CN107454622B - Method for configuring wireless resources, base station and user terminal - Google Patents

Method for configuring wireless resources, base station and user terminal Download PDF

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Publication number
CN107454622B
CN107454622B CN201610374522.7A CN201610374522A CN107454622B CN 107454622 B CN107454622 B CN 107454622B CN 201610374522 A CN201610374522 A CN 201610374522A CN 107454622 B CN107454622 B CN 107454622B
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base station
cell
serving cell
link
signaling
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CN107454622A (en
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孙军帅
王莹莹
陈锋
黄学艳
易芝玲
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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Priority to PCT/CN2017/086092 priority patent/WO2017206807A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/322—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by location data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0205—Traffic management, e.g. flow control or congestion control at the air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0226—Traffic management, e.g. flow control or congestion control based on location or mobility
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states

Abstract

The embodiment of the invention discloses a method for configuring wireless resources, which comprises the following steps: a base station acquires real-time position information of UE, wherein an area covered by the base station comprises at least two cells; when the base station determines that the UE moves across the cells based on the real-time position information, the base station utilizes an MAC layer protocol entity of the base station to send a wireless resource configuration signaling for realizing cell switching to the MAC layer protocol entity of the UE; the embodiment of the invention also discloses a base station and a user terminal.

Description

Method for configuring wireless resources, base station and user terminal
Technical Field
The present invention relates to radio resource allocation technologies, and in particular, to a method for allocating radio resources, a base station, and a user terminal.
Background
In a conventional wireless communication network, a time delay of a signaling flow for handover caused by movement of a user terminal is high, that is, for a cell handover flow of the user terminal, there are technical problems of high signaling overhead, prolonged signaling processing time, and the like.
Disclosure of Invention
In order to solve the foregoing technical problems, embodiments of the present invention desirably provide a method, a base station, and a User terminal for configuring radio resources, so as to reduce the frequency of a User Equipment (UE) triggering a handover process, and reduce the processing delay of air interface signaling when configuring radio resources for the UE.
The technical scheme of the invention is realized as follows:
the embodiment of the invention provides a method for configuring wireless resources, which comprises the following steps:
a base station acquires real-time position information of User Equipment (UE), wherein the area covered by the base station comprises at least two cells;
and when the base station determines that the UE moves across the cells based on the real-time position information, the base station transmits a wireless resource configuration signaling for realizing cell switching to an MAC layer protocol entity of the UE by utilizing a Media Access Control (MAC) layer protocol entity of the base station.
In this embodiment of the present invention, when the base station determines that the UE moves across cells in its coverage area based on the real-time location information, the method further includes: and controlling the wireless link between the base station and the core network to be kept unchanged.
In the embodiment of the present invention, before sending a radio resource configuration signaling for implementing cell switching to an MAC layer protocol entity of the UE, the method further includes: and configuring a serving cell of the UE, and configuring wireless resources which can be used by the serving cell for the UE.
In this embodiment of the present invention, the configuring the serving cell of the UE includes: and acquiring channel state data between the UE and the base station, and configuring a service cell of the UE based on the channel state data.
In this embodiment of the present invention, before sending a radio resource configuration signaling for implementing cell handover to an MAC layer protocol entity of the UE, the method further includes: forming an active cell set of the UE by each cell establishing a wireless link with the UE;
correspondingly, the sending the radio resource configuration signaling for implementing cell handover to the MAC layer protocol entity of the UE includes:
when the serving cell configured for the UE is in an active cell set of the UE, sending a radio resource configuration signaling to an MAC layer protocol entity of the UE, wherein the radio resource configuration signaling is a signaling for reconfiguring a radio link between the UE and the serving cell configured for the UE;
and when the serving cell configured for the UE is not in the active cell set of the UE, sending a radio resource configuration signaling to an MAC layer protocol entity of the UE, wherein the radio resource configuration signaling is a signaling for establishing a radio link between the UE and the serving cell configured for the UE.
In the embodiment of the invention, when the serving cell configured for the UE is in the active cell set of the UE and the serving cell configured for the UE is not the initial serving cell of the UE, the initial serving cell of the UE is deleted in the active cell set of the UE.
In this embodiment of the present invention, when the serving cell configured for the UE is not an initial serving cell of the UE, the method further includes: deleting a radio link between the UE and an initial serving cell of the UE.
The embodiment of the invention also provides another method for configuring wireless resources, which comprises the following steps:
when the UE determines that the UE moves across the cells, the UE receives a wireless resource configuration signaling for realizing cell switching by using an MAC layer protocol entity of the UE.
In the embodiment of the present invention, the method further includes:
when the UE determines that the received radio resource configuration signaling is signaling for reconfiguring a radio link between the UE and a serving cell configured for the UE, configuring the radio link between the UE and the serving cell configured for the UE to have the following functions: transmitting signaling and user data;
and when the UE determines that the received radio resource configuration signaling is signaling for establishing a radio link between the UE and a serving cell configured for the UE, the UE sends a request for establishing the radio link to the serving cell configured for the UE.
The embodiment of the invention also provides a base station, wherein the area covered by the base station comprises at least two cells;
the base station is used for acquiring real-time position information of the UE; and when the UE is determined to move across the cells based on the real-time position information, sending a wireless resource configuration signaling for realizing cell switching to an MAC layer protocol entity of the UE by utilizing the MAC layer protocol entity of the UE, and controlling a wireless link between the UE and a core network to be kept unchanged.
In the embodiment of the present invention, the base station is specifically configured to control a radio link between the base station and a core network to remain unchanged when determining that the UE moves across cells in a coverage area of the base station based on the real-time location information.
