CN104254102A

CN104254102A - Measurement report reporting method, communication node and system

Info

Publication number: CN104254102A
Application number: CN201310261171.5A
Authority: CN
Inventors: 罗薇; 谢峰; 黄莹; 李儒岳
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2013-06-26
Filing date: 2013-06-26
Publication date: 2014-12-31
Also published as: WO2014206159A1

Abstract

The invention discloses a measurement report reporting method. The method comprises the step that a first communication node receives first signaling from a second communication node, and obtains the reporting time of a measurement report according to the first signaling, and sends the measurement report to the second communication node at the reporting time. The invention also discloses a measurement report reporting system and a communication node. With the measurement report reporting method, communication node and measurement report reporting system of the invention adopted, problems of vacant resource consumption, inaccurate measurement results and long judgment delay when measurement results are reported in the prior art can be solved.

Description

Method, communication node and system for reporting measurement report

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a method, a communication node, and a system for reporting a measurement report.

Background

The Long Term Evolution (Long Term Evolution, LTE for short) is an Evolution of the Third Generation mobile communication technology (3G for short), but it is not the Fourth Generation mobile communication technology (4G for short) that people commonly misunderstand, but a transition between the 3G and 4G technologies, which improves and enhances the 3G over-the-air access technology, and it adopts Orthogonal Frequency Division Multiplexing (OFDM for short) technology and Multiple Input Multiple Output (MIMO) technology, namely: multi-antenna technology is used as the only standard for wireless network evolution. Long term evolution Advanced (LTE-Advanced, abbreviated LTE-a) is a subsequent evolution of LTE technology. In order to meet various requirement indexes of 4G, several key technologies for LTE-a are proposed, including carrier aggregation, coordinated multipoint transmission and reception, relay transmission, multi-antenna enhancement, and the like.

As shown in fig. 1, in the new architecture, a plurality of small base stations (small cells) with lower maximum transmission power and smaller coverage area may be disposed in a geographic coverage area of a macro base station (macro cell), and in a coverage area of the macro base station, the small base stations with closer geographic locations may be regarded as a cluster (cluster for short), and the small base stations may be mainly classified into two categories: one type, known as pico, is located outdoors; the other type of base station is arranged indoors and is called a Home eNodeB (Home eNodeB, HeNB for short), if the number of small cells placed in a coverage area of one macro cell is small, for example, within four, the small cells are considered as a small cell sparse deployment scenario, interference between small cells in the scenario still exists but is not main interference, and the main interference is from the macro cell. If the number of small cells placed in the coverage area of one macro cell is large, for example, more than ten small cells, the coverage area is regarded as a small cell dense deployment scene, and the interference among the small cells in the scene is quite serious. At present, many interference coordination schemes are proposed, including power control, switching state conversion of small cells, dynamic subband selection, etc., and the decision of these schemes depends on the correct measurement result.

In the prior art, the event of downlink measurement includes common-frequency measurement of a serving cell and a neighboring cell and inter-frequency measurement of the neighboring cell, and the reporting modes of measurement reports include periodic reporting, event-triggered reporting and periodic event-triggered reporting. The uplink measurement belongs to the implementation behavior of the base station, and is not limited, but in a small cell dense deployment scenario, because there are many small cells around the UE, the UE still consumes a lot of power according to the measurement and reporting mechanism. Meanwhile, too many reported measurement results waste many air interface resources, so that the planned uplink measurement is considered to assist the downlink measurement, so as to reduce the times and time for the downlink measurement of the UE. Meanwhile, in some scenarios, small cells may be configured with the same Physical Cell Identity (PCI), and for the UE, it is impossible to distinguish different small cells and perform accurate measurement on different cells. In addition, in an uplink and downlink time division (TDD for short) mode, if the adjacent sector configurations are not synchronized, it is possible that the small cell1 is configured as an uplink in a certain subframe, and the small cell2 is configured as a downlink, that is, in addition to the interference of the UE in the adjacent sector to the small cell1, the interference of the adjacent small cell2 to the small cell1 also exists, and then due to the reason of downlink time domain interference coordination, the interference suffered by the small cell1 in different subframes is also different.

In addition, in a scene of dense deployment of small cells, a single small cell cannot make a decision only according to its own independent measurement result, including switching, power adjustment, and the like, and also needs to consider the measurement results of adjacent small cells, and at least needs to comprehensively consider the measurement results of other small cells in the same cluster to make a decision, so each cluster needs a centralized control processor (CCU), and this CCU may exist on a certain small cell, as shown in fig. 2, the small cell is called an anchor sector, i.e., an anchor cell, or an independent processing Unit, as shown in fig. 3, or on a Radio Network Controller (RNC) in 3G.

Therefore, in the heterogeneous network system, the CCU needs to make a decision according to the measurement result reported by each small cell. However, in a scenario such as time domain interference coordination, the uplink measurement result difference of each subframe may be large. In addition, if the small cells do not report the measurement results uniformly at the same time, the CCU can only count the measurement results reported by the small cells within a certain period of time to make a decision, and the following three disadvantages are present:

1) the CCU cannot process in real time and needs a large cache to store the measurement results for a period of time;

2) the timeliness is reduced, and after the measurement report of some small cells is reported, a certain period of time is needed to be waited for receiving a decision response, for example: assuming that the decision time of the RNC is T0, T10, T20.., a measurement report is reported by a small cell at T1, and the decision time is T10, then almost a complete decision period needs to be waited;

3) there are limitations to the reporting interval of two measurements, for example: in a decision period, a small cell reports a plurality of measurement results, and obviously, the last measurement result should be used as a decision reference, which causes two problems: firstly, the reported measurement result before the small cell has no significance; secondly, if the time of two measurement reports is very close (possible for event-triggered reporting), and the time of the two reports is very close to the decision time, an error may be caused, and the small cell does not know which measurement report the decision is made according to, thereby causing inaccurate decision.

