CN112235877B - Method, device and computer readable storage medium for remapping backhaul link - Google Patents
Method, device and computer readable storage medium for remapping backhaul link Download PDFInfo
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- CN112235877B CN112235877B CN201910637406.3A CN201910637406A CN112235877B CN 112235877 B CN112235877 B CN 112235877B CN 201910637406 A CN201910637406 A CN 201910637406A CN 112235877 B CN112235877 B CN 112235877B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/27—Transitions between radio resource control [RRC] states
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/08—Load balancing or load distribution
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/11—Allocation or use of connection identifiers
Abstract
The embodiment of the invention provides a return link remapping method, a device and a computer readable storage medium, wherein the method comprises the following steps: the relay node or the terminal receives the path information; carrying out mapping establishment or updating carried to a return link based on the path information; and feeding back the result of the mapping establishment or updating to the next hop relay node or the donor base station.
Description
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to a backhaul link remapping method, apparatus, and computer readable storage medium.
Background
With the advent of endless data type applications such as virtual reality and augmented reality, the current mobile communication network capacity is increasingly unable to meet the demands of people, and network densification becomes an important means for improving the network capacity. In order to further improve the utilization rate of spectrum resources, improve the reliability of the network, provide more accurate QoS management, load balancing and service-based multipath routing, unified access backhaul (Integrated Access andBackhaul, IAB) technology is essential, and has great research value.
In the IAB related technology, the donor base station may send an instruction for establishing, modifying, and releasing the BH RLC channel to the IAB node or the terminal, and the adaptation layer of the IAB node or the terminal receives the instruction from the donor base station to perform a corresponding operation, and maps the UE DRB onto the BH RLC channel. However, according to the relevant mechanism, the IAB node serving as the relay does not know the current network relay topology and load situation, i.e. when selecting the IAB node of the next hop or deciding on the DRB to BH RLC channel mapping, there is no path information of the next hop node to the donor base station or terminal. On one hand, when the relay topology changes due to reasons such as node movement, it is difficult to ensure the communication quality of the end-to-end path; on the other hand, the path cannot be reasonably selected according to the link load, so that the link load is unbalanced. There is no DRB to BH rlc channel mapping in LTE due to the difference in QoS mechanisms, but similarly, the Relay node has no path information from the next-hop node to the last-hop base station or terminal.
Disclosure of Invention
In view of this, embodiments of the present invention desire to provide a backhaul link remapping method, apparatus, and computer readable storage medium.
In order to achieve the above object, the technical solution of the embodiment of the present invention is as follows:
The embodiment of the invention provides a return link remapping method, which is applied to a relay node or a terminal and comprises the following steps:
receiving path information;
carrying out mapping establishment or updating carried to a return link based on the path information;
and feeding back the result of the mapping establishment or updating to the next hop relay node or the donor base station.
Wherein the receiving path information includes:
the relay node receives the path information at least through an F1-AP interface; or alternatively, the process may be performed,
and the terminal receives the path information at least through an air interface by Radio Resource Control (RRC) signaling.
Optionally, the method further comprises:
and after receiving the result of the mapping establishment or updating of the previous hop relay node or the terminal, the relay node establishes or updates the mapping of the node.
Wherein the path information includes at least one of the following information:
an adaptation layer address or identity of a relay node or terminal as a communication destination;
an adaptation layer identification of a path to a communication destination;
the identification of the next hop relay node of the notified relay node or terminal;
a terminal identifier to which the path information is applicable;
and the bearing identifier of the terminal to which the path information is applicable.
Wherein the path information further includes one or more of the following:
priority of paths reaching the same destination;
the last hop relay node or terminal identification of the notified relay node;
and the QoS requirement information of the bearer to which the path information is applicable.
Wherein the establishing or updating the mapping from the bearer to the backhaul link based on the path information includes:
the adaptation layer of the relay node or the terminal determines a path and a next hop node according to the path information, and establishes or updates the mapping carried to the first backhaul link; wherein, the liquid crystal display device comprises a liquid crystal display device,
the first backhaul link meets the QoS requirements of the corresponding bearer; the respective bearers include at least one of:
all bearers of the current node;
all bearers of the one or more terminals indicated by the received path information;
one or more bearers of one or more terminals indicated by the received path information.
Wherein the performing mapping establishment or updating of the bearer to the first backhaul link includes:
if the first return link does not exist between the next hop node and the next hop node, a first return link establishment flow is initiated; or alternatively, the process may be performed,
and if the first backhaul link exists between the node and the next hop node, but the mapping of the corresponding bearer to the first backhaul link does not exist, the mapping of the corresponding bearer to the first backhaul link is established or updated.
And if the first backhaul link exists between the determination and the next hop node, but there is no mapping of the corresponding bearer to the first backhaul link, establishing or updating the mapping of the corresponding bearer to the first backhaul link, including one or more of the following:
the adaptation layer adds an adaptation layer address or an identification in a packet header of a data packet adaptation layer correspondingly loaded, and also adds an adaptation layer identification of a path;
the adaptation layer adds the special identification of the adaptation layer, which is obtained by the conversion of the address or identification of the adaptation layer and the identification of the adaptation layer of the path, in the packet header of the corresponding carried data packet adaptation layer;
when the fact that the mapping from the corresponding bearer to the second backhaul link exists is determined, the adaptation layer sends a data transmission completion indication through the second backhaul link after the mapping from the corresponding bearer to the first backhaul link is established or updated;
when it is determined that data packets of other bearers than the corresponding bearer already exist on the first backhaul link, the adaptation layer adds a terminal identifier or a bearer identifier of the terminal corresponding to each bearer in packet headers of the corresponding bearer and the data packet adaptation layer of the other bearers.