In this embodiment of the present invention, the base station is further configured to configure a serving cell of the UE and configure, for the UE, a radio resource that can be used by the serving cell before sending a radio resource configuration signaling for implementing cell switching to an MAC layer protocol entity of the UE.
In the embodiment of the present invention, the base station is specifically configured to acquire channel state data between the UE and the base station, and configure a serving cell of the UE based on the channel state data.
In the embodiment of the present invention, the base station is further configured to, before sending a radio resource configuration signaling for implementing cell switching to an MAC layer protocol entity of the UE, form an activated cell set of the UE with each cell establishing a radio link with the UE;
correspondingly, the base station is specifically configured to send the radio resource configuration signaling to an MAC layer protocol entity of the UE when it is determined that the serving cell configured for the UE is in the active cell set of the UE, where the radio resource configuration signaling is signaling for reconfiguring a radio link between the UE and the serving cell configured for the UE;
the base station is specifically configured to send a radio resource configuration signaling to an MAC layer protocol entity of the UE when it is determined that the serving cell configured for the UE is not in the active cell set of the UE, where the radio resource configuration signaling is a signaling for establishing a radio link between the UE and the serving cell configured for the UE.
In this embodiment of the present invention, the base station is further configured to delete the initial serving cell of the UE in the active cell set of the UE when it is determined that the serving cell configured for the UE is in the active cell set of the UE and the serving cell configured for the UE is not the initial serving cell of the UE.
In this embodiment of the present invention, the base station is further configured to delete the radio link between the UE and the initial serving cell of the UE when it is determined that the serving cell configured for the UE is not the initial serving cell of the UE.
The embodiment of the invention also provides the UE, which is characterized in that the UE is used for receiving the wireless resource configuration signaling for realizing cell switching by utilizing the MAC layer protocol entity of the UE when determining that the UE performs the cross-cell movement.
In this embodiment of the present invention, the UE is further configured to configure, when it is determined that the received radio resource configuration signaling is signaling for reconfiguring a radio link between the UE and a serving cell configured for the UE, the radio link between the UE and the serving cell configured for the UE to have the following functions: transmitting signaling and user data;
the UE is further used for sending a request for establishing a wireless link to a serving cell configured for the UE when the received wireless resource configuration signaling is determined to be signaling for establishing the wireless link between the UE and the serving cell configured for the UE.
In the method for allocating wireless resources, the base station and the user terminal provided by the embodiment of the invention, the base station acquires the real-time position information of the UE, and the area covered by the base station comprises at least two cells; when the base station determines that the UE moves across the cells based on the real-time position information, a Media Access Control (MAC) layer protocol entity of the base station sends a wireless resource configuration signaling for realizing cell switching to the MAC layer protocol entity of the UE; therefore, through the fast air interface control of the MAC layer, the processing time delay of air interface signaling when the UE is configured with the wireless resources is reduced, the reliability of the air interface is improved, and the complexity of the signaling flow is simplified.
Drawings
FIG. 1 is a diagram of a user-centric protocol stack architecture according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a method for allocating radio resources according to an embodiment of the present invention;
FIG. 3 is a block diagram illustrating an example of allocating radio resources according to the present invention;
fig. 4 is a first diagram illustrating a signaling procedure for configuring radio resources according to an embodiment of the present invention;
FIG. 5 is a second diagram illustrating a signaling procedure for configuring radio resources according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a system architecture adopted by the method for allocating radio resources according to the embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
In response to various requirements of the 5G network, the embodiment of the present invention provides a user-centric protocol stack architecture. On the basis of inheriting the advantages of a 4G protocol stack architecture, the protocol stack architecture separates a cell (cell) from a user terminal (UE), achieves the purpose that a wireless resource management system taking the cell as a unit provides proper wireless resources according to the air interface requirements of users, classifies the calculation of the cell level and the calculation of the user terminal level in a Multi-level centralized distribution (MLCD) mode respectively, and achieves a 5G network target taking the users as the center on the basis of matching the characteristics of the big data calculation capability of the cloud technology.
Fig. 1 is a schematic diagram of a user-centric protocol stack architecture according to an embodiment of the present invention, as shown in fig. 1, UEs 1 through UEn respectively represent a 1 st UE through an nth UE in a coverage area of the base station, where n is a natural number greater than 1; cell _ controller represents a Cell control module, Cell _1 to Cell _ n represent 1 st to nth cells, respectively, and Cell _2 represents 2 nd Cell; as can be seen from fig. 1, for each user terminal located in the coverage area of the same base station, the radio resources of each cell can be used, i.e. separation of cell and user terminal is achieved.
In a traditional wireless communication network, a flexible air interface (hybrid phy) cannot be provided according to an air interface environment of a user, and for a cell switching flow of a user terminal, technical problems of high signaling overhead, prolonged signaling processing and the like exist; in view of the above technical problems, embodiments of the present invention provide a method for configuring radio resources, a base station, and a user terminal on the basis of the above described novel protocol stack architecture with a user as a center, which can greatly simplify the signaling flow delay of handover when the user terminal moves, and make innovation on the premise of being compatible with the conventional handover scheme.
In the embodiment of the invention, the cell is separated from the user by combining a protocol stack architecture taking the user as a center, an air interface link is changed by combining a management mode of MCD (multi-core digital display), and a high-level link between a base station and a core network is ensured not to be modified, so that the signaling time delay generated by the configuration of wireless resources when the user terminal moves is reduced, and the reliability of the link between the user terminal and the base station is improved.
First embodiment
A first embodiment of the present invention provides a method for configuring radio resources, and fig. 2 is a flowchart illustrating the method for configuring radio resources according to the embodiment of the present invention, as shown in fig. 2, the flowchart includes:
step 201: the method comprises the steps that a base station acquires real-time position information of UE, and an area covered by the base station comprises at least two cells.
