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WO2017070948A1 - Procédé et appareil d'agrégation de porteuses - Google Patents

Procédé et appareil d'agrégation de porteuses Download PDF

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Publication number
WO2017070948A1
WO2017070948A1 PCT/CN2015/093427 CN2015093427W WO2017070948A1 WO 2017070948 A1 WO2017070948 A1 WO 2017070948A1 CN 2015093427 W CN2015093427 W CN 2015093427W WO 2017070948 A1 WO2017070948 A1 WO 2017070948A1
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WIPO (PCT)
Prior art keywords
terminal
bandwidth
capability
carrier
resource
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2015/093427
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English (en)
Chinese (zh)
Inventor
陈根杰
刘少飞
刘巍
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Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN201580042189.3A priority Critical patent/CN107113790A/zh
Priority to PCT/CN2015/093427 priority patent/WO2017070948A1/fr
Publication of WO2017070948A1 publication Critical patent/WO2017070948A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to the field of wireless network technologies, and in particular, to a carrier aggregation method and apparatus.
  • CA Carrier Aggregation
  • the terminal may support aggregation of multiple CCs, including one primary component carrier (PCC) and at least one secondary component carrier (SCC) among the aggregated multiple CCs.
  • PCC primary component carrier
  • SCC secondary component carrier
  • the cell corresponding to the PCC is the primary cell (PCell), and the cell corresponding to the SCC is called the secondary cell (SCell).
  • the terminal reports its CA capability to the RAN (Radio Access Network) device, for example, the CA band supported by the terminal and the bandwidth combination capability.
  • the RAN device combines the CA capability of the terminal with the terminal. Configure the CA to increase the Internet access rate of the terminal.
  • the types of access terminals are diverse, and the CA bandwidth combination capabilities of different terminals are often different. It is often the case that the operator's bandwidth resource combination cannot balance the bandwidth combining capabilities, and the performance is not optimal. .
  • the bandwidth resource combination of many operators is relatively simple, and the types of CA bandwidth combining capabilities of the terminal are diverse. Therefore, it is difficult to balance the terminals of various CA bandwidth combining capabilities, so that the performance of various terminals is optimized.
  • the present invention provides a carrier aggregation method and device, which can achieve the performance gain brought by carrier aggregation and improve the downlink throughput performance of the UE in the scenario that the bandwidth capability combination of the UE does not meet the actual bandwidth combination of the network side. .
  • a first aspect of the present invention provides a carrier aggregation method, including:
  • the radio access network RAN device determines the first band according to the bandwidth of the primary carrier and the bandwidth of the secondary carrier. Wide combination
  • the RAN device acquires a carrier aggregation CA capability of the first terminal
  • the RAN device configures a second bandwidth combination for the first terminal, and the second bandwidth combination matches a CA capability of the first terminal.
  • the method further includes:
  • the RAN device acquires a CA capability of the second terminal
  • the RAN device configures the first bandwidth combination for the second terminal.
  • the method further includes:
  • the method further includes:
  • the method further includes:
  • the primary carrier control channel resource is allocated to the secondary carrier of the first terminal, and is used to carry the PDCCH information of the secondary carrier.
  • the EPDCCH resource of the secondary carrier is allocated to the first terminal, and is used to carry PDCCH information of the secondary carrier.
  • a second aspect of the present invention provides a carrier aggregation apparatus, including:
  • a combination determining module configured to determine a first bandwidth combination according to a bandwidth of the primary carrier and a bandwidth of the secondary carrier
  • a bandwidth acquisition module configured to acquire a carrier aggregation CA capability of the first terminal
  • a bandwidth determining module configured to determine, according to the CA capability of the first terminal, that the CA capability of the first terminal does not match the first bandwidth combination
  • a bandwidth configuration module configured to configure a second bandwidth combination for the first terminal, where the second bandwidth combination matches a CA capability of the first terminal.
  • the bandwidth acquisition module is further configured to acquire a CA capability of the second terminal.
  • the bandwidth determining module is further configured to determine, according to the CA capability of the second terminal, that the CA capability of the second terminal matches the first bandwidth combination;
  • the bandwidth configuration module is further configured to configure the first bandwidth combination for the second terminal.
  • the device further includes a resource allocation module, configured to use, according to the first bandwidth Combining, assigning a physical downlink shared channel PDSCH resource to the second terminal.
  • the resource allocation module is further configured to be used according to the foregoing The second bandwidth combination allocates PDSCH resources to the first terminal.
  • the resource allocation module is further configured to A terminal allocates a physical downlink control channel PDCCH resource.
  • the primary carrier control channel resource is allocated to the secondary carrier of the first terminal, and is used to carry the auxiliary PDCCH information of the carrier.
  • the resource allocation module is specifically configured to:
  • the EPDCCH resource of the secondary carrier is allocated to the first terminal, and is used to carry PDCCH information of the secondary carrier.
  • a third aspect of the present invention provides another carrier aggregation apparatus, characterized in that the apparatus comprises a network interface, a memory and a processor, wherein the memory stores a set of program codes, and the processor is configured to call a program stored in the memory. Code to do the following:
  • the processor further performs the following steps:
  • the processor further performs the following steps:
  • the processor further performs the following steps:
  • the processor further performs the following steps:
  • the processor further performs the following steps:
  • the primary carrier control channel resource is allocated to the secondary carrier of the first terminal, and is used to carry the PDCCH information of the secondary carrier.
