CN106535255A - Method and device for resource scheduling and control based on C-RAN - Google Patents
Method and device for resource scheduling and control based on C-RAN Download PDFInfo
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- 230000001360 synchronised effect Effects 0.000 claims description 36
- 238000013468 resource allocation Methods 0.000 claims description 16
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
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- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25752—Optical arrangements for wireless networks
- H04B10/25753—Distribution optical network, e.g. between a base station and a plurality of remote units
- H04B10/25754—Star network topology
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
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- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
The invention discloses a method and a device for resource scheduling and control based on C-RAN. The method comprises steps that a BBU (Base Band Unit) pool periodically sends a short pulse sequence in a wavelength dedicated control channel for activating an RRU (Remote Radio Unit); after the BBU pool activates the RRU, synchronization information and system information are broadcasted to an air interface, so that a user terminal is enabled to obtain the synchronization information and the system information, thereby enabling the user terminal and a district corresponding to the BBU to achieve downlink synchronization; further, the user terminal is enabled to establish connection and achieve uplink synchronization with the district through the random access process after achieving downlink synchronization with the district; after the user terminal achieves downlink synchronization and uplink synchronization with the district, the BBU pool allocates wireless bandwidth resources to the user terminal according to a buffer state report (BSR) sent by the user terminal in a scheduling period; and the BBU pool allocates optical wavelength bandwidth resources to the RRU according to the sum of all bandwidth requests of the user terminals corresponding to the RRU. The device is used for achieving the method.
Description
Technical field
The present invention relates to wireless communication field, and in particular to a kind of MAC layer resource for carrying radio frequency C-RAN based on simulated light is adjusted
Degree and control method and device.
Background technology
With the development of next generation wireless network, 5G turns towards the direction that more Large Copacity higher rate and super-intensive are disposed
Become, and 5G needs to provide the support to 2G/3G/LTE and WIFI to provide the isomery of a seamless coverage as UNE.
Flexible management and control of the intensive network design to cost and energy consumption problem and network proposes great challenge, in this regard, C-RAN is a kind of
Effective solution (with reference to China Mobile's white paper).C-RAN is to process (Centralized based on centralization
Processing), collaborative radio (Collaborative Radio) and real-time cloud computing framework (Real-time Cloud
Infrastructure wireless access network scheme).In BBU POOL (baseband pool, BBU, Base Band Unit, base band list
Unit) WDM (Wavelength Division are adopted Yu RRU (Remote Radio Unit, remote radio unit (RRU)) between
Multiplexing, wavelength-division multiplex) mode that carries carries out signal transmission.
Schematic network structures of the Fig. 1 for C-RAN, referring to Fig. 1, compared to traditional mobile network architecture, in C-RAN
In, BBU concentrate place and on move to metro edge node and form BBU ponds, connect remote radio unit (RRU) (RRU) below, BBU ponds are made
For a Super BBU and cloud master controller, the function of the BBU in fusion conventional mobile network and tradition PON
The OLT (Optical Line Terminal, optical line terminal) of (Passive Optical Network, passive optical-fiber network)
Correlation function, can realize radio baseband signal process and optical signal prosessing, resource management and control and scheduling feature.
Fig. 2 is the functional schematic of BBU ponds and RRU, and referring to Fig. 2, its transmission means carries radio frequency using simulated light, is drop
ADC/DAC functions are also moved on to BBU ponds by low cost, it is meant that the remote radio unit (RRU) (RRU) connected by BBU ponds is only responsible for penetrating
The light base band signal process of frequency function and low rate, so that substantially reduce disposing the significant cost and energy that bring because of network-intensive
Consumption, realizes the low time delay transmission of signal, it is contemplated that when radio frequency signal frequency is higher, and such as 5G Hz even 60G Hz, as which is penetrated
The attenuation characteristic of frequency, the program are particularly suited for the short-range intensive covering scene of Large Copacity.
