CN110769513B - Multi-hop relay resource allocation method and device - Google Patents
Multi-hop relay resource allocation method and device Download PDFInfo
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- CN110769513B CN110769513B CN201810852218.8A CN201810852218A CN110769513B CN 110769513 B CN110769513 B CN 110769513B CN 201810852218 A CN201810852218 A CN 201810852218A CN 110769513 B CN110769513 B CN 110769513B
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000013468 resource allocation Methods 0.000 title claims description 9
- 125000004122 cyclic group Chemical group 0.000 claims description 17
- 239000000969 carrier Substances 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- JZEPSDIWGBJOEH-UHFFFAOYSA-N 4-decylbicyclo[2.2.1]hept-2-ene Chemical compound C1CC2C=CC1(CCCCCCCCCC)C2 JZEPSDIWGBJOEH-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
Abstract
The application discloses a method and a device for distributing multi-hop relay resources, comprising the following steps: expanding and configuring Un port backhaul resources corresponding to a system relay RN backhaul subframe mode in advance according to a preset cycle period T, a cycle offset w and an available carrier; for each RN in the system, if the RN is not directly connected with the core network in a wired mode, after entering a UE mode, according to the principle that the same-frequency same-subframe and the different-frequency same-subframe are forbidden to be used when the RN is connected with an upper relay, the Un port backhaul resource used when the lower relay is connected is determined by utilizing the Un port backhaul resource obtained by the expansion configuration, and after entering an eNB mode, the determined Un port backhaul resource is broadcasted in a system message. The invention is suitable for multi-hop relay.
Description
Technical Field
The present invention relates to mobile communication technologies, and in particular, to a method and apparatus for allocating multi-hop relay resources.
Background
To improve coverage, increase cell edge throughput, and conduct temporary network deployment, 3GPP systems employ relay techniques. As shown in fig. 1, the relay node RN (Relay Node) accesses a Donor Cell (Donor Cell) under the control of the Donor ENB (Donor eNB) through a Un interface, and the UE accesses the RN through a Uu interface.
3GPP single-hop Relay, RN node takes on Uu port and Un port client end roles, and the time division multiplexing of the two resources is needed to be coordinated. The RN node functions as follows:
RN node: the Uu port is time division multiplexed with the Un port resources.
Uu: accessing the UE through a Uu port;
un: the RN uses the Un backhaul subframe to backhaul the data back to the DeNB.
Currently 3GPP only supports 1-hop in-band relay, but not multi-hop in-band relay. The networking of multi-hop relays is shown in fig. 2.
And under the multi-hop relay scene, the relay node bears a Uu port, an N-hop Un port and an N-1-hop Un port. The time division multiplexing of the three resources needs to be coordinated. The multi-hop RN functions as follows:
uu: accessing the UE through a Uu port;
un (N): receiving data of a previous jump Un port;
un (N-1): transmitting Uu port/previous-hop Un port data to a next-hop DeNB through Un;
in the multi-hop relay scene, in order to coordinate the Un resources and avoid interference, a plurality of groups of Un backhaul resources are needed. The existing 3GPP Un resources have coarse allocation granularity, and only 2 groups of Un backhaul resources are in TDD mode, so that the method is not suitable for multi-hop relay.
Disclosure of Invention
In view of the above, the present invention is mainly directed to a method and apparatus for allocating resources for multi-hop relay, which are suitable for multi-hop relay.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
a multi-hop relay resource allocation method comprises the following steps:
expanding and configuring Un port backhaul resources corresponding to a system relay RN backhaul subframe mode in advance according to a preset cycle period T, a cycle offset w and an available carrier;
for each RN in the system, if the RN is not directly connected with the core network in a wired mode, after entering a UE mode, according to the principle that the same-frequency same-subframe and the different-frequency same-subframe are forbidden to be used when the RN is connected with an upper relay, the Un port backhaul resource used when the lower relay is connected is determined by utilizing the Un port backhaul resource obtained by the expansion configuration, and after entering an eNB mode, the determined Un port backhaul resource is broadcasted in a system message.
