CN108633023B - Service preemption method, device and base station - Google Patents

Service preemption method, device and base station Download PDF

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CN108633023B
CN108633023B CN201710180267.7A CN201710180267A CN108633023B CN 108633023 B CN108633023 B CN 108633023B CN 201710180267 A CN201710180267 A CN 201710180267A CN 108633023 B CN108633023 B CN 108633023B
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symbol
preemption
service
resource
embb
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CN108633023A (en
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黄甦
张飒
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Spreadtrum Communications Shanghai Co Ltd
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Spreadtrum Communications Shanghai Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/535—Allocation or scheduling criteria for wireless resources based on resource usage policies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies

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

Abstract

A method, a device and a base station for business preemption are provided, and the method for business preemption comprises the following steps: when a URLLC service seizes an eMMC service, scheduling the URLLC service on a symbol resource except a symbol set which is forbidden to seize for seizing in each downlink unit transmission unit of the eMMC service, wherein the symbol set which is forbidden to seize is configured in advance; and transmitting URLLC service data by using the preempted symbol resources. The technical scheme of the invention can reduce the influence of URLLC service preemption on the eMBB service performance.

Description

Service preemption method, device and base station
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a base station for seizing a service.
Background
In downlink transmission, a bursty Ultra-low-delay high-reliability communication (URLLC) service may occupy resources used by an ongoing enhanced mobile broadband (eMBB) service to ensure a delay requirement. The eMBB service is affected by preemption (preemption) of the eMBB service by the URLLC service.
In the prior art, a scheme for seizing an eMBB service by a URLLC service is mainly limited to emulation. In simulation, when part of symbols in downlink data of the eMMC are preempted by URLLC service, if the resource preemption indication is not available, eMMC User Equipment (User Equipment, UE) wrongly uses the data of the URLLC as the data thereof for demodulation, thereby causing serious performance deterioration; if the resource preemption indication exists, the eMBB user discards the data preempted by URLLC, which is equivalent to that the eMBB data transmission equivalent code Rate is reduced, so that the Block Error Rate (BLER) is increased, the performance is more or less deteriorated, but the performance is better than that when the resource preemption indication does not exist. Another solution is that, when the resource preemption indication is included, the URLLC avoids preempting Reference Signal (RS) resources of the eMBB, and ensures that channel estimation of the eMBB can be performed normally to support demodulation of the eMBB data.
However, the conventional scheme has a disadvantage in that the actual eMBB UE may have multiple sets of reference signals, for example, a data Demodulation reference signal (DMRS), a Phase noise reference signal (PT-RS), and a Channel state information reference signal (CSI-RS). If the URLLC avoids scheduling on the symbols of all the RSs, the number of selectable symbols of the URLLC is possibly very small, so that the URLLC cannot be preempted, the service delay of the URLLC is increased, and the significance brought by introducing the preemption behavior is reduced. In addition, resources that are not used for transmitting RS may be preempted by URLLC, and then URLLC needs to know the RS configuration of the current eMBB user; for URLLC, additional signaling overhead is required, making reception opaque.
Disclosure of Invention
The invention solves the technical problem of how to reduce the influence of URLLC service preemption on eMBB service performance.
In order to solve the above technical problem, an embodiment of the present invention provides a service preemption method, where the service preemption method includes:
when a URLLC service seizes an eMMC service, scheduling the URLLC service on a symbol resource except a symbol set which is forbidden to seize for seizing in each downlink unit transmission unit of the eMMC service, wherein the symbol set which is forbidden to seize is configured in advance; and transmitting URLLC service data by using the preempted symbol resources.
Optionally, the service preemption method further includes: and sending resource preemption indication information to eMB user equipment to inform the eMB user equipment of the position of the preempted symbol resource.
Optionally, the sending the resource preemption indication information to the eMBB user equipment includes: determining a first frequency resource position of the eMBB user equipment on the preempted symbol resource and a second frequency resource position of the URLLC service data on the preempted symbol resource; and if the first frequency resource position and the second frequency resource position are overlapped, sending the resource preemption indication information to the eMBB user equipment.
Optionally, before scheduling the URLLC service to preempt on a symbol resource outside the prohibited symbol set, the method further includes: and sending the positions of all symbol resources in the prohibition preemption symbol set to the eMBB user equipment.
