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WO2016090607A1 - Terminal de liaison terrestre, station de base et procédé de commande de flux pour un réseau sans fil - Google Patents

Terminal de liaison terrestre, station de base et procédé de commande de flux pour un réseau sans fil Download PDF

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Publication number
WO2016090607A1
WO2016090607A1 PCT/CN2014/093604 CN2014093604W WO2016090607A1 WO 2016090607 A1 WO2016090607 A1 WO 2016090607A1 CN 2014093604 W CN2014093604 W CN 2014093604W WO 2016090607 A1 WO2016090607 A1 WO 2016090607A1
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WO
WIPO (PCT)
Prior art keywords
olc
processor
information
tbs
backhaul terminal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2014/093604
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English (en)
Chinese (zh)
Inventor
钟毅
吴爱明
易甫
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN201480034867.7A priority Critical patent/CN105493560B/zh
Priority to PCT/CN2014/093604 priority patent/WO2016090607A1/fr
Publication of WO2016090607A1 publication Critical patent/WO2016090607A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/10—Flow control between communication endpoints

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a backhaul terminal, a base station, and a wireless network flow control method.
  • a wireless backhaul system is composed of a base station (BS) and a terminal, which is also called a user equipment (UE), and performs data transmission with an air interface through the air interface.
  • BS base station
  • UE user equipment
  • the terminal used for backhaul in the wireless backhaul system may be referred to as a backhaul terminal.
  • the backhaul terminal is also a kind of terminal, which complies with the same protocol requirements as the ordinary terminal.
  • the BS determines the downlink resource block (Resource Block, which is allocated to the terminal, according to the amount of data in the radio link control (RLC) buffer of the downlink data, in combination with the downlink channel quality, and the scheduling terminal.
  • RLC radio link control
  • RB number, transport block size index (TBS Index), and the modulation method used. Since the backhaul terminal and the ordinary terminal follow the same protocol requirements, the BS schedules the backhaul terminal without knowing the processing capability of the backhaul terminal, and the processing capability of the backhaul terminal is limited, and the BS does not know. In the case of returning the terminal processing capability, the backhaul terminal will be sent data that exceeds its processing capability, and the backhaul terminal will not be overloaded.
  • RLC radio link control
  • the overloaded traffic control mode is performed according to the QoS priority, but the backhaul terminal itself does not have the mechanism of performing traffic control according to Qos, and therefore, when it receives When the data exceeds its own processing capability, the packet loss occurs outside the wireless backhaul system. It is a packet that is not processed according to the QoS priority, and the downlink does not comply with the Qos traffic control policy.
  • the backhaul terminal accesses the BS
  • the theoretical capability of the backhaul terminal is reported, so that the BS transmits the data transmitted to the backhaul terminal in consideration of the capability of the backhaul terminal when performing scheduling. Will not exceed its ability to avoid packet loss.
  • the study found that under this type of processing, there are still packets that do not meet the Qos requirements.
  • the embodiments of the present invention provide a backhaul terminal, a base station, and a wireless network flow control method to solve the problem of packet loss in the prior art that does not meet the Qos requirement.
  • an embodiment of the present invention provides a backhaul terminal.
  • the backhaul terminal is used in a wireless backhaul system, and the wireless backhaul system includes the backhaul terminal and a base station, and the backhaul terminal and the base station transmit data through an air interface.
  • the backhaul terminal includes:
  • the OLC TBS information is an OLC TBS or an OLC TBS index OTI for indicating the OLC TBS.
  • the backhaul terminal further includes: a storage unit, configured to store the OLC TBS information and the processing Correspondence table of the processor capability of the processor; the generating unit is configured to search for OLC TBS information corresponding to the current processing capability of the processor in the correspondence table, and generate OLC information including the OLC TBS.
  • the processor capability of the processor is divided into multiple restriction levels And each restriction level corresponds to one OLC TBS, wherein the higher the restriction level, the lower the processing capability of the processor, and the smaller the corresponding OLC TBS.
  • the determining unit is configured to periodically determine a current processing capability of the processor.
  • the determining unit determines that the current processing capability corresponding to the processor increases the restriction level
  • the generating The unit is further configured to generate another OLC information
  • the sending unit is further configured to send the another OLC information to the base station, where the other OLC information includes an OLC determined according to a current processing capability of the processor in a current period.
  • the other OLC information includes OLC TBS information determined according to a current processing capability of the processor in a current period or current processing capability of the processor in a current period.
  • the determining unit determines that the current processing capability of the processor corresponds to a limit level
  • the N levels are decreased continuously
  • the generating unit is further configured to generate another OLC information
  • the sending unit sends the another OLC information to the base station, where the another OLC information includes an Nth cycle according to a current processing capability of the processor
  • the determining unit is configured to periodically determine a state of the processor.
  • the determining unit determines that the processor is still in an overload state, and the current processing capability of the processor corresponds to
  • the generating unit is further configured to generate the indication information of the lifting restriction level
  • the sending unit is further configured to send the indication information of the lifting restriction level to the base station, where M is a preset positive integer greater than one.
  • the generating unit is further configured to generate a cancellation The indication information of the restriction
  • the sending unit is further configured to send the indication information of the cancellation restriction to the base station.
  • the indication information of the cancellation restriction is a specific value OTI.
  • the determining unit determines that the processor is in a non-overload state for consecutive S cycles
  • the generating unit The method is further configured to stop generating OLC information
  • the sending unit is further configured to stop sending OLC information to the base station, where the S is a preset positive integer.
  • an embodiment of the present invention provides a base station.
  • the The line backhaul system includes a backhaul terminal and the base station, and the backhaul terminal and the base station transmit data through air interfaces.
  • the base station includes:
  • a receiving unit configured to receive the overload control OLC information reported by the backhaul terminal, where the OLC information includes an OLC transport block size TBS information or a current processing capability of a processor of the backhaul terminal, where the OLC TBS information is based on The current processing capability of the processor is determined; the control unit is configured to control, according to the OLC information, a size of a transport block sent to the backhaul terminal.
