CN108271231A - A kind of switching method and equipment of wireless data unit RDU - Google Patents

A kind of switching method and equipment of wireless data unit RDU Download PDF

Info

Publication number
CN108271231A
CN108271231A CN201611264143.9A CN201611264143A CN108271231A CN 108271231 A CN108271231 A CN 108271231A CN 201611264143 A CN201611264143 A CN 201611264143A CN 108271231 A CN108271231 A CN 108271231A
Authority
CN
China
Prior art keywords
rdu
target
source
channel quality
message
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN201611264143.9A
Other languages
Chinese (zh)
Inventor
马洁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN201611264143.9A priority Critical patent/CN108271231A/en
Priority to PCT/CN2017/114494 priority patent/WO2018121189A1/en
Publication of CN108271231A publication Critical patent/CN108271231A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1221—Wireless traffic scheduling based on age of data to be sent
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H04W36/142—Reselecting a network or an air interface over the same radio air interface technology
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/304—Reselection being triggered by specific parameters by measured or perceived connection quality data due to measured or perceived resources with higher communication quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Landscapes

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

Abstract

A kind of RDU switching methods and equipment, to realize that UE is rapidly switched to target RDU from source RDU, reduce UE from source RDU switch to target RDU during data transmission interruption time delay.Method includes：Source RDU receives the first channel quality of reported by user equipment UE and second channel quality of source RDU services；Source RDU is determining that the first channel quality and second channel quality meet preset condition, and determine the resource of target RDU for when being dispatched by source RDU, source RDU sends first message to UE, and send second message to target RDU, first message is used to indicate UE and switches to target RDU from source RDU, second message is used to indicate the resource of the target RDU of source RDU scheduling, and the resource of target RDU is used for the target RDU and UE during UE switches to target RDU from source RDU and carries out data transmission.

