CN112235877A - Return link remapping method, device and computer readable storage medium - Google Patents
Return link remapping method, device and computer readable storage medium Download PDFInfo
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- CN112235877A CN112235877A CN201910637406.3A CN201910637406A CN112235877A CN 112235877 A CN112235877 A CN 112235877A CN 201910637406 A CN201910637406 A CN 201910637406A CN 112235877 A CN112235877 A CN 112235877A
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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 return link remapping device and a computer readable storage medium, wherein the method comprises the following steps: a relay node or a terminal receives path information; establishing or updating mapping from the load to the return link based on the path information; and feeding back the mapping establishment or updating result to a next hop relay node or a donor base station.
Description
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to a method and an apparatus for remapping a backhaul link, and a computer-readable storage medium.
Background
With the emergence of endless data-type applications such as virtual reality and augmented reality, the capacity of the current mobile communication network cannot meet the demands of people more and more, and the network densification becomes an important means for increasing the network capacity. In order to further improve the utilization rate of spectrum resources, improve the network reliability, provide more accurate QoS management, load balancing and multi-path routing based on services, an Integrated Access Backhaul (IAB) technology is indispensable, and has great research value.
In the related art of the IAB, 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 an 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 DRB of the UE to the BH RLC channel. However, according to the related mechanism, the IAB node as the relay does not know the current network relay topology and load condition, that is, there is no path information from the next hop node to the donor base station or the terminal when selecting the next hop IAB node or deciding the DRB to BH RLC channel mapping. On one hand, when the relay topology changes due to the reasons of node movement and the like, the communication quality of an end-to-end path is difficult to guarantee; on the other hand, the path cannot be reasonably selected according to the link load, so that the link load is unbalanced. Due to the difference in QoS mechanisms, there is no mapping of DRB to BH rlcch in LTE, but similarly, Relay nodes have no path information from the next hop node to the last hop base station or terminal.
Disclosure of Invention
In view of the above, embodiments of the present invention are directed to a backhaul link remapping method, apparatus and computer-readable storage medium.
In order to achieve the above purpose, the technical solution of the embodiment of the present invention is realized 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;
establishing or updating mapping from the load to the return link based on the path information;
and feeding back the mapping establishment or updating result to a next hop relay node or a donor base station.
Wherein the receiving the path information includes:
the relay node receives the path information at least through a F1-AP interface; alternatively, the first and second electrodes may be,
and the terminal receives the path information at least through an air interface by Radio Resource Control (RRC) signaling.
Optionally, the method further includes:
and after receiving the mapping establishment or updating result of the previous hop relay node or the terminal, the relay node establishes or updates the mapping of the node.
Wherein the path information at least comprises one of the following information:
the adaptive layer address or identification of the relay node or terminal as a communication terminal;
an adaptation layer identification of a path to a communication end point;
the identity of the notified relay node or the next hop relay node of the terminal;
a terminal identifier to which the path information is applicable;
and the bearing identification of the terminal to which the path information is applicable.
Wherein the path information further comprises one or more of the following information:
priority of paths to the same destination;
the last hop relay node or terminal identification of the notified relay node;
quality of service, QoS, requirement information of a bearer to which the path information applies.
Wherein the establishing or updating of 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 carries out mapping establishment or updating of a load to the first loopback link; wherein the content of the first and second substances,
the first backhaul link meets the QoS requirement 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 for one or more terminals indicated by the received path information.
Wherein the establishing or updating the mapping from the bearer to the first backhaul link includes:
if the first loopback link does not exist between the first node and the next hop node, initiating a first loopback link establishment flow; alternatively, the first and second electrodes may be,
and if the first loopback link exists between the first node and the next hop node and the mapping of the corresponding bearer to the first loopback link does not exist, establishing or updating the mapping of the corresponding bearer to the first loopback link.
Wherein, if it is determined that a first backhaul link exists between the first backhaul link and the next hop node but there is no mapping from the corresponding bearer to the first backhaul link, the mapping from the corresponding bearer to the first backhaul link is established or updated, and the mapping includes one or more of the following:
the adaptation layer adds the adaptation layer address or mark in the packet head of the adaptation layer of the corresponding carried data packet, and also adds the adaptation layer mark of the path;
the adaptation layer adds the adaptation layer special mark obtained by the adaptation layer address or mark and the adaptation layer mark transformation of the path in the packet head of the corresponding loaded data packet adaptation layer;
when determining that the mapping from the corresponding bearer to the second backhaul link already exists, the adaptation layer sends a data transmission completion indication through the second backhaul link after establishing or updating the mapping from the corresponding bearer to the first backhaul link;
when determining that the data packet of other bearers other than the corresponding bearer exists on the first backhaul link, the adaptation layer adds the terminal identifier corresponding to each bearer or the bearer identifier of the terminal to the packet headers of the corresponding bearer and the data packets of the other bearers.
