CN113852987A

CN113852987A - Carrier aggregation-based end-to-end time delay enhancement method and communication service equipment

Info

Publication number: CN113852987A
Application number: CN202010596055.9A
Authority: CN
Inventors: 唐枫
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2021-12-28

Abstract

The application relates to but is not limited to an end-to-end time delay enhancement method based on carrier aggregation and communication service equipment, one or more auxiliary carriers are configured and carrier aggregation is carried out on the auxiliary carriers and a main carrier when a QoS parameter of user equipment does not meet a preset time delay requirement, the auxiliary carriers cooperate with the main carrier to carry uplink data and/or downlink data in a carrier aggregation mode, the uplink and downlink end-to-end time delay of an eMBB service is reduced to a certain extent, and the time delay enhancement effect is obvious compared with that of a single carrier mode. In addition, the main carrier and the auxiliary carrier after carrier aggregation are used for shunting and scheduling uplink data and/or downlink data, so that the communication delay performance between communication service equipment and user equipment can be enhanced through shunting and scheduling.

Description

Carrier aggregation-based end-to-end time delay enhancement method and communication service equipment

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to but not limited to an end-to-end delay enhancing method based on carrier aggregation and communication service equipment.

Background

With the continuous increase of end users, the user traffic and data throughput are continuously increased, and higher requirements are put on the communication rate. In the case of a frame structure of a 1ms subframe of 4G LTE, the actual delay reaches tens of milliseconds, even hundreds of milliseconds, and therefore, reducing the delay and reducing the duration of the subframe are necessary options. However, to meet the requirements of the New generation Mobile communication service, the delay of 5G New air interface (5G Radio, abbreviated as 5G NR) must be much smaller than that of 4G LTE, for example, the Ultra-reliable and Low Latency Communications (URLLC) service requires that the delay of DL and UL is 0.5ms, and the enhanced Mobile broadband (eMBB) service requires that the delay of DL and UL is 4 ms.

Currently, the 5G NR can reduce the user plane latency by some flexible means. The 5G NR air interface physical layer also uses Orthogonal Frequency Division Multiplexing (OFDM) and uses a large number of narrow-band subcarriers, which are closely arranged in the Frequency domain, and each subcarrier is formed by a simple rectangular pulse. Compared with the 4G LTE, the core of the change of the 5G NR wireless frame is the change of the subcarrier interval and the modulation symbol time, so that the time of a single symbol is changed, the flexible allocation of air interface resources is achieved, and the processing delay is shortened. Compared with the symbol length of a carrier interval and a time domain, the 5G NR and the 4G LTE have fundamental differences, the most remarkable difference is that the 5G NR adopts a plurality of different carrier interval types, the 4G LTE only uses a single carrier interval of 15kHz, the time of a single symbol is shortened along with the lengthening of the subcarrier interval, the fact that more symbols are contained in one subframe within 1ms is meant, and the shortening of the time of the single symbol is also meant to shorten the processing time of single data, which is beneficial for the shortening of the overall time delay of the 5G NR. In this case, the larger the subcarrier interval is, the shorter the corresponding slot length (i.e., slot length) is, which is more favorable for the implementation of low delay; conversely, the shorter the slot length is, the greater the resource overhead is, and the more disadvantageous the implementation of the eMBB large capacity requirement is.

In the diversified application scenario of the 5G NR, multi-connection and diversified services need to be oriented, which means that deployment is more flexible and classified management is needed, and network switching is just such a networking-on-demand manner, spectrum resource sharing under network switching is a basic requirement, if coexistence of the eMBB and low delay is achieved, mutual influence is reduced, and improving spectrum resource utilization rate is one of the challenges that the 5G system inevitably faces. Therefore, it is necessary to introduce a carrier aggregation technology into the 5G NR system, where carrier aggregation uses multiple continuous or discontinuous frequency spectrums in an aggregation manner, so as to meet the requirement of mobile communication for a large bandwidth, and improve the utilization rate of scattered frequency spectrums in wireless frequency spectrum resources.

Disclosure of Invention

The embodiment of the invention provides an end-to-end time delay enhancing method and device based on carrier aggregation, and mainly solves the technical problems of how to reduce the data transmission time delay of a user plane in an eMB service, improve the time delay enhancing service quality of end-to-end communication, and realize the coexistence of the eMB service and the low time delay service.

To solve the foregoing technical problem, an embodiment of the present invention provides an end-to-end delay enhancing method based on carrier aggregation, including: accessing user equipment into a main carrier and carrying out wireless network communication with the user equipment, wherein the main carrier is used for bearing uplink data and/or downlink data; acquiring a QoS parameter of the user equipment according to the main carrier, wherein the QoS parameter is used for expressing the communication service quality of a wireless network aiming at uplink time delay and/or downlink time delay; when the QoS parameter does not meet the preset time delay requirement, configuring one or more auxiliary carriers and carrying out carrier aggregation with the main carrier; and carrying out shunting scheduling on the uplink data and/or the downlink data by using the main carrier and the auxiliary carrier after carrier aggregation, and enhancing the time delay performance of communication with the user equipment through shunting scheduling.

The accessing the user equipment to the main carrier and performing wireless network communication with the user equipment includes: responding to a request of a user device for accessing a wireless network, and establishing a communication channel between the user device and the user device for communication connection; configuring uplink and downlink proportion of a main carrier for the communication channel, and transmitting uplink data and/or downlink data by using the main carrier; the uplink data is data sent by the user equipment to a wireless network, and the downlink data is data received by the user equipment from the wireless network.

Configuring uplink and downlink proportion of a main carrier for the communication channel, and transmitting uplink data and/or downlink data by using the main carrier, wherein the method comprises the following steps: configuring the primary carrier as a TDD carrier; each subframe of the TDD carrier corresponding to the main carrier is provided with at least one data transmission air interface, where the data transmission air interface is a downlink slot, a special slot, or an uplink slot; dividing the uplink data into equal parts according to the arrival time of the uplink data, and transmitting the equal parts in the uplink data by using each uplink slot in the TDD carrier corresponding to the main carrier; or, equally dividing the downlink data according to the arrival time of the downlink data, and transmitting the equally divided portions in the uplink data by using each downlink slot and a special slot in the TDD carrier corresponding to the main carrier.

Acquiring the QoS parameter of the user equipment according to the main carrier, wherein the QoS parameter comprises the following steps: and detecting data borne by each uplink slot in the TDD carrier corresponding to the main carrier, analyzing the detected data and acquiring the QoS parameters of the user equipment from the detected data.

When the QoS parameter does not meet a preset delay requirement, configuring one or more secondary carriers and performing carrier aggregation with the primary carrier, including: comparing the QoS parameter with a preset time delay requirement, and determining that the time delay of the main carrier is increased when the QoS parameter is judged not to meet the time delay requirement; screening one or more auxiliary carriers from a preset auxiliary carrier list, configuring the uplink and downlink proportion of each auxiliary carrier, and adding and activating each auxiliary carrier through carrier aggregation; the secondary carrier is used for cooperating with the main carrier to participate in data transmission after being activated.

Screening one or more auxiliary carriers from a preset auxiliary carrier list, configuring the uplink-downlink ratio of each auxiliary carrier, and adding and activating each auxiliary carrier through carrier aggregation, wherein the method comprises the following steps: screening a preset auxiliary carrier list according to the time delay requirement, and selecting one or more auxiliary carriers with adaptive carrier bandwidth, uplink and downlink proportion, channel conditions and congestion states; when the main carrier bears the uplink data, configuring the auxiliary carrier into a TDD carrier or an FDD carrier; when the main carrier bears the downlink data, configuring the auxiliary carrier into a TDD carrier; each subframe of the TDD carrier corresponding to the secondary carrier is provided with at least one data transmission air interface, and each subframe of the FDD carrier corresponding to the secondary carrier is provided with at least one uplink slot; and adding each selected auxiliary carrier to the main carrier, and carrying the uplink data and/or the downlink data together with the main carrier after activation.

