CN111294806B

CN111294806B - Method for sharing FDD frequency spectrum with LTE system and other systems and base station equipment

Info

Publication number: CN111294806B
Application number: CN201811495277.0A
Authority: CN
Inventors: 魏立梅; 袁乃华; 范晨; 朱玉梅; 陈贵荣; 佟学俭
Original assignee: Chengdu TD Tech Ltd
Current assignee: Chengdu TD Tech Ltd
Priority date: 2018-12-07
Filing date: 2018-12-07
Publication date: 2022-11-04
Anticipated expiration: 2038-12-07
Also published as: CN111294806A

Abstract

The application discloses a method for sharing an FDD spectrum with an LTE system and other systems and base station equipment, wherein an FDD spectrum A occupied by an old mobile communication system is divided into two sections of spectrums with bandwidths respectively being A1 and A2, one or more old cells are established on the spectrum with the bandwidth being A1, one or more FDD LTE cells are established on the spectrum with the bandwidth being A2, LAA cells are established on uplink and downlink spectrums occupied by the old mobile communication system, and one or more FDD LTE cells and one or more LAA cells are configured to be auxiliary cells of UE supporting uplink and/or downlink LAA characteristics, so that resources on corresponding spectrums can be used when the old mobile communication system is idle, the utilization rate and efficiency of the corresponding spectrums are improved, and the evolution of the old mobile communication system to the LTE system is better supported.

Description

Method for sharing FDD frequency spectrum with LTE system and other systems and base station equipment

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a method and a base station device for sharing an FDD spectrum between an LTE system and other systems.

Background

Currently, in the field of public networks, wireless communication systems have entered the rapid development period of 4G LTE systems after undergoing the development of analog communication systems, digital narrowband communication systems, and spread spectrum communication systems. In the private network domain, evolution is also being made from digital narrowband communication systems to LTE systems. Therefore, a problem arises in the public and private network fields as to how to evolve to the LTE system using the spectrum occupied by the old mobile communication system.

Such as: in the national public security field, PDT System (Police Digital Trunking System) is evolving to LTE System, and how PDT System deployed at present evolves to LTE System on FDD spectrum authorized for public security field needs to be solved, which specifically includes: how to realize the coexistence of the PDT system and the LTE system and how to make the LTE system effectively use the spectrum resources occupied by the PDT system when the PDT system is idle.

Disclosure of Invention

The application provides a method for sharing FDD frequency spectrum with other systems by an LTE system and base station equipment, so as to realize coexistence of a PDT system and the LTE system and enable the LTE system to effectively use frequency spectrum resources occupied by the PDT system when the PDT system is idle.

The application discloses a method for sharing an FDD frequency spectrum by an LTE system and other systems, which comprises the following steps:

the eNodeB divides the FDD spectrum a occupied by the first mobile communication system into two sections: a section of bandwidth is A1, and one or more first mobile communication system cells are established at the frequency spectrum position corresponding to the section of bandwidth; the other section of bandwidth is A2, and one or more FDD LTE cells are established at the frequency spectrum position corresponding to the section of bandwidth; wherein A1+ A2= A0, A0 being the bandwidth of spectrum a;

the eNodeB respectively establishes one or more authorized auxiliary access LAA cells on an uplink frequency spectrum and a downlink frequency spectrum corresponding to a frequency band with the bandwidth of A1;

when the UE accesses one FDD LTE cell, the eNodeB receives and stores the UE capacity information reported by the UE;

when the UE capability information indicates: when the UE supports uplink and/or downlink LAA characteristics, the eNodeB configures one or more FDD LTE cells and one or more LAA cells as auxiliary cells to the UE according to the service application of the UE, the UE capability information, the load condition of each FDD LTE cell and the load condition of each LAA cell.

Preferably, the method further comprises:

for the UE supporting the uplink LAA characteristic, when an eNodeB schedules uplink resources for transmitting the uplink service of the UE, the eNodeB allocates PUSCH resources to the UE in each FDD LTE cell and each cell for transmitting the uplink service in each LAA cell configured to the UE; the UE monitors a control channel and sends a corresponding PUSCH in a corresponding cell according to the monitored scheduling information on the control channel;

for UE supporting the downlink LAA characteristic, when scheduling downlink resources for transmitting downlink services of the UE, an eNodeB allocates PDSCH resources to the UE in each FDD LTE cell configured to the UE and each cell used for transmitting the downlink services in each LAA cell; and the UE monitors the control channel and receives the corresponding PDSCH in the corresponding cell according to the monitored scheduling information on the control channel.

Preferably, the established bandwidth and carrier frequency point of the FDD LTE cell are determined according to the following method:

the eNodeB determines the number of the established FDD LTE cells, the frequency spectrum position of each FDD LTE cell and the occupied frequency spectrum bandwidth on the frequency band with the bandwidth of A2 according to the configuration of the OMC or the LMT; wherein, the bandwidth value of the LTE district includes: 1.4M, 3M, 5M, 10M, 15M or 20M;

when the frequency spectrum bandwidth B occupied by an FDD LTE cell is a value in the bandwidth values of the LTE cell, determining that the bandwidth of the FDD LTE cell is B;

otherwise, when the value of B is not the value in the bandwidth values of the LTE cell, selecting the minimum bandwidth value larger than B from the bandwidth values of the LTE cell as the bandwidth of the FDD LTE cell, wherein the carrier frequency point of the FDD LTE cell is the central frequency point of the frequency spectrum occupied by the cell.