Wherein the feeding back the result of the mapping establishment or update to the next-hop relay node or the donor base station comprises:
the result of the mapping establishment or update is sent in an adaptation layer header of at least a first data packet sent over the first backhaul link; alternatively, the first and second electrodes may be,
the result of the mapping establishment or update is sent in the form of a control packet.
When the mapping establishment or updating result is fed back to the next hop relay node, the mapping establishment or updating result is at least sent through an air interface Uu;
and when the mapping establishment or updating result is fed back to the donor base station, the mapping establishment or updating 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 a donor base station and comprises the following steps:
transmitting the path information;
and 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.
Wherein the sending 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 a F1-AP interface;
when the receiver of the path information is a terminal, the sending path information includes:
and at least sending the path information through an air interface through Radio Resource Control (RRC) signaling.
Wherein, the receiving the result of the relay node or the terminal performing mapping establishment or update from the bearer to the backhaul link based on the path information includes:
and receiving the result of the mapping establishment or updating of the bearing to the backhaul link by the relay node or the terminal based on the path information at least through the F1-AP interface.
The embodiment of the present invention further provides a backhaul link remapping device, which is applied to a relay node or a terminal, and includes:
the first receiving module is used for receiving the path information;
the mapping module is used for establishing or updating mapping from the load 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 a donor base station and comprises the following steps:
the second sending module is used for sending the path information;
and the second receiving module is used for receiving the result of mapping establishment or updating from the relay node or the terminal to the return link based on the path information.
An embodiment of the present invention further provides a device for remapping a backhaul link, where the device includes: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor is configured to perform the steps of the above method when running the computer program.
Embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps of the above-mentioned method.
The embodiment of the invention provides a return link remapping method, a return link remapping device and a computer readable storage medium, wherein the method comprises the following steps: a relay node or a terminal receives path information; establishing or updating mapping from the load to the return link based on the path information; and feeding back the mapping establishment or updating result to a next hop relay node or a donor base station. The embodiment of the invention does not need the connection reconstruction among the relay node, the terminal and the donor base station, achieves the purposes of optimizing the multi-hop relay network path, ensuring the end-to-end communication quality and realizing the link load balancing of the relay network.
Drawings
Fig. 1 is a first flowchart illustrating a return link remapping method according to an embodiment of the invention;
fig. 2 is a second flowchart illustrating a return link remapping method according to an embodiment of the invention;
fig. 3 is a first schematic structural diagram of a return link remapping apparatus according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of a return link remapping apparatus according to an embodiment of the invention;
fig. 5 is a third flowchart illustrating a return link remapping method according to an embodiment of the invention.
Detailed Description
The invention is described below with reference to the figures and examples.
In the related art, in a 4g (lte) Relay network, Relay is classified according to a Relay policy as follows:
(1) the Type1Relay can independently control terminals in a certain cell range area and has independent cell identification and radio resource management mechanisms. From the terminal side, Type1Relay is a conventional eNodeB.
(2) Type 1aRelay has most of the features of Type1Relay, but the frequency spectrum used by the access link between its Relay and terminal and the backhaul link between eNodeB and Relay are different.
(3) Type1bRelay also has most of the features of Type1Relay, but its access link between Relay and terminal and backhaul link between eNodeB and Relay use the same spectrum. The Relay realizes that the Relay works on two links simultaneously without mutual interference through the physical isolation of the access link and the backhaul link.
(4) The Type2Relay has functions of an independent physical layer, an MAC layer, an RLC layer and the like, and has an independent or partial RRC function. Since the Type2Relay does not have an independent cell and an independent PCI, part of the control function is controlled by the eNodeB, that is, the Type2Relay only transmits the PDSCH but does not transmit the CRS and PDCCH.
