CN105827275B - Frequency hopping method and device for inter-cell interference elimination - Google Patents
Frequency hopping method and device for inter-cell interference elimination Download PDFInfo
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Abstract
The invention relates to a frequency hopping method and a frequency hopping device for inter-cell interference cancellation in first network equipment. The method includes transmitting frequency hopping information to a second network device, the frequency hopping information including resource allocation information, the resource allocation information including at least one of power allocation information, scheduling allocation information, and beamforming allocation information. The frequency hopping information also includes frequency hopping configuration information including frequency hopping initial subframe information, initial resource allocation information associated with the frequency hopping initial subframe, and frequency hopping parameters. The invention also proposes a method and an arrangement in a first network device for avoiding interference fluctuations caused by frequency hopping, comprising selecting or reconstructing channel state information corresponding to a current resource for scheduling a user equipment based on at least one channel state information from said user equipment. The scheme of the invention realizes the random frequency hopping among the sub-frames and simultaneously ensures the stability of the inter-cell interference elimination information during the frequency hopping.
Description
Technical Field
The present invention relates generally to the field of communications, and in particular, to a frequency hopping method and apparatus for eliminating inter-cell interference in the field of communications.
Background
In conventional static or semi-static resource allocation, such as static or semi-static intercell interference cancellation/enhanced intercell interference cancellation, the resource allocation may change after minutes, hours or days, or may be fixed at the time of network deployment. Thus, the preferred scheduling area for the aggressed user equipment (e.g., the interfered user equipment) may be limited to a few fixed subcarriers for a long time, and thus, the frequency selective gain may be greatly reduced. To maximize the frequency selective gain of the victim user equipment, the frequency selective gain can be achieved by frequency hopping. However, frequency hopping of resource allocations can lead to problems with interference fluctuations. Therefore, it is very beneficial to design a frequency hopping method for inter-cell interference cancellation while avoiding interference fluctuation.
Disclosure of Invention
The problem to be solved by the invention is the frequency hopping problem in semi-static resource allocation allowing multiple nodes to cooperate for inter-cell interference cancellation.
According to a first aspect of the present invention, there is provided a frequency hopping method for inter-cell interference cancellation in a first network device, comprising: and sending frequency hopping information to the second network equipment, wherein the frequency hopping information comprises resource allocation information, and the resource allocation information comprises at least one of power allocation information, scheduling allocation information and beam forming allocation information.
According to one embodiment of the invention, the resource allocation information is hopped after a predetermined period of time.
According to an embodiment of the present invention, the frequency hopping information further includes frequency hopping configuration information, which includes frequency hopping initial subframe information, initial resource allocation information associated with the frequency hopping initial subframe, and a frequency hopping parameter.
According to an embodiment of the present invention, the frequency hopping method further includes: receiving second frequency hopping information from a second network device, the second frequency hopping information including second resource allocation information, the second resource allocation information including at least one of second power allocation information, second scheduling allocation information, and second beamforming allocation information.
According to one embodiment of the invention, the second resource allocation information is hopped after a predetermined time period.
According to an embodiment of the present invention, the second frequency hopping information further includes second frequency hopping configuration information including second frequency hopping initial subframe information, second initial resource allocation information associated with the second frequency hopping initial subframe, and second frequency hopping parameters.
According to one embodiment of the invention, the resource allocation information is transmitted in a coordinated multi-point information signaling, an enhanced relative narrowband transmit power signaling or a relative narrowband transmit power signaling.
According to a second aspect of the present invention, there is provided a method for avoiding interference fluctuation in a first network device, comprising any one of the frequency hopping methods according to the first aspect of the present invention, further comprising: transmitting at least one piece of channel state information measurement configuration information to a user equipment, each piece of CSI measurement configuration information being associated with its corresponding interference hypothesis; receiving at least one channel state information from the user equipment, each of the at least one channel state information being measured based on a corresponding channel state information measurement configuration information; and selecting channel state information corresponding to a current resource to schedule the user equipment based on the at least one channel state information from the user equipment.
According to an embodiment of the present invention, the at least one channel state information measurement configuration information is associated with a specific interference hypothesis, and the specific interference hypothesis is that a strong interferer of the interference measurement resources of the user equipment is in a silent state.
According to an embodiment of the present invention, the method further includes reconstructing channel state information matching the interference state of the current resource to schedule the user equipment based on the at least one channel state information from the user equipment and the interference state of the current resource.