Preferably, the established bandwidth and carrier frequency point of the LAA cell are determined according to the following method:

the eNodeB respectively determines the number of the established LAA cells, the spectrum position of each LAA cell and the occupied spectrum bandwidth on the uplink spectrum and the downlink spectrum corresponding to the frequency band with the bandwidth of A1 according to the configuration of the OMC or the LMT;

when the frequency spectrum bandwidth C occupied by an LAA cell is a value in the bandwidth values of the LTE cell, determining that the bandwidth of the LAA cell is C; wherein, the bandwidth value of the LTE district includes: 1.4M, 3M, 5M, 10M, 15M or 20M;

otherwise, when the value of C is not the value in the bandwidth values of the LTE cell, selecting the minimum bandwidth value greater than C or the maximum bandwidth value less than C from the bandwidth values of the LTE cell as the bandwidth of the LAA cell, where the carrier frequency point of the LAA cell is the center frequency point of the spectrum occupied by the cell.

Preferably, the reporting of the UE capability information by the UE includes:

when the UE supports carrier aggregation CA, the UE capability information carries CA related capability information;

when the UE supports the uplink LAA feature, the UE capability information carries: IE and newly added IE related to uplink LAA characteristics defined in the 3gpp ts36.331 protocol: uplink LAA frequency band information; the uplink LAA frequency band information IE is used for reporting each uplink LAA frequency band supported by the UE;

when the UE supports the downlink LAA feature, the UE capability information carries: IE related to the downlink LAA characteristics and newly added IE defined in the 3GPP TS36.331 protocol: downlink LAA frequency band information; and the downlink LAA frequency band information IE is used for reporting each downlink LAA frequency band supported by the UE.

Preferably, the eNodeB configuring one or more FDD LTE cells as secondary cells to the UE includes:

the method comprises the steps that an eNodeB determines FDD LTE cells supported by UE in other FDD LTE cells except the FDD LTE cell accessed by the UE according to CA related capability information in UE capability information, and selects one or more FDD LTE cells as auxiliary cells to be configured to the UE in the FDD LTE cells supported by the UE according to service application of the UE and the load condition of the FDD LTE cells supported by the UE; for any FDD LTE cell configured to the UE, the eNodeB specifies that only the uplink service of the UE, only the downlink service of the UE or both the uplink service and the downlink service of the UE are borne in the cell;

the eNodeB configuring one or more of the LAA cells as secondary cells to the UE comprises:

the eNodeB determines LAA cells supported by the UE in each established LAA cell according to the IE related to the uplink LAA characteristic, the IE related to the downlink LAA characteristic, the IE related to the uplink LAA frequency band and the IE related to the downlink LAA frequency band information in the UE capability information, and selects one or more of the LAA cells supported by the UE as auxiliary cells to be configured to the UE according to the service application of the UE and the load condition of the LAA cells supported by the UE; for any LAA cell configured to the UE, the eNodeB specifies that only the uplink service of the UE, only the downlink service of the UE or both the uplink service and the downlink service of the UE are carried in the LAA cell.

Preferably, for an LAA cell established on an uplink spectrum corresponding to a frequency band with a bandwidth of A1, the eNodeB only carries uplink services of the UE through the cell;

for an LAA cell established on a downlink frequency spectrum corresponding to a frequency band with the bandwidth of A1, an eNodeB only bears downlink services of UE through the cell.

Preferably, the eNodeB allocating PUSCH and/or PDSCH resources to the UE includes:

for any LAA cell configured to the UE, when the cell is used for transmitting downlink service of the UE, the eNodeB allocates PUCCH resources to the LAA cell, and ACK/NACK information of a transmission block TB on a PDSCH of the LAA cell is fed back to the eNodeB through the PUCCH on the allocated PUCCH resources;

and for any LAA cell configured to the UE, the eNodeB informs the UE of the scheduling information of the PUSCH/PDSCH of the LAA cell through a control channel.

Preferably, the eNodeB allocates PUCCH resources to the LAA cell in the FDD LTE cell accessed by the UE, and the ACK/NACK information of the TB on the PDSCH of the LAA cell is fed back to the eNodeB through the PUCCH on the PUCCH resources allocated in the FDD LTE cell accessed by the UE;

alternatively, the eNodeB instructs the UE to: and the ACK/NACK information of the TB on the PDSCH of the LAA cell is fed back to the eNodeB through the nearest PUSCH in the FDD LTE cell accessed by the UE.

Preferably, for any LAA cell configured to the UE, the eNodeB notifies the UE of the scheduling information of the PUSCH/PDSCH of the LAA cell through the control channel of the LAA cell;

or, the eNodeB adopts cross-carrier scheduling, and notifies the scheduling information of the PUSCH/PDSCH of the LAA cell to the UE through a DCI format of a carrier indication field carried on a control channel of an FDD LTE cell to which the UE is accessed;

for any LAA cell configured to the UE, when the eNodeB determines to adopt cross-carrier scheduling, the eNodeB allocates a unique cross-carrier scheduling carrier subscript for the LAA cell configured to the UE, wherein the subscript is used for distinguishing different cells in a DCI format carrying a carrier indication domain.

