CN109565905A

CN109565905A - Control plane and user plane wireless communication method and device

Info

Publication number: CN109565905A
Application number: CN201780031870.7A
Authority: CN
Inventors: 周建铭
Original assignee: Hongying Innovative Intelligent Finance Co
Current assignee: Hongying Innovative Intelligent Finance Co
Priority date: 2016-05-23
Filing date: 2017-05-23
Publication date: 2019-04-02
Anticipated expiration: 2037-05-23
Also published as: EP3466194A4; EP3466194A1; CN109565905B; WO2017202300A1

Abstract

This application discloses the control planes and user-plane transmissions method in a kind of customization C-RAN.The method includes using the first wave beam in radio resource to provide control plane (control plane, CP) signaling, and user plane (user plane is provided using the second wave beam in radio resource based on CP signaling, UP) content, wherein the first wave beam provides access covering range more broader than the second wave beam.Radio resource is authorized spectrum band or unauthorized frequency range.First wave beam and the second wave beam are millimeter wave beams.First wave beam has omni-beam pattern.Second wave beam has directional beam pattern.

Description

Control plane and user plane wireless communication method and device

Cross reference to related applications

It is entitled " for the control plane of mobile communication system and user this application involves what is submitted on May 23rd, 2016 The method and apparatus of plane signaling ", application No. is 62/339,967, invented by Chie-Ming Chou, act on behalf of Reference Number US59898 The U.S. Provisional Patent Application of (hereinafter referred to as " US59898 application ").The disclosure of US59898 application is by quoting completely simultaneously Enter the application.

Technical field

The present invention relates to plane and user plane biography are controlled in wireless communication field more particularly to a kind of wireless communication system Transmission method and device.

Background technique

Third generation partner program (3GPP) is being developed for next generation wireless communication network (for example, new radio (new radio, NR)) framework and agreement.NR network makes great efforts to provide sub- Millisecond delay and at least 1Gbps (such as 10Gbps) Downlink speed, and support millions of or even billions of connections.In contrast, forth generation (4G) wireless network, such as Traditional long term evolution (long-term-evolution, LTE) network, can be supported under most 150Mbps by single carrier Line link speed.Therefore, the power system capacity of NR network can be 1000 times of current 4G wireless network capacitance.NR is especially with milli The higher frequency of radio-frequency spectrum in metric wave range (for example, 1 to 300GHz) and intensive cell deployment are (for example, use Microcell, Base Band Unit, the first-class technology of remote radio) to meet these technical requirements.

Cloud radio access network (cloud radio access network, C-RAN) can provide many cells Centralized Base-Band Processing.C-RAN carries out coordinating between these small cells and the ability of aggregate resources is wireless network architecture Provide flexibility and efficiency.For example, C-RAN can provide many benefits, such as (1) is virtualized suitable for network function (NFV)；(2) cost (such as Capital expenditure, operation expenditure) is reduced；(3) utilization and virtualization of radio resource, provides high system System capacity and peak user equipment (user equipment, UE) handling capacity；4) flexible adaptation different application and requirement.

C-RAN also promises to undertake that providing efficient transmission for next generation cellular network coordinates and network function virtualization.Described Under C-RAN framework, Base Band Unit (baseband unit, BBU) can optimize the remote radio head (remote for connection Radio headers, RRH) provided for radio resources management (radio resource management, RRM), it is various to meet UE requires (for example, high-throughput).Meanwhile also introducing the extensive multiple-input and multiple-output with millimeter wave (mmWave) frequency band (massive multi-input-multi-output, M-MIMO) technology, to provide high data rate.

However, traditional C-RAN often rely on one or more macro evolved node B (evolved node Bs, ENBs) or node B (generation node Bs, gNBs) is generated cooperated with one or more RRH to provide control plane (control plane, CP) signaling and user plane (user plane, UP) content (for example, data) are so as in its area of coverage High-throughput transmission is realized in domain.This cooperation causes network overhead to increase, and needs the complex configurations at the end UE.Therefore, it passes The C-RAN of system may be not suitable for and/or it is expected for such as inexpensive Internet of Things (internet of thing, IoT) equipment, Factory of supplier enterprise and hospital.

Therefore, this field needs a kind of C-RAN of customization, can be in not on-premise network operator (for example, macro eNB) In the case of CP signaling and UP content are provided, and operated for independent and dependent RRH and consistent access mechanism be provided.

Detailed description of the invention

When read in conjunction with the accompanying drawings, it can be best understood in various aspects disclosed in embodiment from the following detailed description Hold.Various features are not drawn on scale, and for clear discussion, can arbitrarily increase or decrease the size of various features.

Fig. 1 is the structural schematic diagram of traditional C-RAN.

Fig. 2A and 2B is the architectural schemes figure of two tradition C-RAN.

Fig. 3 is the schematic diagram of the beam scanning in traditional C-RAN using an embodiment of handoff procedure.

Fig. 4 is the configuration diagram of the customization C-RAN of one embodiment of the invention.

Fig. 5 is the configuration diagram of the mixed-beam forming RRH of one embodiment of the invention.

Fig. 6 is one embodiment of the invention via the mixed-beam forming RRH support CP signaling and UP content transmission in Fig. 5 The schematic diagram of process.

Fig. 7 is a LBT flow chart in the C-RAN framework of customization of one embodiment of the invention.

Fig. 8 is the structural schematic diagram using the customization C-RAN for coordinating LBT process of one embodiment of the invention.

Fig. 9 is the signaling process figure using the customization C-RAN for coordinating LBT process of one embodiment of the invention.

Figure 10 is the configuration diagram of the customization C-RAN using unified LBT process of one embodiment of the invention.

Figure 11 is the signaling process figure of the customization C-RAN using unified LBT process of one embodiment of the invention.

Figure 12 A and 12B are the configuration diagrams of the customization C-RAN using alternately LBT process of one embodiment of the invention.

Figure 13 is the signaling process figure of the customization C-RAN using alternately LBT process of one embodiment of the invention.

Specific embodiment

It is described below comprising specific information related with the realization of the application.Attached drawing and its accompanying in the application it is detailed Description is only for better embodiment.Unless otherwise stated, identical or corresponding element in attached drawing can by identical or Corresponding appended drawing reference instruction.In addition, attached drawing in the application and diagram are not usually in proportion, and to be not intended to and correspond to Actual relative size.

Fig. 1 is the schematic diagram of conventional cloud radio access network (cloud radio access network, C-RAN). As shown in Figure 1, traditional C-RAN100 includes (or the sometimes referred to as central location of Base Band Unit (baseband unit, BBU) 102 (central unit, CU), remote radio head (remote radio header, RRH) 104a, 104b and 104c (or sometimes referred to as For distributed unit (distributed unit, DU), user equipment (user equipment, UE) 106a and 106b, and Evolved Packet Core (evolved packet core, EPC) 108.In one embodiment, C-RAN 100 is long term evolution (long-term-evolution, LTE) EPC network.In another embodiment, C-RAN 100 is next-generation core (Next Generation Core, NG-C) network.

In C-RAN 100, BBU 102 manages resource pool, and is used as data gateway connection EPC 108 and each RRH 104a, 104b and 104c.BBU 102 passes through at least one of forward pass interface and RRH 104a, 104b and 104c and communicates.Example Such as, forward pass interface can be responsible for the transmission of the I/Q data between BBU 102 and target RRH.Several transport protocols are (for example, common Public wireless electrical interface (common public radio interface, CPRI), IEEE 1904.3) forward pass can be promoted Reliable transmission in transportation network.Moreover, RRH 104a, 104b and 104c are distributed across various geographical positions in C-RAN 100 It sets to be wirelessly electrically accessed for UE (such as UE 106a and 106b) offer.

In Fig. 1, C-RAN 100 can provide flexible function separation and cooperative transmission.For example, RRH 104a and 104b Steady coordinating transmissions can be provided to UE 106a using Combined Treatment.For transmission to UE 106a, physical layer (physical layer, PHY) and media access control (media access control, MAC) function can be by RRH104a and 104b processing (for example, at which terminate), and wireless spread-spectrum technology (radio link control, RLC) and divide Group data convergence agreement (packet data convergence protocol, PDCP) function is handled by BBU 102, to reduce The access latency of UE 106a.In addition, UE 106b can run delay-tolerant service, and only PHY function is by RRH 104c processing (for example, being terminated at RRH 104c), and MAC, RLC and PDCP function are handled by BBU 102, to simplify RRH The calculating work of 104c.