  • the OLC TBS information is an OLC TBS or an OLC TBS index OTI for indicating the OLC TBS.
  • the base station further includes: a storage unit, configured to store a correspondence table between the OTI and the OLC TBS;
  • the control unit is configured to: when the OLC information includes an OTI, search for an OLC TBS corresponding to an OTI in the OLC information in the correspondence table, and control that a transport block sent to the backhaul terminal is not greater than the Find the OLC TBS.
  • the processor capability of the processor is divided into multiple restriction levels And each restriction level corresponds to one OLC TBS, wherein the higher the restriction level, the lower the processing capability of the processor, and the smaller the corresponding OLC TBS.
  • the receiving unit is further configured to receive indication information of a lifting restriction level reported by the backhaul terminal, And a control unit, configured to determine, according to the indication information of the promotion restriction level, an OLC TBS after the restriction level is improved; and control, according to the determined OLC TBS, a transmission block size sent to the backhaul terminal.
  • the receiving unit is further configured to receive indication information of the cancellation restriction reported by the backhaul terminal; And the unit is further configured to cancel the restriction on the size of the transport block sent to the backhaul terminal according to the indication information of the cancellation restriction.
  • the embodiment of the present invention further provides a wireless network flow control method, in a wireless backhaul system, where the wireless backhaul system includes a backhaul terminal and a base station, and the backhaul terminal and the base station Data is transmitted through the air interface, and the method includes:
  • the backhaul terminal determines a state of its own processor; when the processor is in an overload state, the back The transmitting terminal determines a current processing capability of the processor; the backhaul terminal generates overload control OLC information according to a current processing capability of the processor, where the OLC information includes an OLC transport block size TBS information or a current Processing capability, wherein the OLC TBS information is determined based on a current processing capability of the processor; the backhaul terminal transmitting the OLC information to the base station.
  • the OLC TBS information is an OLC TBS or an OLC TBS index OTI for indicating the OLC TBS.
  • the backhaul terminal stores a correspondence between the OLC TBS information and the processor capability of the processor a table, and the backhaul terminal generates the overload control OLC information according to the current processing capability of the processor, including: the backhaul terminal searches for an OLC TBS corresponding to the current processing capability of the processor in the correspondence table. Information; generating OLC information including the OLC TBS.
  • the processor capability of the processor is divided into multiple restriction levels And each restriction level corresponds to one OLC TBS, wherein the higher the restriction level, the lower the processing capability of the processor, and the smaller the corresponding OLC TBS.
  • the backhaul terminal periodically determines a current processing capability of the processor.
  • the method further includes: when the determined limitation level of the current processing capability of the processor is increased, The returning terminal transmits another OLC information to the base station, where the other OLC information includes OLC TBS information determined according to a current processing capability of the processor in a current period or a current processing capability of the processor in a current period; Or, when the determined restriction level corresponding to the current processing capability of the processor does not change, the backhaul terminal does not send new OLC information to the base station; or, when determining the current processing capability of the processor When the corresponding restriction level is reduced, the backhaul terminal sends another OLC information to the base station, and the other OLC information includes an OLC TBS information or a current period determined according to a current processing capability of the processor in a current period. The current processing power of the processor.
  • the method further includes: when a limit level corresponding to a current processing capability of the processor is continuously decreased by N consecutive periods And the backhaul terminal sends another OLC information to the base station, where the other OLC information includes an OLC TBS information or an Nth period determined according to a current processing capability of the processor in an Nth period.
  • the current processing power of the processor wherein the N is a preset positive integer greater than one.
  • the backhaul terminal periodically determines a state of the processor.
  • the method further includes: when the processor is still in an overload state, and the current processing capability of the processor When the corresponding restriction level is unchanged for M consecutive periods, the backhaul terminal sends indication information of the lifting restriction level to the base station, where the M is a preset positive integer greater than 1.
  • the method further includes: when the processor is in a non-overload state, the backhaul terminal is The base station sends an indication to cancel the restriction.
  • the indication information of the cancellation restriction is a specific value OTI.
  • the method further includes: when the processor is in a non-overload state for consecutive S cycles, the back The transmitting terminal stops transmitting OLC information to the base station, where the S is a preset positive integer.
  • an embodiment of the present invention provides a wireless network flow control method, in a wireless backhaul system, where the wireless backhaul system includes a backhaul terminal and a base station, and between the backhaul terminal and the base station Transmitting data through an air interface, wherein the method comprises:
  • the base station Receiving, by the base station, overload control OLC information reported by the backhaul terminal, where the OLC information includes an OLC transport block size TBS information or a current processing capability of a processor of the backhaul terminal, where the OLC TBS information is according to the The current processing capability of the processor is determined; the base station controls the size of the transport block sent to the backhaul terminal according to the OLC information.
  • the OLC information includes an OLC transport block size TBS information or a current processing capability of a processor of the backhaul terminal, where the OLC TBS information is according to the The current processing capability of the processor is determined; the base station controls the size of the transport block sent to the backhaul terminal according to the OLC information.
  • the OLC TBS information is an OLC TBS or an OLC TBS index OTI for indicating the OLC TBS.
  • the base station when the OLC information includes an OTI, stores a correspondence table between the OTI and the OLC TBS. And controlling, by the base station, the size of the transport block sent to the backhaul terminal according to the OLC information, including: searching, by the base station, an OLC TBS corresponding to an OTI in the OLC information in the correspondence table; The transport block sent to the backhaul terminal is not greater than the found OLC TBS.
  • the processor capability of the processor is divided into multiple restriction levels And each restriction level corresponds to one OLC TBS, wherein the higher the restriction level, the lower the processing capability of the processor, and the smaller the corresponding OLC TBS.
  • the method further includes: receiving, by the base station, indication information of a lifting restriction level reported by the backhaul terminal; The base station determines, according to the indication information of the promotion restriction level, the OLC TBS after the restriction level is improved; and controls the transmission block size sent to the backhaul terminal according to the determined OLC TBS.
