CN102740379A - Method and system for optimization of quality of server and network element of network side - Google Patents
Method and system for optimization of quality of server and network element of network side Download PDFInfo
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Abstract
The invention discloses a method and system for optimization of the quality of service (QoS) and a network element of a network side. The QoS optimization method comprises the following steps that: a network element of a network side issues packet data convergence protocol (PDCP) layer measurement control information to a terminal; the network element of the network side receives measurement result information that is reported after measurement on a data packet of a PDCP layer by the terminal according to the PDCP layer measurement control information and carries out optimization on the QoS of the network according to the measurement result information. According to the invention, the QoS of the system is improved and the user experience is enhanced.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method and a system for optimizing quality of service, and a network element on a network side.
Background
Quality of Service (QoS) is a security mechanism for a network, and is a technique for solving the problems of network delay and congestion. For network traffic, the quality of service includes transmission bandwidth, transmission delay, packet loss rate of data, and the like. In the network, the service quality can be improved by ensuring the transmission bandwidth, reducing the transmission time delay, reducing the packet loss rate of data, reducing the time delay jitter and other measures. Network resources are always limited, and a requirement for quality of service arises whenever there is a situation in which network resources are seized. The quality of service is relative to network traffic, and may be at the expense of the quality of service of other traffic while ensuring the quality of service of certain types of traffic. For example, in the case of a fixed network total bandwidth, if a certain type of service occupies more bandwidth, the other services can use less bandwidth, and thus the service occupying more bandwidth may affect the use of the other services. Therefore, a network manager needs to reasonably plan and allocate network resources according to the characteristics of various services, so that the network resources are efficiently utilized.
In an Evolved Packet System (EPS), the basic granularity of QoS control is Bearer (Bearer), that is, all data traffic on the same Bearer will obtain the same QoS guarantee, and different types of bearers provide different QoS guarantees. The bearer level QoS parameters include a QoS Class Identifier (QoS Class Identifier, abbreviated as QCI), Allocation and Retention Priority (ARP), Guaranteed Rate (Guaranteed BitRate, abbreviated as GBR), Maximum Bit Rate (Maximum Bit Rate, abbreviated as MBR), and/or Aggregate Maximum Bit Rate (AMBR). On a Radio Access Network (RAN for short), one Radio Bearer (RB for short) corresponds to one EPS Bearer.
In the user plane, each RB corresponds to a Packet Data Convergence Protocol (PDCP) layer entity and a Radio Link Control (RLC) entity, and is scheduled by a Medium Access Control (MAC) layer, and different entities of the user plane jointly guarantee Data transmission of the RB, thereby guaranteeing QoS requirements of users. The specific services provided by the PDCP sublayer may include: performing header compression and decompression; encryption/decryption of user plane data and control plane data; provide PDCP sequence numbers for use by radio bearers, etc. The functions supported by the RLC sublayer include: transmitting an RLC Protocol Data Unit (PDU for short); segment, combine, and reassemble RLC Service Data units (SDU for short), and the like. Some of the main functions provided by the MAC sublayer include: mapping between logical channels and transport channels; through Hybrid Automatic Repeat Request (HARQ for short); performing priority processing between logical channels of User Equipment (User Equipment, abbreviated as UE); carrying out priority processing between the UE by means of dynamic scheduling; selecting a transmission format; logical channel priority management. In addition, Radio Resource Management (RRM) strategies such as admission control, mobility, scheduling algorithm, etc. on the wireless side are also used to ensure the QoS requirements of the users.
However, in the related art, since the QoS parameters and algorithms configured on the network side are not properly matched with the requirements of the services, a problem that the QoS requirements of the users cannot be met often occurs, and an effective solution to the problem has not been proposed at present.
Disclosure of Invention
The main objective of the present invention is to provide a QoS optimization scheme, so as to at least solve the problem in the related art that the QoS requirements of the users cannot be met due to inappropriate matching between the QoS parameters and algorithms configured on the network side and the requirements of the services.
To achieve the above object, according to one aspect of the present invention, there is provided a method for optimizing quality of service.
The method for optimizing the QoS comprises the following steps: a network side network element sends PDCP layer measurement control information to a terminal; and the network element at the network side receives the measurement result information reported after the terminal measures the data packet of the PDCP layer according to the measurement control information of the PDCP layer, and optimizes the QoS of the network according to the measurement result information.
Further, the network element at the network side issues PDCP layer measurement control information to the terminal through the first special message of the control plane; and the terminal reports the measurement result information through the second special message of the control plane.
Further, before the network element at the network side receives the measurement result information reported by the terminal, the method further includes: the terminal determines a measurement mechanism according to the PDCP layer measurement control information, wherein the measurement mechanism comprises one of the following: the periodic reporting of the measurement result information, the reporting of the event trigger measurement result information, the DPCP layer measurement of the terminal and the reporting of the measurement result information are all event triggers; and the terminal measures the data packet of the PDCP layer according to the determined measurement mechanism and reports the measurement result information.
