WO2023140534A1

WO2023140534A1 - Data distribution method, and electronic device for performing same

Info

Publication number: WO2023140534A1
Application number: PCT/KR2023/000062
Authority: WO
Inventors: 윤태호; 김수진; 하태호
Original assignee: 삼성전자주식회사
Priority date: 2022-01-21
Filing date: 2023-01-03
Publication date: 2023-07-27

Abstract

Disclosed are: a data distribution method; and an electronic device for performing the method. The electronic device according to various embodiments includes a processor that can: transmit the data by distributing same between a first distribution unit and a second distribution unit, which transmit the data to a user terminal; identify a congestion state associated with the traffic load of the second distribution unit; and limit the distribution of the data to the second distribution unit on the basis of the congestion state.

Description

Data distribution method and electronic device performing the method

The disclosure below relates to a data distribution method, and an electronic device for performing the method.

Traffic transmission in the downlink direction in a split bearer of E-UTRAN new radio (EN)-dual connectivity (DC) flows in the 3rd generation partnership project (3GPP) 45.425 standard. It is defined to follow control.

Traffic distribution through the DC split bearer divides one bearer into a long term evolution (LTE) cell and a new radio (NR) cell. If a delay is caused in one of the LTE cell and the NR cell, packet reordering timeout may be caused in the UE, and overall communication performance may be lowered.

In the non-standalone (NSA) method of performing communication using an LTE cell and an NR cell in an EN-DC network, when the number of UEs accessing the LTE cell increases and there is a traffic request that exceeds the performance of the LTE cell, delay may occur due to congestion. Even in a UE capable of performing communication using NR in the NSA scheme, packet reordering timeout may be caused due to LTE cell congestion, thereby degrading overall communication performance. According to various embodiments disclosed in this document, it is possible to provide a data distribution method and an electronic device capable of improving communication performance by detecting congestion of LTE cells and limiting data distribution to LTE cells.

According to various embodiments disclosed in this document, it is possible to provide a data distribution method and electronic device for identifying a congestion state of the second distribution unit and limiting data distribution to the second distribution unit.

According to various embodiments disclosed in this document, a congestion state of the second distribution unit is identified based on a message received from the second distribution unit, and whether or not the congestion state is released in the second distribution unit is confirmed. A data distribution method and electronic device capable of resuming data distribution to the second distribution unit can be provided.

An electronic device according to various embodiments may include a processor, and the processor may distribute and transmit data to a first distribution unit and a second distribution unit that transmit data to a user terminal, identify a congestion state related to a traffic load of the second distribution unit, and control the distribution of the data to the second distribution unit based on the congestion state.

A data distribution method according to various embodiments may include an operation of distributing and transmitting the data to a first distribution unit and a second distribution unit transmitting data to a user terminal, an operation of identifying a congestion state related to a traffic load of the second distribution unit, and an operation of controlling the distribution of the data to the second distribution unit based on the congestion state.

A data distribution method according to various embodiments includes an operation of distributing and transmitting the data to a first distribution unit and a second distribution unit that transmit data to a user terminal, an operation of receiving a message from the second distribution unit in which a set information element has a set value when the second distribution unit is in a congestion state, an operation of identifying the congestion state related to the traffic load of the second distribution unit based on the set information element, and an operation of transmitting the data to the second distribution unit based on the congestion state. It may include an operation to control distribution.

According to various embodiments disclosed in this document, an increase in waiting time and performance deterioration in a terminal due to congestion of a path for transmitting data to a user terminal may be prevented and/or reduced.

According to various embodiments disclosed in this document, in transmitting a dual connectivity split bearer into a first distribution unit and a second distribution unit and transmitting to a user terminal, data distribution is restricted to a path in which congestion occurs. Delay due to reordering can be prevented and / or reduced, the number of reordering can be reduced, and communication performance degradation can be prevented or alleviated.

1 is a diagram illustrating an operation of transmitting data distributed by an electronic device to a user terminal according to various embodiments.

2 is a diagram illustrating an operation of distributing data of an electronic device and an operation of identifying a congestion state of a second distribution unit according to various embodiments.

3 is a diagram illustrating an operation of distributing data by an electronic device according to various embodiments.

4 is a diagram illustrating an operation of limiting data distribution or resuming data distribution to a second distribution unit based on a message received from the second distribution unit by an electronic device according to various embodiments.

5 is a diagram illustrating an operation of determining whether or not a congestion state of a second distribution unit is released for each set period of an electronic device according to various embodiments.

6 is a diagram illustrating an operation of distributing data to a first distribution unit and a second distribution unit by an electronic device according to various embodiments.

7 is a diagram illustrating a format of a message received by an electronic device from a first distribution unit or a second distribution unit according to various embodiments.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. In the description with reference to the accompanying drawings, the same reference numerals are given to the same components regardless of reference numerals, and overlapping descriptions thereof will be omitted.

1 is a diagram illustrating an operation of transmitting data distributed by an electronic device 100 to a user terminal 300 according to various embodiments. The embodiment shown in FIG. 1 is a diagram illustrating an embodiment in which the electronic device 100 transmits downlink data to the user terminal 300 according to a non-stand alone (NSA) method in the EN-DC network.