The baseband pool of centralization is in terms of deployment cloud computing, multi-controller cooperative scheduling and SDN/NFV has natural
Advantage, and simulate the characteristic of forward pass net so that signal is realized at transparent transmission, light and wireless base band at remote radio unit (RRU)
Reason and control are all completed in the baseband pool of centralization.
Under the network architecture more than, the master controller (Central Controller) in BBU ponds is responsible for entering RRU
Row Wavelength Assignment and carry out the distribution of wireless time/frequency source block to user terminal (UE), scheduling of resource work by user terminal and
Master controller is directly consulted to complete, and RRU is not involved in traffic control.For enable each RRU be tuned to distribution different wave length,
Each RRU has a tunable transceiver.Master controller distributes all of uplink and downlink wavelength pair, { λ1,λ′1},
{λ2,λ′2... { λ n, λ ' n }, transmit for the data transfer between user terminal UE and BBU pool and control signaling.Additionally,
For the signalling (topology maintenance, the clock synchronization of RRU, wavelength tuning notice etc.) between RRU and BBU pool, then pass through
Short smooth base band pulse sequence is transmitted in a low rate base band dedicated channel { λ c, λ ' c } to complete.The realization of dynamic wavelength assignment is then
Selected by the real-time wavelength of RRU, structure and functional schematic of the Fig. 3 for RRU, referring to Fig. 3, the data of different wavelength are all
Transmit on a trunk optical fiber, which reaches each RRU via photo-coupler.RRU can be obtained by tunable wavelength wave filter
Wavelength X c and λ ' c.First tunable wavelength wave filter needs to leach λ c, and its corresponding control information, and RRU passes through afterwards
Photoreceiver PD, produces downlink signaling signal control signal.Second tunable wavelength wave filter only needs to filter up
Control wavelength X ' c, for modulating up signaling-information control signal.After the upper data of wavelength modulation, can through a light every
From device, trunk light is entered finally by photo-coupler, return master controller.
The baseband signal of a low speed can also be modulated in wavelength X c simultaneously come for controlling the tuning of wavelength, the signal leads to
A micro-control circuit decoding is crossed, for controlling tunable wavelength wave filter.After RRU is allocated wavelength, believed by above-mentioned control
Number, RRU will adjust tunable optic filter to the wavelength being allocated to λi,λ′i, proceed by data communication.
However, most of simulation forward pass scheme in this field concentrates on physical layer at present, and to MAC (Media Access
Control, media intervention control) layer research it is relatively fewer.Existing MAC layer has the utilization rate to BBU Pooled resources not
The problems such as height, load imbalance.
Therefore, a kind of method how is proposed, is capable of achieving rationally to divide based on the resource of the MAC layer of simulated light load radio frequency C-RAN
With and flexible dispatching, it is significant.
The content of the invention
For defect of the prior art, the embodiment of the present invention provides a kind of scheduling of resource and controlling party based on C-RAN
Method and device.
On the one hand, the embodiment of the present invention proposes a kind of MAC layer scheduling of resource and control method based on C-RAN, the side
Method includes：
Base Band Unit BBU ponds pass through periodically to send short pulse sequence in wavelength specific control channel, to far end radio frequency
Unit R RU enters line activating；
The BBU ponds after the RRU is activated, by by synchronizing information and system information broadcast to eating dishes without rice or wine, to use
Family terminal obtains the synchronizing information and system information, so that user terminal cell reality corresponding with the BBU ponds
Existing down-going synchronous；And then make the user terminal after down-going synchronous are realized with the cell by random access procedure with it is described
Cell is set up and connects and realize uplink synchronous；
After the user terminal realizes down-going synchronous and uplink synchronous with the cell, within a dispatching cycle, institute
The buffer status reporting BSR that BBU ponds are sent according to the user terminal is stated, is the user terminal distribution wireless bandwidth resource；
Meanwhile, bandwidth request size sum of the BBU ponds according to the corresponding all user terminals of the RRU is the RRU point
Luminous intensity distribution wavelength bandwidth resource.
