WO2014040283A1 - Procédé et dispositif de commutation de réseau, station de base et contrôleur de station de base - Google Patents

Procédé et dispositif de commutation de réseau, station de base et contrôleur de station de base Download PDF

Info

Publication number
WO2014040283A1
WO2014040283A1 PCT/CN2012/081437 CN2012081437W WO2014040283A1 WO 2014040283 A1 WO2014040283 A1 WO 2014040283A1 CN 2012081437 W CN2012081437 W CN 2012081437W WO 2014040283 A1 WO2014040283 A1 WO 2014040283A1
Authority
WO
WIPO (PCT)
Prior art keywords
network
service
type
remaining capacity
bandwidth
Prior art date
Application number
PCT/CN2012/081437
Other languages
English (en)
Chinese (zh)
Inventor
潘甦
舒文江
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201280001816.5A priority Critical patent/CN103109564B/zh
Priority to PCT/CN2012/081437 priority patent/WO2014040283A1/fr
Publication of WO2014040283A1 publication Critical patent/WO2014040283A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • H04W36/365—Reselection control by user or terminal equipment by manual user interaction

Definitions

  • the present invention relates to communications technologies, and in particular, to a method and apparatus for network handover, a base station, and a base station controller. Background technique
  • Each access technology uses a unique access model and a radio resource management strategy. This separate operation mode is not conducive to increasingly tight radio resources (such as frequency bandwidth). Make full use of it.
  • CRRM CR Management
  • CRRM can improve the performance of the entire heterogeneous network through optimized resource management.
  • the application network environment of the CRRM is: a) multiple different access networks are jointly covered in the same area; b) each radio access network (such as the Radio Access Network, referred to as RAN) has optimized radio resource management. (Radio Resource Management, RRM for short); c) Multi-mode terminal capable of accessing multiple radio access networks and access technologies, modes, and cells.
  • RRM Radio Resource Management
  • a resource pool may contain multiple access technologies, such as Global System for Mobile Communication (GSM) and Wideband Code Division Multiple Access (WCDMA). Long Term Evolution (LTE), etc., the CRRM guides users to access the most suitable resource pool in the ideal link mode.
  • GSM Global System for Mobile Communication
  • WCDMA Wideband Code Division Multiple Access
  • LTE Long Term Evolution
  • the target base station controller (BSC) or the radio network controller (RNC) receives the handover or relocation request message
  • the remaining resources of the target cell are first and current. If the remaining resources of the serving cell are compared, if the remaining resources of the target cell are large, the handover is allowed, otherwise it is rejected. That is to say, the current selection of networks for the purpose of capacity balancing can bring about the benefits of making full use of network capacity, but the above techniques have the following disadvantages:
  • the remaining capacity of different networks (system capacity minus the capacity already occupied by users) is incomparable; specifically, because the wireless resources of different networks are expressed differently, the remaining capacity cannot be directly compared.
  • GSM is time division multiple access, so its remaining capacity is how many time slots remain.
  • LTE is orthogonal frequency division multiple access, so its remaining capacity is how many subcarriers remain. From this point of view, LTE and GSM cannot directly compare the remaining capacity.
  • the network is only selected by the remaining capacity, resulting in unreasonable allocation of network resources and low utilization of network resources, which may easily cause a problem of a large call blocking rate in a service with poor access capability (such as a streaming service).
  • the embodiments of the present invention provide a method and a device for network handover, a base station, and a base station controller, which are used to solve the problem that the network resource allocation in the prior art is unreasonable and the network resource utilization rate is low.
  • an embodiment of the present invention provides a method for network switching, including:
  • the network handover request includes: an identifier of the current service of the terminal;
  • the relative remaining capacity is the ratio of the remaining capacity represented by the equivalent spectral bandwidth of each of the two or more networks to the total spectral bandwidth of the network.
  • the foregoing method for network switching further includes: if the network matching the service feature is selected as one, the selected network is switched by the terminal Target network.
  • the method for network handover further includes: sending a network handover response to the terminal, where the network handover response includes an identifier of the selected target network.
  • the service feature includes:
  • the selecting, in the two or more networks, a network with poor applicability and/or a relatively large remaining capacity is used as the terminal switching.
  • the target network Before the steps of the target network, it also includes:
  • the selecting, in the two or more networks, a network with poor applicability and/or a relatively large remaining capacity is used as the terminal switching
  • the process of the target network including:
  • the network corresponding to the minimum ⁇ is selected as the target network for the terminal handover;
  • RJ represents the preset network applicability parameter
  • ⁇ represents the total spectrum bandwidth in the network corresponding to ⁇
  • ⁇ represents the remaining capacity of the network corresponding to R J
  • the two or more networks include: an LTE system, a GSM system, and a WCDMA system;
  • Equation (3) acquires an equivalent spectral bandwidth in the GSM; and acquires a remaining capacity in the GSM system according to the following formula (4);
  • Equation (3) acquires an equivalent spectral bandwidth in the WCDMA system according to the following formula (5); and acquiring a remaining capacity in the WCDMA system according to the following formula (6);
  • Formula (2) ⁇ ⁇ - ⁇ ⁇ ⁇ , -K_K N A *d
  • ⁇ denotes the preset subcarrier bandwidth
  • the activation factor of the class service denotes the total preset in the LTE system
  • C denotes the total preset in the LTE system
  • the number of subcarriers, trou indicates the preset ⁇ , the rate of the “user” in the class service
  • ⁇ denotes the measured ⁇
  • ⁇ 2 represents the measured noise power
  • ⁇ represents the acquired ⁇
  • the "average user average power” in the class service indicating the calculation acquisition
  • the number of subcarriers allocated to the wth user in the ⁇ class service is a coefficient, ⁇ «-1.5/ ⁇ (55 ⁇ ).
  • ⁇ indicates the system capacity preset in the LTE system
  • the NNN indicates the number of users having the session type service, the interactive type service, the flow type service, and the background type service in the LTE system, respectively
  • ⁇ ⁇ 2 and d ⁇ 4 respectively represent The equivalent bandwidth of the session type service, the interaction type service, the flow type service, and the background type service in the LTE system
