CN110611918A - Method and device for configuring uplink carrier in carrier aggregation and base station - Google Patents

Method and device for configuring uplink carrier in carrier aggregation and base station Download PDF

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Publication number
CN110611918A
CN110611918A CN201810614792.XA CN201810614792A CN110611918A CN 110611918 A CN110611918 A CN 110611918A CN 201810614792 A CN201810614792 A CN 201810614792A CN 110611918 A CN110611918 A CN 110611918A
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China
Prior art keywords
carrier
uplink
connection reconfiguration
reconfiguration message
uplink carrier
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Granted
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CN201810614792.XA
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Chinese (zh)
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CN110611918B (en
Inventor
范晨
袁乃华
徐绍君
魏立梅
朱玉梅
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Chengdu Dingqiao Communication Technology Co Ltd
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Chengdu Dingqiao Communication Technology Co Ltd
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Priority to CN201810614792.XA priority Critical patent/CN110611918B/en
Publication of CN110611918A publication Critical patent/CN110611918A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0096—Indication of changes in allocation
    • H04L5/0098—Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/06—Reselecting a communication resource in the serving access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment

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

Abstract

The embodiment of the invention discloses a method, a device and a base station for configuring uplink carriers in carrier aggregation, wherein the method comprises the following steps: the source base station judges whether the carrier switching condition of the terminal equipment is met; if so, the source base station sends a Radio Resource Control (RRC) connection reconfiguration message to the terminal equipment so that the terminal equipment sends data on a target uplink carrier in at least one first uplink carrier indicated by the RRC connection reconfiguration message, wherein the RRC connection reconfiguration message includes information of the at least one first uplink carrier, and the first uplink carrier is an uplink carrier except an uplink carrier pre-paired with a downlink carrier, so as to realize switching of the uplink carriers.

Description

Method and device for configuring uplink carrier in carrier aggregation and base station
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a method, a device and a base station for configuring an uplink carrier in carrier aggregation.
Background
To meet the peak rate per user and system capacity increase, one of the most straightforward approaches is to increase the system transmission bandwidth. Therefore, a Long Term Evolution (Long Term Evolution Advanced, LTE-Advanced for short) system introduces a technology of increasing transmission bandwidth, that is, CA (Carrier Aggregation). In some industrial network applications, the uplink service requirement is greater than the downlink service requirement, so in order to better meet a large amount of uplink service requirements, an asymmetric uplink carrier aggregation technology in which the number of uplink carriers is greater than the number of downlink carriers is provided.
In the asymmetric uplink carrier aggregation technology, a carrier aggregation cluster is composed of a unique downlink carrier and at least two uplink carriers. However, in the existing 3GPP carrier aggregation, each downlink carrier can only be paired with 0 or 1 uplink carrier. The pairing relationship between the downlink carrier and the uplink carrier of each cell is predefined in the 36.101 protocol and cannot be changed.
Disclosure of Invention
The embodiment of the invention provides a method, a device and a base station for configuring an uplink carrier in carrier aggregation.
In a first aspect, an embodiment of the present invention provides a method for configuring an uplink carrier in carrier aggregation, including:
the source base station judges whether the carrier switching condition of the terminal equipment is met;
if so, the source base station sends a Radio Resource Control (RRC) connection reconfiguration message to the terminal equipment, so that the terminal equipment sends data on a target uplink carrier in at least one first uplink carrier indicated by the RRC connection reconfiguration message, wherein the RRC connection reconfiguration message includes information of the at least one first uplink carrier, and the first uplink carrier is an uplink carrier except an uplink carrier pre-paired with a downlink carrier.
In a possible implementation manner of the first aspect, the carrier switching condition of the terminal device includes: in the same cell, the source base station performs load balancing among a plurality of uplink carriers, or the uplink service requirement of the terminal equipment meets a preset threshold;
the source base station sends the RRC connection reconfiguration message to the terminal equipment, and the RRC connection reconfiguration message comprises the following steps:
and the source base station sends the RRC connection reconfiguration message to the terminal equipment, wherein the RRC connection reconfiguration message comprises the identifier of the source cell, the cell radio network temporary identifier of the source cell and the information of at least one first uplink carrier of the source cell.
In another possible implementation manner of the first aspect, the sending, by the source base station, the RRC connection reconfiguration message to the terminal device includes:
if the terminal equipment supports a downlink carrier and an uplink carrier, the source base station determines a first uplink carrier as the target uplink carrier from N first uplink carriers, wherein N is a positive integer;
and the source base station sends the RRC connection reconfiguration message to the terminal equipment, wherein the RRC connection reconfiguration message comprises the information of the target uplink carrier.
In another possible implementation manner of the first aspect, the sending, by the source base station, the RRC connection reconfiguration message to the terminal device includes:
if the terminal equipment supports one downlink carrier and M uplink carriers, the source base station determines M first uplink carriers from N first uplink carriers, wherein N and M are positive integers, and N is greater than or equal to M;
and the source base station sends the RRC connection reconfiguration message to the terminal equipment, wherein the RRC connection reconfiguration message comprises the information of the M first uplink carriers.
In another possible implementation manner of the first aspect, the carrier switching condition includes: the terminal equipment is switched among different cells;
the source base station sends the RRC connection reconfiguration message to the terminal equipment, and the RRC connection reconfiguration message comprises the following steps:
and the source base station sends the RRC connection reconfiguration message to the terminal equipment, wherein the RRC connection reconfiguration message comprises an identifier of a target cell, a cell radio network temporary identifier of the target cell and configuration information of at least one first uplink carrier of the target cell.
