CN113765631B

CN113765631B - Cross-frequency-band carrier aggregation method and base station

Info

Publication number: CN113765631B
Application number: CN202010484537.5A
Authority: CN
Inventors: 曾凯越; 江天明; 曹丽芳; 徐晓东; 邓伟; 杨拓
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Zijin Jiangsu Innovation Research Institute Co ltd; China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2023-05-09
Anticipated expiration: 2040-06-01
Also published as: CN113765631A

Abstract

The invention provides a cross-frequency band carrier aggregation method and a base station, belonging to the technical field of wireless communication, wherein the method comprises the following steps: determining whether uplink time slot overlap exists between the member carriers according to frame structure information and frame head position related information of each member carrier; if uplink time slot overlap exists, determining the offset of a target member carrier according to the frame structure information and the frame head position related information of each member carrier so as to update the frame head position of the target member carrier; the offset of the target member carrier is a forward offset or a backward offset required for minimizing uplink time slot overlap between the member carriers, and the target member carrier is one or more of the member carriers. The invention can avoid the problem of single-stream rate drop caused by uplink simultaneous transmission, maximally ensures the uplink transmission power of each frequency band, realizes uplink double or multiple transmission, and can increase the uplink rate by one time compared with the uplink rate before staggered.

Description

Cross-frequency-band carrier aggregation method and base station

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a method and a base station for cross-band carrier aggregation.

Background

In the related art, for New Radio (NR) carrier aggregation (Carrier Aggregation, CA), it is required that all cell system frame numbers and frame timings are aligned. I.e. for inter-band CA of the existing network, it is required that two or more component carriers are each implemented based on frame header alignment. However, in the NR stage, different frame structures exist between different component carriers in carrier aggregation, for example, carrier aggregation is performed by using a 2.6GHz carrier and a 4.9GHz carrier shown in fig. 1, and if, according to a conventional implementation manner, when the frame start positions of the component carriers are aligned, there is a case of overlapping uplink timeslots (or called uplink timeslot overlapping) between carriers and transmitting simultaneously.

According to the radio frequency front end architecture of the existing terminal device shown in fig. 2, different component carriers are mutually isolated in frequency bands, and different frequency bands correspond to different radio frequency front ends, so that transceiving is realized through independent antennas. If the radio frequency antennas of two member carriers simultaneously perform uplink transmission in the CA scene, the maximum transmission power of each frequency band is halved or 3dB loss is brought under the premise that the total power of the terminal equipment is unchanged, and under the condition, the uplink transmission can only be performed in a single stream, normal double transmission can not be realized, and the uplink service rate is greatly influenced.

Disclosure of Invention

In view of this, the present invention provides a method and a base station for cross-band carrier aggregation, which are used for solving the problem that the current inter-band carrier aggregation functions are all realized based on frame header alignment, and under the condition that different frame structures are ignored, power is limited due to overlapping of uplink time slots, so that the uplink rate is affected.

In order to solve the above technical problems, in a first aspect, the present invention provides a method for cross-band carrier aggregation, which is applied to a base station, and includes:

determining whether uplink time slot overlap exists between the member carriers according to frame structure information and frame head position related information of each member carrier;

if uplink time slot overlap exists, determining the offset of a target member carrier according to the frame structure information and the frame head position related information of each member carrier so as to update the frame head position of the target member carrier;

the offset of the target member carrier is a forward offset or a backward offset required for minimizing uplink time slot overlap between the member carriers, and the target member carrier is one or more of the member carriers.

Optionally, after the step of determining the offset of the target member carrier according to the frame structure information and the frame header position related information of each member carrier, the method further includes:

And transmitting the offset of the target member carrier to a network manager to update the frame head position of the target member carrier and update the frame head positions of carriers which are the same as the target member carrier of other base stations.

Optionally, the member carrier includes a member carrier of the base station and a member carrier of a different station, and before the step of determining whether there is uplink timeslot overlapping between the member carriers according to frame structure information and frame header position related information of each member carrier, the method further includes:

and acquiring the frame structure information and the frame head position related information of the member carrier of the different station through an X2 interface or a southbound interface between the member carrier and a network manager.