The scheduling of resource based on C-RAN and control method that the present invention is provided, due to can be according to the actual need of user terminal
Seek distributing radio resource, and while the distribution of light bandwidth resources can be carried out to RRU according to the bandwidth request size of user terminal, greatly
It is big to reduce Signalling exchange flow process, so as to reduce time delay.Therefore, it is capable of achieving to carry the MAC layer resource of radio frequency C-RAN based on simulated light
Reasonable distribution and flexible dispatching, so that solve tidal effect, the low problem of resource utilization.
On the other hand, the embodiment of the present invention also proposes a kind of scheduling of resource based on C-RAN and control device, described device
Including：
RRU active modules, for making Base Band Unit BBU ponds by periodically sending short pulse in wavelength specific control channel
Sequence is rushed, line activating is entered to remote radio unit (RRU) RRU；
Synchronization module, for making the BBU ponds after the RRU is activated, by will be synchronizing information and system information wide
Cast to and eat dishes without rice or wine, so that user terminal obtains the synchronizing information and system information, so that the user terminal and the BBU
The corresponding cell in pond realizes down-going synchronous；And then make the user terminal after down-going synchronous are realized with the cell by random
Access procedure is set up with the cell and is connected and realizes uplink synchronous
Resource distribution module, after making the user terminal realize down-going synchronous and uplink synchronous with the cell,
Within a dispatching cycle, the buffer status reporting BSR that the BBU ponds are sent according to the user terminal is user's end
End distribution wireless bandwidth resource；Meanwhile, bandwidth request of the BBU ponds according to the corresponding all user terminals of the RRU
Size sum, is the RRU distribution optical wavelength bandwidth resources..
The scheduling of resource based on C-RAN and control device that the present invention is provided, due to can be according to the actual need of user terminal
Seek distributing radio resource, and while the distribution of light bandwidth resources can be carried out to RRU according to the bandwidth request size of user terminal, greatly
It is big to reduce Signalling exchange flow process, so as to reduce time delay.Therefore, it is capable of achieving to carry the MAC layer resource of radio frequency C-RAN based on simulated light
Reasonable distribution and flexible dispatching, so that solve tidal effect, the low problem of resource utilization.
Description of the drawings
Schematic network structures of the Fig. 1 for C-RAN；
Fig. 2 is the functional schematic of BBU ponds and RRU；
Structure and functional schematic of the Fig. 3 for RRU；
Fig. 4 is the schematic flow sheet of scheduling of resource of the present invention based on C-RAN and control method embodiment；
Fig. 5 be scheduling of resource of the present invention based on C-RAN with control method embodiment in enter the flow process of line activating to RRU and show
It is intended to；
Fig. 6 is scheduling of resource of the present invention based on C-RAN and user terminal Stochastic accessing cell in control method embodiment
Schematic flow sheet；
Fig. 7 be scheduling of resource of the present invention based on C-RAN with BBU ponds in control method embodiment to RRU and user's end
The schematic flow sheet that end carries out data transmission；
Fig. 8 is the structural representation of scheduling of resource of the present invention based on C-RAN and control device embodiment.
Specific embodiment
For making purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is explicitly described, it is clear that described embodiment be the present invention
A part of embodiment, rather than the embodiment of whole.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
The every other embodiment obtained under the premise of making creative work, belongs to the scope of protection of the invention.