  • the method further includes: receiving, by the base station, indication information of the cancellation restriction reported by the backhaul terminal; The base station cancels the restriction on the size of the transport block sent to the backhaul terminal according to the indication information of the cancellation restriction.
  • the backhaul terminal determines the state of the processor; when the processor is in an overload state, the backhaul terminal determines the current processing capability of the processor; Generating OLC information, the OLC information including OLC TBS information or current processing capability of the processor, wherein the OLC TBS information is determined according to a current processing capability of the processor; The backhaul terminal sends the OLC information to the base station.
  • the size of the downlink TB can be controlled by the OLC information to prevent the packet loss situation that does not satisfy the Qos requirement from appearing.
  • FIG. 1 is a schematic structural diagram of a wireless backhaul system according to an embodiment of the present invention.
  • 2 is a schematic diagram of the impact of the packet length on the load of the backhaul terminal processor
  • FIG. 3 is a schematic structural diagram of a backhaul terminal according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 5 is a flowchart of a method for controlling a wireless network flow according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a logical channel identifier according to an embodiment of the present disclosure.
  • FIG. 7 is a flowchart of another wireless network flow control method according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of another wireless network flow control method according to an embodiment of the present invention.
  • FIG. 9 is a flowchart of another method for controlling traffic of a wireless network according to an embodiment of the present invention.
  • FIG. 10 is a flowchart of another method for controlling traffic of a wireless network according to an embodiment of the present invention.
  • FIG. 11 is a flowchart of another method for controlling traffic of a wireless network according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of another backhaul terminal according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of another base station according to an embodiment of the present invention.
  • FIG. 1 is a schematic structural diagram of a wireless backhaul system according to an embodiment of the present invention.
  • the backhaul system 110 includes a BS 111 and a backhaul terminal 112, wherein data transmission is performed between the BS 111 and the backhaul terminal 112 through an air interface.
  • the backhaul terminal 112 may be a terminal dedicated to the backhaul, which is the same as the normal terminal, and may be an ordinary terminal provided with a backhaul function, and is not limited herein.
  • the backhaul system 110 is located in the communication system and is used for transmitting data of other BSs 130, WiFi APs 140 or real-time monitoring devices 150 and the like.
  • the ordinary terminal 120 in the communication system accesses the wireless network through the other BS 130 or the WiFi AP 140, and then the backhaul terminal 112 functions as a terminal in the wireless network, and transmits data between the ordinary terminal 120 and the BS 130 or the WiFi AP 140. It is transmitted back to the core network (CN) 160 through the BS 111.
  • the core network (CN) 160 In order to distinguish between the BS 111 and the BS 130, they are referred to as a backhaul BS 111 and a serving BS 130, respectively, but the backhaul BS 111 can also serve as a serving BS of other terminals.
  • the BS in the present application may be a device for accessing a terminal to a wireless network in any network standard, a base station controller (BSC) or a base transceiver station (Base Transceiver Station) in a 2G network.
  • BSC base station controller
  • Base Transceiver Station Base Transceiver Station
  • BTS radio network controller in 3G network (radio network Controller, RNC) or Node B
  • RNC radio network Controller
  • eNB evolved Node B
  • the backhaul terminal reports the capability of the backhaul terminal, such as the capability information in Table 1, when accessing the BS.
  • the BS then schedules based on its uploaded capability information. For example, the size of the transport block is controlled according to the maximum number of bits of a downlink share channel (DL-SCH) transport block (TB) received within a transmission time interval (TTI).
  • DL-SCH downlink share channel
  • TTI transmission time interval
  • FIG. 2 is a schematic diagram of the effect of the measured packet length on the backhaul terminal processor.
  • the vertical axis represents the average packet length
  • the horizontal axis represents the packet per second (PPS) of the backhaul terminal processor.
  • PPS packet per second
  • the A position shown in the figure is the maximum amount of data that can be achieved by the air interface. If the average packet length becomes smaller, if the amount of data transmitted by the air interface is still maintained to improve the air interface utilization, then the processor requirements are met. It will inevitably increase, so in the case of small packets, there will be a situation where the processor overload is earlier than the air port overload. At this time, by using the above capability information to schedule the backhaul terminal, there is still a packet loss caused by the overload of the backhaul terminal that does not meet the QoS requirement.
  • the above capability information is reported only once during access, and can not truly reflect the actual situation of the processor of each device under different packet lengths, and the actual capacity of the processor varies with each device, therefore, only based on
  • the above capability information is scheduled to be sent back to the terminal, there is still a packet loss caused by the overload of the backhaul terminal that does not meet the QoS requirements. If the BS locally reduces the overload threshold and drops the packet according to the priority, it will also waste the air interface resources.
  • the present application proposes a mechanism for controlling a BS to schedule a backhaul terminal according to the real state of the backhaul terminal processor, so as to reduce packet loss caused by the overload of the backhaul terminal and not meeting the QoS requirement.
  • the backhaul terminal can be used to periodically detect the state of the processor.
  • OLC overload control
  • the overload control transport block can be generated according to the state of the processor.
  • the size (OLC TB Size, OLC TBS) informs the BS of the OLC TBS, so that the BS controls the size of the TB that is sent to the backhaul terminal accordingly.
  • the backhaul terminal can directly report the status of the processor to the BS, and the BS determines the size of the TB that is sent to the backhaul terminal according to the state information of the processor reported by the backhaul terminal. That is to say, according to the state of the processor of the backhaul terminal, it is determined that the TB size can be implemented in the backhaul terminal, or can be implemented in the BS.
  • the advantage of the backhaul terminal is that the air interface information reported by the backhaul terminal is small, which greatly saves the air interface resources, and can further use the indication information such as the index to indicate the TBS, thereby further reducing the reported air interface information. , saving air resources.