  • ⁇ represents the total spectrum bandwidth preset in the WCDMA system
  • NN 2 and N represent the number of users of the session type service, the interaction type service, and the background type service in the WCDMA system
  • d ⁇ 2 respectively Indicates the equivalent spectrum bandwidth of the session-type service, the interactive-type service, and the background-type service in the WCDMA system.
  • an embodiment of the present invention provides a device for network switching, including:
  • a receiving unit configured to receive a network switching request sent by the terminal, where the network switching request includes: an identifier of a current service of the terminal;
  • a selecting unit configured to determine, according to the identifier, a service feature of the current service, and select two or more networks that match the service feature
  • a target network selecting unit configured to select a network with poor applicability and/or a relatively large remaining capacity in the two or more networks as a target network for the terminal handover;
  • the relative remaining capacity is the ratio of the remaining capacity represented by the equivalent spectral bandwidth of each of the two or more networks to the total spectral bandwidth of the network.
  • the target network selecting unit is further combined with the second aspect and the foregoing possible implementation manner, in the second possible implementation manner, the foregoing apparatus for network switching further includes:
  • a sending unit configured to send a network switch response to the terminal, where the network switch response includes an identifier of the selected target network.
  • the service feature includes:
  • the foregoing apparatus for network switching further includes: an acquiring unit, configured to acquire a remaining capacity of each of the two or more networks, and The equivalent spectrum bandwidth occupied by the terminal in the two or more networks.
  • the target network selecting unit is specifically used to
  • the network corresponding to the minimum ⁇ is selected as the target network of the terminal switching
  • ⁇ belong to (' ⁇ , ⁇ ) e ⁇ i), (i, 2), (i, 3 ), ( 2 , 2 ), ( 2 , 3 ), ( 3 , 3 ), ( 4 , 2 )
  • the parameter in ( 4 , 3 ) ⁇ indicates the preset network applicability parameter
  • ⁇ indicates the total spectrum bandwidth in the network corresponding to ⁇
  • ⁇ indicates the remaining capacity of the network corresponding to R J
  • " indicates the relative remaining capacity
  • the constant of the weight of the business feature
  • the two or more networks include: an LTE system, a GSM system, and a WCDMA system;
  • the acquiring unit is specifically used to calculate the distance between the two acquiring units. Then, the acquiring unit is specifically used to calculate the distance between the two acquiring units.
  • Equation (3) acquires an equivalent spectrum bandwidth in the GSM; and acquires a remaining capacity in the GSM system according to the following formula (4); for the WCDMA system, acquires the WCDMA system according to the following formula (5) The equivalent spectral bandwidth; and obtaining the remaining capacity in the WCDMA system according to the following formula (6); Formula 1 )
  • Equation (2) 2 W 2 - N d l - N 2 'd 2 - N 3 'd 3 - N 4 'd 4 ⁇
  • C indicates the total number of subcarriers preset in the LTE system
  • ? indicates the preset ⁇ , the rate of the “user” in the class service
  • ⁇ 3 ⁇ 4 denotes the measured ⁇ , the channel gain of the “user” on the first subcarrier in the class service, ⁇ 2 represents the measured noise power, ⁇ represents the acquired ⁇ , the “average user average power” in the class service, Calculating the obtained number of subcarriers allocated to the wth user in the service, as a coefficient, ⁇ «-1.5/ ⁇ (55 ⁇ ).
  • ⁇ indicates the system capacity preset in the LTE system
  • NNN indicates The number of users of the session type service, the interaction type service, the flow type service, and the background type service in the LTE system, ⁇ ⁇ 2 and d ⁇ 4 respectively represent the session type service, the interaction type service, the flow type service, and the background in the LTE system.
  • ⁇ represents the equivalent spectral bandwidth of the session-type service in the GSM system. Representing the total spectrum bandwidth preset in the GSM system, indicating the number of users who already have session-type services in the GSM system;
  • ⁇ represents the total spectrum bandwidth preset in the WCDMA system, N, N 2 , N
  • the number of users of the session type service, the interaction type service, and the background type service in the WCDMA system, d ⁇ 2 respectively represent the equivalent spectrum bandwidth of the session type service, the interaction type service, and the background type service in the WCDMA system.
  • an embodiment of the present invention provides a base station, including the apparatus for network switching according to any one of the foregoing.
  • an embodiment of the present invention provides a base station controller, including the apparatus for network switching according to any one of the foregoing.
  • the method and device for network handover, the base station, and the base station controller determine the service characteristics of the current service according to the identifier of the current service of the terminal, and then select two or more networks that match the service characteristics. Further, the network with poor applicability and/or relatively large remaining capacity is selected as the target network switched by the terminal to achieve reasonable allocation of heterogeneous network resources, improve utilization of heterogeneous network resources, and reduce terminal services. Call blocking rate.
  • FIG. 1 is a schematic flowchart of a method for network switching according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a method for network handover according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a method for network handover according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of TDMA in a GSM system according to an embodiment of the present invention
  • Schematic diagram of the system access mode
  • 5A is a relationship diagram of equivalent bandwidth and average power of a session type service in an LTE system according to an embodiment of the present invention
  • FIG. 5B is a diagram showing a relationship between equivalent bandwidth and average power of an interactive service in an LTE system according to an embodiment of the present invention.
  • FIG. 5C is an equivalent bandwidth and peace of a flow service in an LTE system according to an embodiment of the present invention. Relationship diagram of average power
  • FIG. 5D is a diagram showing a relationship between equivalent bandwidth and average power of a background type service in an LTE system according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of a network applicable to various types of services according to an embodiment of the present invention
  • FIG. 7A is a simulation diagram of a call blocking rate of a session type service in a heterogeneous network according to an embodiment of the present invention