Optionally, the step of determining the offset of the target member carrier according to the frame structure information and the frame header position related information of each member carrier includes:

for each first member carrier in turn, shifting a frame period of the first member carriers according to a preset step length, wherein the total number of the member carriers is N, and the first member carriers are N-1 member carriers;

for each first member carrier, determining the offset with the smallest uplink time slot overlap between the first member carrier and a third member carrier as the preferred offset of the first member carrier; the third member carrier comprises a second member carrier and a member carrier of the first member carrier, wherein the member carrier has determined a preferred offset and is shifted according to the determined preferred offset, and the second member carrier is another member carrier of the N member carriers except the first member carrier;

After determining the preferred offset of the last first member carrier, determining one or more offset modes capable of minimizing uplink time slot overlapping between the member carriers as target offset modes, wherein the member carriers and/or offsets required to be shifted in each offset mode are different, and the member carriers required to be shifted in the target offset mode are the target member carriers.

Optionally, for each first component carrier in turn, the step of shifting one frame period of the first component carrier according to a preset step length includes:

and shifting the first member carriers according to the preset step length in sequence from short to long or from long to short according to the frame period of the first member carriers, wherein the second member carrier is the member carrier with the longest frame period in the member carriers.

acquiring a subcarrier interval of each member carrier;

and selecting the time slot length of the member carrier with the largest subcarrier interval as a preset step length of the offset.

determining one or more target offset modes capable of minimizing uplink time slot overlapping among the member carriers according to frame structure information and frame head position related information of each member carrier, wherein the member carriers and/or offset required to be shifted by each target offset mode are different;

negotiating with other base stations, and determining that the member carrier needing to be offset in one of the target offset modes is the target member carrier, and the offset of the member carrier needing to be offset is the offset of the target member carrier.

Optionally, the step of determining the offset of the target member carrier according to the frame structure information and the frame header position related information of each member carrier to update the frame header position of the target member carrier includes:

The step of sending the offset of the target member carrier to a network manager to update the frame header position of the target member carrier includes:

transmitting the one or more target offset modes capable of minimizing uplink time slot overlapping between the member carriers to the network manager;

and receiving frame head position configuration information issued by the network manager, wherein the frame head position configuration information is used for configuring the member carrier wave which is required to be offset by the base station according to a first target offset mode and a corresponding offset, and the first target offset mode is a target offset mode which is the same as the target offset modes reported by other base stations by the base station.

In a second aspect, the present invention also provides a base station, including:

the judging module is used for determining whether uplink time slot overlap exists between the member carriers according to the frame structure information and the frame head position related information of each member carrier;

the determining module is used for determining the offset of the target member carrier according to the frame structure information and the frame head position related information of each member carrier if uplink time slot overlap exists, so as to update the frame head position of the target member carrier;

Optionally, the base station further includes:

and the updating module is used for sending the offset of the target member carrier to a network manager so as to update the frame head positions of the target member carrier and update the frame head positions of carriers which are the same as the target member carrier of other base stations.

Optionally, the base station further includes:

the acquisition module is used for acquiring frame structure information and frame head position related information of the member carrier of the different station through an X2 interface or a southbound interface between the member carrier and a network manager when the member carrier comprises the member carrier of the base station and the member carrier of the different station.

Optionally, the determining module includes:

the shifting unit is used for sequentially shifting one frame period of each first member carrier according to a preset step length, wherein the total number of the member carriers is N, and the first member carriers are N-1 member carriers;

a first determining unit, configured to determine, for each of the first component carriers, an offset with a smallest uplink time slot overlap between the first component carrier and a third component carrier as a preferred offset of the first component carrier; the third member carrier comprises a second member carrier and a member carrier of the first member carrier, wherein the member carrier has determined a preferred offset and is shifted according to the determined preferred offset, and the second member carrier is another member carrier of the N member carriers except the first member carrier;

And the second determining unit is used for determining one or more offset modes capable of minimizing uplink time slot overlapping among the component carriers as target offset modes after determining the preferred offset of the last first component carrier, wherein the component carriers and/or the offset amounts required to be shifted in each offset mode are different, and the component carriers required to be shifted in the target offset mode are the target component carriers.

Optionally, the shifting unit is configured to shift the first component carrier sequentially according to the preset step length in order of a frame period of the first component carrier from short to long or from long to short, where the second component carrier is a component carrier with a longest frame period in the component carriers.

Optionally, the determining module includes:

a subcarrier interval acquiring unit, configured to acquire a subcarrier interval of each of the member carriers;

and the offset step length determining unit is used for selecting the time slot length of the member carrier with the largest subcarrier interval as a preset offset step length.