The step of feeding back the result of mapping establishment or updating to the next hop relay node or the donor base station comprises the following steps:
The result of the mapping establishment or update is contained in an adaptation layer packet header of at least a first data packet sent over a first backhaul link; or alternatively, the process may be performed,
the result of the map creation or update is sent in the form of a control data packet.
Wherein, when the result of the mapping establishment or updating is fed back to the next hop relay node, the result is at least sent through an air interface Uu;
and when the result of the mapping establishment or updating is fed back to the donor base station, the result is at least sent through an F1-AP interface.
The embodiment of the invention also provides a return link remapping method, which is applied to the donor base station and comprises the following steps:
transmitting path information;
and receiving a result of establishing or updating the mapping carried by the relay node or the terminal to the return link based on the path information.
Wherein the transmission path information includes:
and sending the path information to at least one relay node or terminal.
Wherein when the receiver of the path information is a relay node, the sending the path information includes:
transmitting the path information at least through an F1-AP interface;
when the receiver of the path information is a terminal, the sending path information includes:
the path information is sent via radio resource control, RRC, signaling over at least the air interface.
The receiving the result of the mapping establishment or updating carried to the backhaul link by the relay node or the terminal based on the path information includes:
and receiving a result of establishing or updating the mapping from the relay node or the terminal to the backhaul link based on the path information at least through the F1-AP interface.
The embodiment of the invention also provides a device for remapping the return link, which is applied to the relay node or the terminal and comprises the following steps:
the first receiving module is used for receiving the path information;
the mapping module is used for carrying out mapping establishment or updating of the bearing to the return link based on the path information;
and the first sending module is used for feeding back the mapping establishment or updating result to the next hop relay node or the donor base station.
The embodiment of the invention also provides a device for remapping the return link, which is applied to the donor base station and comprises the following components:
the second sending module is used for sending the path information;
and the second receiving module is used for receiving the result of the establishment or update of the mapping carried to the return link by the relay node or the terminal based on the path information.
The embodiment of the invention also provides a device for remapping the return link, which comprises: a processor and a memory for storing a computer program capable of running on the processor,
Wherein the processor is configured to execute the steps of the above method when running the computer program.
The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, which when being executed by a processor, implements the steps of the above method.
The embodiment of the invention provides a return link remapping method, a device and a computer readable storage medium, wherein the method comprises the following steps: the relay node or the terminal receives the path information; carrying out mapping establishment or updating carried to a return link based on the path information; and feeding back the result of the mapping establishment or updating to the next hop relay node or the donor base station. The embodiment of the invention does not need connection reconstruction among the relay node, the terminal and the donor base station, thereby optimizing the path of the multi-hop relay network, guaranteeing the end-to-end communication quality and realizing the link load balancing of the relay network.
Drawings
Fig. 1 is a flowchart of a backhaul link remapping method according to an embodiment of the present invention;
fig. 2 is a flowchart of a second embodiment of a backhaul link remapping method according to the present invention;
fig. 3 is a schematic diagram of a backhaul link remapping device according to an embodiment of the present invention;
Fig. 4 is a schematic diagram of a backhaul link remapping device according to an embodiment of the present invention;
fig. 5 is a flowchart of a backhaul link remapping method according to an embodiment of the present invention.
Detailed Description
The invention is described below with reference to the drawings and examples.
In the related art, in a 4G (LTE) Relay network, relays are classified according to a Relay policy as follows:
(1) The Type1Relay can independently control terminals in a certain small-range area, and has independent cell identification and wireless resource management mechanism. From the terminal side, type1Relay is a conventional eNodeB.
(2) Type 1aRelay has most of the characteristics of Type1Relay, but the spectrum used by the access link between its Relay and the terminal and the backhaul link between the eNodeB and the Relay is different.
(3) Type1bRelay also has most of the characteristics of Type1Relay, but the access link between its Relay and terminal and the backhaul link between eNodeB and Relay use the same spectrum. The Relay can work on two links at the same time without mutual interference through the physical isolation of the access link and the backhaul link.
(4) Type2Relay has functions of an independent physical layer, a MAC layer, an RLC layer, etc., and has independent or partial RRC functions. Since the Type2Relay has no own independent cell and no independent PCI, part of its control function is controlled by the eNodeB, i.e. the Type2Relay only transmits PDSCH but does not transmit CRS and PDCCH.
It can be seen that since 4G (LTE) networks do not support the architecture of CU/DU separation, the Relay node is either identical to the presence of a base station (independent cell) or has independent protocol functionality but is still under the control of the base station.
The NR IAB supports CU/DU split architecture, so that the IAB node as a relay only needs to have a user plane function, forward the user data of its child node to its parent node (uplink), or forward the user data of its parent node to its child node (downlink), guarantee QoS as much as possible, and implement logical isolation for different UEs and even different data bearers of different UEs when necessary. Therefore, a new adaptation layer (temporary name is an adaptation layer) is introduced above the RLC layer of the IAB node, and is responsible for mapping uplink data bearers (DRBs) of UEs and/or sub-nodes accessing the IAB node to a relay RLC channel (BH RLC channel) connected to the parent node, or mapping downlink DRBs of the parent node to a BH RLC channel connected to UEs and/or sub-nodes accessing the IAB node, where data on the same BH RLC channel obtains the same QoS treatment. In the mapping, one-to-one or many-to-one mapping of DRBs to BH RLC channels is supported. However, according to the relevant mechanism, the IAB node serving as the relay does not know the current network relay topology and load situation, i.e. when selecting the IAB node of the next hop or deciding on the DRB to BH RLC channel mapping, there is no path information of the next hop node to the donor base station or terminal.