Description

Switching method and device of wireless data unit RDU
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a method and an apparatus for switching a wireless data unit RDU.
Background
The wireless communication network includes two types of network units, which are a Radio Control Unit (RCU) and a Radio Data Unit (RDU). The RCU is responsible for controlling User Equipment (UE) to access a network, allocating resources for the UE and establishing a bearer between the UE and a core network; the RDU is responsible for providing a physical air interface wireless link and scheduling resources in real time to realize interaction of data and signaling with the UE.
When the UE moves from the coverage area of one RDU to the coverage area of another RDU, the channel quality of the UE and the another RDU gradually becomes better due to the gradual deterioration of the channel quality of the UE and the one RDU, and the UE needs to be switched from the one RDU to the another RDU. The RDU serving the UE before the UE is handed over is generally referred to as a source RDU, and the RDU serving the UE after the UE is handed over is generally referred to as a target RDU.
For a scenario that the UE is switched from the source RDU to the target RDU, the 5G network needs to control the interruption delay of data transmission in the process that the UE is switched from the source RDU to the target RDU within a range of 100 microseconds, and no RDU switching scheme capable of meeting such a need of the 5G network is defined in the current standard.
Disclosure of Invention
The embodiment of the invention provides a switching method and equipment of RDUs (remote data units), which are used for realizing the rapid switching of UE (user equipment) from a source RDU to a target RDU and reducing the interruption time delay of data transmission in the process of switching the UE from the source RDU to the target RDU.
In a first aspect, a method for switching an RDU provided in an embodiment of the present invention includes:
a source RDU receives a first channel quality and a second channel quality reported by UE served by the source RDU, wherein the first channel quality refers to the quality of a channel between the UE and the source RDU, and the second channel quality refers to the quality of a channel between the UE and a target RDU;
when the source RDU determines that the first channel quality and the second channel quality meet preset conditions and determines that resources of the target RDU are used for being scheduled by the source RDU, the source RDU sends a first message to the UE and sends a second message to the target RDU, the first message is used for indicating that the UE is switched from the source RDU to the target RDU, the second message is used for indicating the resources of the target RDU scheduled by the source RDU, and the resources of the target RDU are used for carrying out data transmission between the target RDU and the UE in the process that the UE is switched from the source RDU to the target RDU.
In the method, in the process of switching the UE from the source RDU to the target RDU, the resource of the target RDU is used for being scheduled by the source RDU, and the resource of the target RDU scheduled by the source RDU is used for data transmission between the target RDU and the UE, so that in the process of switching the UE from the source RDU to the target RDU, the data transmission between the target RDU and the UE can be ensured by the method, the interruption time delay of the data transmission in the process of switching the UE from the source RDU to the target RDU is reduced to the minimum, and the requirement of the interruption time delay of the data transmission for RDU switching in a 5G network can be met. If the prior art is adopted, in the process of switching the UE from the source RDU to the target RDU, the resources of the target RDU are only used for being scheduled by the target RDU, and under the condition that the resources of the target RDU are in shortage, the data transmission between the target RDU and the UE has a long interruption delay, and the requirement of the interruption delay of the data transmission for switching the RDU in the 5G network cannot be met by adopting the prior art.
In a possible implementation manner, before the source RDU sends the second message to the target RDU, the source RDU determines, according to the second channel quality, resources of the target RDU scheduled by the source RDU.
The determining, by the source RDU, the resource of the target RDU scheduled by the source RDU according to the second channel quality refers to determining, by the source RDU, the resource of the target RDU used for data transmission between the target RDU and the UE according to the second channel quality in the process of switching the UE from the source RDU to the target RDU. The method for determining the resource of the target RDU for data transmission between the target RDU and the UE by the source RDU according to the second channel quality is the same as the method for determining the resource of the target RDU for data transmission between the target RDU and the UE by the target RDU according to the second channel quality in the prior art.
In this way, the source RDU may determine the resource of the target RDU scheduled by the source RDU according to the second channel quality, and then the source RDU may indicate the resource of the target RDU scheduled by the source RDU in the second message sent to the target RDU.
In a possible implementation manner, the method further includes:
in the process that the UE is switched from the source RDU to the target RDU, when the source RDU fails to send data to the UE, the source RDU schedules the target RDU to send the failed data to the UE through a mirror image of a Media Access Control (MAC) entity of the source RDU, which is established on the target RDU.
The configuration information of the mirror image of the MAC entity of the source RDU established on the target RDU is the same as the configuration information of the MAC entity of the source RDU, the mirror image of the MAC entity of the source RDU established on the target RDU has the same function as the MAC entity of the source RDU, and the mirror image of the MAC entity of the source RDU established on the target RDU is controlled by the source RDU.
Further, the application scope of the mirror image of the MAC entity of the source RDU established by the target RDU may be defined. For example, the mirror image of the MAC entity of the source RDU established by the target RDU is bound with the UE information, which indicates that the mirror image of the MAC entity of the source RDU established by the target RDU is applied to the RDU switching process of the UE indicated by the bound UE information, so that the target RDU transmits data to the UE through the established mirror image of the MAC entity of the source RDU in the process of switching the UE from the source RDU to the target RDU.
In this way, the target RDU can obtain the data failed to be sent to the UE by the source RDU through the mirror image of the MAC entity of the source RDU established on the target RDU, so that the source RDU can accurately reserve resources required for sending the failed data to the UE, thereby avoiding resource waste caused by inaccurate resource reservation, and simultaneously reducing the interruption time delay of data transmission to the minimum in the process of switching the UE from the source RDU to the target RDU.
In one possible implementation manner, the preset condition includes:
the difference between the second channel quality and the first channel quality is greater than a first threshold; and/or the presence of a gas in the gas,
the first channel quality is less than a second threshold, and the second channel quality is greater than a third threshold.
Therefore, the first channel quality and the second channel quality meet the preset conditions, which indicates that the UE receives a weaker signal from the source RDU and a better signal from the target RDU, and the target RDU and the UE can perform normal communication, such as voice call, video download and the like, so that the UE is suitable to be switched to the target RDU.
In a possible implementation manner, the resource of the target RDU includes a time domain resource of the target RDU and/or a frequency domain resource of the target RDU.
In a possible implementation manner, in the process of switching the UE from the source RDU to the target RDU, when the resource used by the target RDU for transmission with other UEs is the same resource as the resource of the target RDU scheduled by the source RDU, the same resource should be preferentially used for scheduling by the source RDU.
Therefore, the resource of the target RDU can be scheduled by the source RDU preferentially in the process of switching the UE from the source RDU to the target RDU, the data transmission between the target RDU and the UE is further ensured, and the interruption time delay of the data transmission in the process of switching the UE from the source RDU to the target RDU is reduced to the minimum.
In a second aspect, an RDU switching method provided in an embodiment of the present invention includes:
a target RDU receives a message sent by a source RDU, wherein the message is used for indicating the resource of the target RDU scheduled by the source RDU, and the resource of the target RDU is used for data transmission between the target RDU and the UE in the process that the UE is switched from the source RDU to the target RDU;
and in the process that the UE is switched from the source RDU to the target RDU, the target RDU performs data transmission with the UE through the resource of the target RDU indicated by the message, wherein the resource of the target RDU is used for being scheduled by the source RDU.
In the method, in the process of switching the UE from the source RDU to the target RDU, the resource of the target RDU is used for being scheduled by the source RDU, and the resource of the target RDU scheduled by the source RDU is used for data transmission between the target RDU and the UE, so that in the process of switching the UE from the source RDU to the target RDU, the data transmission between the target RDU and the UE can be ensured by the method, the interruption time delay of the data transmission in the process of switching the UE from the source RDU to the target RDU is reduced to the minimum, and the requirement of the interruption time delay of the data transmission for RDU switching in a 5G network can be met. If the prior art is adopted, in the process of switching the UE from the source RDU to the target RDU, the resources of the target RDU are only used for being scheduled by the target RDU, and under the condition that the resources of the target RDU are in shortage, the data transmission between the target RDU and the UE has a long interruption delay, and the requirement of the interruption delay of the data transmission for switching the RDU in the 5G network cannot be met by adopting the prior art.
In a possible implementation manner, before the target RDU receives the message sent by the source RDU, the target RDU reserves set resources, where the set resources are used for data transmission between the target RDU and the UE in a process that the UE is scheduled by the source RDU and is switched from the source RDU to the target RDU.
In this way, the target RDU sets resources by reservation, and the reserved resources are used for being scheduled by the source RDU, so that data transmission between the target RDU and the UE can be further ensured in the process of switching the UE from the source RDU to the target RDU, and further, the interruption time delay of data transmission in the process of switching the UE from the source RDU to the target RDU is reduced to the minimum. And in the case that no UE is switched to the target RDU, allowing the target RDU to use the reserved set resources.
In a possible implementation manner, the method further includes:
the target RDU establishes a mirror image of a Media Access Control (MAC) entity of the source RDU;
in the process that the UE is switched from the source RDU to the target RDU, when the source RDU fails to send data to the UE, the target RDU is scheduled by the source RDU through the mirror image of the MAC entity of the source RDU, and the source RDU sends the failed data to the UE.
In this way, the target RDU can obtain the data failed to be sent to the UE by the source RDU through the mirror image of the MAC entity of the source RDU established on the target RDU, so that the source RDU can accurately reserve resources required for sending the failed data to the UE, thereby avoiding resource waste caused by inaccurate resource reservation, and simultaneously reducing the interruption time delay of data transmission to the minimum in the process of switching the UE from the source RDU to the target RDU.