It can be seen that since the 4g (lte) network does not support the architecture of CU/DU separation, the Relay node is either equivalent to the existence 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 a CU/DU separation architecture, so that an IAB node serving as a relay only needs to have a user plane function, and forwards user data of its child node to its parent node (uplink), or forwards user data of its parent node to its child node (downlink), so as to ensure 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 (named adaptation layer) is introduced above the RLC layer of the IAB node, and is responsible for mapping uplink data bearers (DRBs) of the UE and/or child 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 BH RLC channels connected to the UE and/or child 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 DRB to BH RLC channels is supported. However, according to the related mechanism, the IAB node as the relay does not know the current network relay topology and load condition, that is, there is no path information from the next hop node to the donor base station or the terminal when selecting the next hop IAB node or deciding the DRB to BH RLC channel mapping.
Therefore, an embodiment of the present invention provides a backhaul link remapping method, where the method is applied to a relay node or a terminal, and as shown in fig. 1, the method includes:
step 101: receiving path information;
step 102: establishing or updating mapping from the load to the return link based on the path information;
step 103: and feeding back the mapping establishment or updating result to a next hop relay node or a donor base station.
Therefore, the embodiment of the invention does not need the connection reconstruction among the relay node, the terminal and the donor base station, achieves the purposes of optimizing the multi-hop relay network path, ensuring the end-to-end communication quality and realizing the link load balancing of the relay network.
In this embodiment of the present invention, the receiving path information includes:
the relay node receives the path information at least through a F1-AP interface; alternatively, the first and second electrodes may be,
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 mapping establishment or updating result of the previous hop relay node or the terminal, the relay node establishes or updates the mapping of the node.
In this embodiment of the present invention, the path information at least includes one of the following information:
the adaptive layer address or identification of the relay node or terminal as a communication terminal;
an adaptation layer identification of a path to a communication end point;
the identity of the notified relay node or the next hop relay node of the terminal;
a terminal identifier to which the path information is applicable;
and the bearing identification 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 information:
priority of paths to the same destination;
the last hop relay node or terminal identification of the notified relay node;
quality of service, QoS, requirement information of a bearer to which the path information applies.
In one embodiment, 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 carries out mapping establishment or updating of a load to the first loopback link; wherein the content of the first and second substances,
the first backhaul link meets the QoS requirement 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 for one or more terminals indicated by the received path information.
In an embodiment, the performing mapping establishment or update of the bearer to the first backhaul link includes:
if the first loopback link does not exist between the first node and the next hop node, initiating a first loopback link establishment flow; alternatively, the first and second electrodes may be,
and if the first loopback link exists between the first node and the next hop node and the mapping of the corresponding bearer to the first loopback link does not exist, establishing or updating the mapping of the corresponding bearer to the first loopback link.
In one embodiment, if it is determined that the first backhaul link exists between the first backhaul link and the next hop node, but there is no mapping from the corresponding bearer to the first backhaul link, the establishing or updating the mapping from the corresponding bearer to the first backhaul link includes one or more of the following:
the adaptation layer adds the adaptation layer address or mark in the packet head of the adaptation layer of the corresponding carried data packet, and also adds the adaptation layer mark of the path;
the adaptation layer adds the adaptation layer special mark obtained by the adaptation layer address or mark and the adaptation layer mark transformation of the path in the packet head of the corresponding loaded data packet adaptation layer;
when determining that the mapping from the corresponding bearer to the second backhaul link already exists, the adaptation layer sends a data transmission completion indication through the second backhaul link after establishing or updating the mapping from the corresponding bearer to the first backhaul link;
when determining that the data packet of the other bearers other than the corresponding bearer exists on the first backhaul link, the adaptation layer adds, to the packet headers of the adaptation layers of the corresponding bearer and the other bearers, the terminal identifier or the bearer identifier of the terminal corresponding to each bearer (i.e., all bearers on the first backhaul link, including the corresponding bearer and the other bearers).
In one embodiment, the feeding back the result of establishing or updating the mapping to the next-hop relay node or the donor base station includes:
the result of the mapping establishment or update is sent in an adaptation layer header of at least a first data packet sent over the first backhaul link; alternatively, the first and second electrodes may be,
the result of the mapping establishment or update is sent in the form of a control packet.
In the embodiment of the present invention, when the result of the mapping establishment or update is fed back to the next-hop relay node, the result is sent at least through an air interface Uu;
and when the mapping establishment or updating result is fed back to the donor base station, the mapping establishment or updating result is at least sent through an F1-AP interface.
An embodiment of the present invention further provides a backhaul link remapping method, where the method is applied to a donor base station, as shown in fig. 2, and includes:
step 201: transmitting the path information;
step 202: and 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.