In actual implementation, the UE can obtain the location information of the UE in real time and report the location information of the UE to the corresponding base station, so that a network side device, such as the base station, can obtain the real-time location information of the UE; the UE may acquire its location information in various manners, which is not described herein again.
Here, the type of the base station is not limited, and for example, the base station may be a base station of a 3G network, and may also be an Evolved Node B (eNB) in a 4G network.
Step 202: and when the base station determines that the UE moves across the cells based on the real-time position information, the base station sends a wireless resource configuration signaling for realizing cell switching to an MAC layer protocol entity of the UE by utilizing the MAC layer protocol entity of the base station.
It is understood that the coverage area of a base station includes at least two cells; when the UE moves within the coverage area of the base station, the UE may move within one cell or may move from one cell to another cell in the coverage area of the base station.
In the prior art, when a UE moves from one cell to another cell, the UE is controlled to start a cell handover procedure, and a base station sends a cell handover command to the UE through an RRC signaling, so that a serving cell of the UE is handed over from one cell to another cell, for example, in a cell handover scheme of a Long Term Evolution (LTE) system, the handover of the entire link from the UE to a core network is controlled by the RRC signaling; here, the movement across cells by the UE may be movement across cells within the coverage area of the same base station, or movement across cells between two different base stations.
It can be seen that in the existing cell handover scheme, the handover of the entire link from the UE to the core network is implemented under a set of signaling control.
In contrast, in the embodiment of the present invention, when the UE moves from one cell to another cell in the coverage area of the same base station, the base station uses its own MAC layer protocol entity to send a radio resource configuration signaling for implementing cell handover to the MAC layer protocol entity of the UE, and keeps the radio link between the base station and the core network unchanged.
When UE moves from a cell between two different base stations, namely when the UE moves from the cell of one base station to the cell of the other base station, the MAC layer protocol entity of the UE is utilized to send a radio resource configuration signaling for realizing cell switching to the MAC layer protocol entity of the UE, and RRC signaling is utilized to initiate switching of a radio link between the base station and a core network.
It can be seen that, through the fast air interface control of the MAC layer protocol entity in the embodiments of the present invention, the frequency of the UE triggering the handover process is greatly reduced, the processing delay of the air interface signaling is reduced, the reliability of the air interface is improved, and the complexity of the signaling flow is simplified.
In this step, before sending a radio resource configuration signaling for implementing cell switching to the MAC layer protocol entity of the UE, the serving cell of the UE may also be configured; furthermore, the UE may be configured with the radio resources that can be used by the serving cell, that is, the UE may be configured with the selected radio resources from the described radio resources that can be used by the configured serving cell; for example, the area covered by the base station includes cell 1, cell 2, and cell 3, and before sending the radio resource configuration signaling to the UE, cell 1, cell 2, or cell 3 may be configured as a serving cell of the UE; the radio resources in cell 1, cell 2 or cell 3 may also be configured to the UE.
Here, the radio resource that can be used by the serving cell may be a channel resource that can be used by the serving cell, or the like.
It can be understood that, in the area covered by the base station, there is a Radio Link (RL) between at least one cell and the UE, and the Radio Link between the serving cell and the UE may not only transmit signaling but also transmit user data, while the Radio links between other cells and the UE cannot transmit user data.
Specifically, the aforementioned configuring the serving cell of the UE includes: acquiring channel state data between the UE and the base station, and configuring a service cell of the UE based on the channel state data.
Further, the channel state data between the UE and the base station may include channel state data between the UE and each cell in an area covered by the base station; the channel state data may include at least one of the following parameters: channel State Information (CSI), Reference Signal Received Power (RSRP), Received Signal Strength Indication (RSSI), Signal to Interference plus Noise Ratio (SINR), and Channel Quality Indication (CQI).
In practical implementation, the UE may monitor channel state data between the UE and the base station in real time, and report corresponding channel state data to the base station, where the channel state data between the UE and the base station may be various air interface quality monitoring parameters corresponding to the UE.
Here, the implementation manner of configuring the serving cell of the UE based on the acquired channel state data is not limited, for example, a radio link with the best channel quality may be selected from the acquired radio links between each cell and the UE, and a cell corresponding to the selected radio link may be configured as the serving cell of the UE.
In this step, before sending a radio resource configuration signaling for implementing cell switching to the MAC layer protocol entity of the UE, each cell establishing a radio link with the UE may also form an activated cell set of the UE; it can be seen that the number of cells in the active cell set of the UE is greater than or equal to 1.
The following describes an implementation of sending radio resource configuration signaling to a UE in two cases.
In the first case: the serving cell configured for the UE is in the active cell set of the UE.
The radio resource configuration signaling sent by the base station to the MAC layer protocol entity of the UE is: signaling to reconfigure a radio link between the UE and a serving cell configured for the UE; here, the purpose of reconfiguring the radio link between the UE and the serving cell configured for the UE is to: enabling a radio link between the UE and a serving cell configured for the UE to transmit signaling and user data.
For example, the area covered by the base station includes a cell 1, a cell 2, and a cell 3, where there are radio links between the three cells and the UE, the cell 1 is an initial serving cell of the UE, and the cell 2 is a serving cell configured for the UE, it is understood that the radio link between the cell 1 and the UE may be used for transmitting signaling and user data, and the radio link between the cell 2 and the UE cannot be used for transmitting user data; at this time, the base station needs to send signaling for reconfiguring the radio link between the cell 2 and the UE to the UE, so that the radio link between the cell 2 and the UE can transmit signaling and user data.
Further, if the serving cell configured for the UE is in the active cell set of the UE and the serving cell configured for the UE is not the initial serving cell of the UE, the initial serving cell of the UE is deleted from the active cell set of the UE, thereby updating the active cell set of the UE.