Further, reporting the measurement result information by the terminal includes: the terminal sends an indication that the terminal has measurement result information to be reported to a network side network element, and when the network side network element requests the terminal to report the measurement result information, the terminal reports the measurement result information to the network side network element; or, under the condition that the terminal cannot determine the mode of reporting the measurement result information from the PDCP layer measurement control information, the terminal automatically determines when to report the measurement result information to the network element on the network side.
Further, the PDCP layer measurement control information includes at least one of: target measurement quantity, target process of measurement, measurement report information and measurement trigger information.
Further, the target measurement quantity comprises a performance index of the PDCP packet and/or an identification of the measurement service, wherein the performance index of the PDCP packet comprises at least one of: throughput, packet loss rate, packet delay; the measurement service is an uplink service, and the identifier of the measurement service comprises at least one of the following: evolved packet system EPS bearer identification, radio bearer identification, QoS class identifier.
Further, when the terminal measures the data packet of the PDCP layer before the network element on the network side receives the measurement result information reported by the terminal, the measurement mode of the packet delay is as follows: the terminal records the time t1 when the data packet of the PDCP layer reaches the PDCP layer of the terminal and the time t2 when the network element at the network side receives the confirmation message returned to the terminal after receiving the data packet; the terminal subtracts t1 from t2 to obtain the packet delay.
Further, the target process of the measurement is a process state in which the terminal is located when the measurement is performed, and includes at least one of the following: switching process, radio resource control RRC reestablishment process and normal service process.
Further, the measurement report information is a period for the terminal to report the measurement result information or an event for triggering the terminal to report the measurement result information, wherein the event includes at least one of the following events: and after the preset time passes after the measurement is started, the storage space of the measurement result is larger than a preset threshold, the electric quantity of the terminal is lower than the preset threshold, and the measurement service is ended.
Further, the measurement trigger information is a trigger condition for the terminal to perform PDCP measurement, wherein the trigger condition includes at least one of: the wireless signal quality is lower than the predetermined threshold, the terminal is in the predetermined area, and the satisfaction degree of the user is lower than the predetermined requirement.
Further, the network element at the network side issuing PDCP layer measurement control information to the terminal includes: the network element at the network side modifies the measurement control information of the PDCP layer and sends the modified measurement control information of the PDCP layer to the terminal; or, the network element at the network side carries an identifier indicating that the terminal terminates the measurement target measurement volume in the measurement control information of the PDCP layer.
Further, the measurement result information includes at least one of: a PCDP measurement result, a radio signal quality, service QoS parameter information corresponding to the measured PDCP, measured time information, location information of the terminal, a mobility state of the terminal, and a process state in which the terminal is in measuring.
Further, the optimizing, by the network element at the network side according to the PDCP measurement result, the QoS of the network includes: and the network element at the network side optimizes configuration parameters and/or a radio resource management algorithm of the network according to the PDCP measurement result, wherein the configuration parameters of the network comprise the discarding time of the PDCP data packet.
In order to achieve the above object, according to another aspect of the present invention, a network element on a network side is also provided.
The network side network element according to the invention comprises: the issuing module is used for issuing the measurement control information of the PDCP layer to the terminal; a receiving module, configured to receive measurement result information reported by the terminal after measuring a data packet of the PDCP layer according to the PDCP layer measurement control information; and the QoS optimization module is used for optimizing the QoS of the network according to the measurement result information.
Further, in a long term evolution LTE system, the network side network element is an evolved node b eNB; in the UMTS, the network element on the network side is a radio network controller RNC.
To achieve the above object, according to still another aspect of the present invention, there is also provided a system for optimizing quality of service.
The system for optimizing the quality of service (QoS) comprises a terminal and the network side network element, wherein the terminal comprises: the measurement module is used for measuring a data packet of the PDCP according to the PDCP layer measurement control information from the network element at the network side; and the reporting module is used for reporting the measurement result information to the network side network element after the measurement module carries out measurement.
According to the invention, a mode that the network side network element carries out QoS optimization according to the measurement data of the PDCP layer of the terminal is adopted, so that the problem that the QoS requirement of a user cannot be met due to the fact that the QoS parameters and algorithms configured on the network side are not matched with the requirement of the service in the related technology is solved, the QoS quality of a system is improved, and the user experience is improved.
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The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a flow chart of a method of optimizing quality of service according to an embodiment of the invention;
fig. 2 is a block diagram of a network element on the network side according to an embodiment of the present invention;
FIG. 3 is a block diagram of a system for optimizing quality of service according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating a procedure for periodically reporting PDCP measurement results according to a first embodiment of the present invention;
fig. 5 is a flowchart illustrating an event reporting PDCP measurement result according to a second embodiment of the present invention;
fig. 6 is a flowchart illustrating event-triggered measurement and reporting of event-triggered measurement results according to a third embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
According to the embodiment of the invention, a method for optimizing the service quality is provided. Fig. 1 is a flowchart of a method for optimizing quality of service according to an embodiment of the present invention, as shown in fig. 1, the method including the steps of:
step S102, a network side network element sends PDCP layer measurement control information to a terminal;
and step S104, the network element at the network side receives the measurement result information reported after the terminal measures the data packet of the PDCP layer according to the PDCP layer measurement control information, and optimizes the QoS of the network according to the measurement result information.