Therefore, an embodiment of the present invention provides a backhaul link remapping method, which is applied to a relay node or a terminal, as shown in fig. 1, including:
step 101: receiving path information;
step 102: carrying out mapping establishment or updating carried to a return link based on the path information;
step 103: and feeding back the result of the mapping establishment or updating to the next hop relay node or the donor base station.
Therefore, the embodiment of the invention does not need connection reconstruction among the relay node, the terminal and the donor base station, thereby optimizing the path of the multi-hop relay network, guaranteeing the end-to-end communication quality and realizing the link load balancing of the relay network.
In an embodiment of the present invention, the receiving path information includes:
the relay node receives the path information at least through an F1-AP interface; or alternatively, the process may be performed,
and the terminal receives the path information at least through an air interface by Radio Resource Control (RRC) signaling.
In one embodiment, the method further comprises:
and after receiving the result of the mapping establishment or updating of the previous hop relay node or the terminal, the relay node establishes or updates the mapping of the node.
In the embodiment of the present invention, the path information at least includes one of the following information:
An adaptation layer address or identity of a relay node or terminal as a communication destination;
an adaptation layer identification of a path to a communication destination;
the identification of the next hop relay node of the notified relay node or terminal;
a terminal identifier to which the path information is applicable;
and the bearing identifier of the terminal to which the path information is applicable.
In one embodiment, the path information may further include one or more of the following:
priority of paths reaching the same destination;
the last hop relay node or terminal identification of the notified relay node;
and the QoS requirement information of the bearer to which the path information is applicable.
In one embodiment, the establishing or updating the mapping carried to the backhaul link based on the path information includes:
the adaptation layer of the relay node or the terminal determines a path and a next hop node according to the path information, and establishes or updates the mapping carried to the first backhaul link; wherein, the liquid crystal display device comprises a liquid crystal display device,
the first backhaul link meets the QoS requirements of the corresponding bearer; the respective bearers include at least one of:
all bearers of the current node;
all bearers of the one or more terminals indicated by the received path information;
One or more bearers of one or more terminals indicated by the received path information.
In one embodiment, the performing mapping establishment or updating of the bearer to the first backhaul link includes:
if the first return link does not exist between the next hop node and the next hop node, a first return link establishment flow is initiated; or alternatively, the process may be performed,
and if the first backhaul link exists between the node and the next hop node, but the mapping of the corresponding bearer to the first backhaul link does not exist, the mapping of the corresponding bearer to the first backhaul link is established or updated.
In one embodiment, if the first backhaul link exists between the first backhaul link and the next hop node, but there is no mapping of the corresponding bearer to the first backhaul link, the mapping of the corresponding bearer to the first backhaul link is established or updated, including one or more of the following:
the adaptation layer adds an adaptation layer address or an identification in a packet header of a data packet adaptation layer correspondingly loaded, and also adds an adaptation layer identification of a path;
the adaptation layer adds the special identification of the adaptation layer, which is obtained by the conversion of the address or identification of the adaptation layer and the identification of the adaptation layer of the path, in the packet header of the corresponding carried data packet adaptation layer;
when the fact that the mapping from the corresponding bearer to the second backhaul link exists is determined, the adaptation layer sends a data transmission completion indication through the second backhaul link after the mapping from the corresponding bearer to the first backhaul link is established or updated;
When it is determined that data packets of other bearers than the corresponding bearer already exist on the first backhaul link, the adaptation layer adds a terminal identifier or a bearer identifier of the terminal corresponding to each bearer (i.e., all the bearers on the first backhaul link, including the corresponding bearer and the other bearers) in a packet header of the corresponding bearer and the data packet adaptation layer of the other bearers.
In one embodiment, the feeding back the result of the mapping establishment or update to the next hop relay node or the donor base station includes:
the result of the mapping establishment or update is contained in an adaptation layer packet header of at least a first data packet sent over a first backhaul link; or alternatively, the process may be performed,
the result of the map creation or update is sent in the form of a control data packet.
In the embodiment of the invention, when the result of mapping establishment or updating is fed back to the next hop relay node, the result is at least sent through an air interface Uu;
and when the result of the mapping establishment or updating is fed back to the donor base station, the result is at least sent through an F1-AP interface.
The embodiment of the invention also provides a return link remapping method, which is applied to the donor base station, as shown in fig. 2, and comprises the following steps:
step 201: transmitting path information;
Step 202: and receiving a result of establishing or updating the mapping carried by the relay node or the terminal to the return link based on the path information.
In one embodiment, the transmission path information includes:
and sending the path information to at least one relay node or terminal.
In one embodiment, when the receiver of the path information is a relay node, the sending the path information includes:
transmitting the path information at least through an F1-AP interface;
when the receiver of the path information is a terminal, the sending path information includes:
the path information is sent via radio resource control, RRC, signaling over at least the air interface.
In one embodiment, the receiving the result of the mapping establishment or updating of the bearer to the backhaul link by the relay node or the terminal based on the path information includes:
and receiving a result of establishing or updating the mapping from the relay node or the terminal to the backhaul link based on the path information at least through the F1-AP interface.
In order to implement the above method embodiment, the embodiment of the present invention further provides a backhaul link remapping device, where the device is applied to a relay node or a terminal, as shown in fig. 3, and includes:
a first receiving module 301, configured to receive path information;
A mapping module 302, configured to establish or update a mapping carried to a backhaul link based on the path information;
a first sending module 303, configured to feed back a result of the mapping establishment or update to a next hop relay node or a donor base station.
In one embodiment, the first receiving module 301 receives path information, including:
receiving the path information at least through an F1-AP interface; or alternatively, the process may be performed,
and receiving the path information at least through an air interface by Radio Resource Control (RRC) signaling.