  • the processor further performs the following steps:
  • the EPDCCH resource of the secondary carrier is allocated to the first terminal, and is used to carry PDCCH information of the secondary carrier.
  • the radio access network RAN device first determines the first bandwidth combination according to the bandwidth of the primary carrier and the bandwidth of the secondary carrier; and then acquires the carrier aggregation CA capability of the first terminal; the RAN device is configured according to the first terminal The CA capability, secondly determining that the CA capability of the first terminal does not match the first bandwidth combination; finally configuring a second bandwidth combination for the first terminal, the second bandwidth combination and the CA of the first terminal Ability to match. Therefore, in a scenario where the bandwidth combination of the user terminal does not meet the actual bandwidth combination of the network side, the user terminal can use the virtual bandwidth for carrier aggregation to improve the downlink throughput performance of the UE.
  • FIG. 1 is a schematic diagram of a carrier aggregation method according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a carrier aggregation method according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of another carrier aggregation method according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a PDSCH resource allocation manner according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a cross-carrier scheduling manner according to an embodiment of the present disclosure
  • FIG. 6 is a schematic structural diagram of an EPDCCH channel resource indication according to an embodiment of the present disclosure.
  • FIG. 7 is a signaling flow diagram of still another carrier aggregation method according to an embodiment of the present invention.
  • FIG. 8 is a schematic flowchart diagram of still another carrier aggregation method according to an embodiment of the present invention.
  • FIG. 9 is a schematic flowchart of a carrier aggregation method according to another embodiment of the present invention.
  • FIG. 10 is a schematic flowchart of a carrier aggregation method according to another embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a carrier aggregation apparatus according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of another carrier aggregation apparatus according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of still another carrier aggregation apparatus according to an embodiment of the present invention.
  • the RAN device is a device that accesses a terminal to a wireless network, including but not limited to: an evolved Node B (eNB), a radio network controller (RNC), and a Node B ( Node B, NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (for example, Home evolved NodeB, or Home Node B, HNB), Baseband Unit (BaseBand Unit) , BBU), Wifi access point (Access Point, AP), etc.
  • eNB evolved Node B
  • RNC radio network controller
  • Node B Node B
  • BSC Base Station Controller
  • BTS Base Transceiver Station
  • HNB Base Station
  • Baseband Unit Baseband Unit
  • BBU Baseband Unit
  • Wifi access point Access Point, AP
  • a terminal also known as a User Equipment (UE)
  • UE User Equipment
  • a terminal is a device that provides voice and/or data connectivity to a user, for example, a handheld device with wireless connectivity, an in-vehicle device, and a connection to Other processing devices for wireless modems, etc.
  • UE User Equipment
  • Multiple means two or more. "and/or”, describing the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately.
  • the character "/" generally indicates that the contextual object is an "or" relationship.
  • the carrier's bandwidth resource combination is BandM's 20M bandwidth + Band20's 15M bandwidth.
  • the protocol defines the CA bandwidth combination capabilities of the two terminals, namely set0 and set1, respectively. , set0 supports up to 20M bandwidth of Band3 + 10M bandwidth of Band20, set1 supports up to 20M bandwidth of Band3 + 15M bandwidth of Band20.
  • the RAN device configures 20M according to Band3, and Band20 configures 15M for CA configuration.
  • the terminal of set1 can be a CA, and the terminal of set0 can only perform single-carrier service.
  • the RAN device configures 20M according to Band3, Band20 Configure 10M to perform CA configuration.
  • the terminals of set0 and set1 can only do 20M+10M CA, so that the performance of terminals with multiple CA bandwidth combining capabilities can not be achieved in the same frequency band resource combination. excellent.
  • the present application is directed to the problem that the performance of the terminal capable of combining various CA bandwidth combining capabilities in one band bandwidth resource combination can be optimized in the prior art solution, and a carrier aggregation method is proposed.
  • the RAN device actually adopts a first type of bandwidth combination (which may also be referred to as an actual bandwidth combination), and the RAN device configures an actual bandwidth combination for the terminal whose CA bandwidth combining capability matches the actual bandwidth combination;
  • a terminal that does not match the CA bandwidth combining capability and the actual bandwidth combination the RAN device configures a second bandwidth combination, and the second bandwidth combination is combined with the CA bandwidth capability of the terminal whose CA bandwidth combining capability does not match the actual bandwidth combination.
  • Matching unlike the actual bandwidth combination employed by the RAN device, can therefore be referred to as a virtual bandwidth combination.
  • the terminal that can match the CA bandwidth combining capability with the actual bandwidth combination can implement the CA by using the actual bandwidth combination, and the terminal that does not match the CA bandwidth capability combination and the actual bandwidth combination can adopt the second bandwidth that matches the combination of its own CA bandwidth capability.
  • the CA is implemented in combination, so that the terminals that implement different CA bandwidth combining capabilities can configure the CA, so that the bandwidth resources can be more fully utilized, the downlink throughput of the terminal can be improved, and the performance can be improved.
  • FIG. 1 is a schematic diagram of a carrier aggregation method according to an embodiment of the present invention.
  • the actual bandwidth combination adopted by the RAN device is 15M of BandM's 20M+Band 20.