Through the steps, the network side network element sends the PDCP layer measurement control information to the terminal, and the QoS optimization is carried out according to the measurement data of the PDCP layer reported by the terminal, so that the problem that the QoS requirement of a user cannot be met due to the fact that the QoS parameters and the algorithm configured on the network side are not matched with the requirement of the service in the related technology is solved, the QoS quality of a system is improved, and the user experience is improved.
For example, the network side network element issues a PDCP layer measurement control command, the terminal reports the measurement result after performing PDCP measurement, and the network side network element optimizes the QoS of the network according to the reported measurement result.
Preferably, the network element at the network side can issue PDCP layer measurement control information to the terminal through the first dedicated message of the control plane; the terminal can report the measurement result information through the second special message of the control plane.
For example, in an implementation procedure, the first dedicated message may be a radio resource control connection reconfiguration (RRCConnectionReconfiguration) message, and the second dedicated message may be a measurement report (MeasurementReport) message.
For example, a network element on the network side may issue PDCP layer measurement Control information to a terminal in a Radio Resource Control (RRC) signaling manner; the terminal can also report the measurement result information to the network side network element in the mode of RRC signaling.
Preferably, before step S104, the terminal may determine a measurement mechanism according to the PDCP layer measurement control information, wherein the measurement mechanism includes one of: the periodic reporting of the measurement result information, the reporting of the event trigger measurement result information, the DPCP layer measurement of the terminal and the reporting of the measurement result information are all event triggers; and the terminal measures the data packet of the PDCP layer according to the determined measurement mechanism and reports the measurement result information. For example, the mechanism for the terminal to measure the PDCP layer may employ a method of reporting a measurement result periodically, an event method, an event-triggered measurement, and an event-triggered measurement.
In the implementation process, if the DPCP layer measurement of the terminal is not determined to be event-triggered in the PDCP layer measurement control information, the terminal immediately measures the data packet of the PDCP layer after receiving the PDCP layer measurement control information.
Preferably, the reporting of the measurement result information by the terminal includes: the terminal sends an indication that the terminal has measurement result information to be reported to a network side network element, and when the network side network element requests the terminal to report the measurement result information, the terminal reports the measurement result information to the network side network element; or, under the condition that the terminal cannot determine the mode of reporting the measurement result information from the PDCP layer measurement control information, the terminal automatically determines when to report the measurement result information to the network element on the network side.
Preferably, in step S102, the PDCP layer measurement control information may include at least one of: target measurement quantity, target process of measurement, measurement report information and measurement trigger information.
For example, the terminal may determine the PDCP layer measurement and reporting mode according to the measurement reporting information and the measurement trigger information in the PDCP layer measurement control information received from the network element on the network side.
Preferably, the target measurement quantity may include a performance index of the PDCP packet and/or an identification of the measurement service, where the performance index of the PDCP packet includes at least one of: throughput, packet loss rate, packet delay; the measurement service here refers to an uplink service, and the identifier thereof includes at least one of the following: EPS bearer identification, radio bearer identification, QoS class identifier.
Preferably, before step S104, when the terminal measures the data packet of the PDCP layer, the packet delay may be measured by: firstly, the terminal records the time t1 when a data packet of a PDCP layer reaches the PDCP layer of the terminal and the time t2 when a network element at the network side receives a confirmation message returned to the terminal after the data packet; the terminal then subtracts t1 from t2 to derive the packet delay.
For example, in a Long Term Evolution (LTE) system, the PDCP packet delay measurement method is as follows: the terminal records the arrival time of the PDCP packet and the time when an evolved node B (eNB) returns the packet Acknowledgement (ACK), and then subtracts the former from the latter to delay the PDCP packet to be measured.
Preferably, the target process of the measurement may be a process state in which the terminal is located when the measurement is performed, and includes at least one of the following: switching process, RRC reestablishment process and normal service process. The method is simple to implement and high in operability.
Preferably, the measurement report information may be a period for reporting the measurement result information by the terminal or an event triggering the terminal to report the measurement result information, where the event includes at least one of the following events: and after the preset time passes after the measurement is started, the storage space of the measurement result is larger than a preset threshold, the electric quantity of the terminal is lower than the preset threshold, and the measurement service is ended. Here, the storage space of the measurement result refers to a storage space occupied by the file size of the measurement result after the PDCP measurement is performed by the terminal on the terminal side, and the storage space is usually smaller than a certain limit, that is, when the storage space is larger than the limit, the terminal is triggered to report the measurement result information to the network element on the network side.
In the implementation process, the measurement report information corresponds to different modes, which may be a measurement report period or an event of measurement result report, and the terminal may determine the reporting mode of the measurement result information to be adopted according to the measurement report information. For example, if the measurement report information includes a period, it indicates that measurement result information is reported periodically, and if the measurement report information includes an event, the measurement result information is reported to the network element on the network side after the event is satisfied.