A multi-hop relay resource allocation apparatus provided in a relay RN, comprising:
the pre-configuration unit is used for carrying out expansion configuration on the Un port backhaul resources corresponding to the system relay RN backhaul subframe mode in advance according to a preset cycle period T, a cycle offset w and an available carrier;
and the access configuration unit is used for determining the Un port backhaul resource used when the lower relay of the RN is accessed by utilizing the Un port backhaul resource obtained by the expansion configuration according to the principle of prohibiting the use of the same-frequency same subframe and different-frequency same subframe when the RN is accessed to the upper relay after the RN enters the UE mode when the RN is not directly connected with the core network, and broadcasting the determined Un port backhaul resource in a system message after the RN enters the eNB mode.
In summary, the method and the device for allocating the multi-hop relay resources according to the present invention utilize the cyclic period, the cyclic offset and the carrier resources to expand the Un port backhaul resources based on the existing RN backhaul subframe mode of the existing system, so that the Un port backhaul resources of multiple groups of time division can be utilized to meet the Un port transmission requirement of the multi-hop relay, avoid the mutual interference between the receiving and transmitting of the Un port of the same RN, and realize the Un port resource coordination and interference avoidance in the multi-hop relay scene. Therefore, the present invention is applicable to multi-hop relay.
Drawings
Fig. 1 is an access schematic diagram of a 3GPP system after a relay technology is adopted;
fig. 2 is a networking schematic diagram of a multi-hop relay;
FIG. 3 is a flow chart of a method according to an embodiment of the invention;
fig. 4 is a schematic diagram of a device structure according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and the embodiments, in order to make the objects, technical solutions and advantages of the present invention more apparent.
The core idea of the invention is that: and by adding the return period and the cyclic offset, the Un port return resources of the system are expanded, and in a multi-carrier scene, the Un port return resources of the same relay are forbidden to be used by two Un ports of the same frequency same subframe and different frequency same subframe, so that the transmission interference of the Un (N) port of the same relay to the reception of the Un (N) port is avoided, or vice versa.
Fig. 3 is a flow chart of a method according to an embodiment of the present invention, and as shown in fig. 3, a multi-hop relay resource allocation method implemented in this embodiment mainly includes:
step 301, performing expansion configuration on Un port backhaul resources corresponding to a backhaul subframe mode of a system relay RN according to a preset cycle period T, a cycle offset w and an available carrier in advance.
Specifically, the Un-port backhaul resource may be a TDD Un-port backhaul resource or an FDD Un-port backhaul resource.
The method is used for further expanding Un port backhaul resources based on the existing RN backhaul subframe mode of the existing system, namely, resource allocation granularity is refined by enlarging backhaul period, introducing cyclic offset and carrier resources, so that multi-hop relay can utilize a plurality of groups of time-division Un backhaul resources, and therefore the Un port transmission requirements under a multi-hop relay scene can be met.
For example, for a 3GPP FDD RN backhaul subframe: subframe configuration fdd is periodic with 8 ms. The backhaul resources are grouped into 8 groups. In this embodiment, each of the 8 groups of resources of 3GPP FDD SubframeConfigurationFDD minutes is subdivided, and the frequency domain carrier number is added.
For the 3GPP TDD RN backhaul subframe, subframe configuration TDD is periodic with 10 ms. The backhaul resources are divided into 1 group or 2 groups. In this embodiment, each of 1 to 2 groups of resources of 3GPP TDD SubframeConfigurationTDD minutes may be subdivided and the frequency domain carrier number added.
Preferably, the expansion configuration may be performed by the following method:
and for each available carrier wave in the system, determining the Un port backhaul subframe resource corresponding to the carrier wave in one cycle period according to the cycle period T and the cycle offset w. Further, the following method may be adopted to determine the Un-port backhaul subframe resource corresponding to the available carrier in a cycle period:
and for each group of Un port backhaul subframes on one radio frame in the system, carrying out w times of cyclic offset on the group of backhaul subframes in one cyclic period, and setting the obtained w groups of subframes as w groups of Un port backhaul subframes corresponding to the corresponding available carrier in the cyclic period.