Referring to FIG. 1 , an electronic device 100 according to various embodiments may include a processor (not shown). For example, the electronic device 100 may distribute input traffic, eg data, to the first distributed unit 200 - 1 (DU) and the second distributed unit 200 - 2 using a processor and transmit the same. For example, the electronic device 100 may transmit data to the user terminal 300 through the first distribution unit 200-1 and the second distribution unit 200-2 in the EN-DC network. For example, the electronic device 100 distributes traffic, for example, a bearer, to the first distribution unit 200-1 and the second distribution unit 200-2, and transmits data to the first distribution unit 200-1 and the second distribution unit 200-2.

As an example, the electronic device 100 may include an interface (not shown) supporting one or more designated protocols that may be used to directly or wirelessly connect to an external electronic device (eg, the first distribution unit 200-1 and the second distribution unit 200-2). As an example, the electronic device 100 may include a communication module (not shown) capable of supporting establishment of a direct communication channel or wireless communication channel between external electronic devices (eg, the first distribution unit 200-1 and the second distribution unit 200-2), and communication through the established communication channel.

For example, the electronic device 100 may transmit distributed data packets and messages to the first distribution unit 200-1 and the second distribution unit 200-2, respectively. For example, a path for transmitting packets and messages from the electronic device 100 to the first distribution unit 200-1 may represent a first path, and a path for transmitting packets and messages from the electronic device 100 to the second distribution unit 200-2 may represent a second path.

For example, the electronic device 100 may transmit packets and messages to the first distribution unit 200-1 through a first path and transmit packets and messages to the second distribution unit 200-2 through a second path. For example, messages transmitted by the electronic device 100 to the first distribution unit 200-1 and the second distribution unit 200-2 may be messages in a DL user data (DUD) format according to the 3GPP standard.

According to various embodiments, in the EN-DC network, the first distributed unit 200-1 may be included in a communication device of a base station (eNodeB, eNB) of an NR cell, and the second distributed unit 200-2 may be included in a communication device of a base station (gNodeB, gNB) of an LTE cell. For example, the electronic device 100 may distribute and transmit secondary cell group (SCG) split bearers to the first distribution unit 200-1 and the second distribution unit 200-2. As an example, the electronic device 100 may be a centralized unit (CU) of an NR cell base station.

For example, when the electronic device 100 transmits downlink data to the user terminal 300 according to a stand alone (SA) method in the EN-DC network, data, for example, an SCG bearer, may be transmitted as a packet to the first distribution unit 200-1, and the first distribution unit 200-1 may transmit data to the user terminal 300.

In FIG. 1 and the following FIGS. 2 to 6, the electronic device 100 and the first distribution unit 200-1 are included in the communication device of the base station of the NR cell, and the second distribution unit 200-2 is described as an embodiment included in the communication device of the base station of the LTE cell, but is not limited thereto.

For example, the first distribution unit 200-1 and the electronic device 100 may be included in a communication device of a base station of an LTE cell, and the second distribution unit 200-2 may be included in a communication device of a base station of an NR cell. For example, the electronic device 100 may distribute and transmit the MCG split bearer to the first distribution unit 200-1 and the second distribution unit 200-2.

The first distribution unit 200-1 and the second distribution unit 200-2 according to various embodiments may process packets received from the electronic device 100 and transmit the packets to the user terminal 300. For example, each of the first distribution unit 200-1 and the second distribution unit 200-2 may include a protocol layer for processing packets.

For example, the first distribution unit 200-1 may include a protocol layer according to the NR communication method in order to transmit downlink data to the user terminal 300 according to the NR communication method. The first distribution unit 200 - 1 may transmit the packet processed using the protocol layer to the user terminal 300 .

For example, the second distribution unit 200-2 may include a protocol layer according to the LTE communication scheme in order to transmit downlink data to the user terminal 300 according to the LTE communication scheme. The first distribution unit 200 - 1 may transmit the packet processed using the protocol layer to the user terminal 300 .

For example, the first distribution unit 200-1 and the second distribution unit 200-2 may transmit a message to the electronic device 100. For example, the messages transmitted to the electronic device 100 by the first distribution unit 200-1 and the second distribution unit 200-2 may be messages in a DL data delivery status (DDDS) format according to the 3GPP standard.

2 is a diagram illustrating an operation of distributing data of an electronic device (eg, the electronic device 100 of FIG. 1 ) and an operation of identifying a congestion state of a second distribution unit (eg, the second distribution unit 200-2 of FIG. 1 ) according to various embodiments.

2 is a diagram showing an embodiment in which an electronic device 100 and a first distribution unit (eg, the first distribution unit 200-1 of FIG. 1) are included in the first communication device 10, and the second distribution unit 200-2 is included in the second communication device 20, among various embodiments. In FIG. 2 , the first communication device 10 may include a communication device of an NR base station, and the second communication device 20 may include a communication device of an LTE base station. For example, the first communication device 10 may be referred to as a transmission node, an NR cell, or a gNB, and the second communication device 20 may be referred to as a reception node, an LTE cell, or an eNB.