Preferably, the measurement trigger information may be a trigger condition for the terminal to perform PDCP measurement, where the trigger condition includes at least one of: the wireless signal quality is lower than the predetermined threshold, the terminal is in the predetermined area, and the satisfaction degree of the user is lower than the predetermined requirement. In the implementation process, the triggering condition generally refers to a condition (i.e., a triggering event) that the terminal starts performing PDCP measurement, that is, the terminal does not start measuring immediately after receiving PDCP layer measurement control information of the network element on the network side, but starts measuring the PDCP layer after the triggering condition is satisfied.
For example, the measurement trigger information may be one or more of a time when the terminal is triggered to perform a measurement, a radio signal quality below a certain threshold, an arrival at a certain location area, a user satisfaction not meeting a predetermined requirement, and the like.
Preferably, in step S102, the network element on the network side may modify the PDCP layer measurement control information, and send the modified PDCP layer measurement control information to the terminal; or, the network element at the network side carries an identifier indicating that the terminal terminates the measurement target measurement volume in the measurement control information of the PDCP layer.
For example, the network element on the network side may reconfigure or terminate the PDCP layer measurement of the terminal, i.e., modify the content of the PDCP layer measurement control information, or indicate the terminal to terminate the measurement of the PDCP layer in the PDCP layer measurement control information.
Preferably, the measurement result information may include at least one of: a PCDP measurement result, a radio signal quality, service QoS parameter information corresponding to the measured PDCP, measured time information, location information of the terminal, a mobility state of the terminal, and a process state in which the terminal is in measuring. The method can improve the effectiveness of the measurement result information. In implementation, the mobility state of the terminal may be a moving speed level of the terminal, for example, low speed, medium speed, and high speed.
Preferably, in step S104, the optimizing, by the network element on the network side according to the PDCP measurement result, the QoS of the network may include: and the network element at the network side optimizes configuration parameters and/or a radio resource management algorithm of the network according to the PDCP measurement result, wherein the configuration parameters of the network comprise the discarding time of the PDCP data packet. The method can increase the flexibility of the system.
Corresponding to the method, the embodiment of the invention also provides a network element at the network side. Fig. 2 is a block diagram of a network element on a network side according to an embodiment of the present invention, and as shown in fig. 2, the network element 20 on the network side includes: the issuing module 22 is configured to issue PDCP layer measurement control information to the terminal; a receiving module 24, configured to receive measurement result information reported after the terminal measures the data packet of the PDCP layer according to the PDCP layer measurement control information; and a QoS optimization module 26, coupled to the receiving module 24, for optimizing the QoS of the network according to the measurement result information.
By the network element 20 at the network side, the method of issuing the measurement control information of the PDCP layer to the terminal and performing QoS optimization according to the measurement data of the PDCP layer reported by the terminal is adopted, so that the problem that the QoS requirement of a user cannot be met due to inappropriate matching of the QoS parameters and algorithms configured at the network side and the requirement of the service in the related technology is solved, the QoS quality of the system is improved, and the user experience is improved.
Preferably, in the LTE system, the network element 20 on the network side is an eNB; in a Universal Mobile Telecommunications System (UMTS), the network element 20 at the network side is a Radio Network Controller (RNC).
The embodiment of the invention also provides a QoS optimization system. Fig. 3 is a block diagram of a system for optimizing quality of service according to an embodiment of the present invention, and as shown in fig. 3, the system includes a terminal 32 and a network element 20 on the network side, where the terminal 32 includes: a measurement module 322, configured to measure a packet of the PDCP according to the PDCP layer measurement control information from the network element 20 on the network side; and a reporting module 324, coupled to the measuring module 322, configured to report the measurement result information to the network element 20 after the measuring module 322 performs the measurement.
The implementation of the above embodiments will be described in detail below with reference to the preferred embodiments and the accompanying drawings.
Example one
This embodiment provides an optimization method of QoS by taking periodic measurement reporting on the terminal side as an example. It is assumed that the measured services in this embodiment are all uplink services, the terminal is in a link state in the network element 1 (e.g., eNB or RNC), and the cell of the network element 1 provides services for the terminal.
Fig. 4 is a schematic flowchart of a procedure of periodically reporting PDCP measurement results according to a first embodiment of the present invention, as shown in fig. 4, the procedure includes the following steps:
step S402, based on QoS optimization or other requirements, the network element 1 issues PDCP layer measurement control information to the terminal. The measurement control information may include one or more of a target measurement quantity to be measured, a target process to be measured, measurement report information, and the like. In the implementation process, the target measurement quantity may include a measurement quantity of a specific PDCP protocol layer (for example, one or more of indexes such as throughput, packet loss rate, packet delay, and the like of a PDCP packet), and may further include an identifier of a service to be measured, where the identifier may be an EPS bearer id, an RB id, or a QCI, or does not carry a service identifier, and it is determined by default that all services of the terminal are measured; the target measurement process may be a process state of the terminal performing the measurement, for example, the terminal is in a handover process, an RRC reestablishment process, a normal service process, and the like; the measurement report information may be a reporting mode of the measurement result of the terminal, for example, if the measurement report information is periodically reported, the measurement report information includes a period for reporting the measurement result.