In a possible implementation manner, the resource of the target RDU includes a time domain resource of the target RDU and/or a frequency domain resource of the target RDU.
In a third aspect, a method for switching an RDU according to an embodiment of the present invention includes:
user Equipment (UE) reports a first channel quality and a second channel quality to a source RDU (remote data unit) serving for the UE, wherein the first channel quality refers to the quality of a channel between the UE and the source RDU, the second channel quality refers to the quality of a channel between the UE and a target RDU, and the first channel quality and the second channel quality are used for the source RDU to determine that the UE is switched from the source RDU to the target RDU;
the UE receives a message sent by the source RDU, wherein the message is used for indicating the UE to be switched from the source RDU to the target RDU;
and the UE is switched from the source RDU to the target RDU according to the received message, and the source RDU is used for scheduling the target RDU and the UE to carry out data transmission in the process of switching the UE from the source RDU to the target RDU.
In the method, in the process of switching the UE from the source RDU to the target RDU, the resource of the target RDU is used for being scheduled by the source RDU, and the resource of the target RDU scheduled by the source RDU is used for data transmission between the target RDU and the UE, so that in the process of switching the UE from the source RDU to the target RDU, the data transmission between the target RDU and the UE can be ensured by the method, the interruption time delay of the data transmission in the process of switching the UE from the source RDU to the target RDU is reduced to the minimum, and the requirement of the interruption time delay of the data transmission for RDU switching in a 5G network can be met. If the prior art is adopted, in the process of switching the UE from the source RDU to the target RDU, the resources of the target RDU are only used for being scheduled by the target RDU, and under the condition that the resources of the target RDU are in shortage, the data transmission between the target RDU and the UE has a long interruption delay, and the requirement of the interruption delay of the data transmission for switching the RDU in the 5G network cannot be met by adopting the prior art.
In a fourth aspect, a source RDU provided in an embodiment of the present invention includes:
a transceiver unit, configured to receive a first channel quality and a second channel quality reported by a user equipment UE served by the source RDU, where the first channel quality refers to a quality of a channel between the UE and the source RDU, and the second channel quality refers to a quality of a channel between the UE and a target RDU;
a processing unit, configured to determine that the first channel quality and the second channel quality received by the transceiver unit satisfy a preset condition, and determine that resources of the target RDU are used for being scheduled by the source RDU, where the resources of the target RDU are used for performing data transmission between the target RDU and the UE in a process that the UE is switched from the source RDU to the target RDU;
the transceiver unit is further configured to send a first message to the UE and send a second message to the target RDU when the processing unit determines that the first channel quality and the second channel quality satisfy the preset condition and determines that the resource of the target RDU is used to be scheduled by the source RDU, where the first message is used to instruct the UE to switch from the source RDU to the target RDU, and the second message is used to instruct the resource of the target RDU scheduled by the source RDU.
In one possible implementation, the processing unit is further configured to:
and determining the resources of the target RDU scheduled by the source RDU according to the second channel quality before the transceiver unit sends the second message to the target RDU.
In one possible implementation, the processing unit is further configured to:
in the process that the UE is switched from the source RDU to the target RDU, when the source RDU fails to send data to the UE, the transceiver unit is controlled to schedule the target RDU to send the failed data to the UE through a mirror image of a Media Access Control (MAC) entity of the source RDU, which is established on the target RDU.
In one possible implementation, the preset conditions include:
the difference between the second channel quality and the first channel quality is greater than a first threshold; and/or the presence of a gas in the gas,
the first channel quality is less than a second threshold, and the second channel quality is greater than a third threshold.
In one possible implementation, the resources of the target RDU include time domain resources of the target RDU and/or frequency domain resources of the target RDU.
In a fifth aspect, a source RDU provided in an embodiment of the present invention includes: a processor, a memory, and a transceiver;
the transceiver is used for receiving and transmitting data;
the memory is to store instructions;
the processor is configured to execute the instructions in the memory to perform the method provided by the first aspect.
In a sixth aspect, an embodiment of the present invention further provides a computer storage medium for storing computer software instructions for the source RDU in the above aspect, which includes a program for executing the program designed in the above aspect.
In a seventh aspect, an embodiment of the present invention provides a target RDU, including:
a transceiver unit, configured to receive a message sent by a source RDU, where the message is used to indicate a resource of a target RDU scheduled by the source RDU, and the resource of the target RDU is used for data transmission between the target RDU and the UE in a process where the UE switches from the source RDU to the target RDU;
a processing unit, configured to control, during a process that the UE switches from the source RDU to the target RDU, the transceiver unit to perform data transmission with the UE through the resource of the target RDU indicated by the message received by the transceiver unit, where the resource of the target RDU is used to be scheduled by the source RDU;
the transceiver unit is further configured to perform data transmission with the UE through resources of the target RDU in a process that the UE is switched from the source RDU to the target RDU.
In one possible implementation, the processing unit is further configured to:
and reserving set resources before the transceiver unit receives the message sent by the source RDU, wherein the set resources are used for data transmission between the target RDU and the UE in the process that the UE is switched from the source RDU to the target RDU by the scheduling of the source RDU.
In one possible implementation, the processing unit is further configured to:
establishing a mirror image of a Media Access Control (MAC) entity of the source RDU on the target RDU;
in the process that the UE is switched from the source RDU to the target RDU, when the source RDU fails to send data to the UE, the source RDU schedules the source RDU through the mirror image of the MAC entity of the source RDU, and the transceiver unit is controlled to send the data which are failed to be sent by the source RDU to the UE.
In one possible implementation, the resources of the target RDU include time domain resources of the target RDU and/or frequency domain resources of the target RDU.
In an eighth aspect, an embodiment of the present invention provides a target RDU, including: a processor, a memory, and a transceiver;
the transceiver is used for receiving and transmitting data;
the memory is to store instructions;
the processor is used for executing the instructions in the memory and executing the method provided by the second aspect.
In a ninth aspect, an embodiment of the present invention further provides a computer storage medium for storing computer software instructions for a target RDU in the above aspect, which includes a program for executing the program designed in the above aspect.
In a tenth aspect, an embodiment of the present invention provides a UE, including:
a transceiver unit, configured to report a first channel quality and a second channel quality to a source RDU serving the UE, where the first channel quality refers to a quality of a channel between the UE and the source RDU, the second channel quality refers to a quality of a channel between the UE and the target RDU, and the first channel quality and the second channel quality are used for the source RDU to determine that the UE is switched from the source RDU to the target RDU;
the transceiver unit is further configured to receive a message sent by the source RDU, where the message is used to instruct the UE to switch from the source RDU to the target RDU;
and the processing unit is used for switching the UE from the source RDU to the target RDU according to the message received by the transceiver unit, and in the process of switching the UE from the source RDU to the target RDU, the source RDU is used for scheduling the target RDU and the UE to carry out data transmission.
In an eleventh aspect, an embodiment of the present invention provides a UE, including: a processor, a memory, and a transceiver;
the transceiver is used for receiving and transmitting data;
the memory is to store instructions;
the processor is configured to execute the instructions in the memory and perform the method provided by the third aspect.
In a twelfth aspect, an embodiment of the present invention further provides a computer storage medium for storing computer software instructions for the UE in the above aspects, which includes a program for executing the program designed in the above aspects.
Drawings
FIG. 1A is a schematic diagram of an access network architecture of 5G;
FIG. 1B is a schematic diagram of a 5G network deployment;
fig. 2 is a schematic flow chart of a switching method of an RDU according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a downlink data transmission method applied in a process of switching a UE from a source RDU to a target RDU according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a source RDU according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another source RDU according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a target RDU according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of another target RDU according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a UE according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of another UE according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The switching method and the switching device for the RDUs provided by the embodiment of the invention can realize the rapid switching of the UE from the source RDU to the target RDU and reduce the interruption time delay of data transmission in the process of switching the UE from the source RDU to the target RDU. The technical scheme provided by the embodiment of the invention is particularly suitable for a scene that the UE is rapidly switched from the source RDU to the target RDU in the 5G network, and can control the interruption time delay of data transmission within a range of 100 microseconds aiming at the process that the UE is switched from the source RDU to the target RDU in the 5G network. The method and the device are based on the same inventive concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the RDU and the method can be referred to each other, and repeated parts are not described again.
The UE switching from the source RDU to the target RDU means that when the UE moves from the coverage area of the signal of one RDU to the coverage area of the signal of another RDU, the channel quality of the UE and the another RDU gradually becomes better due to the gradual deterioration of the channel quality of the UE and the one RDU, and the UE needs to switch from the one RDU to the another RDU; the RDU serving the UE before the UE is handed over is generally referred to as a source RDU, and the RDU serving the UE after the UE is handed over is generally referred to as a target RDU.
In a wireless network, for example, a 5G network, the RCU is responsible for controlling the UE to access the network, allocating resources to the UE, and establishing a bearer between the UE and a core network; the RDU is responsible for providing a physical air interface wireless link and scheduling resources in real time to realize interaction of data and signaling with the UE.