Optionally, the determining module includes:

a third determining unit, configured to determine, according to frame structure information and frame header position related information of each component carrier, one or more target offset manners capable of minimizing uplink time slot overlapping between the component carriers, where each of the target offset manners requires a different shift of the component carrier and/or offset;

And the negotiation unit is used for negotiating with other base stations, determining that the member carrier needing to be offset in one of the target offset modes is the target member carrier, and determining that the offset of the member carrier needing to be offset is the offset of the target member carrier.

Optionally, the determining module includes:

a fourth determining unit, configured to determine, according to frame structure information and frame header position related information of each component carrier, one or more target offset manners capable of minimizing uplink time slot overlapping between the component carriers, where each of the target offset manners requires a different shift of the component carrier and/or offset;

the updating module comprises:

a sending unit, configured to send the one or more target offset manners capable of minimizing uplink time slot overlapping between the component carriers to the network manager;

the configuration unit is configured to receive frame header position configuration information sent by the network manager, where the frame header position configuration information is configured to configure the base station to offset according to the member carrier and the corresponding offset that need to be offset in a first target offset manner, where the first target offset manner is a target offset manner that is the same as the target offset manners reported by other base stations by the base station.

In a third aspect, the present invention also provides a base station, including: a transceiver and a processor;

the processor is used for determining whether uplink time slot overlap exists between the member carriers according to the frame structure information and the frame head position related information of each member carrier;

the processor is further configured to determine an offset of a target member carrier according to frame structure information and frame header position related information of each member carrier if there is uplink timeslot overlapping, so as to update a frame header position of the target member carrier;

Optionally, the transceiver is configured to send the offset of the target member carrier to a network manager, so as to update the frame header position of the target member carrier, and update the frame header positions of carriers identical to the target member carrier of other base stations.

Optionally, the transceiver is configured to obtain, when the member carrier includes the member carrier of the base station and a member carrier of a different station, frame structure information and frame header position related information of the member carrier of the different station through an X2 interface or a southbound interface between the member carrier and a network manager.

Optionally, the processor is configured to shift, for each first member carrier in sequence, one frame period of the first member carrier according to a preset step length, where the total number of the member carriers is N, and the first member carrier is N-1 of the member carriers;

the processor is further configured to determine, for each of the first component carriers, an offset with a smallest uplink time slot overlap between the first component carrier and a third component carrier as a preferred offset of the first component carrier; the third member carrier comprises a second member carrier and a member carrier of the first member carrier, wherein the member carrier has determined a preferred offset and is shifted according to the determined preferred offset, and the second member carrier is another member carrier of the N member carriers except the first member carrier;

the processor is further configured to determine, after determining a preferred offset of a last first component carrier, one or more offset manners capable of minimizing uplink time slot overlapping between component carriers as a target offset manner, where the component carrier and/or the offset to be shifted in each offset manner is different, and the component carrier to be shifted in the target offset manner is the target component carrier.

Optionally, the processor is configured to shift the first component carriers sequentially according to the preset step length in order of a frame period of the first component carrier from short to long or from long to short, and the second component carrier is a component carrier with a longest frame period in the component carriers.

Optionally, the processor is configured to obtain a subcarrier interval of each component carrier;

the processor is further configured to select a time slot length of the member carrier with the largest subcarrier spacing as a preset step length of the offset.

Optionally, the processor is configured to determine, according to frame structure information and frame header position related information of each component carrier, one or more target offset modes capable of minimizing uplink time slot overlapping between the component carriers, where each target offset mode needs to be shifted by a different component carrier and/or offset;

the processor is further configured to negotiate with other base stations to determine that the member carrier needing to be shifted by the target shift mode is the target member carrier, and that the offset of the member carrier needing to be shifted is the offset of the target member carrier.

the transceiver is configured to send the one or more target offset manners capable of minimizing uplink time slot overlapping between the member carriers to the network manager;

the transceiver is further configured to receive frame header position configuration information sent by the network manager, where the frame header position configuration information is used to configure the base station to offset the member carrier and the corresponding offset according to a first target offset mode, where the first target offset mode is a target offset mode that is the same as the target offset modes reported by other base stations by the base station.

In a fourth aspect, the present invention also provides a terminal, including a memory, a processor, and a program stored on the memory and executable on the processor; the steps in any of the above methods for cross-band carrier aggregation are implemented when the processor executes the program.

In a fifth aspect, the present invention also provides a readable storage medium having stored thereon a program which when executed by a processor performs the steps of any of the above methods of cross-band carrier aggregation.