Fig. 2A and 2B shows the schematic diagram of two kinds of tradition C-RAN architectural schemes.As shown in Figure 2 A, C-RAN 200A includes BBU 202, RRH 204a, 204b and 204c, macro eNB 210 and UE 206.In scene 1, C-RAN 200A relies on macro evolution Type node B (evolved node B, eNB) 210 cooperates as operator and RRH 204a, 204b with 204c.Macro 210 quilt of eNB Authorization (licensed) frequency band for distributing and assigning transmission is set, and BBUs is connected to CN.Macro eNB 210 is in authorization frequency Operation, and RRH 204a are taken, at least one of 204b and 204c are operated in unlicensed band.It is unauthorized (unlicensed) frequency band be with multiple sending entity/radio access technologies (radio access technologies, RAT frequency spectrum is shared by)/operator, wherein the shared constraint by certain fairness standards.In fig. 2, entire C-RAN 200A The overlapped coverage of coverage area and macro eNB 210.Under scene 1, plane (control plane, CP) is controlled by macro eNB 210 management.Therefore, UE 206 needs associated with macro eNB 210 and assists access (license-assisted using authorization Access, LAA) deactivate user plane (user plane, the UP) data for coming from and/or arriving RRH 204a, 204b and 204c Transmission.For example, authorized frequency bands, which can be used, in macro eNB 210 provides CP signaling to UE 206, and UP content transmission is by using non-award The RRH 204b for weighing frequency band is provided.

BBU 202 manages unauthorized frequency band pond.BBU 202 may be coupled to core network and (be not known in Fig. 2A and show Out), such as EPC network.RRH 204a, 204b and 204c need to be implemented listem-before-talk (listen-before-talk, LBT) mistake Journey is to occupy unauthorized Internet resources (for example, unauthorized frequency band) before the transmission of any data.By executing LBT mistake Journey, RRH 204b can be to avoid the transmission collisions with other entities in unlicensed band.But in order to guarantee all entities pair The fairness that unauthorized frequency range uses also is forbidden even if the entity initially passes through LBT program and obtains unauthorized frequency range Single entity is continuously transmitted using unauthorized frequency range.Moreover, RRH 204a, 204b and 204c can be each under scene 1 It is more than predetermined threshold to prevent transimission power from their transimission power is limited.

As shown in Figure 2 B, in scene 2, C-RAN 200B includes BBU 202, RRH204a, 204b and 204c and UE 206.In scene 2, RRH 204a, 204b and 204c can be operated simultaneously in each comfortable authorized frequency bands and unlicensed band.? In scene 2, CP signaling is only sent by authorized frequency bands, and UP content can be sent by authorization or unlicensed band.UE 206 It is associated with RRH 204a.When UE 206 needs high data rate transfer, if it is desired, can be enabled in unlicensed band LAA.Although UE 206 is not associated with any macro eNB (for example, single connection), and C-RAN 200B is needed in scene 2 Increase the complexity of RRH, it means that RRH (for example, RRH 204a, 204b and 204c) need support CP transmission have awarding Weigh the operational capacity of frequency range.RRH 204a, 204b and 204c can operate dry to avoid minizone on different authorized frequency bands It disturbs.Different authorized frequency bands can be configured by BBU 202.That is, BBU 202 manages authorization and unlicensed band pond in scene 2, This leads to increased network overhead.

The benefit of traditional C-RAN may attract enterprise, such as factory and hospital, dispose C-RAN for personal use.Example Such as, industry 4.0 describes a kind of intelligent plant scene, wherein intelligence (automobile is connected with Ethernet) equipment will in the factory extensively Distribution is to improve manufacture course of products.But tradition C-RAN architectural schemes described in Fig. 2A and 2B are non-independent architectures, this Operator and their effort is needed to carry out the authorization frequency spectrum of management framework.This framework may be expensive and surdimensionnement, this Be not suitable for the particular demands of certain enterprises.For example, most of equipment in enterprise are opposing stationary or movement is relatively slow, this meaning To mobile management control demand it is not high.In addition, most of device-specifics are transmitted in data, it means that Circuit Switching Network The demand of network is not high.In addition, operator may collect authorization expense to the authorized spectrum band for using CP to transmit.In addition, when RRH passes through When using M-MIMO technology using mmWave (millimeter wave) frequency spectrum, it is infeasible for providing CP signaling on a beam forming direction (for example, CP signaling is broadcasted by the authorized frequency bands on a specific fixed-direction).

Fig. 3 is shown utilizes the schematic diagram of an embodiment beam scanning of handoff procedure in traditional C-RAN.In Fig. 3, C- RAN 300 includes RRH 304 and UE 306.RRH304 provides multiple narrow beams in identical or different frequency band, wherein each Narrow beam provides CP signaling and UP content.When UE 306 is being moved and is switched to another wave beam from a beam forming direction When shaping direction, RRH 304 needs to initiate wave beam management process and obtains CP signaling letter appropriate to change the association of UE 306 Breath.Wave beam management process can individually be completed by BBU (being not explicitly shown in Fig. 3), only individually be completed by RRH 304, Huo Zheyou Cooperation between BBU and RRH 304 is completed.But wave beam management process can lead to the substantial increase of network overhead, to reduce The performance of system.In addition, if wherein beam forming direction changes automatically as UE 306 is mobile using wave beam tracking Become, then will introduce high computation complexity (for example, it is desired to track the migration of UE 306 and beam forming weighting parameters needs immediately Reconfigure), this can also reduce power system capacity (for example, a wave beam is only served in a UE, because multiple UE may have not Same track).

In addition, include the CP signaling information in two or more narrow beams may include at least partly (if It is not identical) information.If all narrow beams operate in unlicensed band, redundancy is sent using unlicensed spectrum CP signaling information may waste frequency spectrum resource.In addition, if RRH 304 is operated in unlicensed band, then RRH304 needs It is that each wave beam executes LBT before sending each UE for CP signaling information.When two or more wave beams can be simultaneously When executing LBT to identical unlicensed band, there is another problem.Such as, it is intended to send two or two of CP signaling information A above wave beam, is each performed simultaneously LBT, they can test identical unlicensed band (i.e. channel) simultaneously, and complete Portion determines that channel is clear.But if all wave beams determine to use the channel, the CP signaling letter from these wave beams Breath will conflict with each other.

Fig. 4 is the schematic diagram of the customization C-RAN framework of one preferred embodiment of the application.In Fig. 4, the C-RAN of customization 400 include BBU 402, RRH 404a, 404b and 404c and UE 406.It is worth noting that, BBU 402 may be coupled directly to Ethernet 412 supports " plug and play ", the core network without being connected to operator.

In one embodiment, RRH 404a, 404b and 404c are operated in unlicensed band, are provided with servicing UEs to it CP signaling and UP content.Since RRH 404a, 404b and 404c are operated under unlicensed band, therefore do not need using authorization frequency The expense of band.Moreover, because macro eNB does not work in this customization C-RAN framework, therefore can be operated to avoid heterogeneous network. The cost of the present embodiment customization C-RAN deployment can reduce, and the operation of UE can simplify.In another embodiment, when When enterprise owners selection rents from operator or borrows authorized frequency bands, customization C-RAN 400 can be operated on authorized frequency bands. For example, the CP wave beam in the subband of authorization radio-frequency spectrum, which can be used, in RRH 404a provides CP signaling to UE 406.RRH 404a can also use one or more UP wave beams in other subbands of authorization radio-frequency spectrum to provide UP content to UE 406. In another embodiment, RRH 404a can use one or more UP wave beam to UE in the independent time slot with same sub-band 406 provide UP content.

M-MIMO technology, the C- of customization are adapted to by 400 infrastructure of C-RAN of customization and using mmWave frequency spectrum RAN 400 can be used for various scenes, support a large amount of connections and ubiquitous covering with lower cost.In the present embodiment, RRH 404a provides CP signaling to UE 406 using the CP wave beam in the subband of unlicensed-radio frequency spectrum.RRH 404a is also used One or more UP wave beams in other subbands of unlicensed-radio frequency spectrum provide UP content to UE 406.