Screening a preset auxiliary carrier list according to the time delay requirement, and selecting one or more auxiliary carriers with adaptive carrier bandwidth, uplink and downlink proportion, channel conditions and congestion states, wherein the auxiliary carriers comprise: traversing a preset auxiliary carrier list according to the requirement of the time delay requirement, wherein the auxiliary carrier list comprises a plurality of TDD carriers and FDD carriers with different uplink and downlink proportions; if the carrier bandwidth, the uplink and downlink ratio, the channel condition and the congestion state of any one auxiliary carrier in the auxiliary carrier list are judged to meet the time delay requirement, the auxiliary carrier is selected from the auxiliary carrier; if the carrier bandwidth, the uplink and downlink ratio, the channel condition and the congestion state of each auxiliary carrier in the auxiliary carrier list are judged not to reach the delay requirement, a plurality of auxiliary carriers close to the delay condition are sequentially selected from the auxiliary carriers until the selected auxiliary carriers reach the delay requirement after being matched.

The method for performing the shunting scheduling of the uplink data and/or the downlink data by using the main carrier and the auxiliary carrier after carrier aggregation comprises the following steps: performing frame header offset processing on the secondary carrier after carrier aggregation to enable the same data transmission air interfaces of the main carrier and the secondary carrier after carrier aggregation to be staggered; when the uplink data is transmitted by using a main carrier and an auxiliary carrier after carrier aggregation, dividing the uplink data into equal parts according to the arrival time of the uplink data, and respectively transmitting equal parts close to each uplink slot in time in the uplink data by using each uplink slot in a TDD carrier corresponding to the main carrier and each uplink slot in a TDD carrier or an FDD carrier corresponding to the auxiliary carrier; when the main carrier and the auxiliary carrier after carrier aggregation are used for transmitting the downlink data, the downlink data are divided into equal parts according to the arrival time of the downlink data, and the equal parts close to each downlink slot or each special slot in time in the downlink data are transmitted by using each downlink slot and special slot in the TDD carrier corresponding to the main carrier and each downlink slot and special slot in the TDD carrier corresponding to the auxiliary carrier respectively.

Performing frame header offset processing on the secondary carrier after carrier aggregation to make the same data transmission air interfaces of the primary carrier and the secondary carrier after carrier aggregation staggered with each other, comprising: judging whether the auxiliary carrier after carrier aggregation is a TDD carrier or an FDD carrier, if so, performing frame header offset processing on the TDD carrier, and if not, performing frame header offset processing; when performing frame header offset processing on the TDD carrier corresponding to the secondary carrier, if the uplink data is carried, staggering each uplink slot in the TDD carrier corresponding to the primary carrier and each uplink slot in the TDD carrier corresponding to the secondary carrier; and if the downlink data is carried, staggering each downlink slot and special slot in the TDD carrier corresponding to the main carrier and each downlink slot and special slot in the TDD carrier corresponding to the auxiliary carrier.

An embodiment of the present invention further provides a communication service device with enhanced time delay, including: the system comprises a physical access module, a wireless network module and a data transmission module, wherein the physical access module is used for accessing user equipment into a main carrier and carrying out wireless network communication with the user equipment, and the main carrier is used for bearing uplink data and/or downlink data; the first control module is connected with the physical access module and used for acquiring the QoS parameters of the user equipment according to the main carrier, and configuring one or more auxiliary carriers and carrying out carrier aggregation with the main carrier when the QoS parameters do not meet the preset time delay requirement; the QoS parameter is used for representing the communication service quality of the wireless network aiming at the uplink time delay and/or the downlink time delay; and the second control module is connected with the first control module and is used for carrying out shunting scheduling on the uplink data and/or the downlink data by utilizing the main carrier and the auxiliary carrier after carrier aggregation, and enhancing the time delay performance of communication with the user equipment through shunting scheduling.

The physical access module is arranged at a communication server and establishes a communication channel with the user equipment for communication connection when responding to a request of the user equipment for accessing a wireless network; the physical access module configures the uplink and downlink proportion of a main carrier for the communication channel, and transmits uplink data and/or downlink data by using the main carrier; the uplink data is data sent by the user equipment to a wireless network, and the downlink data is data received by the user equipment from the wireless network.

The first control module detects the main carrier through the physical access module and obtains a QoS parameter of the user equipment, compares the QoS parameter with a preset time delay requirement, and determines that the time delay of the main carrier is increased when the QoS parameter does not meet the time delay requirement; the first control module screens one or more auxiliary carriers from a preset auxiliary carrier list, controls the physical access module to configure the uplink and downlink proportion of each auxiliary carrier, and adds and activates each auxiliary carrier through carrier aggregation; the auxiliary carrier is used for cooperating with the main carrier to participate in data transmission after being activated; the main carrier is configured as a TDD carrier, at least one data transmission air interface is arranged in each subframe of the TDD carrier corresponding to the main carrier, and the data transmission air interface is a downlink slot, a special slot or an uplink slot; the auxiliary carrier is configured to be a TDD carrier or an FDD carrier, at least one data transmission air interface is arranged in each subframe of the TDD carrier corresponding to the auxiliary carrier, and at least one uplink slot is arranged in each subframe of the FDD carrier corresponding to the auxiliary carrier.

The second control module performs frame header offset processing on the secondary carrier after carrier aggregation, so that the same data transmission air interfaces of the main carrier and the secondary carrier after carrier aggregation are staggered; when the second control module uses the main carrier and the auxiliary carrier after carrier aggregation to transmit the uplink data, the second control module divides the uplink data into equal parts according to the arrival time of the uplink data, and respectively transmits equal parts close to each uplink slot in time in the uplink data by using each uplink slot in the TDD carrier corresponding to the main carrier and each uplink slot in the TDD carrier or the FDD carrier corresponding to the auxiliary carrier; and when the second control module utilizes the main carrier and the auxiliary carrier after carrier aggregation to transmit the downlink data, equally dividing the downlink data according to the arrival time of the downlink data, and respectively transmitting equal parts close to each downlink slot or each special slot in time in the downlink data by using each downlink slot and special slot in the TDD carrier corresponding to the main carrier and each downlink slot and special slot in the TDD carrier corresponding to the auxiliary carrier.

Embodiments of the present invention also provide a computer-readable storage medium, which stores one or more computer programs that can be executed by one or more processors to implement the end-to-end delay enhancement method as described in the above first aspect.

The beneficial effect of this application is:

according to the end-to-end time delay enhancing method based on carrier aggregation and the communication service equipment provided by the embodiment of the invention, one or more auxiliary carriers are configured and carrier aggregation is carried out with the main carrier when the QoS parameter of the user equipment does not meet the preset time delay requirement, the auxiliary carrier is enabled to cooperate with the main carrier to carry uplink data and/or downlink data in a carrier aggregation mode, the uplink and downlink end-to-end time delay of an eMBB service is reduced to a certain extent, and the time delay enhancing effect is obvious compared with that of a single carrier mode. In addition, the main carrier and the auxiliary carrier after carrier aggregation are used for shunting and scheduling uplink data and/or downlink data, so that the communication delay performance between communication service equipment and user equipment can be enhanced through shunting and scheduling.

Additional features and corresponding advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a flowchart of a carrier aggregation-based end-to-end delay enhancing method according to a first embodiment of the present invention;

fig. 2 is a flowchart of a ue accessing a primary carrier according to a first embodiment of the present invention;

fig. 3 is a flowchart of configuring one or more secondary carriers and performing carrier aggregation according to a first embodiment of the present invention;

fig. 4 is a flowchart of performing uplink and downlink data offloading scheduling by using a primary carrier and a secondary carrier after carrier aggregation according to a first embodiment of the present invention;

fig. 5 is a schematic diagram of uplink data transmission using a primary carrier;

fig. 6 is a schematic diagram illustrating a principle of downlink data transmission using a primary carrier;

fig. 7 is a schematic diagram illustrating a principle of uplink data transmission using carrier aggregation;

fig. 8 is a second schematic diagram illustrating the principle of uplink data transmission by carrier aggregation;

fig. 9 is a third schematic diagram illustrating the principle of uplink data transmission by carrier aggregation;

fig. 10 is a schematic diagram illustrating a principle of downlink data transmission using carrier aggregation;

fig. 11 is a schematic structural diagram of a communication service apparatus according to a second embodiment of the present invention;

fig. 12 is a schematic diagram illustrating a principle of downlink data offloading scheduling performed by a communication service device according to a second embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The first embodiment,

Referring to fig. 1, the present embodiment discloses an end-to-end delay enhancing method based on carrier aggregation, which is mainly applied to a communication service device and plays a role of enhancing a delay for communication between the communication service device and a user equipment.

In this embodiment, a Communication service device (CS) may be a wireless Communication service component on a base station; the User Equipment (UE) may be a mobile electronic terminal device supporting 5G communication, such as a mobile phone, a notebook computer, a tablet computer, and a wearable device of a User.