Preferably, the process of monitoring the control channel by the UE includes:

for an LAA cell configured to UE, if the configuration information of the LAA cell does not carry an IE cross-carrier scheduling carrier subscript, the UE monitors a control channel of the LAA cell to capture the scheduling information of a PUSCH/PDSCH of the LAA cell;

if the configuration information of the LAA cell carries the IE cross-carrier scheduling carrier subscript, the UE monitors a control channel of an FDD LTE cell accessed by the UE to capture the scheduling information of the PUSCH/PDSCH of the LAA cell; when the UE monitors the PDCCH in the accessed FDD LTE cell, and the DCI format on the PDCCH carries a carrier indicating domain, and the value of the carrier indicating domain is equal to the value indicated by the IE cross-carrier scheduling carrier subscript, the UE considers the PDCCH to be used for scheduling the LAA cell, and sends a corresponding PUSCH in the LAA cell or receives a corresponding PDSCH in the LAA cell according to uplink or downlink scheduling information in the DCI format on the PDCCH.

Preferably, the method further comprises:

when the UE receives the PDSCH in an LAA cell, the UE feeds back ACK/NACK information of the received TB on the PDSCH to the eNodeB, and the specific feedback process includes:

when the UE determines according to the stored configuration information of the LAA cell: when ACK/NACK information of TB on a PDSCH of the LAA cell is fed back through PUCCH resources allocated to the LAA cell in an FDD LTE cell accessed by the UE, the UE sends a corresponding PUCCH to an eNodeB through the allocated PUCCH resources in the FDD LTE cell accessed by the UE, and the PUCCH carries the ACK/NACK information of the TB on the PDSCH of the LAA cell;

when the UE determines according to the stored configuration information of the LAA cell: when the ACK/NACK information of the TB on the PDSCH of the LAA cell is fed back through the nearest PUSCH in the FDD LTE cell accessed by the UE, the UE carries the ACK/NACK information of the TB on the PDSCH of the LAA cell in the FDD LTE cell accessed by the UE through the nearest PUSCH;

when the UE determines that the configuration information of each auxiliary cell is stored: and when ACK/NACK information of TBs on PDSCHs of a plurality of auxiliary cells is fed back through a nearest PUSCH in an FDD LTE cell accessed by the UE, the ACK/NACK information of the TBs on the PDSCHs of the plurality of cells is concatenated in sequence to form an ACK/NACK information bit stream which is carried to the eNodeB through the PUSCH when the ACK/NACK information of the TBs on the PDSCHs of the plurality of cells is fed back on the same PUSCH in the FDD LTE cell accessed by the UE.

Preferably, when the eNodeB configures the secondary cells for the UE, the eNodeB sends the configuration information of each secondary cell configured for the UE to the UE through a dedicated signaling;

when ACK/NACK information of TBs on PDSCHs of a plurality of cells happens to be fed back on the same PUSCH in an FDD LTE cell accessed by the UE, the UE concatenates the ACK/NACK information of the cells to form an ACK/NACK information bit stream according to the sequence of the configuration information of the cells in the special signaling, and the ACK/NACK information is carried to the eNodeB through the PUSCH.

The application also discloses a base station device, including: the system comprises a spectrum division module, a cell establishment module, a capability acquisition module and a configuration module, wherein:

the frequency spectrum division module is configured to divide an FDD frequency spectrum a occupied by the first mobile communication system into two sections: one section of bandwidth is A1, and the other section of bandwidth is A2, where A1+ A2= A0, and A0 is the bandwidth of spectrum a;

the cell establishing module is used for establishing one or more first mobile communication system cells at a spectrum position corresponding to a bandwidth A1, establishing one or more FDD LTE cells at a spectrum position corresponding to a bandwidth A2, and respectively establishing one or more authorized auxiliary access LAA cells at an uplink spectrum and a downlink spectrum corresponding to a frequency band of the bandwidth A1;

the capability acquisition module is used for receiving and storing the UE capability information reported by the UE when the UE accesses one FDD LTE cell;

the configuration module is configured to, when the UE capability information indicates: when the UE supports uplink and/or downlink LAA characteristics, one or more FDD LTE cells and one or more LAA cells are configured to the UE as auxiliary cells according to the service application of the UE, the UE capability information, the load condition of each FDD LTE cell and the load condition of each LAA cell.

Preferably, the base station device further includes a scheduling module, and the scheduling module is configured to:

for the UE supporting the uplink LAA characteristic, when uplink resources are scheduled to be used for transmitting the uplink service of the UE, a PUSCH is allocated to the UE in each FDD LTE cell and each cell used for transmitting the uplink service in each LAA cell configured to the UE;

for the UE supporting the downlink LAA characteristic, when scheduling downlink resources for transmitting downlink services of the UE, an eNodeB allocates PDSCH resources to the UE in each FDD LTE cell configured to the UE and each cell used for transmitting the downlink services in each LAA cell.

According to the technical scheme, the method for sharing the FDD spectrum with other systems and the base station equipment provided by the application establish the LAA cells on the uplink and downlink spectrums occupied by the old mobile communication system, and configure one or more FDD LTE cells and one or more LAA cells as the auxiliary cells of the UE supporting the uplink and/or downlink LAA characteristics, so that resources on the corresponding spectrums can be used when the old mobile communication system is idle, the utilization rate and efficiency of the corresponding spectrums are improved, and the evolution of the old mobile communication system to the LTE system is better supported.

Drawings

Fig. 1 is a flowchart illustrating a method for sharing FDD spectrum between an LTE system and other systems according to the present invention;

fig. 2 is a schematic structural diagram of a base station apparatus according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below by referring to the accompanying drawings and examples.

The invention provides a method for sharing an FDD frequency spectrum by an LTE system and other systems, which comprises the following steps:

first, for an FDD spectrum a occupied by a certain old mobile communication system (corresponding to the first mobile communication system in the claims), in order to realize the evolution of the old mobile communication system to the LTE system, a bandwidth A1 used by the old mobile communication system and a bandwidth A2 used by the LTE system are predetermined, A1+ A2= A0, and A0 is a bandwidth of the spectrum a.