  • the backhaul terminal can periodically detect the state of the processor and report the information to the BS accordingly. Therefore, the BS can adjust the TB size in time to reduce the waste of air interface resources caused by the local overload threshold being too low.
  • FIG. 3 is a schematic structural diagram of a backhaul terminal according to an embodiment of the present invention.
  • the backhaul terminal is used in a wireless backhaul system, and the wireless backhaul system includes the backhaul terminal and a base station, and the backhaul terminal and the base station transmit data through an air interface.
  • the backhaul terminal shown in FIG. 3 may include: a determining unit 301, a generating unit 302, and a sending unit 303.
  • the determining unit 301 is configured to determine a state of the processor itself; and is further configured to determine a current processing capability of the processor when the processor is in an overload state.
  • the generating unit 302 is configured to generate OLC information according to the current processing capability of the processor, and the OLC information Includes current processing capabilities of OLC TBS information or processors.
  • the OLC TBS information is determined according to the current processing capability of the processor; wherein the OLC TBS information may be an OLC TBS or an OLC TBS Index (OTI) for indicating an OLC TBS.
  • OLC TBS Index OLC TBS Index
  • the transmitting unit 303 is configured to send the OLC information to the base station.
  • the backhaul terminal may further include: a storage unit.
  • the storage unit may be configured to store a correspondence table between the OLC TBS information and the processor capability of the processor.
  • the generating unit 302 may be further configured to search for a current processing capability of the processor in the correspondence table. OLC TBS information, and generates OLC information including the OLC TBS.
  • the processor capability of the processor may be divided into multiple restriction levels, and each restriction level corresponds to one OLC TBS, wherein the higher the restriction level, the lower the processing capability of the processor, and the smaller the corresponding OLC TBS.
  • the determining unit 301 is further configured to periodically determine a current processing capability of the processor.
  • the generating unit 302 is further configured to generate another OLC information
  • the sending unit 303 is further configured to: Transmitting the another OLC information to the base station, the another OLC information including OLC TBS information determined according to a current processing capability of the processor in a current period or current processing capability of the processor in a current period; or, when When the limiting level corresponding to the current processing capability of the processor determined by the determining unit 301 is unchanged, the generating unit 302 does not generate new OLC information, and the sending unit 303 does not send a new OLC to the base station.
  • the generating unit 302 is further configured to generate another OLC information
  • the sending unit 303 is configured to The base station transmits the another OLC information, the other OLC information including OLC TBS information or current period determined according to current processing capability of the processor in a current period The current processing power of the processor.
  • the generating unit 302 is further configured to generate another OLC information, and the sending unit 303 transmitting the another OLC information to the base station, where the other OLC information includes OLC TBS information determined according to a current processing capability of the processor in an Nth period or current processing of the processor in an Nth period Capability, where N is a predetermined positive integer greater than one.
  • the determining unit 301 can also be used to periodically determine the state of the processor.
  • the sending unit 303 is further configured to: when the processor is still in an overload state, and the limiting level corresponding to the current processing capability of the processor is unchanged, the indication information of the lifting restriction level is sent to the base station, where M Is a positive integer greater than 1 by default.
  • the generating unit 302 is further configured to generate indication information for canceling the restriction
  • the sending unit 303 is further configured to send an indication of canceling the restriction to the base station.
  • the indication information of the cancellation restriction may be a specific value OTI.
  • the generating unit 302 is further configured to stop generating OLC information
  • the sending unit 303 is further configured to stop the The base station sends OLC information, where the S is a preset positive integer.
  • the determining unit is configured to determine a state of the processor
  • the acquiring unit is configured to determine a current processing capability of the processor when the processor is in an overload state, and generate a unit for The current processing capability of the processor, generating overload control OLC information, the OLC information including OLC transport block size TBS information or current processing capability of the processor, wherein the OLC TBS information is based on current processing capabilities of the processor
  • Determining a sending unit, configured to send the OLC information to the base station.
  • FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station is used in a wireless backhaul system, and the wireless backhaul system includes a backhaul terminal and a base station, and the data is transmitted through the air interface between the backhaul terminal and the base station.
  • the base station may be the base station in the foregoing embodiment.
  • the base station may include: a receiving unit 401 and a control unit 402.
  • the receiving unit 401 is configured to receive the OLC information reported by the backhaul terminal, where the OLC information includes OLCTBS information or a current processing capability of a processor of the backhaul terminal.
  • the OLC TBS information is determined according to a current processing capability of the processor, and the OLC TBS information may be an OLC TBS or an OLC TBSOTI for indicating the OLC TBS.
  • the control unit 402 is configured to control the size of the transport block sent to the backhaul terminal according to the OLC information.
  • the base station may further include a storage unit.
  • the storage unit is configured to store a correspondence table of the OTI and the OLC TBS; the control unit may be further configured to: when the OLC information includes the OTI, look up the OLC information in the correspondence table
  • the OTC corresponds to the OLC TBS, and controls that the transport block sent to the backhaul terminal is not greater than the found OLC TBS.
  • the processor capability of the processor is divided into multiple restriction levels, and each restriction level corresponds to one OLC TBS, wherein the higher the restriction level, the lower the processing capability of the processor, and the corresponding OLC TBS The smaller.
  • the receiving unit 401 is further configured to receive the indication information of the promotion restriction level reported by the backhaul terminal, where the control unit 402 is further configured to determine the restriction level according to the indication information of the promotion restriction level.
  • the promoted OLC TBS controlling the size of the transport block sent to the backhaul terminal according to the determined OLC TBS.
  • the receiving unit 401 is further configured to receive the indication information of the cancellation restriction reported by the backhaul terminal, where the control unit 402 is further configured to cancel the sending to the location according to the indication information of the cancellation restriction.
  • the receiving unit is configured to receive the overload control OLC information reported by the backhaul terminal, where the OLC information includes an OLC transport block size TBS information or a current processing capability of the processor of the backhaul terminal, where The OLC TBS information is determined according to the current processing capability of the processor; the control unit is configured to control the size of the transport block sent to the backhaul terminal according to the OLC information.