In this embodiment, the end-to-end delay enhancement method may include steps S100-S400, which are described below separately.

Step S100, accessing a user equipment to a primary carrier and performing wireless network communication with the user equipment, where the primary carrier is used for carrying uplink data and/or downlink data.

It should be noted that two concepts are involved in CA, one is a Primary Carrier Component (PCC) for mainly carrying uplink and downlink data during communication; and another secondary carrier (SCC) for cooperating with the PCC and assisting in carrying uplink and downlink data during communication. The uplink and downlink data here includes uplink data and/or downlink data.

Step S200, obtaining QoS parameter of user equipment according to the main carrier. The QoS parameter is used to indicate the communication service quality of the wireless network for the uplink delay and/or the downlink delay.

It should be noted that, for mobile communication services, an important indicator is end-to-end delay, that is, for both ends of the transceiver that has established a connection, the delay between the generation of a data packet from the transmitting end and the correct reception of the data packet to the receiving end. According to different service models, the end-to-end delay can be divided into one-way delay and return delay, wherein the one-way delay refers to the delay of a data packet from a transmitting end to another receiving end through a wireless network, and the return delay refers to the delay of the data packet from the transmitting end to a target server for receiving the data packet and returning the corresponding data packet until the transmitting end receives a response data packet correctly. Here, the QoS parameter indicates the communication service quality, which refers to the one-way delay of data transmission, i.e. the uplink delay and/or the downlink delay.

It should be noted that Quality of Service (QoS) refers to a network that can provide better Service capability for specified network communication by using various basic technologies, and is a security mechanism of the network, which is a technology for solving the problems of network delay and congestion. Under normal circumstances, if the network is only used for a specific application system without time limitation, no QoS is required, such as Web application, or E-mail settings, etc. But is essential for critical and multimedia applications, and QoS ensures that important traffic is not delayed or dropped when the network is overloaded or congested, while ensuring efficient operation of the network.

And step S300, when the QoS parameter does not meet the preset time delay requirement, configuring one or more auxiliary carriers and carrying out carrier aggregation with the main carrier.

In the process of a 5G NR network, a 5G communication protocol has a definite requirement on time delay, standards of uplink time delay and downlink time delay are respectively specified, and an operator needs to construct a communication service capability conforming to the protocol standard.

It should be noted that, the Carrier Aggregation (CA) technology can cooperate the primary carrier and the secondary carrier to carry uplink and downlink data, improve the bandwidth and response speed of the uplink and downlink data, and greatly help to reduce the user plane delay of the eMBB system. The CA can aggregate a plurality of independent cells covered and overlapped by signals, and User Equipment (UE) configured with the CA is connected with a primary carrier PCC and a secondary carrier SCC; the PCC, as a cell to which the UE initially accesses, plays a role in taking charge of communication with Radio Resource Control (RRC for short) between the UE; SCC needs to be added during RRC reconfiguration, which may provide additional radio resources; CA is a characteristic of a UE, and different UEs may have different PCC and SCC combinations serving them.

It should be noted that after acquiring the Qos parameter of the ue and determining the delay requirement of the ue, it is determined whether a Carrier Aggregation (CA) technique needs to be enabled according to the delay requirement, and the secondary carrier is added and activated after the carrier aggregation is enabled, and the end-to-end delay for the ue can be reduced through real-time decision and flexible offloading policy, so that the low-delay requirement of the eMBB service can be effectively guaranteed, the problem of contradiction between the low-delay and the eMBB service on the subcarrier spacing requirement is solved, and the method has an important meaning for coexistence of the eMBB service and the low-delay service in the 5G NR system.

And step S400, carrying out shunting scheduling on uplink data and/or downlink data by using the main carrier and the auxiliary carrier after carrier aggregation, and enhancing the time delay performance of communication with the user equipment through shunting scheduling.

It should be noted that, after the CA is established, the main carrier and the auxiliary carrier cooperate to distribute uplink and downlink data, and at this time, a flexible distribution strategy may be adopted to distribute the uplink and downlink data to the optimal carrier to complete air interface transmission, so as to achieve the purpose of delay enhancement. In the uplink data offloading strategy, it is necessary to determine which carrier the uplink data is distributed to can be scheduled and transmitted over the air interface most quickly, and select the fastest component carrier path to transmit the data. In the downlink data offloading strategy, it is necessary to determine which carrier the downlink data is distributed to can be scheduled and transmitted at the air interface most quickly, and select the fastest component carrier path to transmit the data.

It should be noted that the primary carrier PCC is a data aggregation end, uplink and downlink data need to be shunted from the primary carrier to each secondary carrier SCC, and the shunting policy needs to consider the fast distribution capability of each member carrier, and determine in real time which carrier the current data can obtain the air interface sending opportunity fastest, so as to shunt the data to the corresponding carrier, thereby achieving the best end-to-end delay performance.

In this embodiment, referring to fig. 2, the step S100 described above mainly involves accessing the ue to the primary carrier and performing wireless network communication with the ue, and may specifically include steps S110 to S120, which are respectively described as follows.

Step S110, in response to a request for accessing the wireless network from the user equipment, establishing a communication channel with the user equipment for performing a communication connection.

It should be noted that the communication channel between the communication service device and the user equipment is a data transmission path, and has characteristics of radio propagation, random mobility, delay spread, and frequency domain spread.

Step S120, configuring uplink and downlink ratios of the main carrier for the communication channel, and transmitting uplink data and/or downlink data by using the main carrier. The uplink data is data sent by the user equipment to the wireless network, and the downlink data is data received by the user equipment from the wireless network.

In a specific embodiment, the primary carrier may be configured as a TDD carrier, and at least one data transmission air interface is arranged in each subframe of the TDD carrier corresponding to the primary carrier, where the data transmission air interface is a downlink slot, a special slot, or an uplink slot; dividing the uplink data into equal parts according to the arrival time of the uplink data, and transmitting the equal parts in the uplink data by utilizing each uplink slot in the TDD carrier corresponding to the main carrier; or, equally dividing the downlink data according to the arrival time of the downlink data, and transmitting equally divided parts in the uplink data by using each downlink slot and the special slot in the TDD carrier corresponding to the main carrier.

In 5 th generation mobile communication systems, 5 GNRs continue to use 1ms subframes, but a subframe may contain multiple slots (i.e., slots). As shown in table 1 below, when the subcarrier spacing (SCS for short) is 15kHz, 1 5G NR subframe still contains 14 OFDM symbols and is the same as 4G LTE, but only 1 slot in 1 subframe instead of 2 slots in LTE; when the SCS is 30kHz, there are 28 OFDM symbols in 1 5G NR subframe, which is equivalent to 2 slots; when the SCS is 60kHz, there are 56 OFDM symbols in 1 5G NR subframe, which is equivalent to 4 slots; when the SCS is 120kHz, there are 112 OFDM symbols in 1 5G NR subframe, which is equivalent to 8 slots; when the SCS is 240kHz, there are 224 OFDM symbols in 1 5G NR subframe, which is equivalent to 16 slots. In this way, although the duration of the 5G NR subframe is still 1ms, when a larger subcarrier interval is selected, the duration of the slot is shortened, and the duration of each OFDM symbol is also shortened, so that the goal of reducing the delay can be achieved on the premise that the slot is a data scheduling unit.

TABLE 15G relationships between NR subcarrier spacing, slots, frames, subframes

Index	Subcarrier spacing	Time/slot	Number of symbols/slot	slot number/frame	slot number/subframe
						0	15kHz	1ms	14	10	1
1	30kHz	0.5ms	14	20	2
						2	60kHz	0.25ms	14	40	4
3	120kHz	0.125ms	14	80	8
						4	240kHz	0.0625ms	14	160	16

In addition, in 5G NR, a more efficient mechanism can be introduced to achieve low latency, i.e. to allow transmission one slot at a time, i.e. so-called "mini-slot" transmission mechanism. The transmission mechanism can also be used for changing the sequence of a data transmission queue, so that the mini-slot transmission data is immediately inserted in front of the allocated conventional slot transmission data sent to a certain terminal, and extremely low time delay is obtained.

To assist understanding, the transmission process of uplink data and/or downlink data using the primary carrier will be described herein.