Referring to FIG. 2 , the electronic device 100 may include a protocol stack for distributing traffic, eg, an SCG split bearer, to a first distribution unit 200-1 and a second distribution unit 200-2. As an example, the electronic device 100 may include a packet data convergence protocol (PDCP) layer 110 . For example, the PDCP layer 110 of the electronic device 100 may distribute data, eg, SCG split bearer, to the first distribution unit 200-1 and the second distribution unit 200-2. The PDCP layer 110 of the electronic device 100 may route PDCP packet data units (PDUs) output from the PDCP layer 110 to the first distribution unit 200-1 and the second distribution unit 200-2.

For example, the PDCP layer 110 of the electronic device 100 assigns sequential numbers to packets of data distributed to the first distribution unit 200-1 and the second distribution unit 200-2. Can be numbered. The electronic device 100 may transmit serial numbered packets in the PDCP layer 110, for example, PDCP PDUs to the first distribution unit 200-1 and the second distribution unit 200-2, respectively.

As an example, the PDCP layer 110 of the electronic device 100 may assign a serial number to a packet using a message transmitted to the RLC layer 210-1 of the first distribution unit 200-1 and the RLC layer 210-2 of the second distribution unit 200-2. For example, the message transmitted from the PDCP layer 110 of the electronic device 100 to the RLC layer 210-1 of the first distribution unit 200-1 and the RLC layer 210-2 of the second distribution unit 200-2 may be a message according to the DUD format. For example, a message according to the DUD format may include a sequence number, for example, an NR-U sequence number (SN).

For example, the first distribution unit 200-1 and the second distribution unit 200-2 may process packets received from the electronic device 100 using a protocol stack, and transmit the processed packets to the user terminal 300.

For example, the protocol stacks of the first distribution unit 200-1 and the second distribution unit 200-2 may include radio link control (RLC) layers 210-1 and 210-2, and media access control (MAC) layers 220-1 and 220-2, and PHY layers 230-1 and 230-2, respectively. As an example, the protocol stack of the first distribution unit 200-1 may be a protocol stack for transmitting and receiving data with the user terminal 300 according to the NR communication scheme, and the protocol stack of the second distribution unit 200-2 may be a protocol stack for transmitting and receiving data with the user terminal 300 according to the LTE communication scheme.

For example, the RLC layer 210-1, the MAC layer 220-1, and the PHY layer 230-1 of the first distribution unit 200-1 process packets by performing prescribed operations according to the NR communication scheme, and the RLC layer 210-2, MAC layer 220-2, and PHY layer 230-2 of the second distribution unit 200-2 perform prescribed operations according to the LTE communication scheme to process packets. can be dealt with

For example, the electronic device 100 may identify a congestion state related to the traffic load of the second distribution unit 200-2. For example, the congestion state may be a state in which the traffic load of the second distribution unit 200-2 exceeds the maximum transmittable traffic load of the second distribution unit 200-2. For example, the congestion state may be a state in which traffic required to be transmitted to a plurality of user terminals 300 connected to the cell exceeds the maximum transmission capacity of the cell. For example, the congestion state may mean a state in which the amount of data requested from the plurality of user terminals 300 communicatively connected to the second distribution unit 200-2 exceeds the amount of data that the second distribution unit 200-2 can transmit.

For example, the second distribution unit 200-2 may determine a congestion state. For example, the second distribution unit 200-2 may determine whether or not the second distribution unit 200-2 is in a congested state based on the number and state of the plurality of user terminals 300 connected in communication with the second distribution unit 200-2. For example, the second distribution unit 200-2 may determine whether the second distribution unit 200-2 is in a congested state based on the number of user terminals (active UEs) in an active state among user terminals communicatively connected to the second distribution unit 200-2.

For example, a user terminal communicatively connected to the second distribution unit 200-2 may include a user terminal (eg, the user terminal 300 of FIG. 1) that is simultaneously communicatively connected to the first distribution unit 200-1 and the second distribution unit 200-2, and a user terminal (not shown) that is communicatively connected only to the second distribution unit 200-2. The second distribution unit 200-2 may determine whether the second distribution unit 200-2 is congested based on the number of user terminals (active UEs) in an active state, excluding user terminals in an idle state, among user terminals communicatively connected to the second distribution unit 200-2.

For example, the second distribution unit 200-2 compares the number of user terminals in an active state connected to the second distribution unit 200-2 with a predetermined threshold value, and if the number of user terminals in an active state is equal to or greater than the threshold value, it may be determined that the second distribution unit 200-2 is in a congested state. For example, the threshold value may be determined based on an amount of data required for communication of a user terminal in an active state and a maximum data transmission amount of the second distribution unit 200 - 2 .

For example, the second distribution unit 200-2 may determine whether the second distribution unit 200-2 is in a congested state by using the amount of bearers that occupy radio resources of the second distribution unit 200-2 for a predetermined time t based on the maximum transmission capacity of the second distribution unit 200-2.

For example, the electronic device 100 may identify whether the second distribution unit 200-2 is congested based on the message received from the second distribution unit 200-2. The electronic device 100 may receive a message according to the DDDS format from the second distribution unit 200-2. A message according to the DDDS format may include various information elements. The information elements may include information about data transmission from the electronic device 100 to the second distribution unit 200-2. For example, a message according to the DDDS format may include information elements related to data transmission, such as 'Desired buffer size for the data radio bearer', 'Desired data rate', and 'Number of lost NR-U sequence number range reported'.