  • the base station can control the size of the downlink TB according to the OCL information sent by the backhaul terminal, and prevent the processor from being overloaded by the backhaul terminal, thereby preventing the packet loss situation that does not meet the Qos requirement.
  • FIG. 5 is a flowchart of a method for controlling a wireless network flow according to an embodiment of the present invention. The method is used in the above wireless backhaul system, and includes the following steps:
  • step 501 the backhaul terminal determines the state of its own processor.
  • Step 502 when the processor is in an overload state, the backhaul terminal determines the current processing capability of the own processor.
  • Step 503 The backhaul terminal generates OLC information according to the determined current processing capability of the processor, where the OLC information includes OLC TBS information or a current processing capability of the processor, where the OLC TBS information is a current processing of the backhaul terminal according to the processor itself.
  • the OLC information includes OLC TBS information or a current processing capability of the processor, where the OLC TBS information is a current processing of the backhaul terminal according to the processor itself.
  • Step 504 The backhaul terminal sends the OLC information to the BS.
  • the BS can control the size of the downlink TB according to the received OLC information, so as to reduce the packet loss caused by the overload of the backhaul terminal and not meeting the QoS requirement.
  • the backhaul terminal can determine the state of the processor by the occupancy of the processor. For example, when the occupancy of the processor reaches a certain threshold, the processor is in an overload state.
  • the threshold is referred to as an overload threshold, which can be set as needed, for example, 80%, 90%, etc., and the present application does not impose any limitation. It should be noted that the overload state in this application is not a real overload, but a state in which the processor reaches a certain occupancy rate.
  • a service model of the backhaul terminal processor and the service type may be established in advance, for example, the ratio of the uplink service and the downlink service per unit (for example, mega M) traffic occupation processor is based on the backhaul.
  • the service traffic of the terminal determines the occupancy rate of the processor, thereby determining whether the processor is in an overload state.
  • the service model can further refine the services to different bearers, for example, packets of different lengths (1200 bytes, 64 bytes, etc.) are occupied by the uplink and downlink per unit flow processor. rate. It can be obtained by establishing a capability baseline of the processor, recording the occupancy rate of each unit of the flow processor, including the data packets of different lengths under the single and multiple bearers, and the uplink and downlink per unit flow processors.
  • Determining whether the processor is in an overload state can be obtained by calculating whether the total traffic of the backhaul terminal exceeds the maximum service traffic in the processor overload threshold.
  • the processor is judged to be in an overload state; when not exceeding, the processor is judged to be in a non-overload state; wherein the total traffic of the backhaul terminal is exactly equal to the maximum service traffic within the processor overload threshold, the processor may be judged to be in an overload state, and may also be judged It is not in an overload state, and the present application does not limit it, but takes an overload state as an example.
  • the uplink service traffic and the downlink traffic traffic can be unified into one type of service traffic, for example, unified into downlink traffic traffic or uplink traffic traffic.
  • the uplink traffic is converted into the equivalent downlink traffic.
  • the formula for judging whether the processor is overloaded is as follows:
  • the above method unifies the traffic flow into the downlink traffic, and then determines the state of the processor.
  • the service traffic can be unified into the uplink service traffic.
  • the maximum service traffic in the processor overload threshold occurs in the form of the uplink maximum service traffic in the processor overload threshold. Since the downlink traffic is generally greater than the uplink traffic, it is preferable to use the unified downlink traffic to save the conversion amount.
  • the loopback terminal can periodically determine whether the processor is in an overload state, or can trigger the judgment by an event. Whether the processor is in an overload state, and may be triggered by the BS to determine whether the processor is in an overload state. For example, when the size of the downlink TB is greater than a certain threshold, the backhaul terminal is triggered to determine whether the processor is in an overload state, and the application does not do any limit.
  • the setting of the period can be set according to the actual needs of the network, and the application does not impose any restrictions.
  • the backhaul terminal can further determine the current processing capability of the processor based on the traffic model.
  • the BS mainly performs traffic control for downlink services.
  • the processing capability here mainly refers to the processing capability of the downlink service. Therefore, the downlink downlink service traffic in the processor overload threshold can be deducted from the equivalent downlink traffic of the uplink traffic, and the maximum downlink traffic that can be currently processed can be obtained.
  • the backhaul terminal can directly send the maximum downlink traffic as the current processing capability information to the BS, and the BS determines the TBS corresponding to the maximum downlink traffic, as the OLC TBS, and then controls the delivered TB not to be greater than the OLC TBS. .
  • the backhaul terminal may also determine the OLC TBS under the maximum downlink traffic, and send the OLC TBS to the BS, so that the BS controls the downlink TB not to be greater than the OLC TBS according to the OLC TBS.
  • the air interface resources can be saved relative to the current processing capability information of the direct sending processor, and for the BS, the calculation of the downlink TB is not required for each terminal.
  • the backhaul terminal can report the index to indicate the OLC TBS, so as to further reduce the size of the reported air interface information, and further save the air interface resources.
  • the OLC TBS information may be the OLC TBS itself, or may be an index indicating the OLC TBS, that is, an Overload Control Transport Block Size Index (OLC TBS Index, OTI).
  • OLC TBS Index OTI
  • the backhaul terminal can store a table that reflects the correspondence between the OLC TBS information and the current processor capabilities of the processor. In this way, after determining the current processing capability of the processor, the backhaul terminal can find the corresponding OLC TBS information through the lookup table.
  • the table can be established in advance by establishing a capability baseline for processing the backhaul terminal. For example, the static table entry is recorded under single and multiple bearers, and the occupancy rate of each unit of the flow processor of different lengths of TB is obtained at the same time.
  • the upstream and downstream of the overload threshold can handle the maximum traffic, as well as the maximum TBS.
  • FDD frequency time division duplex
  • TDD time division duplex
  • TDD time division duplex
  • TDD time division duplex
  • Table 2 can be applied to the case where the configuration of the uplink and downlink ratios in the TDD system is "0".