In practical applications, the cyclic period T, the cyclic offset w, and the available carriers may be set by those skilled in the art according to actual needs. For example, in the TDD system, the subframe offset is 10ms, where the cyclic period T, n is a natural number, and w is equal to or less than n may be configured according to t=n×10ms; in the FDD system, the cyclic period T may be configured with t=n×8ms, where the subframe offset is 8 ms.
The parameters can be sent to the RN in a pre-configured mode or stored in a network management server in a centralized mode, and then sent to the RN when the RN is started.
Step 302, for each RN in the system, if the RN is not directly connected with the core network in a wired manner, after entering the UE mode, according to the principle of prohibiting the use of the same-frequency same subframe and different-frequency same subframe when accessing to the upper relay, determining the Un port backhaul resource used when accessing to the lower relay by using the Un port backhaul resource obtained by the expansion configuration, and broadcasting the determined Un port backhaul resource in the system message after entering the eNB mode.
In step 302, in order to avoid interfering with Un (N) port reception with Un (N-1) transmission of the RN, or vice versa, in the RN supporting multi-carrier scenario. It is necessary to restrict that two Un ports with RN cannot use the same subframe Pattern (Pattern) resource of the same frequency or different frequencies. Therefore, the Un port backhaul resource used when the lower relay is accessed needs to be determined by using the Un port backhaul resource obtained by expanding the configuration in step 301 according to the principle that the same frequency same subframe and different frequency same subframe are forbidden to be used when the upper relay is accessed.
Preferably, in order to reduce the interference between two Un ports with the RN as much as possible, the Un port backhaul resource used when the lower relay accesses can be determined according to the principle of using different frequency and different subframe when the upper relay accesses preferentially. The following RN Un port resource selection principle can be adopted in a multi-carrier scenario:
preferably: different frequency and different subframe resources are used when the upper relay is accessed;
suboptimal: resources of the same-frequency different sub-frames as resources used when accessing to the upper relay;
inhibit selection: the same frequency same subframe or different frequency same subframe resource is used when the upper relay is accessed.
Specifically, the Un-port backhaul resource may be a TDD Un-port backhaul resource or an FDD Un-port backhaul resource.
Fig. 4 is a multi-hop relay resource allocation apparatus corresponding to the above method, provided in a relay RN, as shown in fig. 4, and including:
the pre-configuration unit is used for carrying out expansion configuration on the Un port backhaul resources corresponding to the system relay RN backhaul subframe mode in advance according to a preset cycle period T, a cycle offset w and an available carrier;
and the access configuration unit is used for determining the Un port backhaul resource used when the lower relay of the RN is accessed by utilizing the Un port backhaul resource obtained by the expansion configuration according to the principle of prohibiting the use of the same-frequency same subframe and different-frequency same subframe when the RN is accessed to the upper relay after the RN enters the UE mode when the RN is not directly connected with the core network, and broadcasting the determined Un port backhaul resource in a system message after the RN enters the eNB mode.
Preferably, the pre-configuration unit is configured to determine, for each available carrier in the system, a Un port backhaul subframe resource corresponding to the carrier in one cycle period according to the cycle period T and the cycle offset w; the determining includes: and for each group of Un port backhaul subframes on one radio frame in the system, carrying out w times of cyclic offset on the group of backhaul subframes in one cyclic period, and setting the obtained w groups of subframes as w groups of Un port backhaul subframes corresponding to the corresponding available carrier in the cyclic period.
Preferably, the Un port backhaul resource used when the lower relay accesses is determined according to the principle of using different frequency and different subframe when the upper relay accesses preferentially.
