the plurality of target code subblocks.
In one possible implementation, after the target network node performs congestion control, the congestion of the wireless transmission channel may be relieved, in which case, in order to ensure reliability of data transmission, the target network node may recover the transmission mode before congestion. Therefore, in this possible implementation, after the target transmitting node discards part of the target coded sub-blocks to be transmitted, the method further includes: and determining that the congestion of the wireless transmission channel is relieved, and stopping discarding part or all of the target coding sub-blocks to be sent.
For example, after the target sending node sends the target coded sub-block according to discarding of part or all of the target coded sub-blocks to be sent, if the cache data amount of the target sending node may be lower than the second threshold, the target sending node determines that the congestion is relieved, and in the subsequent sending process, the coded sub-block to be sent is not discarded. The second threshold may be the same as or different from the first threshold, and may be smaller than the first threshold, for example.
In the congestion control method provided in this embodiment of the present application, when it is determined that a wireless transmission channel (uplink or downlink) is congested, a target network node may discard a part or all of the coded sub-blocks corresponding to an original data block according to a congestion condition, for example, an amount of buffered data to be sent, so as to save a transmission capacity of a network, alleviate the congestion condition, and avoid a network delay caused by a coded sub-block sent by a sending end staying in an intermediate network node and a data loss possibly caused by buffer overflow.
Fig. 3 shows another flow chart of the congestion control method in the embodiment of the present application, and this method 300 may be executed by a target sending node. In other words, the method may be performed by software or hardware installed on the target sending node. As shown in fig. 3, the method may include the following steps.
S310, the target sending node determines that the wireless transmission channel is congested.
The step is the same as S210, and refer to the description of the method 200, which is not described herein again.
S312, the target sending node reduces the network coding redundancy of the original data block to be sent.
In this embodiment of the present application, a target sending node is a sending end of an original data block, that is, a node that performs network coding on the original data block, and may be referred to as a network coding end.
In the embodiment of the application, when determining that the wireless transmission channel is congested, the target sending node can reduce the network coding redundancy of the original data block to be sent, so that the coding sub-blocks of the sent original data block can be reduced, the transmission capacity of the network is saved, and the congestion condition is relieved.
For example, in an IAB system, a CU may configure a donor-DU or access an IAB node to dynamically adjust network coding redundancy according to the congestion state of the radio transmission path. If the cached data to be sent is higher than a threshold A bytes, the coding redundancy is reduced, and if the cached data to be sent is lower than a threshold B bytes, the coding redundancy can be recovered.
In one possible implementation manner, the reducing, by the target transmitting node, the network coding redundancy of the original data block to be transmitted may include: and the target sending node uses a first codebook to perform network coding on the original data subblock of the original data block to be sent, and sends a second target number of coded subblocks in a plurality of coded subblocks obtained by network coding, wherein the first codebook is a codebook used by the target sending node when the wireless transmission channel is determined to be congested, and the second target number is smaller than the total number of the plurality of coded subblocks obtained by network coding and is greater than or equal to the minimum number of coded subblocks required by the original data block recovery.
That is, the target transmitting node (i.e., the transmitting end) keeps the codebook of the network coding (i.e., the coding matrix M) unchanged, and transmits only a part of the coded sub-blocks. Wherein the number of transmitted encoded sub-blocks is greater than or equal to the minimum number of encoded sub-blocks required to recover the original data block. For example, P1 in method 100 above.
In another possible implementation manner, the reducing, by the target transmitting node, the network coding redundancy of the original data block to be transmitted may include: and the target transmitting node performs network coding on the original data subblock of the original data block to be transmitted by using a second codebook and transmits a plurality of coded subblocks obtained by network coding, wherein the coding redundancy of the second codebook is lower than that of the first codebook.
That is, the target transmission node, i.e., the transmission end) adjusts the redundancy of network coding by adjusting a codebook (coding matrix M) of the network coding. In this possible implementation manner, the target transmitting node may configure a plurality of codebooks, and the target transmitting node selects the codebook used by the current network coding from these codebooks. When the network is congested or the congestion is increased, a codebook with low coding redundancy is selected. For example, in an IAB network, a CU may configure a network encoder (i.e., transmitter) with a plurality of codebooks of different coding redundancies.