Fig. 4 is the schematic flow sheet of scheduling of resource of the present invention based on C-RAN and control method embodiment, referring to Fig. 4, this
Embodiment discloses a kind of scheduling of resource based on C-RAN and control method, including：
S1, Base Band Unit BBU ponds are penetrated to distal end by periodically sending short pulse sequence in wavelength specific control channel
Frequency unit R RU enters line activating；
S2, the BBU ponds after the RRU is activated, by by synchronizing information and system information broadcast to eating dishes without rice or wine so that
User terminal obtains the synchronizing information and system information, so that user terminal cell corresponding with the BBU ponds
Realize down-going synchronous；And then make the user terminal after down-going synchronous are realized with the cell by random access procedure and institute
State cell and set up and connect and realize uplink synchronous；
After S3, the user terminal realize down-going synchronous and uplink synchronous with the cell, within a dispatching cycle,
The buffer status reporting BSR that the BBU ponds are sent according to the user terminal, is the user terminal distribution wireless bandwidth money
Source；Meanwhile, bandwidth request size sum of the BBU ponds according to the corresponding all user terminals of the RRU is described
RRU distributes optical wavelength bandwidth resources.
The scheduling of resource based on C-RAN and control method that the present invention is provided, due to can be according to the actual need of user terminal
Seek distributing radio resource, and while the distribution of light bandwidth resources can be carried out to RRU according to the bandwidth request size of user terminal, greatly
It is big to reduce Signalling exchange flow process, so as to reduce time delay.Therefore, it is capable of achieving to carry the MAC layer resource of radio frequency C-RAN based on simulated light
Reasonable distribution and flexible dispatching, so that solve tidal effect, the low problem of resource utilization.
In the above-described embodiments, the RRU shares a wavelength by OFDM, and the BBU ponds can be according to user's end
The number of users of the bandwidth request at end or difference RRU dynamically distributes wavelength：The more subcarriers of focus RRU are distributed to, together
The subcarrier that time-division provisioned user terminal is less or RRU that bandwidth demand is relatively low is less.So as to realize the flexible of wavelength resource
Scheduling, improves resource utilization.In step sl, the BBU ponds periodically by wavelength specific control channel to the RRU
Send short pulse sequence；
The RRU after the short pulse sequence is received, by ascending control channel to the BBU ponds reply one with
The short pulse sequence persistent period identical pulse；
The BBU ponds receive it is described with the short pulse sequence persistent period identical pulse after, with polling mode to
The RRU distributes primary data wavelength pair, so as to activate the RRU.
Specifically, Fig. 5 be scheduling of resource of the present invention based on C-RAN with control method embodiment in line activating is entered to RRU
Schematic flow sheet, referring to Fig. 5, in step sl, the BBU ponds periodically send short on wavelength specific control channel λ c
Pulse train, if the RRU receives the short pulse sequence, on ascending control channel λ ' c, reply one is short with described
The identical pulse of pulse train persistent period, so that the presence of the RRU is known in the BBU ponds.And then, the BBU ponds with
The mode of poll distributes primary data wavelength pair for each RRU, to complete the activation to the RRU.
Wherein, the primary data wavelength is to for the data transfer between the user terminal and the BBU ponds.
In step s 2, the BBU ponds by by synchronizing information and system information broadcast to eating dishes without rice or wine so that user terminal
The synchronizing information and system information is obtained, so that with cell, the user terminal realizes that down-going synchronous include：
The BBU ponds are sent synchronizing information and system information to the RRU by data wavelength channel, and are broadcasted to sky
Mouth is so that user terminal corresponding with the RRU obtains the synchronizing information and system information；
The user terminal completes cell identification according to the synchronizing information and the downlink reference signal in system information
And searching system information, so as to realize the down-going synchronous with cell, to access the cell.
Fig. 6 is scheduling of resource of the present invention based on C-RAN and user terminal Stochastic accessing cell in control method embodiment
Schematic flow sheet, referring to Fig. 6, in step s 2, the user terminal passes through random access procedure and the cell is set up and connected
What is connect concretely comprises the following steps：
S21, the user terminal send Stochastic accessing prefix on RACH (PRACH).Random access procedure
Initialization is initiated by PDCCH orders or media access control sublayer.It is the transmission of arbitrary access front signal first.The main purpose of the step
The propagation delay time of terminal correctly can be estimated for base station, and multi-user is solved while the conflict for initiating access request is asked
Topic.