Optionally, the number of bits occupied by the resource preemption indication information is equal to: and the difference between the total number of the symbol resources occupied by the downlink unit transmission unit of the eMBB service and the total number of all the symbol resources in the symbol set prohibited from being seized.
Optionally, after receiving the resource preemption indication information, the eMBB user equipment clears the log-likelihood ratio of the data bits carried on the preempted symbol resources.
Optionally, the symbol set to prohibit preemption at least includes symbol resources occupied by preamble demodulation reference signals.
Optionally, the time length of the downlink unit transmission unit of the eMBB service is the same as or different from the time length of the downlink unit transmission unit of the URLLC service.
In order to solve the above technical problem, an embodiment of the present invention further discloses a service preemption device, where the service preemption device includes:
a preemption module, adapted to, when a URLLC service preempts an eMBB service, schedule the URLLC service to preempt on a symbol resource other than a preemption-prohibited symbol set in each downlink unit transmission unit of the eMBB service, where the preemption-prohibited symbol set is pre-configured; and the URLLC service data sending module is suitable for sending the URLLC service data by utilizing the occupied symbol resources.
Optionally, the service preemption device further includes: and the preemption indicating module is suitable for sending resource preemption indicating information to the eMB user equipment so as to inform the eMB user equipment of the position of the preempted symbol resource.
Optionally, the preemption instructing module includes: a determining unit adapted to determine a first frequency resource location of the eMBB user equipment on the preempted symbol resource and a second frequency resource location of the URLLC traffic data on the preempted symbol resource; a sending unit, adapted to send the resource preemption indication information to the eMBB user equipment if there is a coincidence between the first frequency resource location and the second frequency resource location.
Optionally, the service preemption device further includes: a position sending module adapted to send positions of all symbol resources in the preemptive-prohibited symbol set to the eMBB user equipment.
Optionally, the number of bits occupied by the resource preemption indication information is equal to: and the difference between the total number of the symbol resources occupied by the downlink unit transmission unit of the eMBB service and the total number of all the symbol resources in the symbol set prohibited from being seized.
Optionally, after receiving the resource preemption indication information, the eMBB user equipment clears the log-likelihood ratio of the data bits carried on the preempted symbol resources.
Optionally, the symbol set to prohibit preemption at least includes symbol resources occupied by preamble demodulation reference signals.
Optionally, the time length of the downlink unit transmission unit of the eMBB service is the same as or different from the time length of the downlink unit transmission unit of the URLLC service.
In order to solve the above technical problem, an embodiment of the present invention further discloses a base station, where the base station includes the service preemption device.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
when a URLLC service seizes an eMMC service, the URLLC service is scheduled to seize on a symbol resource except a symbol set which is prohibited to seize in each downlink unit transmission unit of the eMMC service, wherein the symbol set which is prohibited to seize is pre-configured; and transmitting URLLC service data by using the preempted symbol resources. In the technical scheme of the invention, the symbol resources in the set can be ensured not to be preempted by the URLLC service by configuring the occupation forbidding symbol set, so that the symbol resources in the occupation forbidding symbol set can be ensured to be normally used by the eMBB service, the performance of the eMBB service is ensured, and the influence of the URLLC service occupation on the eMBB service performance is reduced; in addition, the resource granularity which is not allowed to be preempted by the URLLC service is a symbol, and the resource configuration of a reference signal of the eMBL service is not required to be known, so that the quantity of the resources which can be preempted by the URLLC service is ensured, and the URLLC service can be normally executed.
Further, sending resource preemption indication information to the eMB user equipment to inform the eMB user equipment of the position of the preempted symbol resource; the bit number occupied by the resource preemption indication information is equal to: and the difference between the total number of the symbol resources occupied by the downlink unit transmission unit of the eMBB service and the total number of all the symbol resources in the symbol set prohibited from being seized. When the technical scheme of the invention sends the resource preemption indicating information, because the preempted symbol resources cannot forbid to preempt the symbol resources in the symbol set, the symbol resource set which can be preempted in each downlink unit transmission unit is reduced, and the bit number occupied by the resource preemption indicating information is also reduced, thereby reducing the signaling overhead.