Disclosure of Invention

In view of the above, the present invention provides a method, a communication node and a system for reporting a measurement report, which can solve the problems of time-slot resource consumption, inaccurate measurement result decision and large decision delay in reporting the existing measurement result.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the invention provides a method for reporting a measurement report, which comprises the following steps:

the first communication node receives a first signaling from a second communication node, obtains the reporting time of a measurement report according to the first signaling, and reports the measurement report to the second communication node at the reporting time.

Wherein the first communication node is: the macro cell or the small cell comprises: the system comprises a Pico base station Pico cell, a home base station Femto cell, a relay station and a radio remote head RRH;

the second communication node is: the system comprises a centralized control processor CCU, a small cell, a macro cell or an upper network element.

Wherein the first signaling comprises information of absolute time; correspondingly, the obtaining, by the first communication node, the reporting time of the measurement report according to the first signaling includes:

and the first communication node acquires the reporting time of the measurement report according to the absolute time and the calibration time.

Wherein the first signaling comprises: configuring a time period and a subframe offset value; correspondingly, the obtaining, by the first communication node, the reporting time of the measurement report according to the first signaling includes:

and the first communication node calculates to obtain absolute time according to the configuration time period and the subframe offset value, and obtains the reporting time of the measurement report according to the absolute time and the calibration time.

Wherein the first signaling comprises: configuring a time index value; correspondingly, the obtaining, by the first communication node, the reporting time of the measurement report according to the first signaling includes:

the first communication node searches a configuration time table according to the configuration time index value to obtain a configuration time period and a subframe offset value, calculates to obtain absolute time, and obtains the reporting time of a measurement report according to the absolute time and the calibration time;

wherein the configuration schedule is notified to the first communication node by the second communication node in a static or semi-static manner.

Preferably, the method further comprises:

and the first communication node determines the measurement time or the measurement reporting time or determines the measurement time and the measurement reporting time simultaneously according to the first signaling.

Preferably, the method further comprises:

the first communication node receives a second signaling and/or a third signaling from the second communication node, acquires the reporting time of a measurement report according to the first signaling and the second signaling, and reports the measurement report to the second communication node at the reporting time; and the first communication node acquires the time-frequency resource and the reference signal sequence of the UE to be detected in the adjacent cell according to the third signaling, and measures the signal quality of the UE to be detected in the adjacent sector.

Wherein the second signaling comprises a calibration time representing a time difference between the second communication node and the first communication node, and the calibration time is 0 if synchronization between the second communication node and the first communication node is completed.

Preferably, when the first communication node is a small cell and the second communication node is a CCU, the third signaling includes sequence information of a plurality of UE reference signals to be tested in all small cells except the first communication node in the same cluster and corresponding time-frequency resource information.

The method for determining the UE to be tested comprises the following steps:

and each small cell measures the signal quality of all the UE in the cell, and if the signal quality of the UE is found to be lower than a given threshold value through measurement, all the UE with the received signal quality lower than the given threshold value are the UE to be measured.

Preferably, the method for acquiring the reference signal sequence information of the UE to be detected and the corresponding time-frequency resource information comprises:

and the small cell sends the reference signal sequence information of the UE to be tested and the corresponding time-frequency resource information to the CCU in the measurement report, and the CCU sends the reference signal sequence information of the UE and the corresponding time-frequency resource information to all small cells except the terminal service cell in the cluster after receiving the reference signal sequence information and the corresponding time-frequency resource information.

The method for acquiring the reference signal sequence information of the UE to be detected and the corresponding time-frequency resource information comprises the following steps:

and each small cell transmits the reference signal sequence information of the UE to be tested and the corresponding time-frequency resource information to all adjacent small cells and macro cells through an X2 interface.

When the first communication node is a small cell and the second communication node is a CCU, the reporting, by the first communication node, of a measurement report to the second communication node includes:

the small cell only reports the information of the edge terminal, and the CCU allocates resources for the edge terminal through the collected information inside the cluster and allocates different time-frequency resources for the uplink signal of the edge terminal.

and the small cell reports the reference signal configuration information of the cell in the next period/moment at the moment given by the CCU, and the small cell/the CCU executes monitoring/measuring operation after collecting the reference signal configuration information of the adjacent cell.

Preferably, when the first communication node is a small cell and the second communication node is a CCU, the reporting, by the first communication node, a measurement report to the second communication node includes:

and the small cell/CCU reports the ABS use information of the cell at the given moment of the CCU, and the ABS subframe is reconfigured after the small cell/CCU collects the ABS use information of the adjacent cell.

Preferably, the method further comprises:

the first communication node measures the uplink signal receiving quality of all UE in the cell and the uplink signal receiving quality of UE to be measured in all communication nodes except the first communication node in the cell in a measuring period, and sends the measuring result of the UE meeting the measuring and reporting condition to the second communication node.

Wherein, the UE for measuring the reporting condition includes: the UE with the uplink signal receiving quality smaller than a given threshold value in the cell or the UE with the uplink signal receiving quality larger than the given threshold value in the UE to be tested in the cell but not in the cell in the system.

The present invention also provides a communication node, comprising: the device comprises a receiving module, an acquisition module and a reporting module; wherein,

the receiving module is configured to receive a first signaling from another communication node;

the acquisition module is used for acquiring the reporting time of the measurement report according to the first signaling received by the receiving module;

and the reporting module is configured to report the measurement report to the other communication node at the reporting time acquired by the acquiring module.