  • FIG. 7B is a simulation diagram of a call blocking rate of an interactive service in a heterogeneous network according to an embodiment of the present invention.
  • 7C is a simulation diagram of a call blocking rate of a flow service in a heterogeneous network according to an embodiment of the present invention.
  • 7D is a simulation diagram of a call blocking rate of a background type service in a heterogeneous network according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a network switching apparatus according to an embodiment of the present invention
  • FIG. 9A is a schematic structural diagram of a network switching apparatus according to an embodiment of the present invention
  • FIG. 9B is a schematic structural diagram of a network switching apparatus according to an embodiment of the present invention.
  • the user in any of the following embodiments refers to a user terminal, and the embodiment of the present invention replaces the user terminal with a user for convenience of description.
  • Session services can be connected to GSM systems, WCDMA systems, and LTE systems. This is called strong access capability; It is possible to access the LTE system, but it is not suitable for accessing the GSM system, which is called weak access capability.
  • the interactive service can access the WCDMA system and the LTE system, and the background service can access the WCDMA system and the LTE system. Therefore, the access capability of the interactive service and the background service is the same, and the access capability is generally called.
  • the GSM system has the most single bearer service and is only suitable for accessing session-type services. It is called network poorly applicable.
  • the LTE bearer service is the most abundant and can support all services. It is called network adaptability. Therefore, the session service can be connected to the GSM system first. If the session service also accesses the LTE system in a large amount, the video service belonging to the stream service may face insufficient network resources. At this time, there may be remaining capacity in the GSM system. However, since the GSM system is not suitable for accessing video, the above video service cannot access the network.
  • the remaining capacity of each network is unmatched. Further, the existing algorithms do not consider service characteristics, resulting in a problem of large call blocking rate and low resource utilization rate of the network.
  • the current CRRM does not include the business characteristics in the calculation range when selecting the network.
  • the network is selected by the two factors of the integrated service feature and the remaining capacity of the network.
  • the time slots, code channels, and orthogonal carriers (OFDMA of the LTE system) occupied by the services in the GSM system, the WCDMA system, and the LTE system are mapped to equivalent spectrum bandwidths (hereinafter referred to as equivalent bandwidths), and the remaining capacity is unified.
  • the remaining equivalent spectrum bandwidth ie, the remaining capacity is the total spectrum bandwidth in the system (hereinafter referred to as the system bandwidth) minus the equivalent spectrum bandwidth occupied by the accessed users), so that the remaining capacity between different systems can be compared.
  • the characteristics of the services that can be accessed by different types of services are different. Therefore, the service features are classified into four types, including: session-type service features, interaction-type service features, flow-type service features, and background services. feature.
  • FIG. 1 is a schematic flowchart of a method for network switching according to an embodiment of the present invention. As shown in FIG. 1, the method for network switching in this embodiment is as follows.
  • the network switch request sent by the terminal is received, where the network switch request includes: an identifier of the current service of the terminal.
  • the identifier of the current service of the terminal is recognized by both the terminal and the base station.
  • the service features in this embodiment include: a session type service feature, an interaction class service feature, a flow class service feature, and a background class service feature.
  • the current session type service is applicable to the GSM system, the WCDMA system, the LTE system, etc.; the interactive service and the background service are applicable to the WCDMA system and the LTE system; and the flow service is applicable to the LTE system.
  • step 103 may be to select a network with poor applicability in two or more networks and a relatively large remaining capacity as a target network for terminal handover.
  • step 103 may also be to select a network with poor applicability in two or more networks as the target network for terminal handover.
  • a large number of networks serve as the target network for terminal handover.
  • step 103 does not limit the specific implementation manner of step 103, and may be based on actual conditions. Choose Execute.
  • the above network switching method when selecting a network, considers the relative remaining capacity of each network in the heterogeneous network on the one hand, and considers the types of services that each network can support on the other hand, so that the above services are first selected in the service.
  • the method for the network handover further includes: if the network matching the service feature is selected. Further, as shown in FIG. 2, the method for network switching includes the following step 104.
  • the identifier of a certain network can be understood as the parameter value corresponding to the network.
  • the parameter j 2.
  • the identifier of the network is recognized by the terminal, the base station, and the base station controller.
  • the identifier of the above network may be encoded by each network and broadcast to the terminal in its broadcast channel.
  • the identifier of the above network may also be other symbols or codes that can uniquely represent the network, which is not limited in this embodiment.
  • the method for network switching in this embodiment determines the service feature of the current service according to the identifier of the current service of the terminal, and then selects two or more networks that match the service feature, and further selects two or more networks.
  • the network with poor performance and/or large residual capacity serves as the target network for the terminal to switch, realizes the reasonable allocation of the heterogeneous network resources, improves the utilization of the heterogeneous network resources, and reduces the call blocking rate of the terminal services.
  • FIG. 3 is a schematic flowchart diagram of a method for network switching according to another embodiment of the present invention. As shown in FIG. 3, the steps of the method for network switching in this embodiment are as follows.
  • 301 Receive a network switch request sent by the terminal, where the network switch request includes: an identifier of the current service of the terminal.
  • 302. Determine, according to the identifier, a service feature of the current service, and select two or more networks that match the service feature.
  • the network corresponding to the minimum ⁇ / ⁇ is selected as the target network of the terminal handover according to ⁇ .