In one embodiment, the mapping module 302 is further configured to perform mapping establishment or update of the node after receiving a result of mapping establishment or update of a previous hop relay node or a terminal.
In the embodiment of the present invention, the path information at least includes one of the following information:
an adaptation layer address or identity of a relay node or terminal as a communication destination;
an adaptation layer identification of a path to a communication destination;
the identification of the next hop relay node of the notified relay node or terminal;
a terminal identifier to which the path information is applicable;
and the bearing identifier of the terminal to which the path information is applicable.
In one embodiment, the path information further includes one or more of the following:
Priority of paths reaching the same destination;
the last hop relay node or terminal identification of the notified relay node;
and the QoS requirement information of the bearer to which the path information is applicable.
In one embodiment, the mapping module 302 performs mapping establishment or updating of the bearer to the backhaul link based on the path information, including:
determining a path and a next hop node according to the path information, and establishing or updating a mapping carried to a first backhaul link; wherein, the liquid crystal display device comprises a liquid crystal display device,
the first backhaul link meets the QoS requirements of the corresponding bearer; the respective bearers include at least one of:
all bearers of the current node;
all bearers of the one or more terminals indicated by the received path information;
one or more bearers of one or more terminals indicated by the received path information.
In one embodiment, the mapping module 302 performs mapping establishment or update of the bearer to the first backhaul link, including:
if the first return link does not exist between the next hop node and the next hop node, a first return link establishment flow is initiated; or alternatively, the process may be performed,
and if the first backhaul link exists between the node and the next hop node, but the mapping of the corresponding bearer to the first backhaul link does not exist, the mapping of the corresponding bearer to the first backhaul link is established or updated.
In one embodiment, the mapping module 302 determines that a first backhaul link exists between the mapping module 302 and the next hop node, but there is no mapping of the corresponding bearer to the first backhaul link, and establishes or updates the mapping of the corresponding bearer to the first backhaul link, including one or more of the following:
the adaptation layer adds an adaptation layer address or an identification in a packet header of a data packet adaptation layer correspondingly loaded, and also adds an adaptation layer identification of a path;
the adaptation layer adds the special identification of the adaptation layer, which is obtained by the conversion of the address or identification of the adaptation layer and the identification of the adaptation layer of the path, in the packet header of the corresponding carried data packet adaptation layer;
when the fact that the mapping from the corresponding bearer to the second backhaul link exists is determined, the adaptation layer sends a data transmission completion indication through the second backhaul link after the mapping from the corresponding bearer to the first backhaul link is established or updated;
when it is determined that data packets of other bearers than the corresponding bearer already exist on the first backhaul link, the adaptation layer adds a terminal identifier or a bearer identifier of the terminal corresponding to each bearer in packet headers of the corresponding bearer and the data packet adaptation layer of the other bearers.
In one embodiment, the first sending module 303 feeds back the result of the mapping establishment or update to the next hop relay node or the donor base station, including:
The result of the mapping establishment or update is contained in an adaptation layer packet header of at least a first data packet sent over a first backhaul link; or alternatively, the process may be performed,
the result of the map creation or update is sent in the form of a control data packet.
In one embodiment of the present invention, in one embodiment,
when the result of mapping establishment or updating is fed back to the next hop relay node, the first sending module 303 sends the result at least through the air interface Uu;
when the result of the mapping establishment or updating is fed back to the donor base station, the first sending module 303 sends the result at least through the F1-AP interface.
The embodiment of the invention also provides a device for remapping the backhaul link, which is applied to the donor base station, as shown in fig. 4, and comprises:
a second transmitting module 401, configured to transmit path information;
a second receiving module 402, configured to receive a result of the mapping establishment or update of the bearer to the backhaul link by the relay node or the terminal based on the path information.
In one embodiment, the second sending module 401 sends path information including:
and sending the path information to at least one relay node or terminal.
In one embodiment of the present invention, in one embodiment,
when the receiver of the path information is a relay node, the second sending module 401 sends the path information including:
Transmitting the path information at least through an F1-AP interface;
when the receiver of the path information is a terminal, the second sending module 401 sends the path information including:
the path information is sent via radio resource control, RRC, signaling over at least the air interface.
In one embodiment, the second receiving module 402 receives a result of mapping establishment or updating of a bearer to a backhaul link by a relay node or a terminal based on the path information, including:
and receiving a result of establishing or updating the mapping from the relay node or the terminal to the backhaul link based on the path information at least through the F1-AP interface.
The embodiment of the invention also provides a device for remapping the return link, which comprises: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor, when executing the computer program, performs:
receiving path information;
carrying out mapping establishment or updating carried to a return link based on the path information;
and feeding back the result of the mapping establishment or updating to the next hop relay node or the donor base station.
The processor, when receiving path information, is further configured to execute, when executing the computer program:
Receiving the path information at least through an F1-AP interface; or alternatively, the process may be performed,
and receiving the path information at least through an air interface by Radio Resource Control (RRC) signaling.
The processor is further configured to execute, when the computer program is executed:
and after receiving the result of the mapping establishment or updating of the previous hop relay node or the terminal, the relay node establishes or updates the mapping of the node.
The processor is further configured to perform, when executing the computer program, when performing the mapping establishment or updating of the bearer to the backhaul link based on the path information:
the adaptation layer determines a path and a next hop node according to the path information, and establishes or updates a mapping carried to the first backhaul link; wherein, the liquid crystal display device comprises a liquid crystal display device,
the first backhaul link meets the QoS requirements of the corresponding bearer; the respective bearers include at least one of:
all bearers of the current node;
all bearers of the one or more terminals indicated by the received path information;
one or more bearers of one or more terminals indicated by the received path information.