Fig. 1A is a schematic diagram of an access network architecture of 5G, and fig. 1A includes class 2 network elements, which are an RCU and an RDU, respectively. The RCU is provided with a Protocol stack entity of an access layer, and the Protocol stack entity comprises a Radio Resource Control (RRC) entity and a Packet Data Convergence Protocol (PDCP) entity; the RDU has protocol stack entities of an Access Layer, including a Radio Link Control (RLC) entity, a Media Access Control (MAC) entity, and a Physical Layer (PHY) entity. In fig. 1A, communications between the RCU and the Core Network (CN), between the RCU and the RDU, and between the device and the UE are performed through transceivers as shown in fig. 1A, respectively.
Fig. 1B is a schematic deployment diagram of a 5G network, where multiple RDUs are connected below one RCU in fig. 1B, multiple antenna transmission points are located below one RDU, and F1 and F2 are the antenna transmission points of the RDUs. Among them, the frequency of F1 is a low band, so the coverage area of F1 is large, and the frequency of F2 is a high band, so the coverage area of F2 is small. The coverage area of F2 shown in fig. 1B is within the coverage area of F1, so that F2 absorbs more traffic for hot spots, and further meets the traffic demand of dense traffic areas such as shopping malls or subway stations.
The following detailed description of various embodiments of the invention refers to the accompanying drawings. It should be noted that the display sequence of the embodiment of the present invention only represents the sequence of the embodiment, and does not represent the merits of the technical solutions provided by the embodiments.
Example one
The embodiment of the invention provides a switching method of RDUs (remote data units), which is suitable for a scene that UE (user equipment) is switched from a source RDU to a target RDU. As shown in fig. 2, in the RDU switching method provided in the embodiment of the present invention, an interaction flow among the UE, the source RDU, and the target RDU is as follows:
s201, the UE reports the first channel quality and the second channel quality to the source RDU.
The first channel quality refers to the quality of a channel between the UE and the source RDU, and the second channel quality refers to the quality of a channel between the UE and the target RDU.
Before the UE is switched from the source RDU to the target RDU, the UE is located in a signal coverage area of the source RDU, and the UE establishes an RRC link with the RCU through the source RDU, so that the source RDU provides service for the UE. When the UE moves to an overlapping area between a coverage area of a signal of the source RDU and a coverage area of a signal of the target RDU, the UE may receive the signal of the source RDU as well as the signal of the target RDU. As the UE gradually moves away from the source RDU and gradually approaches the target RDU, the quality of a first channel between the UE and the source RDU gradually becomes worse, and the quality of a second channel between the UE and the target RDU gradually becomes better. The UE may measure the first channel quality and the second channel quality, and report the measured first channel quality and second channel quality to the source RDU, so that the RDU determines whether the UE may be switched from the source RDU to the target RDU according to the channel quality. The UE is switched from the source RDU to the target RDU, namely the UE establishes an RRC link with the RCU through the source RDU and is switched into the UE establishes the RRC link with the RCU through the target RDU, and the target RDU provides service for the UE after the UE is switched.
It should be noted that the information reported by the UE to the source RDU includes, but is not limited to, the first channel quality and the second channel quality. In this embodiment, the UE may report to the source RDU according to the indication of the source RDU, so that the RDU determines whether the UE can be switched from the source RDU to the target RDU according to the information reported by the UE.
S202, the source RDU determines that the first channel quality and the second channel quality meet preset conditions, and determines that the resource of the target RDU is used for being scheduled by the source RDU.
In S202, the first channel quality and the second channel quality satisfy the preset condition, which indicates that the UE receives a weaker signal from the source RDU and receives a better signal from the target RDU, so that the UE is suitable for switching to the target RDU. For example, the preset conditions include: the difference between the second channel quality and the first channel quality is larger than a first threshold, which may be set, for example, to 3dB or 6 dB. For another example, the preset conditions include: the first channel quality is smaller than a second threshold, the second channel quality is larger than a third threshold, the second threshold and the third threshold can be set, the first signal quality and the second signal quality are limited by setting the second threshold and the third threshold, so that when the first channel quality is smaller than the second threshold, the source RDU and the UE cannot normally communicate, when the second channel quality is larger than the third threshold, the target RDU and the UE can normally communicate, and the communication between the RDU and the UE can be voice call, video download and the like.
The resource of the target RDU is used for being scheduled by the source RDU in S202 means that in the process of switching the UE from the source RDU to the target RDU, the resource of the target RDU is used for being scheduled by the source RDU, and the resource of the target RDU scheduled by the source RDU is used for data transmission between the target RDU and the UE. If the prior art is adopted, in the process of switching the UE from the source RDU to the target RDU, the resources of the target RDU are only used for being scheduled by the target RDU, and the data transmission between the target RDU and the UE is interrupted for a long time under the condition that the resources of the target RDU are in shortage. Therefore, in this embodiment, the source RDU may schedule resources of the target RDU in the process of switching the UE from the source RDU to the target RDU, so as to ensure that the target RDU and the UE can perform data transmission, and minimize an interruption delay of data transmission in the process of switching the UE from the source RDU to the target RDU.
Preferably, in the process of switching the UE from the source RDU to the target RDU, when the resource used for transmission between the target RDU and the other UEs is the same resource as the resource of the target RDU scheduled by the source RDU, the same resource should be preferentially used for scheduling by the source RDU, so that the resource of the target RDU can be scheduled by the source RDU in the process of switching the UE from the source RDU to the target RDU, and further, data transmission between the target RDU and the UE can be ensured, and the interruption delay of data transmission in the process of switching the UE from the source RDU to the target RDU is minimized.
The resource of the target RDU may be a time domain resource of the target RDU, or may be a frequency domain resource of the target RDU.
After performing S202, the source RDU may determine that the UE may be handed over from the source RDU to the target RDU, and ensure that the target RDU and the UE are capable of data transmission during the handover of the UE from the source RDU to the target RDU, so as to minimize interruption of data transmission during the handover of the UE from the source RDU to the target RDU.
In this embodiment, the source RDU may obtain a handover criterion from the RCU in advance, and the handover criterion side is used to determine whether the UE may handover from the source RDU to the target RDU. The switching criterion includes the preset condition in S202 and the resource used to indicate the target RDU is used to be scheduled by the source RDU, and the switching criterion side may indicate which RDU resources are used to be scheduled by the source RDU. For example, the preset condition may be that a difference between the second channel quality and the first channel quality is greater than a set threshold, or that the first channel quality is greater than a second threshold, where the second threshold is greater than a third threshold.
Optionally, the handover quasi-side further includes other information. For example, the handover quasi-side further includes a load threshold, and if the actual load of the target RDU is greater than the load threshold, the source RDU determines that the UE may not be handed over from the source RDU to the target RDU. For another example, the switch-ready side may also indicate which RDUs the resources of the source RDU are to be scheduled by. For another example, the handover quasi-side may further include a maximum allowed rate of the UE, which is used for the source RDU to determine resources of the target RDU required for data transmission between the target RDU and the UE.
S203, the source RDU sends a first message to the UE, and sends a second message to the target RDU.
The first message is used for indicating the UE to be switched from the source RDU to the target RDU; the second message is used for indicating the resource of the target RDU scheduled by the source RDU, and the resource of the target RDU scheduled by the source RDU is used for data transmission between the target RDU and the UE in the process that the UE is switched from the source RDU to the target RDU.
Optionally, before the source RDU sends the second message to the target RDU at S203, the source RDU may determine the resource of the target RDU scheduled by the source RDU according to the second channel quality. Determining the resource of the target RDU scheduled by the source RDU according to the second channel quality means determining the resource of the target RDU used for data transmission between the target RDU and the UE according to the second channel quality in the process that the UE is switched from the source RDU to the target RDU. Determining the resource of the target RDU scheduled by the source RDU according to the second channel quality is prior art, except that in prior art, the target RDU determines the resource of the target RDU for data transmission between the target RDU and the UE according to the second channel quality, but in this embodiment, the source RDU determines the resource of the target RDU for data transmission between the target RDU and the UE according to the second channel quality. For the method for determining the resources of the target RDU for data transmission between the target RDU and the UE according to the second channel quality, although the present embodiment is different from the prior art, the present embodiment is the same as the prior art for determining the resources of the target RDU for data transmission between the target RDU and the UE according to the second channel quality. Therefore, in this embodiment, the method for determining, by the source RDU, the resource of the target RDU scheduled by the source RDU according to the quality of the second channel may refer to the prior art, and details are not described in this embodiment.
And S204, the UE switches from the source RDU to the target RDU according to the indication of the first message sent by the source RDU.
In the process of switching the UE from the source RDU to the target RDU, the UE may perform data transmission with the source RDU, or may perform data transmission with the target RDU under the scheduling of the source RDU. In the process of switching the UE from the source RDU to the target RDU, the process of data transmission between the UE and the source RDU is the same as that in the prior art, and is not described herein again; in the process of switching the UE from the source RDU to the target RDU, the UE performs a data transmission process with the target RDU under the scheduling of the source RDU, which is the process described in the data transmission method provided in this embodiment. After the UE is switched to the target RDU, the target RDU provides service for the UE, and after the UE is switched to the target RDU, the prior art is used, and details are not described here.
In the prior art, a source RDU also needs to send a message for instructing the UE to switch from the source RDU to a target RDU to the UE, where the message includes all parameters of the target RDU, and the UE performs data transmission with the target RDU according to all parameters of the target RDU in a process of switching from the source RDU to the target RDU, where the source RDU does not participate in the process. In this embodiment, the first message sent by the source RDU to the UE is only used to instruct the UE to switch from the source RDU to the target RDU, and the source RDU schedules the target RDU to perform data transmission with the UE in the process of switching the UE from the source RDU to the target RDU.