  • ⁇ belong to (' ⁇ , ⁇ ) e ⁇ i), (i, 2), (i, 3 ), ( 2 , 2 ), ( 2 , 3 ), ( 3 , 3 ), ( 4 , 2 )
  • the parameter in ( 4 , 3 ) ⁇ represents the preset network applicability parameter
  • ⁇ represents the system bandwidth of the network corresponding to ⁇ (ie the total spectrum bandwidth in the system)
  • ⁇ represents the remaining capacity of the network corresponding to ⁇
  • Constant that represents the weight of the remaining capacity and business characteristics.
  • more than two networks include: LTE systems, GSM systems, and WCDMA systems;
  • the equivalent spectral bandwidth in GSM is obtained according to the following formula (3); and the remaining capacity in the GSM system is obtained according to the following formula (4);
  • C represents the total number of subcarriers preset in the LTE system, ?, composer indicates the preset ⁇ , the rate of the “user” in the class service;
  • ⁇ denotes the measured ⁇
  • ⁇ 2 represents the measured noise power
  • ⁇ represents the acquired ⁇
  • c ' indicates the allocation of the calculation acquisition
  • ⁇ the number of subcarriers of the "users in the class", ", is the coefficient, « ⁇ -1-5 10 ⁇ 5 ⁇ ).
  • ⁇ indicates the system capacity preset in the LTE system. This value is determined by the operator when establishing the network.
  • ⁇ ⁇ ⁇ indicates the number of users of the session type service, the interaction type service, the flow type service, and the background type service in the LTE system, respectively
  • ⁇ ⁇ , ⁇ 2 , and d ⁇ 4 represent the session type service and the interaction type service in the LTE system, respectively.
  • ⁇ , ", C, ? ⁇ in the above formula (1) and formula (2) are system parameters designed when the LTE system is established; G yn and ⁇ 2 are measured by the terminal and/or the base station. Parameters.
  • ⁇ represents the equivalent spectral bandwidth of the session class service in the GSM system.
  • ⁇ represents the total spectrum bandwidth preset in the WCDMA system. This value is determined by the operator when establishing the network, usually 5MHz.
  • NN 2 and N 4 respectively indicate that there are already session-type services and interactive services in the WCDMA system.
  • d ⁇ 2 respectively represent the equivalent spectrum bandwidth of the session type service, the interaction type service, and the background type service in the WCDMA system.
  • the above network switching method considers the remaining capacity of each network in the heterogeneous network on the one hand; on the other hand, considers the types of services that the network can support, for example, classifying the network according to the types of services that the network can support, for a specific service.
  • the types of services that the network can support for example, classifying the network according to the types of services that the network can support, for a specific service.
  • the GSM system is taken as an example to describe in detail the derivation process of the equivalent spectral bandwidth and residual capacity calculation formula in the GSM system.
  • the GSM system is a time division multiple access (TDMA) access method and The access method of Frequency Division Multiple Access (FDMA) is shown in Figure 4.
  • TDMA time division multiple access
  • FDMA Frequency Division Multiple Access
  • TDMA frames on one carrier have 8 slots, one slot Called a physical channel.
  • Each carrier frequency is defined as a TDMA frame, which is equivalent to one channel of the FDMA system.
  • the GSM system is a circuit-switched system in which each user can only use one time slot in one TDMA frame, that is, each user has an equivalent bandwidth of 25 kHz. It should be noted that since the GSM system is mainly applicable to session-type services, the above equivalent bandwidth can be understood as the equivalent bandwidth of a user's session-type service in the GSM system.
  • the services that the GSM system can provide are divided into basic communication services and supplementary services.
  • the supplementary services are only the expansion of basic services. They cannot be provided to users separately.
  • These supplementary services are not dedicated to the GSM system, and most supplementary services are It is inherited from the fixed network and the supplementary services that can be provided. Therefore, the communication service in the GSM system is mainly the session type service.
  • the number of users representing the services in the GSM system is set, and the sum of the equivalent spectrum bandwidths occupied by the users of the service type cannot exceed the total spectrum bandwidth w of the GSM system. .
  • the equivalent spectrum bandwidth of the session-type service is 25 ⁇ .
  • w 0 represents the system capacity preset in the GSM system (the value of this is determined by the operator when establishing the system network), indicating the number of users who already have session-type services in the GSM system, and ⁇ indicates the session class in the GSM system.
  • the equivalent spectral bandwidth of the service is the system capacity preset in the GSM system (the value of this is determined by the operator when establishing the system network), indicating the number of users who already have session-type services in the GSM system, and ⁇ indicates the session class in the GSM system. The equivalent spectral bandwidth of the service.
  • the equivalent spectrum bandwidth and the LTE system. The derivation process of the calculation formula of the remaining capacity.
  • an Orthogonal Frequency Division Multiple Access (OFDMA) system is taken as an example to determine that there are a total of C subcarriers in an OFDMA system, and each service type in the OFDMA system. Users have their own fixed power limits. For example: The first user in a service with the service type ⁇ ⁇ 1 , 2 , ... is assigned the average power of ⁇ «.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • the service types in this embodiment include: a session type service, an interaction type service, a background type service, and a flow type service.
  • the user rate, ⁇ is a predetermined value.
  • the network switching device (such as the base station) can perform subcarrier allocation on the medium access control layer (MAC) level according to the bandwidth requirement of each user to meet the transmission quality requirement.
  • MAC medium access control layer
  • an OFDMA system with multiple services access can be seen as a system that guarantees both QoS requirements.
  • the equivalent spectrum bandwidth of the session type service, the interaction type service, the flow type service, and the background service in the LTE system can be calculated.
  • step 102 shown in FIG. 2 and step 302 shown in FIG. 3 it is determined that: according to the identifier of the current service of the terminal, the service feature of the current service of the terminal is determined, and two or more networks matching the service feature are selected. .
  • the service feature-based network selection algorithm is illustrated as follows, which is used to determine whether to allow services to access the network according to the service characteristics and the relative remaining bandwidth of the network.