The technical scheme of the invention has the following beneficial effects:

in the embodiment of the invention, a cross-frequency band carrier aggregation scheme for realizing uplink timing error by adaptively adjusting frame head offset is provided, so that the problem of single-stream rate reduction caused by uplink simultaneous transmission can be avoided, the uplink transmission power of each frequency band is ensured to the maximum, uplink double or multiple transmission is realized, the uplink rate can be doubled compared with that before staggering, and the uplink performance is optimized. In addition, the embodiment of the invention flexibly realizes the inter-band carrier aggregation of different frequency band combinations through the self-adaptive frame offset adjusting function, increases the flexibility and universality of the inter-band carrier aggregation under different frame structures, and saves the labor maintenance cost.

Drawings

Fig. 1 is a schematic diagram of an uplink overlap between carrier aggregation bands based on frame header alignment;

fig. 2 is a schematic diagram of a radio frequency front end architecture of a terminal device;

fig. 3 is a flowchart of a method for cross-band carrier aggregation in an embodiment of the present invention;

Fig. 4 is a schematic diagram of a conventional carrier aggregation frame header configuration flow;

fig. 5 is a schematic diagram of a carrier aggregation adaptive uplink timing sequence;

fig. 6 is a schematic diagram of a manner in which a base station obtains member carrier information of a different station;

fig. 7 is a flowchart of another method for cross-band carrier aggregation according to an embodiment of the present invention;

FIG. 8 is a diagram of a staggered scheme of 2.6GHz and 4.9GHz2.5ms frame period frame structure in an embodiment of the invention;

FIG. 9 is a schematic diagram of a staggered scheme of 2.6GHz and 4.9GHz2.5ms dual cycle frame structure in an embodiment of the invention;

fig. 10 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of another base station according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a base station according to another embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the invention, fall within the scope of protection of the invention.

Referring to fig. 3, fig. 3 is a flowchart of a method for cross-band carrier aggregation according to an embodiment of the present invention, where the method is applied to a base station, and includes the following steps:

step 11: determining whether uplink time slot overlap exists between the member carriers according to frame structure information and frame head position related information of each member carrier;

that is, the base station checks the frame structure information and the frame header position related information of two or more component carriers to determine whether there is uplink slot overlap.

The frame header position related information may be frame header position information or frame header offset information (or referred to as frame header offset information). The member carriers at least comprise member carriers for carrier aggregation under the base station.

Step 12: if uplink time slot overlap exists, determining the offset of a target member carrier according to the frame structure information and the frame head position related information of each member carrier so as to update the frame head position of the target member carrier;

That is, if there is uplink time slot overlapping between the component carriers of carrier aggregation, the base station will adaptively calculate the required offset according to the frame structure and the frame header position related information, and offset the frame header of at least one of the component carriers up to N-1 (the total number of the component carriers is N) forward or backward, so as to achieve the purpose of completely staggering or staggering the uplink time slots between the component carriers as much as possible.

The embodiment of the invention provides a cross-frequency band carrier aggregation scheme for realizing uplink time-staggered by adaptively adjusting frame head offset, which can avoid the problem of single-stream rate reduction caused by uplink simultaneous transmission, maximally ensure uplink transmission power of respective frequency bands, realize uplink double transmission or multiple transmission, and improve one time of uplink rate and optimize uplink performance compared with the uplink rate before staggered.

In addition, in the related art, the frame header parameters (including the frame offset parameters) are fixed, as shown in the existing carrier aggregation frame header configuration flow schematic diagram shown in fig. 4, manual configuration needs to be performed on the network management side in advance, flexible adjustment of different frame structures cannot be realized, and network maintenance cost is high. According to the embodiment of the invention, the inter-band carrier aggregation of different frequency band combinations is flexibly realized through the self-adaptive frame offset adjusting function, the flexibility and universality of the inter-band carrier aggregation under different frame structures are improved, and the labor maintenance cost is saved.

The above-described method of cross-band carrier aggregation is exemplified below.

and transmitting the offset of the target member carrier to a network manager (Operation and Maintenance Center, OMC) to update the frame header position of the target member carrier and update the frame header positions of the carriers which are the same as the target member carrier of other base stations. The other base stations are adjacent base stations or base stations belonging to the same area with the base stations.

In the embodiment of the present invention, referring to fig. 5, after calculating the offset (inter-carrier offset) of one or more component carriers that can minimize the uplink time slot overlap between the component carriers of carrier aggregation by using an adaptive timing algorithm according to different frame structures, the base station needs to send the calculated offset of one or more component carriers to a network manager, and the network manager updates the frame header configuration, then the cell is restarted, the configuration is effective, and the system implements uplink staggering according to the new offset.