  • the CA bandwidth combining capability matches the actual bandwidth combination, so the actual bandwidth combination is configured for the terminal; for the terminal of set0, although the CA bandwidth combining capability does not match the actual bandwidth combination, the RAN device It is configured with a virtual bandwidth combination that matches the set0 terminal, that is, 10M of Band3's 20M+Band 20.
  • both types of terminals can implement CA configuration.
  • FIG. 2 is a schematic flowchart diagram of a carrier aggregation method according to an embodiment of the present invention.
  • the executor of the embodiment of the present invention may be a RAN device, and the method in the embodiment of the present invention includes:
  • the RAN device determines, according to a bandwidth of the primary carrier and a bandwidth of the secondary carrier, a first bandwidth combination.
  • S203 Determine a CA capability of the first terminal and the first band according to the CA capability of the first terminal.
  • the wide combination does not match, and according to the CA capability of the second terminal, determining that the CA capability of the second terminal matches the first bandwidth combination;
  • first bandwidth combination and the second bandwidth combination both include a primary carrier bandwidth and a secondary carrier bandwidth, where the primary bandwidth of the first bandwidth combination and the second bandwidth combination are the same, and the secondary carrier bandwidth is different.
  • the primary carrier bandwidth is 20M for Band 3
  • the secondary carrier bandwidth is 15M and 10M for Band 20 respectively.
  • the RAN device configures the virtual bandwidth (for example, 10M of the Band 20) to ensure that it can also configure the CA, so that the bandwidth resources are sufficient. use.
  • the RAN device can further allocate resources for the terminal. That is, please refer to FIG. 3, which is a schematic flowchart of another carrier aggregation method according to an embodiment of the present invention. In addition to the steps shown in Figure 2, the following steps are included:
  • the RAN device allocates a channel resource to the first terminal according to the second bandwidth combination.
  • the RAN device allocates a channel resource to the second terminal according to the first bandwidth combination.
  • the above channel resource is a PDSCH (Physical Downlink Shared Channel) resource.
  • the downlink air interface resource that is, the PDSCH resource allocation
  • the downlink air interface resource is performed according to the type of the terminal that is actually scheduled according to multiple bandwidths.
  • FIG. 4 is a schematic diagram of a PDSCH resource allocation manner according to an embodiment of the present invention. As shown in FIG. 4, for the 15M cell of the Band20, after the CA of the set0 terminal is configured, the resources of the PDSCH are allocated to the terminals of the corresponding bandwidth according to the bandwidths of 15M and 10M, respectively.
  • the second terminal that matches the CA capability may allocate the PDSCH resource in the entire frequency band according to the 15M mode, and the first terminal that does not match the CA capability may allocate the PDSCH resource in the central 10M frequency band according to the 10M mode.
  • the central 10M frequency band is only an example, and any part of the 10M frequency band may be used for PDSCH resource allocation.
  • the above channel resource may also be a PDCCH (Physical Downlink Control Channel) resource. Since the PDCCH physical resource is a full-bandwidth discrete mapping, logical CCEs (Control Channel Elements) of different bandwidths are highly likely to be mapped. The location of the partially overlapping physical REG (Resource Element Group) causes the terminal to demodulate. In one mode, PDCCH resource allocation can be avoided by using multiple bandwidths in the same cell. In this case, the PDCCH channel is reserved for the real bandwidth of the cell configured with the virtual bandwidth. The terminal and the cell are used for common signaling.
  • the SCC terminal configured with the virtual bandwidth can be processed in the following two ways:
  • the first cross-carrier scheduling scheme carries the PDCCH of the secondary carrier by using the control channel resource of the primary carrier (for example, the PDCCH resource, and of course, the EPDCCH resource), for example, configuring the SCC in the set0 (virtual 10M bandwidth) is cross-carrier scheduling, and the PDCCH channel of the SCC is indicated by the PCC of Band3.
  • the PDCCH information of the secondary carrier of the first terminal is transmitted through the control channel resource of the primary carrier, and the PDCCH information of the secondary carrier of the second terminal is transmitted by the control channel resource of the secondary carrier. That is, the control channel resources of the secondary carrier are allocated to the second terminal, and the control channel resources of the secondary carrier of the first terminal are allocated on the control channel of the primary carrier.
  • the EPDCCH scheme uses the EPDCCH to carry the PDCCH of the secondary carrier.
  • the SCC Virtual 10M Bandwidth
  • the PDCCH information of the secondary carrier of the first terminal is transmitted by the EPDCCH resource of the secondary carrier
  • the PDCCH information of the secondary carrier of the second terminal is transmitted by the PDCCH resource of the secondary carrier. That is, the PDCCH resources of the secondary carrier are all allocated to the second terminal, and the EPDCCH resources of the secondary carrier are all allocated to the first terminal.
  • the EPDCCH specifies a part of resource blocks (RBs) on the PDSCH channel to be used as a control channel.
  • the RAN device is the RAN device where the primary cell or the primary carrier is located, and the RAN device can obtain the capability of the terminal CA through the capability reporting of the terminal, and the bandwidth of the primary carrier is known by itself.
  • the bandwidth of the carrier can be obtained by query.
  • each cell maintains a list of neighboring areas. When the terminal reports on A4, it will carry the measured cell frequency and PCI (Physical Cell Identifier), and then PCC takes this information in the neighboring area.
  • PCI Physical Cell Identifier
  • PCC Physical Cell Identifier
  • the actual bandwidth of the cell ie, the secondary cell
  • the details are described below in conjunction with the drawings.