, after random access sequence is detected, MAC layer produces accidental access response (RAR) for S22, base station, and under passing through
Row shared channel (PDSCH) sends.Numbering of the message including at least received lead code, the time adjustment of up transmission
The interim C-RNTI of amount (TA), up PUSCH schedule informations and distribution.
The feedback information that the lateral terminal of network sends includes the propagation delay time needed for uplink synchronous, and current system
Access overload conditions (conflict evading is carried out using backoff mechanism for user).In addition, network side is also accessing user
The ascending resource position of distribution feeds back to terminal.
S23, the user terminal carry out upstream data according to the schedule information and TA information that carry in accidental access response
(PUSCH) transmission；The message contains unique ID of the user terminal, i.e. TMSI.The rrc layer of the user terminal is produced
RRC Connection Request。
ID C-RNTI of user terminal transmission on specified ascending resource itself.
S24, base station receive the upstream message of the user terminal, return competition to the user terminal being successfully accessed
Solve message；Unique ID (C-RNTI) of the user terminal being successfully accessed is contained in the message.RRC Contention
Resolution is produced by the rrc layer of base station.Whether the user of oneself is included in the addressed user terminal detection Msg4
Termination ID.If having, reply ACK and think Stochastic accessing success；If nothing, then it is assumed that competition failure, wait are accessed next time.
Conflict solving feedback of the information is then given the user terminal by network side.So far random access procedure will be fully solved many
User asks the collision problem that access system is brought simultaneously.
Fig. 7 be scheduling of resource of the present invention based on C-RAN with BBU ponds in control method embodiment to RRU and user's end
The schematic flow sheet that end carries out data transmission, referring to Fig. 7, in step s3, it should be noted that the dispatching cycle can be advance
Arrange, such as 1ms or 2ms carry out self-adaptative adjustment also dependent on business demand, for example, when portfolio is relatively small, can be by
It is adjusted to 2ms dispatching cycles, and when portfolio is relatively more, dispatching cycle can be adjusted to 1ms.
Specifically, the buffer status reporting BSR that the BBU ponds are sent according to the user terminal, is the user terminal
Distributing radio resource includes：
The BBU ponds detect the uplink scheduling request SR (Scheduling Request) that the user terminal sends
Afterwards, it is the user terminal distribution ascending resource, so that the user terminal sends buffer status reporting BSR (Buffer
Staus Report)；
The buffer status reporting BSR that the BBU ponds are sent according to the user terminal, is that the user terminal is carried out
Radio resource allocation；
Wherein, the BBU ponds can be the use according to information such as qos policy, SINR, attack strategy allocation strategy, cache sizes
Family terminal carries out the scheduling and distribution of Radio Resource.
The BBU ponds send the information of radio resource allocation to RRU corresponding with the user terminal, described and institute
State the corresponding RRU of user terminal to broadcast wireless bandwidth resource distribution information to eating dishes without rice or wine, so that the user terminal is obtained
The Radio Resource.
Bandwidth request size sum of the BBU ponds according to the corresponding all user terminals of the RRU, is described
RRU distribution optical wavelength bandwidth resources include：
Bandwidth request size sum of the BBU ponds according to the corresponding all user terminals of the RRU, to described
RRU carries out optical wavelength bandwidth resource allocation, and the optical wavelength bandwidth resource allocation information is passed through wavelength specific control channel λ
C is sent to the RRU；
The RRU according to the optical wavelength bandwidth resource allocation information, be tuned to respective wavelength.
Specifically, the RRU can decode corresponding bandwidth allocation information by low speed base band control information processing module, and
Be tuned to respective wavelength, realize the flexible dispatching of wavelength resource.
