CN112449387A - Communication method, terminal and base station - Google Patents
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- CN112449387A CN112449387A CN201910831375.5A CN201910831375A CN112449387A CN 112449387 A CN112449387 A CN 112449387A CN 201910831375 A CN201910831375 A CN 201910831375A CN 112449387 A CN112449387 A CN 112449387A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/20—Selecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
A communication method, a terminal and a base station are provided, the method comprises: receiving slice information of at least one cell sent by a base station, wherein the slice resource information comprises at least one of slice load information, slice resource information and slice service quality; and performing cell reselection or access according to the slice information of at least one cell sent by the base station. The embodiment of the invention ensures that the terminal can reselect or access the cell according to the slice information by exchanging the slice information between the terminal and the base station, can reduce or avoid unexpected slice access failure or slice QoS (quality of service) rollback and other conditions in a newly accessed cell, and improves the communication performance of the terminal.
Description
Technical Field
The present invention relates to the field of mobile communication technologies, and in particular, to a communication method, a terminal, and a base station.
Background
In the cell handover process, a handover preparation message is typically sent from a source base station to a target base station, and the target base station performs admission control and replies to a handover command. In the prior art, if a target base station does not support a slice in which a terminal is running during a handover process, the slice is directly rejected, thereby causing interruption of a terminal service and affecting user service experience. In addition, before the handover occurs, since the source base station does not know information such as congestion condition, resource reservation, quality of service (QoS) backoff, etc. of a slice of the target base station, it may be discovered that the slice cannot normally obtain service after the handover occurs or QoS must be reduced to obtain the most basic service, which may cause some slice handover failures or affect user experience.
Similarly, before cell reselection, the terminal does not know information such as congestion condition, resource reservation, quality of service (QoS) backoff, etc. of the slice on the serving cell/neighboring frequency, so that it is also possible that the terminal finds that the terminal cannot access the target cell after cell reselection, which may affect the success rate of cell reselection and reduce user experience.
Disclosure of Invention
At least one embodiment of the present invention provides a communication method, a terminal and a network device, where the embodiments of the present invention interact slice information between the terminal and a base station, so that the terminal can perform cell reselection or cell access according to the slice information, thereby reducing or avoiding unexpected situations such as slice access failure or slice QoS fallback in a newly accessed cell, and improving the communication performance of the terminal.
According to another aspect of the present invention, at least one embodiment provides a communication method applied to a terminal, including:
receiving slice information of at least one cell sent by a base station, wherein the slice resource information comprises at least one of slice load information, slice resource information and slice service quality;
and performing cell reselection or access according to the slice information of at least one cell sent by the base station.
Optionally, the slice load information is a load rate or a load interval to which the load rate belongs;
the slice resource information includes at least one of the following resources: the number of reserved carriers, the number of subcarriers, the bandwidth, the transmission resource block, the symbol and the time slot;
the slice quality of service information comprises fallback indication information for indicating that the quality of service of a slice is to be backed off when congestion occurs, wherein the quality of service comprises at least one of the following parameters: 5QI category, delay, priority or sum rate.
Optionally, the step of performing cell reselection or cell access according to the slice information of at least one cell sent by the base station includes:
selecting a target slice from first type slices of each cell according to slice information of at least one cell sent by the base station, and performing cell reselection or access by using a cell corresponding to the target slice as a target cell, wherein the first type slice is a slice supported by the terminal or a slice corresponding to a service initiated by the terminal.
Optionally, the step of selecting a target slice from the first type slices of the respective cells includes:
selecting the slice with the lightest load rate as the target slice according to the slice load information of each slice in the first type of slices;
or selecting the slice with the highest reserved resource as the target slice according to the slice resource information of each slice in the first type of slices;
or selecting the slice with the highest idle resource as the target slice according to the slice load information and the slice resource information of each slice in the first type of slices;
or, according to the slice service quality of each slice in the first type of slices, selecting the slice with the lowest service quality backspace degree as the target slice;
or randomly selecting one slice from the first type slices as the target slice.
Optionally, when the first type slice is a slice corresponding to a service initiated by the terminal, after reselecting the target cell, the method further includes:
and initiating random access on the first type of slice of the target cell, and accessing to the first type of slice.
According to another aspect of the present invention, at least one embodiment provides a communication method applied to a base station, including:
and sending slice information of at least one cell to a terminal, wherein the slice resource information comprises at least one of slice load information, slice resource information and slice service quality, and the slice information is used for the terminal to perform cell reselection or access.
According to another aspect of the present invention, at least one embodiment provides a terminal including:
the receiving module is configured to receive slice information of at least one cell sent by a base station, where the slice resource information includes at least one of slice load information, slice resource information, and slice quality of service;
and the cell selection module is used for carrying out cell reselection or access according to the slice information of at least one cell sent by the base station.
Optionally, the slice load information is a load rate or a load interval to which the load rate belongs;
the slice resource information includes at least one of the following resources: the number of reserved carriers, the number of subcarriers, the bandwidth, the transmission resource block, the symbol and the time slot;
the slice quality of service information comprises fallback indication information for indicating that the quality of service of a slice is to be backed off when congestion occurs, wherein the quality of service comprises at least one of the following parameters: 5QI category, delay, priority or sum rate.