In another possible implementation manner of the first aspect, before the source base station sends the RRC connection reconfiguration message to the terminal device, the method further includes:
and the source base station receives the RRC connection reconfiguration message sent by the target cell.
In another possible implementation manner of the first aspect, the mobile control information of the RRC connection reconfiguration message includes information of the at least one first uplink carrier.
In another possible implementation manner of the first aspect, the configuration information of the first uplink carrier includes a bandwidth, a frequency band, and configuration information of the first uplink carrier.
In a second aspect, an embodiment of the present invention provides a device for configuring an uplink carrier in carrier aggregation, including:
the judging module is used for judging whether the carrier switching condition of the terminal equipment is met or not;
a sending module, configured to send a radio resource control, RRC, connection reconfiguration message to the terminal device when the determining module determines that a carrier switching condition of the terminal device is met, so that the terminal device sends data on a target uplink carrier in at least one first uplink carrier indicated by the RRC connection reconfiguration message, where the RRC connection reconfiguration message includes information of the at least one first uplink carrier, and the first uplink carrier is an uplink carrier other than an uplink carrier pre-paired with a downlink carrier.
In one possible implementation of the second aspect,
the carrier switching condition of the terminal equipment comprises the following steps: in the same cell, the source base station performs load balancing among a plurality of uplink carriers, or the uplink service requirement of the terminal equipment meets a preset threshold;
the sending module is specifically configured to send the RRC connection reconfiguration message to the terminal device, where the RRC connection reconfiguration message includes the identifier of the source cell, the cell radio network temporary identifier of the source cell, and information of at least one first uplink carrier of the source cell.
In another possible implementation manner of the second aspect, the sending module includes a first determining unit and a first sending unit;
the first determining unit is configured to determine, if the terminal device supports one downlink carrier and one uplink carrier, one first uplink carrier as the target uplink carrier from N first uplink carriers, where N is a positive integer;
the first sending unit is configured to send the RRC connection reconfiguration message to the terminal device, where the RRC connection reconfiguration message includes information of the target uplink carrier.
In another possible implementation manner of the second aspect, the sending module includes a second determining unit and a second sending unit;
the second determining unit is configured to determine M first uplink carriers from N first uplink carriers if the terminal device supports one downlink carrier and M uplink carriers, where N and M are positive integers, and N is greater than or equal to M;
the second sending unit is configured to send the RRC connection reconfiguration message to the terminal device, where the RRC connection reconfiguration message includes information of the M first uplink carriers.
In another possible implementation form of the second aspect,
the carrier switching condition includes: the terminal equipment is switched among different cells;
the sending module is specifically configured to send, by the source base station, the RRC connection reconfiguration message to the terminal device, where the RRC connection reconfiguration message includes an identifier of a target cell, a cell radio network temporary identifier of the target cell, and configuration information of at least one first uplink carrier of the target cell.
In another possible implementation manner of the second aspect, the apparatus further includes:
a receiving module, configured to receive the RRC connection reconfiguration message sent by the target cell.
In another possible implementation manner of the second aspect, the mobile control information of the RRC connection reconfiguration message includes information of the at least one first uplink carrier.
In another possible implementation manner of the second aspect, the configuration information of the first uplink carrier includes a bandwidth, a frequency band, and configuration information of the first uplink carrier.
In a third aspect, an embodiment of the present invention provides a base station, including:
a memory for storing a computer program;
a processor, configured to execute the computer program to implement the method for configuring an uplink carrier in carrier aggregation according to the first aspect.
In a fourth aspect, an embodiment of the present invention provides a computer storage medium, where a computer program is stored in the storage medium, and when the computer program is executed, the method for configuring an uplink carrier in carrier aggregation according to the first aspect is implemented.
According to the method, the device and the base station for configuring the uplink carriers in carrier aggregation provided by the embodiment of the invention, whether the carrier switching condition of the terminal equipment is met is judged through the source base station, if yes, the source base station sends a Radio Resource Control (RRC) connection reconfiguration message to the terminal equipment so that the terminal equipment sends data on a target uplink carrier in at least one first uplink carrier indicated by the RRC connection reconfiguration message, wherein the RRC connection reconfiguration message comprises information of the at least one first uplink carrier, and the first uplink carrier is an uplink carrier except an uplink carrier pre-paired with a downlink carrier, so that the switching of the uplink carriers is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of asymmetric uplink carrier aggregation according to an embodiment of the present invention;
fig. 2 is an exploded view of asymmetric uplink carrier aggregation according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a carrier aggregation cluster for asymmetric uplink carrier aggregation according to an embodiment of the present invention;
fig. 4 is a flowchart of a method for configuring an uplink carrier in carrier aggregation according to an embodiment of the present invention;
fig. 5 is a flowchart of a first configuration method for an uplink carrier in carrier aggregation according to a second embodiment of the present invention;
fig. 6 is a schematic configuration diagram of an uplink carrier according to a second embodiment of the present invention;
fig. 7 is a flowchart of a second configuration method for an uplink carrier in carrier aggregation according to a second embodiment of the present invention;
fig. 8 is a schematic configuration diagram of another uplink carrier according to a second embodiment of the present invention;
fig. 9 is a flowchart of a method for configuring an uplink carrier in carrier aggregation according to a third embodiment of the present invention;
fig. 10 is a flowchart of a method for configuring an uplink carrier in carrier aggregation according to a fourth embodiment of the present invention;
fig. 11 is a schematic structural diagram of an apparatus for configuring an uplink carrier in carrier aggregation according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a configuration apparatus for an uplink carrier in carrier aggregation according to a second embodiment of the present invention;
fig. 13 is a schematic structural diagram of a configuration apparatus for an uplink carrier in carrier aggregation according to a second embodiment of the present invention;
fig. 14 is a schematic structural diagram of a configuration apparatus for an uplink carrier in carrier aggregation according to a third embodiment of the present invention;
fig. 15 is a schematic structural diagram of a base station according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The method for configuring the uplink carrier in the carrier aggregation provided by the embodiment of the invention is suitable for a carrier aggregation scene in which the uplink carrier is more than the downlink carrier.