The processor is further configured to, when executing the computer program, perform:
If the first return link does not exist between the next hop node and the next hop node, a first return link establishment flow is initiated; or alternatively, the process may be performed,
and if the first backhaul link exists between the node and the next hop node, but the mapping of the corresponding bearer to the first backhaul link does not exist, the mapping of the corresponding bearer to the first backhaul link is established or updated.
And when the first backhaul link exists between the processor and the next hop node, but no mapping of the corresponding bearer to the first backhaul link exists, and the mapping of the corresponding bearer to the first backhaul link is established or updated, the processor is further configured to execute one or more of the following when running the computer program:
the adaptation layer adds an adaptation layer address or an identification in a packet header of a data packet adaptation layer correspondingly loaded, and also adds an adaptation layer identification of a path;
the adaptation layer adds the special identification of the adaptation layer, which is obtained by the conversion of the address or identification of the adaptation layer and the identification of the adaptation layer of the path, in the packet header of the corresponding carried data packet adaptation layer;
when the fact that the mapping from the corresponding bearer to the second backhaul link exists is determined, the adaptation layer sends a data transmission completion indication through the second backhaul link after the mapping from the corresponding bearer to the first backhaul link is established or updated;
When it is determined that data packets of other bearers than the corresponding bearer already exist on the first backhaul link, the adaptation layer adds a terminal identifier or a bearer identifier of the terminal corresponding to each bearer in packet headers of the corresponding bearer and the data packet adaptation layer of the other bearers.
The processor is further configured to, when feeding back the result of the mapping establishment or update to a next hop relay node or a donor base station, perform:
the result of the mapping establishment or update is contained in an adaptation layer packet header of at least a first data packet sent over a first backhaul link; or alternatively, the process may be performed,
the result of the map creation or update is sent in the form of a control data packet.
The processor is further configured to execute, when the computer program is executed:
at least sending a mapping establishment or updating result through an air interface Uu to be fed back to the next hop relay node; or alternatively, the process may be performed,
and sending a result of mapping establishment or updating to the donor base station at least through the F1-AP interface.
The embodiment of the invention also provides a device for remapping the return link, which comprises: a processor and a memory for storing a computer program capable of running on the processor,
Wherein the processor, when executing the computer program, performs:
transmitting path information;
and receiving a result of establishing or updating the mapping carried by the relay node or the terminal to the return link based on the path information.
The processor is further configured to, when executing the computer program, perform:
and sending the path information to at least one relay node or terminal.
When the receiving relay node or the terminal performs the result of the mapping establishment or updating carried to the backhaul link based on the path information, the processor is further configured to execute, when running the computer program:
and receiving a result of establishing or updating the mapping from the relay node or the terminal to the backhaul link based on the path information at least through the F1-AP interface.
It should be noted that: in the apparatus provided in the foregoing embodiments, only the division of each program module is used for illustration when performing backhaul link remapping, in practical application, the processing allocation may be performed by different program modules according to needs, that is, the internal structure of the device is divided into different program modules, so as to complete all or part of the processing described above. In addition, the apparatus provided in the foregoing embodiments and the corresponding method embodiments belong to the same concept, and specific implementation processes of the apparatus and the corresponding method embodiments are detailed in the method embodiments, which are not described herein again.
In an exemplary embodiment, the present invention further provides a computer readable storage medium, which may be FRAM, ROM, PROM, EPROM, EEPROM, flash Memory, magnetic surface Memory, optical disk, or CD-ROM; but may be a variety of devices including one or any combination of the above-described memories, such as a mobile phone, computer, tablet device, personal digital assistant, or the like.
The embodiment of the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs:
receiving path information;
carrying out mapping establishment or updating carried to a return link based on the path information;
and feeding back the result of the mapping establishment or updating to the next hop relay node or the donor base station.
When the computer program is executed by the processor, the method further performs:
receiving the path information at least through an F1-AP interface; or alternatively, the process may be performed,
and receiving the path information at least through an air interface by Radio Resource Control (RRC) signaling.
The computer program, when executed by the processor, further performs:
and after receiving the result of the mapping establishment or updating of the previous hop relay node or the terminal, the relay node establishes or updates the mapping of the node.
When the mapping carried to the backhaul link is established or updated based on the path information, the computer program is executed by the processor to further perform:
the adaptation layer determines a path and a next hop node according to the path information, and establishes or updates a mapping carried to the first backhaul link; wherein, the liquid crystal display device comprises a liquid crystal display device,
the first backhaul link meets the QoS requirements of the corresponding bearer; the respective bearers include at least one of:
all bearers of the current node;
all bearers of the one or more terminals indicated by the received path information;
one or more bearers of one or more terminals indicated by the received path information.
When the mapping from the bearer to the first backhaul link is established or updated, the computer program is executed by the processor, and further performs:
if the first return link does not exist between the next hop node and the next hop node, a first return link establishment flow is initiated; or alternatively, the process may be performed,
and if the first backhaul link exists between the node and the next hop node, but the mapping of the corresponding bearer to the first backhaul link does not exist, the mapping of the corresponding bearer to the first backhaul link is established or updated.