According to a third aspect of the present invention, there is provided a frequency hopping apparatus for inter-cell interference cancellation, comprising: a transmitting unit, configured to transmit frequency hopping information to the second network device, where the frequency hopping information includes resource allocation information, and the resource allocation information includes at least one of power allocation information, scheduling allocation information, and beamforming allocation information.
According to one embodiment of the invention, the resource allocation information is hopped after a predetermined period of time.
According to an embodiment of the present invention, the frequency hopping information further includes frequency hopping configuration information, which includes frequency hopping initial subframe information, initial resource allocation information associated with the frequency hopping initial subframe, and a frequency hopping parameter.
According to an embodiment of the present invention, further comprising: a receiving unit, configured to receive second frequency hopping information from a second network device, where the second frequency hopping information includes second resource allocation information, and the second resource allocation information includes at least one of second power allocation information, second scheduling allocation information, and second beamforming allocation information.
According to one embodiment of the invention, the second resource allocation information is hopped after a predetermined time period.
According to an embodiment of the present invention, the second frequency hopping information further includes second frequency hopping configuration information including second frequency hopping initial subframe information, second resource allocation information associated with the second frequency hopping initial subframe, and second frequency hopping parameters.
According to a fourth aspect of the present invention, there is provided an apparatus for avoiding interference fluctuation, comprising the frequency hopping apparatus of any one of the three aspects of the present invention, further comprising: a first transmitting unit, configured to transmit at least one channel state information measurement configuration information to a user equipment, each of the channel state information measurement configuration information being associated with its respective interference hypothesis; a first receiving unit, configured to receive at least one piece of channel state information from the user equipment, where each of the at least one piece of channel state information is measured based on corresponding channel state information measurement configuration information; and a first scheduling unit for selecting channel state information corresponding to a current resource to schedule the user equipment based on the at least one channel state information from the user equipment.
According to an embodiment of the present invention, the at least one channel state information measurement configuration information is associated with a specific interference hypothesis, and the specific interference hypothesis is that a strong interferer of the interference measurement resources of the user equipment is in a silent state.
According to an embodiment of the present invention, the fourth aspect of the present invention further includes a second scheduling unit, configured to reconstruct, based on the at least one piece of channel state information from the user equipment and the interference state of the current resource, channel state information matching the interference state of the current resource, and schedule the user equipment.
By using the scheme of the invention, the random frequency hopping among the sub-frames is realized, and the stability of the inter-cell interference elimination information is ensured during the frequency hopping.
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The invention will be better understood and other objects, details, features and advantages thereof will become more apparent after a description of specific embodiments thereof has been given by reference to the following drawings.
FIG. 1 shows a schematic diagram of dynamic frequency hopping according to an embodiment of the invention;
FIG. 2 is a schematic diagram illustrating the structure of resource allocation of a frequency hopping mechanism according to an embodiment of the present invention;
FIG. 3 illustrates a scenario diagram of centralized frequency hopping;
fig. 4 shows a frequency hopping flow diagram for centralized inter-cell interference cancellation according to one embodiment of the invention;
fig. 5 shows a frequency hopping flow diagram for centralized inter-cell interference cancellation according to another embodiment of the invention;
FIG. 6 illustrates a diagram of a distributed frequency hopping scenario;
fig. 7 shows a frequency hopping flow diagram for distributed inter-cell interference cancellation according to an embodiment of the invention;
fig. 8 shows a frequency hopping flow diagram for distributed inter-cell interference cancellation according to another embodiment of the present invention;
fig. 9 shows a frequency hopping flow diagram for distributed inter-cell interference cancellation according to yet another embodiment of the invention;
figure 10 shows a schematic diagram of avoiding inter-cell interference fluctuations according to one embodiment of the invention;
fig. 11 shows a schematic diagram of avoiding inter-cell interference fluctuations according to another embodiment of the invention;
fig. 12 shows a schematic diagram of a frequency hopping arrangement for inter-cell interference cancellation according to an embodiment of the invention; and
fig. 13 shows a schematic diagram of an arrangement for avoiding interference fluctuations according to an embodiment of the invention.
Wherein like or similar reference numerals refer to like or similar step features/means (modules).