In one embodiment, the sending 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 a F1-AP interface;
when the receiver of the path information is a terminal, the sending path information includes:
and at least sending the path information through an air interface through Radio Resource Control (RRC) signaling.
In one embodiment, the receiving a result of the relay node or the terminal performing mapping establishment or update of the bearer to the backhaul link based on the path information includes:
and receiving the result of the mapping establishment or updating of the bearing to the backhaul link by the relay node or the terminal based on the path information at least through the F1-AP interface.
In order to implement the foregoing method embodiment, an embodiment of the present invention further provides a backhaul link remapping apparatus, where the apparatus is applied to a relay node or a terminal, and as shown in fig. 3, the apparatus includes:
a first receiving module 301, configured to receive path information;
a mapping module 302, configured to establish or update a mapping from a bearer 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 a F1-AP interface; alternatively, the first and second electrodes may be,
and receiving the path information by Radio Resource Control (RRC) signaling at least through an air interface.
In an embodiment, the mapping module 302 is further configured to perform mapping establishment or update of the relay node after the relay node receives a result of mapping establishment or update of the previous-hop relay node or the terminal.
In this embodiment of the present invention, the path information at least includes one of the following information:
the adaptive layer address or identification of the relay node or terminal as a communication terminal;
an adaptation layer identification of a path to a communication end point;
the identity of the notified relay node or the next hop relay node of the terminal;
a terminal identifier to which the path information is applicable;
and the bearing identification of the terminal to which the path information is applicable.
In one embodiment, the path information further includes one or more of the following information:
priority of paths to the same destination;
the last hop relay node or terminal identification of the notified relay node;
quality of service, QoS, requirement information of a bearer to which the path information applies.
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 carrying out mapping establishment or updating of a first loopback link; wherein the content of the first and second substances,
the first backhaul link meets the QoS requirement 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 for one or more terminals indicated by the received path information.
In one embodiment, the mapping module 302 performs mapping establishment or updating of the bearer to the first backhaul link, including:
if the first loopback link does not exist between the first node and the next hop node, initiating a first loopback link establishment flow; alternatively, the first and second electrodes may be,
and if the first loopback link exists between the first node and the next hop node and the mapping of the corresponding bearer to the first loopback link does not exist, establishing or updating the mapping of the corresponding bearer to the first loopback link.
In one embodiment, the mapping module 302 determines that a first backhaul link exists with a next hop node, but there is no mapping of a corresponding bearer to the first backhaul link, and then establishes or updates a mapping of a corresponding bearer to the first backhaul link, including one or more of:
the adaptation layer adds the adaptation layer address or mark in the packet head of the adaptation layer of the corresponding carried data packet, and also adds the adaptation layer mark of the path;
the adaptation layer adds the adaptation layer special mark obtained by the adaptation layer address or mark and the adaptation layer mark transformation of the path in the packet head of the corresponding loaded data packet adaptation layer;
when determining that the mapping from the corresponding bearer to the second backhaul link already exists, the adaptation layer sends a data transmission completion indication through the second backhaul link after establishing or updating the mapping from the corresponding bearer to the first backhaul link;
when determining that the data packet of other bearers other than the corresponding bearer exists on the first backhaul link, the adaptation layer adds the terminal identifier corresponding to each bearer or the bearer identifier of the terminal to the packet headers of the corresponding bearer and the data packets of the other bearers.
In one embodiment, the step of feeding back the result of establishing or updating the mapping to the next-hop relay node or the donor base station by the first sending module 303 includes:
the result of the mapping establishment or update is sent in an adaptation layer header of at least a first data packet sent over the first backhaul link; alternatively, the first and second electrodes may be,
the result of the mapping establishment or update is sent in the form of a control packet.
In one embodiment of the present invention,
when the mapping establishment or update result is fed back to the next-hop relay node, the first sending module 303 sends the mapping establishment or update result at least through an air interface Uu;
when the mapping establishment or update result is fed back to the donor base station, the first sending module 303 sends the mapping establishment or update result at least through the F1-AP interface.
An embodiment of the present invention further provides a backhaul link remapping apparatus, where the apparatus is applied to a donor base station, as shown in fig. 4, and the apparatus includes:
a second sending module 401, configured to send path information;
a second receiving module 402, configured to receive a result of mapping establishment or update of a bearer to a backhaul link performed by the relay node or the terminal based on the path information.
In one embodiment, the sending the path information by the second sending module 401 includes:
and sending the path information to at least one relay node or terminal.