Alternatively, in the above-described embodiments, for long-time does not have user terminal to access RRU, ripple can be only accessed
In long base band control channel, so as to realize the dormancy of RRU, then the wavelength base band control channel is controlled for carrying signal signaling
The signaling of passage, and temporarily unrecoverable data wavelength channel, to reduce resource consumption.
Fig. 8 is the structural representation of scheduling of resource of the present invention based on C-RAN and control device embodiment, referring to Fig. 8, this
Invention also proposes a kind of MAC layer scheduling of resource and control device for carrying radio frequency C-RAN based on simulated light, including：RRU active modules
1st, synchronization module 2 and resource distribution module 3；The RRU active modules 1 are used for making Base Band Unit BBU ponds by periodically
Short pulse sequence is sent in wavelength specific control channel, line activating is entered to remote radio unit (RRU) RRU；The synchronization module 2 is used for
The BBU ponds are made after the RRU is activated, by by synchronizing information and system information broadcast to eating dishes without rice or wine so that user terminal
Obtain the synchronizing information and system information so that user terminal cell corresponding with the BBU ponds realize it is descending
It is synchronous；And then the user terminal is built with the cell by random access procedure after down-going synchronous are realized with the cell
Vertical connection simultaneously realizes uplink synchronous；The resource distribution module 3 is descending same for realizing the user terminal and the cell
After step and uplink synchronous, within a dispatching cycle, the buffer status reporting that the BBU ponds are sent according to the user terminal
BSR, is the user terminal distribution wireless bandwidth resource；Meanwhile, the BBU ponds are according to the corresponding all use of the RRU
The bandwidth request size sum of family terminal, is the RRU distribution optical wavelength bandwidth resources.
The scheduling of resource based on C-RAN and control device that the present invention is provided, due to can be according to the actual need of user terminal
Seek distributing radio resource, and while the distribution of light bandwidth resources can be carried out to RRU according to the bandwidth request size of user terminal, greatly
It is big to reduce Signalling exchange flow process, so as to reduce time delay.Therefore, it is capable of achieving to carry the MAC layer resource of radio frequency C-RAN based on simulated light
Reasonable distribution and flexible dispatching, so that solve tidal effect, the low problem of resource utilization.
Specifically, the RRU active modules 1 specifically for：
The BBU ponds are made to send short pulse sequence periodically by wavelength specific control channel to the RRU；
The RRU is made after the short pulse sequence is received, and one is replied by ascending control channel to the BBU ponds
With the short pulse sequence persistent period identical pulse；
Make the BBU ponds receive it is described with the short pulse sequence persistent period identical pulse after, with polling mode
Distribute primary data wavelength pair to the RRU, so as to activate the RRU.
Wherein, the primary data wavelength is to for the data transfer between the user terminal and the BBU ponds.
The synchronization module 2 specifically for：
The BBU ponds is sent synchronizing information and system information to the RRU by data wavelength channel, and broadcast to
Eat dishes without rice or wine so that user terminal corresponding with the RRU obtains the synchronizing information and system information；
The user terminal is made to complete cell knowledge according to the synchronizing information and the downlink reference signal in system information
Not and searching system information, so as to realize the down-going synchronous with cell, to access the cell.
The resource distribution module 3 specifically for：
After making the BBU ponds detect the uplink scheduling request SR that the user terminal sends, it is the user terminal point
With ascending resource, so that the user terminal sends buffer status reporting BSR；
The buffer status reporting BSR for making the BBU ponds be sent according to the user terminal, is that the user terminal enters
Row wireless bandwidth resource distributes；
The BBU ponds are made to send wireless bandwidth resource distribution information to RRU corresponding with the user terminal, institute
State RRU corresponding with the user terminal to broadcast wireless bandwidth resource distribution information to eating dishes without rice or wine, so that user's end
End obtains the Radio Resource.
Wherein, the resource distribution module 3 can make the BBU ponds can be according to qos policy, SINR, attack strategy allocation strategy, slow
Deposit scheduling and distribution that the information such as size are that the user terminal carries out Radio Resource.