Further, the symbol set for prohibiting preemption at least comprises the symbol resources occupied by the preamble data demodulation reference signal. The technical scheme of the invention limits the symbol set forbidden to be seized to the symbol resource occupied by the Front-loaded DMRS, because the Front-loaded DMRS usually only occupies 1 to 2 symbols, and the URLLC service can normally seize in the data area of each downlink unit transmission unit of the eMBB service, the time delay influence on the URLLC service during the seizing can be ensured to be as small as possible. In addition, the preamble data demodulation reference signal can be used for demodulation of the eMMC user equipment, and symbol resources occupied by the preamble data demodulation reference signal are guaranteed not to be occupied by the URLLC service, so that the eMMC user equipment can be guaranteed to demodulate normally, and the performance of the eMMC service under a preemption scene is guaranteed.
Drawings
Fig. 1 is a flowchart of a service preemption method according to an embodiment of the present invention;
fig. 2 is a schematic view of an application scenario of a service preemption method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a service preemption device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another service preemption device in accordance with an embodiment of the present invention.
Detailed Description
As described in the background, the conventional scheme has a disadvantage in that the actual eMBB UE may have multiple sets of reference signals, for example, a data Demodulation reference signal (DMRS), a Phase noise reference signal (PT-RS), and a Channel state information reference signal (CSI-RS). If the URLLC avoids scheduling on the symbols of all the RSs, the number of selectable symbols of the URLLC is possibly very small, so that the URLLC cannot be preempted, the service delay of the URLLC is increased, and the significance brought by introducing the preemption behavior is reduced. In addition, resources that are not used for transmitting RS may be preempted by URLLC, and then URLLC needs to know the RS configuration of the current eMBB user; for URLLC, additional signaling overhead is required, making reception opaque.
In the technical scheme of the invention, the symbol resources in the set can be ensured not to be preempted by the URLLC service by configuring the occupation forbidding symbol set, so that the symbol resources in the occupation forbidding symbol set can be ensured to be normally used by the eMBB service, the performance of the eMBB service is ensured, and the influence of the URLLC service occupation on the eMBB service performance is reduced; in addition, the resource granularity which is not allowed to be preempted by the URLLC service is a symbol, and the resource configuration of a reference signal of the eMBL service is not required to be known, so that the quantity of the resources which can be preempted by the URLLC service is ensured, and the URLLC service can be normally executed.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 1 is a flowchart of a service preemption method according to an embodiment of the present invention.
The service preemption method in this embodiment can be used at the base station side.
The service preemption method shown in fig. 1 may include the following steps:
step S101: when a URLLC service seizes an eMMC service, scheduling the URLLC service on a symbol resource except a symbol set which is forbidden to seize for seizing in each downlink unit transmission unit of the eMMC service, wherein the symbol set which is forbidden to seize is configured in advance;
step S102: and transmitting URLLC service data by using the preempted symbol resources.
In this embodiment, the eMBB service and the URLLC service may be two communication scenarios. The eMBB service can provide higher bandwidth, such as high-flow mobile broadband services like ultra-high-definition video; the URLLC business can meet various real-time communication requirements and has higher reliability, such as unmanned driving and industrial automation business. Specifically, the eMBB service and the URLLC service may be implemented on the same base station side, or may be implemented on different base stations.
In order to ensure low time delay of the URLLC service, the URLLC service occupies time-frequency resources of the eMBB service while the eMBB service is in progress. Specifically, preemption may occur when the maximum bandwidth (i.e., system bandwidth) occupied by the URLLC service is consistent with the maximum bandwidth (i.e., system bandwidth) occupied by the eMBB service. Specifically, the seized URLLC service may correspond to a single URLLC user equipment, or may correspond to multiple URLLC user equipments. Similarly, the preempted eMBB service may correspond to a single eMBB user equipment, or may correspond to a plurality of eMBB user equipments.
As will be appreciated by those skilled in the art, an eMBB user equipment may be a user equipment using eMBB services; the URLLC user equipment may be user equipment using URLLC services.