In this embodiment, when determining that the carrier switching condition of the terminal device is satisfied, the base station sends an RRC connection reconfiguration message to the terminal device, so that the terminal device sends data on a target uplink carrier indicated by the RRC connection reconfiguration message, thereby implementing uplink carrier switching.
Fig. 1 is a schematic diagram of asymmetric uplink carrier aggregation according to an embodiment of the present invention, fig. 2 is a schematic diagram of dissymmetrical uplink carrier aggregation decomposition according to an embodiment of the present invention, and fig. 3 is a schematic diagram of a carrier aggregation cluster according to asymmetric uplink carrier aggregation according to an embodiment of the present invention. In this embodiment, the number of uplink carriers in carrier aggregation is greater than the number of downlink carriers, and as shown in fig. 1, the carrier aggregation includes P downlink carriers and Q uplink carriers, where P and Q are both positive integers and P is less than or equal to Q, and as shown in fig. 2, the carrier aggregation includes at least one carrier aggregation cluster, that is, all uplink carriers and downlink carriers may be decomposed into multiple carrier aggregation clusters, as shown in fig. 3, each carrier aggregation cluster includes one downlink primary carrier and multiple (for example, K) uplink carriers, where the K uplink carriers include 1 uplink primary carrier, and K-1 uplink carriers, excluding the uplink primary carrier, in the K uplink carriers are uplink secondary carriers, where K is an integer greater than or equal to 2.
Optionally, the aggregated K uplink carriers may be at least one of the following carriers: continuous carriers within the same frequency band, non-continuous carriers within the same frequency band, and carriers in different frequency bands.
The terminal equipment UE in CA supports asymmetric carrier aggregation, i.e. the number of component carriers aggregated for downlink and uplink may be different, i.e. the number of uplink carriers is greater than the number of downlink carriers.
The following is a description of related concepts in 3GPP (3rd Generation Partnership Project) carrier aggregation:
a PCell (Primary Cell) is a Cell where the UE performs initial connection establishment, or performs RRC (Radio Resource Control) connection reestablishment, or is a Primary Cell designated in a handover process. The PCell is responsible for RRC communication with the UE. The Carrier cell corresponding to the PCell is called PCC (primary component Carrier). The downlink carrier of the PCell is referred to as DL PCC, and the uplink carrier of the PCell is referred to as UL PCC.
SCell (Secondary Cell) is added at RRC reconfiguration to provide additional radio resources, without any RRC communication between SCell and UE. The Carrier element corresponding to the SCell is referred to as SCC (secondary Carrier element). Herein, a downlink carrier of the SCell is referred to as DL SCC, and an uplink carrier of the SCell is referred to as UL SCC.
The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 4 is a flowchart of a method for configuring an uplink carrier in carrier aggregation according to an embodiment of the present invention. As shown in fig. 4, the method of this embodiment may include:
s101, the source base station judges whether the carrier switching condition of the terminal equipment is met.
The main execution body of this embodiment is the source base station, that is, the base station of the source cell where the terminal device is currently located.
Since the number of uplink carriers of the source cell is greater than the number of downlink carriers, the source cell includes one downlink carrier and a plurality of uplink carriers, for example.
And when the source base station judges that the carrier switching condition of the terminal equipment is met, determining the uplink carrier of the terminal equipment to switch.
In practical use, the switching of uplink carriers of the terminal equipment includes two situations:
the first is that the cell in which the terminal device is located is unchanged, that is, the uplink carrier and the downlink carrier of the terminal device are switched in the same cell.
The carrier switching condition of the terminal device may be, for example, the capability of the terminal device, a carrier load state, signal quality or an error rate. For example, when the load of a certain uplink carrier is high, the signal quality of the uplink carrier is poor, or the error rate is high, the terminal device needs to be switched to a new uplink carrier to achieve the purpose of offloading.
Optionally, the carrier switching condition of the terminal device may also be that the source base station performs load balancing among multiple uplink carriers, or that an uplink service requirement of the terminal device meets a preset threshold.
The second is that the terminal device performs handover between different cells, that is, the terminal device is handed over from the source cell to the target cell, and at this time, not only the uplink carrier of the terminal device needs to be handed over, but also the downlink carrier of the terminal device needs to be handed over.
At this time, the carrier switching condition of the terminal device is that the terminal device switches between different cells.