The resource distribution module 3 also particularly useful for：
The BBU ponds are made according to the bandwidth request size sum of the corresponding all user terminals of the RRU, to described
RRU carries out optical wavelength bandwidth resource allocation, and the optical wavelength bandwidth resource allocation information is passed through wavelength specific control channel
It is sent to the RRU；
The RRU is made according to the optical wavelength bandwidth resource allocation information, be tuned to respective wavelength.
It should be noted that the dispatching cycle can pre-set, such as 1ms or 2ms are carried out also dependent on business demand
Self-adaptative adjustment, for example, when portfolio is relatively small, can be adjusted to 2ms dispatching cycle, and relatively many in portfolio
When, dispatching cycle can be adjusted to 1ms.
Finally it should be noted that：Above example only to illustrate technical scheme, rather than a limitation；Although
With reference to the foregoing embodiments the present invention has been described in detail, it will be understood by those within the art that：Which still may be used
To modify to the technical scheme described in foregoing embodiments, or equivalent is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (10)
1. a kind of scheduling of resource and control method based on C-RAN, it is characterised in that include：
Base Band Unit BBU ponds pass through periodically to send short pulse sequence in wavelength specific control channel, to remote radio unit (RRU)
RRU enters line activating；
The BBU ponds after the RRU is activated, by by synchronizing information and system information broadcast to eating dishes without rice or wine so that user's end
End obtains the synchronizing information and system information, so that under user terminal cell corresponding with the BBU ponds is realized
Row is synchronous；And then make the user terminal after down-going synchronous are realized with the cell by random access procedure and the cell
Foundation connects and realizes uplink synchronous；
After the user terminal realizes down-going synchronous and uplink synchronous with the cell, within a dispatching cycle, the BBU
The buffer status reporting BSR that pond is sent according to the user terminal, is the user terminal distribution wireless bandwidth resource；Meanwhile,
Bandwidth request size sum of the BBU ponds according to the corresponding all user terminals of the RRU, is the RRU distribution light
Wavelength bandwidth resource.
2. method according to claim 1, it is characterised in that the BBU ponds pass through periodically in wavelength specific control
Channel sends short pulse sequence, and entering line activating to RRU includes：
The BBU ponds send short pulse sequence periodically by wavelength specific control channel to the RRU；
The RRU after the short pulse sequence is received, by ascending control channel to the BBU ponds reply one with it is described
The identical pulse of short pulse sequence persistent period；
The BBU ponds receive it is described with the short pulse sequence persistent period identical pulse after, with polling mode to described
RRU distributes primary data wavelength pair, so as to activate the RRU.
3. method according to claim 1, it is characterised in that the BBU ponds are by by synchronizing information and system information
Broadcast to eating dishes without rice or wine, so that user terminal obtains the synchronizing information and system information, so that the user terminal and cell
Realize that down-going synchronous include：
The BBU ponds are sent synchronizing information and system information to the RRU by data wavelength channel, and broadcast to eat dishes without rice or wine with
User terminal corresponding with the RRU is made to obtain the synchronizing information and system information；
The user terminal completes cell identification and examines according to the synchronizing information and the downlink reference signal in system information
Cable system information, so as to realize the down-going synchronous with cell, to access the cell.
4. method according to claim 1, it is characterised in that the buffering that the BBU ponds are sent according to the user terminal
State report BSR, is that the user terminal distribution wireless bandwidth resource includes：
After the BBU ponds detect the uplink scheduling request SR that the user terminal sends, it is that the user terminal distribution is up
Resource, so that the user terminal sends buffer status reporting BSR；
The buffer status reporting BSR that the BBU ponds are sent according to the user terminal, is that the user terminal is carried out wirelessly
Bandwidth resource allocation；
The BBU ponds send wireless bandwidth resource distribution information to RRU corresponding with the user terminal, described and institute
State the corresponding RRU of user terminal to broadcast wireless bandwidth resource distribution information to eating dishes without rice or wine, so that the user terminal is obtained
The Radio Resource.