In one embodiment of the present invention,
when the receiver of the path information is a relay node, the sending of the path information by the second sending module 401 includes:
transmitting the path information at least through a F1-AP interface;
when the receiver of the path information is a terminal, the sending of the path information by the second sending module 401 includes:
and at least sending the path information through an air interface through Radio Resource Control (RRC) signaling.
In one embodiment, the second receiving module 402 receives a result of the relay node or the terminal performing mapping establishment or update of the bearer to the backhaul link based on the path information, including:
and receiving the result of the mapping establishment or updating of the bearing to the backhaul link by the relay node or the terminal based on the path information at least through the F1-AP interface.
An embodiment of the present invention further provides a device for remapping a backhaul link, where the device includes: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor is configured to execute, when running the computer program:
receiving path information;
establishing or updating mapping from the load to the return link based on the path information;
and feeding back the mapping establishment or updating result to a next hop relay node or a donor base station.
When receiving the path information, the processor is further configured to execute, when running the computer program:
receiving the path information at least through a F1-AP interface; alternatively, the first and second electrodes may be,
and receiving the path information by Radio Resource Control (RRC) signaling at least through an air interface.
The processor is further configured to, when executing the computer program, perform:
and after receiving the mapping establishment or updating result of the previous hop relay node or the terminal, the relay node establishes or updates the mapping of the node.
When the mapping from the bearer to the backhaul link is established or updated based on the path information, the processor is further configured to execute, when the computer program is run, the following steps:
the adaptation layer determines a path and a next hop node according to the path information, and carries out mapping establishment or updating of the first loopback link; wherein the content of the first and second substances,
the first backhaul link meets the QoS requirement 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 for 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 processor is further configured to execute, when the computer program is run, the following steps:
if the first loopback link does not exist between the first node and the next hop node, initiating a first loopback link establishment flow; alternatively, the first and second electrodes may be,
and if the first loopback link exists between the first node and the next hop node and the mapping of the corresponding bearer to the first loopback link does not exist, establishing or updating the mapping of the corresponding bearer to the first loopback link.
If it is determined that a first backhaul link exists between the first backhaul link and the next hop node but there is no mapping from the corresponding bearer to the first backhaul link, when the mapping from 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 the computer program is run:
the adaptation layer adds the adaptation layer address or mark in the packet head of the adaptation layer of the corresponding carried data packet, and also adds the adaptation layer mark of the path;
the adaptation layer adds the adaptation layer special mark obtained by the adaptation layer address or mark and the adaptation layer mark transformation of the path in the packet head of the corresponding loaded data packet adaptation layer;
when determining that the mapping from the corresponding bearer to the second backhaul link already exists, the adaptation layer sends a data transmission completion indication through the second backhaul link after establishing or updating the mapping from the corresponding bearer to the first backhaul link;
when determining that the data packet of other bearers other than the corresponding bearer exists on the first backhaul link, the adaptation layer adds the terminal identifier corresponding to each bearer or the bearer identifier of the terminal to the packet headers of the corresponding bearer and the data packets of the other bearers.
When the result of establishing or updating the mapping is fed back to the next-hop relay node or the donor base station, the processor is further configured to execute, when running the computer program:
the result of the mapping establishment or update is sent in an adaptation layer header of at least a first data packet sent over the first backhaul link; alternatively, the first and second electrodes may be,
the result of the mapping establishment or update is sent in the form of a control packet.
The processor is further configured to, when executing the computer program, perform:
at least sending a mapping establishment or updating result to the next hop relay node through an air interface Uu; alternatively, the first and second electrodes may be,
and sending the mapping establishment or updating result back to the donor base station at least through the F1-AP interface.
An embodiment of the present invention further provides a device for remapping a backhaul link, where the device includes: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor is configured to execute, when running the computer program:
transmitting the path information;
and 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.
When the path information is sent, the processor is further configured to execute, when the computer program is run, the following steps:
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 mapping establishment or updating from the bearer to the backhaul link based on the path information, the processor is further configured to execute, when running the computer program:
and receiving the result of the mapping establishment or updating of the bearing to the backhaul link by the relay node or the terminal based on the path information at least through the F1-AP interface.
It should be noted that: in the apparatus provided in the foregoing embodiment, when performing the return link remapping, only the division of each program module is illustrated, and in practical applications, the processing distribution may be completed 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 above embodiments and the corresponding method embodiments belong to the same concept, and specific implementation processes thereof are described in the method embodiments and are not described herein again.