As discussed below with reference to Fig. 5, for providing the CP wave beam of CP signaling than for providing the UP of UP content to UE Wave beam is wider.That is, CP wave beam provides access coverage area more broader than UP wave beam.In the present embodiment, RRH 404a The CP wave beam of (for example, broadcast) with omnidirectional (omni-directional) beam pattern can be provided, and provide have compared with One or more UP wave beams of narrow orientation (directional) beam pattern are to send UE for UP content (for example, data) 406.In another embodiment, RRH 404a can provide one or more CP wave beams with wider directional beam pattern, and And one or more UP wave beams with narrower directional beam pattern are provided to send UP content to UE 406 respectively, wherein each Broader directional beam pattern can be with several narrow directional beam pattern overlappings.That is, CP wave beam is provided than UP wave beam Broader access covering range.

In the case where authorizing subband to provide CP signaling information, RRH 404a, 404b and 404c can be each by using Private resource (for example, not executing LBT) broadcasts their corresponding CP signalings.RRH 404a, 404b and 404c can be picked up by oneself respectively Function is shaped for mixed-beam to solve the problems, such as the excess overhead of UE migration.For example, every in RRH 404a, 404b and 404c One a part of antenna that can be used in its aerial array forms the CP wave beam with omni-beam pattern, coverage area Coverage area including all UP wave beams with directional beam pattern, wherein directional beam pattern is by other in aerial array Antenna generates.RRH 404a, 404b and 404c can each divide from total available bandwidth (for example, 20MHz from 160MHz) CP working band with a specific authorization subband as omni-beam pattern.Due to the CP wave beam with omni-beam pattern It is anchored on special delegated authority frequency band, UP wave beam can be by beam forming come handover operation subband, bandwidth and direction.For example, UE can To establish RRC by the omni-beam in authorization CP operator band with RRH and connect, and RRH can be by using authorizing or non- UP directional beam in authorization subband to send data to UE.

In the case where unauthorized subband provides CP signaling information, RRH 404a, 404b and 404c each can be used non- The omni-beam in CP operator band is authorized to provide (for example, broadcast) its corresponding CP signaling.RRH 404a, 404b and 404c Each of (for example, broadcast) their own CP wave beam can be provided in its specific unauthorized subband before execute LBT.Mixed-beam forming function can be each provided in RRH 404a, 404b and 404c, to solve the excess overhead of UE migration Problem.For example, a part of antenna in its aerial array can be used to be formed in each of RRH404a, 404b and 404c CP wave beam with omni-beam pattern, coverage area include the covering model with all UP wave beams of directional beam pattern It encloses.Beam pattern is generated by other antennas in aerial array.RRH 404a, 404b and 404c each can be from total available bandwidths Specific CP operator band of the unauthorized subband as omni-beam pattern is distributed in (for example, 20MHz from 160MHz).By Be anchored on specific unauthorized subband in the CP wave beam with omni-beam pattern, thus UP wave beam can by wave beam at Shape comes handover operation subband, bandwidth and direction.For example, UE can pass through the omni-beam and RRH in unauthorized CP operator band RRC connection is established, and RRH can come to send data to UE by using the UP directional beam in unauthorized subband.Another In a embodiment, RRH can send UE for UP data by using the directional beam in authorization subband.

It should be understood that the beam pattern of CP wave beam needs not be omnidirectional.CP wave beam can have beam pattern (example Such as, non-omni-beam pattern), have more wider (for example, having than the beam angle of all UP wave beams in RRH coverage area Broader access covering range) beam angle.In addition, UP content can pass through the difference in the different time-gap in same sub-band UP wave beam is sent to UE 406.

Fig. 5 is the schematic diagram of the mixed-beam forming RRH of the preferred embodiment of the application.As shown in figure 5, RRH 504 Eight wave beams with different beams pattern can be formed.CP signaling (for example, control channel and signaling) is sent out by CP wave beam 516 It send, CP wave beam 516 has the omni-beam figure (cover all 8 vertical grids) of 20MHz bandwidth (for example, such as along trunnion axis It is shown).UP wave beam 518a, 518b, 518c, 518d, 518e, 518f and 518g are by flexible bandwidth allocation in its dedicated direction Upper offer UP content.UP wave beam 518a, 518b, 518c, 518d, 518e, 518f and 518g can respectively have the bandwidth of their own, For example, the UL/DL based on its special services UE requires to be adjusted.For example, bandwidth of the UP wave beam 518a with 280MHz, and UP Wave beam 518b has the bandwidth of 20MHz.Data transmission speed needed for the bandwidth of each UP wave beam can depend on the UE serviced Rate.It is shaped it should be noted that a part of CP operator band can also be allocated for data transmission without directional beam Benefit (for example, leading to low message transmission rate).

In the present embodiment, RRH 504 may include aerial array and associated beamforming circuitry, unauthorized CP signaling is provided by CP wave beam 516 in the subband of radio-frequency spectrum.RRH 504 can also use one or more UP wave beam 518a, 518b, 518c, 518d, 518e, 518f and 518g provide UP content by other subbands of unlicensed-radio frequency spectrum.

In Fig. 5, CP wave beam 516 has an omni-beam pattern, and UP wave beam 518a, 518b, 518c, 518d, 518e, Each of 518f and 518g have directional beam pattern.As shown in figure 5, the beam pattern ratio UP wave beam of CP wave beam 516 Each beam pattern of 518a, 518b, 518c, 518d, 518e, 518f and 518g are wide.That is, CP wave beam 516 provides ratio The broader access coverage area of UP wave beam 518a, 518b, 518c, 518d, 518e, 518f and 518g.

CP wave beam 516 includes all necessary informations of all UP wave beams in 504 coverage area of RRH (for example, synchronous letter It enables, system information, reference signaling and channel configuration).In this way, all UEs in the coverage area of RRH 504 can be based on by CP The CP information that wave beam 516 provides is synchronous with RRH 504, passes through one or more UP wave beam for subsequent UP (for example, DL/UL) The transmission of 518a, 518b, 518c, 518d, 518e, 518f and 518g.That is, UP wave beam 518a, 518b, 518c, 518d, 518e, 518f and 518g all rely on CP wave beam 516 to provide all necessary informations for its subsequent data transmission.

From the perspective of UE, UE may include transceiver circuit, and transceiver circuit is used to be moved to RRH's 504 as UE When coverage area, CP signaling is obtained by CP operator band to execute DL/UL synchronization and establish RRC with RRH 504 and connect.At Function is established after RRC connection, and when needing the transmission of high data, RRH 504 can orient UP wave beam by using one or more (for example, UP wave beam 518a, 518b, 518c, 518d, 518e, 518f and 518g) and relative measurement based on UE are (for example, be based on The position of UE) respective resources carry out schedule data transmission.The transceiver circuit of UE can orient UP wave beam by one or more (for example, UP wave beam 518a, 518b, 518c, 518d, 518e, 518f and 518g) obtains user data.Although in RRH 504 Coverage area in migrated, but due to omnidirectional's CP wave beam 516 cover all UP wave beams from RRH504, UE is still It can receive CP signaling.Therefore, when UE is moved in the coverage area of RRH 504, handoff procedure is not needed.

Fig. 6 is the preferred embodiment of the application via mixed-beam shown in fig. 5 forming RRH support CP signaling and UP The schematic diagram of the signaling procedure of content transmission.As shown in fig. 6, signaling procedure 600 includes step 1 to 9.In step 1, BBU 602, which send CP to RRH 604, configures message.CP configuration message may include CP operator band or the distribution of one or more distribution CP it is operating slotted, and describe CP wave beam (for example, CP wave beam 516 in Fig. 5) omni-beam formed patterns (for example, pass Defeated power, beam-forming weights and phase) parameter.In step 2, after receiving CP configuration message, RRH 604 is based on The CP operator band distributed or the CP distributed it is operating slotted in the parameters of requested omni-beam formed patterns configure At least part of its aerial array.In step 3, after antenna configuration, RRH 604 sends CP configuration response to BBU602 Message, with the state (for example, success or failure) configured to the notice of BBU 602.RRH 604 also can indicate that CP configuration response disappears Failure cause in breath reconfigures so that BBU 602 is executed if necessary.CP reconfigures request and CP reconfigures response Message can pass through open radio interface (openradio equipment interface, ORI) or other networks Interface protocol (GPRS Tunnel Protocol control plane data (GTP-C panel data)) is sent.