And S205, in the process of switching the UE from the source RDU to the target RDU, the target RDU performs data transmission with the UE through the resource of the target RDU scheduled by the source RDU according to the indication of the second message.
Optionally, the target RDU may also obtain the handover criterion from the RCU in advance, and the description on the handover criterion side may refer to the related content below S202, which is not described herein again. The switching criterion obtained by the target RDU may indicate which RDUs the resources of the target RDU are to be scheduled by, and which RDUs the resources of the target RDU are to be scheduled by.
In this embodiment, each RDU may reserve a set resource in its own resource, where the reserved set resource is used for being scheduled by other specified RDUs, and is used for performing data transmission with the UE in the process of switching the UE from other specified RDUs to itself, so as to further ensure that the UE can perform data transmission with the UE in the process of switching the UE from other specified RDUs to itself, and minimize interruption delay of data transmission in the process of switching the UE from the source RDU to the target RDU. Taking the example of reserving the set resource by the second device in the embodiment of the present invention, the set resource reserved by the second device is used for being scheduled by the source RDU, and is used for performing data transmission between the target RDU and the UE in a process of switching the UE from the source RDU to the target RDU. And in the case that no UE is switched to the target RDU, allowing the target RDU to use the reserved set resources.
The RDU switching method provided by the embodiment of the invention can realize the switching of the UE from the source RDU to the target RDU. In the process of switching the UE from the source RDU to the target RDU, because the resource of the target RDU is used for being scheduled by the source RDU, and the resource of the target RDU scheduled by the source RDU is used for data transmission between the target RDU and the UE, in the process of switching the UE from the source RDU to the target RDU, the method provided by the embodiment of the invention can ensure that the target RDU and the UE can carry out data transmission, and the interruption time delay of the data transmission in the process of switching the UE from the source RDU to the target RDU is reduced to the lowest, thereby meeting the requirement of the interruption time delay of the data transmission for RDU switching in a 5G network.
In order to further ensure that the target RDU can perform data transmission with the UE and minimize interruption time delay of data transmission in the process of switching the UE from the source RDU to the target RDU, the embodiment of the invention also provides a data transmission method, which is applied to the process of switching the UE from the source RDU to the target RDU. Fig. 3 shows a downlink data transmission method applied to a process of switching a UE from a source RDU to a target RDU in the embodiment of the present invention, where the method includes:
s301, the target RDU establishes the mirror image of the MAC entity of the source RDU.
In S301, the target RDU obtains the configuration parameter of the MAC entity of the source RDU from the source RDU, and then the target RDU establishes the mirror image of the MAC entity of the source RDU according to the configuration parameter of the MAC entity of the source RDU. Therefore, the configuration information of the mirror image of the MAC entity of the source RDU established on the target RDU is the same as the configuration information of the MAC entity of the source RDU, and the mirror image of the MAC entity of the source RDU established on the target RDU has the same function as the MAC entity of the source RDU. The mirror image of the MAC entity of the source RDU established on the target RDU is controlled by the source RDU.
Further, in this embodiment, an application range of the mirror image of the MAC entity of the source RDU established by the target RDU may be limited. For example, the mirror image of the MAC entity of the source RDU established by the target RDU is bound with the UE information, which indicates that the mirror image of the MAC entity of the source RDU established by the target RDU is applied to the RDU switching process of the UE indicated by the bound UE information, so that the target RDU transmits data to the UE through the established mirror image of the MAC entity of the source RDU in the process of switching the UE from the source RDU to the target RDU. The UE information includes the identity of the UE, the upper power limit of the UE, the service type of the UE, the minimum rate of the UE, the number of processes allowed by the UE and the like.
S302, in the process that the UE is switched from the source RDU to the target RDU, the source RDU sends data to the UE.
S302 specifically includes: in the process that the UE is switched from the source RDU to the target RDU, when the source RDU needs to send Data to the UE, an MAC entity of the source RDU generates a MAC Protocol Data Unit (PDU), the MAC PDU generates bit (bit) streams of at least two Redundancy versions (Redundancy Version, RV) after being coded in a physical layer, the source RDU sends the soft bit stream of one RV Version of the soft bit streams of the at least two RV versions to the UE, and then the source RDU sends the Data to the UE.
S303, when the UE fails to receive the data sent by the source RDU, the UE sends an error acknowledgement (NACK) instruction to the source RDU.
S304, the source RDU schedules the target RDU through the mirror image of the MAC entity of the source RDU established on the target RDU, and controls the target RDU to send the failed data to the UE sending source RDU.
S304 specifically includes: after the source RDU receives the NACK command sent by the UE, the source RDU indicates, through a mirror image of an MAC entity of the source RDU established on the target RDU, that the target RDU fails to send a redundant version of a bitstream to the UE through the source RDU, which indicates that the quality of a first channel between the UE and the source RDU is poor at this time. Under the condition that the quality of a second channel between the target RDU and the UE is good, the source RDU indicates the target RDU to send the bit stream of other redundancy versions to the UE through a mirror image of an MAC entity of the source RDU established on the target RDU, then the target RDU sends the bit stream of other redundancy versions to the UE, and further the target RDU retransmits failed data sent by the source RDU to the UE. And the UE carries out merging demodulation according to the data sent by the source RDU and the target RDU.
In the method, the target RDU can obtain the data failed to be sent to the UE by the source RDU through the mirror image of the MAC entity of the source RDU established on the target RDU, so that the source RDU can accurately reserve resources required for sending the failed data to the UE, thereby avoiding resource waste caused by inaccurate reserved resources, and simultaneously reducing the interruption time delay of data transmission to the minimum in the process of switching the UE from the source RDU to the target RDU.
Based on the same inventive concept as the method shown in fig. 3, for uplink data transmission in the process of switching the UE from the source RDU to the target RDU, because the target RDU establishes a mirror image of the MAC entity of the source RDU, both the source RDU and the target RDU can receive uplink data sent by the UE, the source RDU can merge the uplink data received by the source RDU and the target RDU, then the source RDU sends an Acknowledgement (ACK) instruction or a NACK instruction to the UE according to the merged uplink data reception state, and the target RDU does not need to send the ACK instruction or the NACK instruction to the UE.
In the data transmission method applied to the process of switching the UE from the source RDU to the target RDU, the source RDU and the target RDU cooperate with the UE to perform data transmission, and there is no interruption in the processing timing sequence of hybrid automatic Repeat Request (HARQ) of each data packet. The data transmission efficiency can be improved by cooperation between the source RDU and the target RDU and data transmission between the UE, the time and frequency diversity effect is achieved on the source RDU and the target RDU, and the effect is better especially for the scene with poor first channel quality of the source RDU and the UE.
Assume that in the prior art, a Multi-Service Aggregation (MAS) technology is adopted to implement a process of switching a UE from a source RDU to a target RDU, where the process includes: and when the source RDU provides service for the UE, the source RDU and the UE realize data transmission through the established communication link. In the process of switching the UE from the source RDU to the target RDU, the RCU indicates that a backup communication link is established between the target RDU and the UE, so that downlink data sent by the network can be transmitted to the UE through the source RDU and the target RDU respectively, and uplink data sent by the UE can be transmitted to the network through the source RDU and the target RDU respectively, so that the same data needs to be transmitted by using two resources, and further the resource utilization rate is low. In addition, establishing a backup communication link between the target RDU and the UE requires occupying a certain resource, which also results in a low resource utilization rate; a certain time is required for establishing a backup communication link between the target RDU and the UE, which further results in a long interruption delay of data transmission in the process of switching the UE from the source RDU to the target RDU, and thus the requirement of the 5G network for the interruption delay of data transmission for RDU switching cannot be met.
Example two
Based on the same inventive concept, the embodiment of the present invention further provides a source RDU, and the source RDU may execute the method on the source RDU side in the RDU switching method provided in the embodiment. Referring to fig. 4, the source RDU400 includes: a transceiving unit 401 and a processing unit 402. Wherein,
a transceiver unit 401, configured to receive a first channel quality and a second channel quality reported by a user equipment UE served by a source RDU400, where the first channel quality refers to a quality of a channel between the UE and the source RDU400, and the second channel quality refers to a quality of a channel between the UE and a target RDU;
a processing unit 402, configured to determine that the first channel quality and the second channel quality received by the transceiver unit 401 meet a preset condition, and determine that a resource of the target RDU is used for being scheduled by the source RDU400, where the resource of the target RDU is used for performing data transmission between the target RDU and the UE in a process that the UE is switched from the source RDU400 to the target RDU;
the transceiver unit 401 is further configured to send a first message to the UE and send a second message to the target RDU when the processing unit 402 determines that the first channel quality and the second channel quality meet the preset condition and determines that the resource of the target RDU is used to be scheduled by the source RDU400, where the first message is used to instruct the UE to switch from the source RDU400 to the target RDU, and the second message is used to instruct the resource of the target RDU scheduled by the source RDU 400.
Optionally, the processing unit 402 is further configured to:
before the transceiver unit 401 sends the second message to the target RDU, the resource of the target RDU scheduled by the source RDU400 is determined according to the second channel quality.
Optionally, the processing unit 402 is further configured to:
in the process of switching the UE from the source RDU400 to the target RDU, when the source RDU400 fails to send data to the UE, the control transceiver unit 401 schedules the target RDU to send the failed data to the UE sending source RDU400 through the mirror image of the media access control MAC entity of the source RDU400 established on the target RDU.
Optionally, the preset conditions include:
the difference between the second channel quality and the first channel quality is greater than a first threshold; and/or the presence of a gas in the gas,