In an exemplary embodiment, the embodiment of the present invention also provides a computer-readable storage medium, which may be a Memory such as FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface Memory, optical disc, or CD-ROM; or may be a variety of devices including one or any combination of the above memories, such as a mobile phone, computer, tablet device, personal digital assistant, etc.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, performs:
receiving path information;
establishing or updating mapping from the load to the return link based on the path information;
and feeding back the mapping establishment or updating result to a next hop relay node or a donor base station.
When receiving the path information, the computer program further executes, when executed by the processor:
receiving the path information at least through a F1-AP interface; alternatively, the first and second electrodes may be,
and receiving the path information by Radio Resource Control (RRC) signaling at least through an air interface.
The computer program, when executed by the processor, further performs:
and after receiving the mapping establishment or updating result of the previous hop relay node or the terminal, the relay node establishes or updates the mapping of the node.
When the mapping establishment or update of the bearer to the backhaul link is performed based on the path information, when the computer program is executed by the processor, the computer program further performs:
the adaptation layer determines a path and a next hop node according to the path information, and carries out mapping establishment or updating of the first loopback link; wherein the content of the first and second substances,
the first backhaul link meets the QoS requirement 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 for one or more terminals indicated by the received path information.
When the mapping establishment or the updating of the bearer to the first backhaul link is performed, when the computer program is executed by the processor, the method further performs:
if the first loopback link does not exist between the first node and the next hop node, initiating a first loopback link establishment flow; alternatively, the first and second electrodes may be,
and if the first loopback link exists between the first node and the next hop node and the mapping of the corresponding bearer to the first loopback link does not exist, establishing or updating the mapping of the corresponding bearer to the first loopback link.
If it is determined that a first backhaul link exists between the first node 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, when the computer program is executed by the processor, the computer program further performs one or more of the following:
the adaptation layer adds the adaptation layer address or mark in the packet head of the adaptation layer of the corresponding carried data packet, and also adds the adaptation layer mark of the path;
the adaptation layer adds the adaptation layer special mark obtained by the adaptation layer address or mark and the adaptation layer mark transformation of the path in the packet head of the corresponding loaded data packet adaptation layer;
when determining that the mapping from the corresponding bearer to the second backhaul link already exists, the adaptation layer sends a data transmission completion indication through the second backhaul link after establishing or updating the mapping from the corresponding bearer to the first backhaul link;
when determining that the data packet of other bearers other than the corresponding bearer exists on the first backhaul link, the adaptation layer adds the terminal identifier corresponding to each bearer or the bearer identifier of the terminal to the packet headers of the corresponding bearer and the data packets of the other bearers.
When the result of establishing or updating the mapping is fed back to the next-hop relay node or the donor base station, when the computer program is executed by the processor, the method further performs:
the result of the mapping establishment or update is sent in an adaptation layer header of at least a first data packet sent over the first backhaul link; alternatively, the first and second electrodes may be,
the result of the mapping establishment or update is sent in the form of a control packet.
The computer program, when executed by the processor, further performs:
at least sending a mapping establishment or updating result to the next hop relay node through an air interface Uu; alternatively, the first and second electrodes may be,
and sending the mapping establishment or updating result back to the donor base station at least through the F1-AP interface.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, performs:
transmitting the path information;
and 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.
When the path information is sent, the computer program further executes, when executed by the processor:
and sending the path information to at least one relay node or terminal.
When the receiving relay node or the terminal performs a result of mapping establishment or updating of the bearer to the backhaul link based on the path information, and the computer program is executed by the processor, the method further performs:
and receiving the result of the mapping establishment or updating of the bearing to the backhaul link by the relay node or the terminal based on the path information at least through the F1-AP interface.
The invention is described below in conjunction with the scenario embodiments.
Example one
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 the 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 using any optimization algorithm according to the QoS requirement of the terminal or the terminal, and the link reachability and load between the governed relay nodes, so as to generate path information.
Wherein the path information at least comprises one of the following contents:
the adaptive layer address or identification of the relay node or terminal as a communication terminal;
an adaptation layer identification of a path to a communication end point;
the identity of the notified relay node or the next hop relay node of the terminal;
a terminal identification (UE ID) to which the path information is applicable;
bearer identification (UE bearer ID or UE DRB ID) of the terminal to which the path information applies.
Optionally, the path information may further include the following: priority of paths to the same destination; and informing the previous hop relay node or terminal identification of the relay node and the QoS requirement information of the bearer to which the path information is applicable.