Then, the location of the bandwidth A1 used by the old mobile communication system and the location of the bandwidth A2 used by the LTE system are determined in the spectrum a.

One or more old mobile communication system cells (old cells, which may also be referred to as first mobile communication system cells) are then established at the location of the bandwidth A1, and one or more FDD LTE cells are established at the location of the bandwidth A2.

And finally, establishing a plurality of authorized Assisted Access (LAA) cells at the position of the bandwidth A1 for using the spectrum resources occupied by the old cell when the old cell is idle: one or more LAA cells are established on an uplink frequency spectrum corresponding to the bandwidth A1, and one or more LAA cells are established on a downlink frequency spectrum corresponding to the bandwidth A1. When the old cell is idle, the LAA cell reusing the spectrum of the old cell may use the corresponding idle resource.

Preferably, the entire FDD spectrum a can be divided into two sections: one section of bandwidth is A1 for establishing an old cell, and one section of bandwidth is A2 for establishing an FDD LTE cell. Because the maximum bandwidth of the LTE cell is 20M, when the bandwidth A2 is not greater than 20M, one or more FDD LTE cells are established at a spectrum position corresponding to the bandwidth; otherwise, a plurality of FDD LTE cells are established at the frequency spectrum position corresponding to the bandwidth. When the bandwidth A1 is not more than 20M, respectively establishing one or more LAA cells on an uplink spectrum and a downlink spectrum corresponding to the bandwidth A1; otherwise, a plurality of LAA cells are respectively established on the uplink frequency spectrum and the downlink frequency spectrum corresponding to the bandwidth A1. For the UE supporting the LAA feature, after the UE accesses the FDD LTE cell, one or more FDD LTE cells and one or more LAA cells may be configured to the UE as secondary cells according to the service application of the UE, UE capability information reported by the UE, load conditions of each LTE FDD cell, and load conditions of each LAA cell. In an LAA cell, channel idle detection is performed before both uplink and downlink transmissions, and uplink and downlink transmissions are performed only when the channel is idle. Therefore, by establishing one or more LAA cells on the uplink and downlink frequency spectrums corresponding to the bandwidth A1, the LTE system can effectively reuse the frequency spectrum resources occupied by the old cells.

Fig. 1 is a flowchart illustrating a method for sharing an FDD spectrum between an LTE system and other systems in an embodiment of the present invention, where the method includes the following implementation steps:

step (1): for FDD spectrum a occupied by some old mobile communication system (corresponding to the first mobile communication system in the claims), the eNodeB determines: the old mobile communication system uses a bandwidth A1 and the LTE system uses a bandwidth A2, A1+ A2= A0, and A0 is a bandwidth of a spectrum a.

Preferably, the eNodeB can determine A1 and A2 according to the configuration of an Operation Maintenance Center (OMC) or a Local Maintenance Terminal (LMT).

Step (2): the eNodeB divides the spectrum a into two sections: one bandwidth segment A1 is used to establish an old cell (corresponding to the first mobile communication system cell in the claims), and another bandwidth segment A2 is used to establish one or more FDD LTE cells at the spectrum location corresponding to the bandwidth segment.

Preferably, the eNodeB may divide the entire spectrum a into two segments of spectrum according to the configuration of the OMC or the LMT, where the bandwidths of the two segments of spectrum are A1 and A2, respectively.

As to how to establish the old cell on the spectrum of the bandwidth A1, reference may be made to the prior art, and details thereof are not repeated herein.

And (3): the eNodeB establishes one or more LAA cells on an uplink frequency spectrum and a downlink frequency spectrum corresponding to the frequency band with the bandwidth of A1 respectively.

And (4): when the UE accesses to one FDD LTE cell, the UE reports UE capability information to the eNodeB, and the eNodeB stores the UE capability information.

And (5): when "UE capability information" indicates: when the UE supports uplink and/or downlink LAA characteristics, the eNodeB may configure one or more FDD LTE cells and one or more LAA cells as secondary cells to the UE according to a service application of the UE, "UE capability information," the load condition of each FDD LTE cell and the load condition of each LAA cell.

And (6): for the UE supporting the uplink LAA feature (specifically, including the UE supporting only the uplink LAA feature and the UE supporting both the uplink LAA feature and the downlink LAA feature), when the eNodeB schedules the uplink resource for transmitting the uplink service of the UE, the eNodeB allocates the PUSCH to the UE in each FDD LTE cell configured to the UE and each cell for transmitting the uplink service in each LAA cell. When the PUSCH resources are successfully distributed to the UE in a certain cell, the eNodeB sends the scheduling information of the PUSCH to the UE through a control channel, and then receives the PUSCH sent by the UE in the corresponding cell according to the scheduling information of the PUSCH.

For the UE supporting the downlink LAA characteristic (specifically, including the UE supporting only the downlink LAA characteristic and the UE supporting both the uplink LAA characteristic and the downlink LAA characteristic), when scheduling the downlink resource for transmitting the downlink service of the UE, the eNodeB allocates the PDSCH resource to the UE in each FDD LTE cell configured to the UE and each cell for transmitting the downlink service in each LAA cell. When the PDSCH resources are successfully distributed to the UE in a certain cell, the eNodeB sends the scheduling information of the PDSCH to the UE through a control channel, and sends the PDSCH to the UE in the corresponding cell according to the scheduling information of the PDSCH.