Referring to fig. 5, for a TDD carrier corresponding to a main carrier, a subcarrier spacing (SCS) is 30kHz, a slot length (slot) is 0.5ms, and when an uplink and a downlink ratio are DDDSUDDDSU, each character in the DDDSUDDDSU represents a data transmission air interface, and D, S, U represents a downlink slot, a special slot, or an uplink slot, respectively. The process of transmitting each equal part of the uplink data by using each uplink slot in the TDD carrier corresponding to the primary carrier can be described in detail with reference to the schematic content in fig. 5. The uplink data is divided into 10 equal parts according to the arrival time of the uplink data, and the 10 equal parts are respectively equal parts 0 to 9, and since only the uplink slot represented by U in the uplink and downlink ratio of the TDD carrier can carry the equal part corresponding to the uplink data, the equal parts 0 to 8 can be allocated to the first uplink slot for uplink transmission, and the equal parts 9 are allocated to the second uplink slot for uplink transmission. Of course, the number of equal parts allocated to each uplink slot may be randomly adjusted, and is not strictly limited herein.

Referring to fig. 6, for a TDD carrier corresponding to a main carrier, a subcarrier spacing (SCS) is 30kHz, a slot length (slot) is 0.5ms, and when an uplink and a downlink ratio are DDDSUDDSUUD, a downlink slot and a special slot respectively represented by a character D, S may both transmit downlink data. Here, the process of transmitting each equal part in the downlink data by using each downlink slot and a special slot in the TDD carrier corresponding to the main carrier may be described in detail with reference to the schematic content in fig. 6. The method includes the steps of dividing downlink data into 10 equal parts according to arrival time of the downlink data, wherein the equal parts are from 0 to 9, and since only the downlink slot and the special slot represented by D, S in the uplink and downlink ratio of the TDD carrier can carry the equal parts corresponding to the downlink data, the equal parts from 0 to 2 can be respectively allocated to the first three downlink slots (i.e., the slot represented by D), the equal part 3 is allocated to the next special slot (i.e., the slot represented by S), the equal part 4 and the equal part 5 are allocated to the fourth downlink slot, the equal part 6 is allocated to the fifth slot, the equal part 7 is allocated to the next special socket, and the equal part 8 and the equal part 9 are allocated to the optimal downlink slot. Of course, the number of equal parts allocated to each downlink slot or each special slot may be randomly adjusted, and is not strictly limited herein.

In this embodiment, the step S200 mainly involves acquiring QoS parameters of the ue according to the primary carrier, and the process may be specifically described as follows: and detecting data borne by each uplink slot in the TDD carrier corresponding to the main carrier, analyzing the detected data and acquiring the QoS parameters of the user equipment from the detected data. It is understood that the QoS parameter of the user equipment will be transmitted to the communication service equipment in the uplink data manner, and then the communication service equipment can detect and resolve the QoS parameter from the received uplink data.

In this embodiment, referring to fig. 3, the step S300 mainly relates to a process of configuring one or more secondary carriers and performing carrier aggregation with a primary carrier when the QoS parameter does not meet the preset delay requirement, and may specifically include steps S310 to S350, which are respectively described as follows.

Step S310, comparing the QoS parameter with a preset delay requirement. The preset delay requirement is a definite provision of uplink and downlink delays in a 5G communication protocol, the protocol defines standards of the uplink delay and the downlink delay, and an operator needs to construct communication service capability meeting the protocol standards.

Step S320, judging whether the QoS parameter meets the time delay requirement, if not, entering step S330, if not, determining that the time delay of the main carrier is increased, and if so, waiting for a long time to send the uplink and downlink data; then, step S350 is performed when the delay requirement is met, and at this time, the main carrier can be determined to have normal delay due to the fact that the delay requirement is met, and the member carrier does not need to be adjusted.

Step S330, one or more secondary carriers are screened from a preset secondary carrier list and the uplink and downlink ratio of each secondary carrier is configured.

In a specific embodiment, the preset secondary carrier list may be screened according to the delay requirement, and one or more secondary carriers adapted to the carrier bandwidth, the uplink/downlink ratio, the channel condition, and the congestion state may be selected from the list. More specifically, the method includes (1) traversing a preset auxiliary carrier list according to a requirement of a delay requirement, where the auxiliary carrier list may include multiple TDD carriers and FDD carriers with different uplink and downlink ratios; (2) if the carrier bandwidth, the uplink and downlink ratio, the channel condition and the congestion state of any one auxiliary carrier in the auxiliary carrier list are judged to meet the time delay requirement, the auxiliary carrier is selected from the auxiliary carrier; (3) if the carrier bandwidth, the uplink and downlink proportion, the channel condition and the congestion state of each auxiliary carrier in the auxiliary carrier list are judged not to meet the delay requirement, a plurality of auxiliary carriers close to the delay condition are sequentially selected from the auxiliary carriers until the selected auxiliary carriers are matched to meet the delay requirement.

In a specific embodiment, when the primary carrier is required to carry uplink data, the secondary carrier obtained by screening is configured as a TDD carrier or an FDD carrier; and when the main carrier is required to bear downlink data, configuring the auxiliary carrier into a TDD carrier. It should be noted here that at least one data transmission air interface (the data transmission air interface is a downlink slot, a special slot, or an uplink slot) is arranged in each subframe of the TDD carrier corresponding to the secondary carrier, and at least one uplink slot is arranged in each subframe of the FDD carrier corresponding to the secondary carrier. This is because there may be D, S, U corresponding downlink slots, special slots or uplink slots respectively in the uplink and downlink ratio of the TDD carrier, so that uplink data may be transmitted or downlink data may be transmitted when the TDD carrier is used as an auxiliary carrier; only the uplink slot corresponding to U is in the FDD carrier, so that only uplink data can be transmitted when the FDD carrier is used as the auxiliary carrier.

Step S340, each secondary carrier is added and activated through carrier aggregation, and then the secondary carrier is used to participate in data transmission in cooperation with the primary carrier after activation.

In a specific embodiment, each selected secondary carrier (SCC) is added to a primary carrier (PCC), and after activation, carries uplink data and/or downlink data together with the primary carrier. A process of cooperatively transmitting uplink and downlink data by the primary carrier and the secondary carrier will be described in a specific step of step S400 below.

And step S350, when the QoS parameter does not meet the preset time delay requirement, continuously keeping the current carrier communication state. If the current carrier communication state is single carrier communication, the state of the single carrier communication is continuously kept; and if the current carrier communication state is the multi-carrier communication, continuously maintaining the state of the multi-carrier communication.

In this embodiment, referring to fig. 4, the step S400 mainly involves screening a preset secondary carrier list according to a delay requirement, and selecting one or more secondary carriers adapted to the carrier bandwidth, the uplink-downlink ratio, the channel condition, and the congestion state from the list, which may specifically include steps S410 to S430, which are respectively described as follows.

Step S410, frame header offset processing is performed on the secondary carrier after carrier aggregation, so that the same data transmission air interfaces of the primary carrier and the secondary carrier after carrier aggregation are staggered with each other.

In a specific embodiment, it is determined that the secondary carrier after carrier aggregation is a TDD carrier or an FDD carrier, and if the secondary carrier is the TDD carrier, frame header offset processing is performed on the TDD carrier, and if the secondary carrier is the FDD carrier, frame header offset processing is not performed, because only the uplink slot indicated by U in the FDD carrier corresponding to the secondary carrier cannot be staggered from the same data transmission air interface in the TDD carrier corresponding to the primary carrier. When performing frame header offset processing on a TDD carrier corresponding to an auxiliary carrier, if carrying uplink data, staggering each uplink slot in the TDD carrier corresponding to a main carrier and each uplink slot in the TDD carrier corresponding to the auxiliary carrier mutually, so as to be beneficial to distributing the uplink data with different arrival times to a nearest data transmission air interface; and if the downlink data is carried, staggering each downlink slot and each special slot in the TDD carrier corresponding to the main carrier and each downlink slot and each special slot in the TDD carrier corresponding to the auxiliary carrier, so that the downlink data with different arrival times can be distributed to a nearest data transmission air interface.

It should be noted that, when the frame structure of TDD is flexibly configured, uplink and downlink staggering of each member carrier is achieved as much as possible, and waiting time delay caused by no available air interface resource transmission at the time of data arrival is avoided, so that the purpose of uplink and downlink time delay enhancement can be better achieved through reasonable frame structure configuration.

Step S420, when the main carrier and the auxiliary carrier after carrier aggregation are used to transmit uplink data, equally dividing the uplink data according to the arrival time of the uplink data, and respectively transmitting equal parts close to each uplink slot in time in the uplink data by using each uplink slot in the TDD carrier corresponding to the main carrier and each uplink slot in the TDD carrier or FDD carrier corresponding to the auxiliary carrier.