In addition, in order to prevent the same frequency interference caused by different offset frequency bands or different offset amounts between different stations, the offset amounts of the same carrier wave in adjacent base stations or other base stations in the same sector need to be updated at the same time. Of course, the offset of the member carriers of the adjacent base stations starting carrier aggregation or other base stations in the same area can also be reported to the network manager by the corresponding base station to update the frame head position. For adjacent base stations without carrier aggregation or other base stations in the same zone, if the same carrier exists as the target member carrier needing to be offset, the frame head position of the carrier needs to be updated according to the offset of the corresponding target member carrier.

Specifically, the step of determining whether uplink time slot overlap exists between the component carriers according to the frame structure information and the frame header position related information of each component carrier includes:

determining whether uplink time slot overlap exists between the member carrier of each base station and the member carrier of the different station according to the frame structure information and the frame head position related information of the member carrier of each base station and the member carrier of the different station;

if there is uplink time slot overlapping, determining the offset of the target member carrier according to the frame structure information and the frame head position related information of each member carrier includes:

if uplink time slot overlapping exists between the member carrier of the base station and the member carrier of the different station, determining the offset of the target member carrier in the member carrier of the base station and the member carrier of the different station according to the frame structure information and the frame head position related information of the member carrier of each base station and the member carrier of the different station.

Wherein the X2 interface is an interface between base stations. The different station is a base station adjacent to the base station or a base station belonging to the same area with the base station.

In the embodiment of the present invention, referring to fig. 6, the base station may obtain the member carrier information of the different station in the following two ways:

1. acquiring from a network manager based on a southbound interface between a base station and the network manager;

2. and acquiring from the neighbor cell based on the X2 interface between the base stations.

The member carrier information of the different station not only comprises the frame structure information and the frame head position related information, but also comprises frequency points.

The interactive signaling of the interface may be: (1) Inter-band-CA Information Request, (2) Inter-band-CA Information Response. The base station reads the Response information to obtain Frequency point (Frequency), frame structure (frame type) information and frame head position related information (frame offset) of the secondary carrier.

That is, in the embodiment of the present invention, one component carrier (i.e., the second component carrier) may be selected to be fixed and not shifted, and then the other component carriers (i.e., the first component carrier) may be sequentially shifted. When shifting the first component carrier, one frame period of the first component carrier needs to be shifted according to a preset step length, and each shift step length needs to record the uplink time slot overlapping amount between the first component carrier and the second component carrier, after completing one frame period (of the first component carrier), an offset capable of enabling the uplink time slot overlapping amount between the first component carrier and the second component carrier to be minimum is selected as a preferred offset, and the preferred offset may be one or more. When shifting the second first member carrier, if the first member carrier has only one preferred offset, then shifting the first member carrier by the one preferred offset, and shifting the second first member carrier by a frame period of the second first member carrier by a preset step, where each step of shifting requires recording an uplink time slot overlap amount between the second first member carrier and the second member carrier and the first member carrier shifted by the preferred offset, after completing the frame period (of the second first member carrier), an offset that can minimize the uplink time slot overlap amount between the second first member carrier and the second member carrier and the first member carrier shifted by the preferred offset is selected as the preferred offset of the second first member carrier, and the preferred offset may also be one or more. If the first member carrier has two or more preferred offsets, when shifting the second first member carrier by a preset step, each step of shifting needs to record the uplink time slot overlapping amount between the second first member carrier and the second member carrier and the first member carrier shifted by different preferred offsets, and select the preferred offset of the second first member carrier capable of minimizing the uplink time slot overlapping amount among the second first member carrier, the first member carrier and the second member carrier. In addition, it is also desirable to select some or all of the preferred offsets from the two or more preferred offsets for the first component carrier to continue the comparison with the number of uplink overlapping timeslots for the third first component carrier, because only some or only one of the preferred offsets for the first component carrier may minimize the number of uplink timeslots overlaps between the second first component carrier, the first component carrier, and the second component carrier. And so on, determining a preferred offset of the third first component carrier that can minimize the number of uplink time slot overlaps between the second first component carrier, the first component carrier, the third first component carrier, and the second component carrier, and screening the preferred offset of the second first component carrier and the preferred offset of the first component carrier.

The foregoing is one of the adaptive time-shifting algorithms provided in the embodiments of the present invention, which can quickly calculate one or more target offset manners that can minimize uplink time slot overlapping between the component carriers.