Preferably, the network element 1 may issue the measurement control information to the terminal through a control plane dedicated message in an RRC signaling manner. For example, a radio resource control connection reconfiguration (RRCConnectionReconfiguration) message or a new stand-alone message is used.
Step S404, the terminal immediately measures the data packet of the PDCP layer according to the received measurement control information. For example, the target measurement quantity is throughput of PDCP packets, packet loss rate, packet delay, and the like. The terminal can measure the target measurement quantity according to the measurement requirement. The throughput may be calculated as follows: the PDCP layer of the terminal sends the number of packets in a certain period; the packet loss rate may be calculated by: the ratio of the number of packets sent by the terminal without receiving an acknowledgement ack (acknowledge) to the total number of packets sent; the packet delay may be measured in the following manner: the terminal records the arrival time of the uplink PDCP packet, and the time when an opposite network element (e.g., eNB) receives the PDCP packet and returns an acknowledgement ACK, where the time difference between the two times is the delay time of the PDCP packet (i.e., the delay time of the PDCP packet is the time when the eNB returns the ACK of the packet — the arrival time of the terminal PDCP packet), where the arrival time of the terminal PDCP packet refers to the time when the data packet of the application layer arrives at the terminal PDCP layer.
Preferably, the terminal may record the measurement result of each PDCP packet, and may also perform an arithmetic average in a measurement period, that is, calculate an average throughput, an average packet loss rate, and an average delay time of all PDCP packets in a measurement period. The measurement period may be included in the measurement control information.
Preferably, the terminal simultaneously performs the measurement of the radio quality of the serving cell, and may also perform the measurement of the geographical location information of the terminal.
Step S406, the terminal periodically reports the measurement result of the PDCP layer obtained by the measurement to the network element at the network side. In the implementation process, a User Equipment (User Equipment, abbreviated as UE) may report the PDCP layer measurement result to the network element 1 by using an RRC signaling, for example, a measurement report (measurement report) message or a new independent message may be used. Preferably, the measurement result may include one or more of information such as wireless signal quality, QoS parameter information, time information, location information, mobility status, and a procedure in which the terminal is located. The radio signal Quality may be a pilot signal Quality of a cell or a Channel Quality Indicator (CQI for short); the QoS parameter information may be a service QoS parameter corresponding to the measured PDCP (for example, the QoS parameter includes QCI and rate information, and may also include Address Resolution Protocol (ARP)); the time information may be an absolute time or a relative time of measurement; the location information may include a geographic location where the terminal is located; the mobility state may be a moving speed level (e.g., low speed, medium speed, high speed) of the terminal; the process of the terminal may refer to a handover process, an RRC reestablishment process, a normal service process, and the like.
Preferably, the network element 1 may reconfigure or terminate the measurement of PDCP. For example, the network element 1 may modify the target measurement quantity, the measured target process, the measurement report information, or stop some or all of the measurement quantities. The network element 1 sends the measurement reconfiguration information to the terminal, and the terminal performs measurement or terminates measurement according to the measurement reconfiguration information.
By the method, the terminal can measure the PDCP layer according to the measurement requirement issued by the network side network element and report the measurement result to the network side network element; the network element at the network side can perform network optimization according to the measurement result of the PDCP layer reported by the terminal, thereby improving the QoS of the user. Preferably, the network optimization may include optimization of network configuration parameters and optimization of a radio resource management algorithm, for example, a discard time parameter DiscardTimer of PDCP data packets may be optimized.
Example two
This embodiment provides an optimized QoS scheme by taking event-triggered measurement reporting as an example. It is assumed that the measured services in this embodiment are all uplink services, the terminal is in a link state in the network element 1, and the cell of the network element 1 provides services for the terminal.
Fig. 5 is a schematic diagram of a process for reporting a PDCP measurement result according to a second embodiment of the present invention, and as shown in fig. 5, the process includes the following steps:
step S502, based on QoS optimization or other requirements, the network element 1 issues PDCP layer measurement control information to the terminal. The measurement control information includes a target measurement quantity to be measured, and may further include one or more of a target process to be measured, measurement report information, and the like. The target measurement quantity includes a measurement quantity of a specific PDCP protocol layer, which refers to one or more of indexes such as throughput, packet loss rate, packet delay, and the like of a PDCP packet, and may further include an identifier of a service to be measured, where the identifier may be an EPSbearer id, an RB id, or a QCI, or does not carry a service identifier, and the default is to measure all services of the terminal. The target measurement process refers to a process state of the terminal performing the measurement, for example, the terminal is in a handover process, an RRC reestablishment process, a normal service process, and the like. The measurement report information refers to a report condition of a measurement result of the terminal, for example, if the measurement report information is reported in an event mode, the measurement report information may be that one or more of measurement report events, such as that the throughput of a PDCP packet in a certain period is higher than a certain threshold (for example, 5kbits), the packet loss rate is higher than a certain threshold (for example, the threshold is 1%), the delay is greater than a certain threshold (for example, the threshold is 5ms), and the quality of a radio signal is lower than a certain threshold (for example, the threshold is-85 dbm), are satisfied, and then the reporting of the PDCP measurement result of the terminal is triggered.