For example, the electronic device 100 may set an information element for indicating a congestion state among information elements. For example, in a message according to the DDDS format, 'Cause value' may indicate a parameter for indicating an event that has occurred in a corresponding node. In the 3rd generation partnership project (3GPP) specification, 'Cause Value' can have a value of 0 to 255, values 7 to 228 are reserved for future value extensions, and values 229 to 255 are reserved for test purposes.

For example, the electronic device 100 may set one of a value reserved for future expansion or a value reserved for test purposes as a value for indicating a congestion state. For example, when the second distribution unit 200-2 determines that the second distribution unit 200-2 is congested, a message having a 'Cause value' of 241, which is an information element of the DDDS format, can be transmitted to the electronic device 100. The electronic device 100 may determine that the second distribution unit 200-2 is in a congested state when the value of 'Cause value', which is an information element of the message received from the second distribution unit 200-2, is 241. In the above example, 'Cause value' may indicate an information element set to indicate a congestion state, and 241, a value of 'Cause value', may indicate a value set to indicate a congestion state.

In the above example, the electronic device 100 has been described as the case where the value of the information element (eg, 'cause value') of the message received from the second distribution unit 200-2 is 241, but is not limited to the above example. For example, the electronic device 100 may define at least one of values of an information element including a parameter definable by a user among information elements of a message received from the second distribution unit 200-2 as a congested state. Based on the message received from the second distribution unit 200-2, the electronic device 100 determines that the second distribution unit 200-2 is in a congestion state when the value of the information element defined as representing the congestion state has a set value.

For example, the electronic device 100 may communicate with the second distribution unit 200-2 using the X2-U interface. The X2-U interface may be used for communication between an eNB, eg, a base station of an LTE cell, and a gNB, eg, a base station of an NR cell, in the NSA scheme.

For example, the electronic device may control data distribution to the second distribution unit. When the second distribution unit is in a congested state, the electronic device may limit data distribution to the second distribution unit. When the second distribution unit is congested, the electronic device may transmit data to the first distribution unit. By limiting data distribution to the congested second distribution unit, the electronic device can prevent and/or reduce data transmission delay due to the congestion of the second distribution unit. By preventing and/or reducing data transmission delay due to congestion of the second distribution unit, the electronic device can prevent and/or reduce packet reordering timeout according to a data retransmission request from the user terminal.

2, the PDCP layer 110 included in the second communication device 20 transmits a packet to the second distribution unit 200-2 using data, for example, an MCG bearer, and the second distribution unit 200-2 may transmit the transmitted packet to the user terminal 300.

In FIG. 2, the protocol stack of the electronic device 100, the first distributed unit 200-1 and the second distributed unit 200-2, such as the PDCP layer 110, the RLC layer 210-1, 210-2, the Mac layer 220-1, 220-2, and the PHY layer 230-1, 230-2 Even if it is not, the known technical contents can be applied.

For example, the PDCP layer 110 of the electronic device 100 may perform operations such as ciphering and deciphering, header compression and decompression in a user plane, or PDCP PDU duplication in a control plane.

In FIG. 2 , the electronic device 100, the first distribution unit 200-1, and the second distribution unit 200-2 may include protocol stacks not shown as protocol stacks. For example, the electronic device 100 may further include at least one of 5G layer 3, eg, a radio resource control (RRC) layer and a non access stratum (NAS) layer, or a service data adaptation protocol (SDPA) layer.

3 is a diagram illustrating an operation of distributing data by an electronic device (eg, the electronic device 100 of FIG. 1 ) according to various embodiments.

Referring to FIG. 3 , in operation 310, the electronic device 100 according to various embodiments may distribute and transmit data to a first distribution unit (eg, the first distribution unit 200-1 of FIG. 1 ) and a second distribution unit (eg, the second distribution unit 200-2 of FIG. 1 ). For example, the PDCP layer (eg, the PDCP layer 110 of FIG. 2 ) of the electronic device 100 may distribute SCG split bearers to the first distribution unit 200-1 and the second distribution unit 200-2.

For example, the electronic device 100 may identify a congestion state of the second distribution unit 200-2 in operation 320. As an example, the second distribution unit 200-2 may determine whether the second distribution unit 200-2 is congested based on the number and state of user terminals (e.g., the user terminal 300 of FIG. 1) connected in communication with the second distribution unit 200-2. For example, when the number of active user terminals connected to the second distribution unit 200-2 is greater than or equal to a set threshold value, the second distribution unit 200-2 may determine that the second distribution unit 200-2 is congested.

For example, the electronic device 100 may identify a congestion state of the second distribution unit 200-2 based on the message received from the second distribution unit 200-2. For example, the electronic device 100 may receive a message according to the DDDS format from the second distribution unit 200-2.

For example, the electronic device 100 may define at least one of values of a user-definable information element among a plurality of information elements included in a message according to the DDDS format as indicating a congestion state. When the second distribution unit 200-2 is in a congested state, the second distribution unit 200-2 may transmit a message to the electronic device 100 in which the value of the set information element is set to a value indicating the congestion state.