When the first backhaul link exists between the determination and the next hop node, but no mapping of the corresponding bearer to the first backhaul link exists, and when the mapping of the corresponding bearer to the first backhaul link is established or updated, the computer program further performs one or more of the following when executed by the processor:
The adaptation layer adds an adaptation layer address or an identification in a packet header of a data packet adaptation layer correspondingly loaded, and also adds an adaptation layer identification of a path;
the adaptation layer adds the special identification of the adaptation layer, which is obtained by the conversion of the address or identification of the adaptation layer and the identification of the adaptation layer of the path, in the packet header of the corresponding carried data packet adaptation layer;
when the fact that the mapping from the corresponding bearer to the second backhaul link exists is determined, the adaptation layer sends a data transmission completion indication through the second backhaul link after the mapping from the corresponding bearer to the first backhaul link is established or updated;
when it is determined that data packets of other bearers than the corresponding bearer already exist on the first backhaul link, the adaptation layer adds a terminal identifier or a bearer identifier of the terminal corresponding to each bearer in packet headers of the corresponding bearer and the data packet adaptation layer of the other bearers.
When the result of mapping establishment or updating is fed back to the next hop relay node or the donor base station, the computer program is executed by the processor and further executes:
the result of the mapping establishment or update is contained in an adaptation layer packet header of at least a first data packet sent over a first backhaul link; or alternatively, the process may be performed,
The result of the map creation or update is sent in the form of a control data packet.
The computer program, when executed by the processor, further performs:
at least sending a mapping establishment or updating result through an air interface Uu to be fed back to the next hop relay node; or alternatively, the process may be performed,
and sending a result of mapping establishment or updating to the donor base station at least through the F1-AP interface.
The embodiment of the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs:
transmitting path information;
and receiving a result of establishing or updating the mapping carried by the relay node or the terminal to the return link based on the path information.
When the computer program is executed by the processor, the method further performs:
and sending the path information to at least one relay node or terminal.
When the receiving relay node or the terminal carries out the result of mapping establishment or updating carried to the backhaul link based on the path information, the computer program is executed by the processor and further executes:
and receiving a result of establishing or updating the mapping from the relay node or the terminal to the backhaul link based on the path information at least through the F1-AP interface.
The invention is described below in connection with scene embodiments.
Example 1
An embodiment of the present invention provides a method for remapping a backhaul link of a relay node, as shown in fig. 5, including:
step 501: the donor base station sends path information to at least one relay node or terminal;
here, the donor base station may obtain an optimal path or select an optimal path from a plurality of preset paths by adopting any optimization algorithm according to QoS requirements carried by the terminal or the terminal, link reachability and load between relay nodes under the jurisdiction, and generate path information.
Wherein the path information includes at least one of:
an adaptation layer address or identity of a relay node or terminal as a communication destination;
an adaptation layer identification of a path to a communication destination;
the identification of the next hop relay node of the notified relay node or terminal;
a terminal identification (UE ID) to which the path information is applicable;
the bearer identification (UE bearer ID or UE DRB ID) of the terminal to which the path information is applied.
Optionally, the path information may further include the following: priority of paths reaching the same destination; and the last hop relay node or the terminal identifier of the relay node is notified, and the path information is applicable to the QoS requirement information of the bearer.
If the receiver is a relay node, at least supporting to send path information through an F1-wireless Access Point (AP) interface; if the receiver is a terminal, at least the transmission of path information by RRC signaling through an air interface is supported.
Step 502: the relay node or the terminal receives the path information sent by the donor base station, and the adaptive layer carries out mapping establishment or updating from the bearing to the first return link according to the path information;
the relay node at least supports receiving path information through an F1-AP interface; the terminal supports at least reception of path information by RRC signaling over the air interface.
Here, the adaptation layer of the relay node or the terminal determines a path and a next hop node according to the received path information, and performs mapping establishment or update of the bearer to the first backhaul link:
1) And if the first return link does not exist between the first return link and the next hop node, initiating a first return link establishment flow.
Wherein the first backhaul link should meet QoS requirements of the corresponding bearer.
The respective bearers are at least one of: a) All bearers of the current node; b) All bearers of one or more terminals indicated by the received path information; c) One or more bearers of one or more terminals indicated by the received path information.
2) If a first backhaul link exists between the node and the next hop node, but no mapping of the corresponding bearer to the first backhaul link exists, a mapping of the corresponding bearer to the first backhaul link is established or updated.
Wherein, if there is a mapping of the corresponding bearer to the other second backhaul link, the adaptation layer may send a data transmission completion indication through the second backhaul link after establishing or updating the mapping of the corresponding bearer to the first backhaul link, where the indication may be included in an adaptation layer packet header of a last data packet sent through the second backhaul link, or may be sent in the form of a control data packet (e.g., a null data packet only of the adaptation layer packet header);
if other bearing data packets exist on the first backhaul link, the adaptation layer adds a terminal identifier or a bearing identifier of the terminal corresponding to each bearing in the corresponding bearing and the packet header of the data packet adaptation layer with other bearing.
In one embodiment, as shown in fig. 5, after receiving feedback of a mapping establishment or update result of a previous hop relay node or a terminal, a relay node (i.e., a next hop relay node in the figure) may perform mapping establishment or update of the node.
Step 503: the relay node or terminal feeds back the mapping establishment or update result to the next hop relay node or donor base station.
Here, if feedback is fed back to the next hop relay node, the feedback at least supports transmission through the air interface Uu; and if the feedback is fed back to the donor base station, the feedback at least supports transmission through the F1-AP interface.
In one embodiment, the feedback may be included in the adaptation layer header of at least the first data packet sent over the first backhaul link, or in the form of a control data packet (e.g., a null data packet with only the adaptation layer header).
The next hop relay node may perform mapping establishment or updating after receiving the feedback.
Example two
In the embodiment of the invention, the donor base station notifies the path corresponding to the first bearing of the first terminal to be changed.
Step one: the donor base station indicates the identification of a first terminal and the identification of a first bearing which need to change the path and the identification of the next hop node of the first bearing to each relay node or terminal of the new path;
step two: the relay node or the terminal establishes or updates the mapping from the first bearing of the indicated first terminal to the return link between the indicated next hop nodes;
step three: the relay node or terminal feeds back the map establishment or update to the indicated next hop node.