The control channel for transmitting the scheduling information may be PDCCH, EPDCCH, MPDCCH, or SPDCCH.

And (7): and the UE monitors the control channel, and sends a corresponding PUSCH in a corresponding cell or receives a corresponding PDSCH in the corresponding cell according to the monitored scheduling information on the control channel.

To sum up, the LAA cells are established on the uplink and downlink spectrum occupied by the old mobile communication system, and configured as the secondary cell of the UE supporting the uplink and/or downlink LAA characteristics, so that the resources on the corresponding spectrum can be used when the old mobile communication system is idle, the utilization rate and efficiency of the corresponding spectrum are improved, and the evolution of the old mobile communication system to the LTE system is better supported.

In step (2) above, the eNodeB divides the spectrum a into two segments: one section of bandwidth is A1 and is used for establishing an old cell, the other section of bandwidth is A2, and one or more FDD LTE cells are established at the frequency spectrum position corresponding to the section of bandwidth. The established bandwidth and carrier frequency point of each FDD LTE cell are determined according to the following method:

firstly, the eNodeB determines the number of established FDD LTE cells, the spectrum location of each FDD LTE cell, and the occupied spectrum bandwidth on a frequency band with a bandwidth of A2. The eNodeB may determine the number of FDD LTE cells established on a corresponding frequency band, a spectrum location of each FDD LTE cell, and an occupied spectrum bandwidth according to the configuration of the OMC or the LMT.

In the 3GPP protocol, the bandwidth of an LTE cell can only be: 1.4M, 3M, 5M, 10M, 15M or 20M.

Preferably, when a spectrum bandwidth B occupied by a certain FDD LTE cell is a value in the bandwidth values of the LTE cells, it is determined that the bandwidth of the FDD LTE cell is B. If the value of B is not the bandwidth value of the LTE cell due to actual requirements, the minimum bandwidth value larger than B may be selected as the bandwidth of the FDD LTE cell from the bandwidth values of the LTE cell. The carrier frequency point of the FDD LTE cell is the central frequency point of the frequency spectrum occupied by the cell.

In the step (3), the eNodeB establishes one or more LAA cells on the uplink and downlink frequency spectrums corresponding to the frequency band with the bandwidth A1. The method for determining the bandwidth and the carrier frequency point of each LAA cell comprises the following steps:

firstly, the eNodeB determines the number of LAA cells established on the uplink/downlink spectrum corresponding to the frequency band with the bandwidth A1, the spectrum location of each LAA cell, and the occupied spectrum bandwidth. The eNodeB may determine the number of LAA cells established on the corresponding uplink/downlink spectrum, the spectrum location of each LAA cell, and the occupied spectrum bandwidth according to the configuration of the OMC or LMT.

An LAA cell is a special LTE cell, and when a spectrum bandwidth C occupied by a certain LAA cell is a value among bandwidth values of the LTE cell, the bandwidth of the LAA cell is C. If the value of C is not the bandwidth value of the LTE cell, the bandwidth of the LAA cell may be selected from the bandwidth values of the LTE cell, which is a minimum bandwidth value greater than C or a maximum bandwidth value less than C. The carrier frequency point of the LAA cell is the central frequency point of the frequency spectrum occupied by the cell.

In the step (4), when the UE accesses one FDD LTE cell, the UE reports "UE capability information" to the eNodeB, and the eNodeB stores the information. Specifically, the "UE capability information" reported by the UE includes the following information:

when the UE supports Carrier Aggregation (CA), the UE carries CA related capability information in 'UE capability information';

when the UE supports the uplink LAA feature, the "UE capability information" carries: IE related to uplink LAA characteristics clearly defined in the 3gpp ts36.331 protocol and newly added IE "uplink LAA frequency band information";

when the UE supports the downlink LAA feature, the "UE capability information" carries: IE related to the downlink LAA characteristics clearly defined in the 3gpp ts36.331 protocol and new IE "downlink LAA band information".

Currently, in the 3GPP LTE protocol, the frequency BAND corresponding to the LAA characteristic is BAND46, and in order to implement the method for sharing the FDD spectrum between the LTE system and other systems described in the present invention, the frequency BAND corresponding to the LAA characteristic needs to be extended to other "unlicensed spectrum" and each "licensed spectrum". Therefore, the UE that needs to support the method of the present invention reports each supported uplink LAA band and each supported downlink LAA band respectively through the new IE "uplink LAA band information" and the new IE "downlink LAA band information" in the "UE capability information".

In the step (5), when the "UE capability information" indicates that the UE supports the uplink and/or downlink LAA characteristics, the eNodeB may configure one or more FDD LTE cells and one or more LAA cells as secondary cells to the UE according to a service application of the UE, the "UE capability information", the load condition of each FDD LTE cell, and the load condition of each LAA cell. Specifically, the process of the eNodeB configuring the secondary cell for the UE is as follows:

specifically, the method for the eNodeB to configure one or more FDD LTE cells as secondary cells to the UE is as follows:

when multiple FDD LTE cells are established in step (2), if the "UE capability information" carries CA-related capability information, the eNodeB determines, according to the information, FDD LTE cells supported by the UE in other FDD LTE cells other than the FDD LTE cell to which the UE accesses, and the eNodeB selects one or more FDD LTE cells among the FDD LTE cells supported by the UE as secondary cells to configure to the UE according to the service application of the UE and the load conditions of the FDD LTE cells supported by the UE. For any FDD LTE cell configured for a UE, the eNodeB may specify that only the uplink traffic of the UE is carried in the cell, only the downlink traffic of the UE is carried in the cell, or both the uplink and downlink traffic of the UE are carried in the cell.