Preferably, the network element 1 may issue the measurement control information to the terminal through a control plane dedicated message in an RRC signaling manner, for example, using a radio resource control connection reconfiguration (RRCConnectionReconfiguration) message or a new independent message.
Step S504, the terminal immediately measures the data packet of the PDCP layer according to the received measurement control information. The measurement mode of the packet delay is as follows: the terminal records the arrival time of an uplink PDCP packet and the time when an opposite terminal network element 1 (for example, eNB) receives the PDCP packet and returns an acknowledgement ACK, wherein the time difference between the two times is the delay time of the PDCP packet, namely (the time when the eNB returns the ACK packet-the arrival time of the terminal PDCP packet), and the arrival time of the terminal PDCP packet refers to the time when a data packet of an application layer arrives at a terminal PDCP layer; the terminal can measure the throughput and the packet loss rate of the PDCP packet according to the measurement requirement. Calculation of throughput: (the number of transmission packets in a certain period of the PDCP layer of the terminal); calculating the packet loss rate: (ratio of the number of packets sent by the terminal without receiving ACK to the total number of packets sent).
Preferably, the terminal may record the measurement result of each PDCP packet, and may also perform an arithmetic average in a measurement period, that is, calculate an average delay time, an average throughput, and an average packet loss rate of all PDCP packets in a measurement period. The measurement period may be included in the measurement control information. The terminal simultaneously measures the wireless quality of the serving cell, and can also measure the geographic position information of the terminal.
Step S506, the reporting conditions of the measurement results are met. For example, the throughput of PDCP packets in a certain period is already higher than a certain threshold (e.g., 5kbits), the packet loss rate is already higher than a certain threshold (e.g., 1%) the delay is already greater than a certain threshold (e.g., 5ms), the radio signal quality is already lower than a certain threshold (e.g., -85dbm), and so on.
Step S508, if the condition for reporting the measuring result is satisfied, the terminal reports the measuring result of the PDCP layer obtained by the measurement to the network side, and the network side performs network optimization according to the PDCP measuring result reported by the terminal, thereby improving the QoS of the user. In the implementation process, the UE may report the PDCP layer measurement result to the network element 1 by using an RRC signaling, for example, a measurement report (MeasurementReport) message or a new independent message may be used. Preferably, the measurement result may further include one or more of information such as wireless signal quality, QoS parameter information, time information, location information, mobility state, and a procedure in which the terminal is located. Wherein, the wireless signal quality can be the pilot signal quality of the cell or the channel quality indicator CQI; the QoS parameter information refers to a service QoS parameter corresponding to the measured PDCP, and the QoS parameter comprises QCI and rate information and can also contain ARP; the time information may be an absolute time or a relative time of measurement; the position information comprises the geographic position of the terminal; the mobility state may be a moving speed level of the terminal, for example, low speed, medium speed, high speed; the process of the terminal may refer to a handover process, an RRC reestablishment process, a normal service process, and the like.
Preferably, the network element 1 may reconfigure or terminate the measurement of PDCP. For example, the target measurement quantity, the measured target process, the measurement report information may be modified, or some or all of the measurement quantities may be stopped. The network element 1 sends the measurement reconfiguration information to the terminal, and the terminal performs measurement or terminates measurement according to the measurement reconfiguration information.
Preferably, the network optimization may include optimization of network configuration parameters and optimization of a radio resource management algorithm, for example, a discard time parameter DiscardTimer of PDCP data packet may be optimized.
EXAMPLE III
In this embodiment, for example, both the measurement start of the PDCP layer and the reporting of the measurement result are triggered by an event, a QoS optimization scheme is provided.
Fig. 6 is a schematic diagram of a process of event triggered measurement and reporting of an event triggered measurement result according to a third embodiment of the present invention, as shown in fig. 6, a terminal is in a link state in a network element 1, and the network element 1 provides a service for the terminal, where the process includes the following steps:
step S602, based on QoS optimization or other requirements, the network element 1 issues PDCP layer measurement control information to the terminal. The measurement control information includes a target measurement quantity to be measured, and may further include one or more of a target process to be measured, measurement trigger information, measurement report information, and the like. The target measurement quantity may include a measurement quantity of a specific PDCP protocol layer, for example, one or more of indexes such as throughput, packet loss rate, packet delay, and the like of a PDCP packet, and the target measurement quantity may further include an identifier of a service to be measured, where the identifier may be an EPS bearer id, an RB id, or a QCI, or does not carry a service identifier, and it is determined by default that all services of the terminal are measured. The target measurement process refers to a process state of the terminal performing the measurement, for example, the terminal is in a handover process, an RRC reestablishment process, a normal service process, and the like. The measurement trigger information refers to a trigger condition (which may be denoted as event 1) of PDCP measurement, and may be, for example, one or more of a radio signal quality below a certain threshold (e.g., -75dbm), arrival of the terminal at a certain location area (e.g., TA1), a user's satisfaction not meeting a requirement, and the like. The measurement report information refers to a condition (which may be denoted as an event 2) for triggering the terminal to report the measurement result, and may be, for example, one or more of a certain time (for example, 100s) after the measurement is started, the size of the storage space of the measurement result is greater than a certain threshold (for example, 50%), the power of the terminal is lower than the certain threshold (that is, the threshold is, for example, 1%), the measured service is ended, and the like.