Optionally, the cell selection module is further configured to select a target slice from first type slices of each cell according to slice information of at least one cell sent by the base station, and perform cell reselection or cell access using a cell corresponding to the target slice as a target cell, where the first type slice is a slice supported by the terminal or a slice corresponding to a service initiated by the terminal.
Optionally, the cell selection module is further configured to:
selecting the slice with the lightest load rate as the target slice according to the slice load information of each slice in the first type of slices;
or selecting the slice with the highest reserved resource as the target slice according to the slice resource information of each slice in the first type of slices;
or selecting the slice with the highest idle resource as the target slice according to the slice load information and the slice resource information of each slice in the first type of slices;
or, according to the slice service quality of each slice in the first type of slices, selecting the slice with the lowest service quality backspace degree as the target slice;
or randomly selecting one slice from the first type slices as the target slice.
Optionally, the cell selection module is further configured to initiate a random access on the first type slice of the target cell, and access to the first type slice.
In accordance with another aspect of the present invention, at least one embodiment provides a terminal comprising a transceiver and a processor, wherein,
the transceiver is configured to receive slice information of at least one cell sent by a base station, where the slice resource information includes at least one of slice load information, slice resource information, and slice quality of service;
and the processor is used for performing cell reselection or cell access according to the slice information of at least one cell sent by the base station.
Optionally, the slice load information is a load rate or a load interval to which the load rate belongs;
the slice resource information includes at least one of the following resources: the number of reserved carriers, the number of subcarriers, the bandwidth, the transmission resource block, the symbol and the time slot;
the slice quality of service information comprises fallback indication information for indicating that the quality of service of a slice is to be backed off when congestion occurs, wherein the quality of service comprises at least one of the following parameters: 5QI category, delay, priority or sum rate.
Optionally, the processor is further configured to select a target slice from first type slices of each cell according to slice information of at least one cell sent by the base station, and perform cell reselection or cell access using a cell corresponding to the target slice as a target cell, where the first type slice is a slice supported by the terminal or a slice corresponding to a service initiated by the terminal.
Optionally, the processor is further configured to:
selecting the slice with the lightest load rate as the target slice according to the slice load information of each slice in the first type of slices;
or selecting the slice with the highest reserved resource as the target slice according to the slice resource information of each slice in the first type of slices;
or selecting the slice with the highest idle resource as the target slice according to the slice load information and the slice resource information of each slice in the first type of slices;
or, according to the slice service quality of each slice in the first type of slices, selecting the slice with the lowest service quality backspace degree as the target slice;
or randomly selecting one slice from the first type slices as the target slice.
Optionally, the processor is further configured to initiate a random access on the first type slice of the target cell, and access to the first type slice.
According to another aspect of the present invention, at least one embodiment provides a terminal including: a processor, a memory and a program stored on the memory and executable on the processor, which program, when executed by the processor, carries out the steps of the communication method as described above.
According to another aspect of the present invention, at least one embodiment provides a base station comprising:
the system comprises a sending module, a receiving module and a processing module, wherein the sending module is used for sending slice information of at least one cell to a terminal, the slice resource information comprises at least one of slice load information, slice resource information and slice service quality, and the slice information is used for the terminal to perform cell reselection or access.
In accordance with another aspect of the present invention, at least one embodiment provides a base station comprising a transceiver and a processor, wherein,
the transceiver is configured to send slice information of at least one cell to a terminal, where the slice resource information includes at least one of slice load information, slice resource information, and slice service quality, and the slice information is used for the terminal to perform cell reselection or cell access.
According to another aspect of the present invention, at least one embodiment provides a base station comprising: a processor, a memory and a program stored on the memory and executable on the processor, which program, when executed by the processor, carries out the steps of the communication method as described above.
According to another aspect of the present invention, at least one embodiment provides a communication method applied to a first base station, where the first base station is a serving base station of a terminal, including:
receiving slice information of at least one cell sent by a second base station, wherein the slice information comprises at least one of slice load information, slice resource information and slice service quality;
and selecting a target cell of terminal slicing and carrying out cell switching according to the slicing information of at least one cell sent by the second base station.
Optionally, the slice load information is a load rate or a load interval to which the load rate belongs;
the slice resource information includes at least one of the following resources: the number of reserved carriers, the number of subcarriers, the bandwidth, the transmission resource block, the symbol and the time slot;
the slice quality of service information comprises fallback indication information for indicating that the quality of service of a slice is to be backed off when congestion occurs, wherein the quality of service comprises at least one of the following parameters: 5QI category, delay, priority or sum rate.
Optionally, the step of selecting a target cell of the terminal slice according to the slice information of the at least one cell sent by the second base station includes:
and selecting a target slice from first type slices of each cell according to slice resource information of at least one cell sent by the second base station, and taking a cell corresponding to the target slice as a target cell, wherein the first type slice is a slice supported by the terminal or a slice corresponding to a service initiated by the terminal.