In the above possible implementation manner, optionally, in order to enable a receiving end to obtain a codebook currently used by a transmitting end, if the target transmitting node uses a second codebook to perform network coding on an original data sub-block of the original data block to be transmitted, information of the second codebook may be notified to the receiving end. For example, the target sending node carries the information of the second codebook in a packet header of a Backhaul Adaptation Protocol (BAP) for sending; or, the target transmitting node may also carry the information of the second codebook in a packet header of the coding sub-block for transmission.
In a possible implementation manner, after the target sending node reduces the network coding redundancy of the original data block to be sent and sends data, congestion of a wireless transmission channel may be relieved, and in order to ensure reliability of data transmission, in this possible implementation manner, the method may further include: and determining the congestion relief of the wireless transmission channel, and adjusting the redundancy of network coding on the original data block to be transmitted. That is, when congestion is relieved, the target transmitting node may select a default codebook or a codebook with a slightly higher coding redundancy.
It should be noted that, in the congestion control method provided in the embodiment of the present application, the execution subject may be a congestion control device, or a control module in the congestion control device, configured to execute the congestion control method. In the embodiment of the present application, a method for a congestion control device to perform congestion control is taken as an example to describe the congestion control device provided in the embodiment of the present application.
Fig. 4 is a schematic structural diagram of a congestion control apparatus according to an embodiment of the present application, and as shown in fig. 4, the apparatus 400 may include: a determination module 401 and a processing module 402.
In this embodiment of the present application, the determining module 401 is configured to determine that congestion occurs in a wireless transmission channel; a processing module 402, configured to discard some or all of target encoded sub-blocks to be sent, or reduce network encoding redundancy of an original data block to be sent, where the target encoded sub-blocks belong to the same target original data block.
In one possible implementation manner, the determining module 401 determines that congestion occurs in a wireless transmission channel, including:
and judging that the cached data volume to be sent exceeds a first threshold.
In one possible implementation, the discarding, by the processing module 402, a part of the target coded sub-blocks to be transmitted includes:
determining a first target number of code sub-blocks of the plurality of target code sub-blocks to be discarded;
discarding no more than the first target number of the plurality of target encoded sub-blocks.
In one possible implementation, the determining, by the processing module 402, a first target number of coding sub-blocks to be discarded from among the target coding sub-blocks includes:
determining the first target number to be one of:
a first quantity, wherein the first quantity is determined according to the data volume to be transmitted cached by the target sending node and the transmittable data volume provided by the wireless channel;
a second number, wherein the second number is a maximum number of code sub-blocks that the target original data block can discard;
a minimum of the first number and the second number.
In one possible implementation, the second number is determined according to a predefined or preconfigured or the second number is determined according to configured network coding parameters.
In one possible implementation, the processing module 402 discards all of the target coded sub-blocks to be sent, including:
when the number of the coding sub-blocks which belong to the target original data block and need to be discarded is larger than a third number, discarding all the coding sub-blocks which belong to the target original data block; wherein the third number is determined according to a predefined or preconfigured or the third number is determined according to configured network coding parameters.
In one possible implementation, the discarding, by the processing module 402, no more than the first target number of encoded sub-blocks of the plurality of target encoded sub-blocks comprises:
acquiring an identification range of a discardable coding subblock;
discarding no more than the first target number of encoded sub-blocks of a plurality of the target encoded sub-blocks within the identified range.
In one possible implementation, the identification range of the discardable coded sub-block is pre-configured.
In one possible implementation, the discarding, by the processing module 402, no more than the first target number of encoded sub-blocks of the plurality of target encoded sub-blocks comprises:
randomly discarding no more than a first target number of encoded sub-blocks from the plurality of the target encoded sub-blocks.
In one possible implementation manner, the processing module 402 is further configured to determine that congestion of the wireless transmission channel is relieved after discarding a part of the target coded sub-blocks to be sent, and stop discarding a part or all of the target coded sub-blocks to be sent.