Preferably, the network element 1 may issue the measurement control information to the terminal through a control plane dedicated message in an RRC signaling manner, for example, using a radio resource control connection reconfiguration (RRCConnectionReconfiguration) message or a new independent message.
Step S604, the terminal measures the data packet of the PDCP layer according to the received measurement control information if event 1 triggered by the PDCP measurement is satisfied. The packet delay may be measured in the following manner: the terminal records the arrival time of an uplink PDCP packet and the time when the opposite terminal network element 1 receives the PDCP packet and returns an acknowledgement ACK, wherein the time difference between the two times is the delay time of the PDCP packet, namely (the time when the network element 1 returns the packet ACK-the arrival time of the terminal PDCP packet), and the arrival time of the terminal PDCP packet refers to the time when the data packet of the application layer arrives at the PDCP layer of the terminal; the terminal can measure the throughput and the packet loss rate of the PDCP packet according to the measurement requirement. For example, the calculation of throughput: (the number of transmission packets in a certain period of the PDCP layer of the terminal); calculating the packet loss rate: (ratio of the number of packets sent by the terminal without receiving ACK to the total number of packets sent).
Preferably, the terminal may record the measurement result of each PDCP packet, and may also perform an arithmetic average in a measurement period, that is, calculate an average delay time, an average throughput, and an average packet loss rate of all PDCP packets in a measurement period. The measurement period may be included in the measurement control information.
Preferably, the terminal simultaneously performs the measurement of the radio quality of the serving cell, and may also perform the measurement of the geographical location information of the terminal.
Step S606, an event 2 reported by the measurement result occurs. In the implementation process, if the triggering condition issued by the network side is that the satisfaction of the user does not meet the requirement, the terminal can judge whether the service meets the requirement of the user according to the indication of the application layer, that is, whether the satisfaction of the user meets the requirement is determined through the application layer.
Step S612, if the event 2 of reporting the measurement result is satisfied, the terminal reports the measurement result of the PDCP layer obtained by the measurement to the network side. In the implementation process, the UE may report the PDCP layer measurement result to the network element 1 by using an RRC signaling, for example, a measurement report (MeasurementReport) message or a new independent message may be used. The measurement result may further include one or more of information such as wireless signal quality, QoS parameter information, time information, location information, mobility status, and a procedure in which the terminal is located. The wireless signal quality can be the pilot signal quality of a cell or a Channel Quality Indicator (CQI); the QoS parameter information refers to a service QoS parameter corresponding to the measured PDCP, for example, the QoS parameter includes QCI and rate information, and may further include ARP; the time information may be an absolute time or a relative time of measurement; the position information comprises the geographic position of the terminal; the mobility state may be a moving speed level of the terminal, for example, low speed, medium speed, high speed; the process of the terminal may refer to a handover process, an RRC reestablishment process, a normal service process, and the like.
It should be noted that, in the implementation process, if the measurement control information issued by the network side does not include measurement report information, the terminal may also determine when to report the measurement result by itself.
Preferably, the process may further include step S608 and step S610, that is, before reporting the PDCP measurement result, the terminal may send an indication that the measurement result needs to be reported to the network element 1, and after the network element 1 sends a message of a measurement result reporting request to the terminal, the terminal reports the PDCP measurement result to the network element 1. In the implementation process, if the measurement control information issued by the network side does not include measurement report information, the terminal can also automatically determine when to report an indication that a measurement result can be reported.
Preferably, the network element 1 may reconfigure or terminate the measurement of PDCP. For example, the network element 1 may modify the target measurement quantity, the measured target process, the measurement report information, or stop some or all of the measurement quantities. The network element 1 sends the measurement reconfiguration information to the terminal, and the terminal performs measurement or terminates measurement according to the measurement reconfiguration information.
In this embodiment, the network side can perform network optimization according to the PDCP measurement result reported by the terminal, thereby improving the QoS of the user. Preferably, the network optimization may include optimization of network configuration parameters and optimization of a radio resource management algorithm, for example, a discard time parameter DiscardTimer of PDCP data packet may be optimized.
It should be noted that the measured traffic in the above embodiments is all uplink traffic. Network element 1, in an LTE system, refers to an eNB; in the UMTS system, it refers to RNC.
In summary, in order to meet the QoS requirement of the user and fully utilize the network resources, the embodiment of the present invention provides a scheme for measuring the user plane data in the PDCP layer, and the network side can optimize the QoS according to the measurement result reported by the terminal, thereby improving the QoS quality of the system. Meanwhile, network resources are fully utilized, and better user experience is provided for users.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, or they may be separately fabricated into various integrated circuit modules, or multiple modules or steps thereof may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (16)
1. A method for optimizing quality of service (QoS), comprising the steps of:
a network element at a network side issues measurement control information of a packet data convergence protocol PDCP layer to a terminal;
and the network side network element receives measurement result information reported after the terminal measures the data packet of the PDCP layer according to the PDCP layer measurement control information, and optimizes the QoS of the network according to the measurement result information.