Specifically, the method for the eNodeB to configure one or more LAA cells as secondary cells to the UE is as follows:

and (3) the eNodeB determines LAA cells supported by the UE in each LAA cell established in the step (3) according to the IE related to the uplink LAA characteristic in the UE capability information, the IE related to the downlink LAA characteristic, the IE "uplink LAA frequency band information" and the IE "downlink LAA frequency band information", and selects one or more LAA cells from the LAA cells supported by the UE as auxiliary cells to be configured to the UE according to the service application of the UE and the load condition of the LAA cells supported by the UE. For any LAA cell configured to the UE, the eNodeB may specify that only the uplink service of the UE is carried in the LAA cell, only the downlink service of the UE is carried in the LAA cell, or both the uplink service and the downlink service of the UE are carried in the LAA cell.

Preferably, for an LAA cell established on an uplink spectrum corresponding to a frequency band with a bandwidth of A1, the eNodeB only carries uplink traffic of the UE through the cell. For the UE supporting the uplink LAA feature, the eNodeB may configure a plurality of LAA cells in the LAA cells as secondary cells to the UE for carrying the uplink service of the UE.

Preferably, for an LAA cell established on the downlink spectrum corresponding to the frequency band with the bandwidth of A1, the eNodeB only carries the downlink service of the UE through the cell. For the UE supporting the downlink LAA feature, the eNodeB may configure a plurality of LAA cells in the LAA cells as secondary cells to the UE for carrying the downlink service of the UE.

For any LAA cell configured to the UE, when the cell is used for bearing downlink service of the UE, the eNodeB allocates PUCCH resources to the LAA cell, and ACK/NACK information of a Transmission Block (TB) on a PDSCH of the LAA cell is fed back to the eNodeB through the PUCCH on the allocated PUCCH resources. Preferably, the eNodeB allocates a PUCCH resource to the LAA cell in the FDD LTE cell accessed by the UE, and the ACK/NACK information of the TB on the PDSCH of the LAA cell is fed back to the eNodeB through the PUCCH resource allocated in the FDD LTE cell accessed by the UE. Of course, the eNodeB may also instruct the UE to: and the ACK/NACK information of the TB on the PUSCH of the LAA cell is fed back to the eNodeB through the latest PUSCH in the FDD LTE cell accessed by the UE.

For an LAA cell configured to the UE, the eNodeB may notify the UE of the scheduling information of the PUSCH/PDSCH of the LAA cell through a control channel of the LAA cell. Preferably, the eNodeB employs cross-carrier scheduling, and notifies the UE of the scheduling information of the PUSCH/PDSCH of the LAA cell through the DCI format of the carrier indication field carried on the control channel of the FDD LTE cell accessed by the UE.

For an LAA cell configured to a UE, when an eNodeB performs cross-carrier scheduling on the LAA cell, the eNodeB allocates a unique "cross-carrier scheduling carrier subscript" for the LAA cell, where the subscript is used to distinguish different cells in a DCI format carrying a carrier indication field.

After the eNodeB configures the secondary cells for the UE through the above process, the eNodeB sends the configuration information of each secondary cell to the UE through dedicated signaling. The UE receives the special signaling, stores the configuration information of each auxiliary cell in the special signaling, and feeds back a response message to the eNodeB to show that: and the UE completes the configuration of each secondary cell.

In the step (6), when the PUSCH resources are successfully allocated to the UE in a certain cell, the eNodeB transmits the scheduling information of the PUSCH to the UE through the control channel, and when the PDSCH resources are successfully allocated to the UE in a certain cell, the eNodeB transmits the scheduling information of the PDSCH to the UE through the control channel. Specifically, when the "certain cell" is an LAA cell, the method for the eNodeB to send the scheduling information of the PUSCH/PDSCH of the LAA cell to the UE through the control channel is as follows:

if the eNodeB does not adopt cross-carrier scheduling to the LAA cell, the eNodeB sends the scheduling information of the PUSCH/PDSCH of the LAA cell to the UE through the control channel of the LAA cell; if the eNodeB adopts cross-carrier scheduling to the LAA cell, the eNodeB informs the UE of the scheduling information of the PUSCH/PDSCH of the LAA cell through a DCI format of a carrier indication domain carried on a control channel of an FDD LTE cell accessed by the UE. The value of the carrier indication field in the DCI format is equal to the "cross-carrier scheduling carrier subscript" assigned to the LAA cell by the eNodeB.

In the step (7), the UE monitors the control channel, and transmits the corresponding PUSCH in the corresponding cell or receives the corresponding PDSCH in the corresponding cell according to the monitored scheduling information on the control channel. Specifically, the process of the UE monitoring the control channel is as follows:

for an LAA cell configured to the UE, if the configuration information of the cell does not carry an IE "cross-carrier scheduling carrier subscript", the UE monitors a control channel of the LAA cell to capture scheduling information of a PUSCH/PDSCH of the LAA cell.

If the configuration information of the cell carries the IE "cross-carrier scheduling carrier subscript", the UE monitors a control channel of an FDD LTE cell accessed by the UE to capture the scheduling information of the PUSCH/PDSCH of the LAA cell. Specifically, when the UE monitors the PDCCH in the accessed FDD LTE cell, and a DCI format on the PDCCH carries a carrier indication field, and a value of the carrier indication field is equal to a value indicated by the IE "cross-carrier scheduling carrier subscript", the UE considers that the PDCCH is used for scheduling the LAA cell, and sends a corresponding PUSCH in the LAA cell or receives a corresponding PDSCH in the LAA cell according to uplink or downlink scheduling information in the DCI format on the PDCCH.