Optionally, the step of selecting a target slice from the first type slices of the respective cells includes:
selecting the slice with the lightest load rate as the target slice according to the slice load information of each slice in the first type of slices;
or selecting the slice with the highest reserved resource as the target slice according to the slice resource information of each slice in the first type of slices;
or selecting the slice with the highest idle resource as the target slice according to the slice load information and the slice resource information of each slice in the first type of slices;
or, according to the slice service quality of each slice in the first type of slices, selecting the slice with the lowest service quality fallback degree as the target slice.
According to another aspect of the present invention, at least one embodiment provides a communication method applied to a second base station, including:
the method comprises the steps of sending slice information of at least one cell to a first base station, wherein the slice information comprises at least one of slice load information, slice resource information and slice service quality, and the slice information is used for the first base station to carry out cell switching.
According to another aspect of the invention, at least one embodiment provides a computer readable storage medium having a program stored thereon, which when executed by a processor, performs the steps of the method as described above.
Compared with the prior art, the communication method, the terminal and the network device provided by the embodiment of the invention have the advantages that the terminal can perform cell reselection or access according to the slice information through the interaction of the slice information between the terminal and the base station, the unexpected situations of slice access failure or slice QoS (quality of service) rollback and the like in a newly accessed cell can be reduced or avoided, and the communication performance of the terminal is improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic view of an application scenario according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a communication method according to an embodiment of the present invention applied to a terminal side;
fig. 3 is a flowchart illustrating a communication method according to an embodiment of the present invention applied to a base station;
fig. 4 is a flowchart of a communication method applied to a first base station side according to an embodiment of the present invention;
fig. 5 is a flowchart of a communication method applied to a second base station side according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a terminal according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a network device according to an embodiment of the present invention;
fig. 9 is another schematic structural diagram of a network device according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. In the description and in the claims "and/or" means at least one of the connected objects.
The techniques described herein are not limited to NR systems and Long Time Evolution (LTE)/LTE Evolution (LTE-a) systems, and may also be used for various wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single carrier Frequency Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably. CDMA systems may implement Radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA), and so on. UTRA includes Wideband CDMA (Wideband Code Division Multiple Access, WCDMA) and other CDMA variants. TDMA systems may implement radio technologies such as Global System for Mobile communications (GSM). The OFDMA system may implement radio technologies such as Ultra Mobile Broadband (UMB), evolved-UTRA (E-UTRA), IEEE 802.21(Wi-Fi), IEEE 802.16(WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are parts of the Universal Mobile Telecommunications System (UMTS). LTE and higher LTE (e.g., LTE-A) are new UMTS releases that use E-UTRA. UTRA, E-UTRA, UMTS, LTE-A, and GSM are described in documents from an organization named "third Generation Partnership Project" (3 GPP). CDMA2000 and UMB are described in documents from an organization named "third generation partnership project 2" (3GPP 2). The techniques described herein may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. However, the following description describes the NR system for purposes of example, and NR terminology is used in much of the description below, although the techniques may also be applied to applications other than NR system applications.
The following description provides examples and does not limit the scope, applicability, or configuration set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the spirit and scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For example, the described methods may be performed in an order different than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Referring to fig. 1, fig. 1 is a block diagram of a wireless communication system to which an embodiment of the present invention is applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may also be referred to as a User terminal or a User Equipment (UE), where the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or a vehicle-mounted Device, and the specific type of the terminal 11 is not limited in the embodiment of the present invention. The network device 12 may be a Base Station and/or a core network element, wherein the Base Station may be a 5G or later-version Base Station (e.g., a gNB, a 5G NR NB, etc.), or a Base Station in other communication systems (e.g., an eNB, a WLAN access point, or other access points, etc.), wherein the Base Station may be referred to as a node B, an evolved node B, an access point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, or some other suitable terminology in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, it should be noted that, in the embodiment of the present invention only takes the Base Station in the NR system as an example, but does not limit the specific type of base station.
The base stations may communicate with the terminals 11 under the control of a base station controller, which may be part of the core network or some of the base stations in various examples. Some base stations may communicate control information or user data with the core network through a backhaul. In some examples, some of the base stations may communicate with each other, directly or indirectly, over backhaul links, which may be wired or wireless communication links. A wireless communication system may support operation on multiple carriers (waveform signals of different frequencies). A multi-carrier transmitter can transmit modulated signals on the multiple carriers simultaneously. For example, each communication link may be a multi-carrier signal modulated according to various radio technologies. Each modulated signal may be transmitted on a different carrier and may carry control information (e.g., reference signals, control channels, etc.), overhead information, data, and so on.
The base station may communicate wirelessly with the terminal 11 via one or more access point antennas. Each base station may provide communication coverage for a respective coverage area. The coverage area of an access point may be divided into sectors that form only a portion of the coverage area. A wireless communication system may include different types of base stations (e.g., macro, micro, or pico base stations). The base stations may also utilize different radio technologies, such as cellular or WLAN radio access technologies. The base stations may be associated with the same or different access networks or operator deployments. The coverage areas of different base stations (including coverage areas of base stations of the same or different types, coverage areas utilizing the same or different radio technologies, or coverage areas belonging to the same or different access networks) may overlap.