  • FIG. 7 is a signaling flow diagram of still another carrier aggregation method according to an embodiment of the present invention. As shown in FIG. 7, the method includes the following steps:
  • the primary cell sends a bandwidth capability query message to the terminal.
  • S703 The terminal receives the bandwidth capability query message sent by the primary cell, and returns an actual bandwidth combination capability of the terminal to the primary cell according to the bandwidth capability query message.
  • the primary cell sends a bandwidth query message to the secondary cell.
  • the secondary cell receives the bandwidth resource query message sent by the primary cell, and returns a query result to the primary cell, where the query result includes the networking bandwidth of the secondary cell.
  • the primary cell receives the query result, and determines whether the actual bearer bandwidth of the terminal in the secondary cell matches the network bandwidth of the secondary cell. If it is determined that the actual bearer bandwidth of the terminal in the secondary cell does not match the network bandwidth of the secondary cell, An RRC connection reconfiguration message carrying virtual bandwidth information is sent to the terminal.
  • the terminal receives the RRC connection reconfiguration message carrying the virtual bandwidth information, and configures the virtual bandwidth of the secondary carrier in the carrier aggregation in the secondary cell according to the virtual bandwidth information, and returns the configuration result.
  • the actual bandwidth combining capability of the terminal is Band3 20M+Band20 10M
  • the networking bandwidth of the secondary cell Bnad20 is 15M
  • the bandwidth capability of the terminal in the secondary cell Band20 is limited, so configuring the terminal to be virtual in the secondary cell
  • the bandwidth is 10M, so that the RAN device can allocate channel resources to the user terminal according to the virtual bandwidth of 10M in the secondary cell Band20, and allocate channel resources to the user terminal according to the real bandwidth of 20M in the primary cell Band3.
  • FIG. 8 is a schematic flowchart diagram of a carrier aggregation method according to an embodiment of the present invention.
  • the executor of the embodiment of the present invention may be a RAN device, and the method in the embodiment of the present invention includes:
  • the RRC (Radio Resource Control) connection reconfiguration message carrying the virtual bandwidth information is sent to the terminal with limited bandwidth capability in the first cell, so that the terminal is configured according to the virtual bandwidth information.
  • the RRC connection reconfiguration message is used to indicate that the terminal selects a carrier in the first cell as a secondary carrier that is aggregated by the carrier, and a carrier in a second cell is a primary carrier that is aggregated by the carrier.
  • the actual bearer bandwidth of the target terminal in the first cell that is sent by the target terminal may be first received; if the actual bearer bandwidth of the target terminal in the first cell is related to the first cell If the network bandwidth is not matched, the target terminal is determined as the terminal with limited bandwidth capability in the first cell; and then the terminal carrying the bandwidth information is transmitted to the terminal with limited bandwidth capability in the first cell.
  • RRC connection reconfiguration message After receiving the RRC connection reconfiguration message, the terminal first selects the carrier in the first cell as the secondary carrier that is aggregated by the carrier, and the carrier in the second cell is the primary carrier that is aggregated by the carrier, and then according to the virtual bandwidth.
  • the information configures a virtual bandwidth of the secondary carrier in the carrier aggregation in the first cell, so that the terminal can use the virtual bandwidth for carrier aggregation in the first cell.
  • the channel resource includes a PDSCH (Physical Downlink Shared Channel) channel resource.
  • the RAN device may allocate the PDSCH channel resource to the terminal according to the virtual bandwidth of the secondary carrier in the carrier aggregation in the first cell configured by the terminal, and according to the terminal in the second cell. Determining the real bandwidth of the primary carrier in carrier aggregation, and allocating PDSCH channel resources to the terminal.
  • the PDSCH channel resource is used to carry user data.
  • the bandwidth resource combination of the carrier is 20M bandwidth of Band3 + 15M bandwidth of Band20. If the terminal supports Band3 20M+Band20 10M, the bandwidth capability of the terminal in the first cell Band20 is limited.
  • the RAN device may allocate a PDSCH channel resource to the terminal according to the virtual bandwidth of 10M in the first cell Band20, and allocate a PDSCH channel resource to the terminal in the second cell Band3 according to the real bandwidth of 20M; If the terminal supports Band3 20M+Band20 15M, the bandwidth capability of the first cell Band20 and the second cell Band3 of the terminal terminal is not limited.
  • the RAN device can allocate PDSCH channel resources according to the real bandwidth of 15M in the first cell Band20.
  • the PDSCH channel resource may be allocated in the second cell Band3 according to the real bandwidth of 20M.
  • an RRC connection reconfiguration message carrying virtual bandwidth information is first sent to a terminal with limited bandwidth capability in the first cell, so that the terminal is configured in the first according to the virtual bandwidth information.
  • the virtual bandwidth of the secondary carrier in the carrier aggregation in the cell and then according to the The virtual bandwidth of the secondary carrier in the carrier aggregation in the first cell configured by the terminal, and the channel resource is allocated to the terminal, so that the actual bandwidth combination scenario in which the bandwidth capability combination of the terminal does not meet the network side is implemented.
  • the terminal can use the virtual bandwidth for carrier aggregation to improve the downlink throughput performance of the UE.
  • FIG. 9 is a schematic flowchart diagram of a carrier aggregation method according to another embodiment of the present invention.