the first channel quality is less than a second threshold and the second channel quality is greater than a third threshold.
Optionally, the resource of the target RDU includes a time domain resource of the target RDU and/or a frequency domain resource of the target RDU.
It should be noted that, for specific functional descriptions of the above units, reference may be made to an RDU switching method as shown in fig. 3, which is not described herein again. The division of the unit in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Based on the same inventive concept, an embodiment of the present invention further provides a source RDU, where the source RDU may execute the method on the source RDU side in the RDU switching method provided in the embodiment, and may be the same device as the source RDU shown in fig. 4. Referring to fig. 5, the source RDU500 includes: a processor 501, a transceiver 502, and a memory 503. Wherein,
the processor 501 is used for reading the program in the memory 503 and executing the following processes:
a processor 501, configured to receive, through the transceiver 502, a first channel quality and a second channel quality reported by a UE served by the source RDU500, where the first channel quality refers to a quality of a channel between the UE and the source RDU500, and the second channel quality refers to a quality of a channel between the UE and the target RDU;
the processor 501 is further configured to send a first message to the UE through the transceiver 502 and send a second message to the target RDU through the transceiver 502 when it is determined that the first channel quality and the second channel quality meet the preset condition and it is determined that the resource of the target RDU is used to be scheduled by the source RDU500400, where the first message is used to instruct the UE to switch from the source RDU500 to the target RDU, and the second message is used to instruct the resource of the target RDU scheduled by the source RDU 500.
Optionally, the processor 501 is further configured to:
the resources of the target RDU scheduled by the source RDU500400 are determined based on the second channel quality prior to sending the second message to the target RDU through the transceiver 502.
Optionally, the processor 501 is further configured to:
in the process of switching the UE from the source RDU500 to the target RDU, when the source RDU500 fails to send data to the UE, the target RDU is scheduled to send the failed data to the UE sending source RDU500 through the mirror image of the media access control MAC entity of the source RDU500400 established on the target RDU.
Optionally, the preset conditions include:
the difference between the second channel quality and the first channel quality is greater than a first threshold; and/or the presence of a gas in the gas,
the first channel quality is less than a second threshold and the second channel quality is greater than a third threshold.
Optionally, the resource of the target RDU includes a time domain resource of the target RDU and/or a frequency domain resource of the target RDU.
The memory 503 may store data used by the processor 501 in performing operations, and the memory 503 may be a memory of a physical host carrying the SDN controller, such as a hard disk, a usb disk, a Secure Digital (SD) card, and the like.
The present embodiment also provides a computer storage medium for storing computer software instructions for the source RDU of the above embodiments, which includes a program designed to execute the above embodiments.
Based on the same inventive concept, the embodiment of the present invention further provides a target RDU, and the target RDU may execute the method on the target RDU side in the RDU switching method provided in the embodiment. Referring to fig. 6, the target RDU600 includes: a transceiver 601 and a processing unit 602. Wherein,
a transceiver unit 601, configured to receive a message sent by a source RDU, where the message is used to indicate a resource of a target RDU600 scheduled by the source RDU, and the resource of the target RDU600 is used for data transmission between the target RDU600 and a UE in a process that the UE switches from the source RDU to the target RDU 600;
a processing unit 602, configured to control, through a resource of the target RDU600 indicated by the message received by the transceiver unit 601, the transceiver unit 601 to perform data transmission with the UE in a process that the UE switches from the source RDU to the target RDU600, where the resource of the target RDU600 is used for being scheduled by the source RDU;
the transceiver 601 is further configured to perform data transmission with the UE through the resource of the target RDU600 in a process that the UE is switched from the source RDU to the target RDU 600.
Optionally, the processing unit 602 is further configured to:
before the transceiver 601 receives the message sent by the source RDU, a set resource is reserved, and the set resource is used for data transmission between the target RDU600 and the UE in the process of switching the UE from the source RDU to the target RDU600 by the source RDU scheduling.
Optionally, the processing unit 602 is further configured to:
establishing a mirror image of a Media Access Control (MAC) entity of a source RDU on a target RDU 600;
in the process of switching the UE from the source RDU to the target RDU600, when the source RDU fails to transmit data to the UE, the source RDU schedules the MAC entity image of the source RDU, and controls the transceiver 601 to transmit the failed data to the UE.
Optionally, the resources of the target RDU600 include time domain resources of the target RDU600 and/or frequency domain resources of the target RDU 600.
It should be noted that, for specific functional descriptions of the above units, reference may be made to an RDU switching method as shown in fig. 3, which is not described herein again.
Based on the same inventive concept, an embodiment of the present invention further provides a target RDU700, where the target RDU700 may execute a method on the target RDU700 side in the RDU switching method provided in the embodiment, and may be the same device as the target RDU700 shown in fig. 6. Referring to fig. 7, the target RDU700 includes: a processor 701, a transceiver 702, and a memory 703. Wherein,
the processor 701 is configured to read the program in the memory 703 and execute the following processes:
a processor 701, configured to receive, by a transceiver 702, a message sent by a source RDU, where the message is used to indicate a resource of a target RDU700 scheduled by the source RDU, and the resource of the target RDU700 is used for data transmission between the target RDU700 and a UE in a process that the UE is switched from the source RDU to the target RDU 700;
the processor 701 is further configured to control data transmission with the UE through the transceiver 702 through the resource of the target RDU700 indicated by the message in the process of switching the UE from the source RDU to the target RDU700, where the resource of the target RDU700 is used for being scheduled by the source RDU.
Optionally, the processor 701 is further configured to:
before receiving a message sent by a source RDU through the transceiver 702, a set resource is reserved, where the set resource is used for data transmission between a target RDU700 and a UE in the process of switching the UE from the source RDU to the target RDU700 by the source RDU.
Optionally, the processor 701 is further configured to:
establishing a mirror image of a Media Access Control (MAC) entity of a source RDU on a target RDU 700;
in the process of switching the UE from the source RDU to the target RDU700, when the source RDU fails to send data to the UE, the source RDU schedules the mirror image of the MAC entity of the source RDU, and sends the failed data to the source RDU of the UE through the transceiver 702.
Optionally, the resources of the target RDU700 include time domain resources of the target RDU700 and/or frequency domain resources of the target RDU 700.
The memory 703 may store data used by the processor 701 in performing operations, and the memory 703 may be a memory of a physical host carrying the SDN controller, such as a hard disk, a U-disk, an SD card, and the like.
The present embodiment also provides a computer storage medium for storing computer software instructions for the target RDU of the above embodiments, which includes a program designed to execute the above embodiments.
Based on the same inventive concept, the embodiment of the present invention further provides a UE, and the UE may execute the method on the UE side in the RDU handover method provided in the embodiment. Referring to fig. 8, a UE800 includes: a transceiving unit 801 and a processing unit 802. Wherein:
a transceiver unit 801, configured to report a first channel quality and a second channel quality to a source RDU serving the UE800, where the first channel quality refers to a quality of a channel between the UE800 and the source RDU, the second channel quality refers to a quality of a channel between the UE800 and a target RDU, and the first channel quality and the second channel quality are used by the source RDU to determine that the UE800 is switched from the source RDU to the target RDU;
the transceiving unit 801 is further configured to receive a message sent by the source RDU, where the message is used to instruct the UE800 to switch from the source RDU to the target RDU;
the processing unit 802 is configured to switch the UE800 from the source RDU to the target RDU according to the message received by the transceiver unit 801, and in a process that the UE800 is switched from the source RDU to the target RDU, the source RDU is used to schedule the target RDU to perform data transmission with the UE 800.
It should be noted that, for specific functional descriptions of the above units, reference may be made to an RDU switching method as shown in fig. 3, which is not described herein again.
Based on the same inventive concept, an embodiment of the present invention further provides a UE900, where the UE900 may execute the method on the UE900 side in the RDU handover method provided in the embodiment, and may be the same device as the UE900 shown in fig. 8. Referring to fig. 9, the UE900 includes: a processor 901, a transceiver 902, and a memory 903. Wherein,
a processor 901 for reading the program in the memory 903, and executing the following processes:
a processor 901, configured to report, by using the transceiver 902, a first channel quality and a second channel quality to a source RDU serving the UE900, where the first channel quality refers to a quality of a channel between the UE900 and the source RDU, the second channel quality refers to a quality of a channel between the UE900 and a target RDU, and the first channel quality and the second channel quality are used by the source RDU to determine that the UE900 is switched from the source RDU to the target RDU;
a processor 901, configured to receive, through the transceiver 902, a message sent by a source RDU, where the message is used to instruct the UE900 to switch from the source RDU to a target RDU;
the processor 901 is further configured to switch the UE900 from the source RDU to the target RDU according to the message, and in a process that the UE900 switches from the source RDU to the target RDU, the source RDU is used to schedule the target RDU to perform data transmission with the UE 900.
The storage 903 may be a memory of a physical host carrying the SDN controller, such as a hard disk, a usb disk, an SD card, and the like.
The present embodiment also provides a computer storage medium for storing computer software instructions for the target RDU of the above embodiments, which includes a program designed to execute the above embodiments.
By the source RDU, the target RDU and the UE provided by the embodiment of the invention, the UE can be quickly switched from the source RDU to the target RDU. In the process of switching the UE from the source RDU to the target RDU, because the resource of the target RDU is used for being scheduled by the source RDU, and the resource of the target RDU scheduled by the source RDU is used for data transmission between the target RDU and the UE, in the process of switching the UE from the source RDU to the target RDU, the technical scheme provided by the embodiment of the invention can ensure that the target RDU and the UE can carry out data transmission, and the interruption time delay of the data transmission in the process of switching the UE from the source RDU to the target RDU is reduced to the lowest, thereby meeting the requirement of the interruption time delay of the data transmission for RDU switching in a 5G network.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.