The communication links in a wireless communication system may comprise an Uplink for carrying Uplink (UL) transmissions (e.g., from terminal 11 to network device 12) or a Downlink for carrying Downlink (DL) transmissions (e.g., from network device 12 to terminal 11). The UL transmission may also be referred to as reverse link transmission, while the DL transmission may also be referred to as forward link transmission. Downlink transmissions may be made using licensed frequency bands, unlicensed frequency bands, or both. Similarly, uplink transmissions may be made using licensed frequency bands, unlicensed frequency bands, or both.
As described in the background art, in the prior art, unexpected situations such as cell unavailability, slice access failure, or slice QoS fallback may occur after cell reselection or access of a terminal, which seriously affects user experience.
Referring to fig. 2, a communication method according to an embodiment of the present invention, when applied to a terminal side, includes:
Here, the base station may send, to the terminal, slice information of a cell, and specifically, may send slice information of one or more slices of the cell, where the cell may be one or more of a camped cell, a serving cell, or a neighboring cell of the terminal. The base station may be a base station to which a serving cell of the terminal belongs, that is, a serving base station, and the serving base station may send the slice information to the terminal through a system message or a dedicated signaling. When sending the slice information of the neighboring cell, the base station may also carry the frequency point information of the neighboring cell in the slice information of the neighboring cell. The slice information of the neighboring cell may be obtained through information interaction between base stations, and the specific interaction manner may refer to the description of fig. 3 and fig. 4 below.
According to at least one embodiment of the present invention, the slice load information is a load rate or a load interval to which the load rate belongs. For example, the load rate may be in the form of a percentage, such as 20% resource occupancy, or the like. The load interval may be several steps high, medium, low, indicating that a certain slice load condition of the base station is high, medium, or low load. The slice resource information may include at least one of the following resources: the number of reserved carriers, the number of subcarriers, the bandwidth, the transmission resource block, the symbol and the time slot. The slice quality of service information may include back-off indication information indicating a quality of service to back off a slice when congestion occurs, wherein the quality of service includes at least one of the following parameters: 5QI category, delay, priority or sum rate. Where 5QI is a scalar that can be used to index a 5G QoS characteristic.
And step 22, performing cell reselection or cell access according to the slice information of at least one cell sent by the base station.
Here, the terminal may perform cell reselection or cell access according to the slice information of the cell transmitted by the base station. Here, the cell reselection refers to sorting the relevant parameters of the plurality of cells according to the slice information, and reselecting a new resident cell of the terminal from the plurality of cells according to a sorting result. Cell access is usually a direct access to a certain cell without a reselection selection process. That is, in step 22, the terminal may reselect a cell according to the slice information, select a cell with the best ranking of some relevant parameters to camp again, or directly access the cell according to the slice information of the cell. For example, when slice information on a certain slice meets a preset quality requirement, the terminal may directly access the cell.
Through the steps, the embodiment of the invention informs the terminal of the relevant slice information (such as the congestion situation on a certain slice of the adjacent cell is reflected) in advance through the service cell, so that the terminal can select the frequency point or the cell of which the relevant parameter on the slice to be accessed meets the preset requirement (such as the lightest load or the preset quality requirement) to be resided or accessed, thereby reducing or avoiding the occurrence of unexpected slice access failure, cell access identification or slice QoS (quality of service) backspacing, improving the communication efficiency of the terminal and improving the use experience of a user.
Here, in step 22, the terminal may select a target slice from first type slices of each cell according to slice information of at least one cell sent by the base station, and perform cell reselection or access with a cell corresponding to the target slice as a target cell, where the first type slice is a slice supported by the terminal or a slice corresponding to a service initiated by the terminal.
Specifically, the terminal may select the target slice in any one of the following manners:
1) and selecting the slice with the lightest load rate as the target slice according to the slice load information of each slice in the first type of slices.
2) And selecting the slice with the highest reserved resource as the target slice according to the slice resource information of each slice in the first type of slices.
3) And selecting the slice with the highest idle resource as the target slice according to the slice load information and the slice resource information of each slice in the first type of slices.
4) And selecting the slice with the lowest service quality backspace degree as the target slice according to the slice service quality of each slice in the first type of slices.
5) Randomly selecting one slice from the first type of slices as the target slice.
In the above case of selecting a target slice, the slice information may be a condition to be considered, and the embodiment of the present invention may perform an integrated decision by integrating conditions such as signal quality of a cell and the slice information. For example, at least one candidate cell ranked in the top may be selected according to the signal quality, and then, for the selected candidate cell, a target slice may be selected according to slice information of the candidate cell, so as to perform cell reselection or cell access. In selecting the target slice, the selection may be made in a similar manner as above.
In addition, when the first type slice is a slice corresponding to a service initiated by the terminal, after the target cell is reselected, the terminal may initiate a random access on the first type slice of the target cell, and access to the first type slice.