As shown in fig. 6, in step 4, after successful antenna configuration, RRH 604 is used with omni-beam pattern CP wave beam (for example, CP wave beam 516 in Fig. 5) provide (for example, passing through broadcast) CP signaling.In steps of 5,606 (example of UE Such as, coverage area that is idle or entering RRH 604) available CP signaling and based on include in CP wave beam information (for example, Synchronous signaling, system information, reference signaling and channel configuration) execute DL/UL it is synchronous.In step 6, once complete and RRH 604 synchronization, UE 606 just execute RRC connection by RRH 604 and establish (for example, registration/authorization, NAS negotiates).UE 606 can It is established with continuing tradition.For example, transfer function can be located in BBU 602 to handle and establish (for example, because the C-RAN of customization It is not connect with EPC and tradition foundation is transferred to IP is grouped and is forwarded directly to Ethernet).

As further shown in Figure 6, in step 7, when UE 606 requests high data rate transfer, RRH 604 can be with It executes directional beam forming (for example, weight appropriate is applied by the measurement based on UE606) and configures and send M-MIMO wave Beam shaping.M-MIMO beam forming configuration request message may include the frequency band of distribution, the time slot of distribution and be used to form orientation The opposite M-MIMO parameter of UP wave beam.In step 8, after receiving M-MIMO beam forming configuration request message, UE 606 can use transmission mode, for example, passing through the additional RF/ antenna of gap activation based on the subband and/or distribution that are distributed Module.Then, UE 606 replied by using M-MIMO beam forming configuration response message confirmation (acknowledgement, ) or non-acknowledgement (non-acknowledgement, NACK) message ACK.In step 9, when RRH 604 receives M- from UE606 When MIMO beam forming configuration response message (for example, ACK), RRH604 can be on the subband distributed or the time slot distributed It dispatches data and forms orientation UP wave beam, send UE 606 for UP content (for example, data).

It can be applied in authorization or unauthorized subband according to the signaling procedure 600 under the customization C-RAN of the present embodiment Send CP signaling and UP content.It should be noted that in order to use unauthorized subband to send CP signaling and UP content, RRH 604 It may need to execute LBT before sending CP signaling to UE 606 and before sending UP content to UE 606.

Fig. 7 is the schematic diagram of the LBT process in the customization C-RAN framework of the preferred embodiment of the application.In this implementation It, can be with when the RRH under the customization C-RAN of the application attempts to send CP signaling using unauthorized subband and/or when UP content in example Execute LBT process 700.LBT process 700 require RRH execute clear channel assessment (CCA) (clear channel assessment, CCA) whether can freely be used with the unauthorized subband of determination.For example, if RRH detects that the energy in unauthorized subband is greater than Energy detection threshold, then RRH can consider that unauthorized subband is occupied (that is, cannot freely use).In LBT process 700, hair Entity (for example, RRH) is sent to generate a random number N in competition window.The length size of competition window by N minimum value and maximum Value is specified.When generating a random number N, sending entity can change the size of competition window.Random number is used during LBT N is come to determine duration of sensing, the duration be the idle time of channel before channel sending entity.

According to the principle of LBT, only one RRH can occupy for CP and/or UP transmission resource (for example, subband or Channel).Based on this principle, if do not coordinated suitably between RRH, multi-beam (in same RRH) or RRH are (same In C-RAN) between conflict or contention for resources may cause system performance decline.For example, if RRH and its adjacent R RH needs Broadcast synchronization signaling simultaneously, and do not have between them both relative to same asset (for example, sub-band or channel) execution LBT Any coordination, then transmission collision can occur.In order to avoid the conflict in RRH between RRH, three LBT are described more fully below Process.

Fig. 8 is the schematic diagram using the customization C-RAN for coordinating LBT process of the preferred embodiment of the application.In Fig. 8 In, the C-RAN 800 of customization includes BBU 802, RRH 804a and RRH 804b.BBU 802 is communicated with RRH 804a and 804b Connection.RRH 804a and 804b can manage individual CP and the UP transmission of themselves.In one exemplary embodiment, exist Using division modulation (frequency division modulation, FDM) to ensure RRH between RRH 804a and 804b 804a and 804b executes its LBT process in different subbands to avoid conflicting between RRH in potential RRH.In another example In property embodiment, time division modulation (time division modulation, TDM) can be used between RRH 804a and 804b With ensure RRH 804a and 804b executed in the respective time slot in same sub-band its LBT process to avoid possible inside and Internal RRH wave beam collision or conflict.

As shown in figure 8, RRH 804a and RRH 804b are respectively that its CP signalling selects unauthorized subband 820 and subband 822.That is, before RRH 804a attempts the UEs offer CP signaling using subband 820 into its coverage area, RRH 804a executes LBT to check whether subband 820 is idle and use.Similarly, it attempts to provide CP letter using subband 822 in RRH 804b Before order, RRH 804b executes LBT to check whether subband 822 can freely use.In the present embodiment, RRH 804a and RRH 804b is performed simultaneously LBT, because they execute their own LBT process for different subbands.By using independent Subband, the C-RAN 800 of customization can rush to avoid the resource between the RRH (for example, RRH 804a and RRH 804b) of connection It is prominent.

In the present embodiment, when subband 822 is greater than predetermined threshold from the RRH 804b energy detected or RSSI, forbid RRH 804a carries out its UP content transmission (as shown in the oblique line in Fig. 8) using subband 822, this indicates RRH 804b currently Use subband 822.Equally, when the energy from RRH 804a or RSSI that subband 820 detects are greater than predetermined threshold, forbid RRH 804b carries out its UP content transmission (as shown in the oblique line in Fig. 8) using subband 820, this indicates RRH 804a currently Use subband 820.

The CP subband of CP wave beam 816a and 816b can be occupied than UP wave beam 818a to 818n (for example, from 20-320MHz) The smaller bandwidth of the bandwidth of the subband of occupancy (for example, about 10MHz).It is worth noting that, UP wave beam 818a to 818n can be with Respectively with the bandwidth of themselves, for example, being required based on the UL/DL of their special services UEs to adjust.For example, UP wave Beam 818a has the bandwidth of 280MHz, and UP wave beam 818m has the bandwidth of 20MHz.The bandwidth of each UP wave beam can depend on Message transmission rate needed for the UE serviced.RRH 804a and 804b can be their own CP transmission application different stage Transimission power.

In the present embodiment, CP wave beam 816a include in the coverage area of RRH 804a for UP wave beam institute it is necessary to Information (for example, synchronous signaling, system information, reference signaling and channel configuration).In this way, the institute in the coverage area of RRH 804a There is UE synchronous with RRH 804a based on the CP information provided by CP wave beam 816a, for passing through one or more UP wave beam The subsequent UP content (for example, DL/UL) of 818a, 818b, 818c, 818d, 818e, 818f and 818g are transmitted.That is, UP wave Beam 818a, 818b, 818c, 818d, 818e, 818f and 818g all rely on CP wave beam 816a to transmit for its subsequent UP data Institute's necessary information is provided.

Similarly, CP wave beam 816b includes all necessary informations of the UP wave beam in RRH 804b coverage area (for example, same Walk signaling, system information, reference signaling, reference signal configuration and channel configuration).In this way, in the coverage area of RRH 804b The CP information that all UE can be provided based on CP wave beam 816b is synchronous with RRH 804b, for passing through one or more UP wave beam The subsequent UP content (for example, DL/UL) of 818h, 818i, 818j, 818k, 818l, 818m and 818n are transmitted.That is, UP wave Beam 818h, 818i, 818j, 818k, 818l, 818m and 818n all rely on CP wave beam 816b to transmit for its subsequent UP data Institute's necessary information is provided.

It should be understood that the beam pattern of CP wave beam 816a and 816b need not be omnidirectional.For example, CP wave beam 816a It can have beam pattern (for example, non-omni-beam pattern), beam pattern has the institute in the coverage area than RRH 804a There are the beam angle of UP wave beam 818a, 818b, 818c, 818d, 818e, 818f and 818g wider (for example, broader access covering Range) beam angle.Similarly, CP wave beam 816b can have beam pattern (for example, non-omni-beam pattern), beam pattern Case has than all UP the wave beam 818h's, 818i, 818j, 818k, 818l, 818m and 818n in the coverage area of RRH804b The beam angle of beam angle wider (for example, broader access covering range).

From the perspective of UE, when UE enters the coverage area of customization CRAN 800, UE will be from RRH 804a and RRH 804b reads CP signaling information.UE can relative position based on UE to RRH 804a and RRH 804b or to RRH 804a and The information that includes in the opposite received signal quality and CP wave beam 816a and 816b of RRH 804b determines to reside in RRH On 804a or RRH 804b.