  • the processing power of the processor is characterized by the maximum downlink rate, and can be divided into 11 levels, each level corresponding to one OCL TBS and the index of the TBS, OTI.
  • the table may not be stored locally.
  • the corresponding part in the table can be stored locally. For example, when the OLC TBS is reported, only the contents of the second column and the third column can be stored; when the OTI is reported, only the first column can be stored. And the contents of column 3.
  • the contents of the three columns can also be stored in the backhaul terminal.
  • the BS may store the contents of the second column and the third column to determine the OLC TBS according to the current processing capability of the backhaul terminal processor, thereby controlling the downlink TB. Size; of course, the BS may not store the table, and directly calculate the size of the TB according to the current processing capability of the backhaul terminal processor, so that the maximum downlink rate of the scheduled backhaul terminal does not exceed the current processing capability of the backhaul terminal processor.
  • the BS may not use the above table to directly control the size of the downlink TB by using the OLC TBS, so that the maximum downlink rate of the scheduled backhaul terminal does not exceed the current processing capability of the backhaul terminal processor.
  • the BS may store the contents of the first column and the second column to find the corresponding OLC TBS according to the OTI, and use the OLC TBS to control the size of the downlink TB, so that the scheduling is performed.
  • the maximum downlink rate of the backhaul terminal does not exceed the current processing capability of the backhaul terminal processor.
  • the backhaul terminal and the BS can also store the same table, that is, the above three columns can be stored in the BS and the backhaul terminal.
  • the BS when the BS receives the OTI reported by the backhaul terminal, it can search the above table according to the value of the OTI to obtain the corresponding OLC TBS and the maximum downlink rate. Then, the size of the downlink TB is controlled so as not to be greater than the OLC TBS, that is, the downlink scheduling is performed at the maximum downlink rate that is found.
  • Table 3 can be applied to the case where the configuration of the uplink and downlink ratio in the TDD system is "1".
  • the contents of Table 3 are the same as those described in Table 2, and are not described here.
  • Table 4 can be applied to the case where the configuration of the uplink and downlink ratio in the TDD system is "2".
  • the contents of Table 4 are the same as those described in Table 1, and are not described here.
  • the backhaul terminal can be implemented by reporting an OTI with a value of 0.
  • the BS can perform downlink scheduling according to the capability of the backhaul terminal to report at the time of access.
  • the above frame structure of several uplink and downlink ratios in the TDD system is taken as an example, but it is not intended to limit the present invention.
  • a similar table can be applied to FDD, as well as other matching frame structures.
  • the present application also does not impose any limitation on the representation of the restriction level, the correspondence between the OLC TBSize and the OTI. Total
  • the above table is for example only and is not intended to limit the application.
  • the OLC information may be sent as an independent air interface message, or may be carried in an existing air interface message.
  • MCE media access control control element
  • a MAC header for a DL-SCH, an uplink shared channel (UL-SCH), and a multicast channel (MCH) includes a logical channel identifier (LCID).
  • Field wherein the structure of the LCID field for the UL-SCH is as shown in Table 2, wherein the reserved field can be used to represent the OTI, and its structure is as shown in FIG. 6, wherein the unused bits are used as reserved bits, such as As shown by R in the figure, it can be filled with "0".
  • the processor capability of the processor can be divided into multiple restriction levels, and each restriction level corresponds to one OLC TBS, wherein the higher the restriction level, the lower the processing capability of the processor, and the corresponding OLC TBS. The smaller.
  • the backhaul terminal can periodically determine the current processing capability of the processor. If the processing capability changes, the BS can be notified, so that the BS can make an adaptive adjustment to the downlink scheduling.
  • This period can be set as needed, and no limitation is imposed on this application. It can be in units of transmission time intervals (TTI), for example 100 TTIs.
  • the backhaul terminal can periodically determine its own processor processing capabilities. Take Continuing with the description, when the processing capability of the processor changes or does not change, for example, when the restriction level is increased, decreased, or unchanged, the processing mode of the terminal is returned.
  • the backhaul terminal may send another OLC information to the BS, the other OLC information including the current period being determined according to the current processing capability of the processor.
  • the backhaul terminal may not send new OLC information to the BS, so that the air interface resource can be saved, and the BS can continue to use the previous OLC information. Perform downlink scheduling.
  • the backhaul terminal may send another OLC information to the BS, the other OLC information including the current period determined according to the current processing capability of the processor.
  • Step 701 The backhaul terminal determines the state of the processor itself.
  • Step 702 when the processor is in an overload state, the backhaul terminal determines the current processing capability of the processor itself;
  • Step 703 The backhaul terminal generates OLC information according to the determined current processing capability of the processor, where the OLC information includes OLC TBS information or a current processing capability of the processor, where the OLC TBS information is a current processing of the backhaul terminal according to the processor.
  • the OLC information includes OLC TBS information or a current processing capability of the processor, where the OLC TBS information is a current processing of the backhaul terminal according to the processor.
  • Step 704 The backhaul terminal periodically determines its own processor processing capability.
  • Step 705 When the determined restriction level corresponding to the current processing capability of the processor increases, the backhaul terminal may send another OLC information to the BS, where the other OLC information includes an OLC TBS determined according to the current processing capability of the processor in the current period. Information or the current processing power of the processor in the current cycle;
  • Step 706 When the determined restriction level corresponding to the current processing capability of the processor is unchanged, the backhaul terminal may not send new OLC information to the BS.
  • Step 707 when the determined restriction level corresponding to the current processing capability of the processor is reduced, the backhaul terminal may send another OLC information to the BS, where the other OLC information includes an OLC TBS determined according to the current processing capability of the processor in the current period.
  • the current processing power of the information or processor of the current cycle may be sent to the BS, where the other OLC information includes an OLC TBS determined according to the current processing capability of the processor in the current period.
  • the backhaul terminal may not immediately send the OLC information to the BS, but continue to determine the processing capability of the processor.