In a specific implementation, the set of preemption prohibition symbols may be configured in advance by the base station, or may be specified by a protocol (i.e., a communication standard or a communication protocol). Then, in step S101, when the URLLC service preempts the eMBB service, in each downlink unit transmission unit of the eMBB service, the URLLC service is scheduled to preempt on a symbol resource other than the symbol set that is prohibited from preempting. Specifically, the downlink unit TTI represents the minimum data Transmission Time and may also be referred to as a Transmission Time Interval (TTI). In each downlink unit transmission unit of the eMMC service, the URLLC service can be scheduled to seize symbol resources except for the symbol set which is forbidden to be seized, and the eMMC service on the symbol set which is forbidden to be seized is not influenced.
For example, if the transmission unit of the eMBB service downlink unit is a subframe, that is, 14 symbol resources, and the symbol set is prohibited to be seized as 3 rd and 4 th symbols, the URLLC service may be seized on the 1 st, 2 nd, 5 th to 14 th symbols, and the services of the eMBB service on the 3 rd and 4 th symbols are not affected. Further, the first two symbols (i.e. the 1 st and 2 nd symbols) in each subframe are control regions, and the remaining symbols are data regions, and URLLC service preemption does not normally preempt a control region, so URLLC service can preempt on the 5 th to 14 th symbols.
In a specific implementation, after the preemption is completed, in step S102, URLLC service data may be sent by using the preempted symbol resource. That is, the seized symbol resources are utilized to transmit URLLC traffic data to at least one URLLC user equipment.
The embodiment of the invention can ensure that the symbol resources in the set cannot be preempted by the URLLC service through configuring the occupation forbidding symbol set, thereby ensuring that the symbol resources in the occupation forbidding symbol set can be normally used by the eMBB service, ensuring the performance of the eMBB service and reducing the influence of the URLLC service occupation on the performance of the eMBB service; in addition, the resource granularity which is not allowed to be preempted by the URLLC service is a symbol, and the resource configuration of a reference signal of the eMBL service is not required to be known, so that the quantity of the resources which can be preempted by the URLLC service is ensured, and the URLLC service can be normally executed.
Preferably, step S102 may be followed by: and sending resource preemption indication information to eMB user equipment to inform the eMB user equipment of the position of the preempted symbol resource.
In a specific implementation, after preemption is completed, the eMBB user equipment may be notified of the position of the symbol resource preempted by the URLLC service through the resource preemption indication information. Because the preempted symbol resource transmits URLLC service data, the eMMC user equipment can avoid demodulating the URLLC service data on the preempted symbol resource by informing the eMMC user equipment of the position of the preempted symbol resource, thereby avoiding the performance deterioration of the eMMC service and the increase of the block error rate.
Further, after receiving the resource preemption indication information, the eMBB user equipment clears the data bit log-likelihood ratio carried on the preempted symbol resources. Specifically, before receiving the resource preemption indication information, the eMBB user equipment may demodulate a data bit log-Likelihood ratio (LLR) carried on each symbol in the downlink unit transmission unit. For example, the log-likelihood ratio of the data bit carried on each symbol in the downlink unit transmission unit is demodulated as follows: { LLR }1 3，LLR2 3，…，LLRn3 3,LLR1 4，LLR2 4，…，LLRn4 4,…,LLR1 14，LLR2 14，…，LLRn14 14}. Wherein, the LLRn lThe nth LLR is decoded on the ith symbol, and nl is the number of bits included in the ith symbol. The number of data bits in different symbols may differ due to the possibility of carrying corresponding reference signals on the symbols. Assuming URLLC service preemption symbols 8, 9, 12, and 13, then eMB service data bit LLRs on symbols 8, 9, 12, and 13 are invalid, and after the eMB user equipment receives the resource preemption indication information, the eMB user equipment clears bit LLRs on symbols 8, 9, 12, and 13, that is, { LLRs1 8＝0，LLR2 8＝0，…，LLRn8 8＝0，LLR1 9＝0，LLR2 9＝0，…，LLRn9 9＝0，LLR1 12＝0，LLR2 12＝0，…，LLRn12 12＝0，LLR1 13＝0，LLR2 13＝0，…，LLRn13 130, and then fed to the decoder.
Further, the sending of the resource preemption indication information to the eMBB user equipment may include the following steps: determining a first frequency resource position of the eMBB user equipment on the preempted symbol resource and a second frequency resource position of the URLLC service data on the preempted symbol resource; and if the first frequency resource position and the second frequency resource position are overlapped, sending the resource preemption indication information to the eMBB user equipment.