In the present embodiment, BBU 802 is that the association of CP signalling can be provided between RRH 804a and RRH 804b The central location of tune.Based on from the received CP framework of BBU 802, each of RRH 804a and RRH 804b is known that it The duration that the subband or time slot and implementation procedure needs that its LBT process should be executed cover.RRH 804a and RRH 804b can also configure their own aerial array, and respond BBU.

If the particular sub-band that RRH (for example, RRH 804a or RRH 804b) attempts to send CP signaling information is occupied, RRH can be attempted to switch to different CP subbands (for example, by instruction from BBU 802 or RRH itself), and will switching Message is sent to the UEs of its all connection to notify the change to UEs.Therefore, the UsE of connection can be attempted and new CP Band re-synchronization simultaneously restores CP connection as early as possible.RRH can indicate that UEs realizes the time of re-synchronization before the period expires Section.

Fig. 9 is the signal of the signaling procedure using the customization C-RAN for coordinating LBT process of the preferred embodiment of the application Figure.As shown in figure 9, signaling procedure 900 includes step 1 to 14.In step 1, BBU 902 sends CP configuration to RRH 904 and disappears Breath.CP configuration message may include distribution CP operator band, the CP of distribution it is operating slotted, and description CP wave beam (for example, Fig. 8 In CP wave beam 816a or CP wave beam 816b) omni-beam formed patterns (for example, transimission power, beam-forming weights and phase Position) parameter.In step 2, after receiving CP configuration message, RRH 904 is based on institute in the CP operator band distributed The parameter of the omni-beam formed patterns of request configures at least part of its aerial array.In step 3, in antenna configuration Later, RRH 904 to BBU 902 send CP configuration response message, with to BBU 902 notice configuration state (for example, success or Failure).RRH 904 also can indicate that the failure cause in CP configuration response message, so that BBU 902 is executed again if necessary Configuration.CP reconfigures request and CP reconfigure response message can by open radio interface (ORI) or its His network interface protocols (GPRS Tunnel Protocol control plane data (GTP-C panel data)) are sent.Although only being shown in Fig. 9 One RRH 904 it should be appreciated that in the present embodiment, BBU 902 is can to provide CP between multiple RRH The central location of the coordination of transmission.Based on configuring from the received CP of BBU 902, each RRH (including RRH 904) is known that it Should execute LBT process subband and they need duration for covering.Therefore, RRH can configure their antenna, And respond BBU 902.

In step 4, RRH 904 executes LBT before providing any CP signaling by the CP wave beam in unauthorized subband, To ensure that unauthorized subband (for example, channel) is unoccupied.In steps of 5, after executing LBT, if unauthorized son Band RRH 904 is attempted to send CP signaling and can freely be used (or unoccupied), then RRH 904 can pass through omni-beam Forming antenna configuration provides CP signaling using the CP wave beam with omni-beam pattern.In step 6, UE 906 is (for example, empty Coverage area that is not busy or entering RRH 904) it can obtain CP signaling by transceiver circuit, and based on including in CP wave beam Information executes DL/UL synchronous (for example, synchronous signaling, system information, reference signaling and channel configuration).It should be noted that UE 906 can receive CP signaling from multiple RRH of different sub-band.UE 906 can based on the information for including in each CP wave beam and UE 906 determines which RRH be resident to relative position/received signal quality of each RRH.In the present embodiment, comparing it After all CP wave beams (for example, CP wave beam 816a and 816b in Fig. 8) having been received, the decision of UE 906 resides in RRH Subsequent UP content transmission is used on 904.

In step 7, once completion is synchronous with RRH's 904, UE 906 just executes RRC connection by RRH 904 and establishes (for example, registration/authorization, NAS negotiates).UE 906 can continue traditional foundation.For example, transfer function can be located at BBU 902 In with handle establish (for example, because customization C-RAN connect with EPC by tradition foundation be transferred to IP grouping and directly forward To Ethernet).As step 7 as a result, in BBU 902, RRC connection is established between RRH 904 and UE 906.In step 8, When UE 906 requests UP content transmission, RRH 904 can execute directional beam forming (for example, by the survey based on UE 906 The appropriate weighting of examination application) and M-MIMO beam forming configuration request message is sent to UE 906.The configuration of M-MIMO beam forming Request message may include the distribution frequency band for being used to form orientation UP wave beam and opposite M-MIMO parameter.

In step 9, after receiving M-MIMO beam forming configuration request message, the adjustable transmission mould of UE 906 Formula, for example, by activating additional RF/ Anneta module based on the subband distributed.Then, UE 906 is by using M-MIMO wave Beam shaping configuration response message confirms (ACK) or non-acknowledgement (NACK) message to reply.In step 10, when RRH 904 is from UE 906 when receiving M-MIMO beam forming configuration response message (for example, ACK), and RRH 904 can be in the subband up-regulation distributed Degree UP content is simultaneously formed for sending the orientation UP wave beam of UP content (for example, data) to UE 906, the wherein transmitting-receiving of UE 906 Device circuit receives UP content using orientation UP wave beam based on the CP signaling information obtained by CP wave beam.It should be noted that LBT process may be needed between step 9 and step 10 to ensure that particular sub-band RRH 904 attempts to send UP content to be freely to use (or unoccupied).If RRH 904 determines that particular sub-band is unoccupied, then RRH 904 can be used after LBT process UP wave beam with directional beam pattern provides UP content.

In a step 11, determine that RRH 904 attempts the particular sub-band of transmission CP signaling for the LBT process of CP signalling It is used or occupies, to fail to pass through LBT.In step 12, RRH 904 sends CP to BBU 902 and reconfigures request. Another subband can be assigned as new CP subband by BBU 902, and is reconfigured response using CP in step 13 and will be weighed New configuration is sent to RRH 904.CP reconfigure request and CP reconfigure response can be by open wireless device Interface (ORI) or other network interface protocols are transmitted.At step 14, RRH 904 can institute into its coverage area There is UEs to send CP and changes order to request CP subband to switch.It can be by using special RRC message or MAC control element (MAC CE order) is sent by directional beam forming transmission.When the UEs including UE 906, which receives CP subband, changes order, UEs can Re-synchronization is executed with just new CP subband, and restores CP reception.It should be noted that when UE 906 is under a RRH When coverage area is moved to another RRH, handoff procedure is needed to change the association under the present embodiment.It should be noted that working as When UE 906 is moved to the coverage area of another CP wave beam from the coverage area of a CP wave beam, it is also necessary to which handoff procedure changes Become association.

Figure 10 is the schematic diagram of the customization C-RAN using unified LBT process of the preferred embodiment of the application.In Figure 10 In, the C-RAN 1000 of customization includes BBU 1002, CP RRH 1004a and non-CP RRH 1004b.BBU 1002 and CP RRH 1004a and non-CP RRH 1004b communication.In the present embodiment, CP RRH 1004a is selected and is exclusively used in providing CP signaling biography It is defeated, and CP signaling information is unified/is shared to customize the RRH (packet of all connections in the coverage area under C-RAN 1000 Include non-CP RRH 1004b).CP RRH 1004a is formed in unauthorized CP subband 1020 by using omni-beam and sends CP Signaling.Non- CP RRH 1004b is prohibited from using unauthorized CP subband 1020 (as shown in the oblique line in Figure 10).CP wave beam 1016 can occupy band more smaller than the bandwidth of UP wave beam 1018a to 1018g (for example, from 20-280MHz) the UP subband occupied Wide (for example, about 10MHz).For example, UP wave beam 1018a, 1018b, 1018c, 1018d, 1018e, 1018f and 1018g can be each From the bandwidth with their own, for example, the UL/DL based on its special services UE requires to be adjusted.For example, UP wave beam 1018a Bandwidth with 280MHz, and UP wave beam 1018b has the bandwidth of 20MHz.The bandwidth of each UP wave beam can depend on bedding and clothing Message transmission rate needed for the UE of business.CP RRH 1004a can be configured with higher transmission power, to guarantee CP RRH Omnidirectional's CP wave beam 1016 of 1004a can cover the orientation UP wave beam formed by all non-CP RRH.

In the present embodiment, CP RRH 1004a is selected and is exclusively used in being provided CP signaling biography using omnidirectional's CP wave beam 1016 It is defeated, rather than CP RRH 1004b (and other non-CP RRH under the customization C-RAN 1000 being not explicitly shown in Figure 10) is selected It selects and sends UP content using orientation UP wave beam 1018a to 1018g.In another embodiment, it can choose non-CP RRH 1004b simultaneously be exclusively used in using omnidirectional's CP wave beam provide CP signaling, and can choose CP RRH 1004a (and in Figure 10 be not known Other RRH under the customization C-RAN 1000 shown) use orientation UP wave beam transmission UP content.BBU 1002 can be based on each The factor of RRH or reading are responsible for selection, to determine which RRH is best suited for sending CP signaling.