  • step 708 is performed:
  • the backhaul terminal sends another OLC information to the BS, the other OLC information including the OLC TBS determined according to the current processing capability of the processor in the Nth cycle.
  • Information or the current processing power of the processor of the Nth cycle where N is a preset positive integer greater than one. In this way, the air interface information reported can be further reduced, and air interface resources can be saved.
  • the returning terminal may send the indication of the lifting restriction level to the BS, and the indication information of the lifting restriction level may be OTI, which is used to indicate the OLC TBS corresponding to the level of restriction of the promotion level.
  • the indication information may also be only one indication identifier.
  • the BS may increase the restriction level according to the stored table, and perform downlink scheduling according to the upgraded restriction level.
  • the backhaul terminal may send an indication of canceling the restriction to the BS, for example, an OTI with a value of 0.
  • the BS can cancel the restriction on the size of the TB sent to the backhaul terminal according to the indication information of the cancellation restriction.
  • the cancellation restriction mentioned here means that the size of the TB is not limited by using the OLC information, but the size of the TB is still limited in the prior art.
  • the backhaul terminal can immediately send the OLC information to the BS. It is also possible to stop transmitting OLC information to the BS when the consecutive S cycles are not in an overload state, where S is a preset positive integer.
  • the backhaul terminal determines the state of the processor; when the processor is in an overload state, the backhaul terminal determines the current processing capability of the processor; the backhaul terminal according to the The current processing capability of the processor, generating OLC information, the OLC information including OLC TBS information or current processing capability of the processor, wherein the OLC TBS information is determined according to a current processing capability of the processor; The transmitting terminal sends the OLC information to the base station.
  • the size of the downlink TB can be controlled by the OLC information to prevent the packet loss situation that does not satisfy the Qos requirement from appearing.
  • FIG. 9 is a flowchart of a method for controlling a wireless network flow according to an embodiment of the present invention. The method is used in the above wireless backhaul system, and includes the following steps:
  • Step 901 The base station receives the OLC information reported by the backhaul terminal, where the OLC information includes OLC TBS information or current processing capability of a processor of the backhaul terminal, wherein the OLC TBS information is determined based on a current processing capability of the processor.
  • Step 902 The base station controls, according to the OLC information, a size of a transport block sent to the backhaul terminal.
  • the processor capability of the processor is divided into a plurality of restriction levels, and each restriction level corresponds to one OLC TBS, wherein the higher the restriction level, the lower the processing capability of the processor, and the smaller the corresponding OLC TBS.
  • the base station may search for an OLC TBS corresponding to the OTI in the correspondence table; and control is sent to the backhaul terminal.
  • the transport block is not larger than the found OLC TBS.
  • the backhaul terminal may further report the indication of the promotion restriction level after the reported OLC information, so the base station may further perform step 903 to step 905.
  • Step 903 The base station receives the indication information of the lifting restriction level reported by the backhaul terminal.
  • Step 904 The base station determines, according to the indication information of the promotion restriction level, an OLC TBS after the restriction level is improved.
  • Step 905 Control, according to the determined OLC TBS, a transport block size sent to the backhaul terminal.
  • the backhaul terminal may report the cancellation restriction after the reported OLC information or after the indication information of the lifting restriction level is reported, so the base station performs step 902 or Step 905 to step 907 can also be continued after step 905.
  • Step 906 The base station receives the indication information of the cancellation restriction reported by the backhaul terminal.
  • Step 907 The base station cancels the restriction on the size of the transport block sent to the backhaul terminal according to the indication information of the cancellation restriction.
  • the base station receives the overload control OLC information reported by the backhaul terminal, where the OLC information includes an OLC transport block size TBS information or a current processing capability of a processor of the backhaul terminal, where the OLC TBS The information is determined according to a current processing capability of the processor; the base station controls a size of a transport block sent to the backhaul terminal according to the OLC information.
  • the base station can control the size of the downlink TB according to the OCL information sent by the backhaul terminal, and prevent the processor from being overloaded by the backhaul terminal. In turn, it prevents the loss of packets that do not meet the Qos requirements.
  • FIG. 12 is a schematic structural diagram of another backhaul terminal according to an embodiment of the present invention.
  • the backhaul terminal includes a physical module such as a processor 1201, a memory 1202, and a transceiver 1203.
  • Physical modules such as the processor 1201, the memory 1202, and the transceiver 1203 are connected to each other.
  • the memory 1202 is configured to store computer execution instructions.
  • the program can include program code, the program code including computer executed instructions.
  • the memory 1202 may include a random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage.
  • the processor capability of the processor 1201 is divided into multiple restriction levels, and each restriction level corresponds to one OLC TBS, wherein the higher the restriction level, the lower the processing capability of the processor 1201, and the smaller the corresponding OLC TBS .
  • the processor 1201 is configured to determine a state of itself; when it is in an overload state, determine its current processing capability; generate an overload control OLC information according to its current processing capability, the OLC information including an OLC transport block size TBS information or itself The current processing power, where the OLC TBS information is determined based on its current processing capabilities.
  • the OLC TBS information may be an OLC TBS or an OLC TBS Index OTI for indicating an OLC TBS.
  • the transceiver 1203 is configured to send the OLC information to the base station.
  • the processor 1201 is further configured to search for OLC TBS information corresponding to the current processing capability of the correspondence table, and generate OLC information including the OLC TBS.
  • the processor 1201 may periodically determine its current processing capability.
  • the processor 1201 is further configured to: when determining that the limit level corresponding to the current processing capability of the processor 1201 increases, generate new OLC information, and send the OLC information to the base station by using the transceiver 1203, where the OLC information includes a current period according to the processing.
  • the current processing capability of the device 1201 determines the OLC TBS information or the current processing capability of the processor 1201 of the current period; or, when it is determined that the restriction level corresponding to the current processing capability of the processor 1201 is unchanged, no new generation is required or sent to the base station.