For example, the area covered by the base station includes cell 1, cell 2, and cell 3, and there are wireless links between these three cells and the UE, that is, cell 1, cell 2, and cell 3 are all in the active cell set of the UE; the cell 1 is an initial serving cell of the UE, and the cell 3 is a serving cell configured for the UE, and at this time, the cell 1 needs to be deleted from an active cell set of the UE.
In the second case: the serving cell configured for the UE is not in the active cell set of the UE.
The radio resource configuration signaling sent by the base station to the MAC layer protocol entity of the UE is: establishing signaling of a radio link between the UE and a serving cell configured for the UE; the purpose of establishing a radio link between a UE and a serving cell configured for the UE is to: the radio link between the UE and the serving cell configured for the UE is made available for the transmission of signaling and user data.
For example, the area covered by the base station includes cell 1, cell 2, and cell 3, where there is a radio link between cell 1, cell 2, and UE, and there is no radio link between cell 3 and UE; the cell 1 is an initial serving cell of the UE, and the cell 3 is a serving cell configured for the UE, at this time, the base station needs to send a signaling for establishing a radio link between the cell 3 and the UE to the UE, so that the radio link between the cell 3 and the UE can transmit the signaling and user data.
In any of the above cases, when the serving cell configured for the UE is not the initial serving cell of the UE, the radio link between the initial serving cells of the UE may be deleted.
Step 203: when the UE determines that the UE moves across the cells, the UE receives a wireless resource configuration signaling for realizing cell switching by using an MAC layer protocol entity of the UE.
Exemplarily, when the MAC layer protocol entity of the UE determines that the received radio resource configuration signaling is signaling for reconfiguring a radio link between the UE and a serving cell configured for the UE, the MAC layer protocol entity configures the radio link between the UE and the serving cell configured for the UE to have the following functions: transmitting signaling and user data;
when the MAC layer protocol entity of the UE determines that the received radio resource configuration signaling is signaling for establishing a radio link between the UE and a serving cell configured for the UE, a request for establishing the radio link is sent to the serving cell configured for the UE, so that the established radio link can transmit signaling and user data.
In the embodiment of the present invention, when the base station sends the Radio Resource configuration signaling to the UE, the Radio Resource configuration signaling may be generated by a Radio Resource Control (RRC) layer protocol entity of the base station, or may be generated by a Medium Access Control (MAC) layer protocol entity of the base station, which will be described below.
1) The method comprises the steps that an RRC layer protocol entity of a base station generates a radio resource configuration signaling, the generated radio resource configuration signaling is sent to an MAC layer protocol entity of the base station, then the MAC layer protocol entity of the base station sends the radio resource configuration signaling to an MAC layer protocol entity of UE, and the MAC layer protocol entity of the UE forwards the radio resource configuration signaling to the RRC layer protocol entity of the UE after confirming the reception of the radio resource configuration signaling, so that the communication between the base station and the RRC layer protocol entity of the UE is realized.
2) The MAC layer protocol entity of the base station sends a wireless resource configuration signaling to the MAC layer protocol entity of the UE, and the MAC layer protocol entity of the UE confirms to receive the wireless resource configuration signaling, so that communication between the base station and the MAC layer protocol entity of the UE is realized.
Further, after the UE performs resource allocation based on the received radio resource allocation signaling, if the UE needs to initiate an uplink synchronization process, the MAC layer protocol entities of the base station and the UE complete the uplink synchronization control process through interaction.
It can be seen that, in the embodiment of the present invention, the signaling delay when configuring radio resources is reduced through the fast air interface control of the MAC layer protocol entities of the base station and the UE.
It should be noted that when the UE moves from the coverage area of one base station to the coverage area of another base station, the cell handover procedure needs to be started; the cell handover procedure may follow the existing cell handover procedure, which is not described herein again.
By applying the method for configuring wireless resources of the first embodiment of the present invention, a base station obtains real-time location information of a user equipment UE, and an area covered by the base station includes at least two cells; the base station sends a wireless resource configuration signaling for realizing cell switching to an MAC layer protocol entity of the UE when determining that the UE moves across cells based on the real-time position information; therefore, through the fast air interface control of the MAC layer, the frequency of the UE triggering switching process is reduced, the processing time delay of air interface signaling when the UE is configured with wireless resources is reduced, the reliability of the air interface is improved, and the complexity of the signaling flow is simplified.
In addition, the embodiment of the invention can support various schemes with high real-time collaborative requirements, has good expansibility, can quickly support massive users, has good compatibility and can be compatible with a 3G/4G/5G network.
Second embodiment
To further illustrate the object of the present invention, the first embodiment of the present invention is further illustrated.
In a conventional cell handover scheme, when a UE moves across cells, cell handover is performed, and a corresponding cell handover procedure is started.
Fig. 3 is a schematic diagram of an architecture for configuring radio resources in an embodiment of the present invention, as shown in fig. 3, a core network (CN, core network) may communicate with at least one base station, where the base station may be a Cloud base station (Cloud BS); the whole wireless Link from the UE to the base station is divided into a Semi-static Link (Semi-static Link) and a Real-time Mapping Link (Real-time Mapping Link), wherein the Semi-static Link represents the wireless Link between the CN and the base station and corresponds to a data Link of the UE above an MAC layer, and the Real-time Mapping Link represents the Link between the base station and the UE and corresponds to the wireless Link of the UE at an air interface; based on a two-stage division mode of the whole wireless link from the UE to the base station, the embodiment of the invention can respectively adopt a switching scheme of an RRC level (RRC-level) and a switching scheme of an MAC level (MAC-level); here, the RRC-level switching scheme is responsible for switching control of the Semi-static link, and the MAC-level switching scheme is responsible for fast switching control of the Real-time mapping link at an air interface of a MAC Layer and a Physical Layer (PHY).