And S102, if so, the source base station sends an RRC connection reconfiguration message to the terminal equipment, so that the terminal equipment sends data on a target uplink carrier in at least one first uplink carrier indicated by the RRC connection reconfiguration message, wherein the RRC connection reconfiguration message includes information of the at least one first uplink carrier, and the first uplink carrier is an uplink carrier except an uplink carrier pre-paired with a downlink carrier.
In this embodiment, for each cell, one downlink carrier corresponds to N uplink carriers, and in the 36.101 protocol, one uplink carrier (and an uplink primary carrier) paired with the downlink carrier is defined in advance, and for convenience of description, the uplink primary carrier is referred to as an uplink carrier i, and each uplink carrier except the uplink carrier i in the N uplink carriers is referred to as a first uplink carrier. Thus, one downlink carrier corresponds to one uplink primary carrier (i.e., uplink carrier i) and N-1 uplink secondary carriers (i.e., first uplink carrier).
According to the above steps, if the source base station determines that the carrier switching condition of the terminal device is satisfied, an RRC connection reconfiguration message is sent to the terminal device, where the RRC connection reconfiguration message includes information of at least one first uplink carrier. And after receiving the RRC connection reconfiguration message, the terminal equipment analyzes the RRC connection reconfiguration message and obtains the carried information of at least one first uplink carrier. At this time, the terminal device selects one uplink carrier as a target uplink carrier from the information of at least one first uplink carrier, then, the terminal device switches from the current uplink carrier i to the target uplink carrier, and sends data on the target uplink carrier, thereby realizing the switching of the uplink carriers.
In a possible implementation manner of this embodiment, the mobile control information of the RRC connection reconfiguration message includes information of the at least one first uplink carrier.
That is, the source base station in this embodiment carries the information of the at least one first uplink carrier in the mobility control information in the RRC connection reconfiguration message, and sends the information of the at least one first uplink carrier to the terminal device through the mobility control information in the RRC connection reconfiguration message.
Optionally, the information of the first uplink carrier in this embodiment may include bandwidth, frequency band, and configuration information of the first uplink carrier.
The configuration information may include configuration related to random access of the first Uplink carrier, Sounding Reference Signal (SRS) related configuration, Physical Uplink Control Channel (PUCCH) related configuration, Physical Uplink Shared Channel (PUSCH) related configuration information, and the like.
In the method for configuring uplink carriers in carrier aggregation provided in the embodiment of the present invention, a source base station determines whether a carrier switching condition of a terminal device is satisfied, and if so, the source base station sends a radio resource control, RRC, connection reconfiguration message to the terminal device, so that the terminal device sends data on a target uplink carrier in at least one first uplink carrier indicated by the RRC connection reconfiguration message, where the RRC connection reconfiguration message includes information of the at least one first uplink carrier, and the first uplink carrier is an uplink carrier other than an uplink carrier pre-paired with a downlink carrier, thereby implementing switching of uplink carriers.
In a possible implementation manner of this embodiment, if the carrier switching condition of the terminal device of this embodiment includes: in the same cell, if the source base station performs load balancing among multiple uplink carriers, or if the uplink service requirement of the terminal device meets a preset threshold, the foregoing S102 may be replaced with the following S200:
s200, the source base station sends the RRC connection reconfiguration message to the terminal equipment, wherein the RRC connection reconfiguration message comprises the identifier of the source cell, the cell radio network temporary identifier of the source cell and the information of at least one first uplink carrier of the source cell.
The present embodiment is directed to a scenario in which the cell is unchanged and the carrier paired with the downlink carrier is changed.
Specifically, because each carrier aggregation cluster has only one downlink primary carrier, when switching between uplink carriers, it is necessary to reserve the connection of the downlink carriers and only switch the uplink carriers. If the source base station determines that carrier switching needs to be performed on the terminal equipment, the source base station sends an RRC connection reconfiguration message for indicating uplink carrier switching to the terminal equipment, so that the terminal equipment sends uplink data on a target uplink carrier indicated by the RRC connection reconfiguration message.
At this time, the downlink carrier of the source Cell is not changed, and the uplink carrier is switched, so the RRC connection reconfiguration message includes an identifier of the source Cell, a Cell Radio Network temporary identifier (Cell Radio Network temporary identifier, abbreviated as C-RNTI) of the source Cell, and information of at least one first uplink carrier of the source Cell.
In one example, the PCell (i.e., the source cell in this embodiment) DL CC is not changed, and the UL CC corresponding to the PCell DL CC is changed, for example, UL CC1 is changed to UL CCx. In this case, the RRC connection reconfiguration message (RRC connection reconfiguration) includes:
the mobile Control information (Mobility Control Info) in the RRC connection reconfiguration message includes the following information:
a) the target Phys Cell ID in the Mobility Control Info holds the Cell ID of the existing DL CC, i.e. the identifier of the source Cell;
b) the new terminal equipment Identity (newUE-Identity) keeps the C-RNTI of the current primary cell (PCell);
c) an uplink bandwidth (UL-Band width) in a Carrier bandwidth EUTRA (Evolved Universal Terrestrial Radio Access Network, abbreviated as Evolved Universal Terrestrial Radio Access Network)) becomes a bandwidth of UL CCx;
d) an uplink Carrier (UL-Carrier Freq) frequency band of a Carrier frequency EUTRA (Carrier Freq EUTRA) is changed into a frequency band of UL CCx;
e) common Radio Resource configuration (Radio Resource Config Common) becomes configuration information of UL CCx;
f) the Dedicated configuration (rach-Config deleted) is changed to configuration information of UL CCx.