  • the executor of the embodiment of the present invention may be a RAN device, and the method in the embodiment of the present invention includes:
  • the RRC connection reconfiguration message carrying the virtual bandwidth information is sent to the terminal with limited bandwidth capability in the first cell, so that the terminal is configured in the carrier aggregation in the first cell according to the virtual bandwidth information.
  • the virtual bandwidth of the secondary carrier is used to indicate that the terminal selects a carrier in the first cell as a secondary carrier that is aggregated by the carrier, and a carrier in a second cell is a primary carrier that is aggregated by the carrier.
  • the bandwidth of the terminal in the first cell is the virtual bandwidth of the secondary carrier in the carrier aggregation
  • the primary carrier in the carrier aggregation in the second cell by the terminal The PDCCH (Physical Downlink Control Channel) channel resource corresponding to the secondary carrier in the carrier aggregation is allocated and allocated to the terminal.
  • the PDCCH Physical Downlink Control Channel
  • the PDCCH channel resource allocation according to the multiple bandwidths is not supported in the same cell, and therefore the PDCCH channel resources are all allocated to the terminal configured with the real bandwidth in the first cell, for the first cell.
  • a terminal configured with the virtual bandwidth of the secondary carrier in the carrier aggregation where the RAN device carries the secondary carrier in the carrier aggregation by using the primary carrier in the carrier aggregation in the second cell by the terminal
  • the channel resources carried by the primary carrier in the carrier aggregation include the PDCCH channel resource corresponding to the first cell and the PDCCH channel resource corresponding to the second cell.
  • the control information on the PDCCH channel resource is used to schedule and control user data on the PDSCH channel resource, where the control information includes a transmission format, a resource allocation, an uplink scheduling grant, a power control, and an uplink retransmission information.
  • the PDCCH channel resource corresponding to the secondary carrier in carrier aggregation is placed.
  • two PDCCH channel resources are carried on the primary carrier, and the control information on the first PDCCH channel resource is used to control and schedule user data on the PDSCH channel resource on the primary carrier in the carrier aggregation.
  • the control information on the two PDCCH channel resources is used to control and schedule user data on the PDSCH channel resources on the secondary carrier in the carrier aggregation, thereby implementing cross-carrier scheduling of PDCCH channel resources.
  • an RRC connection reconfiguration message carrying virtual bandwidth information is first sent to a terminal with limited bandwidth capability in the first cell, so that the terminal is configured in the first according to the virtual bandwidth information.
  • a virtual bandwidth of the secondary carrier in the carrier aggregation in the cell and then the PDCCH channel resource corresponding to the secondary carrier in the carrier aggregation is carried by the primary carrier in the carrier aggregation in the second cell by the terminal, thereby Implementing and scheduling user data on PDSCH channel resources on the secondary carrier in the carrier aggregation.
  • FIG. 10 is a schematic flowchart diagram of a carrier aggregation method according to another embodiment of the present invention.
  • the executor of the embodiment of the present invention may be a RAN device, and the method in the embodiment of the present invention includes:
  • S1001 Send an RRC connection reconfiguration message carrying the virtual bandwidth information to the terminal with limited bandwidth capability in the first cell, so that the terminal is configured in the carrier aggregation in the first cell according to the virtual bandwidth information.
  • the RRC connection reconfiguration message is used to indicate that the terminal selects a carrier in the first cell as a secondary carrier that is aggregated by the carrier, and a carrier in a second cell is a primary carrier that is aggregated by the carrier.
  • the carrier aggregation in the first cell configured according to the terminal
  • the virtual bandwidth of the secondary carrier is allocated to the terminal by a PDSCH channel resource.
  • the partial resource block in the PDSCH channel resource allocated to the terminal is used as the EPDCCH (Enhanced Physical Downlink Control Channel) channel resource of the terminal.
  • EPDCCH Enhanced Physical Downlink Control Channel
  • the left part of FIG. 6 is a PDCCH channel resource
  • the right part is a A PDSCH channel resource, where a part of resource blocks in a PDSCH channel resource is used as an EPDCCH channel resource.
  • the PDCCH channel resource allocation according to the multiple bandwidths is not supported in the same cell.
  • the RAN device will use the PDSCH.
  • the channel resource part resource block is used as the EPDCCH channel resource of the terminal, so as to control and schedule the user data on the PDSCH channel resource on the secondary carrier in the carrier aggregation by using the EPDCCH channel resource bearer control information.
  • an RRC connection reconfiguration message carrying virtual bandwidth information is first sent to a terminal with limited bandwidth capability in the first cell, so that the terminal is configured in the first according to the virtual bandwidth information.
  • the virtual bandwidth of the secondary carrier in the carrier aggregation in the cell, and then the partial resource block in the PDSCH channel resource allocated to the terminal is used as the EPDCCH channel resource of the terminal, thereby implementing control and scheduling of the carrier User data on the PDSCH channel resource on the secondary carrier in the aggregation.
  • FIG. 11 is a schematic structural diagram of a carrier aggregation apparatus according to an embodiment of the present invention. As shown in the figure, the device in the embodiment of the present invention includes:
  • the information sending module 1101 is configured to send, to the terminal with limited bandwidth capability in the first cell, an RRC connection reconfiguration message carrying the virtual bandwidth information, so that the terminal is configured in the first cell according to the virtual bandwidth information.
  • the virtual bandwidth of the secondary carrier in the carrier aggregation is configured to send, to the terminal with limited bandwidth capability in the first cell, an RRC connection reconfiguration message carrying the virtual bandwidth information, so that the terminal is configured in the first cell according to the virtual bandwidth information.