For example, fig. 7 illustrates a process of transmitting uplink data by using a TDD carrier corresponding to a primary carrier and an FDD carrier corresponding to a secondary carrier. Firstly, configuring a TDD carrier corresponding to a main carrier, wherein the uplink and downlink proportion is DDDSUDDDSU and the DDDSUDDDSU is respectively represented by slots 0 to 9, the subcarrier interval (SCS) is 30kHz, and the slot length is 0.5 ms. And configuring the FDD carrier corresponding to the secondary carrier, wherein the subcarrier interval (SCS) is 15kHz, and the slot length is 1 ms. Performing Carrier Aggregation (CA) on a main carrier and an auxiliary carrier, adding an FDD carrier corresponding to the auxiliary carrier to the main carrier, performing cooperative transmission of uplink data with a TDD carrier corresponding to the main carrier after activation, dividing the uplink data into 10 equal parts according to the arrival time of the uplink data, wherein the equal parts are equal parts 0 to 9, allocating the equal parts 0 to 2 (the former part of the equal part 2) to the second uplink slot in the FDD carrier corresponding to the auxiliary carrier for uplink transmission because only the uplink slot represented by U can bear the equal parts corresponding to the uplink data, allocating the equal parts 2 (the latter part of the equal part 2) to 4 to the first uplink slot (namely slot4) in the TDD carrier corresponding to the main carrier for uplink transmission, allocating the equal parts 5 to 6 (the former part of the equal part 6) to the fifth uplink slot in the carrier corresponding to the auxiliary carrier for uplink transmission, and allocating the equal part 6 (the latter part of the equal part 6) to the equal part 9 to a second uplink slot (namely slot9) in the TDD carrier corresponding to the primary carrier for uplink transmission. Of course, the number of equal parts allocated to each uplink slot may be randomly adjusted, and is not strictly limited herein. In addition, for the TDD carrier corresponding to the primary carrier, the processing time a1 represents the processing time of the User Equipment (UE) on a single equal part; for the FDD carrier corresponding to the secondary carrier, the processing time a2 represents the processing time of the User Equipment (UE) for a single partition.

It should be noted that, for the schematic scenario in fig. 7, because the TDD carrier corresponding to the primary carrier has an FDD carrier corresponding to the coverage secondary carrier, the full-timing characteristic of the FDD carrier may be utilized, and although the FDD carrier 15kHz has a Slot length with a carrier interval of 1ms, which is not favorable for fast idle transmission of data, a TDD + FDD Carrier Aggregation (CA) manner is adopted, and there is still a gain with respect to the TDD single carrier manner corresponding to the primary carrier, so that the FDD carrier is configured as the secondary carrier and activated, so that the TDD carrier and the FDD carrier are cooperatively scheduled, which is favorable for meeting the requirement of high uplink capacity and also gives consideration to the enhancement of uplink and downlink delay.

For example, fig. 8 illustrates a process of transmitting uplink data by using a TDD carrier corresponding to a primary carrier and an FDD carrier corresponding to a secondary carrier. Firstly, configuring a TDD carrier corresponding to a main carrier, wherein the uplink and downlink proportion is DDDSUDDDSU and the DDDSUDDDSU is respectively represented by slots 0 to 9, the subcarrier interval (SCS) is 30kHz, and the slot length is 0.5 ms. And configuring FDD carrier waves corresponding to the secondary carrier waves, wherein the subcarrier spacing (SCS) is 30kHz, and the slot length is 0.5 ms. The method comprises the steps of carrying out Carrier Aggregation (CA) on a main carrier and an auxiliary carrier, adding an FDD carrier corresponding to the auxiliary carrier to the main carrier, carrying out cooperative transmission on uplink data with a TDD carrier corresponding to the main carrier after activation, dividing the uplink data into 10 equal parts according to the arrival time of the uplink data, wherein the equal parts are from 0 to 9, and only an uplink slot represented by U can bear the equal parts corresponding to the uplink data, so that the equal parts from 0 to 9 can be respectively allocated to a first uplink slot (namely slot0) to a tenth uplink slot (namely slot9) in the FDD carrier corresponding to the auxiliary carrier for uplink transmission, meanwhile, allocating a part of an equal part 4 to a first uplink slot (namely slot4) in the TDD carrier corresponding to the main carrier for uplink transmission, and allocating a part of the equal part 9 to a second uplink slot (namely slot9) in the TDD carrier corresponding to the main carrier for uplink transmission. Of course, the number of equal parts allocated to each uplink slot may be randomly adjusted, and is not strictly limited herein.

For example, fig. 9 illustrates a process of transmitting uplink data by using a TDD carrier corresponding to a main carrier and a TDD carrier corresponding to two secondary carriers. Firstly, configuring a TDD carrier corresponding to a main carrier, wherein the uplink and downlink proportion is DDDDDDDSUU, the subcarrier interval (SCS) is 30kHz, and the slot length is 0.5 ms; configuring TDD carriers corresponding to the auxiliary carrier C1, wherein the uplink and downlink proportion is DSUUDSUUU, the subcarrier spacing (SCS) is 30kHz, and the slot length is 0.5 ms; configuring TDD carrier corresponding to the auxiliary carrier C2, wherein the uplink and downlink ratio is DDSUUDDSUU, the subcarrier spacing (SCS) is 30kHz, and the slot length is 0.5 ms. The method comprises the steps of carrying out Carrier Aggregation (CA) on a main carrier and two auxiliary carriers, adding TDD carriers corresponding to the two auxiliary carriers to the main carrier, and carrying out uplink data transmission with the TDD carriers corresponding to the main carrier after activation, wherein uplink slots represented by a plurality of U exist in the TDD carrier corresponding to the auxiliary carrier C1, and when the TDD carrier corresponding to the main carrier is directly matched, the situation that the U in the main carrier and the U in the auxiliary carrier C1 simultaneously correspond can exist, so that uplink data shunt transmission is not facilitated, frame header offset processing needs to be carried out on the TDD carrier corresponding to the auxiliary carrier C1, the frame header offset is 1ms, the auxiliary carrier C1 and the main carrier are staggered by two data transmission windows (namely staggered by D, S), and therefore, the uplink slots of the two TDD carriers are complementary in time. Then, 10 equal parts of the uplink data are divided according to the arrival time of the uplink data, which are equal parts 0 to 9 respectively, because only the uplink slot represented by U can bear the equal parts corresponding to the uplink data, therefore, the equal parts 0 to 3 can be respectively allocated to the first uplink slot to the third uplink slot (i.e., respectively allocated to the first three characters U) in the TDD carrier corresponding to the auxiliary carrier C1 for uplink transmission, the equal parts 3 to 4 are respectively allocated to the first uplink slot to the second uplink slot (i.e., respectively allocated to the first two characters U) in the TDD carrier corresponding to the auxiliary carrier C2 for uplink transmission, the equal parts 5 to 7 are respectively allocated to the fourth uplink slot to the sixth uplink slot (i.e., respectively allocated to the last three characters U) in the TDD carrier corresponding to the auxiliary carrier C1 for uplink transmission, and the equal parts 8 to 9 are respectively allocated to the first uplink slot to the second uplink slot in the TDD carrier corresponding to the main carrier for uplink transmission. Of course, the number of equal parts allocated to each uplink slot may be randomly adjusted, and is not strictly limited herein.

It should be noted that, for the schematic scenario in fig. 9, because the TDD carrier corresponding to the primary carrier has the TDD carrier C1 corresponding to the covered secondary carrier, the frame header offset between the two carriers is 1ms, so that the uplink slot and the downlink slot of the two TDD carriers are complementary. In the schematic scenario, a TDD + TDD CA manner is adopted, and there is a delay gain with respect to a TDD single carrier corresponding to a main carrier, so that a TDD carrier C1 corresponding to an auxiliary carrier is configured as the auxiliary carrier and activated, and two TDD carriers are cooperatively scheduled, which is beneficial to enhancing uplink and downlink delays. In addition, after the TDD carrier C1 corresponding to the auxiliary carrier is added as the auxiliary carrier, when there is uplink transmission, the uplink transmission waiting is still caused by the downlink slot, so the TDD carrier C2 corresponding to the auxiliary carrier can be configured as the second auxiliary carrier and activated, and the TDD carriers corresponding to the main carrier and the two auxiliary carriers are used for co-scheduling, thereby facilitating the enhancement of uplink and downlink delay.