If the receiver is a relay node, at least the path information is transmitted through an F1-wireless access point AP interface; if the receiver is a terminal, at least the path information is transmitted by an RRC signaling through an air interface.
Step 502: the relay node or the terminal receives the path information sent by the donor base station, and the adaptation layer carries out mapping establishment or updating from the bearing to the first backhaul link according to the path information;
wherein the relay node at least supports receiving path information through a F1-AP interface; the terminal supports at least receiving the path information through an air interface by RRC signaling.
Here, the adaptation layer of the relay node or the terminal determines the path and the next hop node according to the received path information, and performs mapping establishment or updating of the bearer to the first backhaul link:
1) and if the first loopback link does not exist between the first node and the next hop node, initiating a first loopback link establishment flow.
Wherein the first backhaul link should satisfy QoS requirements of a corresponding bearer.
The respective bearer is 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) certain one or more bearers of certain one or more terminals indicated by the received path information.
2) If a first backhaul link exists between the first backhaul link and the next hop node but no mapping from the corresponding bearer to the first backhaul link exists, establishing or updating a mapping from the corresponding bearer to the first backhaul link.
If there is a mapping from the corresponding bearer to another second backhaul link before, the adaptation layer may send a data transmission completion indication through the second backhaul link after establishing or updating the mapping from the corresponding bearer to the first backhaul link, where the indication may be sent in an adaptation layer header of a last data packet sent through the second backhaul link or sent in a control data packet (e.g., a null data packet with only an adaptation layer header);
if the data packets of other bearers exist on the first backhaul link, the adaptation layer adds the terminal identifier or the bearer identifier of the terminal corresponding to each bearer in the corresponding bearer and the packet header of the data packet adaptation layer in which other bearers exist.
In an embodiment, as shown in fig. 5, a relay node (i.e., a next-hop relay node in the figure) may perform mapping establishment or update of the relay node after receiving mapping establishment or update result feedback of a previous-hop relay node or a terminal.
Step 503: and the relay node or the terminal feeds back the mapping establishment or updating result to the next hop relay node or the donor base station.
Here, if feeding back to the next hop relay node, the feedback at least supports sending over an air interface Uu; if the feedback is fed back to the donor base station, the feedback at least supports sending through an F1-AP interface.
In one embodiment, the feedback may be included in an adaptation layer header of at least a first data packet transmitted over the first backhaul link, or in the form of a control data packet (e.g., a null data packet only in the adaptation layer header).
And the next hop relay node can perform mapping establishment or updating after receiving the feedback.
Example two
In the embodiment of the invention, the donor base station notifies the change of the path corresponding to the first bearer of the first terminal.
The method comprises the following steps: the donor base station indicates the identifier of a first terminal and the identifier of a first bearer which need to change the path and the identifier of a next hop node thereof 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 load of the indicated first terminal to the backhaul link between the indicated next hop nodes;
step three: and the relay node or the terminal feeds back mapping establishment or updating to the indicated next hop node.
The detailed steps are shown in the above embodiments, and are not detailed here.
EXAMPLE III
In the embodiment of the invention, the donor base station informs the QoS requirement corresponding to the first bearer of the first terminal.
The method comprises the following steps: the donor base station indicates the identification of a first terminal and the identification of a first load to a plurality of relay nodes or terminals, wherein the identification of the first terminal and the identification of the first load need to meet the QoS requirement, and the corresponding QoS requirement;
step two: the relay node or the terminal establishes or updates the mapping from the first load of the indicated first terminal to the return link between the next hop nodes, wherein the return link should meet the indicated QoS requirement;
step three: and the relay node or the terminal feeds back mapping establishment or updating to the indicated next hop node.
The detailed steps are shown in the above embodiments, and are not detailed here.
The embodiment of the invention calculates or selects the optimal path and transmits the path information to the relay node or the terminal through the donor base station, the adaptation 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 and does not need the connection reconstruction among the relay node, the terminal and the donor base station, thereby achieving the purposes of optimizing the path of the multi-hop relay network, ensuring the end-to-end communication quality and realizing the link load balancing of the relay network.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (18)
1. A backhaul link remapping method applied to a relay node or a terminal, comprising:
receiving path information;
establishing or updating mapping from the load to the return link based on the path information;
and feeding back the mapping establishment or updating result to a next hop relay node or a donor base station.