Preferably, the obtaining module is further configured to determine a measurement time, or determine a measurement reporting time, or determine both the measurement time and the measurement reporting time according to the first signaling.

Preferably, the receiving module is further configured to receive a second signaling and/or a third signaling from the other communication node;

the obtaining module is further configured to obtain reporting time of a measurement report according to the first signaling and the second signaling, obtain a time-frequency resource and a reference signal sequence of a UE to be measured in an adjacent cell according to the third signaling, and measure signal quality of the UE to be measured in an adjacent sector;

the reporting module is further configured to report a measurement report to the another communication node at the reporting time obtained according to the first signaling and the second signaling.

The communication node further comprises a measuring module, configured to measure, in a measurement period, uplink signal reception quality of all UEs in the cell and uplink signal reception quality of UEs to be measured in all communication nodes except the first communication node in the cell; accordingly, the method can be used for solving the problems that,

the reporting module is further configured to send the measurement result of the UE meeting the measurement reporting condition to the other communication node.

The present invention also provides a communication node, comprising: a transmitting module and a receiving module; wherein,

the sending module is used for sending a first signaling to another communication node;

the receiving module is configured to receive the measurement report that is reported by the other communication node at the reporting time of the measurement report that is obtained according to the first signaling.

Preferably, the sending module is further configured to send a second signaling and/or a third signaling to the other communication node;

the receiving module is further configured to receive a measurement report that is reported by the other communication node at a reporting time of the measurement report that is obtained according to the first signaling and the second signaling.

Preferably, the receiving module is further configured to receive uplink signal reception qualities of all UEs that meet the measurement reporting condition and are measured in the measurement period and are sent by the another communication node, and uplink signal reception qualities of UEs to be measured in all communication nodes except the first communication node in the cell.

The invention also provides a system for reporting the measurement report, which comprises: two communication nodes as described above.

According to the method, the communication node and the system for reporting the measurement report, the first communication node receives the first signaling from the second communication node, the first communication node acquires the reporting time of the measurement report according to the first signaling, and reports the measurement report to the second communication node at the reporting time. By applying the invention, on one hand, the problems of larger power consumption caused by excessive measurement of the UE and excessive air interface resource consumption caused by excessive reporting of the measurement result of the UE in the related technology are solved; on the other hand, the problems that the CCU is inaccurate in judgment according to the measurement result, the judgment delay is large and the CCU has large cache requirements are solved by a mode of reporting the measurement report at regular time. Therefore, the power consumption of the UE is saved, and the system efficiency is improved.

Drawings

Fig. 1 is a schematic diagram of a new network architecture of an existing heterogeneous network system in LTE;

FIG. 2 is a schematic diagram of an embodiment of a CCU distribution;

FIG. 3 is a schematic diagram of another embodiment of a CCU distribution scenario;

fig. 4 is a schematic structural diagram of information interaction performed by a communication node through an X2 interface in the embodiment of the present invention;

fig. 5 is a schematic structural diagram of a communication node according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a communication node according to another embodiment of the present invention;

fig. 7 is a flowchart illustrating a communication node reporting a measurement result at regular time according to a signaling according to an embodiment of the present invention;

fig. 8 is a flowchart illustrating a communication node according to another embodiment of the present invention reporting a measurement result at regular time according to a signaling;

fig. 9 is a schematic diagram of a connection method between the small cell and the macro cell in the sixth embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the figures and the embodiments.

the first communication node searches a configuration time table according to the configuration time index value to obtain a configuration time period and a subframe offset value, so that absolute time is obtained through calculation, and reporting time of a measurement report is obtained according to the absolute time and calibration time;

Further, the method further comprises:

Preferably, the method further comprises:

When the first communication node is a small cell and the second communication node is a CCU, the third signaling comprises UEs to be tested in all small cells except the first communication node in the same cluster, namely reference signal sequence information of a plurality of UEs to be tested and corresponding time-frequency resource information.

The method for determining the UE to be tested comprises the following steps:

and each small cell transmits the reference signal sequence information of the UEs to be tested and the corresponding time-frequency resource information to all adjacent small cells and macro cells through an X2 interface, as shown in fig. 4.

Further, the method further comprises:

The present invention also provides a communication node, as shown in fig. 5, the communication node includes: the device comprises a receiving module, an acquisition module and a reporting module; wherein,

Further, the obtaining module is further configured to determine a measurement time, or determine a measurement reporting time, or determine both the measurement time and the measurement reporting time according to the first signaling.

Preferably, the communication node further includes a measurement module, configured to measure, in a measurement period, uplink signal reception quality of all UEs in the cell and uplink signal reception quality of UEs to be measured in all communication nodes except the first communication node in the cell; accordingly, the method can be used for solving the problems that,

The present invention also provides a communication node, as shown in fig. 6, the communication node includes: a transmitting module and a receiving module; wherein,

The invention also provides a system for reporting the measurement report, which comprises the two communication nodes.

The method of the present invention is described in detail below with reference to fig. 7 and the specific embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The embodiment of the invention provides a method for reporting a measurement result of a small cell at regular time, wherein the flow of the method can be shown in fig. 7, and the method comprises the following steps of S702 to S710:

step S702, the small cell receives a first signaling from the CCU;

step S704, the small cell measures the receiving quality of all UE uplink signals in the cell;

step S706, the small cell obtains the reporting time of the measurement report according to the first signaling;

step 708, the small cell generates a measurement report according to the measurement result;

and step S710, the small cell reports the measurement report to the CCU at the reporting time.