  • Service characteristics refer to different types of services that can be accessed by various types of services.
  • session services can be connected to GSM systems, WCDMA systems, and LTE systems. This is called access capability, and interactive services can be connected.
  • the streaming service can access the LTE system, which is called poor access capability, and the background service can access the WCDMA system and the LTE system. Therefore, the GSM system has the most single bearer service and is only suitable for accessing the session type service. It is called the network applicability is poor.
  • the four services in the LTE system can be carried, which is called network applicability.
  • the definition ⁇ indicates the applicability of the network, that is, the ability of the network to allow access to the type of service. If the applicability of the network is worse, the priority of the network being selected is higher, and conversely, the lower the priority of the network being selected. That is, as long as the business allows, first select the network with poor capability, and select the high-end network for the demanding business.
  • RAT j represents the wireless access technology of the j network/system, because the access technologies of different networks are different, so the RAT j can be used to represent the j network/system;
  • ⁇ indicates the number of service types that the j network/system can access
  • ⁇ indicates the ratio of the number of service types that the j network/system can access to the total number of service types. The larger the value, the better the applicability of the RAT j network, and the lower the priority of the network is selected; otherwise, the RAT j The poorer the applicability of the network, the higher the priority of the network being selected.
  • control condition of another access network is the relative remaining capacity of the network (the ratio of the remaining capacity of the network to the total spectrum bandwidth of the network), and the remaining capacity of the network is greater than or equal to that required for the type of service in the RAT j network.
  • the control condition of another access network is the relative remaining capacity of the network (the ratio of the remaining capacity of the network to the total spectrum bandwidth of the network), and the remaining capacity of the network is greater than or equal to that required for the type of service in the RAT j network.
  • the class service can access (for example, the session type service can access any network, and the flow service is only suitable for accessing the LTE system, etc.); secondly, judge the remaining of these networks. Whether the capacity is greater than or equal to the equivalent bandwidth required by the service in the network. If ⁇ , it can be accessed. Otherwise, the access is denied. Finally, in a network that meets the above conditions, a network with poor applicability and relatively large remaining capacity is selected.
  • M/ for ⁇ , class service, ⁇ / combines two indicators of remaining capacity and business characteristics, which are their weighted values, and select the appropriate network with ⁇ /. .
  • ⁇ represents the remaining capacity of the RAT j network
  • ⁇ represents the total spectrum bandwidth of the system of the RATj network
  • « is a constant that reflects the weight of the two factors of the service characteristics and relative residual capacity in the network selection, which can be determined by the operator.
  • Condition 2 ⁇ Reactive network has enough remaining capacity to carry the service; then, based on these two necessary conditions, select a network with poor applicability and relatively large remaining capacity.
  • the above method of network handover indicates that the network j selected by the service is an optimal network selected by combining two factors of remaining capacity and service characteristics.
  • the user's arrival obeys the Poisson distribution, and the user's departure obeys the binomial distribution.
  • the function ⁇ determines whether the session type service can access the GSM network, and the function value is 1 to indicate access, and the function value is 0 to indicate that it cannot access;
  • the function ⁇ 2 ( , ⁇ " ⁇ "" , " ⁇ ” determines whether the session-type service can access the WCDMA system, the function value is 1 to indicate access, and the function value is 0 to indicate that it cannot access;
  • the function a im ⁇ l , m n , m 22 , m 42 , m u , m 23 , m 33 , m 43 ) determines whether the session class service can be accessed
  • Function 01 determines whether the interactive class (or background class) service can access the WCDMA system.
  • the function value is 1 to indicate access, and the function value is 0.
  • Indicates that access is not possible; function 0 11 , " 712 , 2 , 2 , " 713 , 3 33 , 3 ) determines whether the interactive class (or background class) service can access the LTE system, and the function value is 1 to indicate access, function A value of 0 means no access.
  • the streaming service can only access the LTE network, so no judgment function is needed.
  • the comparison object is a general network selection algorithm based on relative residual capacity, and the formula selected by the network selection algorithm is:
  • (31') it represents the ratio of resources occupied by users already existing in the network to system resources.
  • the network selected by the network selection algorithm based on the relative remaining capacity is that within the network accessible by the service, the existing users in the network occupy the smallest resources and the remaining resources are sufficient to carry the network of the service.
  • the call blocking rate of each type of service is based on the network feature selection algorithm based on the service characteristics and the network selection algorithm based on the relative remaining capacity.
  • the system capacity of the preset GSM system, WCDMA system, and LTE system are:
  • the call blocking rate of various services calculated based on the service feature-based network selection algorithm is calculated compared to the network selection algorithm based on the relative remaining capacity.
  • the blocking rate is small, whereby the network feature selection algorithm based on the traffic characteristics allows more users to access in the case of the same arrival rate and departure rate.
  • the above formula for selecting a network enables the device to more appropriately allocate resources of the heterogeneous network, improve the utilization of the heterogeneous network resources, and reduce the call blocking rate of the service.
  • the method for network handover in this embodiment preferably maps time slots in the GSM system to equivalent spectrum bandwidth, maps orthogonal carriers in the LTE system to equivalent spectrum bandwidth, and converts the WCDMA system.
  • the orthogonal code channel mapping in the middle is equivalent to the bandwidth of the spectrum, which is more conducive to the allocation of resources, and the comparison and scheduling of system resources between systems.