Of course, other adaptive timing algorithms may be used in the embodiment of the present invention, for example, one member carrier (i.e., the second member carrier) may be selected to be fixed and not shifted, and the first member carriers may be ordered, and sequentially shifted, where each time the first member carrier that is ordered is shifted by one step, the adjacent and ordered first member carrier needs to be shifted by one frame period of the first member carrier that is ordered and that is located next to the first member carrier according to a preset step. And recording the uplink time slot overlapping quantity among all the member carriers after each first member carrier is shifted by one step, and selecting an offset mode with the minimum uplink time slot overlapping quantity from the uplink time slot overlapping quantity as a target offset mode.

For example, referring to fig. 7, when there are only two component carriers in carrier aggregation, if the frame period of the component carrier 1 is greater than or equal to the frame period of the component carrier 2, the component carrier 2 with a shorter frame period is selected as the target component carrier to perform forward or backward offset, otherwise, the component carrier 1 is biased.

In the embodiment of the invention, the member carrier with long frame period is selected as the carrier which is fixed and not offset, and the offset is implemented on the member carrier with shorter frame period, so that the speed of calculating the target member carrier needing offset and the offset required by each target member carrier by using the self-adaptive time-staggered algorithm can be improved.

Of course, the second component carrier may not be the component carrier with the longest frame period among the component carriers. When shifting the first component carriers in sequence according to the preset step length, the first component carrier to be shifted currently may be selected randomly from the first component carriers which are not shifted currently and for which the preferred offset is determined, instead of the frame period length sequence of the first component carriers.

Acquiring a subcarrier interval of each member carrier;

and selecting the time slot (slot) length of the member carrier with the largest subcarrier interval as a preset step length of the offset.

In the embodiment of the invention, the time slot length of the member carrier with the largest subcarrier spacing in each member carrier is selected as the step length in the self-adaptive time-shifting algorithm, namely the shortest time slot is used as the step length in the self-adaptive time-shifting algorithm, so that the speed of calculating the target member carrier needing to be shifted and the offset needed by each target member carrier by using the self-adaptive time-shifting algorithm can be improved.

For example, referring to fig. 7, when there are only two component carriers in carrier aggregation, the size of a subcarrier spacing (SCS) of the component carrier is determined, if the subcarrier spacing of the component carrier 1 is smaller than or equal to the subcarrier spacing of the component carrier 2, one slot (slot) of the component carrier 2 is used as a step size for shifting, otherwise, one slot of the component carrier 1 is used as a step size for shifting (i.e., when SCS of the component carrier is different, the two carrier slot lengths are inconsistent, and in principle, a shorter slot is used as a step size for shifting).

For example, referring to fig. 7, when there are only two component carriers in carrier aggregation, if the frame period of the component carrier 1 is greater than or equal to the frame period of the component carrier 2 and the subcarrier interval of the component carrier 1 is less than or equal to the subcarrier interval of the component carrier 2, then the component carrier 2 is circularly shifted and checked with one slot as a step length, and the overlapping number and offset of the uplink slots of the two component carriers after each shift are recorded until one frame period of the component carrier 2 is circularly shifted, and the optimal offset for minimizing the overlapping of the uplink slots between the component carrier 1 and the component carrier 2 is output, so that the optimal offset for minimizing the overlapping of the uplink slots between the component carrier 1 and the component carrier 2 is not necessarily one or may be multiple.

In other optional embodiments, each time the shift check is performed, it is determined whether the minimum number of uplink time slot overlaps (0 represents no overlap) between the component carrier 2 and the component carrier 1 is satisfied, if the shift is not satisfied, the shift is continued, and the component carrier 2 is shifted by one frame period at most in a cyclic manner until the condition is satisfied, and the corresponding optimal offset is output.

The method for cross-band carrier aggregation is described below by taking 2.6GHz carrier and 4.9GHz carrier as examples.

Example 1,2.6ghz carrier is 5ms frame period, frame structure DDDSUUDDDD. The 4.9GHz carrier has 2 frame structures, one is a 2.5ms frame period, the frame structure is DSUUU, the other is a 2.5ms double period, and the frame structure is DDDSUDDSUU. When frame heads are aligned, uplink time slot overlapping occurs, and the frame head offset is implemented on the 4.9GHz 2 frame structures through the scheme, so that the effect of completely staggering the uplink time slots can be realized:

1. please refer to fig. 8,4.9ghz (2.5 ms) frame structure: the frame header is shifted forward by 1slot, i.e. inter-and-atm offset = -0.5ms:

2. referring to fig. 9,4.9ghz (2.5 ms double) frame structure: the total of 5 adjustment schemes can respectively offset forward by 1slot, forward by 2 slots, backward by 3 slots and backward by 4 slots, and can realize uplink complete staggering, and the offset amounts of interband ATimatoffset are-0.5 ms, -1ms, +1ms, +1.5ms and +2ms respectively.