In the first signaling, various information may be carried, and may be an absolute time parameter, for example, T1, the time T of reporting the measurement report, which is calculated by the small cell according to the absolute time T1 and the calibration time T0, is T0+ T1; or, the first signaling includes a configuration time period P1 and a subframe offset parameter Sub _ offset, so as to determine the system radio frame number SFN and subframe number subframe at the measurement reporting time, where the SFN and subframe need to satisfy the following conditions:

SFN mod T＝FLOOR(Suboffset/10)；

subframe＝Suboffset mod10；

wherein: t is P1/10;

or, the first signaling includes an index value of a configuration time table, the small cell obtains the configuration time period P1 and the subframe offset value Sub _ offset according to a table lookup of the configuration time table index value, so as to calculate the absolute time of the SFN and the subframe, and obtains the time for reporting the measurement report according to the calculated absolute time and the calibration time. And the CCU informs all small cells in the cluster of the configuration time table in a static or semi-static mode.

In step S708, the measurement report includes at least one of:

the UE may further include uplink signal received quality (RSRQ) of the UE, uplink signal received power (RSRP) of the UE, ABS configuration information (ABS Pattern Info), ABS usage information (Usable ABS Pattern Info, DL ABS Status), Radio Resource usage (Radio Resource Status), Load indication information (Load Indicator), and the like.

By applying the method of the embodiment, on one hand, the problems of large power consumption caused by excessive measurement of the UE and excessive air interface resource consumption caused by excessive reporting of the measurement result by the UE in the related technology are solved; on the other hand, the problems that the CCU is inaccurate in judgment according to the measurement result, the judgment delay is large and the CCU has large cache demand are solved by a mode of reporting the measurement report at regular time, so that the power consumption of the UE is saved, and the system efficiency is improved.

Preferably, in the embodiment of the present invention, the small cell may receive the second signaling and the third signaling in addition to the first signaling, and a flow of the method for reporting the measurement result at regular time is shown in fig. 8, where the method includes steps S802 to S814:

step S802, the small cell receives a first signaling, a second signaling and a third signaling from the CCU;

step S804, the small cell measures the receiving quality of all UE uplink signals in the cell;

step S806, the small cell compares all UE signal quality obtained through measurement with a given threshold value, and the UEs to be measured of the small cell are determined;

step S808, the small cell acquires the time-frequency resource and the reference signal sequence of the UE to be detected in the adjacent sector according to the third signaling, and measures the signal quality of the UE to be detected in the adjacent sector;

step S810, the small cell obtains the reporting time of the measurement report according to the first signaling and the second signaling;

step S812, the small cell generates a measurement report according to the measurement result;

and step S814, the small cell reports the measurement report to the CCU at the reporting time.

By applying the method of the embodiment, on one hand, the problems of large power consumption caused by excessive measurement of the UE and excessive air interface resource consumption caused by excessive reporting of the measurement result by the UE in the related technology are solved; on the other hand, the problems of inaccurate judgment, larger time delay and larger cache requirement of the CCU according to the measurement result are solved by a mode of reporting the measurement report at regular time, so that the system efficiency is improved, and the power consumption of the UE is saved.

In the second signaling, a calibration time T0 is included, which represents a time difference between the CCU and the small cell, and if synchronization has been achieved between the CCU and each small cell, the calibration time is 0, that is, the CCU may not transmit the first signaling, and if the small cell does not receive the first signaling, the default calibration time is 0.

In the third signaling, the UEs to be tested in other small cells under the same cluster are used for determining information of a reference signal (sounding and/or DMRS) sequence and corresponding time-frequency resource information;

the determination methods of the reference signal (sounding and/or DMRS) sequence information of the UEs to be tested and the corresponding time-frequency resource information include a variety of methods, for example: in step S804, each small cell measures the signal quality of all UEs in the cell, and if the signal quality of a certain UE is found to be lower than a given threshold value by measurement, the reference signal sequence information of the UE and the corresponding time-frequency resource information are sent to the CCU in a measurement report, and the CCU sends the reference signal sequence information of the UE and the corresponding time-frequency resource information to all small cells under the cluster after receiving the reference signal sequence information of the UE and the corresponding time-frequency resource information;

the reference signal comprises at least one of: demodulation Reference Signal (DMRS), Sounding Reference Signal (SRS), and preamble sequence (preamble).

Or, in step S804, each small cell measures the signal quality of all UEs in the cell, and if the quality of a UE signal is found to be lower than a given threshold value, the reference signal sequence information of the UE and the corresponding time-frequency resource information are transmitted to all adjacent small cells and macro cells through an X2 interface.

In step S812, the measurement report content includes, but is not limited to, the following information:

UE sets with the uplink signal receiving quality smaller than a given threshold value in the cell;

information for determining a reference signal (sounding and/or DMRS) sequence of the UE and corresponding time-frequency resource information;

UE sets with uplink signal receiving quality larger than a given threshold value in UEs to be tested in other cells; or,

received signal quality information for the set of UEs.

The method of the preferred embodiment is further described with reference to the accompanying drawings and specific examples.