For example, cell 1 sends slice information of the cell to the terminal, where the slice load information of cell 1 on slice 1 is light or 20%, and the slice load information of cell 1 on slice 2 is heavy or 80%; in addition, the cell 1 may also send slice information of the neighboring cell to the terminal, where the load of the cell 2 on the slice 1 is heavy, and the load of the cell 2 on the slice 2 is light, and at the same time, send the frequency point 2 where the cell 2 is located. When the terminal receives the above slice information, and subsequently when the terminal is ready to initiate a service of slice 2, or when a Radio Resource Control (RRC) layer of the terminal receives an access request of slice 2 from a non-access stratum (NAS) layer, or when the terminal is ready to resume the connection of slice 2 (for example, the connection of slice 2 has been established before, but the connection of slice 2 is suspended because the terminal enters a deactivated state), because the load of cell 2 on slice 2 is lighter than that of cell 1, the terminal may reselect to cell 2 first and then initiate an access on cell 2 to access slice 2. Of course, the terminal may also directly initiate access to the cell 2, accessing the slice 2.
For another example, taking the example of selecting a target slice according to the slice load and the slice resources, it is assumed that resource reservation information of inter-base station inter-slices includes reserved bandwidth, or subcarriers, or time slot resources. Meanwhile, slice load information can be interacted between base stations, for example, the load is 50% or 80%.
Assuming that the cell a reserves a 3MHz bandwidth for slice 1, the load is 50%; cell B reserves a bandwidth of 5MHz for slice 1 with a load of 80%. The terminal can estimate the spare resources according to the resource reservation and the load, the spare resources of the slice 1 of the cell A are 1.5MHz, and the spare resources of the slice 1 of the cell B are 1 MHz. It can be seen that there are more spare resources for slice 1 of cell a than for cell B.
When a terminal prepares to initiate a service of slice 1, or an RRC layer of the terminal receives an access request of slice 1 from an NAS layer, or the terminal prepares to resume connection of slice 1 (when connection of slice 1 has been established before, but when the terminal returns to a deactivated state, connection of slice 1 is suspended), the terminal reselects a cell B with more slice reserved resources or the minimum congestion, and then initiates access on the cell B to access slice 1.
Corresponding to the flow shown in fig. 2, an embodiment of the present invention further provides a communication method, as shown in fig. 3, when applied to a base station side, including:
The base station may be a base station to which a serving cell of the terminal belongs, that is, a serving base station, and the serving base station may send the slice information to the terminal through a system message or a dedicated signaling. When sending the slice information of the neighboring cell, the base station may also carry the frequency point information of the neighboring cell in the slice information of the neighboring cell.
Specifically, the base station may send, to the terminal, slice information of a cell, and specifically, may send slice information of one or more slices of the cell, where the cell may be one or more of a cell in which the terminal resides, a serving cell, or a neighboring cell.
Through the steps, the embodiment of the invention realizes the interaction of the slice information between the base station and the terminal, thereby providing the relevant reference information for the terminal to perform cell reselection/access according to the slice information, reducing or avoiding the conditions of unexpected slice access failure, cell access identification or slice QoS (quality of service) backspacing and the like of the subsequent terminal, improving the communication efficiency of the terminal and improving the use experience of users.
In the above communication method, the terminal may perform cell reselection or cell access according to the slice information sent by the base station through slice information interaction between the terminal and the base station, and the embodiment of the present invention may also perform slice information interaction between the base stations, so that the serving base station of the terminal may select a target cell for terminal handover based on the slice information of the neighboring base stations/cells, which will be described in detail below with reference to the accompanying drawings.
Referring to fig. 4, at least one embodiment of the present invention provides a communication method applied to a first base station, where the first base station is a serving base station of a terminal, that is, a base station to which a serving cell of the terminal belongs. As shown in fig. 4, the method includes:
Here, the slice load information may be a load rate or a load section to which the load rate belongs. The slice resource information may include at least one of the following resources: the number of reserved carriers, the number of subcarriers, the bandwidth, the transmission resource block, the symbol and the time slot. The slice quality of service information may include back-off indication information indicating a quality of service to back off a slice when congestion occurs, wherein the quality of service includes at least one of the following parameters: 5QI category, delay, priority or sum rate. The second base station may include one or more.
When the slice information is exchanged between the first base station and the second base station, the slice information may be exchanged using an X2, an Xn, an S1, or an NG interface, for example, using a load balancing signaling flow of the interface. In addition, in the embodiment of the present invention, the slice information may also be carried in a handover message (such as a handover failure or a handover completion or a handover preparation or a handover command message) of an X2, Xn, S1 or an NG interface between the first base station and the second base station, so that the slice information may be sent to the source base station or the target base station through the handover message for decision making in a next handover process. Here, the next handover may not be a handover for the same terminal as the current handover. Of course, the embodiment of the present invention may also carry the slice information in the process of information interaction between the inter-system base stations, for example, in the process of information interaction between the 4G base station and the 5G base station.
In addition, the first and second base stations may periodically perform the interaction of the slice information, or the second base station may transmit the slice information to the first base station only when the following situations occur, which may include, but are not limited to: slice load overload (exceeding a load threshold), slice resources below a predetermined resource threshold, and a QoS backoff indicated by slice quality of service resulting in QoS below a preset quality of service threshold, etc.