In an optional embodiment, the step of determining the offset of the target member carrier according to the frame structure information and the frame header position related information of each member carrier includes:

In the embodiment of the invention, in order to prevent the same frequency interference caused by different offset carriers or different offset between different base stations, offset interaction and negotiation can be performed through an X2 interface between the base stations, so as to determine a unified offset frequency band and a final offset.

In another optional embodiment, the step of determining the offset of the target member carrier according to the frame structure information and the frame header position related information of each member carrier to update the frame header position of the target member carrier includes:

In the embodiment of the invention, in order to prevent the same frequency interference caused by different offset carriers or different offset amounts among different base stations, a network manager can determine a unified offset frequency band and a final offset amount.

Referring to fig. 10, fig. 10 is a schematic structural diagram of a base station according to an embodiment of the present invention, where the base station 100 includes:

a judging module 101, configured to determine whether uplink time slot overlap exists between component carriers according to frame structure information and frame header position related information of each component carrier;

a determining module 102, configured to determine an offset of a target member carrier according to frame structure information and frame header position related information of each member carrier if there is uplink timeslot overlapping, so as to update a frame header position of the target member carrier;

Optionally, the base station 100 further includes:

Optionally, the determining module 102 includes:

the updating module comprises:

The embodiments of the present invention are product embodiments corresponding to the above method embodiments, so they will not be described herein, and reference will be made in detail to the above embodiments.

Referring to fig. 11, fig. 11 is a schematic structural diagram of a base station according to an embodiment of the present invention, where the base station 110 includes: a transceiver 111 and a processor 112;

the processor 112 is configured to determine whether uplink time slot overlap exists between the component carriers according to frame structure information and frame header position related information of each component carrier;

the processor 112 is further configured to determine an offset of a target member carrier according to the frame structure information and the frame header position related information of each member carrier if there is uplink timeslot overlapping, so as to update the frame header position of the target member carrier;

Optionally, the transceiver 111 is configured to send the offset of the target member carrier to a network manager, so as to update the frame header position of the target member carrier, and update the frame header positions of carriers of other base stations that are the same as the target member carrier.

Optionally, the transceiver 111 is configured to obtain, when the member carrier includes the member carrier of the base station and a member carrier of a different station, frame structure information and frame header position related information of the member carrier of the different station through an X2 interface or a southbound interface with a network manager.

Optionally, the processor 112 is configured to shift, for each first component carrier in sequence, one frame period of the first component carrier according to a preset step length, where the total number of the component carriers is N, and the first component carrier is N-1 of the component carriers;

the processor 112 is further configured to determine, for each of the first component carriers, an offset with a smallest uplink time slot overlap with a third component carrier as a preferred offset of the first component carrier; the third member carrier comprises a second member carrier and a member carrier of the first member carrier, wherein the member carrier has determined a preferred offset and is shifted according to the determined preferred offset, and the second member carrier is another member carrier of the N member carriers except the first member carrier;

The processor 112 is further configured to determine, after determining the preferred offset of the last first component carrier, one or more offset manners capable of minimizing uplink timeslot overlapping between the component carriers as target offset manners, where the component carriers and/or offsets to be shifted in each offset manner are different, and the component carriers to be shifted in the target offset manner are the target component carriers.

Optionally, the processor 112 is configured to shift the first component carriers sequentially according to the preset step length in order of a frame period of the first component carrier from short to long or from long to short, and the second component carrier is a component carrier with a longest frame period in the component carriers.

Optionally, the processor 112 is configured to obtain a subcarrier spacing of each of the component carriers;

the processor 112 is further configured to select a time slot length of the component carrier with the largest subcarrier spacing as a preset step length of the offset.