Detailed Description
In the following detailed description of the preferred embodiments, reference is made to the accompanying drawings which form a part hereof. The accompanying drawings illustrate, by way of example, specific embodiments in which the invention may be practiced. The illustrated embodiments are not intended to be exhaustive of all embodiments according to the invention. It should be noted that although the steps of methods of the present invention are depicted in the drawings in a particular order, this does not require or imply that these operations must be performed in this particular order, or that all of the illustrated operations must be performed, to achieve desirable results, but rather that the steps described herein can be performed in an order that varies. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions.
Fig. 1 shows a dynamic frequency hopping scheme according to an embodiment of the present invention, in fig. 1, if node # 2 is limited in transmit power (e.g., zero power or low power) on certain resources, then these resources have a higher priority to be scheduled for node # 1. Through the dynamic frequency hopping mechanism described in the present invention, an affected User Equipment (UE), for example, UE #1, has more opportunities to be scheduled on protected resources (e.g., higher priority resources in a preferential scheduling region) in the frequency domain, thereby maximizing the frequency selective gain of the affected User Equipment.
Fig. 2 shows a schematic structural diagram of resource allocation of a frequency hopping mechanism according to an embodiment of the present invention.
As shown in FIG. 2, operations between cooperating nodes include, but are not limited to: generation/configuration of frequency hopping sequences, Channel state Information-Reference Signal (CSI-RS) configuration between cooperating nodes, and resource allocation for inter-cell interference cancellation. Operations in a single node include, but are not limited to: resource allocation for frequency hopping, CSI selection or reconstruction from resource allocation for a particular subframe, and user selection, precoding and modulation coding selection. Operations between the node and the user equipment include, but are not limited to: CSI/Reference Signal Receiving Power (RSRP) reporting configuration from node to UE, CSI/RSRP reporting from UE to node, and UE scheduling and traffic data/signaling transmission.
Fig. 3 shows a scenario of centralized frequency hopping, in fig. 3, a central controller controls one or more base stations. Although fig. 3 only shows a base station a and a base station B, for clarity of description, the embodiment of the centralized scenario of the present invention takes two base stations as an example to illustrate the technical solution of the present invention, and those skilled in the art should understand that the frequency hopping mechanism of the present invention based on the centralized scenario can be applied to more than two base stations.
Fig. 4 shows a frequency hopping flow diagram for centralized inter-cell interference cancellation according to one embodiment of the invention.
In step S410, the central controller 401 sets resource allocation information for the base station 402 and transmits the set resource allocation information to the base station 402. The resource allocation information includes at least one of power allocation information, user scheduling allocation information and/or beamforming allocation information.
The resource allocation information may hop after a predetermined period of time. For example, the resource information sub may be different at the time of the subframe t and at the time of the subframe t + 2.
In step S420, after receiving the resource allocation information from the central controller 401, the base station 402 performs corresponding resource allocation to the user equipment according to the received resource configuration information.
Fig. 5 shows a frequency hopping flow diagram for centralized inter-cell interference cancellation according to another embodiment of the invention.
In step S510, the central controller 501 sets resource allocation information and frequency hopping configuration information for the base station 502, and transmits the set resource allocation information frequency hopping configuration information to the base station 502. The resource allocation information includes at least one of power allocation information, user scheduling allocation information and/or beamforming allocation information. The hopping configuration information may include hopping initial subframe information, initial resource allocation information associated with the hopping initial subframe, and hopping parameters.
In step S520, after receiving the resource allocation information and the frequency hopping configuration information from the central controller 401, the base station 502 performs corresponding resource allocation to the user equipment according to the received resource allocation information and frequency hopping configuration information.
According to the resource configuration information and the frequency hopping configuration information, the central controller 501 and the base station 502 can search or calculate the resource allocation condition of the subsequent sub-frame.
The resource allocation Information as in fig. 4 and 5 may be transmitted in a coordinated multi-point Information (CoMP Information) signaling (e.g., CoMP hypothesis signaling) based on, for example, an X2 interface, a Relative Narrowband transmit Power signaling (RNTP: Relative Narrowband TX Power), or an enhanced Relative Narrowband transmit Power signaling (eRNTP: enhanced RNTP). The resource allocation information may also be transmitted in any other suitable control signaling.