The specific details of the steps are described in the above examples, and are not described in detail herein.
Example III
In the embodiment of the invention, the donor base station informs the QoS requirement corresponding to the first bearing of the first terminal.
Step one: the donor base station indicates the identification of a first terminal and the identification of a first bearing which need to meet the QoS requirement to a plurality of relay nodes or terminals, and the corresponding QoS requirement;
step two: the relay node or the terminal establishes or updates a mapping of the indicated first bearer of the first terminal to a backhaul link between the next hop nodes, wherein the backhaul link should meet the indicated QoS requirement;
step three: the relay node or terminal feeds back the map establishment or update to the indicated next hop node.
The specific details of the steps are described in the above examples, and are not described in detail herein.
According to the embodiment of the invention, the donor base station calculates or selects the optimal path and transmits the path information to the relay node or the terminal, and the adaptive layer of the relay node or the terminal performs the remapping operation from the DRB to the BH RLC channel according to the optimal path, so that the connection reconstruction among the relay node, the terminal and the donor base station is not needed, the path of the multi-hop relay network is optimized, the end-to-end communication quality is ensured, and the link load balancing of the relay network is realized.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention.
Claims (16)
1. The backhaul link remapping method is applied to a relay node or a terminal, and comprises the following steps:
receiving path information;
the relay node or the adaptation layer of the terminal determines a next hop relay node according to the path information, and when the first return link does not exist between the relay node or the adaptation layer of the terminal and the next hop relay node, a first return link establishment flow is initiated; or when the first backhaul link exists between the first backhaul link and the next hop relay node, but the mapping of the corresponding bearer to the first backhaul link does not exist, the mapping of the corresponding bearer to the first backhaul link is established or updated;
feeding back the result of the mapping establishment or updating to a next hop relay node or a donor base station;
when the first backhaul link exists between the determination and the next hop relay node, but there is no mapping of the corresponding bearer to the first backhaul link, the mapping of the corresponding bearer to the first backhaul link is established or updated, including one or more of the following:
the adaptation layer adds an adaptation layer address or an identification in a packet header of a data packet adaptation layer correspondingly loaded, and also adds an adaptation layer identification of a path;
the adaptation layer adds the special identification of the adaptation layer, which is obtained by the conversion of the address or identification of the adaptation layer and the identification of the adaptation layer of the path, in the packet header of the corresponding carried data packet adaptation layer;
When the fact that the mapping from the corresponding bearer to the second backhaul link exists is determined, the adaptation layer sends a data transmission completion indication through the second backhaul link after the mapping from the corresponding bearer to the first backhaul link is established or updated;
when it is determined that data packets of other bearers than the corresponding bearer already exist on the first backhaul link, the adaptation layer adds a terminal identifier or a bearer identifier of the terminal corresponding to each bearer in packet headers of the corresponding bearer and the data packet adaptation layer of the other bearers.
2. The method of claim 1, wherein the receiving path information comprises:
the relay node receives the path information at least through an F1-AP interface; or alternatively, the process may be performed,
and the terminal receives the path information at least through an air interface by Radio Resource Control (RRC) signaling.
3. The method according to claim 1, characterized in that the method further comprises:
and after receiving the result of the mapping establishment or updating of the previous hop relay node or the terminal, the relay node establishes or updates the mapping of the node.
4. The method of claim 1, wherein the path information includes at least one of:
An adaptation layer address or identity of a relay node or terminal as a communication destination;
an adaptation layer identification of a path to a communication destination;
the identification of the next hop relay node of the notified relay node or terminal;
a terminal identifier to which the path information is applicable;
and the bearing identifier of the terminal to which the path information is applicable.
5. The method of claim 4, wherein the path information further comprises one or more of the following:
priority of paths reaching the same destination;
the last hop relay node or terminal identification of the notified relay node;
and the QoS requirement information of the bearer to which the path information is applicable.
6. The method of claim 1, wherein the step of determining the position of the substrate comprises,
the first backhaul link meets the QoS requirements of the corresponding bearer; the respective bearers include at least one of:
all bearers of the current node;
all bearers of the one or more terminals indicated by the received path information;
one or more bearers of one or more terminals indicated by the received path information.
7. The method according to claim 1, wherein feeding back the result of the mapping establishment or update to a next hop relay node or donor base station comprises:
The result of the mapping establishment or update is contained in an adaptation layer packet header of at least a first data packet sent over a first backhaul link; or alternatively, the process may be performed,
the result of the map creation or update is sent in the form of a control data packet.
8. The method of claim 1, wherein the step of determining the position of the substrate comprises,
when the result of mapping establishment or updating is fed back to the next hop relay node, the result is at least sent through an air interface Uu;
and when the result of the mapping establishment or updating is fed back to the donor base station, the result is at least sent through an F1-AP interface.