When the UE receives the PDSCH in one LAA cell, the UE feeds back ACK/NACK information of the TB on the received PDSCH to the eNodeB. The specific feedback process is as follows:

when the UE determines according to the stored configuration information of the LAA cell: when the ACK/NACK information of the TB on the PDSCH of the LAA cell is fed back through the PUCCH resource allocated to the LAA cell in the FDD LTE cell accessed by the UE, the UE sends the corresponding PUCCH to the eNodeB through the allocated PUCCH resource in the FDD LTE cell accessed by the UE, and the PUCCH carries the ACK/NACK information of the TB on the PDSCH of the LAA cell.

When the UE determines that the LAA cell is configured according to the stored configuration information of the LAA cell: when the ACK/NACK information of the TB on the PDSCH of the LAA cell is fed back through the latest PUSCH in the FDD LTE cell accessed by the UE, the UE carries the ACK/NACK information of the TB on the PDSCH of the LAA cell in the FDD LTE cell accessed by the UE through the latest PUSCH.

When the UE determines according to the stored configuration information of each auxiliary cell: and when ACK/NACK information of TBs on PDSCHs of a plurality of auxiliary cells is fed back through a nearest PUSCH in an FDD LTE cell accessed by the UE, the ACK/NACK information of the TBs on the PDSCHs of the plurality of cells is concatenated in sequence to form an ACK/NACK information bit stream which is carried to the eNodeB through the PUSCH when the ACK/NACK information of the TBs on the PDSCHs of the plurality of cells is fed back on the same PUSCH in the FDD LTE cell accessed by the UE.

Specifically, the eNodeB configures the secondary cells for the UE in step (5), and sends configuration information of each secondary cell configured for the UE to the UE through dedicated signaling. When ACK/NACK information of TBs on PDSCHs of a plurality of cells happens to be fed back on the same PUSCH in an FDD LTE cell accessed by the UE, the UE concatenates the ACK/NACK information of the cells to form an ACK/NACK information bit stream according to the sequence of the configuration information of the cells in the special signaling, and the ACK/NACK information is carried to the eNodeB through the PUSCH.

Corresponding to the above method, the present application further provides a base station device, whose composition structure is shown in fig. 2, including: the system comprises a spectrum division module, a cell establishment module, a capability acquisition module and a configuration module, wherein:

the cell establishing module is used for establishing one or more first mobile communication system cells at the frequency spectrum position corresponding to the bandwidth A1, establishing one or more FDD LTE cells at the frequency spectrum position corresponding to the bandwidth A2, and respectively establishing one or more authorized auxiliary access LAA cells at the uplink frequency spectrum and the downlink frequency spectrum corresponding to the frequency band with the bandwidth A1;

the configuration module is configured to, when the UE capability information indicates: and when the UE supports the uplink and/or downlink LAA characteristics, according to the service application of the UE, the UE capability information, the load condition of each FDD LTE cell and the load condition of each LAA cell, configuring one or more FDD LTE cells and one or more LAA cells as auxiliary cells to the UE.

The following describes the specific implementation of the technical solution of the present application by a specific example:

at present, the domestic public security private network establishes a PDT system by using the following frequency spectrum resources: FDD spectrum dedicated for public security: 351-356MHz (UL)/361-366 MHz (DL), and 5M bandwidth. In order to realize the evolution of the PDT system in the frequency spectrum to the LTE system, the method of the invention can be adopted for improvement, and specifically:

the method of the invention is adopted to divide the 5M FDD frequency spectrum into two sections, and the bandwidths of the two sections of frequency spectrum are respectively 3M and 2M. An FDD LTE cell with the bandwidth of 3M is established on the frequency spectrum of 3M, and a PDT cell is established on the frequency spectrum of 2M. The PDT cell is established as the prior art. In order to use the resources of the 2M spectrum when the PDT cell is idle, 1 LAA cell is established on the uplink and downlink spectrum of the 2M spectrum, respectively. Each LAA cell may carry uplink traffic and/or downlink traffic of the UE. Preferably, the LAA cell on the uplink spectrum can be used to carry uplink traffic of only the UE supporting the uplink LAA feature; the LAA cell on the downlink spectrum may be used to carry downlink traffic only for UEs that support the downlink LAA feature.

The bandwidth of an LAA cell established in the 2M uplink spectrum is 1.4M or 3M, and the carrier frequency point of the cell is the center of the 2M uplink spectrum. When the bandwidth of a cell is 3M, the eNodeB schedules the PUSCH, PUCCH or SRS of the UE only in the 2M bandwidth with the carrier frequency point as the center.