  • the terminal with limited bandwidth capability in the first cell may be first determined, and then the RRC connection reconfiguration message carrying the virtual bandwidth information is sent to the terminal with limited bandwidth capability in the first cell.
  • the terminal After receiving the RRC connection reconfiguration message, the terminal first selects the carrier in the first cell as the secondary carrier that is aggregated by the carrier, and the carrier in the second cell is the primary carrier that is aggregated by the carrier, and then according to the virtual bandwidth.
  • the information configures a virtual bandwidth of the secondary carrier in the carrier aggregation in the first cell, so that the terminal can use the virtual bandwidth for carrier aggregation in the first cell.
  • the resource allocation module 1102 is configured to allocate a channel resource to the terminal according to a virtual bandwidth of the secondary carrier in the carrier aggregation in the first cell configured by the terminal.
  • the channel resource includes a PDSCH (Physical Downlink Shared Channel) channel resource.
  • the RAN device may perform the virtual bandwidth of the secondary carrier in the carrier aggregation in the first cell according to the terminal configuration, to the end
  • the terminal allocates a PDSCH channel resource, and allocates a PDSCH channel resource to the terminal according to the real bandwidth of the primary carrier in the carrier aggregation of the terminal in the second cell.
  • the PDSCH channel resource is used to carry user data.
  • the bandwidth resource combination of the carrier is 20M bandwidth of Band3 + 15M bandwidth of Band20. If the terminal supports Band3 20M+Band20 10M, the bandwidth capability of the terminal in the first cell Band20 is limited.
  • the RAN device may allocate a PDSCH channel resource to the terminal according to the virtual bandwidth of 10M in the first cell Band20, and allocate a PDSCH channel resource to the terminal in the second cell Band3 according to the real bandwidth of 20M; If the terminal supports Band3 20M+Band20 15M, the bandwidth capability of the first cell Band20 and the second cell Band3 of the terminal terminal is not limited.
  • the RAN device can allocate PDSCH channel resources according to the real bandwidth of 15M in the first cell Band20.
  • the PDSCH channel resource may be allocated in the second cell Band3 according to the real bandwidth of 20M.
  • the primary carrier carries a PDCCH (Physical Downlink Control Channel) channel resource corresponding to the secondary carrier in the carrier aggregation, and is allocated to the terminal.
  • PDCCH Physical Downlink Control Channel
  • the PDCCH channel resource allocation according to the multiple bandwidths is not supported in the same cell. Therefore, all the PDCCH channel resources are allocated to the terminal configured with the real bandwidth in the first cell, for the first cell.
  • the PDCCH channel resource includes the PDCCH channel resource corresponding to the first cell and the PDCCH channel resource corresponding to the second cell.
  • the control information on the PDCCH channel resource is used to schedule and control user data on the PDSCH channel resource, where the control information includes a transmission format, a resource allocation, an uplink scheduling grant, a power control, and an uplink retransmission information.
  • the PDCCH channel resource corresponding to the secondary carrier in the carrier aggregation is placed on the primary carrier, and two PDCCH channel resources are carried on the primary carrier, and the control information on the first PDCCH channel resource is used for control. And scheduling user data on a PDSCH channel resource on the primary carrier in the carrier aggregation, and control information on the second PDCCH channel resource is used to control User data on a PDSCH channel resource on a secondary carrier in the carrier aggregation is scheduled, thereby implementing cross-carrier scheduling of PDCCH channel resources.
  • the terminal when determining that the bandwidth of the terminal in the first cell is the virtual bandwidth of the secondary carrier in the carrier aggregation, the terminal may be configured in the first cell according to the terminal.
  • the virtual bandwidth of the secondary carrier in the carrier aggregation allocates a PDSCH channel resource to the terminal, and then uses a part of the resource blocks allocated to the terminal of the PDSCH channel resource as the EPDCCH channel resource of the terminal .
  • the left part of FIG. 6 is a PDCCH channel resource
  • the right part is a PDSCH channel resource, where some resource blocks in a PDSCH channel resource are used as an EPDCCH channel resource.
  • the PDCCH channel resource allocation according to the multiple bandwidths is not supported in the same cell.
  • the RAN device will use the PDSCH.
  • the channel resource part resource block is used as the EPDCCH channel resource of the terminal, so as to control and schedule the user data on the PDSCH channel resource on the secondary carrier in the carrier aggregation by using the EPDCCH channel resource bearer control information.
  • the apparatus in the embodiment of the present invention may further include:
  • the information receiving module 1103 is configured to receive an actual bearer bandwidth of the target terminal that is sent by the target terminal in the first cell.
  • the terminal determining module 1104 is configured to determine, if the actual terminal bandwidth of the target terminal in the first cell does not match the network bandwidth of the first cell, determine the target terminal as the A terminal with limited bandwidth capability in a cell.
  • an RRC connection reconfiguration message carrying virtual bandwidth information is first sent to a terminal with limited bandwidth capability in the first cell, so that the terminal is configured in the first according to the virtual bandwidth information.
  • a virtual bandwidth of the secondary carrier in the carrier aggregation in the cell and then allocating channel resources to the terminal according to the virtual bandwidth of the secondary carrier in the carrier aggregation in the first cell configured by the terminal, thereby implementing
  • the terminal can use the virtual bandwidth for carrier aggregation to improve the downlink throughput performance of the UE in the scenario where the combination of the bandwidth of the terminal does not meet the actual bandwidth of the network.