Referring to fig. 3, a coverage area of the same Cloud BS may include n cells, n being a natural number greater than 1, the n cells being denoted as cells1To Celln(ii) a In FIG. 3, the UEZDenotes a user terminal, when the UEZWhen moving among all cells in an area covered by a base station, only a Real-time Mapping (Real-time Mapping) switching scheme at an MAC level needs to be carried out, and Semi-static link switching at an RRC level does not need to be carried out, namely, any change is not needed to be carried out on Semi-static links; only UEZWhen a cell moves from the coverage area of one base station to the coverage area of another base station, the network side needs to trigger the switching of Semi-static link at the RRC level; while switching Semi-static links, the switching of Real-time Mapping links at the MAC level also needs to be completed synchronously, so as to realize the interaction of the user on air interface data. Here, the scheme for switching the Semi-static Link at the RRC level may use the existing high-level signaling control procedure and data Link switching process of the conventional LTE system, but the switching of the Real-time Mapping Link needs to use the MAC-level switching scheme; in contrast, in the handover scheme of the existing LTE system, there is no need to distinguish between Semi-static Link and Real-time Mapping Link, and all links are handed over under a set of signaling control.
In the scheme for configuring the radio resource in the embodiment of the present invention, a real-time mapping manner is adopted for mapping a logical channel (logical channel) of the UE to a transport channel-physical channel (transport-physical channel); specifically, when the UE moves across cells, if the UE does not exceed the range that the semi-static link can support (the UE is always in the coverage area of the same base station during the movement), it only needs to perform radio resource configuration in a real-time mapping manner, and does not need to start a cell handover procedure such as a 4G protocol stack.
With reference to fig. 3, the MAC layer protocol entity of the network side device (base station) is passed through the UEZReporting various air interface quality monitoring parameters, and combining self operation to give UEZConfiguring Transmission Time Interval (TTI) servletRadio resources (radio resources) which can be used in a cell and a corresponding serving cell are used, so that the fast mapping of a logical channel to the cell, then to a Carrier in the cell, and then to a transmission channel carried on the Carrier-physical channel is realized, and the inter-cell scheduling (without adopting a Carrier Aggregation (CA) technology) or in a self-organization (self organization) mode by an inter-cell MAC (adopting the CA technology) is realized in the same base station without needing a traditional LTE protocol stack or only carrying out cell switching.
It can be seen that the radio resource configuration method of the embodiment of the present invention reduces the frequency of the UE triggering the cell switching process, reduces the processing delay of the air interface signaling, improves the reliability of the air interface, simplifies the complexity of the signaling flow, and realizes the flexible control of the 5G flexible air interface.
The following describes a method for configuring radio resources when a UE moves between all cells in an area covered by a base station in detail with reference to the accompanying drawings.
Fig. 4 is a first schematic diagram of a signaling procedure for configuring radio resources according to an embodiment of the present invention, as shown in fig. 4, the signaling procedure includes:
step a: a Base Station (Base Station) RRC layer protocol entity generates a radio resource configuration signaling, and sends the radio resource configuration signaling to a Base Station MAC layer protocol entity, where the radio resource configuration signaling may be sent in the form of an indication signaling (Ho Ind).
Step b: the MAC layer protocol entities of the base station and the UE complete the transceiving and acknowledgement of radio resource configuration signaling through a hybrid automatic Repeat reQuest (HARQ) process.
Here, in a Downlink (DL) direction from the base station to the UE, the MAC layer protocol entities of the base station and the UE may implement signaling transmission through a Physical Downlink Control Channel (PDCCH order), a PDCCH, or a Physical Downlink Shared Channel (PDSCH), and in an Uplink (UL) direction from the UE to the base station, signaling transmission may be implemented through a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH).
Step c: after receiving the radio resource configuration signaling, the MAC layer protocol entity of the UE sends a radio resource configuration request (HO Req) to the RRC layer protocol entity of the UE.
Step d: after receiving the radio resource configuration request, the RRC layer protocol entity of the UE sends a radio resource configuration indication to the MAC layer protocol entity of the UE, where the radio resource configuration indication may be sent in the form of an indication signaling (Ho Ind).
Step e: after receiving the radio resource configuration indication, the MAC layer protocol entity of the UE sends an uplink synchronization signaling (see UL Time Alignment in fig. 4) to the MAC layer protocol entity of the base station if uplink synchronization with the base station is required.
Step f: the MAC layer protocol entity of the base station sends the acknowledgement information (HO Ack) of the radio resource configuration signaling to the RRC layer protocol entity of the base station.
Fig. 5 is a second schematic diagram of a signaling procedure for configuring radio resources in this embodiment of the present invention, as shown in fig. 5, S _ phy (source phy) indicates a physical layer protocol entity of an initial serving Cell of a UE, S _ Intra Cell MAC (source Intra Cell MAC) indicates a MAC layer protocol entity of the initial serving Cell of the UE, D _ phy (Destination phy) indicates a physical layer protocol entity of the serving Cell configured for the UE, D _ Intra Cell MAC (Destination Intra Cell MAC) indicates a MAC layer protocol entity of the serving Cell configured for the UE, inter MAC indicates a MAC layer protocol entity between cells, pdcp (packet Data Convergence protocol)/rlc (radio Link control) indicates a packet Data Convergence protocol/radio Link control protocol entity of a base station, and RRC indicates an RRC layer protocol entity of the base station.
With reference to fig. 5, corresponding steps may be performed for two actual scenarios, namely, scenario 1 and scenario 2, where in scenario 1, a serving Cell (D _ Cell) configured for a UE belongs to an active Cell set (CellSet) of the UE; in scenario 2, the serving Cell (D _ Cell) configured for the UE does not belong to the active Cell Set (Cell Set) of the UE.