Claims (20)

1. A method for switching a wireless data unit (RDU), comprising:
a source RDU receives a first channel quality and a second channel quality reported by User Equipment (UE) served by the source RDU, wherein the first channel quality refers to the quality of a channel between the UE and the source RDU, and the second channel quality refers to the quality of a channel between the UE and a target RDU;
when the source RDU determines that the first channel quality and the second channel quality meet preset conditions and determines that resources of the target RDU are used for being scheduled by the source RDU, the source RDU sends a first message to the UE and sends a second message to the target RDU, the first message is used for indicating that the UE is switched from the source RDU to the target RDU, the second message is used for indicating the resources of the target RDU scheduled by the source RDU, and the resources of the target RDU are used for carrying out data transmission between the target RDU and the UE in the process that the UE is switched from the source RDU to the target RDU.
2. The method of claim 1, wherein prior to the source RDU sending the second message to the target RDU, further comprising:
and the source RDU determines the resources of the target RDU scheduled by the source RDU according to the second channel quality.
3. The method of claim 1 or 2, further comprising:
in the process that the UE is switched from the source RDU to the target RDU, when the source RDU fails to send data to the UE, the source RDU schedules the target RDU to send the failed data to the UE through a mirror image of a Media Access Control (MAC) entity of the source RDU, which is established on the target RDU.
4. A method according to any one of claims 1 to 3, wherein the preset conditions include:
the difference between the second channel quality and the first channel quality is greater than a first threshold; and/or the presence of a gas in the gas,
the first channel quality is less than a second threshold, and the second channel quality is greater than a third threshold.
5. The method of any of claims 1 to 4, wherein the resources of the target RDU comprise time domain resources of the target RDU and/or frequency domain resources of the target RDU.
6. A method for switching wireless data unit (RDU), comprising:
a target RDU receives a message sent by a source RDU, wherein the message is used for indicating the resource of the target RDU scheduled by the source RDU, and the resource of the target RDU is used for data transmission between the target RDU and the UE in the process that the UE is switched from the source RDU to the target RDU;
and in the process that the UE is switched from the source RDU to the target RDU, the target RDU performs data transmission with the UE through the resource of the target RDU indicated by the message, wherein the resource of the target RDU is used for being scheduled by the source RDU.
7. The method of claim 6, wherein prior to the target RDU receiving the message sent by the source RDU, further comprising:
and reserving set resources by the target RDU, wherein the set resources are used for data transmission between the target RDU and the UE in the process that the UE is switched from the source RDU to the target RDU by the scheduling of the source RDU.
8. The method of claim 6 or 7, further comprising:
the target RDU establishes a mirror image of a Media Access Control (MAC) entity of the source RDU;
in the process that the UE is switched from the source RDU to the target RDU, when the source RDU fails to send data to the UE, the target RDU is scheduled by the source RDU through the mirror image of the MAC entity of the source RDU, and the source RDU sends the failed data to the UE.
9. The method of any of claims 6 to 8, wherein the resources of the target RDU comprise time domain resources of the target RDU and/or frequency domain resources of the target RDU.
10. A method for switching a wireless data unit (RDU), comprising:
user Equipment (UE) reports a first channel quality and a second channel quality to a source RDU (remote data unit) serving for the UE, wherein the first channel quality refers to the quality of a channel between the UE and the source RDU, the second channel quality refers to the quality of a channel between the UE and a target RDU, and the first channel quality and the second channel quality are used for the source RDU to determine that the UE is switched from the source RDU to the target RDU;
the UE receives a message sent by the source RDU, wherein the message is used for indicating the UE to be switched from the source RDU to the target RDU;
and the UE is switched from the source RDU to the target RDU according to the received message, and the source RDU is used for scheduling the target RDU and the UE to carry out data transmission in the process of switching the UE from the source RDU to the target RDU.
11. A source wireless data unit, RDU, comprising:
a transceiver unit, configured to receive a first channel quality and a second channel quality reported by a user equipment UE served by the source RDU, where the first channel quality refers to a quality of a channel between the UE and the source RDU, and the second channel quality refers to a quality of a channel between the UE and a target RDU;
a processing unit, configured to determine that the first channel quality and the second channel quality received by the transceiver unit satisfy a preset condition, and determine that resources of the target RDU are used for being scheduled by the source RDU, where the resources of the target RDU are used for performing data transmission between the target RDU and the UE in a process that the UE is switched from the source RDU to the target RDU;
the transceiver unit is further configured to send a first message to the UE and send a second message to the target RDU when the processing unit determines that the first channel quality and the second channel quality satisfy the preset condition and determines that the resource of the target RDU is used to be scheduled by the source RDU, where the first message is used to instruct the UE to switch from the source RDU to the target RDU, and the second message is used to instruct the resource of the target RDU scheduled by the source RDU.
12. The source RDU of claim 11, wherein the processing unit is further to:
and determining the resources of the target RDU scheduled by the source RDU according to the second channel quality before the transceiver unit sends the second message to the target RDU.
13. The source RDU of claim 11 or 12, wherein the processing unit is further to:
in the process that the UE is switched from the source RDU to the target RDU, when the source RDU fails to send data to the UE, the transceiver unit is controlled to schedule the target RDU to send the failed data to the UE through a mirror image of a Media Access Control (MAC) entity of the source RDU, which is established on the target RDU.
14. The source RDU according to any one of claims 11 to 13, wherein the preset conditions include:
the difference between the second channel quality and the first channel quality is greater than a first threshold; and/or the presence of a gas in the gas,
the first channel quality is less than a second threshold, and the second channel quality is greater than a third threshold.
15. The source RDU of any of claims 11 to 14, wherein the resources of the target RDU comprise time domain resources of the target RDU and/or frequency domain resources of the target RDU.
16. A target wireless data unit, RDU, comprising:
a transceiver unit, configured to receive a message sent by a source RDU, where the message is used to indicate a resource of a target RDU scheduled by the source RDU, and the resource of the target RDU is used for data transmission between the target RDU and the UE in a process where the UE switches from the source RDU to the target RDU;
a processing unit, configured to control, during a process that the UE switches from the source RDU to the target RDU, the transceiver unit to perform data transmission with the UE through the resource of the target RDU indicated by the message received by the transceiver unit, where the resource of the target RDU is used to be scheduled by the source RDU;
the transceiver unit is further configured to perform data transmission with the UE through resources of the target RDU in a process that the UE is switched from the source RDU to the target RDU.
17. The target RDU of claim 16, wherein the processing unit is further to:
and reserving set resources before the transceiver unit receives the message sent by the source RDU, wherein the set resources are used for data transmission between the target RDU and the UE in the process that the UE is switched from the source RDU to the target RDU by the scheduling of the source RDU.
18. The target RDU of claim 16 or 17, wherein the processing unit is further to:
establishing a mirror image of a Media Access Control (MAC) entity of the source RDU on the target RDU;
in the process that the UE is switched from the source RDU to the target RDU, when the source RDU fails to send data to the UE, the source RDU schedules the source RDU through the mirror image of the MAC entity of the source RDU, and the transceiver unit is controlled to send the data which are failed to be sent by the source RDU to the UE.
19. The target RDU of any of claims 16 to 18, wherein the resources of the target RDU comprise time domain resources of the target RDU and/or frequency domain resources of the target RDU.
20. A User Equipment (UE), comprising:
a transceiver unit, configured to report a first channel quality and a second channel quality to a source RDU serving the UE, where the first channel quality refers to a quality of a channel between the UE and the source RDU, the second channel quality refers to a quality of a channel between the UE and the target RDU, and the first channel quality and the second channel quality are used for the source RDU to determine that the UE is switched from the source RDU to the target RDU;
the transceiver unit is further configured to receive a message sent by the source RDU, where the message is used to instruct the UE to switch from the source RDU to the target RDU;
and the processing unit is used for switching the UE from the source RDU to the target RDU according to the message received by the transceiver unit, and in the process of switching the UE from the source RDU to the target RDU, the source RDU is used for scheduling the target RDU and the UE to carry out data transmission.
CN201611264143.9A 2016-12-30 2016-12-30 A kind of switching method and equipment of wireless data unit RDU Withdrawn CN108271231A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201611264143.9A CN108271231A (en) 2016-12-30 2016-12-30 A kind of switching method and equipment of wireless data unit RDU
PCT/CN2017/114494 WO2018121189A1 (en) 2016-12-30 2017-12-04 Method and device for switching radio data unit (rdu)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611264143.9A CN108271231A (en) 2016-12-30 2016-12-30 A kind of switching method and equipment of wireless data unit RDU