  • OLC information or, when it is determined that the limit level corresponding to the current processing capability of the processor 1201 is reduced, new OLC information is generated, and the OLC information is sent to the base station by the transceiver 1203, the OLC information including the current period according to the processor 1201
  • the current processing capability determines the OLC TBS information or the current processing power of the processor 1201 of the current cycle.
  • the processor 1201 is further configured to: when the limit level corresponding to the current processing capability of the processor 1201 decreases by a continuous N cycles, generate new OLC information, and send the identifier to the base station by using the transceiver 1203.
  • OLC information including OLC TBS information determined according to the current processing capability of the processor 1201 in the Nth cycle or current processing capability of the processor 1201 in the Nth cycle, where N is a preset positive integer greater than one.
  • the processor 1201 can periodically determine its own state.
  • the processor 1201 is further configured to generate the indication information of the lifting restriction level when the processor 1201 is still in an overload state, and the limiting level corresponding to the current processing capability of the processor 1201 is unchanged, and the transceiver information is generated by the transceiver 1203.
  • the indication information when the processor 1201 is in a non-overload state for consecutive S cycles, stop generating and transmitting OLC information to the base station, where S is a preset positive integer.
  • the indication information for canceling the restriction may be an OTI of a specific value.
  • the backhaul terminal determines the state of the processor; when the processor is in an overload state, the backhaul terminal determines the current processing capability of the processor; the backhaul terminal according to the The current processing capability of the processor, generating OLC information including OLCTBS information or current processing capabilities of the processor, wherein the OLC TBS information is determined based on a current processing capability of the processor; the backhaul The terminal sends the OLC information to the base station.
  • the size of the downlink TB can be controlled by the OLC information to prevent the packet loss situation that does not satisfy the Qos requirement from appearing.
  • FIG. 13 is a schematic structural diagram of another base station according to an embodiment of the present invention.
  • the base station includes a physical module such as a processor 1301, a memory 1302, and a transceiver 1303. Physical modules such as the processor 1301, the memory 1302, and the transceiver 1303 are connected to each other.
  • the memory 1302 is configured to store computer execution instructions.
  • the program can include program code, the program code including computer executed instructions.
  • the memory 1302 may include a random access memory (RAM), and may also include a non-volatile memory such as at least one disk storage.
  • the transceiver 1303 is configured to receive the overload control OLC information reported by the backhaul terminal, where the OLC information includes an OLC transport block size TBS information or a current processing capability of the processor 1301 of the backhaul terminal, where the OLC TBS information It is determined according to the current processing capability of the processor 1301.
  • the OLC TBS information is an OLC TBS or an OLC TBS index OTI for indicating the OLC TBS.
  • the processor 1301 is configured to control, according to the OLC information, a size of a transport block sent to the backhaul terminal.
  • the controller may be further configured to: when the OLC information includes an OTI, and the storage 1302 stores a correspondence table between the OTI and the OLC TBS, search for an OLC TBS corresponding to the OTI in the correspondence table; and send the control The transport block to the backhaul terminal is not greater than the found OLC TBS.
  • the transceiver 1303 is further configured to receive the indication information of the lifting restriction level reported by the backhaul terminal, where the processor 1301 is further configured to determine the restriction level according to the indication information of the lifting restriction level.
  • the promoted OLC TBS controlling the size of the transport block sent to the backhaul terminal according to the determined OLC TBS.
  • the transceiver 1303 is further configured to receive the indication information of the cancellation restriction reported by the backhaul terminal, where the processor 1301 is further configured to cancel the sending to the office according to the indication information of the cancellation restriction.
  • the base station receives the overload control OLC information reported by the backhaul terminal, where the OLC information includes an OLC transport block size TBS information or a current processing capability of a processor of the backhaul terminal, where the OLC TBS The information is determined according to a current processing capability of the processor; the base station controls a size of a transport block sent to the backhaul terminal according to the OLC information.
  • the base station can control the size of the downlink TB according to the OCL information sent by the backhaul terminal, and prevent the processor from being overloaded by the backhaul terminal, thereby preventing the packet loss situation that does not meet the Qos requirement.
  • the present invention further provides a computer storage medium, wherein the computer storage medium may store a program, and the program may include some or all of the steps in various embodiments of the calling method provided by the present invention.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).
  • the techniques in the embodiments of the present invention can be implemented by means of software plus a necessary general hardware platform. Based on such understanding, the technical solution in the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product, which may be stored in a storage medium such as a ROM/RAM. , a disk, an optical disk, etc., including instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or portions of the embodiments.
  • a computer device which may be a personal computer, server, or network device, etc.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

La présente invention concerne un terminal de liaison terrestre, une station de base et un procédé de commande de flux pour un réseau sans fil. Le terminal de liaison terrestre détermine l'état d'un processeur du terminal de liaison terrestre ; lorsque le processeur est dans un état de surcharge, le terminal de liaison terrestre détermine la capacité de traitement actuelle du processeur ; le terminal de liaison terrestre génère des informations de commande de surcharge (OLC pour OverLoad Control) en fonction de la capacité de traitement actuelle du processeur, les informations de commande OLC comprenant des informations de taille de bloc de transport (TBS pour Transport Block Size) de commande OLC ou la capacité de traitement actuelle du processeur, et les informations de taille TBS de commande OLC étant déterminées en fonction de la capacité de traitement actuelle du processeur ; et le terminal de liaison terrestre envoie les informations de commande OLC à la station de base. Au moyen de la présente invention, le mécanisme de programmation du terminal de liaison terrestre par la station de base peut être commandé en fonction de l'état réel du processeur du terminal de liaison terrestre de sorte à réduire la perte de paquets qui ne satisfait pas l'exigence de qualité de service (QoS pour Quality of Service) et est provoquée par la surcharge du terminal de liaison terrestre.
PCT/CN2014/093604 2014-12-11 2014-12-11 Terminal de liaison terrestre, station de base et procédé de commande de flux pour un réseau sans fil Ceased WO2016090607A1 (fr)

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