For example, the electronic device 100 may define that a corresponding distribution unit indicates a congestion state when the value of the information element 'Cause value' of the message according to the DDDS format is '241'. When the second distribution unit 200-2 is in a congested state, the second distribution unit 200-2 may transmit a message in which the information element 'Cause value' has a value of '241' to the electronic device 100. Based on the message received from the second distribution unit 200-2, the electronic device 100 may identify that the second distribution unit 200-2 is in a congested state when the value of the information element 'Cause value' is '241'.

For example, the electronic device 100 may limit data distribution to the second distribution unit 200-2 based on the congestion state in operation 330. For example, the electronic device 100 may limit data distribution to the second distribution unit 200-2 when the second distribution unit 200-2 is congested. For example, in the PDCP layer 110 of the electronic device 100, the SCG split bearer may be transmitted only to the first distribution unit 200-1, and data distribution may be limited to the second distribution unit 200-2.

4 is a diagram illustrating an operation of limiting data distribution to the second distribution unit 200-2 or resuming data distribution based on a message received by an electronic device (eg, the electronic device 100 of FIG. 1) from a second distribution unit (eg, the second distribution unit 200-2 of FIG. 1) according to various embodiments.

Referring to FIG. 4 , the electronic device 100 according to various embodiments may distribute and transmit data to a first distribution unit (eg, the first distribution unit 200-1 of FIG. 1 ) and the second distribution unit 200-2 in operation 410. Regarding operation 410, the description of operation 310 of FIG. 3 may be substantially equally applied.

For example, the electronic device 100 may receive a message from the second distribution unit 200-2 in operation 420. As an example, the message may be a message according to the DDDS format. For example, a message may include a plurality of information elements related to data transmission.

For example, in the message, when the second distribution unit 200-2 is in a congested state, a set information element among information elements of the message may have a set value. For example, a set information element among information elements according to the DDDS format may be 'Cause Value'. When the second distribution unit 200-2 is in a congested state, the value of the set information element 'Cause value' may be the set value '241'.

For example, the electronic device 100 may identify a congestion state based on the set information element and set value in operation 430 . For example, in operation 430, the electronic device 100 may determine whether a set information element included in the message has a set value. In the above example, when the value of the information element 'Cause value' included in the message is '241', the electronic device 100 may determine that the second distribution unit 200-2 is in a congested state.

For example, the electronic device 100 may limit data distribution to the second distribution unit 200-2 in operation 440. Regarding operation 440, the description of operation 330 of FIG. 3 may be substantially equally applied.

For example, the electronic device 100 may determine whether the congestion state of the second distribution unit 200-2 is released in operation 450. When the second distribution unit 200-2 continues to be congested, the electronic device 100 may limit data distribution to the second distribution unit 200-2 in operation 440. For example, the electronic device 100 may periodically identify the congestion state of the second distribution unit 200 - 2 according to a polling method. A period for identifying the congestion state of the second distribution unit 200-2 may be variously determined according to settings.

For example, the electronic device 100 may transmit a message to the second distribution unit 200-2 at each set period. The electronic device 100 may receive a message from the second distribution unit 200-2 in response to the transmitted message, and determine whether the congestion state of the second distribution unit 200-2 is released based on the received message.

For example, the electronic device 100 may transmit a message for checking whether the second distribution unit 200-2 is in a congested state to the second distribution unit 200-2 at set intervals. The second distribution unit 200 - 2 may transmit a message including whether the second distribution unit 200 - 2 is congested to the electronic device 100 in response to the message received from the electronic device 100 .

As another example, the second distribution unit 200-2 may identify a change in congestion state. The second distribution unit 200-2 may transmit a message to the electronic device 100 when the congestion state of the second distribution unit 200-2 is released. The electronic device 100 may identify that the congestion state of the second distribution unit 200-2 is released based on the message received from the second distribution unit 200-2.

For example, if it is determined in operation 450 that the second distribution unit 200-2 is not congested, the electronic device 100 may resume data distribution to the second distribution unit 200-2 in operation 460.

5 is a diagram illustrating an operation of determining whether an electronic device (e.g., the electronic device 100 of FIG. 1) according to various embodiments is released from a congestion state of a second dispersion unit (e.g., the second dispersion unit 200-2 of FIG. 1) for each set period.

For example, the electronic device 100 may transmit a message to the second distribution unit 200-2 in operation 510. For example, the electronic device 100 may transmit a message in a DUD format to the second distribution unit 200-2. For example, the electronic device 100 may transmit a message in which the value of the information element 'Report polling' is 1 in the DUD format message to the second distribution unit 200-2. The information element 'Report polling' may indicate a parameter requesting transmission of a downlink data delivery status, for example, a DDDS message to the electronic device 100 (eg, the PDCP layer 110 of the electronic device 100). For example, when the value of 'Report polling' is 0, it may indicate not requesting a DDDS message or a status (downlink data delivery status report not requested), and when the value of 'Report polling' is 1, requesting a DDDS message or status (downlink data delivery status report requested).

For example, in operation 520, a congestion state may be determined in the second distribution unit 200-2. For example, in operation 520, the second distribution unit 200-2 may compare the number of user terminals (active UEs) in an active state that have communicated with the second distribution unit 200-2 with a set threshold. The second distribution unit 200-2 may determine that the second distribution unit 200-2 is congested when the number of active user terminals is greater than or equal to a set threshold.