For scenario 1, signaling for reconfiguring a radio link between the UE and a serving Cell configured for the UE is sent to the UE, an active Cell set of the UE is updated, and an initial serving Cell (S _ Cell) of the UE is deleted from the active Cell set of the UE.
For scenario 2, it is necessary for the UE and the serving cell configured for the UE to complete uplink and downlink synchronization, so as to implement data transmission between the UE and the serving cell configured for the UE.
Referring to fig. 5, a signaling interaction procedure for configuring radio resources in the embodiment of the present invention includes steps 1 to 14; here, for scenario 1, step 1 to step 6 are performed, and for scenario 2, step 1, and step 7 to step 14 are performed.
The signaling interaction flow for configuring radio resources shown in fig. 5 includes the following steps:
step 1: and the RRC layer protocol entity of the base station sends a radio resource configuration signaling to the InterCell MAC, wherein the form of the radio resource configuration signaling is indication signaling (HO Ind).
In this step, the radio resource configuration signaling carries indication information for indicating whether the D _ Cell already exists in the CellSet of the UE; if the D _ Cell already exists in the Cell Set of the UE, the indication information is signaling indication information required by the scene 1; if the D _ Cell does not exist in the Cell Set of the UE, the indication information is signaling indication information required by the scenario 2.
Step 2: the Intercell MAC sends an indication message for updating the activated Cell set (Cell Update of UE) of the UE to a D _ Intracell MAC (Destination Intracell MAC: MAC function entity in the Destination Cell).
That is, the indication message of the Cell Update of the UE is used to indicate an active Cell set for updating the UE.
And step 3: and the D _ IntraCell MAC sends the PDCCH order to the D _ PHY based on the received indication message, the specific format of the PDCCH order sent by the D _ IntraCell MAC can be redefined by the D _ IntraCell MAC, and the PDCCH order sent by the D _ IntraCell MAC is used for indicating the D _ PHY to send a radio resource configuration signaling to the UE through the PDCCH.
And 4, step 4: the D _ PHY transmits a radio resource configuration signaling to the UE through the PDCCH, that is, the D _ PHY transmits the radio resource configuration signaling through the UE over the air interface.
And 5: the InterCell MAC sends confirmation information of the completed radio resource configuration to an RRC layer protocol entity of the base station, and the confirmation information sent by the InterCell MAC to the RRC layer protocol entity of the base station is in the form of confirmation response information (HOACK).
Step 6: after receiving the confirmation information, the RRC layer protocol entity of the base station sends a radio link deletion (RL Delete) message to the InterCell MAC, the S _ IntraCell MAC and the S _ PHY respectively so as to release the UE context information established on the S _ IntraCell MAC and the S _ PHY.
And 7: the inter Cell MAC sends HO Info indication information to the S _ Intra Cell MAC, and the HO Info indication information is used for starting a wireless resource configuration signaling process by the S _ Intra Cell MAC.
And 8: the RRC layer protocol entity of the base station sends a radio link Setup (RL Setup) message to the inter Cell MAC, the D _ Intra Cell MAC, and the D _ PHY, respectively, to establish UE context information on the D _ Intra Cell MAC and the D _ PHY.
And step 9: the S _ Intra Cell MAC sends a PDCCH order to the S _ PHY;
in this step, the specific format of the PDCCH order may be redefined by S _ IntraCell MAC, and the PDCCH order is used to instruct the S _ PHY to send a radio resource configuration signaling to the UE through the PDCCH.
Further, the S _ Intra Cell MAC may also send a PDSCH order to the S _ PHY, where the PDSCH order is used to instruct the S _ PHY to send radio resource configuration signaling to the UE through the PDSCH.
Step 10: the S _ PHY transmits a radio resource configuration signaling to the UE through the PDCCH, that is, the S _ PHY transmits the radio resource configuration signaling through the air interface UE. At this time, whether the PDSCH is required to be used for transmission can be determined according to the size of the HO Info indication message, and if the HO Info indication message is an indication message with a plurality of bits, the HO Info indication message can be completed by defining a new format of PDCCH Order; if several tens bytes, or even larger data length, are needed, then PDCCH + PDSCH and normal HARQ process transmission are used;
the MAC PDU herein denotes a MAC layer protocol data unit.
Step 11: after receiving a radio resource configuration signaling sent by the PDCCH or PDCCH + PDSCH from the air interface, the UE initiates an uplink and downlink synchronization process to the D _ PHY and the D _ IntraCell MAC, where the process may be a conventional random access process, a simplified random access process, or another synchronization process that does not require a random access process.
Step 12: and D _ IntraCell MAC sends confirmation information of finished wireless resource allocation to the InterCell MAC after finishing the uplink and downlink synchronization process, wherein the confirmation information sent to the InterCell MAC by the D _ IntraCell MAC is in the form of a confirmation response information (HO ACK).
Step 13: the inter cell MAC forwards the acknowledgement information of the radio resource configuration to the RRC layer protocol entity of the base station, and the acknowledgement information sent by the inter cell MAC to the RRC layer protocol entity of the base station is in the form of acknowledgement response information (HOACK).
Step 14: after receiving the confirmation information, the RRC layer protocol entity of the base station sends a radio link deletion (RL Delete) message to the InterCell MAC, the S _ IntraCell MAC and the S _ PHY respectively so as to release the UE context information established on the S _ IntraCell MAC and the S _ PHY.
In fig. 5, the messages sent in steps 4, 10, and 11 are messages sent by the Uu port (Msg in Uu), the Signaling flow in steps 1, 6, 8, and 14 is an inter-Signaling Msg in base station (active Msg in base station), and the Signaling sent in steps 2, 3, 5, 7, 9, 11, 12, and 13 is Signaling in base station (Signaling in base station).