Example one

The embodiment of the invention provides a method for reporting a measurement result of a small cell at regular time, and supposing that a cluster exists in the coverage area of a macro cell, a CCU and N small cells exist in the cluster, taking a small cell1 as an example, the flow of the method comprises the following steps:

step one, a small cell1 measures the uplink signal receiving quality (RSRP/RSRQ) of all UE in a cell;

step two, the small cell1 compares all the measured UE signal quality with a given threshold, the UE smaller than the threshold is the UE 1 to be tested of the small cell1, and the UE 1 is assumed to be { UE id1, UE id2 };

step three, the small cell1 sends the information of the UEs1 to be tested used for determining the reference signal (sounding and/or DMRS) sequence and the corresponding time frequency resource information to the CCU;

step four, the small cell1 receives information used for determining a reference signal (sounding and/or DMRS) sequence and corresponding time-frequency resource information from all other UEs to be tested in other small cells under the same cluster of the CCU, wherein the UEs are { UEs2, UEs3 and UEs N };

step five, the small cell acquires the time-frequency resources and the reference signal sequences of the UEs to be tested in the adjacent sectors according to the step four, and measures the signal quality of all the UEs to be tested in the adjacent sectors;

step six, the small cell1 receives the calibration time T0 and the absolute time signaling T1 from the CCU;

step seven, the small cell1 obtains the reporting time T of the measurement report according to the calibration time T0 and the absolute time signaling T1: T-T0 + T1;

step eight, the small cell1 generates a measurement report according to the measurement result of the UEs1 to be measured in the sector and the measurement results of the UEs to be measured in all other small cells in the cluster 1.

And step nine, the small cell1 reports the measurement report generated in the step eight to the CCU at the reporting time T.

Example two

The difference between this embodiment and the first embodiment is that step six and step seven:

step six: the small cell1 receives the absolute time signaling T1 from the CCU;

step seven: the small cell1 obtains the reporting time T of the measurement report according to the absolute time signaling T1: t ═ T1;

in the embodiment, the small cell and the CCU under the same cluster realize synchronization.

EXAMPLE III

step six, the small cell1 receives a configuration time period P1 and a subframe offset parameter Suboffset from the CCU;

step seven, the small cell1 determines the reporting time of the measurement report, including the system radio frame number SFN and the subframe number subframe, where the SFN and subframe need to satisfy the following conditions:

SFN mod T＝FLOOR(Suboffset/10)；

subframe＝Suboffset mod 10；

wherein: t is P1/10;

example four

The difference between this embodiment and the third embodiment is in step six:

step six, the small cell1 receives an index value of a configuration time table from the CCU, and the small cell looks up the table according to the index value of the configuration time table to obtain a configuration time period P1 and a subframe offset value Suboffset;

and the CCU informs all small cells in the cluster of the configuration schedule in a static or semi-static mode.

EXAMPLE five

The difference between this embodiment and the first embodiment is that step three and step four:

step three, the small cell1 sends the information of the UE 1 to be tested for determining the reference signal (sounding and/or DMRS) sequence and the corresponding time frequency resource information to the adjacent small cell through an X2 interface;

step four, the small cell1 receives sequence information and corresponding time-frequency resource information which are used for determining reference signals (sounding and/or DMRS) of all the UEs to be tested in other small cells under the same cluster through an X2 interface, wherein the UEs are { UEs2, UEs3 and UEsN };

EXAMPLE six

The embodiment of the invention provides a method for reporting a measurement result by a small cell at regular time, and supposing that one cluster exists in the coverage range of a macro cell, N small cells exist in the cluster1, taking a small cell1 as an example, the flow of the method comprises the following steps:

receiving sequence information and corresponding time-frequency resource information of UEs to be tested in all other small cells in the same cluster by the small cell1 through an X2 interface, wherein the UEs are { UEs2, UEs3 and UEs };

step six, the small cell1 receives the calibration time T0 and the absolute time signaling T1 from the macro cell;

step seven: the method comprises the following steps that a small cell1 determines the reporting time of a measurement report, wherein the reporting time comprises a system radio frame number SFN and a subframe number subframe, and the SFN and the subframe need to meet the following conditions:

SFN mod T＝FLOOR(Suboffset/10)；

subframe＝Suboffset mod10；

wherein: t is P1/10;

and step nine, the small cell1 sends the measurement report generated in the step eight to the adjacent small cell through the X2 interface at the reporting time SFN and the subframe.

In this embodiment, there is no special CCU processing unit, each small cell makes a decision according to its own measurement result and the measurement result of the neighboring cell received through the X2 interface, the criterion of the decision is agreed in advance by a protocol, parameters such as a threshold value and the like can be issued by an upper entity unit such as a macro cell or an MME, and the connection mode between the small cell and the macro cell is shown in fig. 9.

EXAMPLE seven

The present embodiment is an extension of the content of the present invention, and the above six embodiments are all applied to a heterogeneous network communication system, that is: the present embodiment illustrates that the present invention can also be applied to an isomorphic network communication system, that is, in a system where a macro base station and a small base station exist simultaneously, that is: in systems where only macro base stations or only small base stations are present.

If only small base station small cells exist in a certain geographic area and macro cells do not exist, if a CCU exists, the implementation steps are the same as those in the embodiment, and if no CCU exists, the implementation steps are similar to the sixth embodiment, and the only difference is that in the sixth embodiment: the small cell1 receives the calibration time T0 from the MME as well as the configuration time period P1 and the subframe offset value Suboffset; or the protocol appoints to configure the time period P1 and the subframe offset value subframe without the upper layer entity unit for notification.