5. method according to claim 1, it is characterised in that the BBU ponds are according to the corresponding all use of the RRU
The bandwidth request size sum of family terminal, is that the RRU distribution optical wavelength bandwidth resources include：
The BBU ponds are entered to the RRU according to the bandwidth request size sum of the corresponding all user terminals of the RRU
Row optical wavelength bandwidth resource allocation, and the optical wavelength bandwidth resource allocation information is sent to by wavelength specific control channel
The RRU；
The RRU according to the optical wavelength bandwidth resource allocation information, be tuned to respective wavelength.
6. a kind of scheduling of resource and control device based on C-RAN, it is characterised in that include：
RRU active modules, for making Base Band Unit BBU ponds by periodically sending short pulse sequence in wavelength specific control channel
Row, enter line activating to remote radio unit (RRU) RRU；
Synchronization module, for making the BBU ponds after the RRU is activated, by by synchronizing information and system information broadcast extremely
Eat dishes without rice or wine, so that user terminal obtains the synchronizing information and system information, so that the user terminal and the BBU ponds pair
The cell answered realizes down-going synchronous；And then make the user terminal pass through Stochastic accessing after down-going synchronous are realized with the cell
Process is set up with the cell and is connected and realizes uplink synchronous
Resource distribution module, after making the user terminal realize down-going synchronous and uplink synchronous with the cell, one
In individual dispatching cycle, the buffer status reporting BSR that the BBU ponds are sent according to the user terminal is the user terminal point
With wireless bandwidth resource；Meanwhile, bandwidth request size of the BBU ponds according to the corresponding all user terminals of the RRU
Sum, is the RRU distribution optical wavelength bandwidth resources.
7. device according to claim 6, it is characterised in that the RRU active modules specifically for：
The BBU ponds are made to send short pulse sequence periodically by wavelength specific control channel to the RRU；
The RRU is made after the short pulse sequence is received, one and institute are replied to the BBU ponds by ascending control channel
State the identical pulse of short pulse sequence persistent period；
Make the BBU ponds receive it is described with the short pulse sequence persistent period identical pulse after, with polling mode to institute
RRU distribution primary data wavelength pair is stated, so as to activate the RRU.
8. device according to claim 6, it is characterised in that the synchronization module specifically for：
The BBU ponds is sent synchronizing information and system information to the RRU by data wavelength channel, and broadcast to eating dishes without rice or wine
So that user terminal corresponding with the RRU obtains the synchronizing information and system information；
The user terminal is made to complete cell identification simultaneously according to the synchronizing information and the downlink reference signal in system information
Searching system information, so as to realize the down-going synchronous with cell, to access the cell.
9. device according to claim 6, it is characterised in that the resource distribution module specifically for：
After making the BBU ponds detect the uplink scheduling request SR that the user terminal sends, it is in the user terminal distribution
Row resource, so that the user terminal sends buffer status reporting BSR；
The buffer status reporting BSR for making the BBU ponds be sent according to the user terminal, is that the user terminal carries out nothing
Line bandwidth resource allocation；
Make the BBU ponds send wireless bandwidth resource distribution information to RRU corresponding with the user terminal, it is described with
The corresponding RRU of the user terminal broadcasts wireless bandwidth resource distribution information to eating dishes without rice or wine, so that the user terminal is obtained
Take the Radio Resource.
10. device according to claim 6, it is characterised in that the resource distribution module specifically for：
The BBU ponds are made according to the bandwidth request size sum of the corresponding all user terminals of the RRU, to the RRU
Optical wavelength bandwidth resource allocation is carried out, and the optical wavelength bandwidth resource allocation information is transmitted by wavelength specific control channel
To the RRU；
The RRU is made according to the optical wavelength bandwidth resource allocation information, be tuned to respective wavelength.
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