In the present embodiment, CP wave beam 1016 includes in all RRH coverage areas (including non-CP RRH 1004b) All necessary informations (for example, synchronous signaling, system information, reference signaling and channel configuration) of all UP wave beams.In this way, RRH Coverage area in all UEs can based on CP wave beam 1016 provide CP information it is synchronous with CPRRH 1004a, be used for lead to Cross the subsequent UP content (example of one or more UP wave beam 1018a, 1018b, 1018c, 1018d, 1018e, 1018f and 1018g Such as, DL/UL) transmission.That is, UP wave beam 1018a, 1018b, 1018c, 1018d, 1018e, 1018f and 1018g are ok Institute's necessary information is provided dependent on CP wave beam 1016 for its subsequent UP data transmission.

It should be understood that the beam pattern of CP wave beam 1016 needs not be omnidirectional.For example, CP wave beam 1016 can have Have beam pattern (for example, non-monodirectional beam pattern), beam pattern has all UP waves in the coverage area than non-CP RRH Beam (for example, UP wave beam 1018a to 1018g) broader beam angle (for example, there is broader access covering range).

In the present embodiment, since only CP RRH 1004a needs to execute LBT on CP subband 1020, do not need FDM or TDM mechanism supports more RRH CP signallings.In this way, the conflict between multiple RRH can be prevented, and can further mention Spectral efficient.If CP RRH 1004a fails through LBT, it can attempt to switch to another CP subband (for example, logical Cross instruction or distribution from BBU 1002).BBU1002 can request all non-CP RRH to stop using (for example, stopping hair Send) newly assigned CP subband.

From the perspective of UE, when UE enters the coverage area of C-RAN 1000 of customization, UE can be from CP RRH 1004a reads CP information.UE may reside on CPRRH 1004a.CP/ mobile management is anchored on CP RRH 1004a, makes When proper UE is moved to another non-CP RRH from a non-CP RRH (for example, non-CP RRH 1004b), do not need to switch Journey.

Figure 11 is showing for the signaling procedure of the customization C-RAN using unified LBT process of the preferred embodiment of the application It is intended to.As shown in figure 11, signaling procedure 1100 includes step 1 to 15.The step 1,2 of signaling procedure 1100 and 3 substantially similar The step 1 of signaling procedure 900 in Fig. 9,2 and 3, therefore omit for brevity.

In step 4, CP RRH 1104a is held before providing any CP signaling by the CP wave beam in unauthorized subband Row LBT process, to ensure that unauthorized subband (for example, channel) is unoccupied.In steps of 5, after executing LBT, if The unauthorized particular sub-band CP RRH 1104a for attempting to send CP transmission can freely use (or unoccupied), then CP RRH 1104a can be used CP wave beam (for example, CP wave beam 1016 in Figure 10) provide CP signaling, the CP wave beam have by using Omni-beam shapes the omni-beam pattern that antenna configuration uses particular sub-band (for example, CP subband 1020 in Figure 10).For example, All connections of the CP RRH 1104a into coverage area under customization C-RAN (for example, customization C-RAN 1000 in Figure 10) All UEs under RRH (for example, non-CP RRH 1004b in Figure 10) broadcast omnidirectional CP wave beam.In step 6,1106 UE (for example, coverage area of RRH that is idle or entering any connection) can obtain CP signaling by transceiver circuit, and be based on It include that execute DL/UL synchronous for information (for example, synchronous signaling, system information, reference signaling and channel configuration) in CP wave beam. It should be noted that UE 1106 only can receive CP signaling from CP RRH 1104a.

In step 7, once completion is synchronous with CP RRH 1104a's, UE 1106 is just executed by CP RRH 1104a (for example, registration/authorization, NAS negotiates) is established in RRC connection.UE 1106 can continue traditional foundation.For example, transfer function can be with It is established with handling (for example, because the C-RAN of customization, which is not connect with EPC, is transferred to IP points for tradition foundation in BBU 1102 Group is simultaneously forwarded directly to Ethernet).As step 7 as a result, in BBU 1102, CP RRH 1104a, non-CP RRH 1104b RRC connection is established between UE 1106.In one embodiment, non-CP RRH 1104b can be with broadcast synchronization signaling (without other CP signaling), and UE 1106 can be synchronous with non-CP RRH 1104b by synchronous signaling.In another embodiment, UE 1106 can using the synchronized result of CP RRH 1104a as with reference to (for example, using identical parameter) with non-CP RRH 1104b is synchronous, and wherein CP-RRH 1104a can provide additional feedback to adjust synchronization.

In step 8, CP RRH 1104a to non-CP RRH 1104b send UP activation command with initiate directional beam at Shape operation.In step 9, after receiving UP activation command from CP RRH 1104a, non-CP RRH 1104b is by fixed LBT process is executed before providing any UP content to UP wave beam, to ensure that unauthorized subband (for example, channel) is not occupied Neck.

In step 10, after executing LBT, if non-CP RRH 1104b attempts to send the unauthorized subband of UP transmission (or unoccupied) can freely be used, then non-CP RRH 1104b can to UE1106 send RS (reference signal, Reference signal).It should be noted that RS distribution can pass through CP signal deployment.Moreover, different UEs can have it is different RSs.In a step 11, UE 1106 responds RS feedback signal (for example, measurement result with RS) and arrives CP RRH 1104a.? In step 12, when CP RRH 1104a opens the directional beam forming for UE 1106 in application, CP RRH 1104a is to UE 1106, which send RRH, adds request message, and wherein RRH adds the ID of the request message instruction non-CP RRH of target (for example, physical area The configuration of the respective resources of identifier (PCI) and non-CP RRH 1104b) and/or directional beam shape beam index.In step 13 In, it is based on addition as a result, UE 1106 can be sent back to CP RRH 1104a RRH addition response message (for example, ACK or NACK).At step 14, after receiving RRH addition response message (for example, ACK) from UE 1106, CP RRH 1104a Confirmation message can be sent to the non-CP RRH of target (for example, non-CP RRH 1104b) to initiate data transmission.In step 15, After receiving confirmation message, the non-CP RRH of target (for example, non-CP RRH 1104b) can start via directional beam to UE 1106 sends UP content (for example, data), and wherein the transceiver circuit of UE 1106 is based on the CP letter obtained by CP wave beam Information is enabled, receives UP content using orientation UP wave beam.

In the present embodiment, it since only CP RRH 1104a needs to be implemented LBT before providing CP signaling, can keep away Exempt to conflict between RRH.Further, since a son, which is used only, in CP RRH 1104a brings offer CP signaling, therefore make to customize in C-RAN Remaining RRH (for example, non-CP RRH 1104b) may be used in frequency spectrum other subbands of (for example, unlicensed spectrum) to mention For UP content.It should be noted that UE 1106 may need and CP RRH 1104a and non-CP from the perspective of UE 1106 RRH 1104b keeps dual link.

Figure 12 A and 12B are the schematic diagrames of the customization C-RAN using alternately LBT process of one preferred embodiment of the application.? In the present embodiment, the C-RAN 1200A of customization shows the customization C-RAN that alternate LBT process is used during time T1, and The C-RAN 1200B of customization is shown during time T2 using the C-RAN of the customization of alternate LBT process.In Figure 12 A and In 12B, the C-RANs 1200A and 1200B of customization include BBU 1202, RRH 1204a and RRH 1204b, wherein 1202 BBU It is communicated to connect with RRH 1204a and RRH 1204b.

During time T1, RRH 1204a selected and be exclusively used in provide CP signaling, and CP signaling information unified/ It is shared on the RRH (including RRH 1204a and 1204b) of all connections in the coverage area under customization C-RAN 1200A.RRH 1204a is formed in transmission CP signaling in unauthorized CP subband 1220 by using omni-beam.RRH 1204b is prohibited from using non- Authorize CP subband 1220.In addition, other RRH for being connected to BBU 1202, which are prohibited from using unauthorized CP subband 1220, carries out CP/ UP transmission.