In specific implementation, reference may be made to fig. 2, and fig. 2 is a schematic view of an application scenario of a service preemption method according to an embodiment of the present invention. Wherein the horizontal direction represents a time domain symbol and the vertical direction represents a frequency domain bandwidth. each downlink unit transmission unit of the eMBB service includes 14 symbols. There are three user equipments in the system bandwidth f1-f4 of the eMBB service: the eMB user equipment 1, the eMB user equipment 2 and the eMB user equipment 3 respectively occupy certain bandwidth.
After the preemption is completed, the URLLC service preempts the symbol 7, the symbol 8, the symbol 11 and the symbol 12 in the time domain (as shown by the shaded part). For the eMB user equipment 1, the first frequency resource position is f1-f2, the second frequency resource position of the URLLC service in the frequency domain of the symbol 7 and the symbol 8 is f1-f5, and the first frequency resource position and the second frequency resource position are overlapped, so that the resource preemption indication information can be sent to the eMB user equipment 1 to inform the eMB user equipment 1 that the symbol 7 and the symbol 8 are preempted.
Further, in the symbol 7 and symbol 8 frequency domains, the URLLC service occupies a part of the bandwidth of the eMBB user equipment 1 and the bandwidth of the eMBB user equipment 2 (f2-f 3); in the symbol 11 and symbol 12 frequency domains, URLLC traffic occupies a portion of the bandwidth (f3-f4) of the eMBB user equipment 3. In this case, even if URLLC traffic occupies a portion of the bandwidth of the eMBB user equipment 2 and a portion of the bandwidth of the user equipment 3, the eMBB user equipment 2 symbols 7 and 8 may be indicated to be preempted, and the eMBB user equipment 3 symbols 11 and 12 to be preempted, in the resource preemption indication information. Then, the eMBB user equipment 2 discards all data on symbols 7 and 8 at the time of demodulation, and the eMBB user equipment 3 discards all data on symbols 11 and 12 at the time of demodulation.
Preferably, the following steps may be included before step S101: and sending the positions of all symbol resources in the prohibition preemption symbol set to the eMBB user equipment. Specifically, if the prohibited preemption symbol set is pre-configured by the base station, the positions of all symbol resources in the prohibited preemption symbol set may be sent by the base station to the eMBB user equipment. If the prohibited symbol set is specified by the protocol, the eMBB user equipment already knows the positions of all symbol resources in the prohibited symbol set without being informed by the base station.
Further, the number of bits occupied by the resource preemption indication information is equal to: and the difference between the total number of the symbol resources occupied by the downlink unit transmission unit of the eMBB service and the total number of all the symbol resources in the symbol set prohibited from being seized. In this embodiment, the positions of all symbol resources in the symbol set that is prohibited from preempting are notified to the eMBB user equipment, so that the number of bits occupied by the resource preemption indication information can be reduced, thereby reducing signaling overhead.
Specifically, taking the example that the downlink unit transmission unit occupies 14 symbols, if the eMBB user equipment cannot know the positions of all symbol resources in the prohibited symbol set, the resource preemption indication information needs 14 bits, and each bit corresponds to each symbol. If the eMBB user equipment knows that the positions of all symbol resources in the prohibited symbol set are 3 rd and 4 th symbols, the resource preemption indication information needs 12 bits, and each bit corresponds to 1 st, 2 nd, 5 th to 14 th symbols.
Further, the number of bits occupied by the resource preemption indication information is equal to: and subtracting the total number of all symbol resources in the symbol set prohibited from seizing and the total number of the symbol resources occupied by the control region from the total number of the symbol resources occupied by the downlink unit transmission unit of the eMBB service. Taking the example that a downlink unit transmission unit occupies 14 symbols, the first two symbols of the downlink unit transmission unit are control areas, and the URLLC service usually does not seize the control areas. Therefore, if the eMBB user equipment knows that the positions of all symbol resources in the prohibited symbol set are the 3 rd and 4 th symbols, the resource preemption indication information only needs 10 bits, and each bit corresponds to the 5 th to 14 th symbols.
Preferably, the time length of the downlink unit transmission unit of the eMBB service is the same as or different from the time length of the downlink unit transmission unit of the URLLC service. For example, the downlink unit transmission unit of the eMBB service occupies 10ms, and the downlink unit transmission unit of the URLLC service occupies 5 ms.