In one possible implementation manner, the processing module 402 reduces the network coding redundancy of an original data block to be transmitted, including:
using a first codebook to perform network coding on an original data subblock of the original data block to be sent, and sending a second target number of coded subblocks in a plurality of coded subblocks obtained by network coding, wherein the first codebook is a codebook used by a target sending node when the wireless transmission channel is determined to be congested, and the second target number is smaller than the total number of the plurality of coded subblocks obtained by network coding and is greater than or equal to the minimum number of coded subblocks required by the original data block recovery; alternatively, the first and second electrodes may be,
and performing network coding on the original data subblock of the original data block to be sent by using a second codebook, and sending a plurality of coded subblocks obtained by network coding, wherein the coding redundancy of the second codebook is lower than that of the first codebook.
In one possible implementation, the apparatus further includes:
a notifying module, configured to notify a receiving end of the information of the second codebook when the processing module 402 uses the second codebook to perform network coding on the original data sub-block of the original data block to be sent.
In a possible implementation manner, the notifying module notifies a receiving end of the information of the second codebook, including:
carrying the information of the second codebook in a packet header of a back-transmission adaptation protocol layer (BAP) and sending the information; alternatively, the first and second liquid crystal display panels may be,
and carrying the information of the second codebook in the packet header of the coding sub-block and sending the information.
In a possible implementation manner, the processing module 402 is further configured to determine congestion relief of the wireless transmission channel after reducing the redundancy of network coding on the original data block to be transmitted, and adjust the redundancy of network coding on the original data block to be transmitted.
The congestion control device in the embodiment of the present application may be a device, and may also be a component, an integrated circuit, or a chip in a communication device. The device may be a mobile terminal or a network node. For example, the mobile terminal may include, but is not limited to, the above-listed type of the terminal 11, and the Network node may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine, a kiosk, or the like, and the embodiments of the present application are not limited in particular.
The congestion control device in the embodiment of the present application may be a device having an operating system. The operating system may be an Android (Android) operating system, an ios operating system, or other possible operating systems, and embodiments of the present application are not limited specifically.
The congestion control device provided in the embodiment of the present application can implement each process implemented by the method embodiments in fig. 2 to fig. 3, and achieve the same technical effect, and is not described here again to avoid repetition.
Optionally, as shown in fig. 5, an embodiment of the present application further provides a communication device 500, which includes a processor 501, a memory 502, and a program or an instruction stored in the memory 502 and executable on the processor 501, where the program or the instruction is executed by the processor 501 to implement each process of the foregoing congestion control method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
An embodiment of the present application further provides a communication device, which includes a processor and a communication interface, where the processor is configured to implement each process implemented in the method embodiments in fig. 2 to fig. 3, and the communication interface is configured to communicate with a correspondent node. The embodiment of the communication device corresponds to the embodiment of the method for sending the target node, and all implementation processes and implementation manners of the embodiment of the method can be applied to the embodiment of the communication device and can achieve the same technical effect.
In a specific application, the communication device may be a terminal or a network device, and specifically, fig. 6 is a schematic diagram of a hardware structure of a terminal implementing the embodiment of the present application.
The terminal 600 includes but is not limited to: a radio frequency unit 601, a network module 602, an audio output unit 603, an input unit 604, a sensor 605, a display unit 606, a user input unit 607, an interface unit 608, a memory 609, a processor 610, and the like.
Those skilled in the art will appreciate that the terminal 600 may further comprise a power supply (e.g., a battery) for supplying power to various components, and the power supply may be logically connected to the processor 610 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system. The terminal structure shown in fig. 6 does not constitute a limitation of the terminal, and the terminal may include more or less components than those shown, or combine some components, or have a different arrangement of components, and will not be described again here.
It is to be understood that, in the embodiment of the present application, the input Unit 604 may include a Graphics Processing Unit (GPU) 6041 and a microphone 6042, and the Graphics Processing Unit 6041 processes image data of a still picture or a video obtained by an image capturing apparatus (such as a camera) in a video capturing mode or an image capturing mode. The display unit 606 may include a display panel 6061, and the display panel 6061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 607 includes a touch panel 6071 and other input devices 6072. A touch panel 6071, also referred to as a touch screen. The touch panel 6071 may include two parts of a touch detection device and a touch controller. Other input devices 6072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.