It should be noted that step S420 is substantially an uplink offloading policy, and includes that after the host carrier receives the bandwidth request, the scheduling unit of the host carrier (for example, MAC in fig. 12) needs to determine which carrier the uplink data packet is distributed to can be scheduled fastest and send the uplink data packet over the air interface, and select the fastest component carrier path to send the data. The uplink shunting strategy needs to comprehensively judge which carrier can finish the air interface transmission of uplink data most quickly by considering the bandwidth, the uplink and downlink ratio, the channel condition of the carrier, the carrier congestion state, the bearing priority and other factors of each member carrier, and authorize the uplink bandwidth to the UE on the corresponding carrier.

Step S430, when the main carrier and the auxiliary carrier after carrier aggregation are used to transmit downlink data, equally dividing the downlink data according to the arrival time of the downlink data, and respectively transmitting equal parts close to each downlink slot or each special slot in the downlink data in time by using each downlink slot and each special slot in the TDD carrier corresponding to the main carrier and each downlink slot and each special slot in the TDD carrier corresponding to the auxiliary carrier.

For example, fig. 10 illustrates a process of transmitting downlink data by using a TDD carrier corresponding to a primary carrier and a TDD carrier corresponding to a secondary carrier. Firstly, configuring a TDD carrier corresponding to a main carrier, wherein the uplink and downlink proportion is DDDSUDDSUU, the subcarrier interval (SCS) is 30kHz, and the slot length is 0.5 ms; configuring TDD carrier corresponding to the auxiliary carrier, wherein the uplink and downlink ratio is DSUUDSUUUDS, the subcarrier spacing (SCS) is 30kHz, and the slot length is 0.5 ms. The method comprises the steps of carrying out Carrier Aggregation (CA) on a main carrier and an auxiliary carrier, adding the TDD carrier corresponding to the auxiliary carrier to the main carrier, and carrying out coordinated transmission of downlink data with the TDD carrier corresponding to the main carrier after activation, wherein a plurality of downlink slots represented by D and special slots represented by S exist in the TDD carrier corresponding to the auxiliary carrier, so that frame header offset processing needs to be carried out on the TDD carrier corresponding to the auxiliary carrier, the frame header offsets for 1ms, the auxiliary carrier and the main carrier are staggered for two data transmission windows (namely staggered D, S), and therefore time complementation of the downlink slots and the special slots of the two TDD carriers is achieved. Then, dividing 10 equal parts of downlink data according to the arrival time of the downlink data, which are equal parts 0 to 9, respectively, since the downlink slot and the special slot represented by D, S all carry the equal parts corresponding to the downlink data, the equal parts 0 to 2 can be respectively allocated to the first downlink slot to the third downlink slot (i.e. to the first three characters D) in the TDD carrier corresponding to the primary carrier for uplink transmission, a part of the equal part 3 is allocated to the second downlink slot (i.e. to the second character D) in the TDD carrier corresponding to the secondary carrier for uplink transmission, another part of the equal part 3 is allocated to the first special slot (i.e. to the first character S) in the TDD carrier corresponding to the primary carrier for uplink transmission, and the equal part 4 is allocated to the second special slot (i.e. to the second character S) in the TDD carrier corresponding to the secondary carrier for uplink transmission, the equal parts 5 to 6 are respectively allocated to the fourth downlink slot to the fifth downlink slot (namely, the fourth and fifth characters D) in the TDD carrier corresponding to the main carrier for uplink transmission, the equal parts 7 are allocated to the second special slot (namely, the second character S) in the TDD carrier corresponding to the main carrier for uplink transmission, and the equal parts 8 to 9 are respectively allocated to the third downlink slot (namely, the third character D) and the third special slot (namely, the third character S) in the TDD carrier corresponding to the auxiliary carrier for uplink transmission. Of course, the number of equal parts allocated to each uplink slot may be randomly adjusted, and is not strictly limited herein.

It should be noted that step S430 is substantially a downlink flexible offloading policy, and includes that after a downlink data packet arrives at a scheduling unit (such as the MAC in fig. 12) of a host carrier, the scheduling unit needs to determine which carrier the downlink data packet is distributed to can be scheduled and transmitted at the air interface fastest, and select the fastest component carrier path to transmit data, and the offloading policy needs to comprehensively determine which carrier can complete the transmission of the downlink data air interface fastest, taking into consideration the bandwidth of each component carrier, the uplink and downlink ratio, the channel condition of the user at the carrier, the carrier congestion state, the bearer priority, and other factors.

Those skilled in the art can understand that the method disclosed in this embodiment reduces uplink and downlink end-to-end delay of the eMBB service to some extent, and the carrier aggregation mode has an obvious delay enhancement effect compared with the single carrier mode. In addition, for some special application scenarios, such as high-reliability low-delay application scenarios, the purpose of delay enhancement can also be achieved by using a carrier aggregation mode.

Example II,

Referring to fig. 11, on the basis of the end-to-end delay enhancing method based on carrier aggregation disclosed in the first embodiment, the present embodiment discloses a communication service device with enhanced delay, which includes a physical access module 11, a first control module 12 and a second control module 13,

the physical access module 11 is used for accessing the user equipment U1 to the main carrier and communicating with the user equipment U1 in a wireless network. The physical access module 11 is located at the lowest layer of the wireless access system, and provides service to the upper layer by taking a transmission channel as an interface; for convenience of understanding, the physical access module 11 may be regarded as a physical layer (PHY) within the LTE radio access protocol architecture, and provides radio access services to a medium access control sublayer (MAC) and a radio link control sublayer (RLC) of an upper layer.

In this embodiment, the physical access module 11 may be disposed at a communication service end (such as a communication service device on a base station), and when responding to a request of the user device U1 to access the wireless network, establish a communication channel with the user device U1 for performing a communication connection. In addition, the physical access module 11 configures uplink and downlink ratios of a main carrier for a communication channel, and transmits uplink data and/or downlink data by using the main carrier. It is understood that the uplink data is data transmitted by the user equipment U1 to the wireless network, and the downlink data is data received by the user equipment U1 from the wireless network.

In this embodiment, a primary carrier (PCC) may be configured as a TDD carrier, where each subframe of the TDD carrier corresponding to the primary carrier is provided with at least one data transmission air interface, and the data transmission air interface is a downlink slot, a special slot, or an uplink slot; when the main carrier is used for transmitting the uplink data, the uplink data can be divided into equal parts according to the arrival time of the uplink data, and each equal part in the uplink data is transmitted by using each uplink slot in the TDD carrier corresponding to the main carrier; when the main carrier is used for transmitting downlink data, the downlink data can be divided into equal parts according to the arrival time of the downlink data, and each downlink slot and each special slot in the TDD carrier corresponding to the main carrier are used for transmitting each equal part in the uplink data.

The first control module 12 is connected to the physical access module 11, and implements data transmission with the physical access module 11. The first control module 12 is configured to obtain a QoS parameter of the ue U1 according to the primary carrier, and configure one or more secondary carriers and perform carrier aggregation with the primary carrier when the QoS parameter does not meet a preset delay requirement. The QoS parameter is used to indicate the communication service quality of the wireless network for the uplink delay and/or the downlink delay.

In a specific embodiment, the first control module 12 may detect, through the physical access module 11, data carried by each uplink slot in the TDD carrier corresponding to the main carrier, analyze the detected data and obtain a QoS parameter of the user equipment from the detected data, compare the QoS parameter with a preset delay requirement, and determine that the delay of the main carrier is increased when the QoS parameter does not meet the delay requirement. In addition, the first control module 12 screens one or more auxiliary carriers from a preset auxiliary carrier list, controls the physical access module to configure uplink and downlink ratios of each auxiliary carrier, and adds and activates each auxiliary carrier through carrier aggregation; it will be appreciated that the secondary carrier is used to participate in the transmission of data in conjunction with the primary carrier after activation.