That is, the Mobility Control information element of the present embodiment includes:
in this way, the terminal device, upon receiving the mobility control information in the above-described RRC connection reconfiguration message, determines that the target Phys Cell ID is the same as the existing Cell (i.e., the source Cell), and DL-Carrier Freq in Carrier Freq is the same as the existing Cell DL CC, but UL-Carrier Freq in Carrier Freq is different from the existing Cell UL CC. In this way, the terminal device changes the downlink carrier from UL CC1 to UL CCx without changing the downlink carrier, and then completes the uplink carrier switching.
Fig. 5 is a flowchart of a first configuration method for an uplink carrier in carrier aggregation according to a second embodiment of the present invention, where on the basis of the foregoing embodiment, a cell is not changed, and when a terminal device supports one downlink carrier and one uplink carrier, as shown in fig. 5, the S200 may specifically include:
s301, if the terminal device supports one downlink carrier and one uplink carrier, the source base station determines one first uplink carrier as the target uplink carrier from N first uplink carriers, where N is a positive integer.
S302, the source base station sends the RRC connection reconfiguration message to the terminal equipment, and the RRC connection reconfiguration message comprises the information of the target uplink carrier.
In practical application, the number of uplink carriers determined by the source base station for the terminal device is different according to different terminal devices, for example, when the terminal device only supports one downlink carrier and one uplink carrier, the source base station may determine one uplink carrier for the terminal device.
Specifically, the source base station selects one first uplink carrier from the N first uplink carriers as a target uplink carrier, and directly carries information of the target uplink carrier in the RRC connection reconfiguration message to send the RRC connection reconfiguration message to the terminal device. And the terminal equipment analyzes the target uplink carrier carried in the RRC connection reconfiguration message and sends data on the target uplink carrier.
For example, as shown in fig. 6, one first uplink carrier LTE UL CCx is selected as the target uplink carrier from the N first uplink carriers, so that the uplink carrier of the LTE DL CC1 is changed from the LTE UL CC1 to the LTE UL CCx.
In this embodiment, when the terminal device supports one downlink carrier and one uplink carrier, the source base station selects one first uplink carrier from the N first uplink carriers of the source cell as an i target uplink carrier, and carries information of the target uplink carrier in the RRC connection reconfiguration message to send to the terminal device, thereby reducing data amount carried in the RRC connection reconfiguration message, and enabling the terminal device to switch to the target uplink carrier indicated by the RRC connection reconfiguration message, thereby implementing accurate switching of the uplink carrier of the terminal device.
Fig. 7 is a flowchart of a second configuration method for an uplink carrier in carrier aggregation according to a second embodiment of the present invention, where on the basis of the foregoing embodiment, when a terminal device supports one downlink carrier and multiple uplink carriers, as shown in fig. 7, the S200 may specifically include:
s401, if the terminal device supports one downlink carrier and M uplink carriers, the source base station determines M first uplink carriers from N first uplink carriers, wherein N and M are positive integers, and N is greater than or equal to M.
S402, the source base station sends the RRC connection reconfiguration message to the terminal equipment, wherein the RRC connection reconfiguration message comprises the information of the M uplink carriers.
In practical application, when the terminal device supports one downlink carrier and M uplink carriers, the source base station needs to send information of the M first uplink carriers to the terminal device.
Specifically, the source base station selects M first uplink carriers from the N first uplink carriers, and sends the information of the M first uplink carriers to the terminal device by carrying the information in the RRC connection reconfiguration message. And the terminal equipment analyzes the RRC connection reconfiguration message to obtain the information of the M first uplink carriers.
Then, the terminal device determines one first uplink carrier from the M first uplink carriers as a target uplink carrier, and transmits data on the target uplink carrier.
For example, as shown in fig. 8, the N first uplink carriers select two first uplink carriers LTE UL CCy1 and a first uplink carrier LTE UL CCy 2. Thus, the LTE DL CC1 corresponds to LTE UL CCy1 and LTE UL CCy 2.
At this time, the mobile Control information (Mobility Control Info) in the RRC connection reconfiguration message includes the following information:
a) the target Phys Cell ID in the Mobility Control Info holds the Cell ID of the existing DL CC, i.e. the identifier of the source Cell;
b) the new terminal equipment Identity (newUE-Identity) maintains the C-RNTI of the current primary cell (PCell)
c) An uplink bandwidth (UL-Band width) in the carrier bandwidth eutra (carrier Band width eutra) is a bandwidth of UL CCy1 and UL CCy 2;
d) an UL-Carrier Freq frequency band of an uplink Carrier (UL-Carrier Freq) of a Carrier frequency EUTRA (Carrier Freq EUTRA (Evolved Universal Terrestrial Radio Access Network, abbreviated as Evolved Universal Terrestrial Radio Access Network)) is a frequency band of UL CCy1 and UL CCy 2;
e) common Radio Resource configuration (Radio Resource Config Common) is configuration information of UL CCy1 and UL CCy 2;
f) the Dedicated configuration (rach-Config determined) is configuration information of UL CCy1 and UL CCy 2.
After receiving the RRC connection reconfiguration message, the terminal device selects one uplink carrier from the M first uplink carriers as an uplink primary carrier of the terminal device, and the remaining M-1 first uplink carriers serve as uplink secondary carriers of the terminal device.