In the embodiment of the present application, the radio frequency unit 601 receives downlink data from a network side device and then processes the downlink data in the processor 610; in addition, the uplink data is sent to the network side equipment. In general, radio frequency unit 601 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.
The memory 609 may be used to store software programs or instructions as well as various data. The memory 609 may mainly include a program or instruction storage area and a data storage area, wherein the program or instruction storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playing function, an image playing function, etc.), and the like. Further, the memory 609 may include a high-speed random access memory, and may further include a nonvolatile memory, wherein the nonvolatile memory may be a Read-only memory (ROM), a programmable Read-only memory (PROM), an erasable programmable Read-only memory (erasabprom, EPROM), an electrically erasable programmable Read-only memory (EEPROM), or a flash memory. Such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.
The processor 610 is configured to, when it is determined that a wireless transmission channel is congested, drop, by a target sending node, some or all of target coding sub-blocks to be sent, or reduce, by the target sending node, network coding redundancy of an original data block to be sent, where the target coding sub-blocks belong to the same target original data block.
Specifically, the embodiment of the application further provides a network side device. As shown in fig. 7, the network device 700 includes: antenna 701, radio frequency device 702, baseband device 703. The antenna 701 is connected to a radio frequency device 702. In the uplink direction, the rf device 702 receives information through the antenna 701, and sends the received information to the baseband device 703 for processing. In the downlink direction, the baseband device 703 processes information to be transmitted and transmits the information to the radio frequency device 702, and the radio frequency device 702 processes the received information and transmits the processed information through the antenna 701.
The above-mentioned band processing apparatus may be located in the baseband apparatus 703, and the method performed by the network side device in the above embodiment may be implemented in the baseband apparatus 703, where the baseband apparatus 703 includes a processor 704 and a memory 705.
The baseband apparatus 703 may include, for example, at least one baseband board, on which a plurality of chips are disposed, as shown in fig. 7, where one of the chips, for example, the processor 704, is connected to the memory 705 to call up the program in the memory 705, so as to perform the network device operations shown in the above method embodiments.
The baseband device 703 may further include a network interface 706, such as a Common Public Radio Interface (CPRI), for exchanging information with the radio frequency device 702.
Specifically, the network side device of the embodiment of the present invention further includes: the instructions or programs stored in the memory 705 and capable of being executed on the processor 704, and the processor 704 calls the instructions or programs in the memory 705 to execute the method executed by each module shown in fig. 4, and achieve the same technical effect, and are not described herein in detail to avoid repetition.
An embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored in the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the foregoing congestion control method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
The processor may be the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.
The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to execute a program or an instruction to implement each process of the congestion control method embodiment, and can achieve the same technical effect, and in order to avoid repetition, the details are not repeated here.
It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip or a system-on-chip, etc.
The embodiments of the present application further provide a computer program and/or a program product, where the computer program and/or the program product is stored in a non-volatile storage medium, and the program and/or the program product is executed by at least one processor to implement each process of the foregoing congestion control method embodiment, and the same technical effect can be achieved, and in order to avoid repetition, details are not repeated here.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatuses in the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions recited, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (31)
1. A congestion control method, comprising:
under the condition that the wireless transmission channel is determined to be congested, a target sending node discards part or all of a plurality of target coding sub-blocks to be sent, or the target sending node reduces the network coding redundancy of an original data block to be sent, wherein the target coding sub-blocks belong to the same target original data block.
2. The method of claim 1, wherein determining that the wireless transmission channel is congested comprises:
and the target network node judges that the cached data volume to be sent exceeds a first threshold.
3. The method of claim 1, wherein the target transmitting node discards a portion of the plurality of target coded sub-blocks to be transmitted, comprising:
the target transmitting node determines a first target number of coding sub-blocks to be discarded in the target coding sub-blocks;
discarding no more than the first target number of the plurality of target encoded sub-blocks.