Preferably, the set of preemptive inhibiting symbols includes at least the symbol resources occupied by the preamble demodulation reference signal.
Further, the symbol set is prohibited from being preempted only by the symbol resource occupied by the preamble demodulation reference signal.
Specifically, a symbol set in which a preamble-loaded DMRS (preamble-loaded DMRS) is located does not allow URLLC service to seize; URLLC traffic is allowed to preempt on a symbol set where other reference signals are located, for example, a symbol set where an additional DMRS (demodulation reference signal), a Phase noise reference signal (PT-RS) and a Channel state information reference signal (CSI-RS) are located. Because the preposed data demodulation reference signal usually only occupies 1 to 2 symbols, and the URLLC service can normally occupy the data area in each downlink unit transmission unit of the eMBB service, the time delay influence on the URLLC service during the occupation can be ensured to be as small as possible. In addition, the preamble data demodulation reference signal can be used for demodulation of the eMMC user equipment, and symbol resources occupied by the preamble data demodulation reference signal are guaranteed not to be occupied by the URLLC service, so that the eMMC user equipment can be guaranteed to demodulate normally, and the performance of the eMMC service under a preemption scene is guaranteed.
Fig. 3 is a schematic structural diagram of a service preemption device according to an embodiment of the present invention.
The service preemption device 30 in this embodiment may be used on the base station side.
The service preemption device 30 shown in fig. 3 may include: a preemption module 301 and a URLLC service data transmission module 302.
The preemption module 301 is adapted to, when the URLLC service preempts the eMBB service, schedule the URLLC service to preempt on a symbol resource other than a preemption-prohibited symbol set in each downlink unit transmission unit of the eMBB service, where the preemption-prohibited symbol set is pre-configured.
The URLLC traffic data transmitting module 302 is adapted to transmit URLLC traffic data using the preempted symbol resources.
When the embodiment of the invention sends the resource preemption indicating information, because the preempted symbol resource can not prohibit the preemption of the symbol resource in the symbol set, the symbol resource set which can be preempted in each downlink unit transmission unit is reduced, and the bit number occupied by the resource preemption indicating information is also reduced, thereby reducing the signaling overhead.
Preferably, the time length of the downlink unit transmission unit of the eMBB service is the same as or different from the time length of the downlink unit transmission unit of the URLLC service
Preferably, the set of preemptive inhibiting symbols includes at least the symbol resources occupied by the preamble demodulation reference signal.
For more details on the working principle and the working mode of the service preemption device 30, reference may be made to the related descriptions in fig. 1 to fig. 2, and details are not described here again.
Fig. 4 is a schematic structural diagram of a service preemption device according to an embodiment of the present invention.
The service preemption device 40 shown in fig. 4 may include: a preemption module 402 and a URLLC service data transmission module 403.
The specific implementation of the preemption module 402 and the URLLC service data sending module 403 can refer to the preemption module 301 and the URLLC service data sending module 302 shown in fig. 3, and details are not described here.
Preferably, the service preemption device 40 shown in fig. 4 may further include a preemption indicating module 404, and the preemption indicating module 404 is adapted to send resource preemption indicating information to the eMBB user equipment to notify the eMBB user equipment of the position of the preempted symbol resource.
Further, after receiving the resource preemption indication information, the eMBB user equipment clears the data bit log-likelihood ratio carried on the preempted symbol resources.
Preferably, the preemption indicating module 404 may include a determining unit 4041 and a sending unit 4042. A determining unit 4041 is adapted to determine a first frequency resource location of the eMBB user equipment on the preempted symbol resource and a second frequency resource location of the URLLC traffic data on the preempted symbol resource; the sending unit 4042 is adapted to send the resource preemption indication information to the eMBB user equipment if there is coincidence between the first frequency resource location and the second frequency resource location.
Preferably, the service preemption device 40 shown in fig. 4 may further include a location sending module 401, and the location sending module 401 is adapted to send the locations of all symbol resources in the prohibited symbol set to the eMBB user equipment.
Further, the number of bits occupied by the resource preemption indication information is equal to: and the difference between the total number of the symbol resources occupied by the downlink unit transmission unit of the eMBB service and the total number of all the symbol resources in the symbol set prohibited from being seized.