And 42, the first base station selects a target cell of terminal slicing according to the slicing information of at least one cell sent by the second base station and performs cell switching.
Here, the first base station may select a target slice from first type slices of each cell according to slice resource information of at least one cell sent by the second base station, and take a cell corresponding to the target slice as a target cell, where the first type slice is a slice supported by the terminal or a slice corresponding to a service initiated by the terminal.
Specifically, the first base station may select the target slice according to the following manner:
1) and selecting the slice with the lightest load rate as the target slice according to the slice load information of each slice in the first type of slices.
2) And selecting the slice with the highest reserved resource as the target slice according to the slice resource information of each slice in the first type of slices.
3) And selecting the slice with the highest idle resource as the target slice according to the slice load information and the slice resource information of each slice in the first type of slices.
4) And selecting the slice with the lowest service quality backspace degree as the target slice according to the slice service quality of each slice in the first type of slices.
In the above case of selecting a target slice, the slice information may be a condition to be considered, and the embodiment of the present invention may perform an integrated decision by integrating conditions such as signal quality of a cell and the slice information. For example, at least one candidate cell ranked in the top may be selected according to the signal quality, and then, for the selected candidate cell, a target slice may be selected according to slice information of the candidate cell, so as to perform cell handover. In selecting the target slice, the selection may be made in a similar manner as above.
Through the steps, the first base station can select the target cell switched by the terminal according to the slice information sent by other base stations, and further control the terminal to be switched to the target cell, so that mobility management (such as switching judgment) and resource scheduling can be better assisted on the network side through interaction of the slice information (such as congestion condition, QoS (quality of service) backspace and the like) among the base stations, unexpected slice access failure or slice QoS backspace and other conditions which occur after cell switching are avoided, the communication efficiency of the terminal is improved, and the user experience is improved.
Taking the example of selecting the target cell according to the slice load of the neighboring cell, the source base station (first base station) may select the base station (i.e., the target base station) to which the target cell belongs according to the slice load condition of the neighboring base station (second base station) during handover.
Example a: assume that the source base station knows the load information of the slices of multiple neighboring base stations (or cells), e.g., slice 1 high load of neighboring base station a, slice 2 low load of neighboring base station a, slice 1 low load of neighboring base station B, slice 2 high load of neighboring base station B. If some terminal is doing the service of slice 1 and the signal strength of base stations a and B are similar according to the measurement report of the terminal, the source base station may preferentially use the neighboring base station B as the target base station.
Example b: assuming that the terminal operates slice 1 and slice 2 simultaneously and the signal strengths of base stations a and B are similar, the network side can select a target base station for handover according to the slice priority, for example, if the priority of slice 1 is higher than that of slice 2, the base station with low load of slice 1 is preferentially taken as the target base station.
Taking the example of selecting the target cell according to the slice service quality of the neighboring cell, the source base station (first base station) may select a base station (i.e., a target base station) to which the target cell belongs according to the slice service quality of the neighboring base station (second base station) during handover.
Example c: assume that both base station a and base station B support slice 1, but due to slice 1 congestion of base station B, it is necessary to fallback to QoS for slice 1, e.g., 5QI from 5 to 6, or to fallback to 10ms from 1ms for latency, or to fallback to 10Mbps for rate from 100Mbps, etc. In the embodiment of the invention, the QoS backspacing information of the slice is interacted between the base stations, so that when the base station selects the switched target base station for the connected terminal, the service which is expected to be obtained by the slice at the target base station can be considered, namely, the slice 1 can obtain normal service at the base station A, but the slice backspacing is required at the slice B. Under the condition that the signal strength of the base station A is equal to that of the base station B, the serving base station takes the base station A as a target base station preferentially. Specifically, the serving base station may select at least one candidate cell ranked in the top according to the signal quality, and then select, for the selected candidate cell, a cell corresponding to a target slice with a better expected service quality according to the slice service quality of the candidate cell, so as to perform cell handover.
Corresponding to the flow shown in fig. 4, an embodiment of the present invention further provides a communication method, as shown in fig. 5, when applied to the second base station side, including:
Here, when the second base station and the first base station exchange slice information, the slice information may be exchanged using an X2, an Xn, an S1, or an NG interface, for example, using a load balancing signaling flow of the interface. In addition, in the embodiment of the present invention, the slice information may also be carried in a handover message (such as a handover failure or a handover completion or a handover preparation or a handover command message) of an X2, Xn, S1 or an NG interface between the second base station and the first base station, so that the slice information may be sent to the source base station or the target base station through the handover message for decision making in a next handover process. Here, the next handover may not be a handover for the same terminal as the current handover. Of course, the embodiment of the present invention may also carry the slice information in the process of information interaction between the inter-system base stations, for example, in the process of information interaction between the 4G base station and the 5G base station.
In addition, the second base station may periodically transmit the slice information, or may transmit the slice information to the first base station when the following situations occur, which may include but are not limited to: slice load overload (exceeding a load threshold), slice resources below a predetermined resource threshold, and a QoS backoff indicated by slice quality of service resulting in QoS below a preset quality of service threshold, etc.