4. The method of claim 3, wherein determining a first target number of coding sub-blocks of the plurality of target coding sub-blocks to be discarded comprises:
determining the first target number to be one of:
a first quantity, wherein the first quantity is determined according to the data volume to be transmitted cached by the target sending node and the transmittable data volume provided by the wireless channel;
a second number, wherein the second number is a maximum number of code sub-blocks that the target original data block can discard;
a minimum of the first number and the second number.
5. The method according to claim 4, wherein the second number is determined according to a predefined or pre-configuration, or the second number is determined according to a configured network coding parameter.
6. The method of claim 1, wherein the target transmitting node discards all of the plurality of target coded sub-blocks to be transmitted, comprising:
when the number of the coding sub-blocks which are required to be discarded and belong to the target original data block is larger than a third number, discarding all the coding sub-blocks belonging to the target original data block; wherein the third number is determined according to a predefined or preconfigured or the third number is determined according to configured network coding parameters.
7. The method of claim 3, wherein discarding no more than the first target number of encoded sub-blocks of the plurality of target encoded sub-blocks comprises:
acquiring an identification range of a discardable coding subblock;
discarding no more than the first target number of encoded sub-blocks of a plurality of the target encoded sub-blocks within the identified range.
8. The method of claim 7, wherein the identification range of the discardable code sub-blocks is pre-configured.
9. The method of claim 3, wherein discarding no more than the first target number of encoded sub-blocks of the plurality of target encoded sub-blocks comprises:
randomly discarding no more than a first target number of encoded sub-blocks from the plurality of the target encoded sub-blocks.
10. The method according to any of claims 3 to 9, wherein after the target transmitting node discards part of the plurality of target coded sub-blocks to be transmitted, the method further comprises:
and determining that the congestion of the wireless transmission channel is relieved, and stopping discarding part or all of the target coding sub-blocks to be sent.
11. The method of any of claims 3 to 9, wherein the target transmitting node is a forwarding node of the plurality of target encoded sub-blocks.
12. The method of claim 1, wherein the target transmitting node reduces network coding redundancy of an original data block to be transmitted, comprising:
the target sending node uses a first codebook to perform network coding on the original data subblock of the original data block to be sent, and sends a second target number of coded subblocks in a plurality of coded subblocks obtained by network coding, wherein the first codebook is a codebook used by the target sending node when the wireless transmission channel is determined to be congested, and the second target number is smaller than the total number of the plurality of coded subblocks obtained by network coding and is greater than or equal to the minimum number of coded subblocks required by the original data block recovery; alternatively, the first and second electrodes may be,
and the target transmitting node performs network coding on the original data subblock of the original data block to be transmitted by using a second codebook and transmits a plurality of coded subblocks obtained by the network coding, wherein the coding redundancy of the second codebook is lower than that of the first codebook.
13. The method of claim 12, further comprising:
and if the target transmitting node uses a second codebook to perform network coding on the original data subblock of the original data block to be transmitted, notifying the receiving end of the information of the second codebook.
14. The method of claim 13, wherein notifying a receiving end of the information of the second codebook comprises:
carrying the information of the second codebook in a packet header of a back-transmission adaptation protocol layer (BAP) and sending the information; alternatively, the first and second electrodes may be,
and carrying the information of the second codebook in the packet header of the coding sub-block and sending the information.
15. The method of claim 12, wherein after the target transmitting node reduces network coding redundancy of an original data block to be transmitted, the method further comprises:
and determining the congestion relief of the wireless transmission channel, and adjusting the redundancy of network coding on the original data block to be transmitted.
16. A congestion control apparatus, comprising:
the determining module is used for determining that congestion occurs in a wireless transmission channel;
the processing module is configured to discard some or all of the target encoded sub-blocks to be sent, or reduce the network encoding redundancy of an original data block to be sent, where a plurality of target encoded sub-blocks belong to the same target original data block.
17. The apparatus of claim 16, wherein the means for determining determines that the wireless transmission channel is congested comprises:
and judging that the cached data volume to be sent exceeds a first threshold.
18. The apparatus of claim 16, wherein the processing module discards partial encoded sub-blocks of a plurality of target encoded sub-blocks to be transmitted, comprising:
determining a first target number of coding sub-blocks to be discarded from the plurality of target coding sub-blocks;
discarding no more than the first target number of encoded sub-blocks of the plurality of target encoded sub-blocks.