Publications (1)

Publication Number Publication Date
CN108271231A true CN108271231A (en) 2018-07-10

Family

ID=62707847

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201611264143.9A Withdrawn CN108271231A (en) 2016-12-30 2016-12-30 A kind of switching method and equipment of wireless data unit RDU

Country Status (2)

Country Link
CN (1) CN108271231A (en)
WO (1) WO2018121189A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013125996A1 (en) * 2012-02-22 2013-08-29 Telefonaktiebolaget Lm Ericsson (Publ) Method and base station for controlling wireless communication of data
CN104113875A (en) * 2013-04-19 2014-10-22 华为技术有限公司 Cell switching method, device and apparatus

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101052213A (en) * 2006-04-04 2007-10-10 华为技术有限公司 User's data transmission method while user's device switching in long term evolution network
CN101370267B (en) * 2007-08-19 2012-06-06 中兴通讯股份有限公司 Switching method for mobile communication system
CN101841872B (en) * 2009-03-17 2013-01-30 电信科学技术研究院 Method and relay equipment for implementing cell switch
CN103369587B (en) * 2012-04-01 2018-01-12 华为技术有限公司 A kind of measuring method and device
CN102932859B (en) * 2012-09-28 2015-06-10 三维通信股份有限公司 System and method for switching long term evolution (LTE)-advanced mobile relay (MR) and eNode B
WO2014074894A1 (en) * 2012-11-09 2014-05-15 Interdigital Patent Holdings, Inc. Beamforming methods and methods for using beams

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013125996A1 (en) * 2012-02-22 2013-08-29 Telefonaktiebolaget Lm Ericsson (Publ) Method and base station for controlling wireless communication of data
CN104113875A (en) * 2013-04-19 2014-10-22 华为技术有限公司 Cell switching method, device and apparatus

Also Published As

Publication number Publication date
WO2018121189A1 (en) 2018-07-05

Similar Documents

Publication Publication Date Title
US11664933B2 (en) Method and apparatus for flushing HARQ buffer in wireless communication system
US11219035B2 (en) Method and apparatus for deprioritizing duplicated packet transmission in wireless communication system
JP7091359B2 (en) Radio Access in a Mobile Communication Network Reliable data packet transmission between network entities
CN117395768A (en) Communication system, communication terminal and base station
CN107750064B (en) Data transmission method, base station and user equipment
KR100487245B1 (en) Apparatus for minimizing transmission impossibility time due to compressed mode in mobile communication system using high speed downlink packet access scheme and method thereof
US8644834B2 (en) Resource allocation
CA2622120C (en) Mobile communications cell changing procedure
EP2190241B1 (en) Apparatus and method for handover between base stations in carrier aggregation environment
CN118354452A (en) Communication system and communication terminal device
US11665746B2 (en) Handling collisions in wireless networks
US20110058529A1 (en) Mobile communication system, mobile station apparatus, base station apparatus, communication method, and communication control method
CN113271633A (en) Switching method and communication device
US20100080194A1 (en) Radio base station and mobile station
KR20180111770A (en) A resource configuration method for handover, a network access point and a mobile station
WO2013074457A1 (en) Handover management using a broadcast channel in a network having synchronized base stations
JP2013153519A (en) Configuration of changing and improving hs-dsch serving cell
JP6657114B2 (en) Terminal handover method and apparatus in mobile communication system
CN114175726B (en) Wireless communication method for mobility control
KR20090016419A (en) Method for controlling a harq operation in a dynamic radio resource allocation
WO2021062713A1 (en) Resource selection for transmission of pending data unit
CN116134932A (en) Communication control method and user equipment
RU2733275C1 (en) Method and apparatus for double connectivity between user equipment with double protocol stack and two radio access telecommunications network basic frequency band units
CN101594650A (en) The methods, devices and systems of configuring transmission time interval bonding
CN113396631A (en) Communication device, infrastructure equipment and method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication

Application publication date: 20180710

WW01 Invention patent application withdrawn after publication