Fig. 6 shows a scenario diagram of distributed frequency hopping, and in fig. 6, information interaction is performed between a base station a and a base station B to implement the frequency hopping scheme of the present invention. Although fig. 6 only shows a base station a and a base station B, for clarity of description, the embodiment of the distributed scenario of the present invention takes two base stations as an example to illustrate the technical solution of the present invention, and those skilled in the art should understand that the frequency hopping mechanism of the present invention based on the distributed scenario can be applied to more than two base stations.
Fig. 7 shows a frequency hopping flow diagram for distributed inter-cell interference cancellation according to an embodiment of the invention.
In step S710, the base station 701 transmits its resource allocation information to the base station 702. The resource allocation information may include at least one of power allocation information, user scheduling allocation information and/or beamforming allocation information. The resource allocation information may hop after a predetermined period of time. For example, the resource information sub may be different at the time of the subframe t and at the time of the subframe t + 2.
In step S720, the base station 702 receives the resource allocation information from the base station 701, and then transmits the resource allocation information of the base station 702 to the base station 701.
In step S730, after the base station 702 receives the resource allocation information from the base station 701, the base station 702 performs corresponding resource allocation according to the existing resource allocation information.
In step S740, after the base station 701 receives the resource allocation information from the base station 702, the base station 701 performs corresponding resource allocation according to the existing resource allocation information.
Fig. 8 shows a frequency hopping flow diagram for distributed inter-cell interference cancellation according to another embodiment of the present invention.
In step S810, the base station 801 transmits resource allocation information and frequency hopping configuration information of the base station 801 to the base station 802. The resource allocation information may include at least one of power allocation information, user scheduling allocation information and/or beamforming allocation information of the base station 801. The frequency hopping configuration information may include frequency hopping initial subframe information of the base station 801, initial resource allocation information associated with the frequency hopping initial subframe, and frequency hopping parameters.
In step S820, the base station 802 receives the resource allocation information from the base station 801, and then transmits the resource allocation information and the frequency hopping configuration information of the base station 802 to the base station 801. The resource allocation information may include at least one of power allocation information, user scheduling allocation information, and/or beamforming allocation information of the base station 802. The frequency hopping configuration information may include frequency hopping initial subframe information of the base station 802, initial resource allocation information and frequency hopping parameters associated with the frequency hopping initial subframe.
In step S830, after the base station 802 receives the resource allocation information and the frequency hopping configuration information from the base station 801, the base station 802 performs corresponding resource allocation according to the existing resource allocation information.
In step S840, after the base station 801 receives the resource allocation information and the frequency hopping configuration information from the base station 802, the base station 801 performs corresponding resource allocation according to the existing resource allocation information.
According to the existing resource allocation information and frequency hopping configuration information, the base station 801 and the base station 802 can search or calculate the resource allocation condition of each subsequent subframe.
Fig. 9 shows a frequency hopping flow diagram for distributed inter-cell interference cancellation according to yet another embodiment of the present invention.
In step S910, resource allocation coordination is performed between base station 901 and base station 902.
In step S920, the base station 901 transmits resource allocation information and frequency hopping configuration information of the base station 901 to the base station 902. The resource allocation information may include at least one of power allocation information, user scheduling allocation information and/or beamforming allocation information of the base station 901. The hopping configuration information may include hopping initial subframe information of the base station 901, initial resource allocation information and hopping parameters associated with the hopping initial subframe.
In step S930, the base station 902, after receiving the resource allocation information from the base station 901, transmits the resource allocation information and the frequency hopping configuration information of the base station 902 to the base station 901. The resource allocation information may include at least one of power allocation information, user scheduling allocation information, and/or beamforming allocation information for base station 902. The frequency hopping configuration information may include frequency hopping initial subframe information of the base station 802, initial resource allocation information and frequency hopping parameters associated with the frequency hopping initial subframe.
In step S940, after the base station 902 receives the resource allocation information and the frequency hopping configuration information from the base station 901, the base station 902 performs corresponding resource allocation according to the existing resource allocation information.
In step S950, after the base station 901 receives the resource allocation information and the frequency hopping configuration information from the base station 902, the base station 901 performs corresponding resource allocation according to the existing resource allocation information.
According to the existing resource allocation information and frequency hopping configuration information, the base stations 901 and 902 can search or calculate the resource allocation condition of the respective subsequent sub-frame.