9. A backhaul link remapping method, the method being applied to a donor base station, comprising:
transmitting path information;
receiving a result of mapping establishment or updating carried by the relay node or the terminal to the return link based on the path information;
the receiving the result of the mapping establishment or updating carried to the backhaul link by the relay node or the terminal based on the path information includes: the receiving relay node or the adaptation layer of the terminal determines a next hop relay node according to the path information, and when the first return link does not exist between the receiving relay node or the adaptation layer of the terminal and the next hop relay node, a first return link establishment flow is initiated; or when the first backhaul link exists between the relay node and the next hop relay node, but the mapping of the corresponding bearer to the first backhaul link does not exist, establishing or updating the result of the mapping of the corresponding bearer to the first backhaul link;
And when the first backhaul link exists between the determination and the next hop relay node, but no mapping of the corresponding bearer to the first backhaul link exists, establishing or updating the mapping of the corresponding bearer to the first backhaul link, wherein the mapping comprises one or more of the following steps:
the adaptation layer adds an adaptation layer address or an identification in a packet header of a data packet adaptation layer correspondingly loaded, and also adds an adaptation layer identification of a path;
the adaptation layer adds the special identification of the adaptation layer, which is obtained by the conversion of the address or identification of the adaptation layer and the identification of the adaptation layer of the path, in the packet header of the corresponding carried data packet adaptation layer;
when the fact that the mapping from the corresponding bearer to the second backhaul link exists is determined, the adaptation layer sends a data transmission completion indication through the second backhaul link after the mapping from the corresponding bearer to the first backhaul link is established or updated;
when it is determined that data packets of other bearers than the corresponding bearer already exist on the first backhaul link, the adaptation layer adds a terminal identifier or a bearer identifier of the terminal corresponding to each bearer in packet headers of the corresponding bearer and the data packet adaptation layer of the other bearers.
10. The method of claim 9, wherein the transmission path information comprises:
And sending the path information to at least one relay node or terminal.
11. The method of claim 10, wherein the step of determining the position of the first electrode is performed,
when the receiver of the path information is a relay node, the sending path information includes:
transmitting the path information at least through an F1-AP interface;
when the receiver of the path information is a terminal, the sending path information includes:
the path information is sent via radio resource control, RRC, signaling over at least the air interface.
12. The method according to claim 9, wherein the receiving the result of the relay node or the terminal performing the mapping establishment or updating of the bearer to the backhaul link based on the path information comprises:
and receiving a result of establishing or updating the mapping from the relay node or the terminal to the backhaul link based on the path information at least through the F1-AP interface.
13. A backhaul link remapping apparatus, the apparatus being applied to a relay node or a terminal, comprising:
the first receiving module is used for receiving the path information;
the mapping module is used for determining a next hop relay node by the relay node or an adaptation layer of the terminal according to the path information, and initiating a first backhaul link establishment flow when the first backhaul link does not exist between the next hop relay node and the next hop relay node; or when the first backhaul link exists between the first backhaul link and the next hop relay node, but the mapping of the corresponding bearer to the first backhaul link does not exist, the mapping of the corresponding bearer to the first backhaul link is established or updated;
The first sending module is used for feeding back the mapping establishment or updating result to the next hop relay node or the donor base station;
the mapping module is specifically configured to: the adaptation layer adds an adaptation layer address or an identification in a packet header of a data packet adaptation layer correspondingly loaded, and also adds an adaptation layer identification of a path;
the adaptation layer adds the special identification of the adaptation layer, which is obtained by the conversion of the address or identification of the adaptation layer and the identification of the adaptation layer of the path, in the packet header of the corresponding carried data packet adaptation layer;
when the fact that the mapping from the corresponding bearer to the second backhaul link exists is determined, the adaptation layer sends a data transmission completion indication through the second backhaul link after the mapping from the corresponding bearer to the first backhaul link is established or updated;
when it is determined that data packets of other bearers than the corresponding bearer already exist on the first backhaul link, the adaptation layer adds a terminal identifier or a bearer identifier of the terminal corresponding to each bearer in packet headers of the corresponding bearer and the data packet adaptation layer of the other bearers.
14. A backhaul link remapping apparatus, the apparatus being adapted for use in a donor base station, comprising:
the second sending module is used for sending the path information;
The second receiving module is used for receiving the result of the mapping establishment or updating carried by the relay node or the terminal to the return link based on the path information;
the second receiving module is specifically configured to: the receiving relay node or the adaptation layer of the terminal determines a next hop relay node according to the path information, and when the first return link does not exist between the receiving relay node or the adaptation layer of the terminal and the next hop relay node, a first return link establishment flow is initiated; or when the first backhaul link exists between the relay node and the next hop relay node, but the mapping of the corresponding bearer to the first backhaul link does not exist, establishing or updating the result of the mapping of the corresponding bearer to the first backhaul link;
and when the first backhaul link exists between the determination and the next hop relay node, but no mapping of the corresponding bearer to the first backhaul link exists, establishing or updating the mapping of the corresponding bearer to the first backhaul link, wherein the mapping comprises one or more of the following steps:
the adaptation layer adds an adaptation layer address or an identification in a packet header of a data packet adaptation layer correspondingly loaded, and also adds an adaptation layer identification of a path;
the adaptation layer adds the special identification of the adaptation layer, which is obtained by the conversion of the address or identification of the adaptation layer and the identification of the adaptation layer of the path, in the packet header of the corresponding carried data packet adaptation layer;
When the fact that the mapping from the corresponding bearer to the second backhaul link exists is determined, the adaptation layer sends a data transmission completion indication through the second backhaul link after the mapping from the corresponding bearer to the first backhaul link is established or updated;
when it is determined that data packets of other bearers than the corresponding bearer already exist on the first backhaul link, the adaptation layer adds a terminal identifier or a bearer identifier of the terminal corresponding to each bearer in packet headers of the corresponding bearer and the data packet adaptation layer of the other bearers.
15. A backhaul link remapping apparatus, the apparatus comprising: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor is adapted to perform the steps of the method of any of claims 1-8 or the steps of the method of any of claims 9-12 when the computer program is run.
16. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any one of claims 1-8 or the steps of the method of any one of claims 9-12.
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| CN101932102B (en) * | 2009-06-19 | 2013-01-23 | 华为技术有限公司 | Service bearing mapping method and communication equipment thereof |
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