  • the process of realizing the equivalent spectrum bandwidth not only the load of the network is considered. (relative residual capacity of the network), also considering the business characteristics, based on these two factors to select the network. Therefore, the resource allocation of heterogeneous networks is more reasonable, the utilization of heterogeneous network resources is higher, and the call blocking rate of services is lower.
  • the present invention further provides a device for network switching.
  • the device for network switching in this embodiment includes: a receiving unit 81, a selecting unit 82, and a target network selecting unit 83. ;
  • the receiving unit 81 is configured to receive a network switching request sent by the terminal, where the network switching request includes: an identifier of a current service of the terminal;
  • the selecting unit 82 is configured to determine, according to the identifier, a service feature of the current service, and select two or more networks that match the service feature;
  • the target network selecting unit 83 is configured to select a network with poor applicability and/or a relatively large remaining capacity in the two or more networks as the target network of the terminal handover;
  • the relative remaining capacity is the ratio of the remaining capacity represented by the equivalent spectral bandwidth of each of the two or more networks to the total spectral bandwidth of the network.
  • the target network selection unit 83 is further configured to use the network selected by the selection unit 82 as the target network switched by the terminal.
  • the apparatus for network switching shown in FIG. 9A further includes: a sending unit 84, configured to send a network switching response to the terminal, where the network switching response includes the selected The identity of the target network.
  • the foregoing service features include: a session type service feature, an interaction class service feature, a stream class service feature, or a background class service feature.
  • the device for network switching further includes: an obtaining unit 83a (as shown in FIG. 9B), the acquiring unit 83a is configured to acquire a remaining capacity of each of the two or more networks, and the terminal The equivalent spectrum bandwidth occupied by the current service in the two or more networks.
  • Rj represents the preset network applicability parameter
  • ⁇ represents the total spectrum bandwidth in the network corresponding to ⁇
  • ⁇ represents the remaining capacity of the network corresponding to ⁇
  • the two or more networks include: an LTE system, a GSM system, and a WCDMA system;
  • the acquiring unit 83a is specifically used for
  • the equivalent spectral bandwidth in the WCDMA system is obtained according to the following formula (5); and the remaining capacity in the WCDMA system is obtained according to the following formula (6)
  • W represents the preset subcarrier bandwidth, indicating the preset ⁇
  • C represents the total number of subcarriers preset in the LTE system, and represents the preset ⁇ , the rate of the "user" in the class service;
  • C ⁇ denotes the measured ⁇
  • the channel gain of the "user" on the first subcarrier in the class service ⁇ 2 represents the measured noise power
  • ⁇ represents the acquired ⁇
  • the "average user average power" in the class service represents the calculation
  • the number of subcarriers allocated to ⁇ , the first user in the class service is the coefficient, a ; «-1.5/log(55Ei?).
  • ⁇ indicates the system capacity preset in the LTE system. This value is determined by the operator when establishing the network.
  • NNN ⁇ indicates the number of users of the session type service, the interaction type service, the flow type service, and the background type service in the LTE system, respectively.
  • ⁇ ⁇ , ⁇ 2 , and d respectively represent the session type service, the interaction type service, and the flow class in the LTE system. Equivalent bandwidth for business and background services;
  • ⁇ ⁇ represents the equivalent spectral bandwidth of the session-type service in the GSM system.
  • GSM The total spectrum bandwidth preset in the system, indicating the number of users who already have session-type services in the GSM system;
  • N 4 denotes the number of users of the session type service, the interactive type service, and the background type service, respectively, in the WCDMA system, and d ⁇ 2 , which respectively represent the equivalent spectrum bandwidth of the session type service, the interactive type service, and the background type service in the WCDMA system.
  • the device for network switching in this embodiment can make the resource allocation of the heterogeneous network more reasonable, the utilization of the heterogeneous network resources is higher, and the call blocking rate of the service is lower.
  • the device for network switching may include a processor and a memory, where the functions implemented by the processor may be functions implemented by the receiving unit 81, the selecting unit 82, and the target network selecting unit 83. Further, The processor is also used to implement the functions implemented by the transmitting unit 84 and the obtaining unit 83a described above.
  • the above memory can be used to store the above formula (1) to formula (6), and in the processing of the processor, the processor can respectively acquire the remaining in each network according to formulas (1) to (6) in the memory.
  • the capacity and the equivalent bandwidth, and the processor after receiving the network switching request sent by the terminal, determining the service feature of the current service according to the identifier, and selecting two or more networks that match the service feature; Networks with poor applicability, and/or relatively large remaining capacity in more than one network serve as the target network for the terminal handover.
  • the present invention further provides a base station, which may include the apparatus for network switching described in any of the embodiments of the present invention.
  • the device for network switching can implement the network switching method described in any of the above embodiments.
  • the present invention further provides a base station controller, which may include a network switching apparatus according to any of the embodiments of the present invention, where the network switching apparatus may implement any of the foregoing embodiments.
  • a base station controller which may include a network switching apparatus according to any of the embodiments of the present invention, where the network switching apparatus may implement any of the foregoing embodiments. The network switching method described.
  • the device for network switching mentioned above may be a device newly added in an existing network, or may be a functional module integrated in an existing device in an existing network, for example, integrated in a multimode base station controller.
  • Device in ( Multi-Mode Base Station Controller ) It will be understood by those skilled in the art that all or part of the steps of implementing the above method embodiments may be performed by hardware related to the program instructions.
  • the aforementioned program can be stored in a computer readable storage medium. When the program is executed, the steps including the foregoing method embodiments are performed; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Landscapes