CP wave beam 1216a can occupy the bandwidth than UP wave beam 1218a to the 1218n UP subband occupied (for example, from 20- 280MHz) smaller bandwidth (for example, about 10MHz).For example, UP wave beam 1218a to 1218n can be respectively with their band Width, for example, being required based on the UL/DL of their special services UE to adjust.For example, UP wave beam 1218a has the band of 280MHz Width, and UP wave beam 1218m has the bandwidth of 20MHz.Number needed for the bandwidth of each UP wave beam can depend on the UE serviced According to transmission rate.RRH 1204a can be configured with higher transmission power, to guarantee the omnidirectional CP wave beam 1216a of RRH 1204a The orientation UP wave beam formed by RRH can be covered.

During time T1, RRH 1204a is selected to be exclusively used in provide CP signalling using omnidirectional CP wave beam 1216a, And RRH 1204a and 1204b (and other RRHd under the customization C-RAN 1200A being not explicitly shown in Figure 12 A) can make UP content is sent with orientation UP wave beam 1218a to 1218n.CP wave beam 1216a includes (including the RRH in all RRH coverage areas 1204a and 1204b) all UP wave beams all necessary informations (for example, synchronous signaling, system information, reference signaling and channel Configuration).For example, sharing (for example, identical) CP signaling information for all RRH.In this way, during time T1, the covering model of RRH The CP information that all UEs in enclosing can be provided based on CP wave beam 1216a is synchronous with RRH 1204a, be used to pass through one or The subsequent UP content (for example, DL/UL) of multiple UP wave beam 1218a to 1218n is transmitted.That is, during time T1, UP wave Beam 1218a to 1218n all relies on CP wave beam 1216a to provide institute's necessary information for its subsequent UP data transmission.

It should be understood that the beam pattern of CP wave beam 1216a needs not be omnidirectional.For example, CP wave beam 1216a can be with With beam pattern (for example, non-monodirectional beam pattern), have than all UP wave beams under the coverage area of RRH (for example, UP Wave beam 1218a to 1218n) beam angle wider (for example, with broader access covering) beam angle.

At time T2 (that is, immediately in time T1 expire after), RRH 1204a discharges the resource of unauthorized CP subband 1220 To meet LBT rule, and after RRH 1204a publication, RRH 1204b takes over unauthorized CP subband 1220 immediately., and Continue to use the RRH broadcast CP signaling information that unauthorized CP subband 1220 is all connections at the C-RAN 1200B of customization.

During time T2, RRH 1204b is selected and is exclusively used in providing CP signalling, and CP signaling information is united One/it is shared on the RRH (including RRH 1204a and 1204b) for customizing all connections in the coverage area under C-RAN 1200B. RRH 1204b is formed in transmission CP signaling in unauthorized CP subband 1220 by using omni-beam.RRH 1204a is prohibited to make With unauthorized CP subband 1220.It is carried out in addition, other RRH for being connected to BBU 1202 are prohibited from using unauthorized CP subband 1220 CP/UP transmission.

CP wave beam 1216b can occupy the bandwidth than UP wave beam 1218a to the 1218n UP subband occupied (for example, from 20- 280MHz) smaller bandwidth (for example, about 10MHz).For example, UP wave beam 1218a to 1218n can respectively have themselves Bandwidth, for example, requiring to adjust based on the UL/DL of their special services UE.For example, UP wave beam 1218a has 280MHz Bandwidth, and UP wave beam 1218m have 20MHz bandwidth.The bandwidth of each UP wave beam can depend on needed for the UE serviced Message transmission rate.RRH 1204b can be configured with higher transmission power, to guarantee omnidirectional's CP wave beam of RRH 1204b 1216b can cover the orientation UP wave beam formed by RRH.

It is selected to be exclusively used in time T2, RRH 1204b to provide CP signalling using omnidirectional CP wave beam 1216B, and RRH1204A and 1204b (and other RRH under the customization C-RAN 1200B being not explicitly shown in Figure 12 B) are able to use It orients UP wave beam 1218a to 1218n and sends UP content.CP wave beam 1216b includes (including the RRH in all RRH coverage areas 1204a and 1204b) all UP wave beams all necessary informations (for example, synchronous signaling, system information, reference signaling and channel Configuration).In this way, all UEs in the coverage area of RRH can be based on the CP provided by CP wave beam 1216b during time T2 Information is synchronous with RRH 1204b, with for by the subsequent UP content of one or more UP wave beam 1218a to 1218n (for example, DL/UL it) transmits.That is, UP wave beam 1218a to 1218n, which all relies on CP wave beam 1216b, to be come for it during time T2 Subsequent UP data transmission provides institute's necessary information.

It should be understood that the beam pattern of CP wave beam 1216b needs not be omnidirectional.For example, CP wave beam 1216b can be with With beam pattern (for example, non-monodirectional beam pattern), beam pattern has than all UP wave beams under the coverage area of RRH (for example, UP wave beam 1218a to 1218n beam angle) broader beam angle (for example, there is broader access covering range).

In the present embodiment, know exactly which that other side is unauthorized for occupying since RRH 1204a and RRH 1204b have The permission duration of CP subband 1220 (for example, pass through BBU 1202), RRH 1204a and RRH 1204b can other side its He allows the operating time to occupy unauthorized CP subband 1220 when expiring immediately, and on the unauthorized CP subband 1220 alternately Execute LBT.Therefore, RRH 1204a and RRH 1204b can continuously be occupied together as a small group unauthorized CP subband 1220 with RRH for all connections under the C-RAN 1200A and 1200B of customization provides CP signaling information.

From the perspective of UE, the RRH of grouping can be considered as single RRH by UE, and (UE does not distinguish single in described group RRH) and by CP subband association is executed.Therefore, based on the measurement result from UE, RRH appropriate can pass through guided wave Beam shaping sends UP content to UE using other subbands.UE it may also be desirable to keep doubly-linked with RRH 1204a and RRH 1204b It connects, and the finger that when will broadcast CP wave beam about each of RRH 1204a and RRH 1204b is received from BBU 1202 Show.

In the present embodiment, at least two RRH (RRH 1204a and 1204b) are configured as alternately executing LBT, so as to UP content transmission in the coverage area of the C-RAN of customization for all RRH provides consistent and unified CP covering.For example, working as The first RRH (for example, RRH 1204a) in the RRH (for example, RRH 1204a and 1204b) of grouping needs to discharge by LBT rule When the unauthorized resource of constraint, one of other RRsH in the RRH of grouping (for example, RRH 1204b) can be released in the first RRH It is immediately performed LBT when putting unauthorized resource, to occupy identical resource.Due to the first RRH discharge unauthorized resource it is definite when Between be to be known in advance by other RRH (for example, RRH 1204b) in group, other RRH of one or more of group can be the The period that one RRH is allowed to use unauthorized subband transmission CP signaling is immediately performed LBT when expiring.Therefore, it is grouped in RRH extremely Few other RRH can occupy unauthorized resource, and the RRH of grouping is allowed continuously to occupy unauthorized subband as one Group, to provide CP signalling to all UEs at the C-RAN of customization.Meanwhile CP signaling information it is identical as the RRH of grouping or It is shared.Coordination between the RRH of grouping can create united directional beam forming pattern, so that two or more directional beams Pattern can overlap each other.It is thereby achieved that the robustness of transmitted data rates and transmission.RRH can apply different stage Transmission power, to realize unified covering based on the arrangement of corresponding RRH.

Figure 13 is the signal of the signaling procedure of the customization C-RAN using alternately LBT process of one preferred embodiment of the application Figure.As shown in figure 13, signaling procedure 1300 includes step 1 to 11.

In step 1, BBU 1302 sends CP configuration message to the RRH (for example, RRH 1304a and 1304b) of grouping. CP configuration message may include distribution CP subband, and describe each grouping RRH formed CP wave beam omni-beam at The parameter (for example, sending power, beam-forming weights and phase) of shape pattern.In one embodiment, RRH 1304a and 1304b can be using identical parameter to form their corresponding CP beam patterns (for example, omni-beam pattern).At another In embodiment, RRH 1304a and 1304b can form their corresponding CP beam patterns (for example, complete using different parameters To beam pattern).List can be used to provide corresponding instruction in BBU 1302.More specifically, BBU 1302 can be in group Each RRH 1304a and 1304b configuration LBT behavior sequence and the duration.BBU 1302 can also determine described group The identity of each member.For example, BBU 1302 can execute grouping process for the RRH of connection.