2. The method of claim 1, wherein the receiving path information comprises:
the relay node receives the path information at least through a F1-AP interface; alternatively, the first and second electrodes may be,
and the terminal receives the path information at least through an air interface by Radio Resource Control (RRC) signaling.
3. The method of claim 1, further comprising:
and after receiving the mapping establishment or updating result 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 comprises at least one of:
the adaptive layer address or identification of the relay node or terminal as a communication terminal;
an adaptation layer identification of a path to a communication end point;
the identity of the notified relay node or the next hop relay node of the terminal;
a terminal identifier to which the path information is applicable;
and the bearing identification 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:
priority of paths to the same destination;
the last hop relay node or terminal identification of the notified relay node;
quality of service, QoS, requirement information of a bearer to which the path information applies.
6. The method according to claim 1, wherein the performing mapping establishment or update of bearer to backhaul link based on the path information comprises:
the adaptation layer of the relay node or the terminal determines a path and a next hop node according to the path information, and carries out mapping establishment or updating of a load to the first loopback link; wherein the content of the first and second substances,
the first backhaul link meets the QoS requirement 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 for one or more terminals indicated by the received path information.
7. The method of claim 6, wherein the performing bearer-to-first backhaul link mapping establishment or update comprises:
if the first loopback link does not exist between the first node and the next hop node, initiating a first loopback link establishment flow; alternatively, the first and second electrodes may be,
and if the first loopback link exists between the first node and the next hop node and the mapping of the corresponding bearer to the first loopback link does not exist, establishing or updating the mapping of the corresponding bearer to the first loopback link.
8. The method of claim 6, wherein determining that a first backhaul link exists with a next hop node but no mapping of a corresponding bearer to the first backhaul link exists, establishing or updating a mapping of a corresponding bearer to the first backhaul link comprises one or more of:
the adaptation layer adds the adaptation layer address or mark in the packet head of the adaptation layer of the corresponding carried data packet, and also adds the adaptation layer mark of the path;
the adaptation layer adds the adaptation layer special mark obtained by the adaptation layer address or mark and the adaptation layer mark transformation of the path in the packet head of the corresponding loaded data packet adaptation layer;
when determining that the mapping from the corresponding bearer to the second backhaul link already exists, the adaptation layer sends a data transmission completion indication through the second backhaul link after establishing or updating the mapping from the corresponding bearer to the first backhaul link;
when determining that the data packet of other bearers other than the corresponding bearer exists on the first backhaul link, the adaptation layer adds the terminal identifier corresponding to each bearer or the bearer identifier of the terminal to the packet headers of the corresponding bearer and the data packets of the other bearers.
9. The method of claim 1, wherein the feeding back the mapping establishment or update result to a next-hop relay node or a donor base station comprises:
the result of the mapping establishment or update is sent in an adaptation layer header of at least a first data packet sent over the first backhaul link; alternatively, the first and second electrodes may be,
the result of the mapping establishment or update is sent in the form of a control packet.
10. The method of claim 1,
when the mapping establishment or updating result is fed back to the next hop relay node, the mapping establishment or updating result is at least sent through an air interface Uu;
and when the mapping establishment or updating result is fed back to the donor base station, the mapping establishment or updating result is at least sent through an F1-AP interface.
11. A method for backhaul link remapping, the method applied to a donor base station, comprising:
transmitting the path information;
and 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.
12. The method of claim 11, wherein the sending path information comprises:
and sending the path information to at least one relay node or terminal.
13. The method of claim 12,
when the receiver of the path information is a relay node, the sending path information includes:
transmitting the path information at least through a F1-AP interface;
when the receiver of the path information is a terminal, the sending path information includes:
and at least sending the path information through an air interface through Radio Resource Control (RRC) signaling.
14. The method according to claim 11, wherein the receiving relay node or the terminal performs the result of mapping establishment or update of the bearer to the backhaul link based on the path information, comprising:
and receiving the result of the mapping establishment or updating of the bearing to the backhaul link by the relay node or the terminal based on the path information at least through the F1-AP interface.
15. A backhaul link remapping apparatus, 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 establishing or updating mapping from the load 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.
16. A backhaul link remapping apparatus, for use in a donor base station, comprising:
the second sending module is used for sending the path information;
and the second receiving module is used for receiving the result of mapping establishment or updating from the relay node or the terminal to the return link based on the path information.
17. An apparatus for backhaul link remapping, 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 one of claims 1-10 or to perform the steps of the method of any one of claims 11-14 when running the computer program.
18. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 10 or carries out the steps of the method of any one of claims 11 to 14.
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