Specifically, the first control module 12 may filter a preset auxiliary carrier list according to the delay requirement, and select one or more auxiliary carriers adapted to the carrier bandwidth, the uplink-downlink ratio, the channel condition, and the congestion state. For example, the first control module 12 traverses a preset auxiliary carrier list according to the requirement of the delay requirement, where the auxiliary carrier list may include multiple TDD carriers and FDD carriers with different uplink and downlink ratios; if the first control module 12 judges that the carrier bandwidth, the uplink-downlink ratio, the channel condition and the congestion state of any one auxiliary carrier in the auxiliary carrier list meet the delay requirement, the auxiliary carrier is selected from the auxiliary carrier list; if the first control module 12 determines that the carrier bandwidth, the uplink-downlink ratio, the channel condition, and the congestion state of each auxiliary carrier in the auxiliary carrier list do not meet the delay requirement, a plurality of auxiliary carriers close to the delay condition are sequentially selected from the auxiliary carriers until the selected plurality of auxiliary carriers meet the delay requirement after being matched. For specific functions of the first control module 12, reference may be made to step S200 and step S300 in the first embodiment, which are not described herein again.

It should be noted that, when the primary carrier is required to carry uplink data, the secondary carrier may be configured as a TDD carrier or an FDD carrier; when the primary carrier is required to carry downlink data, the secondary carrier may be configured as a TDD carrier. At least one data transmission air interface (the data transmission air interface is a downlink slot, a special slot or an uplink slot) is arranged in each subframe of the TDD carrier corresponding to the auxiliary carrier, and at least one uplink slot is arranged in each subframe of the FDD carrier corresponding to the auxiliary carrier. This is because there may be D, S, U corresponding downlink slots, special slots or uplink slots respectively in the uplink and downlink ratio of the TDD carrier, so that uplink data may be transmitted or downlink data may be transmitted when the TDD carrier is used as an auxiliary carrier; only the uplink slot corresponding to U is in the FDD carrier, so that only uplink data can be transmitted when the FDD carrier is used as the auxiliary carrier.

The second control module 13 is connected with the first control module 12, and realizes data transmission with the first control module 12 and communication with the 5G network. The second control module 12 is configured to perform offloading scheduling on uplink data and/or downlink data by using the primary carrier and the secondary carrier after carrier aggregation, and enhance a delay performance of communication with the user equipment U1 through offloading scheduling.

In a specific embodiment, the second control module 13 may perform frame header offset processing on the secondary carrier after carrier aggregation, so that the same data transmission air interfaces of the primary carrier and the secondary carrier after carrier aggregation are staggered with each other; when the uplink data is transmitted by using the main carrier and the auxiliary carrier after carrier aggregation, the second control module 13 divides the uplink data into equal parts according to the arrival time of the uplink data, and transmits equal parts close to each uplink slot in time in the uplink data by using each uplink slot in the TDD carrier corresponding to the main carrier and each uplink slot in the TDD carrier or FDD carrier corresponding to the auxiliary carrier; when the second control module 13 performs downlink data transmission by using the main carrier and the auxiliary carrier after carrier aggregation, the downlink data is divided into equal parts according to the arrival time of the downlink data, and the equal parts close to each downlink slot or each special slot in time in the downlink data are transmitted by using each downlink slot and special slot in the TDD carrier corresponding to the main carrier and each downlink slot and special slot in the TDD carrier corresponding to the auxiliary carrier, respectively. For specific functions of the second control module 13, reference may be made to step S400 in the first embodiment, which is not described herein again.

For clear understanding of the enhanced latency communication service device disclosed in the present embodiment, the principle of downlink data offloading scheduling illustrated in fig. 12 will be described herein. In the application process of a 5G core network (i.e., 5GC), a 5G base station is often set to perform wireless connection with User Equipment (UE), so that the user equipment is accessed to a 5G wireless network to realize smooth transmission of uplink and downlink data. A physical layer (PHY) may be located at the lowest layer of the radio access system and serve as an interface for a transport channel to an upper layer, and then the PHY may access the user equipment U1 to the primary carrier and communicate with the user equipment U1 in a wireless network.

A media access control sublayer (MAC) and a physical layer (PHY) can be set for a primary carrier (PCC) to carry out communication connection, so that the media access control sublayer acquires a QoS parameter of User Equipment (UE) according to the primary carrier, and configures one or more auxiliary carriers and carries out carrier aggregation with the primary carrier when the QoS parameter does not meet a preset delay requirement; the QoS parameter is used to indicate the communication service quality of the wireless network for the uplink delay and/or the downlink delay. For the function of the MAC, reference may be made to the first control module 12 in this embodiment. A radio link control sublayer (RLC) and a media access control sublayer (MAC) may be set for a primary carrier (PCC) to perform communication connection, so that the radio link control sublayer performs offloading scheduling of uplink data and/or downlink data by using the primary carrier and the secondary carrier after carrier aggregation, and enhances a delay performance of communication with a User Equipment (UE) by offloading scheduling.

Similarly, a medium access control sublayer (MAC) and a radio link control sublayer (RLC) may be provided for the secondary carrier (SCC), where the radio link control sublayer (RLC) of the secondary carrier (SCC) receives offloading scheduling of data, and performs uplink and downlink control on the offloading scheduled data. The media access control sublayer (MAC) of the secondary carrier (SCC) communicates with the radio link control sublayer (RLC) and the corresponding physical layer (PHY), and detects and controls uplink and downlink data carried on the secondary carrier (SCC).

Referring to fig. 12, a primary carrier (PCC) is a data aggregation end, uplink and downlink data need to be shunted from the primary carrier to a configured secondary carrier (SCC), fast distribution of data needs to be considered during data shunting scheduling, and data is shunted to a corresponding carrier if it is determined in real time which carrier the current data can obtain the fastest air interface sending opportunity, so as to implement the best end-to-end delay performance.

In this embodiment, the provided technical solution is applicable to all scenarios in which uplink and downlink delay requirements cannot be met by a single carrier, and an auxiliary carrier can be used for carrier aggregation. The multi-carrier complementation can be realized through Carrier Aggregation (CA) and optional frame header offset, the aim of effectively reducing the end-to-end time delay of the uplink and the downlink is achieved through a flexible multi-carrier cooperative scheduling and shunting strategy, and the obvious time delay gain is realized compared with the single carrier.

Example III,

In this embodiment, a computer-readable storage medium is further provided, where one or more computer programs are stored, and the one or more computer programs can be executed by one or more processors to implement the end-to-end delay enhancement method disclosed in the first embodiment.

In the present embodiment, the computer-readable storage media includes volatile or nonvolatile, removable or non-removable media implemented in any method or technology for storage of information such as computer-readable instructions, data structures, computer program modules or other data. Computer-readable storage media include, but are not limited to, RAM (Random Access Memory), ROM (Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), flash Memory or other Memory technology, CD-ROM (Compact disk Read-Only Memory), Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer.

It will be apparent to those skilled in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software (which may be implemented in computer program code executable by a computing device), firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit.

In addition, communication media typically embodies computer readable instructions, data structures, computer program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to one of ordinary skill in the art. Thus, the present invention is not limited to any specific combination of hardware and software.

The foregoing is a more detailed description of embodiments of the present invention, and the present invention is not to be considered limited to such descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. An end-to-end delay enhancement method based on carrier aggregation comprises the following steps:

accessing user equipment into a main carrier and carrying out wireless network communication with the user equipment, wherein the main carrier is used for bearing uplink data and/or downlink data;

acquiring a QoS parameter of the user equipment according to the main carrier, wherein the QoS parameter is used for expressing the communication service quality of a wireless network aiming at uplink time delay and/or downlink time delay;

when the QoS parameter does not meet the preset time delay requirement, configuring one or more auxiliary carriers and carrying out carrier aggregation with the main carrier;

and carrying out shunting scheduling on the uplink data and/or the downlink data by using the main carrier and the auxiliary carrier after carrier aggregation, and enhancing the time delay performance of communication with the user equipment through shunting scheduling.

2. The end-to-end delay enhancement method of claim 1, wherein the accessing a user equipment to a primary carrier and communicating with the user equipment in a wireless network comprises:

responding to a request of a user device for accessing a wireless network, and establishing a communication channel between the user device and the user device for communication connection;

configuring uplink and downlink proportion of a main carrier for the communication channel, and transmitting uplink data and/or downlink data by using the main carrier; the uplink data is data sent by the user equipment to a wireless network, and the downlink data is data received by the user equipment from the wireless network.

3. The end-to-end delay enhancement method of claim 2, wherein configuring uplink and downlink ratios of a primary carrier for the communication channel, and using the primary carrier for uplink data and/or downlink data transmission comprises:

configuring the primary carrier as a TDD carrier; each subframe of the TDD carrier corresponding to the main carrier is provided with at least one data transmission air interface, where the data transmission air interface is a downlink slot, a special slot, or an uplink slot;

dividing the uplink data into equal parts according to the arrival time of the uplink data, and transmitting the equal parts in the uplink data by using each uplink slot in the TDD carrier corresponding to the main carrier; or, equally dividing the downlink data according to the arrival time of the downlink data, and transmitting the equally divided portions in the uplink data by using each downlink slot and a special slot in the TDD carrier corresponding to the main carrier.