Third embodiment
On the basis of the first and second embodiments of the present invention, a third embodiment of the present invention provides a base station.
Fig. 6 is a schematic diagram of a system architecture adopted by a method for configuring radio resources according to an embodiment of the present invention, as shown in fig. 6, the system architecture includes a base station 610 and a UE620, and an area covered by the base station 610 includes at least two cells.
The base station 610 is configured to obtain real-time location information of the UE 620; and when determining that the UE620 moves across the cells based on the real-time position information, sending a radio resource configuration signaling for realizing cell switching to an MAC layer protocol entity of the UE.
Specifically, the base station 610 is configured to control a radio link between itself and a core network to remain unchanged when determining that the UE620 moves across cells in its coverage area based on the real-time location information.
Further, the base station 610 is further configured to configure a serving cell of the UE620 and configure a radio resource that can be used by the serving cell for the UE before sending a radio resource configuration signaling for implementing cell handover to the MAC layer protocol entity of the UE 620.
Specifically, the base station 610 is configured to acquire channel state data between the UE620 and the base station 610, and configure a serving cell of the UE620 based on the acquired channel state data.
Further, the base station 610 is further configured to, before sending a radio resource configuration signaling for implementing cell handover to the MAC layer protocol entity of the UE620, form an active cell set of the UE with each cell establishing a radio link with the UE 620.
Accordingly, the base station 610 is specifically configured to send the radio resource configuration signaling to a MAC layer protocol entity of the UE620 when it is determined that the serving cell configured for the UE620 is in the active cell set of the UE620, where the radio resource configuration signaling is signaling for reconfiguring a radio link between the UE620 and the serving cell configured for the UE 620;
the base station 610 is specifically configured to send a radio resource configuration signaling to a MAC layer protocol entity of the UE620 when it is determined that the serving cell configured for the UE620 is not in the active cell set of the UE620, where the radio resource configuration signaling is a signaling for establishing a radio link between the UE620 and the serving cell configured for the UE 620.
Here, the base station 610 is further configured to delete the initial serving cell of the UE620 from the active cell set of the UE620 when it is determined that the serving cell configured for the UE620 is in the active cell set of the UE620 and the serving cell configured for the UE620 is not the initial serving cell of the UE 620.
The base station 610 is further configured to delete the radio link between the UE620 and the initial serving cell of the UE620 when it is determined that the serving cell configured for the UE620 is not the initial serving cell of the UE 620.
Fourth embodiment
On the basis of the first and second embodiments of the present invention, a fourth embodiment of the present invention provides a UE.
Referring to fig. 6, the UE620 is configured to receive radio resource configuration signaling for implementing cell handover by using a MAC layer protocol entity when determining to move itself across cells.
Further, the UE620 is further configured to configure the radio link between the UE620 and the serving cell configured for the UE620 to have the following functions when it is determined that the received radio resource configuration signaling is signaling for reconfiguring the radio link between the UE620 and the serving cell configured for the UE 620: and transmitting signaling and user data.
The UE620 is further configured to send a request for establishing a radio link to a serving cell configured for the UE620 when it is determined that the received radio resource configuration signaling is signaling for establishing a radio link between the UE620 and the serving cell configured for the UE 620.
Those skilled in the art will appreciate that the implementation functions of the base station and the UE shown in fig. 6 can be understood by referring to the foregoing description of the method for configuring radio resources.
The technical schemes described in the embodiments of the present invention can be combined arbitrarily without conflict.
In the embodiments provided in the present invention, it should be understood that the disclosed method and intelligent device may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.
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, that is, 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.
In addition, all the functional units in the embodiments of the present invention may be integrated into one second processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
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.

Claims (14)

1. A method for configuring radio resources, the method comprising:
a base station acquires real-time position information of User Equipment (UE), wherein the area covered by the base station comprises at least two cells;
when the base station determines that the UE moves across the cells based on the real-time position information, a Media Access Control (MAC) layer protocol entity of the base station sends a wireless resource configuration signaling for realizing cell switching to the MAC layer protocol entity of the UE;
wherein, when the base station determines that the UE moves across cells in the coverage area of the base station based on the real-time location information, the method further comprises: keeping the semi-static link unchanged, and switching the MAC-level real-time mapping link; the semi-static link refers to a wireless link between a core network and a base station and corresponds to a data link of the UE above an MAC layer; the real-time mapping link refers to a wireless link between a base station and the UE and corresponds to a wireless link of the UE at an air interface; the semi-static link and the real-time mapping link are obtained on the basis of separation of a cell and a user terminal;
before the base station utilizes the MAC layer protocol entity of the base station to send the wireless resource configuration signaling to the MAC layer protocol entity of the UE, a service cell is configured for the UE; and if the service cell is not in the activated cell set of the UE, receiving an uplink synchronization process initiated by the UE, and finishing the uplink synchronization control process by the MAC layer of the base station and the MAC layer of the UE through interaction.
2. The method of claim 1, wherein before sending radio resource configuration signaling to a MAC layer protocol entity of the UE to perform cell handover, the method further comprises: and configuring a serving cell of the UE, and configuring wireless resources which can be used by the serving cell for the UE.
3. The method of claim 2, wherein the configuring the serving cell of the UE comprises: and acquiring channel state data between the UE and the base station, and configuring a service cell of the UE based on the channel state data.