For example, the electronic device 100 may receive a message from the second distribution unit 200-2 in operation 530. For example, when the second distribution unit 200 - 2 is in a congested state, a set information element of a message received by the electronic device 100 in operation 530 may have a set value. For example, when the second distribution unit 200 - 2 is not congested, the set information element of the message received by the electronic device 100 in operation 530 may have a value different from the set value.

For example, the message received by the electronic device 100 from the second distribution unit 200-2 in operation 530 may be understood as substantially the same as the message received from the second distribution unit 200-2 in operation 420 of FIG. 4 .

For example, the electronic device 100 may determine whether the value of the information element set in operation 540 is the set value. The electronic device 100 may compare the value of the information element set in operation 540 with the set value to determine whether the congestion state of the second distribution unit 200-2 is released. When the value of the information element set in operation 540 is not the set value, for example, when the second distribution unit 200-2 is not congested, the electronic device 100 may resume data distribution to the second distribution unit 200-2 in operation 460.

When the value of the information element set in operation 540 is the set value, for example, when the second distribution unit 200 - 2 is in a congested state, the electronic device 100 may determine whether the set period has elapsed in operation 550 . When the set period elapses, the electronic device 100 may transmit a message to the second distribution unit 200-2 in operation 510.

With respect to

operations

540 and 550 described above, descriptions of

operations

420 and 430 of FIG. 4 may be substantially equally applied.

According to the operations shown in FIG. 5, the electronic device 100 transmits a message, for example, a DUD message, to the second distribution unit 200-2 at set intervals, and in response to the transmitted message, based on a message received from the second distribution unit 200-2, for example, a DDDS message, it is possible to identify whether or not the congestion state of the second distribution unit 200-2 is released. When the congestion state of the second distribution unit 200-2 is released, the electronic device 100 may resume data distribution to the second distribution unit 200-2.

6 is a diagram illustrating an operation of distributing data to a first distribution unit (eg, the first distribution unit 200-1 of FIG. 1 ) and a second distribution unit (eg, the first distribution unit 200-2 of FIG. 1 ) by an electronic device (eg, the electronic device 100 of FIG. 1 ) according to various embodiments.

Referring to FIG. 6 , the electronic device 100 according to various embodiments may distribute and transmit data to the first distribution unit 200-1 and the second distribution unit 200-2 in operations 610-1 and 610-2.

For example, the electronic device 100 may receive a message from the first distribution unit 200-1 in operation 620-1 and receive a message from the second distribution unit 200-2 in operation 620-2. The electronic device 100 may receive a message according to the DDDS format in operations 620-1 and 620-2. Messages received by the electronic device 100 from the first distribution unit 200-1 and the second distribution unit 200-2 may include a value indicating whether the first distribution unit 200-1 and the second distribution unit 200-2 are congested. For example, in FIG. 6 , messages received by the electronic device 100 from the first distribution unit 200-1 and the second distribution unit 200-2 may include a value of congestion.

In FIG. 6, a congestion value of 0 may indicate that the corresponding distributed unit is not in a congested state, and a congestion value of 1 may indicate that the corresponding distributed unit is in a congested state.

As another example, a congestion value of 0 representing a congestion state shown in FIG. 6 may indicate a case in which an information element set for a congestion state in a DDDS message is not a set value. The fact that the value of congestion shown in FIG. 6 is 1 may indicate a case where an information element configured for a congestion state in the DDDS message is a configured value.

For example, when the first distribution unit 200-1 or the second distribution unit 200-2 is in a congested state, it may be set to transmit a message in which the value of the information element 'Cause value' of the DDDS message is '241'. In FIG. 6 , a message with a congestion value of 0 can be understood as substantially the same as a message in which the set information element 'Cause value' has a value other than '241'. In FIG. 6, a message with a congestion value of 1 can be understood as substantially the same as a message with a set information element 'Cause value' value of '241'.

For example, the electronic device 100 may limit data distribution to the second distribution unit 200-2 based on the congestion state of the second distribution unit 200-2. The electronic device 100 may distribute and transmit data to the first distribution unit 200-1 in operation 630-1, and limit data distribution to the second distribution unit 200-2 in operation 630-2.

For example, the electronic device 100 may determine whether the second distribution unit 200-2 is congested by transmitting a message to the second distribution unit 200-2 at each set period.

For example, the electronic device 100 may transmit a message to the second distribution unit 200-2 in operation 640-1. The message transmitted by the electronic device 100 in operation 640-1 may indicate a message for checking whether the second distribution unit 200-2 is congested.

For example, the second distribution unit 200-2 may determine whether the second distribution unit 200-2 is congested in operation 650-1. For example, the second distribution unit 200-2 compares the number of active user terminals connected to the second distribution unit 200-2 with a set threshold, and determines whether the second distribution unit 200-2 is in a congested state.

For example, the electronic device 100 may receive a message from the second distribution unit 200-2 in operation 660-1. The message received in operation 660-1 may be understood as substantially the same as the message received in operation 620-2.

The electronic device 100 may transmit a message to the second distribution unit 200-2 at each set period. For example, the electronic device 100 may transmit a message to the second distribution unit 200-2 at intervals set as in operations 640-1, ..., 640-n.