Optionally, the processor 112 is configured to determine, according to the frame structure information and the frame header position related information of each of the component carriers, one or more target offset manners capable of minimizing uplink time slot overlapping between the component carriers, where each of the target offset manners is different in the component carriers and/or offsets to be shifted;

The processor 112 is further configured to negotiate with other base stations to determine that the member carrier to be offset by the target offset manner is the target member carrier, and that the offset of the member carrier to be offset is the offset of the target member carrier.

the transceiver 111 is configured to send the one or more target offset manners capable of minimizing uplink time slot overlapping between the member carriers to the network manager;

the transceiver 111 is further configured to receive frame header position configuration information sent by the network manager, where the frame header position configuration information is used to configure the base station to offset the member carrier and the corresponding offset according to a first target offset mode, where the first target offset mode is a target offset mode that is the same as the target offset modes reported by other base stations by the base station.

Referring to fig. 12, fig. 12 is a schematic structural diagram of a base station according to an embodiment of the present invention, where the base station 120 includes a processor 121, a memory 122, and a program stored in the memory 122 and executable on the processor 121; the processor 121, when executing the program, implements the following steps:

Optionally, the processor 121 may further implement the following steps when executing the program:

after the step of determining the offset of the target member carrier according to the frame structure information and the frame header position related information of each member carrier, the method further includes:

the step of determining whether uplink time slot overlap exists between the member carriers according to the frame structure information and the frame head position related information of each member carrier further comprises the steps of:

the step of determining the offset of the target member carrier according to the frame structure information and the frame head position related information of each member carrier includes:

the step of shifting one frame period of the first component carrier according to a preset step length for each first component carrier in turn includes:

acquiring a subcarrier interval of each member carrier;

the step of determining the offset of the target member carrier according to the frame structure information and the frame head position related information of each member carrier so as to update the frame head position of the target member carrier comprises the following steps:

The specific working process of the embodiment of the present invention is identical to that of the above-mentioned method embodiment, so that the detailed description thereof will be omitted herein, and reference is made to the description of the method steps in the above-mentioned embodiment.

The embodiment of the present invention also provides a readable storage medium, on which a program is stored, which when executed by a processor, implements the steps in the method of any of the above-described method embodiments for cross-band carrier aggregation. For details, reference is made to the description of the method steps in the corresponding embodiments above.

The base station in the embodiment of the present invention may be a base station (Base Transceiver Station, BTS) in global mobile communications (Global System of Mobile communication, GSM for short) or code division multiple access (Code Division Multiple Access, CDMA for short), a base station (NodeB, NB for short) in wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA for short), an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, a relay station or access point, or a base station in a future 5G network, etc., which are not limited herein.

The above-described readable storage media, including both permanent and non-permanent, removable and non-removable media, may be implemented in any method or technology for information storage. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, read only compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape storage or other magnetic storage devices, or any other non-transmission medium which can be used to store information that can be accessed by a computing device.

While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.

Claims

1. A method for cross-band carrier aggregation applied to a base station, comprising:

2. The method of claim 1, wherein after the step of determining the offset of the target component carrier according to the frame structure information and the frame header position related information of each component carrier, further comprises:

3. The method according to claim 1, wherein the member carriers include member carriers of the base station and member carriers of different stations, and before the step of determining whether there is uplink time slot overlap between the member carriers according to frame structure information and frame header position related information of each member carrier, further includes:

Acquiring frame structure information and frame head position related information of the member carrier of the different station through an X2 interface or a southbound interface between the member carrier and a network manager; the different station is a base station adjacent to the base station or a base station belonging to the same area with the base station.

4. The method of claim 1, wherein the step of determining the offset of the target component carrier according to the frame structure information and the frame header position related information of each of the component carriers comprises:

5. The method of claim 4, wherein the step of shifting one frame period of the first component carrier by a preset step size for each first component carrier in turn comprises:

6. The method as claimed in claim 1 or 4, wherein the step of determining the offset of the target component carrier according to the frame structure information and the frame header position related information of each of the component carriers comprises:

acquiring a subcarrier interval of each member carrier;

7. The method of claim 1, wherein the step of determining the offset of the target component carrier according to the frame structure information and the frame header position related information of each of the component carriers comprises:

8. The method of claim 2, wherein the step of determining the offset of the target member carrier according to the frame structure information and the frame header position related information of each member carrier to update the frame header position of the target member carrier comprises:

9. A base station, comprising:

10. A base station, comprising: a transceiver and a processor;

11. A base station comprising a memory, a processor and a program stored on the memory and executable on the processor; the method according to any of claims 1 to 8, characterized in that the steps in the method of cross-band carrier aggregation are implemented by the processor when executing the program.

12. A readable storage medium having stored thereon a program, which when executed by a processor, implements the steps of the method of cross-band carrier aggregation as claimed in any one of claims 1 to 8.