4. The method of claim 2, wherein before sending radio resource configuration signaling to a MAC layer protocol entity of the UE to effect cell handover, the method further comprises: forming an active cell set of the UE by each cell establishing a wireless link with the UE;
correspondingly, the sending the radio resource configuration signaling for implementing cell handover to the MAC layer protocol entity of the UE includes:
when the serving cell configured for the UE is in an active cell set of the UE, sending a radio resource configuration signaling to an MAC layer protocol entity of the UE, wherein the radio resource configuration signaling is a signaling for reconfiguring a radio link between the UE and the serving cell configured for the UE;
and when the serving cell configured for the UE is not in the active cell set of the UE, sending a radio resource configuration signaling to an MAC layer protocol entity of the UE, wherein the radio resource configuration signaling is a signaling for establishing a radio link between the UE and the serving cell configured for the UE.
5. The method of claim 4, wherein the initial serving cell of the UE is deleted from the active cell set of the UE when the serving cell configured for the UE is in the active cell set of the UE and the serving cell configured for the UE is not the initial serving cell of the UE.
6. The method according to any of claims 2 to 5, wherein when the serving cell configured for the UE is not an initial serving cell of the UE, the method further comprises: deleting a radio link between the UE and an initial serving cell of the UE.
7. A method for configuring radio resources, the method comprising:
when a user terminal UE determines that the UE per se carries out cross-cell movement, a media access control MAC layer protocol entity per se is utilized to receive a wireless resource configuration signaling for realizing cell switching, and when the UE is in the coverage area of the same base station and moves in a cross-cell manner, a wireless link between the base station and a core network is unchanged;
when the UE determines that the received radio resource configuration signaling is signaling for reconfiguring a radio link between the UE and a serving cell configured for the UE, configuring the radio link between the UE and the serving cell configured for the UE to have the following functions: transmitting signaling and user data;
when the UE determines that the received radio resource configuration signaling is signaling for establishing a radio link between the UE and a serving cell configured for the UE, the UE sends a request for establishing the radio link to the serving cell configured for the UE;
and if the service cell is not in the activated cell set of the UE, the MAC layer of the UE sends an uplink synchronous signaling to the MAC layer of the base station.
8. A base station, characterized in that the area covered by the base station comprises at least two cells;
the base station is used for acquiring real-time position information of the user terminal UE; when the UE is determined to move across the cells based on the real-time position information, a Media Access Control (MAC) layer protocol entity of the UE is used for sending a wireless resource configuration signaling for realizing cell switching to the MAC layer protocol entity of the UE; the base station controls a semi-static link to be unchanged and performs real-time mapping link switching at an MAC level when determining that the UE performs cross-cell movement in a coverage area of the base station based on the real-time position information; the semi-static link refers to a wireless link between a core network and a base station and corresponds to a data link of the UE above an MAC layer; the real-time mapping link refers to a wireless link between a base station and the UE and corresponds to a wireless link of the UE at an air interface; the semi-static link and the real-time mapping link are obtained on the basis of separation of a cell and a user terminal;
before the base station utilizes the MAC layer protocol entity of the base station to send the wireless resource configuration signaling to the MAC layer protocol entity of the UE, a service cell is configured for the UE;
and if the service cell is not in the activated cell set of the UE, receiving an uplink synchronization process initiated by the MAC layer of the UE, and finishing the uplink synchronization control process by the MAC layers of the base station and the UE through interaction.
9. The base station of claim 8, wherein the base station is further configured to configure a serving cell of the UE and configure radio resources that can be used by the serving cell for the UE before sending a radio resource configuration signaling for implementing cell handover to a MAC layer protocol entity of the UE.
10. The base station of claim 9, wherein the base station is specifically configured to obtain channel state data between the UE and the base station, and configure a serving cell of the UE based on the channel state data.
11. The base station of claim 9, wherein the base station is further configured to, before sending the radio resource configuration signaling for implementing cell handover to the MAC layer protocol entity of the UE, form each cell establishing a radio link with the UE into an active cell set of the UE;
correspondingly, the base station is specifically configured to send the radio resource configuration signaling to an MAC layer protocol entity of the UE when it is determined that the serving cell configured for the UE is in the active cell set of the UE, where the radio resource configuration signaling is signaling for reconfiguring a radio link between the UE and the serving cell configured for the UE;
the base station is specifically configured to send a radio resource configuration signaling to an MAC layer protocol entity of the UE when it is determined that the serving cell configured for the UE is not in the active cell set of the UE, where the radio resource configuration signaling is a signaling for establishing a radio link between the UE and the serving cell configured for the UE.
12. The base station of claim 11, wherein the base station is further configured to delete the initial serving cell of the UE from the active cell set of the UE when it is determined that the serving cell configured for the UE is in the active cell set of the UE and the serving cell configured for the UE is not the initial serving cell of the UE.
13. The base station according to any of claims 9 to 12, wherein the base station is further configured to delete the radio link between the UE and the initial serving cell of the UE when it is determined that the serving cell configured for the UE is not the initial serving cell of the UE.
14. A user terminal UE is characterized in that the UE is used for receiving a radio resource configuration signaling for realizing cell switching by using a self media access control MAC layer protocol entity when determining that the UE performs cross-cell movement, and when the UE is in the coverage area of the same base station and moves in a cross-cell manner, a radio link between the base station and a core network is unchanged;
the UE is further used for configuring a wireless link between the UE and a serving cell configured for the UE to have the following functions when the received wireless resource configuration signaling is determined to be signaling for reconfiguring the wireless link between the UE and the serving cell configured for the UE: transmitting signaling and user data;
the UE is also used for sending a request for establishing a wireless link to a serving cell configured for the UE when the received wireless resource configuration signaling is determined to be signaling for establishing the wireless link between the UE and the serving cell configured for the UE;
and if the service cell is not in the activated cell set of the UE, the MAC layer of the UE sends an uplink synchronous signaling to the MAC layer of the base station.
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