In this embodiment, when the terminal device supports one downlink carrier and multiple uplink carriers, the source base station selects M first uplink carriers from N first uplink carriers of the source cell, and sends the information of the M first uplink carriers to the terminal device by carrying the information in the RRC connection reconfiguration message, so that the terminal device selects one of the M first uplink carriers as a target uplink carrier, and sends data on the target uplink carrier.
Fig. 9 is a flowchart of a method for configuring an uplink carrier in carrier aggregation according to a third embodiment of the present invention. The carrier switching conditions according to this embodiment include: and the terminal equipment is switched among different cells, namely the terminal equipment is switched from the source cell to the target cell. At this time, as shown in fig. 9, in step S102, the sending, by the source base station, the RRC connection reconfiguration message to the terminal device may include:
s501, the source base station receives the RRC connection reconfiguration message sent by the target cell, wherein the RRC connection reconfiguration message comprises an identifier of the target cell, a cell radio network temporary identifier of the target cell and configuration information of at least one first uplink carrier of the target cell.
S502, the source base station sends the RRC connection reconfiguration message to the terminal equipment.
Specifically, when the terminal device is switched from the source cell to the target cell, the target cell sends the identifier of the target cell, the cell radio network temporary identifier of the target cell, and at least one first uplink carrier of the target cell to the source base station through an RRC connection reconfiguration message.
Optionally, the target base station notifies the source base station through Mobility Control Info in the RRC Connection Reconfiguration message.
Assuming that at least one first uplink carrier of the target cell is UL CCz, the Mobility Control Info in the RRC Connection Reconfiguration message may include:
a) the target Phys Cell ID in the Mobility Control Info is the target Cell ID;
b) the newUE-Identity is the C-RNTI of the target cell.
c) UL-Bandwidth in Carrier Bandwidth EUTRA is the Bandwidth of UL CCz of the target cell;
d) the UL-Carrier Freq frequency band of Carrier Freq EUTRA is the frequency band of UL CCz of the target cell;
e) radio Resource Config Common is the configuration information of the target cell UL CCz;
and the rach-Config Dedicated is configuration information of the target cell UL CCz.
Thus, the terminal device can switch from the UL CC1 of the source cell to the UL CCz of the target cell and send uplink data on the UL CCz.
When the terminal device is switched from the source cell to the target cell, the downlink carrier of the terminal device is switched from the downlink carrier of the source cell to the downlink carrier of the target cell.
In the 36.101 protocol, an uplink carrier paired with the downlink carrier of the target cell is predefined, and at this time, the target source base station may notify the terminal device of the uplink carrier paired with the downlink carrier of the target cell through the source base station. The terminal device may determine whether to switch to the uplink carrier or to switch to another uplink carrier in the target cell according to the load condition of the uplink carrier.
In an example, when the terminal device of this embodiment supports one downlink carrier and one uplink carrier, the target base station may select one first uplink carrier from the first uplink carriers of the target cell as the target uplink carrier, and send information of the target uplink carrier and information of the target cell to the source base station through an RRC connection reconfiguration message, so that the source base station forwards the information to the terminal device.
In another example, when the terminal device of this embodiment supports one downlink carrier and M uplink carriers, the target base station may select M first uplink carriers from the first uplink carriers of the target cell, and send information of the M first uplink carriers and information of the target cell to the source base station through an RRC connection reconfiguration message, so that the source base station forwards the information to the terminal device. Reference may be made to the description of the above embodiments, which are not repeated herein.
In the method for configuring uplink carriers in carrier aggregation provided in the embodiment of the present invention, when a terminal device switches between different cells, a source base station receives an RRC connection reconfiguration message sent by a target cell, where the RRC connection reconfiguration message includes an identifier of the target cell, a cell radio network temporary identifier of the target cell, and configuration information of at least one first uplink carrier of the target cell. And then, the source base station sends the RRC connection reconfiguration message to the terminal equipment, so that the switching of the uplink carrier is completed when the terminal equipment is switched among different cells.
Fig. 10 is a flowchart of a method for configuring an uplink carrier in carrier aggregation according to a fourth embodiment of the present invention. On the basis of the above embodiment, as shown in fig. 10, the method of the present embodiment may include:
s601, a source base station sends RRC connection reconfiguration information to terminal equipment, wherein the RRC connection reconfiguration information comprises measurement configuration;
s602, the terminal equipment sends a measurement report to the source base station;
s603, the source base station generates a switching decision according to the measurement report;
s604, the source base station sends a switching request to the target base station, wherein the switching request carries information that the terminal equipment supports one downlink carrier and M uplink carriers.
S605, the target base station generates admission control.
S606, the target base station sends a switching request response to the source base station, wherein the switching request response carries a downlink carrier of the target cell and at least one first uplink carrier of the target cell;
s607, the source base station sends RRC connection reconfiguration message to the terminal equipment, and the mobile control information of the RRC connection reconfiguration message carries the downlink carrier of the target cell and at least one first uplink carrier of the target cell;
data forwarding
S608, completing random access reconfiguration;
s609, the terminal equipment sends an RRC connection reconfiguration completion message to the target base station;
s610, the target base station, the MME and the S-GW carry out downlink path switching;
s611, the target base station sends the resource release information of the terminal equipment to the source base station;
and S612, the source base station releases resources.