2. The method of claim 1, wherein the network element at the network side issues the PDCP layer measurement control information to the terminal through a control plane first dedicated message; and the terminal reports the measurement result information through a second special message of the control plane.
3. The method of claim 1, wherein before the network element on the network side receives the measurement result information reported by the terminal, the method further comprises:
the terminal determines a measurement mechanism according to the PDCP layer measurement control information, wherein the measurement mechanism comprises one of the following: the periodical reporting of the measurement result information, the event triggering of the reporting of the measurement result information, the DPCP layer measurement of the terminal and the reporting of the measurement result information are all event triggering;
and the terminal measures the data packet of the PDCP layer according to the determined measuring mechanism and reports the measuring result information.
4. The method of claim 3, wherein reporting, by the terminal, the measurement result information comprises:
the terminal sends an indication that the terminal has the measurement result information to be reported to the network side network element, and when the network side network element requests the terminal to report the measurement result information, the terminal reports the measurement result information to the network side network element; or,
and under the condition that the terminal cannot determine the mode of reporting the measurement result information from the PDCP layer measurement control information, the terminal automatically determines when to report the measurement result information to the network side network element.
5. The method of claim 1, wherein the PDCP layer measurement control information comprises at least one of: target measurement quantity, target process of measurement, measurement report information and measurement trigger information.
6. The method of claim 5, wherein the target measurement quantity comprises a performance indicator of the PDCP packet and/or an identification of a measurement service, wherein,
the performance index of the PDCP packet includes at least one of: throughput, packet loss rate, packet delay;
the measurement service is an uplink service, and the identifier of the measurement service comprises at least one of the following: evolved packet system EPS bearer identification, radio bearer identification, QoS class identifier.
7. The method of claim 6, wherein before the network element at the network side receives the measurement result information reported by the terminal, when the terminal measures a data packet of the PDCP layer, the packet delay is measured in the following manner:
the terminal records the time t of the data packet of the PDCP layer reaching the PDCP layer of the terminal1And the time t of the confirmation message returned to the terminal after the network side network element receives the data packet2；
The terminal passes t2Minus t1And obtaining the packet delay.
8. The method according to claim 5, wherein the target process of the measurement is a process state of the terminal when the measurement is performed, and the process state includes at least one of: switching process, radio resource control RRC reestablishment process and normal service process.
9. The method of claim 5, wherein the measurement report information is a period for the terminal to report the measurement result information or an event triggering the terminal to report the measurement result information, and wherein the event includes at least one of: and after the preset time passes after the measurement is started, the storage space of the measurement result is larger than a preset threshold, the electric quantity of the terminal is lower than the preset threshold, and the measurement service is ended.
10. The method of claim 5, wherein the measurement trigger information is a trigger condition for the terminal to perform PDCP measurement, and wherein the trigger condition comprises at least one of: the quality of the wireless signal is lower than a preset threshold, the terminal is in a preset area, and the satisfaction degree of a user is lower than a preset requirement.
11. The method of claim 5, wherein the network element at the network side issuing the PDCP layer measurement control information to the terminal comprises:
the network side network element modifies the PDCP layer measurement control information and sends the modified PDCP layer measurement control information to the terminal; or,
and the network element at the network side carries an identifier for indicating the terminal to terminate the measurement of the target measurement quantity in the PDCP layer measurement control information.
12. The method of claim 1, wherein the measurement result information comprises at least one of: a PCDP measurement result, a radio signal quality, service QoS parameter information corresponding to the measured PDCP, measured time information, location information of the terminal, a mobility state of the terminal, and a process state in which the terminal is in measuring.
13. The method of any of claims 1 to 12, wherein the network element optimizing the QoS of the network according to the PDCP measurement result comprises:
and the network side network element optimizes configuration parameters and/or a radio resource management algorithm of the network according to the PDCP measurement result, wherein the configuration parameters of the network comprise the discarding time of the PDCP data packet.
14. A network side network element, comprising:
the issuing module is used for issuing the measurement control information of the PDCP layer to the terminal;
a receiving module, configured to receive measurement result information reported after the terminal measures a data packet of the PDCP layer according to the PDCP layer measurement control information; and the QoS optimization module is used for optimizing the QoS of the network according to the measurement result information.
15. The network element on the network side of claim 14, wherein in a long term evolution LTE system, the network element on the network side is an evolved node b, eNB; in the UMTS, the network element on the network side is a radio network controller RNC.
16. A system for optimizing quality of service (QoS), comprising a terminal and the network element of claim 14 or 15, wherein,
the terminal includes: a measurement module, configured to measure a data packet of a PDCP according to the PDCP layer measurement control information from the network element on the network side; and a reporting module, configured to report the measurement result information to the network side network element after the measurement module performs measurement.
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| CN201110084214.8A CN102740379B (en) | 2011-04-02 | The optimization method of service quality and system, network side element | |
| PCT/CN2011/083321 WO2012136067A1 (en) | 2011-04-02 | 2011-12-01 | Quality of service optimization method and system, and network-side network element |
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