  • the information receiving module 1103 in this embodiment may be a receiver of the RAN device, and the information sending module 1101 may be a transmitter of the RAN device;
  • the receiving module 1103 and the information transmitting module 1101 are integrated to form a transceiver of the RAN device.
  • the resource allocation module 1102 or the terminal determining module 1104 may be a separately set processing element, or may be implemented in one of the processing elements of the RAN device, or may be stored in the memory of the RAN device in the form of program code, by the RAN.
  • a certain processing element of the device invokes and performs the functions of the above resource allocation module 1102 or terminal determining module 1104.
  • the processing element described herein may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated systems configured to implement embodiments of the present invention. Circuit.
  • FIG. 12 is a schematic structural diagram of another carrier aggregation apparatus according to an embodiment of the present invention.
  • the device in the embodiment of the present invention includes:
  • the combination determining module 1201 is configured to determine a first bandwidth combination according to a bandwidth of the primary carrier and a bandwidth of the secondary carrier;
  • the bandwidth acquisition module 1202 is configured to acquire CA capability of the first terminal and the second terminal that access the RAN device.
  • the bandwidth determining module 1203 is configured to determine, according to the CA capability of the first terminal, that the CA capability of the first terminal does not match the first bandwidth combination, and determine the CA capability of the second terminal according to the CA capability of the second terminal. a bandwidth combination match;
  • the bandwidth configuration module 1204 is configured to configure a second bandwidth combination for the first terminal, and configure the first bandwidth combination for the second terminal, where the second bandwidth combination matches the CA capability of the first terminal.
  • first bandwidth combination and the second bandwidth combination both include a primary carrier bandwidth and a secondary carrier bandwidth, where the primary bandwidth of the first bandwidth combination and the second bandwidth combination are the same, and the secondary carrier bandwidth is different.
  • the primary carrier bandwidth is 20M for Band 3
  • the secondary carrier bandwidth is 15M and 10M for Band 20 respectively.
  • the RAN device configures the virtual bandwidth (for example, 10M of the Band 20) to ensure that it can also configure the CA, so that the bandwidth resources are sufficient. use. After the virtual bandwidth is configured, the RAN device can further allocate resources for the terminal.
  • the virtual bandwidth for example, 10M of the Band 20
  • the apparatus may further include:
  • the resource allocation module 1205 is configured to allocate a channel resource to the first terminal according to the second bandwidth combination, and allocate a channel resource to the second terminal according to the first bandwidth combination.
  • the above channel resource is a PDSCH (Physical Downlink Shared Channel) resource.
  • the downlink air interface resource that is, the PDSCH resource allocation
  • the downlink air interface resource is performed according to the type of the terminal that is actually scheduled according to multiple bandwidths.
  • FIG. 4 is a schematic diagram of a PDSCH resource allocation manner according to an embodiment of the present invention. As shown in FIG. 4, for the 15M cell of the Band20, after the CA of the set0 terminal is configured, the resources of the PDSCH are allocated to the terminals of the corresponding bandwidth according to the bandwidths of 15M and 10M, respectively.
  • the second terminal that matches the CA capability may allocate the PDSCH resource in the entire frequency band according to the 15M mode, and the first terminal that does not match the CA capability may allocate the PDSCH resource in the central 10M frequency band according to the 10M mode.
  • the central 10M frequency band is only an example, and any part of the 10M frequency band may be used for PDSCH resource allocation.
  • the above channel resource may also be a PDCCH (Physical Downlink Control Channel) resource. Since the PDCCH physical resource is a full-bandwidth discrete mapping, a logical CCE (Control Channel Element) of different bandwidths is likely to be mapped to a partially overlapping physical element group (Resource Element Group), thereby causing the terminal. Demodulation failed.
  • PDCCH resource allocation can be avoided by using multiple bandwidths in the same cell. In this case, the PDCCH channel is reserved for the real bandwidth of the cell configured with the virtual bandwidth.
  • the terminal and the cell are used for common signaling.
  • the SCC terminal configured with the virtual bandwidth can be processed in the following two ways:
  • the first cross-carrier scheduling scheme carries the PDCCH of the secondary carrier by using the control channel resource of the primary carrier (for example, the PDCCH resource, and of course, the EPDCCH resource), for example, configuring the SCC in the set0 (virtual 10M bandwidth) is cross-carrier scheduling, and the PDCCH channel of the SCC is indicated by the PCC of Band3.
  • the PDCCH information of the secondary carrier of the first terminal is transmitted through the control channel resource of the primary carrier, and the PDCCH information of the secondary carrier of the second terminal is transmitted by the control channel resource of the secondary carrier. That is, the control channel resources of the secondary carrier are allocated to the second terminal, and the control channel resources of the secondary carrier of the first terminal are allocated on the control channel of the primary carrier.
  • the EPDCCH scheme uses the EPDCCH to carry the PDCCH of the secondary carrier.
  • the SCC Virtual 10M Bandwidth
  • the PDCCH information of the secondary carrier of the first terminal is transmitted by the EPDCCH resource of the secondary carrier
  • the PDCCH information of the secondary carrier of the second terminal is transmitted by the PDCCH resource of the secondary carrier. That is, the PDCCH resources of the secondary carrier are all allocated to the second terminal, and the EPDCCH resources of the secondary carrier are all allocated to the first terminal.