Through the steps, the embodiment of the invention realizes the interaction of the slice information among the base stations, can assist the base stations to carry out cell switching, avoids unexpected slice access failure or slice QoS (quality of service) rollback and other conditions after cell switching, improves the communication efficiency of the terminal and improves the user experience.
Based on the method, the embodiment of the invention also provides equipment for implementing the method.
Referring to fig. 6, an embodiment of the present invention provides a terminal 60, including:
a receiving module 61, configured to receive slice information of at least one cell sent by a base station, where the slice resource information includes at least one of slice load information, slice resource information, and slice service quality;
a cell selection module 62, configured to perform cell reselection or access according to the slice information of at least one cell sent by the base station.
Optionally, the slice load information is a load rate or a load interval to which the load rate belongs;
the slice resource information includes at least one of the following resources: the number of reserved carriers, the number of subcarriers, the bandwidth, the transmission resource block, the symbol and the time slot;
the slice quality of service information comprises fallback indication information for indicating that the quality of service of a slice is to be backed off when congestion occurs, wherein the quality of service comprises at least one of the following parameters: 5QI category, delay, priority or sum rate.
Optionally, the cell selection module 62 is further configured to select a target slice from first type slices of each cell according to slice information of at least one cell sent by the base station, and perform cell reselection or cell access using a cell corresponding to the target slice as a target cell, where the first type slice is a slice supported by the terminal or a slice corresponding to a service initiated by the terminal.
Optionally, the cell selection module 62 is further configured to:
selecting the slice with the lightest load rate as the target slice according to the slice load information of each slice in the first type of slices;
or selecting the slice with the highest reserved resource as the target slice according to the slice resource information of each slice in the first type of slices;
or selecting the slice with the highest idle resource as the target slice according to the slice load information and the slice resource information of each slice in the first type of slices;
or, according to the slice service quality of each slice in the first type of slices, selecting the slice with the lowest service quality backspace degree as the target slice;
or randomly selecting one slice from the first type slices as the target slice.
Optionally, the cell selection module 62 is further configured to initiate a random access on the first type slice of the target cell, and access to the first type slice.
Referring to fig. 7, another structure of a terminal according to an embodiment of the present invention is shown, in which the terminal 700 includes: a processor 701, a transceiver 702, a memory 703, a user interface 704 and a bus interface, wherein:
in this embodiment of the present invention, the terminal 700 further includes: a program stored on the memory 703 and executable on the processor 701, which when executed by the processor 701 performs the steps of:
receiving slice information of at least one cell sent by a base station, wherein the slice resource information comprises at least one of slice load information, slice resource information and slice service quality;
and performing cell reselection or access according to the slice information of at least one cell sent by the base station.
In fig. 7, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 701, and various circuits, represented by memory 703, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 702 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The user interface 704 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.
The processor 701 is responsible for managing the bus architecture and general processing, and the memory 703 may store data used by the processor 701 in performing operations.
Optionally, the slice load information is a load rate or a load interval to which the load rate belongs;
the slice resource information includes at least one of the following resources: the number of reserved carriers, the number of subcarriers, the bandwidth, the transmission resource block, the symbol and the time slot;
the slice quality of service information comprises fallback indication information for indicating that the quality of service of a slice is to be backed off when congestion occurs, wherein the quality of service comprises at least one of the following parameters: 5QI category, delay, priority or sum rate.
Optionally, when executed by the processor 703, the program may further implement the following steps:
selecting a target slice from first type slices of each cell according to slice information of at least one cell sent by the base station, and performing cell reselection or access by using a cell corresponding to the target slice as a target cell, wherein the first type slice is a slice supported by the terminal or a slice corresponding to a service initiated by the terminal.
Optionally, when executed by the processor 703, the program may further implement the following steps:
selecting the slice with the lightest load rate as the target slice according to the slice load information of each slice in the first type of slices;
or selecting the slice with the highest reserved resource as the target slice according to the slice resource information of each slice in the first type of slices;
or selecting the slice with the highest idle resource as the target slice according to the slice load information and the slice resource information of each slice in the first type of slices;
or, according to the slice service quality of each slice in the first type of slices, selecting the slice with the lowest service quality backspace degree as the target slice;
or randomly selecting one slice from the first type slices as the target slice.
Optionally, when executed by the processor 703, the program may further implement the following steps:
and when the first type slice is a slice corresponding to the service initiated by the terminal, after the target cell is reselected, initiating random access on the first type slice of the target cell, and accessing to the first type slice.
Referring to fig. 8, an embodiment of the present invention provides a structural schematic diagram of a base station 80, where the base station 80 includes:
a sending module 81, configured to send slice information of at least one cell to a terminal, where the slice resource information includes at least one of slice load information, slice resource information, and slice service quality, and the slice information is used for the terminal to perform cell reselection or cell access.
Referring to fig. 9, another schematic structural diagram of a base station according to an embodiment of the present invention includes: a processor 901, a transceiver 902, a memory 903, and a bus interface, wherein:
in this embodiment of the present invention, the base station 900 further includes: a program stored on a memory 903 and executable on a processor 901, which when executed by the processor 901 performs the steps of:
and sending slice information of at least one cell to a terminal, wherein the slice resource information comprises at least one of slice load information, slice resource information and slice service quality, and the slice information is used for the terminal to perform cell reselection or access.