The second distribution unit 200-2 may determine the congestion state of the second distribution unit 200-2 for each set period and transmit a message to the electronic device 100. For example, the second distribution unit 200-2 may determine the congestion state of the second distribution unit 200-2 at intervals set as in operations 650-1, ..., 650-n. The second distribution unit 200-2 may transmit a message to the electronic device 100 at intervals set as in operations 660-1, ..., 660-n.

The electronic device 100 may identify whether the second distribution unit 200-2 is congested using the messages received in operations 650-1, ..., 650-n. The electronic device 100 may identify that the congestion state of the second distribution unit 200-2 is released, based on the message received in operation 650-n with a congestion of 0.

For example, when the congestion state of the second distribution unit 200-2 is released, the electronic device 100 may resume data distribution to the second distribution unit 200-2. In FIG. 6 , when the value of congestion included in the message of operation 660-n is 0, it may indicate that the congestion state of the second distribution unit 200-2 is released. The electronic device 100 may distribute and transmit data to the first distribution unit 200-1 in operation 670-1, and distribute and transmit data to the second distribution unit 200-2 in operation 670-2. When the congestion state of the second distribution unit 200-2 is released as in operation 670-2, the electronic device 100 may resume data distribution.

7 is a diagram illustrating a format of a message received by an electronic device (eg, the electronic device 100 of FIG. 1 ) from a first distribution unit (eg, the first distribution unit 200-1 of FIG. 1 ) or a second distribution unit (eg, the second distribution unit 200-2 of FIG. 1 ) according to various embodiments.

The format of the message shown in FIG. 7 may include the format of a DDDS message. In FIG. 7 , the DDDS message may include various information elements. For example, the information element may include 'PDU type', 'Cause Report', and 'Desired buffer size for the data radio bearer' shown in FIG. 7 .

For example, when the value of the set information element is the set value, the electronic device 100 may determine that the distribution unit that has transmitted the message is in a congested state. For example, the information element 'Cause value' may indicate a parameter indicating an event of a corresponding node and may have a value ranging from 0 to 3 octets. According to the 3GPP standard, the value of the information element 'Cause value' indicates UNKNOWN when 0, RADIO LINK OUTAGE when 1, RADIO LINK RESUME when 2, UL RADIO LINK OUTAGE when 3, DL RADIO LINK OUTAGE when 4, UL RADIO LINK RESUME when 5, and DL RADIO LINK RESUME when 6, and from 7 to 228 Up to are reserved for future value extensions, and values from 229 to 255 are reserved for test purposes.

For example, the electronic device 100 may set an information element for indicating a congestion state to 'Cause value', and in case of congestion, the value of the set information element 'Cause value' may be set to '241'. In the DDDS message received by the electronic device 100 from the first distribution unit 200-1 or the second distribution unit 200-2, when the value of 'Cause value' is '241', it can be determined that the corresponding distribution unit is in a congested state. The above set information elements and/or set values are examples, and are not limited to the above examples.

An electronic device (eg, the electronic device 100 of FIG. 1 ) according to various embodiments includes a processor, and the processor distributes and transmits the data to a first distribution unit (eg, the first distribution unit 200-1 of FIG. 1 ) and a second distribution unit (eg, the second distribution unit 200-2 of FIG. 1 ) that transmits data to the user terminal 300, and causes congestion related to the traffic load of the second distribution unit 200-2. A state may be identified, and distribution of the data to the second distribution unit 200-2 may be controlled based on the congestion state.

The processor may identify the congestion state based on the message received from the second distribution unit 200-2.

In the message, when the second distribution unit 200-2 is in the congested state, a set information element among information elements of the message has a set value, and the processor may identify the congestion state based on the set information element and the set value.

The congestion state may be determined based on the number and state of the plurality of user terminals 300 connected to the second distribution unit 200-2 in communication.

The processor determines whether the congestion state of the second distribution unit 200-2 is released, and when the congestion state of the second distribution unit 200-2 is released, the second distribution unit 200-2. The distribution of the data may be resumed.

The processor transmits a message to the second distribution unit 200-2 at set intervals, and based on a message received from the second distribution unit 200-2 in response to the message, the second distribution unit 200-2 may determine whether or not the congestion state is present.

A data distribution method according to various embodiments may include an operation of distributing and transmitting the data to the first distribution unit 200-1 and the second distribution unit 200-2 that transmit data to the user terminal 300, an operation of identifying a congestion state related to a traffic load of the second distribution unit 200-2, and an operation of controlling the distribution of the data to the second distribution unit 200-2 based on the congestion state.

The operation of identifying the congestion state may identify the congestion state based on the message received from the second distribution unit 200-2.

In the message, when the second distribution unit 200-2 is in the congested state, a set information element among information elements of the message has a set value, and the operation of identifying the congestion state may identify the congestion state based on the set value.

The data distribution method may further include an operation of determining whether the congestion state of the second distribution unit 200-2 is released, and an operation of resuming distribution of the data to the second distribution unit 200-2 when the congestion state of the second distribution unit 200-2 is released.