  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un dispositif de commutation de réseau, une station de base et un contrôleur de station de base. Le procédé consiste à : recevoir une demande de commutation de réseau envoyée par un terminal, la demande de commutation de réseau comprenant un identifiant du service courant du terminal ; déterminer la caractéristique du service courant selon l'identifiant et sélectionner plus de deux réseaux correspondants à la caractéristique du service ; et sélectionner un réseau ayant une faible applicabilité et/ou une grande capacité résiduelle relative parmi les deux réseaux ou plus en tant que réseau cible auquel le terminal est commuté, la capacité résiduelle relative étant le rapport de la capacité résiduelle, représentée par une largeur de bande spectrale équivalente, de chaque réseau parmi les deux réseaux ou plus sur la largeur de bande spectrale totale du réseau. Le procédé susmentionné résout les problèmes de la technique de l'art selon lesquels la distribution des ressources de réseau n'est pas correcte et que le taux d'utilisation des ressources de réseau est faible.
PCT/CN2012/081437 2012-09-14 2012-09-14 Procédé et dispositif de commutation de réseau, station de base et contrôleur de station de base WO2014040283A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201280001816.5A CN103109564B (zh) 2012-09-14 2012-09-14 网络切换的方法及装置、基站、基站控制器
PCT/CN2012/081437 WO2014040283A1 (fr) 2012-09-14 2012-09-14 Procédé et dispositif de commutation de réseau, station de base et contrôleur de station de base