19. The apparatus of claim 18, wherein the processing module determines a first target number of coding sub-blocks of the plurality of target coding sub-blocks to be discarded, comprising:
determining the first target number to be one of:
a first quantity, wherein the first quantity is determined according to the data volume to be transmitted cached by the target sending node and the transmittable data volume provided by the wireless channel;
a second number, wherein the second number is a maximum number of code sub-blocks that the target original data block can discard;
a minimum of the first number and the second number.
20. The apparatus of claim 19, wherein the second number is determined according to a predefined or preconfigured configuration, or wherein the second number is determined according to a configured network coding parameter.
21. The apparatus of claim 16, wherein the processing module discards all of the plurality of target coded sub-blocks to be transmitted, comprising:
when the number of the coding sub-blocks which are required to be discarded and belong to the target original data block is larger than a third number, discarding all the coding sub-blocks belonging to the target original data block; wherein the third number is determined according to a predefined or preconfigured or the third number is determined according to configured network coding parameters.
22. The apparatus of claim 18, wherein the processing module discards no more than the first target number of encoded sub-blocks of the plurality of target encoded sub-blocks, comprising:
acquiring an identification range of a discardable coding subblock;
discarding no more than the first target number of the target number of encoded sub-blocks in the identified range.
23. The apparatus of claim 22, wherein the range of identities of the discardable code subblocks is pre-configured.
24. The apparatus of claim 18, wherein the processing module discards no more than the first target number of encoded sub-blocks of the plurality of target encoded sub-blocks, comprising:
randomly discarding no more than a first target number of encoded sub-blocks from the plurality of the target encoded sub-blocks.
25. The apparatus according to any one of claims 18 to 24, wherein the processing module is further configured to determine congestion relief of the wireless transmission channel after discarding a part of the target coded sub-blocks, and stop discarding some or all of the target coded sub-blocks.
26. The apparatus of claim 16, wherein the processing module reduces network coding redundancy of an original data block to be transmitted, comprising:
using a first codebook to perform network coding on an original data subblock of the original data block to be sent, and sending a second target number of coded subblocks in a plurality of coded subblocks obtained by network coding, wherein the first codebook is a codebook used by a target sending node when the wireless transmission channel is determined to be congested, and the second target number is smaller than the total number of the plurality of coded subblocks obtained by network coding and is greater than or equal to the minimum number of coded subblocks required by the original data block recovery; alternatively, the first and second electrodes may be,
and network coding the original data subblock of the original data block to be sent by using a second codebook, and sending a plurality of coded subblocks obtained by network coding, wherein the coding redundancy of the second codebook is lower than that of the first codebook.
27. The apparatus of claim 26, further comprising:
and the notification module is used for notifying the information of the second codebook to a receiving end under the condition that the processing module uses the second codebook to perform network coding on the original data subblock of the original data block to be sent.
28. The apparatus of claim 27, wherein the notifying module notifies a receiving end of the information of the second codebook, comprising:
carrying the information of the second codebook in a packet header of a back-transmission adaptation protocol layer (BAP) and sending the information; alternatively, the first and second electrodes may be,
and carrying the information of the second codebook in the packet header of the coding sub-block and sending the information.
29. The apparatus of claim 26, wherein the processing module is further configured to determine congestion relief of the wireless transmission channel and adjust redundancy of network coding of the original data block to be transmitted after reducing redundancy of network coding of the original data block to be transmitted.
30. A communication device comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the steps of the congestion control method according to any of claims 1 to 15.
31. A readable storage medium, characterized in that it stores thereon a program or instructions which, when executed by a processor, implement the steps of the congestion control method according to any of claims 1 to 15.
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| CN202110362175.7A CN115190080A (en) | 2021-04-02 | 2021-04-02 | Congestion control method and device and communication equipment |
| PCT/CN2022/083245 WO2022206649A1 (en) | 2021-04-02 | 2022-03-28 | Congestion control method and apparatus, and communication device |
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| CN202110362175.7A CN115190080A (en) | 2021-04-02 | 2021-04-02 | Congestion control method and device and communication equipment |
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