In the operation of determining whether the congestion state is released, a message is transmitted to the second distribution unit 200-2 every set period, and the second distribution unit 200-2 responds to the message. Based on a message received from the second distribution unit 200-2, it may be determined whether the second distribution unit 200-2 is in the congestion state.

A data distribution method according to various embodiments includes an operation of distributing and transmitting the data to a first distribution unit 200-1 and a second distribution unit 200-2 that transmit data to a user terminal 300, an operation of receiving a message having a set value of a set information element among information elements when the second distribution unit 200-2 is in a congestion state, and based on the set information element, An operation of identifying the congestion state related to the traffic load of the second distribution unit 200-2 and an operation of controlling distribution of the data to the second distribution unit 200-2 based on the congestion state.

Various embodiments of this document and terms used therein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, like reference numbers may be used for like or related elements. The singular form of a noun corresponding to an item may include one item or a plurality of items, unless the relevant context clearly dictates otherwise. In this document, each of the phrases such as "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "at least one of A, B, or C" may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof. Terms such as "first", "second", or "first" or "secondary" may be used simply to distinguish a corresponding component from other corresponding components, and do not limit the corresponding components in other respects (e.g., importance or order). When a (e.g., a first) component is referred to as “coupled” or “connected” to another (e.g., a second) component, with or without the terms “functionally” or “communicatively,” it means that the component may be connected to the other component directly (e.g., by wire), wirelessly, or through a third component.

The term "module" used in various embodiments of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as, for example, logic, logical block, component, or circuit. A module may be an integrally constructed component or a minimal unit of components or a portion thereof that performs one or more functions. For example, according to one embodiment, the module may be implemented in the form of an application-specific integrated circuit (ASIC).

Various embodiments of this document include one or more instructions stored in a storage medium (eg, internal memory or external memory) readable by a machine (eg, the electronic device 100). Can be implemented as software (eg, a program). For example, a processor (eg, the processor 120 ) of a device (eg, the electronic device 100 ) may call at least one command among one or more instructions stored from a storage medium and execute it. This enables the device to be operated to perform at least one function according to the at least one command invoked. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-temporary' only means that the storage medium is a tangible device and does not contain a signal (e.g., electromagnetic wave), and this term does not distinguish between the case where data is semi-permanently stored in the storage medium and the case where it is temporarily stored.

According to one embodiment, the method according to various embodiments disclosed in this document may be included and provided in a computer program product. Computer program products may be traded between sellers and buyers as commodities. A computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read only memory (CD-ROM)), or distributed (e.g., downloaded or uploaded) online, through an application store (e.g., Play Store™) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least part of the computer program product may be temporarily stored or temporarily created in a device-readable storage medium such as a manufacturer's server, an application store server, or a relay server's memory.

According to various embodiments, each component (eg, module or program) of the components described above may include a single object or a plurality of entities, and some of the plurality of entities may be separately disposed in other components. According to various embodiments, one or more components or operations among the aforementioned corresponding components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (eg modules or programs) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by a corresponding component of the plurality of components prior to the integration. According to various embodiments, the actions performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the actions may be executed in a different order, may be omitted, or one or more other actions may be added.

Claims

In electronic devices,

processor

including,

the processor,

Distributing and transmitting the data to a first distribution unit and a second distribution unit for transmitting data to a user terminal;

identify a congestion condition related to the traffic load of the second distribution unit;

and controlling distribution of the data to the second distribution unit based on the congestion state.
According to claim 1,

the processor,

and identifying the congestion state based on the message received from the second distribution unit.
According to claim 2,

The message is

When the second distribution unit is in the congestion state, a set information element among information elements of the message has a set value;

the processor,

and identifying the congestion state based on the set information element and the set value.
According to claim 1,

The congestion state is

The electronic device determined based on the number and status of a plurality of user terminals communicatively connected to the second distribution unit.
According to claim 1,

the processor,

determining whether the congestion state of the second distribution unit is released;

When the congestion state of the second distribution unit is released, the distribution of the data to the second distribution unit is resumed.
According to claim 5,

the processor,

An electronic device that transmits a message to the second distribution unit at set intervals and determines whether the second distribution unit is in the congestion state based on a message received from the second distribution unit in response to the message.
distributing and transmitting the data to a first distribution unit and a second distribution unit that transmit data to a user terminal;

identifying a congestion condition related to the traffic load of the second distribution unit; and

Controlling distribution of the data to the second distribution unit based on the congestion state

Including, data distribution method.
According to claim 7,

The operation of identifying the congestion state,

and identifying the congestion state based on a message received from the second distribution unit.
According to claim 8,

The message is

When the second distribution unit is in the congestion state, a set information element among information elements of the message has a set value;

The operation of identifying the congestion state,

and identifying the congestion state based on the set value.
According to claim 7,

The congestion state is

Data distribution method, which is determined based on the number and status of a plurality of user terminals communicatively connected with the second distribution unit.
According to claim 7,

determining whether the congestion state of the second distribution unit is released; and

When the congestion state of the second distribution unit is released, resuming distribution of the data to the second distribution unit.

Further comprising a data distribution method.
According to claim 11,

The operation of determining whether the congestion state is released,

A data distribution method for transmitting a message to the second distribution unit at set intervals and determining whether the second distribution unit is in the congestion state based on a message received from the second distribution unit in response to the message.