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2012/081437 WO2014040283A1 (fr) 2012-09-14 2012-09-14 Procédé et dispositif de commutation de réseau, station de base et contrôleur de station de base

Publications (1)

Publication Number Publication Date
WO2014040283A1 true WO2014040283A1 (fr) 2014-03-20

Family

ID=48316018

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/081437 WO2014040283A1 (fr) 2012-09-14 2012-09-14 Procédé et dispositif de commutation de réseau, station de base et contrôleur de station de base

Country Status (2)

Country Link
CN (1) CN103109564B (fr)
WO (1) WO2014040283A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10111162B2 (en) 2014-11-14 2018-10-23 Acer Incorporated Method of controlling network traffic for user equipment and base station and related apparatuses using the same
CN104618921B (zh) * 2015-01-15 2018-05-29 南京邮电大学 一种多业务大规模mimo系统的用户容量的估计方法
CN105050145B (zh) * 2015-08-31 2018-12-25 宇龙计算机通信科技(深圳)有限公司 带宽设置切换方法及装置
CN105744549B (zh) * 2016-02-03 2019-06-11 宇龙计算机通信科技(深圳)有限公司 一种传输路径的切换方法、终端和系统
CN108718335A (zh) * 2018-05-14 2018-10-30 北京百悟科技有限公司 一种负载均衡方法、装置、Web服务器及存储介质

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1443790A1 (fr) * 2003-01-31 2004-08-04 Nokia Corporation Procédé et système pour partager la capacité dans un réseau d'accès radio
CN101657000A (zh) * 2008-08-21 2010-02-24 中国移动通信集团公司 一种确定接入网络的方法及系统
CN101772102A (zh) * 2009-12-28 2010-07-07 中国科学院计算技术研究所 一种异构无线网络选择方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8412247B2 (en) * 2010-09-03 2013-04-02 Nokia Corporation Method for generating a coexistence value to define fair resource share between secondary networks

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1443790A1 (fr) * 2003-01-31 2004-08-04 Nokia Corporation Procédé et système pour partager la capacité dans un réseau d'accès radio
CN101657000A (zh) * 2008-08-21 2010-02-24 中国移动通信集团公司 一种确定接入网络的方法及系统
CN101772102A (zh) * 2009-12-28 2010-07-07 中国科学院计算技术研究所 一种异构无线网络选择方法

Also Published As

Publication number Publication date
CN103109564A (zh) 2013-05-15
CN103109564B (zh) 2016-06-22

Similar Documents

Publication Publication Date Title
CN109565793B (zh) 一种终端选择资源的方法及装置、计算机存储介质
CN108605367B (zh) 用于在多用户无线通信系统中对随机接入进行优先级排序的装置和方法
RU2391798C2 (ru) Использование сообщений использования ресурсов в мас с множеством несущих для достижения равноправности
US7292863B2 (en) Admission control method and device in mobile communication system
EP3468258B1 (fr) Procédé de commande de transmission de données et dispositif
WO2011060719A1 (fr) Procédé et appareil pour un accès par un terminal
US11252611B2 (en) Apparatus and method for determining bandwidth in wireless communication system
EP3668259A1 (fr) Appareil et procédé pour fournir un réseau de service dans un système de communication sans fil
WO2021163601A1 (fr) Appareil et procédés de gestion de tampon de dispositif d'utilisateur dans des réseaux sans fil
CN108271255B (zh) 一种业务数据分流的方法及装置
WO2014040283A1 (fr) Procédé et dispositif de commutation de réseau, station de base et contrôleur de station de base
US9622115B2 (en) Channel negotiation method, device, and system
CN110769468B (zh) 网络切片的处理方法、接入网网元及用户终端
US20220279487A1 (en) Resource exclusion method and apparatus, and storage medium
US20120300647A1 (en) System and Method for Providing Communication Services
JP2023514297A (ja) 情報伝送方法及び情報伝送装置、関連機器、並びに記憶媒体
CN110622550B (zh) 保证无线通信系统中服务质量的方法和装置
US8064915B2 (en) Method for providing telecommunications services, related system and information technology product
WO2014047873A1 (fr) Procédé de signalisation et appareils prenant en charge l'allocation de ressources radio sensible à la qoe
Jorgensen et al. On the potentials of traffic steering techniques between HSDPA and LTE
WO2015066929A1 (fr) Procédé et dispositif de sélection de réseau d'accès sans fil
WO2007082437A1 (fr) Procédé et système d'attribution de voies
WO2022051946A1 (fr) Procédé et appareil de resélection de ressource, et terminal et support de stockage
CN112637905B (zh) Nsa组网方式下的语音业务建立方法、装置及存储介质
CN112073975B (zh) 一种终端间多跳通信的非授权频谱边缘共享方法及装置

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 201280001816.5

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12884740

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12884740

Country of ref document: EP

Kind code of ref document: A1