For more details on the operation principle and the operation mode of the service preemption device 40, reference may be made to the relevant descriptions in fig. 1 to fig. 3, and details are not described here.
The embodiment of the present invention also discloses a base station, where the base station may include the service preemption device 30 shown in fig. 3 or the service preemption device 40 shown in fig. 4. The base station can execute URLLC service to seize eMBB service, and simultaneously ensures the performance of the URLLC service and the eMBB service.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (15)

1. A method for seizing a service, comprising:
when a URLLC service seizes an eMMC service, scheduling the URLLC service on symbol resources except a seizing-prohibiting symbol set for seizing in each downlink unit transmission unit of the eMMC service, wherein the seizing-prohibiting symbol set is configured in advance, and at least comprises the symbol resources occupied by a preposed data demodulation reference signal;
and transmitting URLLC service data by using the preempted symbol resources.
2. The method for service preemption of claim 1, further comprising:
and sending resource preemption indication information to eMB user equipment to inform the eMB user equipment of the position of the preempted symbol resource.
3. The method of claim 2, wherein the sending resource preemption indication information to an eMBB user equipment comprises:
determining a first frequency resource position of the eMBB user equipment on the preempted symbol resource and a second frequency resource position of the URLLC service data on the preempted symbol resource;
and if the first frequency resource position and the second frequency resource position are overlapped, sending the resource preemption indication information to the eMBB user equipment.
4. The method of claim 2, wherein said scheduling said URLLC service for preemption on symbol resources outside of a set of prohibited preemption symbols further comprises:
and sending the positions of all symbol resources in the prohibition preemption symbol set to the eMBB user equipment.
5. The method according to claim 4, wherein the number of bits occupied by said resource preemption indication information is equal to: and the difference between the total number of the symbol resources occupied by the downlink unit transmission unit of the eMBB service and the total number of all the symbol resources in the symbol set prohibited from being seized.
6. The service preemption method of claim 2, wherein the eMB user equipment clears the data bit log-likelihood ratio carried on the preempted symbol resources after receiving the resource preemption indication information.
7. The traffic preemption method of any one of claims 1-6, wherein the time length of the downlink unit transmission unit of the eMBB traffic is the same as or different from the time length of the downlink unit transmission unit of the URLLC traffic.
8. A service preemption device, comprising:
a preemption module adapted to, when a URLLC service preempts an eMBB service, schedule the URLLC service to preempt on a symbol resource other than a preemption-prohibited symbol set in each downlink unit transmission unit of the eMBB service, where the preemption-prohibited symbol set is pre-configured and includes at least a symbol resource occupied by a preamble demodulation reference signal;
and the URLLC service data sending module is suitable for sending the URLLC service data by utilizing the occupied symbol resources.
9. The traffic preemption device of claim 8, further comprising:
and the preemption indicating module is suitable for sending resource preemption indicating information to the eMB user equipment so as to inform the eMB user equipment of the position of the preempted symbol resource.
10. The traffic preemption device of claim 9, wherein the preemption instructing module comprises:
a determining unit adapted to determine a first frequency resource location of the eMBB user equipment on the preempted symbol resource and a second frequency resource location of the URLLC traffic data on the preempted symbol resource;
a sending unit, adapted to send the resource preemption indication information to the eMBB user equipment if there is a coincidence between the first frequency resource location and the second frequency resource location.
11. The traffic preemption device of claim 9, further comprising:
a position sending module adapted to send positions of all symbol resources in the preemptive-prohibited symbol set to the eMBB user equipment.
12. The service preemption device of claim 11, wherein the number of bits occupied by the resource preemption indication information is equal to: and the difference between the total number of the symbol resources occupied by the downlink unit transmission unit of the eMBB service and the total number of all the symbol resources in the symbol set prohibited from being seized.
13. The traffic preemption device of claim 9, wherein the eMBB user equipment clears the data bit log-likelihood ratio carried on the preempted symbol resources after receiving the resource preemption indication information.
14. The traffic preemption device of any one of claims 8-13, wherein the time length of the downlink unit transmission unit of the emblc traffic is the same as or different from the time length of the downlink unit transmission unit of the URLLC traffic.
15. A base station comprising service preemption means as claimed in any one of claims 8 to 13.
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