  • the EPDCCH specifies a part of resource blocks (RBs) on the PDSCH channel to be used as a control channel.
  • the RAN device is the RAN device where the primary cell or the primary carrier is located, and the RAN device can obtain the capability of the terminal CA through the capability reporting of the terminal, and the bandwidth of the primary carrier is known by itself.
  • the bandwidth of the carrier can be obtained by query.
  • each cell maintains a list of neighboring areas. When the terminal reports on A4, it will carry the measured cell frequency and PCI (Physical Cell Identifier), and then PCC takes this information in the neighboring area.
  • PCI Physical Cell Identifier
  • PCC Physical Cell Identifier
  • the actual bandwidth of the cell ie, the secondary cell
  • the details are described below in conjunction with the drawings.
  • FIG. 13 is a schematic structural diagram of an embodiment of a carrier aggregation apparatus according to the present invention.
  • the carrier aggregation apparatus includes a processor 1301 and an interface circuit 1302.
  • the memory 1303 and the bus 1304 are also shown.
  • the processor 1301, the interface circuit 1302, and the memory 1203 are connected by a bus 1304 and complete each other. Communication.
  • processor 1301 is configured to:
  • the processor 1301 is further configured to:
  • the target terminal determines the target terminal as the bandwidth capability in the first cell Limited terminal.
  • the channel resource includes a PDSCH channel resource, and the processor 1301 further performs the following steps:
  • the channel resource includes a PDCCH channel resource, and the processor 1301 further performs the following steps:
  • the primary carrier bearer in the carrier aggregation in the second cell by the terminal The PDCCH channel resource corresponding to the secondary carrier in the carrier aggregation is allocated to the terminal.
  • the channel resource includes a PDSCH channel resource and an EPDCCH channel resource, and the processor 1301 further performs the following steps:
  • the bandwidth of the terminal in the first cell is the virtual bandwidth of the secondary carrier in the carrier aggregation, in the carrier aggregation in the first cell configured according to the terminal
  • the virtual bandwidth of the secondary carrier allocates a PDSCH channel resource to the terminal;
  • a partial resource block in the PDSCH channel resource allocated to the terminal is used as the EPDCCH channel resource of the terminal.
  • the processor 1301 herein may be a processing component or a collective name of multiple processing components.
  • the processing component may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention.
  • CPU Central Processing Unit
  • ASIC Application Specific Integrated Circuit
  • DSPs digital singal processors
  • FPGAs Field Programmable Gate Arrays
  • the memory 1303 may be a storage device or a collective name of a plurality of storage elements, and is used to store parameters, data, and the like required for execution of the executable program code or the carrier aggregation device. And the memory 1303 may include random access memory (RAM), and may also include non-volatile memory such as a magnetic disk memory, a flash memory, or the like.
  • RAM random access memory
  • the bus 1304 can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an extended industry standard body. Extended Industry Standard Architecture (EISA) bus, etc.
  • ISA Industry Standard Architecture
  • PCI Peripheral Component
  • EISA Extended Industry Standard Architecture
  • the total 1304 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in FIG. 13, but it does not mean that there is only one bus or one type of bus.
  • the carrier aggregation apparatus may further include input and output means connected to the bus 1304 to be connected to other parts such as the processor 1301 via a bus.
  • the input/output device can provide an input interface for the operator, so that the operator can select the control item through the input interface, and can also select a preset plurality of RAN devices.
  • an output interface can be provided to display tracking information or results to the operator.
  • the program may be stored in a computer readable storage medium, and the storage medium may include: Flash disk, Read-Only Memory (ROM), Random Access Memory (RAM), disk or optical disk.

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

Abstract

La présente invention concerne un procédé et un appareil d'agrégation de porteuses. Le procédé comprend les étapes suivantes : un dispositif de réseau d'accès radio (RAN pour Radio Access Network) détermine une première combinaison de bandes passantes en fonction de la bande passante d'une porteuse primaire et de la bande passante d'une porteuse secondaire ; le dispositif de réseau RAN acquiert la capacité d'agrégation de porteuses (CA pour Carrier Aggregation) d'un premier terminal ; le dispositif de réseau RAN détermine que la capacité d'agrégation de porteuses du premier terminal ne correspond pas à la première combinaison de bandes passantes en fonction de la capacité d'agrégation de porteuses du premier terminal ; et le dispositif de réseau RAN configure une seconde combinaison de bandes passantes pour le premier terminal, la seconde combinaison de bandes passantes correspondant à la capacité d'agrégation de porteuses du premier terminal. Grâce à la présente invention, dans le cas d'une combinaison de capacités de bande passante d'un terminal d'utilisateur ne satisfaisant pas une combinaison de bandes passantes actuelle d'un côté réseau, le terminal d'utilisateur peut utiliser une bande passante virtuelle pour exécuter une agrégation de porteuses de sorte à améliorer les performances de débit de liaison descendante d'un équipement utilisateur (UE pour User Equipment).
PCT/CN2015/093427 2015-10-30 2015-10-30 Procédé et appareil d'agrégation de porteuses Ceased WO2017070948A1 (fr)

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CN113518456A (zh) * 2021-04-20 2021-10-19 Tcl通讯（宁波）有限公司 一种频段带宽协商方法、装置、网络服务器及存储介质

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