In fig. 9, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 901 and various circuits of memory represented by memory 903 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 902 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.
The processor 901 is responsible for managing a bus architecture and general processing, and the memory 903 may store data used by the processor 901 in performing operations.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a base station) to execute all or part of the steps of the communication method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (15)
1. A communication method applied to a terminal is characterized by comprising the following steps:
receiving slice information of at least one cell sent by a base station, wherein the slice resource information comprises at least one of slice load information, slice resource information and slice service quality;
and performing cell reselection or access according to the slice information of at least one cell sent by the base station.
2. The method of claim 1,
the slice load information is a load rate or a load interval to which the load rate belongs;
the slice resource information includes at least one of the following resources: the number of reserved carriers, the number of subcarriers, the bandwidth, the transmission resource block, the symbol and the time slot;
the slice quality of service information comprises fallback indication information for indicating that the quality of service of a slice is to be backed off when congestion occurs, wherein the quality of service comprises at least one of the following parameters: 5QI category, delay, priority or sum rate.
3. The method of claim 1, wherein the step of performing cell reselection or cell access according to the slice information of at least one cell sent by the base station comprises:
selecting a target slice from first type slices of each cell according to slice information of at least one cell sent by the base station, and performing cell reselection or access by using a cell corresponding to the target slice as a target cell, wherein the first type slice is a slice supported by the terminal or a slice corresponding to a service initiated by the terminal.
4. The method of claim 3, wherein the step of selecting the target slice from the first type slices for each cell comprises:
selecting the slice with the lightest load rate as the target slice according to the slice load information of each slice in the first type of slices;
or selecting the slice with the highest reserved resource as the target slice according to the slice resource information of each slice in the first type of slices;
or selecting the slice with the highest idle resource as the target slice according to the slice load information and the slice resource information of each slice in the first type of slices;
or, according to the slice service quality of each slice in the first type of slices, selecting the slice with the lowest service quality backspace degree as the target slice;
or randomly selecting one slice from the first type slices as the target slice.
5. The method according to claim 3 or 4, wherein when the first type slice is a slice corresponding to a service initiated by the terminal, after reselecting to the target cell, the method further comprises:
and initiating random access on the first type of slice of the target cell, and accessing to the first type of slice.
6. A communication method applied to a base station, the method comprising:
and sending slice information of at least one cell to a terminal, wherein the slice resource information comprises at least one of slice load information, slice resource information and slice service quality, and the slice information is used for the terminal to perform cell reselection or access.
7. A terminal, comprising:
the receiving module is configured to receive slice information of at least one cell sent by a base station, where the slice resource information includes at least one of slice load information, slice resource information, and slice quality of service;
and the cell selection module is used for carrying out cell reselection or access according to the slice information of at least one cell sent by the base station.
8. A terminal comprising a transceiver and a processor, wherein,
the transceiver is configured to receive slice information of at least one cell sent by a base station, where the slice resource information includes at least one of slice load information, slice resource information, and slice quality of service;
and the processor is used for performing cell reselection or cell access according to the slice information of at least one cell sent by the base station.
9. A terminal, comprising: processor, memory and program stored on the memory and executable on the processor, which when executed by the processor implements the steps of the communication method according to any of claims 1 to 5.
10. A base station, comprising:
the system comprises a sending module, a receiving module and a processing module, wherein the sending module is used for sending slice information of at least one cell to a terminal, the slice resource information comprises at least one of slice load information, slice resource information and slice service quality, and the slice information is used for the terminal to perform cell reselection or access.
11. A base station comprising a transceiver and a processor, wherein,
the transceiver is configured to send slice information of at least one cell to a terminal, where the slice resource information includes at least one of slice load information, slice resource information, and slice service quality, and the slice information is used for the terminal to perform cell reselection or cell access.
12. A base station, comprising: processor, memory and program stored on the memory and executable on the processor, which when executed by the processor implements the steps of the communication method according to claim 6.
13. A communication method is applied to a first base station, wherein the first base station is a serving base station of a terminal, and the method comprises the following steps:
receiving slice information of at least one cell sent by a second base station, wherein the slice information comprises at least one of slice load information, slice resource information and slice service quality;
and selecting a target cell of terminal slicing and carrying out cell switching according to the slicing information of at least one cell sent by the second base station.
14. A communication method applied to a second base station, comprising:
the method comprises the steps of sending slice information of at least one cell to a first base station, wherein the slice information comprises at least one of slice load information, slice resource information and slice service quality, and the slice information is used for the first base station to carry out cell switching.
15. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, carries out the steps of the communication method according to one of claims 1 to 6.
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| PCT/CN2020/113249 WO2021043211A1 (en) | 2019-09-04 | 2020-09-03 | Communication method, terminal and base station |
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| CN201910831375.5A CN112449387A (en) | 2019-09-04 | 2019-09-04 | Communication method, terminal and base station |
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