The switching process of the uplink carrier in this embodiment is similar to a general switching process in LTE, and the difference is that a switching request sent by a source base station to a target base station carries information that a terminal device supports one downlink carrier and M uplink carriers. In this way, the target base station may carry the downlink carrier of the target cell and the at least one first uplink carrier of the target cell in a handover request response sent to the source base station according to the handover request.
At this time, the terminal device may switch from the downlink carrier of the source cell to the downlink carrier of the target cell, and simultaneously switch from the uplink carrier of the source cell to one first uplink carrier of the target cell, so that the terminal device may transmit uplink data through the first uplink carrier of the target cell instead of transmitting uplink data using the uplink carrier paired with the downlink carrier in the target cell, thereby avoiding the problem of excessive load on the uplink main carrier of the target cell, and improving the transmission efficiency of the uplink data.
In this embodiment, the terminal device may determine the handover process according to information carried by the mobile control information in the RRC connection reconfiguration message sent by the source base station, specifically, as shown in table 1:
TABLE 1
In the method for configuring uplink carriers in carrier aggregation provided by the embodiment of the present invention, a handover request sent by a source base station to a target base station carries information that a terminal device supports one downlink carrier and M uplink carriers. In this way, the target base station may carry the downlink carrier of the target cell and the at least one first uplink carrier of the target cell in the handover request response sent to the source base station according to the handover request, so that the terminal device switches the uplink carrier of the original cell to the first uplink carrier of the target cell, thereby completing the handover of the uplink carriers between the cells.
Fig. 11 is a schematic structural diagram of a configuration apparatus for an uplink carrier in carrier aggregation according to an embodiment of the present invention. As shown in fig. 11, the apparatus 100 for configuring an uplink carrier in carrier aggregation according to this embodiment may include:
a judging module 110, configured to judge whether a carrier switching condition of a terminal device is satisfied;
a sending module 120, configured to send a radio resource control, RRC, connection reconfiguration message to the terminal device when the determining module determines that a carrier switching condition of the terminal device is met, so that the terminal device sends data on a target uplink carrier in at least one first uplink carrier indicated by the RRC connection reconfiguration message, where the RRC connection reconfiguration message includes information of the at least one first uplink carrier, and the first uplink carrier is an uplink carrier other than an uplink carrier pre-paired with a downlink carrier.
The apparatus for configuring uplink carriers in carrier aggregation according to the embodiments of the present invention may be configured to implement the technical solutions of the above-described method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
In a possible implementation manner of this embodiment, the carrier switching condition of the terminal device includes: in the same cell, the source base station performs load balancing among a plurality of uplink carriers, or the uplink service requirement of the terminal equipment meets a preset threshold;
the sending module 120 is specifically configured to send the RRC connection reconfiguration message to the terminal device, where the RRC connection reconfiguration message includes the identifier of the source cell, the cell radio network temporary identifier of the source cell, and information of at least one first uplink carrier of the source cell.
Fig. 12 is a schematic structural diagram of a configuration apparatus of an uplink carrier in carrier aggregation according to a second embodiment of the present invention, and on the basis of the foregoing embodiment, as shown in fig. 12, the sending module 120 includes a first determining unit 121 and a first sending unit 122;
the first determining unit 121 is configured to determine, if the terminal device supports one downlink carrier and one uplink carrier, one first uplink carrier as the target uplink carrier from N first uplink carriers, where N is a positive integer;
the first sending unit 122 is configured to send the RRC connection reconfiguration message to the terminal device, where the RRC connection reconfiguration message includes the information of the target uplink carrier.
The apparatus for configuring uplink carriers in carrier aggregation according to the embodiments of the present invention may be configured to implement the technical solutions of the above-described method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
Fig. 13 is a schematic structural diagram of a configuration apparatus of an uplink carrier in carrier aggregation according to a second embodiment of the present invention, and on the basis of the foregoing embodiment, as shown in fig. 13, the sending module 120 includes a second determining unit 123 and a second sending unit 124;
the second determining unit 123 is configured to determine M first uplink carriers from N first uplink carriers if the terminal device supports one downlink carrier and M uplink carriers, where N and M are positive integers, and N is greater than or equal to M;
the second sending unit 124 is configured to send the RRC connection reconfiguration message to the terminal device, where the RRC connection reconfiguration message includes the information of the M first uplink carriers.
The apparatus for configuring uplink carriers in carrier aggregation according to the embodiments of the present invention may be configured to implement the technical solutions of the above-described method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
In a possible implementation manner of this embodiment, the carrier switching condition includes: the terminal equipment is switched among different cells;
the sending module 120 is specifically configured to send, by the source base station, the RRC connection reconfiguration message to the terminal device, where the RRC connection reconfiguration message includes an identifier of a target cell, a cell radio network temporary identifier of the target cell, and configuration information of at least one first uplink carrier of the target cell.
Fig. 14 is a schematic structural diagram of a configuration apparatus of an uplink carrier in carrier aggregation according to a third embodiment of the present invention, and based on the foregoing embodiments, as shown in fig. 14, the configuration apparatus 100 of an uplink carrier in carrier aggregation according to this embodiment may further include:
a receiving module 130, configured to receive the RRC connection reconfiguration message sent by the target cell.
In a possible implementation manner of this embodiment, the mobile control information of the RRC connection reconfiguration message includes information of the at least one first uplink carrier.
In another possible implementation manner of this embodiment, the configuration information of the first uplink carrier includes a bandwidth, a frequency band, and configuration information of the first uplink carrier.