4. The end-to-end delay enhancement method of claim 3, wherein obtaining the QoS parameter of the UE according to the primary carrier comprises: and detecting data borne by each uplink slot in the TDD carrier corresponding to the main carrier, analyzing the detected data and acquiring the QoS parameters of the user equipment from the detected data.

5. The end-to-end delay enhancement method of claim 3, wherein when the QoS parameter does not meet a preset delay requirement, configuring one or more secondary carriers and performing carrier aggregation with the primary carrier comprises:

comparing the QoS parameter with a preset time delay requirement, and determining that the time delay of the main carrier is increased when the QoS parameter is judged not to meet the time delay requirement;

screening one or more auxiliary carriers from a preset auxiliary carrier list, configuring the uplink and downlink proportion of each auxiliary carrier, and adding and activating each auxiliary carrier through carrier aggregation; the secondary carrier is used for cooperating with the main carrier to participate in data transmission after being activated.

6. The end-to-end delay enhancement method of claim 5, wherein the step of screening one or more secondary carriers from a preset secondary carrier list and configuring uplink and downlink ratios of each secondary carrier, and the step of adding and activating each secondary carrier through carrier aggregation comprises the steps of:

screening a preset auxiliary carrier list according to the time delay requirement, and selecting one or more auxiliary carriers with adaptive carrier bandwidth, uplink and downlink proportion, channel conditions and congestion states;

when the main carrier bears the uplink data, configuring the auxiliary carrier into a TDD carrier or an FDD carrier; when the main carrier bears the downlink data, configuring the auxiliary carrier into a TDD carrier; each subframe of the TDD carrier corresponding to the secondary carrier is provided with at least one data transmission air interface, and each subframe of the FDD carrier corresponding to the secondary carrier is provided with at least one uplink slot;

and adding each selected auxiliary carrier to the main carrier, and carrying the uplink data and/or the downlink data together with the main carrier after activation.

7. The end-to-end delay enhancement method of claim 6, wherein the step of screening a preset secondary carrier list according to the delay requirement and selecting one or more secondary carriers with adaptive carrier bandwidth, uplink and downlink ratio, channel condition and congestion status comprises:

traversing a preset auxiliary carrier list according to the requirement of the time delay requirement, wherein the auxiliary carrier list comprises a plurality of TDD carriers and FDD carriers with different uplink and downlink proportions;

if the carrier bandwidth, the uplink and downlink ratio, the channel condition and the congestion state of any one auxiliary carrier in the auxiliary carrier list are judged to meet the time delay requirement, the auxiliary carrier is selected from the auxiliary carrier;

if the carrier bandwidth, the uplink and downlink ratio, the channel condition and the congestion state of each auxiliary carrier in the auxiliary carrier list are judged not to reach the delay requirement, a plurality of auxiliary carriers close to the delay condition are sequentially selected from the auxiliary carriers until the selected auxiliary carriers reach the delay requirement after being matched.

8. The end-to-end delay enhancement method of claim 6, wherein the performing of the split scheduling of the uplink data and/or the downlink data by using the primary carrier and the secondary carrier after carrier aggregation comprises:

performing frame header offset processing on the secondary carrier after carrier aggregation to enable the same data transmission air interfaces of the main carrier and the secondary carrier after carrier aggregation to be staggered;

when the uplink data is transmitted by using a main carrier and an auxiliary carrier after carrier aggregation, dividing the uplink data into equal parts according to the arrival time of the uplink data, and respectively transmitting equal parts close to each uplink slot in time in the uplink data by using each uplink slot in a TDD carrier corresponding to the main carrier and each uplink slot in a TDD carrier or an FDD carrier corresponding to the auxiliary carrier;

when the main carrier and the auxiliary carrier after carrier aggregation are used for transmitting the downlink data, the downlink data are divided into equal parts according to the arrival time of the downlink data, and the equal parts close to each downlink slot or each special slot in time in the downlink data are transmitted by using each downlink slot and special slot in the TDD carrier corresponding to the main carrier and each downlink slot and special slot in the TDD carrier corresponding to the auxiliary carrier respectively.

9. The end-to-end delay enhancement method of claim 8, wherein performing frame header offset processing on the secondary carrier after carrier aggregation to make the same data transmission air interfaces of the primary carrier and the secondary carrier after carrier aggregation staggered with each other comprises:

judging whether the auxiliary carrier after carrier aggregation is a TDD carrier or an FDD carrier, if so, performing frame header offset processing on the TDD carrier, and if not, performing frame header offset processing;

when performing frame header offset processing on the TDD carrier corresponding to the secondary carrier, if the uplink data is carried, staggering each uplink slot in the TDD carrier corresponding to the primary carrier and each uplink slot in the TDD carrier corresponding to the secondary carrier; and if the downlink data is carried, staggering each downlink slot and special slot in the TDD carrier corresponding to the main carrier and each downlink slot and special slot in the TDD carrier corresponding to the auxiliary carrier.

10. An enhanced latency communication service apparatus, comprising:

the system comprises a physical access module, a wireless network module and a data transmission module, wherein the physical access module is used for accessing user equipment into a main carrier and carrying out wireless network communication with the user equipment, and the main carrier is used for bearing uplink data and/or downlink data;

the first control module is connected with the physical access module and used for acquiring the QoS parameters of the user equipment according to the main carrier, and configuring one or more auxiliary carriers and carrying out carrier aggregation with the main carrier when the QoS parameters do not meet the preset time delay requirement; the QoS parameter is used for representing the communication service quality of the wireless network aiming at the uplink time delay and/or the downlink time delay;

and the second control module is connected with the first control module and is used for carrying out shunting scheduling on the uplink data and/or the downlink data by utilizing the main carrier and the auxiliary carrier after carrier aggregation, and enhancing the time delay performance of communication with the user equipment through shunting scheduling.

11. The communication service device of claim 10, wherein the physical access module is disposed at a communication service end, and establishes a communication channel with the user device for performing a communication connection when responding to a request of the user device for accessing the wireless network;

the physical access module configures the uplink and downlink proportion of a main carrier for the communication channel, and transmits uplink data and/or downlink data by using the main carrier; the uplink data is data sent by the user equipment to a wireless network, and the downlink data is data received by the user equipment from the wireless network.

12. The communication service device of claim 10, wherein the first control module detects the primary carrier through the physical access module and obtains a QoS parameter of the ue, compares the QoS parameter with a preset delay requirement, and determines that the delay of the primary carrier is increased when the QoS parameter does not meet the delay requirement;

the first control module screens one or more auxiliary carriers from a preset auxiliary carrier list, controls the physical access module to configure the uplink and downlink proportion of each auxiliary carrier, and adds and activates each auxiliary carrier through carrier aggregation; the auxiliary carrier is used for cooperating with the main carrier to participate in data transmission after being activated;

the main carrier is configured as a TDD carrier, at least one data transmission air interface is arranged in each subframe of the TDD carrier corresponding to the main carrier, and the data transmission air interface is a downlink slot, a special slot or an uplink slot; the auxiliary carrier is configured to be a TDD carrier or an FDD carrier, at least one data transmission air interface is arranged in each subframe of the TDD carrier corresponding to the auxiliary carrier, and at least one uplink slot is arranged in each subframe of the FDD carrier corresponding to the auxiliary carrier.

13. The communication service apparatus of claim 12, wherein the second control module performs frame header offset processing on the secondary carrier after carrier aggregation, so that the same data transmission air interfaces of the primary carrier and the secondary carrier after carrier aggregation are staggered with each other;

when the second control module uses the main carrier and the auxiliary carrier after carrier aggregation to transmit the uplink data, the second control module divides the uplink data into equal parts according to the arrival time of the uplink data, and respectively transmits equal parts close to each uplink slot in time in the uplink data by using each uplink slot in the TDD carrier corresponding to the main carrier and each uplink slot in the TDD carrier or the FDD carrier corresponding to the auxiliary carrier;

14. A computer readable storage medium, characterized in that the computer readable storage medium stores one or more computer programs executable by one or more processors to implement the end-to-end latency enhancement method of any one of claims 1 to 9.