Example eight

If only macro base station macro cell exists in a certain geographic area, no small base station exists, and it is assumed that N macro base stations are connected through an X2 interface in the area, the flow of the method includes the following steps:

step one, macro cell1 measures the uplink signal receiving quality (UL-RSRP/RSRQ) of all UE in the cell;

step two, comparing the measured signal quality of all the UEs with a given threshold by the macro cell1, wherein the UE smaller than the threshold is the UE 1 to be measured of the macro cell1, and assuming that the UEs1 are { UE id1, UE id2 };

thirdly, the macro cell1 sends the information of the UEs1 to be tested for determining the sequence of the reference signal (sounding and/or DMRSand/or PRACH signal) and the corresponding time-frequency resource information to the adjacent macro cells through an X2 interface;

step four, receiving information used for determining a reference signal (sounding and/or DMRS) sequence and corresponding time-frequency resource information by UEs to be tested in other macro cells through an X2 interface by macro cell1, where the UEs { (UEs 2, UEs3, and UEs };

step five, the macro cell1 obtains time-frequency resources and reference signal sequences of the UEs to be tested in the adjacent sectors according to the step four, and measures the signal quality and/or signal intensity of all the UEs to be tested in the adjacent sectors;

sixthly, the macro cell1 receives the calibration time T0 from the MME or the RNC, the configuration time period P1 and the subframe offset value Suboffset; or, determining the configuration time period P1 and the subframe offset value Suboffset according to the protocol convention in advance;

seventhly, the macro cell1 acquires the reporting time T of the measurement report according to the calibration time T0, the configuration time period P1 and the subframe offset value Suboffset;

step eight, generating a measurement report by the macro cell1 according to the measurement result of the UEs1 to be measured in the sector and the measurement results of the UEs to be measured in other adjacent macro cells;

and step nine, the macro cell1 sends the measurement report generated in the step eight to the adjacent macro cell through the X2 interface at the reporting time T.

Example nine

In TDD, it is possible that small cell1 is configured as an uplink in a certain subframe, and small cell2 is configured as a downlink, that is, there is interference to the small cell by the small cell in addition to interference to the small cell by the UE, and then due to a reason of downlink time domain interference coordination, interference to the small cell in different subframes is also different, so that measurement is performed in different subframes, and measurement results may be very different, in this embodiment, the purpose of accurate measurement is achieved by a method of limiting measurement time, and the specific flow is as follows:

step one, a small cell1 receives a measurement time signaling from a CCU, determines measurement time, and measures uplink signal received quality (RSRP/RSRQ) of all UE in a cell at the measurement time by the small cell 1;

wherein the measurement time signaling comprises: the time period P1 and one subframe offset parameter Suboffset1 are configured, and then the system frame number SFN and subframe number subframe at the measurement moment need to satisfy the following conditions:

SFN mod T＝FLOOR(Suboffset1/10)；

subframe＝Suboffset1 mod 10；

wherein: t is P1/10;

step four, the small cell1 receives sequence information and corresponding time-frequency resource information which are used for determining reference signals (sounding and/or DMRS) of all the UEs to be tested in other small cells under the same cluster from the CCU, wherein the UEs are { UEs2, UEs3 and UEs N };

step five, the small cell1 acquires time-frequency resources and reference signal sequences of UEs to be tested in adjacent sectors according to the step four, and measures the signal quality of all UEs to be tested in the adjacent sectors at the measurement time determined in the step one;

step six, the small cell1 receives a configuration time period P2 and a subframe offset parameter Suboffset2 from the CCU;

SFN mod T＝FLOOR(Suboffset2/10)；

subframe＝Suboffset2 mod 10；

wherein: t is P2/10;

step eight, the small cell1 generates a measurement report according to the measurement result of the UEs1 to be tested in the sector and the measurement results of the UEs to be tested in all other small cells in the cluster 1;

and step nine, the small cell1 reports the measurement report generated in the step eight to the CCU at the reporting time SFN and subframe.

It should be noted that the implementation method of the present embodiment is preferably applied to a TDD system, but is not limited to the TDD system.

Example ten

In a ninth embodiment, a CCU or other upper level entity unit is required, including: macro, MME or RNC transmits a measurement time signaling and a measurement report reporting time signaling respectively, but this embodiment simplifies a signaling of the ninth embodiment, and only a small cell needs to receive a measurement time signaling, which is different from the ninth embodiment in the sixth step:

step six, the small cell1 determines the reporting time of the measurement report according to the measurement time signaling received from the CCU in the step one; wherein the measurement time signaling: the method comprises the following steps: one configuration time period P1 and one subframe offset parameter Suboffset 1; the measurement report reporting time includes: one configuration time period P2 and one subframe offset parameter Suboffset 2; specifically, the method comprises the following steps: p2 ═ K × P1+ a; suboffset2 ═ Suboffset1+ b;

wherein k is any natural number greater than 0, a is any natural number greater than or equal to 0, b is any natural number greater than-NumOFsubframe and less than NumOFsubframe, NumOFsubframe is the number of system subframes, and can be notified through high-level signaling or agreed by protocols of both parties;

preferably, K ═ 1, a ═ 0, b ═ 1;

EXAMPLE eleven

And in the tenth embodiment, a signaling of the ninth embodiment is simplified, and the small cell only needs to receive a measurement time signaling, and then calculates the time for reporting the measurement report according to the relationship between the measurement time and the time for reporting the measurement report. In this embodiment, the small cell only needs to receive one measurement report reporting signaling, and then calculates the measurement time according to the relationship between the measurement time and the time for reporting the measurement report. The difference in the flow from the example ten lies in: changing the step six into the step one, specifically:

step one, a small cell1 receives a configuration time period P2 and a subframe offset parameter Suboffset2 from a CCU;

step two, the small cell1 determines the measurement time according to the measurement report reporting time signaling received from the CCU in the step one; wherein, the reporting time signaling of the measurement report includes: one configuration time period P2 and one subframe offset parameter Suboffset 2; the measuring time comprises the following steps: one configuration time period P1 and one subframe offset parameter Suboffset 1; specifically, the method comprises the following steps: p1 ═ (P2-a)/K; suboffset1 ═ Suboffset 2-b; wherein k is any natural number greater than 0, a is any natural number greater than or equal to 0, b is any natural number greater than-NumOFsubframe and less than NumOFsubframe, NumOFsubframe is the number of system subframes, and can be notified through high-level signaling or agreed by protocols of both parties;

preferably, K ═ 1, a ═ 0, b ═ 1; other steps are the same as those in the embodiment, and are not described herein again.

Example twelve

One measurement reporting time is configured, the measurement reporting time can correspond to a plurality of measurement times, and the small cell can feed back one or more measurement results of the measurement times. The difference between this embodiment and the eleventh embodiment is that the step two:

step two: the small cell1 determines a plurality of measurement time signalings according to the measurement report reporting time signalings received from the CCU in the step one,

wherein, K, a and b respectively correspond to a group of parameters;

EXAMPLE thirteen

The embodiment of the invention provides a method for reporting measurement results of small cells at regular time, and supposing that a cluster1 exists in the coverage area of a macro cell, a CCU exists in the cluster1, N small cells are provided, and a small cell1 is taken as an example, the flow of the method comprises the following steps:

step one, a small cell1 receives a configuration time period P1 and a subframe offset parameter Suboffset from a CCU;

step two, the small cell1 measures the uplink signal receiving quality (RSRP/RSRQ) of all UE in the cell;

step three, the small cell1 determines the reporting time of the measurement report, wherein the reporting time comprises a system radio frame number SFN and a subframe number subframe, and the SFN and the subframe need to meet the following conditions:

SFN mod T＝FLOOR(Suboffset/10)；

subframe＝Suboffset mod 10；

wherein: t is P1/10;

step four, the small cell1 generates a measurement report according to the measured RSRP/RSRQ of the UE by the sector;

step five, the small cell1 reports a measurement report to the CCU at the reporting time;

and step six, the CCU judges the RSRP/RSRQ of the UE reported by the N small cells, selects the most appropriate transmission node for each UE, determines whether the UE to be tested needs to execute the switching operation, and judges the target cell.

Example fourteen

The present embodiment is different from embodiment thirteen in that:

step two, the small cell1 counts the Usable ABS Pattern Info and DL ABS status information of the cell according to the obtained ABS Pattern Info information of the adjacent cell;

wherein the adjacent cell comprises at least one of a macro cell and a small cell;

step four, the small cell1 generates a statistical report by the information of the Usable ABS Pattern Info and the DLABS status obtained by statistics in the step two.

And step six, after receiving the information of the Usable ABS Pattern Info and the DL ABS status reported by the N small cells, the CCU makes a judgment and determines whether the ABS Pattern Info of the macro cell needs to be reconfigured.

Example fifteen

The present embodiment is different from embodiment thirteen in that:

step two, the small cell1 counts the PRB service condition in each service in the cell, and generates a radio resource Status information unit and/or a Load Indicator information unit;

step four, the small cell1 generates a statistical report by using the Radio Resource Status and Load Indicator information unit obtained by statistics in the step two;

and step six, after receiving the Radio Resource Status and Load Indicator information reported by the N small cells, the CCU determines the opening or closing of each small cell by combining with other interference indication information.

Example sixteen

The present embodiment is applied to a TDD scenario, and is different from the thirteenth embodiment in that:

step two, the small cell1 counts the uplink and downlink resource utilization conditions (radio resource Status) in the cell;

step four, the small cell1 generates a statistical report by the Radio Resource Status information unit obtained by the statistics in the step two;

and step six, after receiving the Radio Resource Status information reported by the N small cells, the CCU determines the uplink and downlink subframe configuration of each small cell.

Example seventeen

In this embodiment, the small cell only reports the measurement report for the edge terminal, and the CCU allocates resources to the terminals through the collected conditions inside the cluster, so that the advantage of this is that the centralized control function of the CCU is fully exerted, and collision of uplink signals sent by the terminals is avoided.

Specifically, the present embodiment is different from embodiment thirteen in that:

step four, the small cell1 determines edge UE according to the RSRP/RSRQ of the UE obtained by measurement in the local sector, and generates a measurement report according to the information of the UE to be measured;

and step six, after receiving the information of the edge UE reported by each small cell, the CCU reallocates the resource of the uplink signal for the edge UE and avoids the collision of the uplink signals of the edge terminals.

The edge UE is UE with RSRP/RSRQ lower than a set threshold value.

EXAMPLE eighteen

In this embodiment, after receiving the information reported by each small cell, the CCU reports the information to the macro cell at regular time, and the macro cell makes a decision according to all the received reported information.

In this embodiment, the execution steps of the Small cell are similar to those in the thirteenth embodiment, and specifically, the method includes the following steps:

step two, the small cell1 measures the uplink signal receiving quality (RSRP/RSRQ) of all the UE in the cell;

SFN mod T＝FLOOR(Suboffset/10)；

subframe＝Suboffset mod 10；

wherein: t is P1/10;

step four, the small cell1 generates a measurement report according to the measured signal receiving quality of the UE by the sector.

in addition, the present embodiment further includes a execution step of the CCU, specifically, including steps six to eight:

step six, the CCU receives the measurement reports reported by the N small cells in the cluster to which the CCU belongs, and generates a new measurement report through judgment;

step seven, the CCU determines the time for reporting the measurement report;

step eight, reporting a measurement report to a macro cell by the CCU at the reporting time;

the macro cell makes a decision according to the received measurement report, including: switching, ABS subframe configuration, power control, small cell switch and the like.

In step seven, the CCU may determine the time for reporting the measurement report by itself, or may determine the time for reporting the measurement according to the time signaling delivered by the macro cell.

From the above description, it can be seen that the present invention achieves the following technical effects:

by applying the embodiment of the invention, on one hand, the problems of larger power consumption caused by excessive measurement of the UE and excessive air interface resource consumption caused by excessive reporting of the measurement result of the UE in the related technology are solved; on the other hand, the problems that the CCU is inaccurate in judgment according to the measurement result, the judgment delay is large and the CCU has large cache demand are solved by a mode of reporting the measurement report at regular time, so that the power consumption of the UE can be saved, and the system efficiency is improved.

Example nineteen

In this embodiment, the base station needs to monitor interference/load of other base stations according to the reference signal, and therefore needs to know the configuration of the reference signal of other base stations, so that the base station uploads the configuration of the reference signal to the CCU/macro cell/small cell at a given time, so that other base stations can perform monitoring measurement at a correct time-frequency position.

Step one, a small cell receives a configuration time period P1 and a subframe offset parameter Suboffset from a CCU;

step two, the small cell sends the reference signal configuration of the next period to the CCU/macro cell/small cell in a given time;

and step three, the small cell receives the configuration information of the next period from other cells and monitors/measures the interference situation on the reference signal at the next moment.

by applying the embodiment of the invention, the problems of inaccurate measurement judgment and larger judgment delay of the small cell are solved by reporting the configuration of the reference signal at regular time, so that the system efficiency can be improved.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented using a general purpose computing device, which may be centralized on a single computing device or distributed across a network of computing devices. Alternatively, they may be implemented in program code executable by a computing device such that they may be stored in a memory device for execution by the computing device, and in some cases the steps shown or described may be performed in an order different than presented herein, or they may be separately fabricated into separate integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

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

1. A method for reporting a measurement report is characterized in that the method comprises the following steps:

2. The method of claim 1, wherein the first communication node is: the macro cell or the small cell comprises: the system comprises a Pico base station Pico cell, a home base station Femtocell, a relay station and a radio remote head RRH;

3. The method according to claim 1 or 2, characterized in that the first signaling comprises information of absolute time; correspondingly, the obtaining, by the first communication node, the reporting time of the measurement report according to the first signaling includes:

4. The method according to claim 1 or 2, wherein the first signaling comprises: configuring a time period and a subframe offset value; correspondingly, the obtaining, by the first communication node, the reporting time of the measurement report according to the first signaling includes:

5. The method according to claim 1 or 2, wherein the first signaling comprises: configuring a time index value; correspondingly, the obtaining, by the first communication node, the reporting time of the measurement report according to the first signaling includes:

6. The method according to claim 1 or 2, characterized in that the method further comprises:

7. The method according to claim 1 or 2, characterized in that the method further comprises:

8. The method of claim 7, wherein the second signaling comprises a calibration time representing a time difference between the second communication node and the first communication node, and wherein the calibration time is 0 if synchronization between the second communication node and the first communication node is completed.

9. The method of claim 7, wherein when the first communication node is a small cell and the second communication node is a CCU, the third signaling includes reference signal sequence information of multiple UEs to be tested in all small cells except the first communication node in the same cluster, and corresponding time-frequency resource information.

10. The method of claim 9, wherein the UE to be tested is determined by:

11. The method of claim 9, wherein the method for acquiring the UE reference signal sequence information to be tested and the corresponding time-frequency resource information comprises:

12. The method of claim 9, wherein the method for acquiring the UE reference signal sequence information to be tested and the corresponding time-frequency resource information comprises:

13. The method according to claim 1 or 2, wherein when the first communication node is a small cell and the second communication node is a CCU, the reporting, by the first communication node, a measurement report to the second communication node comprises:

14. The method according to claim 1 or 2, wherein when the first communication node is a small cell and the second communication node is a CCU, the reporting, by the first communication node, a measurement report to the second communication node comprises:

15. The method of claim 2, wherein when the first communication node is a smallcell and the second communication node is a CCU, the reporting, by the first communication node, a measurement report to the second communication node comprises:

16. The method according to claim 1 or 2, characterized in that the method further comprises:

17. The method of claim 16, wherein the UE measuring the reporting condition comprises: the UE with the uplink signal receiving quality smaller than a given threshold value in the cell or the UE with the uplink signal receiving quality larger than the given threshold value in the UE to be tested in the cell but not in the cell in the system.

18. A communication node, characterized in that the communication node comprises: the device comprises a receiving module, an acquisition module and a reporting module; wherein,

19. The communications node of claim 18, wherein the obtaining module is further configured to determine a measurement time, a measurement reporting time, or both according to the first signaling.

20. The communication node according to claim 18 or 19,

the receiving module is further configured to receive a second signaling and/or a third signaling from the other communication node;

21. The communications node according to claim 18 or 19, wherein the communications node further comprises a measuring module, configured to measure, in a measurement period, uplink signal reception quality of all UEs in the cell and uplink signal reception quality of UEs to be measured in all communications nodes except the first communications node in the cell; accordingly, the method can be used for solving the problems that,

22. A communication node, characterized in that the communication node comprises: a transmitting module and a receiving module; wherein,

23. The communication node of claim 22,

the sending module is further configured to send a second signaling and/or a third signaling to the other communication node;

24. The communication node according to claim 22 or 23,

the receiving module is further configured to receive uplink signal reception quality of all UEs that meet the measurement reporting condition and are measured in the measurement period and sent by the other communication node, and uplink signal reception quality of UEs to be measured in all communication nodes except the first communication node in the cell.

25. A system for reporting a measurement report, the system comprising: the communication node of any of claims 18 to 21 and the communication node of any of claims 22 to 24.