In step 2, after receiving CP configuration message, RRH 1304a and 1304b can each comfortable specified CP Band configures at least one of its aerial array based on the parameter of requested CP beam pattern (for example, omni-beam pattern) Point.In step 3, after antenna configuration, RRH 1304a and 1304b can send CP configuration response to BBU 1302 and disappear Breath, with the state (for example, success or failure) configured to the notice of BBU 1302.RRH 1304a and 1304b also can indicate that CP matches The failure cause in response message is set, is reconfigured so that BBU 1302 is executed if necessary.

In step 4, during time T1, RRH 1304a can appoint being provided by the CP wave beam in unauthorized subband LBT process is executed before what CP signaling, to ensure that unauthorized subband (for example, channel) is unoccupied.In steps of 5, it is holding After row LBT, if attempt send CP transmission RRH 1304a in unauthorized particular sub-band can freely use (or not by Occupy), then CP wave beam (for example, CP wave beam 1216a in Figure 12) can be used to provide CP signaling, the CP in RRH 1304a Signaling has omni-beam pattern, and the omni-beam pattern is come by using omni-beam forming antenna configuration using specific son Band (for example, CP subband 1220 in Figure 12).For example, RRH 1304a can customization C-RAN (for example, determining in Figure 12 A The C-RAN 1200A of system) coverage area in all groupings RRH (for example, RRH 1304a and 1304b) under to all UEs Broadcast omnidirectional CP wave beam.

In step 6, UE 1306 (for example, coverage area of RRH that is idle or entering any connection) can pass through transmitting-receiving Device circuit obtains CP signaling information, and based in CP wave beam information (for example, synchronous signaling, system information, reference signaling and Channel configuration) execute DL/UL synchronization.It should be noted that UE 1306 can only be received from RRH 1304a during time T1 CP signaling.In step 7, it is known that the exact expiration time of T1 according to LBT rule (for example, allow RRH 1304a to occupy non-award Weigh subband resource duration), RRH 1304b can the time T2 beginning after following overdue time T1 immediately open Dynamic LBT process, goes the resource for occupying unauthorized subband, to ensure to continuously transmit CP signaling in the RRH of grouping.Signaling procedure 1300 step 8,9,10 and 11 are substantially similar to step 7,8,9 and 10 of the signaling procedure 900 in Fig. 9 respectively, therefore are It is succinct and omit.

Customization C-RAN deployment described in this application and framework make enterprise be able to carry out a greater degree of customization.In addition to Except other advantages, the C-RAN of above-mentioned customization can eliminate the authorization expense using authorization frequency spectrum, because CP and UP content can be with It is provided completely in unlicensed spectrum.

Claims

1. a kind of method, comprising:

Control plane (control plane, CP) signaling is provided using the first wave beam in radio resource；

User plane (user plane, UP) content is provided using the second wave beam in radio resource based on the CP signaling；

Wherein the first wave beam provides access covering range more broader than second wave beam.

2. the method as described in claim 1, which is characterized in that the radio resource includes radio-frequency spectrum and time slot, institute Stating radio-frequency spectrum includes authorized frequency bands or unlicensed band.

3. the method as described in claim 1, which is characterized in that first wave beam and second wave beam are millimeter wave beam.

4. the method as described in claim 1, which is characterized in that first wave beam has omni-beam pattern.

5. the method as described in claim 1, which is characterized in that second wave beam has directional beam pattern.

6. the method as described in claim 1, which is characterized in that first wave beam and second wave beam pass through remote radio Head (remote radio headers, RRH) transmission.

7. method according to claim 2, which is characterized in that first wave beam uses the first son of the radio-frequency spectrum Band, second wave beam use the second subband of the radio-frequency spectrum.

8. method according to claim 2, which is characterized in that when first wave beam uses the first of the radio-frequency spectrum Gap, second wave beam use the second time slot of the radio-frequency spectrum.

9. the method as described in claim 1, which is characterized in that the method also includes: described using in radio resource First wave beam CP signaling is provided before execute listem-before-talk (Listen-Before-Talk, LBT) process, with inspection Whether unoccupied look into the unauthorized subband broadcasted in first wave beam.

10. the method as described in claim 1, which is characterized in that the method also includes:

Another CP signaling is provided using the third wave beam in the radio resource；

Based on another CP signaling, another UP content is provided using the 4th wave beam in the radio resource；

Wherein the first wave beam and second wave beam are provided by the first RRH, the third wave beam and the 4th wave beam by 2nd RRH is provided；

Wherein, the first RRH and the 2nd RRH is coupled to Base Band Unit (baseband unit, BBU)；

Wherein, when first wave beam and the third wave beam use different sub-band and/or difference in the radio resource Gap.

11. the method as described in claim 1, which is characterized in that the CP signaling uses the radio resource by the first RRH Subband or time slot provide, the UP content mentioned by the 2nd RRH using another subband or another time slot of the radio resource For.

12. method as claimed in claim 11, which is characterized in that the first RRH to it is all by the 2nd RRH transmit UP wave beam provides the CP signaling.

13. method as claimed in claim 11, which is characterized in that the method also includes:

LBT process is executed before providing the UP content using second wave beam in the radio resource to check Whether the unauthorized subband for stating the transmission of the second wave beam is unoccupied.

14. the method as described in claim 1, which is characterized in that the CP signaling is provided by least two RRH, it is described at least Two RRH alternately provide the CP signaling using unauthorized CP subband.

15. method as claimed in claim 14, which is characterized in that it is to pass through that at least two RRH, which is alternately performed LBT process, When the unauthorized subband in one of RRH release CP signaling broadcast, another RRH is immediately performed LBT process, continuously to account for With the unauthorized subband.

16. the method as described in claim 1, which is characterized in that the CP signaling includes synchronous signaling, system information, reference At least one of signaling and channel configuration, and the UP content includes user data and user with particular reference to signaling.

17. a kind of remote radio head (remote radio headers, RRH), comprising: an aerial array, the aerial array For:

It is provided in user plane (user plane, UP) based on the CP signaling using the second wave beam in the radio resource Hold；

18. RRH as claimed in claim 17, which is characterized in that the RRH be coupled to Base Band Unit (baseband unit, BBU), the BBU is sent in transmission power configuration, band configurations, LBT configuration and beam forming weighting to the RRH At least one, to provide at least one of the CP signaling or the UP content.

19. RRH as claimed in claim 17, which is characterized in that the CP signaling includes synchronous signaling, system information, reference At least one of signaling and channel configuration, and the UP content includes user data and user with particular reference to signaling.

20. a kind of user equipment (user equipment, UE), comprising:

One receives circuit, and the reception circuit is used for:

Control plane (control plane, CP) signaling is received by the first wave beam in radio resource；

It is received in user plane (user plane, UP) based on the CP signaling using the second wave beam in the radio resource Hold；

21. UE as claimed in claim 20, which is characterized in that the radio resource includes radio-frequency spectrum and time slot, and The radio-frequency spectrum includes authorized frequency bands or unlicensed band.

22. UE as claimed in claim 20, which is characterized in that first wave beam and second wave beam are millimeter wave beams.

23. UE as claimed in claim 20, which is characterized in that first wave beam has omni-beam pattern.

24. UE as claimed in claim 20, which is characterized in that second wave beam has directional beam pattern.

25. UE as claimed in claim 20, which is characterized in that first wave beam and second wave beam pass through remote radio Head (remote radio headers, RRH) is transmitted to UE.

26. UE as claimed in claim 21, which is characterized in that first wave beam uses the first son of the radio-frequency spectrum Band, second wave beam use the second subband of the radio-frequency spectrum.

27. UE as claimed in claim 21, which is characterized in that when first wave beam uses the first of the radio-frequency spectrum Gap, second wave beam use the second time slot of the radio-frequency spectrum.

28. UE as claimed in claim 20, which is characterized in that the reception circuit also to:

Another CP signaling is received using the third wave beam in the radio resource；

Based on another CP signaling, is mentioned using the 4th wave beam in the radio resource and receive another UP content；

29. UE as claimed in claim 20, which is characterized in that the CP signaling uses the radio resource by the first RRH Subband or time slot provide, the UP content is used another subband or another time slot of the radio resource by the 2nd RRH It provides.

30. UE as claimed in claim 20, which is characterized in that the CP signaling is provided by least two RRH, and described at least two A RRH alternately provides the CP signaling using a unauthorized CP subband.

31. UE as claimed in claim 20, which is characterized in that the CP signaling includes synchronous signaling, system information, with reference to letter At least one of order and channel configuration, and the UP content includes user data and user with particular reference to signaling.