The apparatus for configuring uplink carriers in carrier aggregation according to the embodiments of the present invention may be configured to implement the technical solutions of the above-described method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
Fig. 15 is a schematic structural diagram of a base station according to an embodiment of the present invention, and as shown in fig. 15, a base station 30 according to this embodiment includes:
a memory 31 for storing a computer program;
the processor 32 is configured to execute the computer program to implement the method for configuring the uplink carrier in carrier aggregation, which has similar implementation principles and technical effects and is not described herein again.
Further, when at least a part of functions of the method for configuring an uplink carrier in carrier aggregation in the embodiment of the present invention are implemented by software, an embodiment of the present invention further provides a computer storage medium, where the computer storage medium is used to store computer software instructions for configuring an uplink carrier in carrier aggregation, and when the computer storage medium is run on a computer, the computer can execute various possible methods for configuring an uplink carrier in carrier aggregation in the embodiment of the method. The processes or functions described in accordance with the embodiments of the present invention may be generated in whole or in part when the computer-executable instructions are loaded and executed on a computer. The computer instructions may be stored on a computer storage medium or transmitted from one computer storage medium to another via wireless (e.g., cellular, infrared, short-range wireless, microwave, etc.) to another website site, computer, server, or data center. The computer storage media may be any available media that can be accessed by a computer or a data storage device, such as a server, data center, etc., that incorporates one or more available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., SSD), among others.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (11)

1. A method for configuring an uplink carrier in carrier aggregation is characterized by comprising the following steps:
the source base station judges whether the carrier switching condition of the terminal equipment is met;
if so, the source base station sends a Radio Resource Control (RRC) connection reconfiguration message to the terminal equipment, so that the terminal equipment sends data on a target uplink carrier in at least one first uplink carrier indicated by the RRC connection reconfiguration message, wherein the RRC connection reconfiguration message includes information of the at least one first uplink carrier, and the first uplink carrier is an uplink carrier except an uplink carrier pre-paired with a downlink carrier.
2. The method of claim 1, wherein the carrier switching condition of the terminal device comprises: in the same cell, the source base station performs load balancing among a plurality of uplink carriers, or the uplink service requirement of the terminal equipment meets a preset threshold;
the source base station sends the RRC connection reconfiguration message to the terminal equipment, and the RRC connection reconfiguration message comprises the following steps:
and the source base station sends the RRC connection reconfiguration message to the terminal equipment, wherein the RRC connection reconfiguration message comprises the identifier of the source cell, the cell radio network temporary identifier of the source cell and the information of at least one first uplink carrier of the source cell.
3. The method of claim 2, wherein the sending, by the source base station, the RRC connection reconfiguration message to the terminal device comprises:
if the terminal equipment supports a downlink carrier and an uplink carrier, the source base station determines a first uplink carrier as the target uplink carrier from N first uplink carriers, wherein N is a positive integer;
and the source base station sends the RRC connection reconfiguration message to the terminal equipment, wherein the RRC connection reconfiguration message comprises the information of the target uplink carrier.
4. The method of claim 2, wherein the sending, by the source base station, the RRC connection reconfiguration message to the terminal device comprises:
if the terminal equipment supports one downlink carrier and M uplink carriers, the source base station determines M first uplink carriers from N first uplink carriers, wherein N and M are positive integers, and N is greater than or equal to M;
and the source base station sends the RRC connection reconfiguration message to the terminal equipment, wherein the RRC connection reconfiguration message comprises the information of the M first uplink carriers.
5. The method of claim 1, wherein the carrier switch condition comprises: the terminal equipment is switched among different cells;
the source base station sends the RRC connection reconfiguration message to the terminal equipment, and the RRC connection reconfiguration message comprises the following steps:
and the source base station sends the RRC connection reconfiguration message to the terminal equipment, wherein the RRC connection reconfiguration message comprises an identifier of a target cell, a cell radio network temporary identifier of the target cell and configuration information of at least one first uplink carrier of the target cell.
6. The method of claim 5, wherein before the source base station sends the RRC connection reconfiguration message to the terminal device, the method further comprises:
and the source base station receives the RRC connection reconfiguration message sent by the target cell.
7. The method according to any of claims 1-5, wherein the mobility control information of the RRC connection reconfiguration message comprises information of the at least one first uplink carrier.
8. The method according to any of claims 1-5, wherein the configuration information of the first uplink carrier comprises bandwidth, frequency band and configuration information of the first uplink carrier.
9. An apparatus for configuring an uplink carrier in carrier aggregation, comprising:
the judging module is used for judging whether the carrier switching condition of the terminal equipment is met or not;
a sending module, configured to send a radio resource control, RRC, connection reconfiguration message to the terminal device when the determining module determines that a carrier switching condition of the terminal device is met, so that the terminal device sends data on a target uplink carrier in at least one first uplink carrier indicated by the RRC connection reconfiguration message, where the RRC connection reconfiguration message includes information of the at least one first uplink carrier, and the first uplink carrier is an uplink carrier other than an uplink carrier pre-paired with a downlink carrier.
10. A base station, comprising:
a memory for storing a computer program;
a processor configured to execute the computer program to implement the method for configuring uplink carrier in carrier aggregation according to any one of claims 1 to 8.
11. A computer storage medium, wherein a computer program is stored in the storage medium, and when executed, the computer program implements the method for configuring uplink carriers in carrier aggregation according to any one of claims 1 to 8.
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