Preferably, the Un port backhaul resource is a TDD Un port backhaul resource or an FDD Un port backhaul resource.
In summary, the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A multi-hop relay resource allocation method, comprising:
expanding and configuring Un port backhaul resources corresponding to a system relay RN backhaul subframe mode in advance according to a preset cycle period T, a cycle offset w and an available carrier;
for each RN in the system, if the RN is not directly connected with the core network in a wired mode, after entering a UE mode, according to the principle that the same-frequency same subframe and the different-frequency same subframe are forbidden to be used when the RN is connected with an upper relay, determining a Un port backhaul resource used when a lower relay is connected with the RN by utilizing the Un port backhaul resource obtained by the expansion configuration, and broadcasting the determined Un port backhaul resource in a system message after entering an eNB mode;
wherein the extended configuration comprises:
for each available carrier wave in the system, determining a Un port backhaul subframe resource corresponding to the carrier wave in one cycle period according to the cycle period T and the cycle offset w;
the determining includes:
and for each group of Un port backhaul subframes on one radio frame in the system, carrying out w times of cyclic offset on the group of backhaul subframes in one cyclic period, and setting the obtained w groups of subframes as w groups of Un port backhaul subframes corresponding to the corresponding available carrier in the cyclic period.
2. The method of claim 1 wherein the Un port backhaul resources used in accessing the lower level relay are determined in accordance with a principle of using different frequency and different subframes in priority and accessing the upper level relay.
3. The method of claim 1, wherein the Un-port backhaul resource is a TDD Un-port backhaul resource or an FDD Un-port backhaul resource.
4. A multi-hop relay resource allocation apparatus provided in a relay RN, comprising:
the pre-configuration unit is used for carrying out expansion configuration on the Un port backhaul resources corresponding to the system relay RN backhaul subframe mode in advance according to a preset cycle period T, a cycle offset w and an available carrier; comprising the following steps: for each available carrier wave in the system, determining a Un port backhaul subframe resource corresponding to the carrier wave in one cycle period according to the cycle period T and the cycle offset w; the determining includes: for each group of Un port backhaul subframes on a radio frame in a system, in a cycle period, performing w cycle offsets on the group of backhaul subframes, and setting the obtained w groups of subframes as w groups of Un port backhaul subframes corresponding to corresponding available carriers in the cycle period; wherein, when in a TDD system, t=n×10ms; w is less than or equal to n;
and the access configuration unit is used for determining the Un port backhaul resource used when the lower relay of the RN is accessed by utilizing the Un port backhaul resource obtained by the expansion configuration according to the principle of prohibiting the use of the same-frequency same subframe and different-frequency same subframe when the RN is accessed to the upper relay after the RN enters the UE mode when the RN is not directly connected with the core network, and broadcasting the determined Un port backhaul resource in a system message after the RN enters the eNB mode.
5. The apparatus of claim 4 wherein the Un port backhaul resources used in accessing the lower level relay are determined based on a principle of priority and using different frequency and different subframes in accessing the upper level relay.
6. The apparatus of claim 4, wherein the Un-port backhaul resource is a TDD Un-port backhaul resource or an FDD Un-port backhaul resource.
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| CN102484511A (en) * | 2009-10-04 | 2012-05-30 | 上海贝尔股份有限公司 | Method and apparatus for determining the inter-cell interference in a wireless relay network |
| CN102652440A (en) * | 2010-02-11 | 2012-08-29 | 上海贝尔股份有限公司 | Method and device for determining communication resources in relay network |
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| US9107228B2 (en) * | 2010-06-17 | 2015-08-11 | Nec Corporation | Radio communication system and control method of radio resource allocation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102484511A (en) * | 2009-10-04 | 2012-05-30 | 上海贝尔股份有限公司 | Method and apparatus for determining the inter-cell interference in a wireless relay network |
| CN102652440A (en) * | 2010-02-11 | 2012-08-29 | 上海贝尔股份有限公司 | Method and device for determining communication resources in relay network |
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