Preferably, the bandwidth of the LAA cell established in the downlink spectrum is 1.4M, and the carrier frequency point of the LAA cell is the center of the 2M downlink spectrum.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A method for sharing FDD spectrum with other systems in LTE system, comprising:

the eNodeB divides the FDD spectrum a occupied by the first mobile communication system into two sections: a section of bandwidth is A1, and one or more first mobile communication system cells are established at the frequency spectrum position corresponding to the section of bandwidth; the other section of bandwidth is A2, and one or more FDD LTE cells are established at the frequency spectrum position corresponding to the section of bandwidth; wherein, A1+ A2= A0, and A0 is the bandwidth of the frequency spectrum a;

when the UE capability information indicates: when the UE supports uplink and/or downlink LAA characteristics, the eNodeB configures one or more FDD LTE cells and one or more LAA cells as auxiliary cells to the UE according to the service application of the UE, the UE capability information, the load condition of each FDD LTE cell and the load condition of each LAA cell;

for the UE supporting the uplink LAA characteristic, when scheduling uplink resources for transmitting the uplink service of the UE, an eNodeB allocates PUSCH resources to the UE in each FDD LTE cell and each LAA cell configured for the UE and used for transmitting the uplink service; the UE monitors a control channel and sends a corresponding PUSCH in a corresponding cell according to the monitored scheduling information on the control channel;

2. The method of claim 1, wherein the established bandwidth and carrier frequency points of the FDD LTE cell are determined according to the following methods:

the eNodeB determines the number of the established FDD LTE cells, the frequency spectrum position of each FDD LTE cell and the occupied frequency spectrum bandwidth on the frequency band with the bandwidth of A2 according to the configuration of an operation maintenance center OMC or a local maintenance terminal LMT; wherein, the bandwidth value of the LTE cell comprises: 1.4M, 3M, 5M, 10M, 15M or 20M;

3. The method of claim 1, wherein the established bandwidth and carrier frequency points of the LAA cell are determined according to the following method:

when the frequency spectrum bandwidth C occupied by an LAA cell is a value in the bandwidth value of an LTE cell, determining the bandwidth of the LAA cell as C; wherein, the bandwidth value of the LTE cell comprises: 1.4M, 3M, 5M, 10M, 15M or 20M;

4. The method of claim 1, wherein reporting the UE capability information by the UE comprises:

when the UE supports the uplink LAA feature, the UE capability information carries: IE and newly added IE related to uplink LAA characteristics defined in the 3gpp ts36.331 protocol: uplink LAA frequency band information IE; the uplink LAA frequency band information IE is used for reporting each uplink LAA frequency band supported by the UE;

when the UE supports the downlink LAA feature, the UE capability information carries: IE related to the downlink LAA characteristics and newly added IE defined in the 3GPP TS36.331 protocol: downlink LAA frequency band information IE; and the downlink LAA frequency band information IE is used for reporting each downlink LAA frequency band supported by the UE.

5. The method of claim 4, wherein:

the eNodeB configuring one or more FDD LTE cells as secondary cells to the UE comprises:

6. The method of claim 5, wherein:

for an LAA cell established on an uplink frequency spectrum corresponding to a frequency band with the bandwidth of A1, an eNodeB only bears the uplink service of UE through the cell;

for an LAA cell established on a downlink frequency spectrum corresponding to a frequency band with a bandwidth of A1, an eNodeB only carries downlink services of UE through the cell.

7. The method of claim 1, wherein the eNodeB allocating PUSCH and/or PDSCH resources to the UE comprises:

8. The method of claim 7, wherein:

an eNodeB allocates PUCCH resources to an LAA cell in an FDD LTE cell accessed by the UE, and ACK/NACK information of a TB on a PDSCH of the LAA cell is fed back to the eNodeB through the PUCCH on the PUCCH resources allocated in the FDD LTE cell accessed by the UE;

9. The method of claim 7, wherein:

for any LAA cell configured to the UE, the eNodeB informs the UE of the scheduling information of the PUSCH/PDSCH of the LAA cell through a control channel of the LAA cell;

10. The method according to any of claims 2 to 9, wherein the process of the UE listening to the control channel comprises:

if the configuration information of the LAA cell carries the IE cross-carrier scheduling carrier subscript, the UE monitors a control channel of an FDD LTE cell accessed by the UE to capture the scheduling information of the PUSCH/PDSCH of the LAA cell; when the UE monitors the PDCCH in the accessed FDD LTE cell, and a DCI format on the PDCCH carries a carrier indication domain, and the value of the carrier indication domain is equal to the value indicated by the IE cross-carrier scheduling carrier subscript, the UE considers the PDCCH to be used for scheduling the LAA cell, and sends a corresponding PUSCH in the LAA cell or receives a corresponding PDSCH in the LAA cell according to uplink or downlink scheduling information in the DCI format on the PDCCH.

11. The method of claim 10, further comprising:

when the UE receives the PDSCH in an LAA cell, the UE feeds back ACK/NACK information of the TBs on the received PDSCH to the eNodeB, and the specific feedback process includes:

when the UE determines that the LAA cell is configured according to the stored configuration information of the LAA cell: when the ACK/NACK information of the TB on the PDSCH of the LAA cell is fed back through the nearest PUSCH in the FDD LTE cell accessed by the UE, the UE carries the ACK/NACK information of the TB on the PDSCH of the LAA cell in the FDD LTE cell accessed by the UE through the nearest PUSCH;

12. The method of claim 11, wherein:

when the eNodeB configures the auxiliary cells for the UE, the eNodeB sends the configuration information of each auxiliary cell configured for the UE to the UE through a special signaling;

13. A base station apparatus, comprising: the system comprises a spectrum division module, a cell establishment module, a capability acquisition module and a configuration module, wherein:

the configuration module is configured to, when the UE capability information indicates: when the UE supports uplink and/or downlink LAA characteristics, one or more FDD LTE cells and one or more LAA cells are configured to the UE as auxiliary cells according to the service application of the UE, the UE capability information, the load condition of each FDD LTE cell and the load condition of each LAA cell;

the base station device further includes a scheduling module, and the scheduling module is configured to: