CN109075932A

CN109075932A - Reference signal configuration method, central location and distribution unit

Info

Publication number: CN109075932A
Application number: CN201680085541.6A
Authority: CN
Inventors: 侯云; 招溢利
Original assignee: Huizhou TCL Mobile Communication Co Ltd
Current assignee: Huizhou TCL Mobile Communication Co Ltd
Priority date: 2016-08-31
Filing date: 2016-08-31
Publication date: 2018-12-21
Anticipated expiration: 2036-08-31
Also published as: WO2018039986A1; CN109075932B

Abstract

A kind of reference signal configuration method is provided.This method comprises: central location determines whether to open or close the distribution unit in the overlay area of the central location；Wherein, the central location connects and controls multiple distribution units；High level in the central location carrying air interface protocols, and the low layer of distribution unit carrying air interface protocols；And the central location sends reference signal configuration message to the distribution unit, so that the distribution unit responds the reference signal configuration message and switches to the corresponding reference signal of transmission from transmission reference signal is stopped, or stops sending reference signal.Disclosed herein as well is relevant central location and distribution units.

Description

Reference signal configuration method, central location and distribution unit

Technical field

Embodiments herein relates generally to the communication technology, more particularly to a kind of reference signal (Reference Signal, RS) configuration method, central location (Central Unit, CU) and distribution unit (Distributed Unit, DU).

Background technique

In today that mobile communication is grown rapidly, in order to meet the mobile service and data volume demand of explosive growth, CU/ DU framework causes extensive concern.The illustrative example of CU and DU are shown in Fig. 1；In Fig. 1, a CU is connected and is controlled Multiple DU.In general, the low layer of DU carrying air interface protocols, and CU be then used to carry in a concentrated manner it is high-rise with In all DU.CU can realize more flexible DU networking (development) only by unlatching/closing of control DU, with drop The administration overhead of low DU, and promote the coordination between different DU, thus reduce whole power consumption.DU can also be referred to as transfer point (Transmission Point, TP), transmitting-receiving point (Transmission and Reception Point, TRP) or radio frequency are drawn Remote head (Radio Remote Head, RRH).CU can also be referred to as dedicated baseband processing unit (Building Baseband Unit, BBU), centralization BBU, centralized Radio Access Network (Radio Access Network, RAN) service Device, Cloud Server, or the virtual base station based on cloud framework baseband pool.

User equipment (UE) is commonly connected to the nearest DU for being likely to have good signal strength, higher to obtain Data throughout.When UE initiates new data transmission in the overlay area of CU or switches to another from the DU currently connected When DU simultaneously maintains data connection simultaneously, need to carry out DU selection.Therefore, DU in above-mentioned two situations is selected, UE needs The DU to be measured reference signal sent is measured to assess its signal strength/quality.In other words, every DU needs to send DU and refers to The reference signal of fixed (DU-specific) is so that UE is distinguished (distinguish) and is measured.

In the prior art, CU can turn off or on certain DU according to the access situation of UE and tidal effect etc..Each pass The DU closed can enter idle state, will not connect UE at this time to transmit data, but there is still a need for send to find reference signal (Discovery Reference Signal, DRS) measures for UE.DRS is the reference signal (Cell- that cell is specified Specific Reference Signal) interim sparse (sparser) version, and DRS and CRS it is then always on and by It statically distributes, thus may cause excessive power wastage.In addition, DRS and CRS only have 6 kinds of different resource unit figures Case, and different frequency shift (FS)s is respectively corresponded, different frequency shift (FS)s is designed to be used for avoid used in neighbouring DU Send the conflict between the running time-frequency resource of RS.However, certain neighbouring DU may be needed using phase when DU deployment density is larger Same RE pattern, so that conflict is likely occurred between running time-frequency resource, to bring interference.Even if in addition, the DU closed Using different from RE pattern used in adjacent DU, it is possible to which adjacent DU is sent using identical RE used in DRS Data, therefore DRS is possible to transmit with data and interfere.

Apply for content

Embodiments herein provides a kind of reference signal configuration method, central location and distribution unit, existing to solve Sending DRS by the DU closed in technology brings excessive power consumption and RS to RS (RS-to-RS) and RS to data (RS- To-data the problems such as interference) generated.

The application provides a kind of reference signal configuration method.The described method includes: CU determine whether to open or close it is described DU in the overlay area of CU.Wherein, the CU can connect and control multiple DU；The CU can carry air interface High level in protocol stack, and the DU can carry the low layer of air interface protocols；And the CU sends RS to the DU Message is configured, so that the DU responds the RS configuration message and switches to from stopping transmission RS and send corresponding RS, or is stopped Send RS.

Being used to indicate the RS configuration message that the DU stops sending RS may include: to stop hair for controlling the DU RS is sent to enter the cell (information element, IE) of close pattern.

Being used to indicate the DU and sending the RS configuration message of corresponding RS may include relevant RS parameter；The phase The RS parameter of pass include in sending cycle, sub-frame offset and resource unit (Resource Element, RE) pattern at least It is a kind of.Wherein, the sub-frame offset can be used to indicate which subframe in the sending cycle sends corresponding RS, and The RE pattern can be used to indicate that the mapping mode of the corresponding RS to the RE.

The RE pattern can be CSI-RS class or CRS class.

Determining whether to open or close the DU in the overlay area of the CU may include: the CU in the CU At least one access DU is selected in the overlay area.Sending the RS configuration message to the DU may include: in pass At least one access DU of close pattern sends the RS and configures message, so that at least one access DU can start to send out Send corresponding RS.

The RS configuration message may include sub-frame offset；The sub-frame offset is mainly for all of currently transmitted RS DU is used.

Selection at least one access DU may include: the distribution according at least to the DU, in the overlay area Selection at least one access DU, so that the transmission range of the RS of at least one access DU can cover the institute of the CU State overlay area.

Selection at least one access DU can also include: the only selection in the DU (DU in close pattern) of closing At least one access DU.

Selection at least one access DU can also include: DU access request of the response from UE and in the area of coverage At least one access DU is selected in domain.

The method may further include: list and relevant RS to UE transmission at least one access DU Parameter.

Determine whether that opening or closing the DU may include: that the CU determines whether to open institute according to the information of the first DU State the DU in overlay area；Wherein, the first DU is initial connection in the DU of at least one UE.RS configuration is sent to the DU Message may include: the CU to the first DU transmission the first RS configuration message, and into the DU adjacent with the first DU At least one DU closed sends the 2nd RS and configures message.

The first RS configuration message and the 2nd RS configuration message can include sub-frame offset.Wherein, described The sub-frame offset for including in first RS configuration message uses before can connecting at least one described UE with the first DU Sub-frame offset it is identical, and the 2nd RS configuration message in include the sub-frame offset can match with the first RS It is identical to set the sub-frame offset for including in message.

Determine whether that opening or closing the DU may include: the CU according to the UE handover information in the overlay area Determine whether to open the DU in the overlay area, be connect wherein including that at least switching is preceding in the handover information with the UE The information of the target DU of the UE connection after the information and switching of source DU.To the DU send RS configuration message may include: When not connecting with any UE after the source DU switching, the CU sends candidate RS to the source DU and configures message；And described When not connecting with any UE before target DU switching, the CU sends service RS to the target DU and configures message.

The candidate RS configuration message and service RS configuration message can include sub-frame offset.The candidate RS The sub-frame offset in the sub-frame offset for including in configuration message and the service RS configuration message can be with Sub-frame offset used in front of switching is identical.

Determine whether that opening or closing the DU may include: that the CU determines whether to close according to the information of DU to be closed The DU in the overlay area is closed, wherein the DU to be closed includes the DU (that is, the DU closed) for being in close pattern, owns Adjacent DU all in the DU DU of non-serving mode (that is, be in) of non-serving mode, the UE of all connections all become Idle state or Switch to all service DU of the overlay area of other CU.Sending RS configuration message to the DU may include: the CU to institute It states DU to be closed and sends the RS configuration message, so that the DU to be closed stops sending RS to enter close pattern.

The CU can be dedicated BBU, centralization BBU, centralization RAN server, Cloud Server, or be based on cloud framework The virtual base station of baseband pool.DU can be TP, TRP or RRH

Additionally provide a kind of reference signal configuration method.The described method includes: DU, which receives the RS from CU, configures message, Described in CU can connect and control multiple DU；The CU can carry the high level in air interface protocols, and described DU can carry the low layer of air interface protocols；And the DU responds the RS configuration message and switches from transmission RS is stopped RS is sent to the corresponding RS of transmission, or stopping.

Being used to indicate the RS configuration message that the DU stops sending RS may include: to stop hair for controlling the DU RS is sent to enter the IE of close pattern.

Being used to indicate the DU and sending the RS configuration message of corresponding RS may include relevant RS parameter；The phase The RS parameter of pass may include at least one of sending cycle, sub-frame offset and RE pattern.Wherein, the sub-frame offset It can be used to indicate which subframe in the sending cycle sends corresponding RS, and the RE pattern can be used to indicate that institute State the mapping mode of corresponding RS to the RE.

The RE pattern can be CSI-RS class or CRS class.

The method may further include: the DU sends the list and relevant RS parameter of DU to be measured to UE, Described in the list of DU to be measured include the access DU or DU adjacent with the DU.

Also provide a kind of CU, comprising: determining module is used to determine whether in the overlay area for opening or closing the CU DU, wherein the CU can connect and control multiple DU；The CU can carry the high level in air interface protocols, And the DU can carry the low layer of air interface protocols；And sending module, message is configured for sending RS to the DU, So that the DU responds the RS configuration message and switches to the corresponding RS of transmission from transmission RS is stopped, or stop sending RS.

The determining module can be used in the overlay area of the CU that at least one is selected to access DU.The hair Send module to can be used for sending the RS configuration message at least one access DU described in the close pattern so that it is described extremely A few access DU can start to send corresponding RS.

The determining module can be used for being determined whether according to the information of the first DU opening the DU in the overlay area；Its In, the first DU can be initial connection in the DU of at least one UE.The sending module can be used for the first DU The first RS configuration message is sent, and the DU that at least one is closed into the DU adjacent with the first DU sends the 2nd RS configuration and disappears Breath.

The determining module can be used for being determined whether according to the UE handover information in the overlay area opening DU, wherein It may include the UE connection after the information and switching of source DU being connect with the UE before at least switching in the handover information The information of target DU.The sending module can be used for when not connecting with any UE after the source DU switches, to the source DU It sends candidate RS and configures message；And it when not connect with any UE before target DU switching, sends and takes to the target DU Business RS configures message.

The determining module can be used for determining whether to close in the overlay area according to the information of DU to be closed DU.Wherein, the DU to be closed may include DU (that is, the DU for being in close pattern), all adjacent DU being set off All become Idle state all in the DU (that is, DU is in non-serving mode) of non-serving mode, the UE of all connections or switches to it The service DU of the overlay area of his CU.The sending module can be used for sending the RS configuration to the DU to be closed and disappear Breath, so that the DU to be closed stops sending RS to enter close pattern.

Also provide a kind of DU, comprising: receiving module configures message for receiving RS from CU, wherein the CU can be with It connects and controls multiple DU；The CU can carry the high level in air interface protocols, and the DU can carry sky The low layer of middle protocol stack of the interface；And respond module, hair is switched to from transmission RS is stopped for responding the RS configuration message Corresponding RS is sent, or stops sending RS.

The RE pattern can be CSI-RS class or CRS class.

The DU can also include: sending module, for sending the list and relevant RS parameter of DU to be measured to UE.Its In, the list of the DU to be measured may include the access DU or DU adjacent with the DU.

Also provide a kind of CU, comprising: including processor and the transceiver being connected to the processor.The processor can be with For: determine whether to open or close the DU in the overlay area of the CU；RS is sent to the DU by the transceiver to match Message is set, so that the DU can respond the RS configuration message and switch to the corresponding RS of transmission from transmission RS is stopped, or is stopped Only send RS.Wherein, the CU can connect and control multiple DU；The CU can be carried in air interface protocols High level, and the DU can carry the low layer of air interface protocols.

The RE pattern can be CSI-RS class or CRS class.

The processor can be used for: at least one being selected to access DU in the overlay area of the CU；And it is logical Cross the transceiver and send the RS configuration message at least one access DU described in the close pattern so that it is described at least One access DU can start to send corresponding RS.

The processor can be used for: according at least to the distribution of the DU, selection is described at least in the overlay area One access DU, so that the transmission range of the RS of at least one access DU can cover the overlay area of the CU.

The processor can be used for: at least one access DU is only selected in the DU of closing.

The processor can be used for: DU access request of the response from UE and selected in the overlay area it is described extremely A few access DU.

The processor may further be used for: send the list of at least one access DU and relevant to the UE RS parameter.

The processor can be used for: determine whether to open the DU in the overlay area according to the information of the first DU；Its In, the first DU is initial connection in the DU of at least one UE；And the is sent to the first DU by the transceiver One RS configures message, and the DU that at least one is closed into the DU adjacent with the first DU sends the 2nd RS and configures message.

The first RS configuration message and the 2nd RS configuration message may each comprise sub-frame offset.Wherein, described The sub-frame offset for including in first RS configuration message connect the son used before at least one described UE with the first DU Frame shifting amount can be identical, and the sub-frame offset for including in the 2nd RS configuration message disappears with the first RS configuration The sub-frame offset for including in breath can be identical.

The processor can be used for: determine whether to open the covering according to the UE handover information in the overlay area DU in region, wherein may include the information and switching of the preceding source DU being connect with the UE of at least switching in the handover information The information of the target DU of the UE connection afterwards；And when not connecting with any UE after source DU switching, pass through the transmitting-receiving Device sends candidate RS to the source DU and configures message, and when being in candidate pattern before the target DU switches, to the target DU sends service RS and configures message.

The candidate RS configuration message and service RS configuration message may each comprise sub-frame offset.The candidate RS The sub-frame offset for including in configuration message and the sub-frame offset and switching in the service RS configuration message Sub-frame offset used in preceding can be identical.

The processor can be used for: determine whether to close in the overlay area according to the information of DU to be closed DU, wherein the DU to be closed may include DU (that is, DU under close pattern), all adjacent DU being set off All become Idle state all in the DU (that is, the DU for being in non-serving mode) of non-serving mode, the UE of all connections or switches to The service DU of the overlay area of other CU；And the RS configuration is sent to the DU to be closed by the transceiver and is disappeared Breath, so that the DU to be closed stops sending RS to enter close pattern.

CU can be dedicated BBU, centralization BBU, centralization RAN server, Cloud Server, or be based on cloud framework base band The virtual base station in pond.DU can be TP, TRP or RRH

Also provide a kind of DU, comprising: processor and the transceiver being connected to the processor.The processor can be used In: the RS from CU is received by the transceiver and configures message；And the response RS configures message and sends RS from stopping It switches to and sends corresponding RS, or stop sending RS.Wherein, the CU can connect and control multiple DU；The CU can To carry the high level in air interface protocols, and the DU can carry the low layer of air interface protocols.

The RE pattern can be CSI-RS class or CRS class.

The processor can be also used for: the list and relevant RS parameter of DU to be measured are sent to UE, wherein it is described to The list of the DU of survey may include the access DU or DU adjacent with the DU.

The advantages of the application, is as follows.CU can send RS to DU and configure message, and DU is enabled to stop sending RS and hair It send and switches between corresponding RS, so that DU can just send RS when needed.It is all non-compared in current LTE standard The DU of service still sends DRS, and power consumption can be reduced by stopping transmission RS in the application.In addition, the DU for stopping sending RS is not required to RE pattern is occupied, so that the DU sum of competition RE pattern is reduced, thus reduces and running time-frequency resource punching occurs between different DU A possibility that prominent, and reduce the interference that reference signal generates data.

Detailed description of the invention

Fig. 1 is the schematic diagram for showing CU/DU framework；

Fig. 2 is the flow chart according to the first embodiment of the reference signal configuration method of the application；

Fig. 3 is the flow chart according to the second embodiment of the reference signal configuration method of the application；

Fig. 4 is the schematic diagram of selection access DU in the second embodiment of reference signal configuration method；

Fig. 5 is the flow chart according to the 3rd embodiment of the reference signal configuration method of the application；

Fig. 6 is the flow chart according to the fourth embodiment of the reference signal configuration method of the application；

Fig. 7 is the flow chart according to the 5th embodiment of the reference signal configuration method of the application；

Fig. 8 is that DU switches between three kinds of operating modes in the embodiment according to the reference signal configuration method of the application Schematic diagram；

Fig. 9 is that there is no be directly connected between UE and CU in the embodiment according to the reference signal configuration method of the application In the case where UE and DU establish the flow chart of connection；

Figure 10 is to exist to be directly connected between UE and CU in the embodiment according to the reference signal configuration method of the application In the case where UE and DU establish the flow chart of connection；

Figure 11 is the flow chart according to the sixth embodiment of the reference signal configuration method of the application；

Figure 12 is the flow chart according to the 7th embodiment of the reference signal configuration method of the application；

Figure 13 is the structural block diagram according to the first embodiment of the CU of the application；

Figure 14 is the structural block diagram according to the second embodiment of the CU of the application；

Figure 15 is the structural block diagram according to the first embodiment of the DU of the application；

Figure 16 is the structural block diagram according to the second embodiment of the DU of the application；

Figure 17 is the structural block diagram according to the 3rd embodiment of the DU of the application.

The present invention include to " one embodiment ", " specific embodiment ", " some embodiments ", " different embodiments " or The reference of " embodiment ".Phrase " one embodiment ", " specific embodiment ", " some embodiments ", " different embodiments " or " reality Apply example " appearance do not refer to identical embodiment.Specific feature, structure or characteristic can be with mode quilts consistent with the present invention Combination.

Different module, unit, circuit or other assemblies can be described or claimed for " being configured to " execute one or Multiple tasks.In these contexts, " being configured to " is used to be included in the operation phase by indicating module/unit/circuit/component Between execute the structure (for example, circuit) of these one or more tasks to imply structure.Therefore, module/unit/circuit/component It it is said that task can be configured to execute, or even in specific module/unit/circuit/component is currently inoperable (example Such as, it is not at open mode) when.Module/unit/circuit/the component being used together with " being configured to " language includes hardware- For example, circuit, be stored with it is executable with memory of program instruction for implementing operation etc..For module/unit/circuit/component, Module/the unit/circuit/component " being configured to " executes obviously being not intended to for one or more tasks and quotes 35U.S.C. § 112 (f).In addition, " being configured to " may include universal architecture (for example, universal circuit), by software and/or firmware (for example, FPGA or the general processor for executing software) encapsulation, it is operated in a manner of by the way that discussing for task can be executed." quilt It is configured to " it also may include adapting processing flow (for example, semiconductor fabrication equipment) to manufacturing equipment (for example, integrated electricity Road), it is used to be practiced or carried out one or more tasks.

As used herein, term "based" describes one or more factors, influences judgement.The term is not excluded for can It can influence the extra factor of the judgement.That is, judgement can be and be based solely on these factors or be at least partially based on this A little factors.In view of phrase " judging A based on B ".When in this case, B is the factor for influencing the judgement of A, and this phrase is not It excludes to judge A also based on C.In other cases, A can be based solely on B and be judged.

Specific embodiment

Referring to Fig.2, Fig. 2 describes the first embodiment of reference signal configuration method.For ease of description, this method is suitable Sequence description.However, part of the invention can be executed using other sequences, or parallel execution (such as being performed simultaneously). This method can be executed by CU, which includes central controller, such as dedicated baseband processing unit (Building Baseband Unit, BBU), centralization BBU, centralized Radio Access Network (Radio Access Network, RAN) service Device, Cloud Server, or the virtual base station based on cloud framework baseband pool.The CU can carry higher association in air interface protocols Discuss layer, such as Packet Data Convergence Protocol (Packet Data Convergence Protocol, PDCP) etc..In general, CU is also responsible for the communication with core net.This approach includes the following steps.

In S11, CU may determine whether to open or close the distribution unit (Distributed in the overlay area of CU Unit,DU)。

DU can be transfer point (Transmission Point, TP), transmitting-receiving point (Transmission and Reception Point, TRP) or remote radio head (Radio Remote Head, RRH).In general, connecing according to UE Enter demand to determine whether to open or close DU.Particularly, can open have connected UE, connection probability it is larger (such as with Have connected the adjacent DU of the DU of UE) DU.On the contrary, the lesser DU of probability of connection UE will be closed.CU can also be according to other Demand or condition open or close DU.UE can be fixed be also possible to be movable to from a place it is another vicinal, Can for include but is not limited to cellular phone, it is personal digital assistant (Personal Digital Assistants, PDA), wireless Modem, tablet computer, laptop, wireless phone etc..

In S12, CU can send reference signal configuration message to DU.

The operating mode of DU can be divided into two kinds of opening and closing according to whether sending reference signal.In open mode DU can be in each subframe or the transmission SR per several subframes.Respond reference signal configuration message, DU can in open mode and Switch between close pattern.Specifically, DU can send corresponding reference signal from stopping sending reference signal switching to, or from hair It send reference signal to switch to stopping and sends reference signal.For the DU (i.e. DU is in open mode) of unlatching, can with according to whether Connection UE can be further divided into the DU of the service and DU of candidate to transmit data, that is, be in service mode and candidate pattern DU.

The frequency that the DU (that is, DU of connection UE) of service sends reference signal can be higher than candidate DU (that is, being not connected to UE DU).That is, the period that the DU of service sends reference signal can be less than candidate DU.When DU is turned on, DU can respond ginseng It examines signal configuration message and dynamic adjustment is carried out to the reference signal parameter of transmission.

CU can only to needing, beginning or stopping send reference signal or the changed DU of reference signal parameter is sent Reference signal configuration message.Optionally, CU can also unify to send reference signal configuration message to all DU.

According to the present embodiment, CU can send reference signal configuration message to DU, so that DU is stopping sending reference signal And send and switch between corresponding reference signal, so that DU only can just send reference signal when needed, it is achieved in The transmission of the reference signal of event triggering type.All DU in close pattern are still sending DRS's in compared with the prior art Close pattern stops in the application sending reference signal more energy saving.In addition, the DU for stopping sending reference signal is not required to occupy RE Pattern so that competition RE pattern DU sum reduce, thus reduce between different DU occur running time-frequency resource conflict can Energy property, and reduce the interference that reference signal generates data.

In a particular embodiment, reference signal configuration message includes reference signal parameter configuration signaling and closing signaling.Its In, closing signaling is used to indicate (instruct) DU and stops sending reference signal, including stops transmission with reference to letter for controlling DU Number with enter close pattern closing cell (information element, IE).Reference signal parameter configuration signaling is for referring to Show that DU sends corresponding reference signal, including relevant reference signal parameter.Optionally, reference signal configuration message can be wrapped only A control signaling is included, or including a plurality of control signaling.

Relevant reference signal parameter may include at least one of sending cycle, sub-frame offset and RE pattern.Son Frame shifting amount can be used for indicating which subframe in sending cycle sends corresponding reference signal, and RE pattern is then used to indicate Mapping mode of the corresponding reference signal to RE.RE pattern can for CSI-RS (CSI-RS-like) class or CRS (CRS- Like) class.CSI-RS class refers to using channel state information reference signals (Channel State Information Reference Signal, CSI-RS) a kind of mapping mode, and CRS class then refers to using cell specific reference signal The mapping mode of (Cell-specific RS, CRS) one kind.Certainly, which is not limited to above-mentioned method, can also To use other suitable mapping modes.

In existing LTE/LTE-A standard, CRS/DRS and CSI-RS can be measured by UE, thus as DU selection Basis.In terms of the RE pattern of CRS, according to the physical district ID (physical cell ID, PCI) of BS with 6 mod function As a result, there are 6 kinds of different RE patterns.CRS is transmitted in each subframe of each resource block (Resource Block, RB), And the transmission cycle of DRS is 40-160 subframe.In terms of CSI-RS, a total of 40 possible positions RE are so that CSI-RS is in RB It uses in (RB-pair).Except 40 possible positions RE (out of), according to the quantity of used antenna port, Every CSI-RS can obtain 2,4 or 8 RE.Therefore, a total of up to 20 RE patterns or so-called CSI-RS configuration. However, the use of which CSI configuration being determined by antenna port measurement.Therefore, once it is determined that antenna port, is used for CSI- The RE pattern of RS is fixed.Wherein, the transmission cycle of CSI-RS is usually 5-80 subframe.

The sending cycle of reference signal can refer to CRS/DRS or CSI-RS decision in current standard, can also voluntarily set It sets.

Under the larger environment of DU deployment density, if adjacent DUs is needed using same RE pattern and reference signal Period is identical, then can by the way that different sub-frame offset is arranged, so that different DU sends reference signal in different subframes, Thus it avoids because of the limited and possible running time-frequency resource conflict of the type of RE pattern, to reduce interference.But different son The subframe sum that frame shifting amount may make UE need to measure increases, so as to cause the raising of power consumption.By introducing CSI- The RE pattern of RS class, can increase the number of species of RE pattern, need it is possible thereby to greatly reduce adjacent DU using same RE pattern the case where the probability that occurs.At this point, identical sub-frame offset and sending cycle can be used in adjacent DU, so that The subframe sum that UE needs to measure is reduced, to reduce power consumption.It is of course also possible to using different sub-frame offset and/ Or sending cycle.

The second embodiment of reference signal configuration method is described referring momentarily to Fig. 3, Fig. 3, is in reference signal configuration side On the basis of method first embodiment, DU is opened in such a way that selection accesses DU.For ease of description, this method is that sequence describes 's.However, part of the invention can be executed using other sequences, or parallel execution (such as being performed simultaneously).This implementation Example is the extension of first embodiment, therefore content identical with the application reference signal configuration method first embodiment is herein no longer It repeats.Method discussed below may comprise steps of.

In S111, CU can select at least one to access DU in the overlay area of the CU.

It, can be with for example, when DU has just been switched on or when in idle mode when UE does not establish data connection with any DU One group of DU is measured and selects a DU for connecting.It is referred to as this group of DU of the UE measurement not connect with any DU Access DU.

CU can the distribution in overlay area according at least to DU select at least one access DU so that at least one access DU The transmission range of reference signal can cover the entire overlay area of CU so that Anywhere needing DU in overlay area The UE of access can detect the reference signal that at least one access DU is sent.For example, it is assumed that the covering of CU All DU in region are not connect with any UE, and three DU for using the box of dotted line to outline at this time are selected as access DU, these accesses DU are in open mode and send reference signal for UE measurement；And remaining DU is then in close pattern.CU Access DU can be only selected in the DU of closing.Alternatively, the DU of unlatching can also be included in range of choice.

In S112, CU can send reference signal configuration message to the access DU in close pattern, so that access DU can start to send corresponding reference signal to enter candidate pattern.

CU can also send reference signal configuration message to the access DU under open mode, therefore accessing DU can basis Reference signal configuration message is adjusted the reference signal parameter of transmission.

Reference signal configuration message may include sub-frame offset, and the sub-frame offset is mainly for being currently at candidate pattern It is used with all DU of service mode, to reduce the subframe sum that UE needs to measure.

The 3rd embodiment of the application reference signal configuration method is described referring momentarily to Fig. 5, Fig. 5, is joined in the application On the basis of examining symbol arranging method first embodiment, by obtaining the information of the first DU to open DU.For ease of description, originally Method is that sequence describes.However, part of the invention can be executed using other sequences, or parallel execution (such as it is same Shi Zhihang).The present embodiment is the extension to the application reference signal configuration method first embodiment, therefore with the application with reference to letter Details are not described herein for number identical content of configuration method first embodiment.Method in discussion may comprise steps of.

In S121, CU can determine whether to open in overlay area according to the information of the first DU in overlay area DU。

First DU can be the DU of at least one UE of initial connection.In general, the first DU can be to be connected to one less Candidate DU before UE.In some cases, such as between UE and CU it deposits when connected directly, then the first DU may be connection The DU of close pattern is in front of at least one UE.CU can control the first DU and enter service mode, and open and the first DU Adjacent DU.It is appreciated that the first DU can be advanced into service mode certainly.

In S122, CU can send the first reference signal configuration message to the first DU, and at least one and the first DU The DU closed in adjacent DU sends the second reference signal configuration message.

First DU can respond the first reference signal configuration message and enter service mode, and closed in the first DU adjacent DU DU can then respond the second reference signal configuration message and enter candidate pattern.The DU being had turned in the DU adjacent for the first DU, CU can not send reference signal configuration message, or can also send reference configuration information, for example to modify its reference signal Parameter with the first DU to match.

The sending cycle for including in first reference signal configuration message can be less than wrapping in the second reference signal configuration message The sending cycle included.Further, the sending cycle for including in the first reference signal configuration message can be the second reference signal The integral multiple for the sending cycle for including in configuration message.Optionally, the sending cycle for including in the first reference signal configuration message It can also be identical as the sending cycle for including in the second reference signal configuration message.

First reference signal configuration message and the second reference signal configuration message may each comprise sub-frame offset.First ginseng Examine signal configuration message in include sub-frame offset can connect at least one UE with the first DU before (that is, the first UE is in When candidate pattern) sub-frame offset that uses is identical, and the sub-frame offset for including in the second reference signal configuration message can be with It is identical as the sub-frame offset for including in the first reference signal configuration message, therefore UE needs the subframe sum measured that can subtract It is few.

The fourth embodiment of the application reference signal configuration method is described referring momentarily to Fig. 6, Fig. 6, is joined in the application On the basis of examining symbol arranging method first embodiment, switched by obtaining in the UE in overlay area between difference DU (switch) information is to open DU.For ease of description, this method is that sequence describes.However, part of the invention can adopt It is executed with other sequences, or parallel execution (such as being performed simultaneously).The present embodiment is to the application reference signal configuration side The extension of method first embodiment, therefore content identical with the application reference signal configuration method first embodiment is no longer superfluous herein It states.Method in discussion may comprise steps of.

In S131, CU can determine whether to open the DU in overlay area according to the UE handover information in overlay area.

Handover information may include after the information and switching of source (Source) DU being connect with UE before at least switching with UE company The information of target (Target) DU connect.In general, target DU is adjacent with source DU.

In S132, if do not connect with any UE after source DU switching, CU can send candidate reference signals to source DU Configure message；If do not connect with any UE before target DU switching, CU can send the configuration of service reference signal to target DU Message.

In general, source DU may be at service mode before the handover.Therefore, if source DU UE switching after not with it is any UE connection, since source DU is adjacent with target DU, CU may need to send candidate reference signals configuration message to source DU, will Source DU switches to candidate pattern from service mode.It is to be appreciated that source DU voluntarily can switch to time from service mode as needed Lectotype.In some embodiments, if source DU is not adjacent with target DU, CU can close source DU.

In general, target DU is in service mode after UE switching.Therefore, if target DU UE switching before not with Any UE connection (that is, being in candidate pattern), then CU may need to send service reference signal configuration message to target DU, will Target DU switches to service mode from candidate pattern.

If source DU is after UE switching or target DU is in service mode before UE switching, CU, which can choose, not to be sent Reference signal configuration message, or also can choose the ginseng for sending reference signal configuration message to modify source DU and/or target DU Examine signal parameter.

The sending cycle for including in candidate reference signals configuration message, which can be greater than in service reference signal configuration message, wraps The sending cycle included.Further, the sending cycle for including in candidate reference signals configuration message can be service reference signal The integral multiple for the sending cycle for including in configuration message.Optionally, the sending cycle for including in candidate reference signals configuration message It is identical the sending cycle for including in message can also to be configured with service reference signal.

Candidate reference signals configuration message and service reference signal configuration message may each comprise sub-frame offset.Candidate's ginseng Examine the sub-frame offset phase that the sub-frame offset in signal configuration message uses when being in service mode with source DU (that is, before switching) Together.The sub-frame offset phase that sub-frame offset in service reference signal configuration message uses when being in candidate pattern with target DU Together.

The 5th embodiment of the application reference signal configuration method is described referring momentarily to Fig. 7, Fig. 7, is joined in the application On the basis of examining symbol arranging method first embodiment, by obtaining the information of DU to be closed to close DU.The present embodiment is pair The extension of the application reference signal configuration method first embodiment, thus with the application reference signal configuration method first embodiment Details are not described herein for identical content.Method in discussion may comprise steps of.

In S141, CU can determine whether the DU closed in overlay area according to the information of DU to be closed.

DU to be closed may include being arranged in DU (that is, close DU), all adjacent DU of close pattern The UE of candidate DU and all connections in non-serving mode become idle mode or switching (handover) to other CU Overlay area service DU.CU can discharge the reference signal parameter that DU to be closed is occupied, it can by with it is to be closed The identical reference signal parameter of the reference signal parameter that DU is used is reassigned to other DU.

In S142, CU can send reference signal configuration message to DU to be closed.

In this way, DU to be closed can stop sending reference signal, and enter close pattern.

In a specific embodiment, CU can make DU in three kinds of operating modes by sending reference signal configuration message to DU Between switch, switching condition is specifically as shown in Figure 8.In summary, judge DU be in which kind of operating mode principle it is as follows: with UE The DU of connection is in service mode, does not connect with any UE but is likely to establish with UE at therefore DU that connection needs to be measured by UE In candidate pattern, and be unsatisfactory for candidate pattern and service mode condition (do not need to be surveyed by any UE that is, not connecting with any UE yet Amount) DU be in close pattern.

Specifically, as shown in figure 8, for servicing DU (that is, connecting with UE and then at the DU of service mode), if institute There is the UE of connection to become idle mode or switching (handover) to the overlay area of other CU, then servicing DU will be closed, And thus enter close pattern., whereas if service DU does not service any UE, and UE of at least one connection switch to it is adjacent DU, such as the UE of part connection enters idle mode or switching (handover) to the overlay area and at least one of other CU The UE that a UE switches to adjacent DU or all connections switches to adjacent DU, then candidate pattern will be become by servicing DU.With Afterwards, it for candidate DU, attempts access DU and then succeeds to connect with the DU if there is any UE, then the candidate DU becomes to service DU.On the other hand, if being not on adjacent DU (the situation a), or if candidate DU is set to off die closing of service mode (situation b), then candidate DU is turned into the DU of closing to formula.Here, candidate DU be set to off close pattern refer to the candidate DU from It accesses in the list of DU and deletes.For the DU of closing, if there is in service mode arbitrary neighborhood DU (situation a), or If the DU closed is arranged to access DU, (situation b), the DU closed will will become candidate DU.

It should be noted that DU can be cut under the instruction of CU or voluntarily between service mode and candidate pattern It changes.When DU switches between service mode and candidate pattern, if reference signal parameter used in service mode and time Reference signal parameter used in lectotype is identical, then CU will not send reference signal configuration message to DU.

In the present embodiment, needing the DU measured by UE includes accessing DU and the DU adjacent with service DU.In some implementations In example, need the DU measured by UE that can also only include the access DU or DU adjacent with service DU.Optionally, adjacent with service DU DU also could alternatively be at a distance from the first DU be less than preset value DU.

It should be noted that CU it may also be desirable to inform UE DU's to be measured other than sending reference signal configuration message List and relevant reference signal parameter.According to the presence or absence of being directly connected to, sent between UE and CU the list of DU to be measured with And the above process of reference signal parameter can be divided into two kinds, the main distinction is that the list that DU to be measured is sent by CU or DU And relevant reference signal parameter.For not establishing the UE of connection with DU, the list of DU to be measured can refer to the accession to the list of DU. For establishing the UE of connection with DU, DU list to be measured can refer to the list of the DU adjacent with the DU currently connected.

For example, Fig. 9 is shown between UE and CU there is no in the case where being directly connected to, connection is established between UE and DU Detailed process.The process is suitable for following situations: for example, CU does not assemble antenna, thus causing CU that can not establish with UE direct Connection；Or UE does not establish connection etc. also with CU.Therefore, CU needs that the list and relevant reference signal parameter of DU will be accessed It is sent to DU, and the list of the access DU in system information and relevant reference signal parameter are then issued UE by DU.UE can To read system information, to obtain the list and relevant reference signal parameter of access DU, and DU is thus detected and selects, so It is synchronized to the DU chosen afterwards to carry out random access, therefore, the connection between UE and DU is then achievable.

Figure 10 is shown between UE and CU in the presence of in the case where being directly connected to, and the specific mistake of connection is established between UE and DU Journey.The process is suitable for UE and CU and maintains to connect, and between UE and DU in the case where the Idle state.Therefore, as shown in the figure, CU can respond the DU access request from UE and select access DU in overlay area, or not receive appointing from UE What voluntarily selects access DU in the case where requesting.Then CU can directly join the list for accessing DU and relevant reference signal Number is sent to UE, such as sets message by using the RRC connection reconfiguration in LTE/LTE-A standard and be sent to UE.UE can receive Thus the list and relevant reference signal parameter for accessing DU, and detect and select DU, be then synchronized to the DU that chooses with into Row random access, therefore the connection between UE and DU can then be completed.Here random access only carries out between UE and DU, Because of existing connection between UE and CU.After UE is connected with DU, the DU of CU and connection UE can cooperate in dual link Or under carrier aggregation mode.

The step of CU sends DRS (Dedicated Reference Signal) configuration message to DU is not shown in Fig. 9 and Figure 10, this is because, it is assumed that The access DU of CU selection is the DU having turned on, then CU, which can choose, does not send reference signal configuration message to access DU.If CU to DU send reference signal configuration message, then the step execute should CU or DU to UE send access DU list and Before the step of relevant reference signal parameter.

After UE completes to establish connection (including be initially accessed and switch) with the DU that chooses, in addition to controlling the DU chosen And DU adjacent thereto is carried out except necessary operating mode switching, CU it may also be desirable to direct or through the DU that chooses to UE sends the list and relevant reference signal parameter of DU to be measured；Wherein, DU to be measured refers to the DU adjacent with the DU chosen.

Figure 11 shows the sixth embodiment of the reference information configuration method according to the application, and this method is by for carrying sky The DU of lower protocol layer is executed in middle protocol stack of the interface.For ease of description, this method is that sequence describes.However, this hair Bright part can be executed using other sequences, or parallel execution (such as being performed simultaneously).Although have not determined how How air interface protocols are divided between CU and DU, thinks that DU at least will manage layer by carrier however, having reached common understanding.The party Method may comprise steps of.

In S21, DU can receive the reference signal configuration message from CU.

The operating mode of DU can be according to whether sending reference signal be divided into two kinds of opening and closing.It, can for the DU of unlatching According to whether connection UE is in service mode or candidate to be further divided into service DU and candidate DU for data transmission The DU of mode.The frequency that DU in service mode (i.e. connection UE) sends reference signal can be higher than in candidate pattern (i.e. Not connected UE) DU send the frequency of reference signal.It is sent that is, the period that service DU sends reference signal can be less than candidate DU The period of reference signal.No matter which kind of operating mode DU is in, and can be come from by the interface being configured between CU and DU The reference signal configuration message of CU.

In S22, DU switches to the corresponding ginseng of transmission in response to reference signal configuration message and from transmission reference signal is stopped Signal is examined, or stops sending reference signal.

When DU is in open mode, can stop sending reference signal or right in response to reference signal configuration message The reference signal parameter of transmission carries out dynamic adjustment, such as switches between candidate pattern and service mode.When DU is in pass When close pattern, it can start to send corresponding reference signal in response to reference signal configuration message.

According to the embodiment of above-described embodiment, CU can send reference signal configuration message to DU, so that DU is stopping sending out It send reference signal and sends and switch between corresponding reference signal.Therefore, DU only can just send reference signal when needed, by This realizes the reference signal transmission of event triggering type.The DU of all closings is still sending DRS, the application in compared with the prior art It is more energy saving that middle stopping sends reference signal.In addition, the DU for stopping sending reference signal is not required to occupy RE pattern, constitute competition RE The DU sum of pattern is reduced, and thus reduces a possibility that running time-frequency resource conflict occurs between different DU, and reduce with reference to letter Interference number to data (RS-to-data).

The 7th embodiment of the application reference signal configuration method is described referring momentarily to Figure 12, Figure 12, is in the application On the basis of reference signal configuration method sixth embodiment, further comprise the steps.

In S23, DU can send the list and relevant reference signal parameter of DU to be measured to UE.

In step S22, if DU switches to open mode from close pattern, the execution of this step should be in step After S22.Before executing this step, DU can generally receive the list and relevant reference signal parameter of DU to be measured from CU. It receives suitable between the reference signal configuration message of list and relevant reference signal parameter and reception from CU of DU to be measured Sequence is simultaneously not limited.

The list of DU to be measured may include the access DU and DU adjacent with access DU.For not establishing connection with the DU UE, the list of DU to be measured can refer to the accession to the list of DU.And the UE for establishing connection with the DU, the list of DU to be measured can To refer to the list of the DU adjacent with the DU currently connected.

The block diagram of the first embodiment of CU is described referring momentarily to Figure 13, Figure 13.The CU can include determining that module 11 with And sending module 12.

Wherein it is determined that module 11 can be used to determine whether to open or close the DU in the overlay area of CU.Wherein, CU can To connect and control multiple DU, and CU can carry the high level in air interface protocols, and DU can then carry air interface Low layer in protocol stack.

Sending module 12 can be used for sending reference signal configuration message to DU, so that DU can respond reference signal configuration and disappear It ceases and switches to the corresponding reference signal of transmission from transmission reference signal is stopped, or stop transmission reference signal.

Specifically, it is determined that module 11 can be used in the overlay area of CU that at least one is selected to access DU.Sending module 12 It then can be used for sending reference signal configuration message at least one access DU in close pattern, so that access DU starts to send Corresponding reference signal is to enter candidate pattern.

Specifically, it is determined that module 11 can be used for being determined whether according to the information of the first DU in overlay area opening covering DU in region.Wherein, the first DU is the DU of at least one UE of initial connection.Sending module 12 can be used for sending to the first DU First reference signal configuration message, and the DU that at least one is closed into the DU adjacent with the first DU sends the second reference signal and matches Set message.

Specifically, it is determined that module 11 can be used for being determined whether according to the UE handover information in overlay area opening DU.Wherein, Handover information may include the information for the target DU being connect after the information and switching of source DU being connect before at least switching with UE with UE.Hair When sending module 12 then can be used for after source DU switches not connecting with any UE, candidate reference signals are sent to source DU and configure message, And when not connect with any UE before target DU switching, service reference signal is sent to target DU and configures message.

Specifically, it is determined that module 11 can be used for being determined whether according to the information of DU to be closed closing in overlay area DU.Wherein, DU to be closed includes the candidate DU of the DU being set off, all adjacent DU all in non-serving mode, and The UE of all connections becomes idle mode or switches the service DU of (handover) to the overlay area of other CU.And send mould Block 12 then can be used for sending reference signal configuration message to DU to be closed, so that DU stops sending reference signal to enter pass Close pattern.

It is the block diagram of the second embodiment of CU referring momentarily to Figure 14, Figure 14.The CU may include processor 110 and transceiver 120.Wherein, which can pass through bus couple processor 110.

Transceiver 120 can be used for sending and receiving data, be the interface that CU is communicated with other communication equipments.

Processor 110 can control the operation of CU, and processor 110 can also be known as CPU (Central Processing Unit, central processing unit).Processor 110 can be a kind of IC chip with signal handling capacity, such as general Processor, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit (Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate, transistor logic or discrete hardware components.General place Reason device can be microprocessor or any conventional processor.

CU may further include memory (not shown), instruction necessary to working for storage processor 110 and number According to.Memory also can store the received data of transceiver 120.

Processor 110 can be used for: determine whether to open or close the DU in overlay area；By transceiver 120 to DU Reference signal configuration message is sent, so that DU switches to hair in response to reference signal configuration message and from transmission reference signal is stopped Corresponding reference signal is sent, or stops sending reference signal.Wherein, CU can connect and control multiple DU.CU can carry sky High level in middle protocol stack of the interface, and DU can then carry the low layer in air interface protocols.

Being used to indicate the reference signal configuration message that DU stops sending reference signal includes stopping sending ginseng for controlling DU Signal is examined to enter the cell (information element, IE) of close pattern.

Being used to indicate DU and sending the reference signal configuration message of corresponding reference signal may include relevant reference signal Parameter.Wherein, relevant reference signal parameter may include at least one of sending cycle, sub-frame offset and RE pattern. Wherein, sub-frame offset can be used to indicate which subframe in sending cycle sends corresponding reference signal, and RE pattern Then can be used to indicate that corresponding reference signal to RE mapping mode.

RE pattern can be CSI-RS class or CRS class.

Processor 110 can be used for: at least one being selected to access DU in the overlay area of CU；And by transceiver to At least one access DU in close pattern sends reference signal configuration message, corresponds to so that access DU can start to send Reference signal with enter candidate pattern.

Reference signal configuration message may include sub-frame offset, and the sub-frame offset is mainly for being currently at candidate pattern It is used with all DU of service mode.

Specifically, the distribution that processor 110 can be used in overlay area according at least to DU selects at least one access DU, so that the transmission range of the reference signal of at least one access DU can cover the overlay area of CU.

Specifically, processor 110 can be used for that at least one is only selected to access DU in the DU of closing.

Specifically, processor 110 can be also used for responding the DU access request from UE and selected in overlay area to A few access DU.

Specifically, processor 110 can be also used for the list that at least one access DU is sent to UE and relevant reference letter Number parameter.

Specifically, processor 110 can be used for: be determined whether to open the area of coverage according to the information of the first DU in overlay area DU in domain, wherein the first DU is the DU of at least one UE of initial connection；First is sent with reference to letter to the first DU by transceiver 120 Number configuration message, and into the DU adjacent with the first DU at least one close DU send second reference signal configuration message.

Specifically, the first reference signal configuration message and the second reference signal configuration message include sub-frame offset.The The sub-frame offset for including in one reference signal configuration message can connect the subframe used before at least one UE with the first DU Offset is identical, and the sub-frame offset for including in the second reference signal configuration message can be with the first reference signal configuration message In include sub-frame offset it is identical.

Specifically, processor 110 can be used for: be determined whether to open the area of coverage according to the UE handover information in overlay area DU in domain, the target wherein being connect after the information and switching including the source DU being connect before at least switching with UE in handover information with UE The information of DU；And when not connect with any UE after source DU switching, candidate reference signals are sent to source DU by transceiver and are matched When setting message, and not connect with any UE before target DU switching, service reference signal is sent to target DU and configures message.

Specifically, candidate reference signals configuration message and service reference signal configuration message can include sub-frame offset Amount.Candidate reference signals configure message and service reference signal configuration message included in sub-frame offset can with before switching Used sub-frame offset is identical.

Specifically, processor 110 can be used for: determined whether to close DU in overlay area according to the information of DU to be closed, Wherein DU to be closed may include the candidate DU of the DU being set off, all adjacent DU all in non-serving mode, with And the UE of all connections becomes idle mode or switches to the service DU of the overlay area of other CU；And by transceiver to DU to be closed sends reference signal configuration message, so that DU to be closed stops sending reference signal to enter closing mould Formula.

CU can be dedicated baseband processing unit (Building Baseband Unit, BBU), centralization BBU, concentration Formula Radio Access Network (Radio Access Network, RAN) server, Cloud Server, or based on cloud framework baseband pool Virtual base station.DU can be transfer point (Transmission Point, TP), transmitting-receiving point (Transmission and Reception Point, TRP) or remote radio head (Radio Remote Head, RRH).

It can refer to the associated description in corresponding embodiment of the method according to the function of the various components of the CU of the present embodiment, This is not repeated.

The block diagram of the first embodiment of DU is described referring momentarily to Figure 15, Figure 15.DU may include receiving module 21 and Respond module 22.

Receiving module 21 can be used for receiving the reference signal configuration message from CU.Wherein, CU can connect and control Multiple DU.In general, DU is used to carry the low layer in air interface protocols, and CU is then responsible for carrying height in a concentrated manner Layer is to be used for all DU.

Respond module 22 can be used for switching to transmission from transmission reference signal is stopped in response to reference signal configuration message Corresponding reference signal, or stop sending reference signal.

The second embodiment of DU is described referring momentarily to Figure 16, Figure 16, is on the basis of the first embodiment of DU, into one Step includes sending module 23.

Wherein, sending module 23 can be used for sending the list and relevant reference signal parameter of DU to be measured to UE.Wherein, The list of DU to be measured may include the access DU or DU adjacent with DU.

Specifically, DU is used to indicate to stop sending the reference signal configuration message of reference signal may include for controlling DU Stop sending IE of the reference signal to enter close pattern.

Specifically, being used to indicate DU and sending the reference signal configuration message of corresponding reference signal may include relevant ginseng Examine signal parameter；Wherein, relevant reference signal parameter may include in sending cycle, sub-frame offset and RE pattern at least It is a kind of.Wherein, sub-frame offset can be used to indicate which subframe in sending cycle sends corresponding reference signal, and RE Pattern then can be used to indicate that corresponding reference signal to the mapping mode of RE.

Specifically, RE pattern can be CSI-RS class or CRS class.

Referring momentarily to Figure 17, the 3rd embodiment of DU may include: processor 210 and pass through with the processor 210 total The transceiver 2200 of line connection.

Transceiver 220 can be used for sending and receiving data, be the interface that DU is communicated with other communication equipments.

Processor 210 can control the operation of DU, and processor 210 can also be known as CPU (Central Processing Unit, central processing unit).Processor 210 can be a kind of IC chip with signal handling capacity, such as general Processor, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit (Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate, transistor logic or discrete hardware components.General place Reason device can be microprocessor or any conventional processor.

DU may further include memory (not shown), instruction necessary to working for storage processor 210 and number According to.Memory also can store the received data of transceiver 220.

Processor 210 can be used for: receive the reference signal configuration message from CU by transceiver 220；And response Reference signal configuration message and send corresponding reference signal from stopping sending reference signal switching to, or stop sending with reference to letter Number.Wherein, CU can connect and control multiple DU.In general, DU can be used for carrying the low layer in air interface protocols, And CU is responsible for carrying high level in a concentrated manner then to be used for all DU.

Specifically, being used to indicate DU and sending the reference signal configuration message of corresponding reference signal may include relevant ginseng Examine signal parameter；Wherein, relevant reference signal parameter may include in sending cycle, sub-frame offset and RE pattern at least It is a kind of.Wherein, sub-frame offset can be used to indicate which subframe in sending cycle sends corresponding reference signal, and RE Pattern is then used to indicate corresponding reference signal to the mapping mode of RE.

Specifically, RE pattern is CSI-RS class or CRS class.

Processor 210 can be also used for the list that DU to be measured is sent to UE and relevant reference signal parameter.Wherein, to be measured The list of DU may include the access DU or DU adjacent with DU.

It can refer to the associated description in corresponding embodiment of the method according to the function of the various components of the DU of the present embodiment, This is not repeated.

It should be appreciated that disclosed CU, DU and method also may be implemented in other ways.Certainly, above to be retouched The CU and DU stated is only schematical, for example, the division of module or unit is only a kind of logical function partition, and it is practical real Current there may be another division manner, such as multiple units or components can be combined or can be integrated into another system, Or some features can be ignored or not executed.In addition, shown or discussed mutual coupling or direct-coupling or communication Connection can be through some interfaces, the indirect coupling or communication connection of device or unit can be electrically mechanical or other shapes Formula is realized.

The unit that the separative unit illustrates may or may not be physically separated.It is shown as unit Component may or may not be physical unit, and a position can be located at, or multiple nets can be distributed to On network unit.Some or all of unit therein can be selected to achieve the object of the present invention according to the actual needs.

In addition, each functional unit discussed in the present invention can be integrated in one processing unit, or can be Each unit physically exists alone, and two or more units can be integrated in a unit.Above-mentioned integrated unit Both it can also be realized by SFU software functional unit by hardware realization.

If integrated unit is implemented as SFU software functional unit, and as independent product by when selling or using, can To be stored in computer-readable storage medium.Based on this understanding, the technical solution or the skill of essence of the invention The all or part of art scheme can be used as software product to implement.Computer software product can be stored in storage medium In, and may include some instructions, to calculate equipment (for example, personal computer, server or network equipment etc.) or Processor executes all or part of method of the present invention.Storage medium may include that can store owning for program code The medium of type, for example, USB flash memory disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), arbitrary access are deposited Reservoir (Random Access Memory, RAM), disk or CD etc..

The foregoing is merely some illustrative embodiments of the invention, are not intended to limit the scope of the present invention.To this Invent any equivalent structure or equivalent flow shift for being made or the present invention other related technical areas it is any directly or It uses, should all be included within the scope of the present invention indirectly.

Claims

1. a kind of reference signal configuration method characterized by comprising

Central location determines whether to open or close the distribution unit in the overlay area of the central location；Wherein, in described Centre unit connects and controls multiple distribution units；High level in the central location carrying air interface protocols, and institute State the low layer of distribution unit carrying air interface protocols；And

The central location sends reference signal configuration message to the distribution unit, so that the distribution unit responds the ginseng It examines signal configuration message and sends reference signal from stopping and switch to the corresponding reference signal of transmission, or stop sending reference letter Number.

2. stopping sending reference signal the method according to claim 1, wherein being used to indicate the distribution unit The reference signal configuration message include: to stop sending reference signal to enter close pattern for controlling the distribution unit Cell.

3. the method according to claim 1, wherein being used to indicate the distribution unit sends corresponding reference letter Number the reference signal configuration message include relevant reference signal parameter；The relevant reference signal parameter includes sending At least one of period, sub-frame offset and resource unit pattern；Wherein, the sub-frame offset is for indicating in the hair Which subframe in the period is sent to send corresponding reference signal, and the resource unit pattern is for indicating the corresponding reference Mapping mode of the signal to the resource unit.

4. according to the method described in claim 3, it is characterized in that, the resource unit pattern is CSI-RS class or CRS class.

5. method according to any of claims 1-4, which is characterized in that determine whether to open or close the center Distribution unit in the overlay area of unit includes:

The central location selects at least one to access distribution unit in the overlay area of the central location；And

Sending the reference signal configuration message to the distribution unit includes:

The reference signal configuration message is sent at least one access distribution unit described in close pattern, so that described At least one access distribution unit starts to send corresponding reference signal.

6. according to the method described in claim 5, it is characterized in that, the reference signal configuration message package enclosed tool frame shifting amount； The sub-frame offset is used mainly for all distribution units of currently transmitted reference signal.

7. according to the method described in claim 5, it is characterized in that, selecting institute in the overlay area of the central location Stating at least one access distribution unit includes:

According at least to the distribution of the distribution unit, at least one described access distribution unit is selected in the overlay area, It is covered so that the transmission range of the reference signal of at least one access distribution unit can cover the described of the central location Cover area.

8. the method according to the description of claim 7 is characterized in that selecting institute in the overlay area of the central location State at least one access distribution unit further include:

Only at least one described access distribution unit of selection in the distribution unit (distribution unit in close pattern) of closing.

9. according to the method described in claim 5, it is characterized in that, selecting institute in the overlay area of the central location State at least one access distribution unit further include:

It responds the distribution unit access request from user equipment and selects at least one described access in the overlay area Distribution unit.

10. according to the method described in claim 9, it is characterized by further comprising:

The list and relevant reference signal parameter of at least one access distribution unit are sent to the user equipment.

11. method according to any of claims 1-4, which is characterized in that determine whether to open or close in described Entreat unit the overlay area in distribution unit include:

According to the information of the first distribution unit determine whether to open the distribution list in the overlay area according to the central location Member；Wherein, first distribution unit is initial connection in the distribution unit of at least one user equipment；And

Distribution unit into the overlay area sends reference signal configuration message

The central location sends the first reference signal configuration message to first distribution unit, and is distributed to described first The distribution unit that at least one in the adjacent distribution unit of unit is closed sends the second reference signal configuration message.

12. according to the method for claim 11, which is characterized in that the first reference signal configuration message and described second Reference signal configuration message includes sub-frame offset；Wherein, the son for including in the first reference signal configuration message The sub-frame offset that frame shifting amount uses before connecting at least one described user equipment with first distribution unit is identical, and institute It states the sub-frame offset for including in the second reference signal configuration message and includes in the first reference signal configuration message The sub-frame offset it is identical.

13. method according to any of claims 1-4, which is characterized in that determine whether to open or close in described Entreat unit the overlay area in distribution unit include:

The central location determines whether to open the overlay area according to the user equipment handover information in the overlay area Interior distribution unit, wherein including at least the source distribution unit connecting before switching with the user equipment in the handover information The information of the target distribution unit of the user equipment connection after information and switching；And

The distribution unit into the overlay area sends reference signal configuration message

When not connecting with any user equipment after source distribution unit switching, the central location is to the source distribution unit It sends candidate reference signals and configures message；And when not connect with any user equipment before target distribution unit switching, The central location sends service reference signal to the target distribution unit and configures message.

14. method according to claim 13, which is characterized in that the candidate reference signals configuration message and the clothes Reference signal configuration message of being engaged in includes sub-frame offset, and the subframe for including in the candidate reference signals configuration message is inclined Shifting amount and the sub-frame offset and the preceding used sub-frame offset of switching in service reference signal configuration message It is identical.

15. method according to any of claims 1-4, which is characterized in that determine whether to open or close in described Entreat unit the overlay area in distribution unit include:

The central location determines whether the distribution list closed in the overlay area according to the information of distribution unit to be closed Member, wherein the distribution unit to be closed includes the distribution unit being set off, all adjacent distributions units all in non- All candidate distribution units (that is, the distribution unit for being in candidate pattern) of service mode, the user equipment of all connections all become It is Idle state or all Service Distribution Units for the overlay area for switching to other central locations (that is, point in service mode Cloth unit)；And

The central location sends the reference signal configuration message to the distribution unit to be closed, so that described wait close Distribution unit stop send reference signal with enter close pattern.

16. method according to any of claims 1-4, which is characterized in that central location is dedicated Base-Band Processing Unit, centralized baseband processing unit, centralized radio access network server, Cloud Server, or it is based on cloud framework baseband pool Virtual base station；Distribution unit is transfer point, transmitting-receiving point or remote radio head.

17. a kind of reference signal configuration method characterized by comprising

Distribution unit receives the reference signal configuration message from central location, wherein the central location is connected and controlled multiple The distribution unit；High level in the central location carrying air interface protocols, and distribution unit carrying connects in the air The low layer of mouth protocol stack；And

The distribution unit respond the reference signal configuration message and from stop sending reference signal switch to send it is corresponding Reference signal, or stop sending reference signal.

18. according to the method for claim 17, which is characterized in that be used to indicate the distribution unit and stop sending with reference to letter Number the reference signal configuration message include: to stop sending reference signal for controlling the distribution unit closing mould to enter The cell of formula.

19. according to the method for claim 17, which is characterized in that be used to indicate the distribution unit and send corresponding reference The reference signal configuration message of signal includes relevant reference signal parameter；The relevant reference signal parameter includes hair Send at least one of period, sub-frame offset and resource unit pattern；Wherein, the sub-frame offset is for indicating described Which subframe in sending cycle sends corresponding reference signal, and the resource unit pattern is for indicating the corresponding ginseng Examine signal to the resource unit mapping mode.

20. according to the method for claim 19, which is characterized in that

The resource unit pattern is CSI-RS class or CRS class.

21. method described in any one of 7-20 according to claim 1, which is characterized in that further include:

The distribution unit sends the list and relevant reference signal parameter of distribution unit to be measured to user equipment, wherein institute The list for stating distribution unit to be measured includes access distribution unit or the distribution unit adjacent with the distribution unit.

22. a kind of central location characterized by comprising

Determining module is used to determine whether to open or close the distribution unit in the overlay area of the central location, wherein institute Central location is stated to connect and control multiple distribution units；High level in the central location carrying air interface protocols, And the low layer of the distribution unit carrying air interface protocols；And

Sending module, for sending reference signal configuration message to the distribution unit, so that described in distribution unit response Reference signal configuration message and send corresponding reference signal from stopping sending reference signal switching to, or stop sending with reference to letter Number.

23. central location according to claim 22, which is characterized in that the determining module is used in the central location The overlay area in selection at least one access distribution unit；And

The sending module is used to send the reference signal at least one access distribution unit described in close pattern Message is configured, so that at least one described access distribution unit starts to send corresponding reference signal.

24. central location according to claim 22, which is characterized in that the determining module is used for single according to the first distribution The information of member determines whether to open the distribution unit in the overlay area；Wherein, first distribution unit is initial connection In the distribution unit of at least one user equipment；And

The sending module is used to send the first reference signal configuration message to first distribution unit, and to described first The distribution unit that at least one in the adjacent distribution unit of distribution unit is closed sends the second reference signal configuration message.

25. central location according to claim 22, which is characterized in that the determining module is used for according to the area of coverage User equipment handover information in domain determine whether open distribution unit, wherein in the handover information include at least switching before with The letter of the target distribution unit of the user equipment connection after the information and switching of the source distribution unit of the user equipment connection Breath；

When the sending module is used to after source distribution unit switching not connect with any user equipment, to the source distribution Unit sends candidate reference signals and configures message；And it is not connect with any user equipment before target distribution unit switching When, service reference signal, which is sent, to the target distribution unit configures message.

26. central location according to claim 22, which is characterized in that the determining module is used for according to point to be closed The information of cloth unit determines whether the distribution unit closed in the overlay area, wherein the distribution unit to be closed includes Candidate distribution unit of the distribution unit, all adjacent distributions units being set off all in non-serving mode, all connections User equipment all become Idle state or switch to the Service Distribution Unit of the overlay area of other central locations；And the hair Send module for sending the reference signal configuration message to the distribution unit to be closed, so that the distribution to be closed Unit stops sending reference signal to enter close pattern.

27. a kind of distribution unit characterized by comprising

Receiving module, for receiving the reference signal configuration message from central location, wherein the central location is connected and controlled Make multiple distribution units；High level in the central location carrying air interface protocols, and the distribution unit carries The low layer of air interface protocols；And

Respond module, for respond the reference signal configuration message and from stop sending reference signal switch to send it is corresponding Reference signal, or stop sending reference signal.

28. distribution unit according to claim 27, which is characterized in that be used to indicate the distribution unit and stop sending ginseng The reference signal configuration message for examining signal includes: to stop sending reference signal to enter pass for controlling the distribution unit The cell of close pattern.

29. distribution unit according to claim 27, which is characterized in that it is corresponding to be used to indicate the distribution unit transmission The reference signal configuration message of reference signal includes relevant reference signal parameter；The relevant reference signal parameter packet Include at least one of sending cycle, sub-frame offset and resource unit pattern；Wherein, the sub-frame offset is for indicating Which subframe in the sending cycle sends corresponding reference signal, and the resource unit pattern is for indicating the correspondence Reference signal to the resource unit mapping mode.

30. distribution unit according to claim 29, which is characterized in that the resource unit pattern be CSI-RS class or CRS class.

31. the distribution unit according to any one of claim 27-30, which is characterized in that further include:

Sending module, for sending the list and relevant reference signal parameter of distribution unit to be measured to user equipment, wherein The list of the distribution unit to be measured includes access distribution unit or the distribution unit adjacent with the distribution unit.

32. a kind of central location, which is characterized in that including processor and the transceiver being connected to the processor；The processing Device is used for:

Determine whether to open or close the distribution unit in the overlay area of the central location；And

Reference signal configuration message is sent to the distribution unit by the transceiver, so that described in distribution unit response Reference signal configuration message and send corresponding reference signal from stopping sending reference signal switching to, or stop sending with reference to letter Number；

Wherein, the central location connects and controls multiple distribution units；The central location carries air interface protocol High level in stack, and the low layer of distribution unit carrying air interface protocols.

33. central location according to claim 32, which is characterized in that be used to indicate the distribution unit and stop sending ginseng The reference signal configuration message for examining signal includes: to stop sending reference signal to enter pass for controlling the distribution unit The cell of close pattern.

34. central location according to claim 32, which is characterized in that it is corresponding to be used to indicate the distribution unit transmission The reference signal configuration message of reference signal includes relevant reference signal parameter；The relevant reference signal parameter packet Include at least one of sending cycle, sub-frame offset and resource unit pattern；Wherein, the sub-frame offset is for indicating Which subframe in the sending cycle sends corresponding reference signal, and the resource unit pattern is for indicating the correspondence Reference signal to the resource unit mapping mode.

35. central location according to claim 34, which is characterized in that the resource unit pattern be CSI-RS class or CRS class.

36. the central location according to any one of claim 32-35, which is characterized in that the processor is used for: in institute It states and selects at least one access distribution unit in the overlay area of central location；And by the transceiver in pass At least one described access distribution unit of close pattern sends the reference signal configuration message, so that at least one described access Distribution unit starts to send corresponding reference signal.

37. central location according to claim 36, which is characterized in that the reference signal configuration message package enclosed tool frame is inclined Shifting amount；The sub-frame offset is used mainly for all distribution units of currently transmitted reference signal.

38. central location according to claim 36, which is characterized in that the processor is used for: according at least to described point The distribution of cloth unit selects at least one described access distribution unit in the overlay area so that it is described at least one connect The transmission range for entering the reference signal of distribution unit can cover the overlay area of the central location.

39. central location according to claim 36, which is characterized in that the processor is used for: only in the distribution of closing At least one described access distribution unit is selected in unit.

40. central location according to claim 36, which is characterized in that the processor is used for: response is set from user Standby distribution unit access request and at least one described access distribution unit is selected in the overlay area.

41. central location according to claim 40, which is characterized in that the processor is also used to: passing through the transmitting-receiving Device sends the list and relevant reference signal parameter of at least one access distribution unit to the user equipment.

42. the central location according to any one of claim 32-35, which is characterized in that the processor is used for:

Determined whether to open the distribution unit in the overlay area according to the information of the first distribution unit；Wherein, described first Distribution unit is initial connection in the distribution unit of at least one user equipment；And

By the transceiver to first distribution unit send the first reference signal configuration message, and to described first point The distribution unit that at least one in the adjacent distribution unit of cloth unit is closed sends the second reference signal configuration message.

43. central location according to claim 42, which is characterized in that the first reference signal configuration message and described Second reference signal configuration message includes sub-frame offset；Wherein, the institute for including in the first reference signal configuration message It is identical to state the sub-frame offset used before sub-frame offset connects at least one described user equipment with first distribution unit, And in the sub-frame offset in the second reference signal configuration message including and the first reference signal configuration message The sub-frame offset for including is identical.

44. the central location according to any one of claim 32-35, which is characterized in that the processor is used for:

Determine whether to open the distribution unit in the overlay area according to the user equipment handover information in the overlay area, Wherein after the information and switching including the source distribution unit being connect before at least switching with the user equipment in the handover information The information of the target distribution unit of the user equipment connection；And

When not connect with any user equipment after source distribution unit switching, by the transceiver to the source distribution list Member sends candidate reference signals and configures message, and when being in candidate pattern before the target distribution unit switches, to the mesh It marks distribution unit and sends service reference signal configuration message.

45. central location according to claim 44, which is characterized in that candidate reference signals configuration message and described It includes sub-frame offset that service reference signal, which configures message, the subframe for including in the candidate reference signals configuration message Offset and the sub-frame offset and the preceding used sub-frame offset of switching in service reference signal configuration message It measures identical.

46. the central location according to any one of claim 32-35, which is characterized in that the processor is used for:

The distribution unit closed in the overlay area is determined whether according to the information of distribution unit to be closed, wherein it is described to The distribution unit of closing include the distribution unit being set off, all adjacent distributions units all in non-serving mode candidate Distribution unit, all connections user equipment all become Idle state or switch to the service point of the overlay area of other central locations Cloth unit；And

The reference signal configuration message is sent to the distribution unit to be closed by the transceiver, so that described wait close The distribution unit closed stops sending reference signal to enter close pattern.

47. the method according to any one of claim 32-35, which is characterized in that central location is at dedicated base band Unit, centralized baseband processing unit, centralized radio access network server, Cloud Server are managed, or is based on cloud framework base band The virtual base station in pond；Distribution unit is transfer point, transmitting-receiving point or remote radio head.

48. a kind of distribution unit characterized by comprising processor and the transceiver being connected to the processor；The processing Device is used for:

The reference signal configuration message from central location is received by the transceiver；And

It responds the reference signal configuration message and switches to the corresponding reference signal of transmission from transmission reference signal is stopped, or stop Only send reference signal；

Wherein the central location connects and controls multiple distribution units；The central location carries air interface protocols In high level, and the distribution unit carrying air interface protocols low layer.

49. distribution unit according to claim 48, which is characterized in that be used to indicate the distribution unit and stop sending ginseng The reference signal configuration message for examining signal includes: to stop sending reference signal to enter pass for controlling the distribution unit The cell of close pattern.

50. distribution unit according to claim 48, which is characterized in that it is corresponding to be used to indicate the distribution unit transmission The reference signal configuration message of reference signal includes relevant reference signal parameter；The relevant reference signal parameter packet Include at least one of sending cycle, sub-frame offset and resource unit pattern；Wherein, the sub-frame offset is for indicating Which subframe in the sending cycle sends corresponding reference signal, and the resource unit pattern is for indicating the correspondence Reference signal to the resource unit mapping mode.

51. distribution unit according to claim 50, which is characterized in that the resource unit pattern be CSI-RS class or CRS class.

52. the distribution unit according to any one of claim 48-51, which is characterized in that the processor is also used to: to User equipment sends the list and relevant reference signal parameter of distribution unit to be measured, wherein the distribution unit to be measured List includes access distribution unit or the distribution unit adjacent with the distribution unit.