The resource allocation Information of base stations 901/902, base stations 901/901 may be transmitted in multi-point cooperation Information (CoMP Information) signaling (e.g., CoMP hypothesis signaling), Relative Narrowband transmit Power signaling (RNTP: Relative Narrowband TX Power), or enhanced Relative Narrowband transmit Power signaling (eRNTP: enhanced RNTP) based on, for example, the X2 interface, as in base stations 701/702, 801/802 in fig. 7-9. The resource allocation information may also be transmitted in any other suitable control signaling.
The frequency hopping of the resource allocation brings about, on the one hand, a frequency selective gain and, on the other hand, also strong interference fluctuations. Therefore, it is necessary to consider how to avoid interference fluctuation while performing frequency hopping of resource allocation.
According to an embodiment of the present invention, while the network device adopts the frequency hopping mechanism for inter-cell interference cancellation in any of the embodiments described above, the base station needs to avoid instability of inter-cell interference cancellation information caused by interference fluctuation. Specifically, the base station transmits at least one CSI measurement configuration information to the user equipment, each CSI measurement configuration information being associated with its respective interference hypothesis. For example, assuming that there are three coordinated multi-point interference hypotheses, the base station may configure one corresponding CSI measurement configuration for each interference hypothesis accordingly.
And the user equipment performs CSI measurement on the CSI-RS resource based on the received CSI measurement configuration information and sends a CSI measurement report to the base station. For example, the user equipment receives three pieces of CSI measurement configuration information, and according to each piece of CSI measurement configuration information, the user equipment performs CSI measurement on a corresponding CSI-RS resource and sends, for example, three CSI measurement reports to the base station.
And the base station receives the CSI measurement report from the user equipment, and selects CSI corresponding to the current resource to schedule the user equipment based on the CSI measurement report from the user equipment.
Based on the technical scheme for avoiding interference fluctuation, interference hypothesis and CSI measurement configuration information are in one-to-one correspondence, and implementation at the base station end is simple and effective.
Fig. 10 shows a schematic diagram of avoiding inter-cell interference fluctuations according to an embodiment of the invention. The node in fig. 10 may be understood as a base station in the field of wireless communication, but is not limited to only a base station.
During the frequency hopping process, the downlink power may vary in the time domain. In order to ensure stable interference measurement of each cooperative node, each cooperative node may need to silence some resource blocks as needed. As shown in FIG. 10, if the node # 1 and the node # 2 cooperate to perform frequency hopping for resource allocation, the node # 1 and the node # 2 may configure a Zero-Power CSI-RS (ZP CSI-RS: Zero Power CSI-PS) and a Non-Zero-Power CSI-RS (NZP CSI-RS: Non Zero Power). UE # 1 may be configured to:
According to the above one-to-one corresponding CSI-IM and CSI measurement configuration, UE # 1 reports CSI # 1 and CSI # 2, where CSI # 1 corresponds to CSI measurement configuration # 1 and CSI # 2 corresponds to CSI measurement configuration # 2. CSI # 1 and CSI # 2 may be described as:
wherein S1Is the signal power, S, of node # 1 to UE # 12Is the signal power, I, of node # 2 to UE # 1outIs noise plus interference except for node # 1 and node # 2.
On the muted resources of node # 2, node # 1 may select CSI # 1 to schedule, precode, and select a modulation and coding scheme for UE # 1.
In order to save the resources for CSI reporting and the resources for CSI measurement, the invention provides a technical scheme which saves more resources and avoids interference fluctuation.
According to another embodiment of the present invention, while the network device adopts the frequency hopping mechanism for inter-cell interference cancellation in any of the embodiments described above, the base station needs to avoid instability of inter-cell interference cancellation information caused by interference fluctuation under the condition of saving resources. Specifically, the base station sends at least one piece of CSI measurement configuration information to the user equipment, and each piece of CSI measurement configuration information is associated with a specific interference hypothesis. For example, the base station may have three CSI measurement configuration information, which are all associated with one particular interference hypothesis. The specific interference assumes that a strong interferer of the interference measurement resource of the user equipment is in a silent state.
And the user equipment performs CSI measurement on the corresponding CSI-RS resource based on the received CSI measurement configuration information and sends a CSI measurement report to the base station. For example, the user equipment receives three pieces of CSI measurement configuration information, and according to each piece of CSI measurement configuration information, the user equipment performs CSI measurement on the CSI-RS resource and sends, for example, three CSI measurement reports to the base station.
And the base station receives the CSI measurement report from the user equipment, and reconstructs the CSI matched with the interference state of the current resource based on the CSI measurement report from the user equipment and the interference state of the current resource to schedule the user equipment.
Based on the technical scheme for avoiding interference fluctuation, the CSI reporting resource and the CSI-RS resource for CSI measurement are effectively saved corresponding to at least one piece of CSI measurement configuration information and a specific interference hypothesis.
Fig. 11 shows a schematic diagram of avoiding inter-cell interference fluctuations according to another embodiment of the invention.
In fig. 11, node # 1 and node # 2 cooperate to perform frequency hopping for resource allocation, and node # 1 and node # 2 may configure a Zero-Power CSI-RS (ZP CSI-RS: Zero Power CSI-PS). UE # 1 may be configured to:
According to the CSI-IM and CSI measurement configuration described above, UE # 1 reports CSI # 1, which CSI # 1 corresponds to CSI measurement configuration # 1. CSI # 1 may be described as:
wherein S1Is the signal power, I, of node # 1 to UE # 1outIs noise plus interference except for node # 1.
On the muted resource of node # 2, when CSI # 1 and the interference status of the current resource match, node # 1 may select CSI # 1 to schedule UE # 1, precode, and select a modulation and coding scheme. Otherwise, the node # 1 may reconstruct a CSI # 2 to schedule, precode, and select a modulation and coding scheme for the UE # 1. The reconstructed CSI # 2 should match the interference state in which the current resource is located. The CSI # 2 may be derived from CSI # 1, RSRP # 1 and RSRP # 2, where RSRP # 1 corresponds to node # 1 and UE # 1 and RSRP # 2 corresponds to node # 2 and UE # 1.
Fig. 12 shows a schematic diagram of a frequency hopping apparatus 1200 for inter-cell interference cancellation according to an embodiment of the invention. The frequency hopping apparatus 1200 described in fig. 12 in conjunction with fig. 3 through 9 described above may be located in a base station, a node, or a central controller. The frequency hopping apparatus 1200 includes a transmission unit 1201 for transmitting frequency hopping information including resource allocation information including at least one of power allocation information, scheduling allocation information, and beamforming allocation information to the second network device. The resource allocation signal may hop after a predetermined period of time. The frequency hopping information may further include frequency hopping configuration information including frequency hopping initial subframe information, initial resource allocation information associated with the frequency hopping initial subframe, and a frequency hopping parameter. The frequency hopping apparatus 1200 can further include a receiving unit 1202 (shown as a dashed box in fig. 12) for receiving second frequency hopping information from a second network device, the second frequency hopping information including second resource allocation information, the second resource allocation information including at least one of second power allocation information, second scheduling allocation information, and second beamforming allocation information. The second resource allocation information may hop after a predetermined period of time. The second hopping information may further include second hopping configuration information including second hopping initial subframe information, second resource allocation information associated with the second hopping initial subframe, and second hopping parameters. The resource allocation Information and the second resource allocation Information in the frequency hopping apparatus 1200 may be transmitted in a coordinated multi-point Information (CoMP Information) signaling (e.g., CoMP hypothesis signaling) based on, for example, an X2 interface, a Relative Narrowband transmit Power signaling (RNTP: Relative Narrowband TX Power), or an enhanced Relative Narrowband transmit Power signaling (eRNTP: enhanced RNTP). The resource allocation information may also be transmitted in any other suitable control signaling.
Fig. 13 shows a schematic diagram of an arrangement for avoiding interference fluctuations according to an embodiment of the invention. In conjunction with fig. 10 to 11, the base station or node may further include the apparatus 1300 shown in fig. 13 on the basis of the frequency hopping apparatus shown in fig. 12 to avoid interference fluctuation caused by frequency hopping. Apparatus 1300 includes a first transmission unit configured to transmit at least one channel state information measurement configuration information to a user equipment, each of the channel state information measurement configuration information being associated with its respective interference hypothesis; a first receiving unit, configured to receive at least one piece of channel state information from the ue, where each of the at least one piece of channel state information is measured based on corresponding channel state information measurement configuration information; and a first scheduling unit for selecting channel state information corresponding to a current resource to schedule the user equipment based on the at least one channel state information from the user equipment.
The at least one channel state information measurement configuration information in the apparatus 1300 is associated with a specific interference hypothesis that a strong interferer of the interference measurement resources of the user equipment is in a muted state.
Apparatus 1300 may further include a second scheduling unit configured to reconstruct channel state information matching the interference state of the current resource based on the at least one channel state information from the user equipment and the interference state of the current resource to schedule the user equipment.
In the present disclosure, the methods disclosed herein are described with reference to the figures. It should be understood, however, that the order of steps shown in the drawings and described in the specification is merely exemplary and that the method steps and/or actions may be performed in a different order and are not limited to the specific order shown in the drawings and described in the specification without departing from the scope of the claims.
The previous description of the disclosure is provided to enable any person skilled in the art to make or use the present invention. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the present invention is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (11)
1. A frequency hopping method in a first base station for inter-cell interference cancellation, comprising:
transmitting frequency hopping information to a second base station, wherein the frequency hopping information comprises resource allocation information, and the resource allocation information comprises at least one of power allocation information, scheduling allocation information and beam forming allocation information;
transmitting at least one channel state information measurement configuration information to a user equipment, each of the at least one channel state information measurement configuration information being associated with its respective interference hypothesis, the respective interference hypothesis corresponding to a silence state;
receiving at least one channel state information from the user equipment, each of the at least one channel state information being measured based on a corresponding channel state information measurement configuration information; and
selecting channel state information corresponding to a current resource to schedule the user equipment based on the at least one channel state information from the user equipment,
and the first base station can determine the resource allocation condition of the subsequent sub-frame according to the frequency hopping information.
2. The frequency hopping method of claim 1, wherein the resource allocation information hops after a predetermined period of time.
3. The frequency hopping method of claim 1, wherein the frequency hopping information further includes frequency hopping configuration information including frequency hopping initial subframe information, initial resource allocation information associated with the frequency hopping initial subframe, and frequency hopping parameters.
4. The method of any of claims 1-3, the resource allocation information is transmitted in coordinated multipoint information signaling, enhanced relative narrowband transmit power signaling, or relative narrowband transmit power signaling.
5. The method of claim 1, wherein the at least one channel state information measurement configuration information is associated with a particular interference hypothesis that a strong interferer of interference measurement resources of the user equipment is in the mute state.
6. The method of claim 5, further comprising reconstructing channel state information matching the interference state of a current resource based on the at least one channel state information from the user equipment and the interference state of the current resource to schedule the user equipment.
7. A frequency hopping apparatus for inter-cell interference cancellation in a first base station, comprising:
a transmission unit, configured to transmit frequency hopping information to the second base station, where the frequency hopping information includes resource allocation information, and the resource allocation information includes at least one of power allocation information, scheduling allocation information, and beamforming allocation information;
a first transmitting unit, configured to transmit at least one channel state information measurement configuration information to a user equipment, each of the at least one channel state information measurement configuration information being associated with its respective interference hypothesis, the respective interference hypothesis corresponding to a silence state;
a first receiving unit, configured to receive at least one piece of channel state information from the user equipment, where each of the at least one piece of channel state information is measured based on corresponding channel state information measurement configuration information; and
a first scheduling unit for selecting channel state information corresponding to a current resource to schedule the user equipment based on the at least one channel state information from the user equipment,
the frequency hopping device is located in the first base station, and the first base station can determine the resource allocation condition of the subsequent sub-frame according to the frequency hopping information.
8. The frequency hopping apparatus of claim 7, wherein the resource allocation information hops after a predetermined period of time.
9. The frequency hopping apparatus of claim 7, wherein the frequency hopping information further includes frequency hopping configuration information, the frequency hopping configuration information including frequency hopping initial subframe information, initial resource allocation information associated with the frequency hopping initial subframe, and frequency hopping parameters.
10. The apparatus of claim 7, wherein the at least one channel state information measurement configuration information is associated with a particular interference hypothesis that a strong interferer of interference measurement resources of the user equipment is in the mute state.
11. The apparatus of claim 10, further comprising a second scheduling unit configured to reconstruct channel state information matching the interference state of the current resource to schedule the user equipment based on the at least one channel state information from the user equipment and the interference state of the current resource.
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| CN102754457A (en) * | 2010-02-12 | 2012-10-24 | 捷讯研究有限公司 | Reference signal for a coordinated multi-point network implementation |
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| CN101686550A (en) * | 2008-09-27 | 2010-03-31 | 华为技术有限公司 | Inter-cell interference suppression method, system and base station and user terminal |
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