Background technology
E-UTRAN (evolved Universal Terrestrial Radio Access Network, evolution it is general
Terrestrial Radio Access Network) the network architecture as shown in figure 1, main be made up of eNB (evolved NodeB, evolution base station).
MME (Mobility Management Entity, mobile management examination question) uses S1-MME interface and eNB between
It is connected;ENB completes access network function, and idle port communication is passed through with UE (User Equipment, user equipment).It is attached for each
The UE of network, has a MME for it provides service, the MME is referred to as the service MME of UE.S1-MME interface is right for UE is provided
Chain of command is serviced, including mobile management and bearer management function.
S-GW (Serving Gate Way, gateway) is connected between eNB using S1-U interface, attached for each
The UE of network, has a S-GW for it provides service, the S-GW is referred to as the service S-GW of UE.S1-U interface provides use for UE
Family face services, and the user face data of UE is by S1-U GTP (GPRS (General Packet Radio Service, general point
Group wireless service technology) tunnel protocol) it is carried between S-GW and eNB and transmits.
User plane and chain of command agreement stack difference between UE and network is as shown in Figures 2 and 3.User plane protocol includes
PDCP (Packet Data Convergence Protocol, PDCP), RLC (Radio Link
Control, wireless connection control), MAC (Media Access Control, medium education) and PHY (Physical
Layer, physical layer) layer;Chain of command agreement includes RRC (Radio Resource Control, wireless heterogeneous networks) and NAS
(non-access) layer, wherein, rrc layer message needs the treatment by user plane protocol layer, then is eating dishes without rice or wine to be transmitted;NAS layers disappears
Breath is transmitted in eating dishes without rice or wine to be encapsulated in RRC information.
In existing LTE/LTE-A networks, the RRC/PDCP/RLC/MAC/PHY peer layers of UE are all located at same eNB
Interior, the NAS layers of peer layer of UE is located at and is established in the MME being connected for the S1 of the UE with above-mentioned eNB.
Traditional macro base station (macro eNB) individual layer overlay network can not meet people to data service rate and appearance
Amount increasing need.Therefore, the mode of layering networking is introduced for solving the problem:By in hot spot region, family room
The base station that the small overlay environment such as interior environment, working environment lays some low-power (is represented, i.e. this ground with local eNB below
Stand, the form such as including Femto/Pico/Relay), obtain the effect of cell splitting so that operator can provide the user more
High data rate, more inexpensive business.
Layering networking also brings certain negative interaction while network capacity is increased:Due to low-power base station cell
The coverage of (being represented with home cell or local cell below) is small so that the switching frequency and number of times of UE all increase
Plus, increased the risk that UE occurs communication disruption when switching over.
In order to reduce the frequency that UE is switched between macrocell (macro cell) and home cell (local cell)
The network design mode that rate, a kind of user plane and chain of command are separate is introduced into.As shown in figure 4, macro cell provide basis covering
Lid, local cell provide focus covering, there is data/signaling interface (wired/nothing between local cell and macro cell
Line interface), UE can be operated under macro eNB or local eNB.
Because the cell coverage area of local eNB controls is small, the UE of service is few, so being connected to the UE of local eNB
Tend to obtain more preferable service quality, such as:Obtain service rate higher, higher-quality link.Therefore, when being connected to
During the cell that the UE of macro eNB is controlled close to local eNB, local eNB can be switched to obtain local eNB offers
Service;When the cell that UE is controlled away from local eNB, it is necessary to be switched to the cell of macro eNB controls, to keep wireless
Connection.
Carried more than under the separate network architecture, when the region that UE is covered in only macro cell, the chain of command of UE
Connection and user plane connect (i.e. DRB:Data Radio Bearer, Data Radio Bearer) all in macro eNB;When UE movements
To macro cell and local cell it is overlapping covered when, UE all or part of user plane connection (DRB) be transferred
To home base stations, to obtain service transmission rate higher, chain of command connection stills remain in macro base station, to prevent chain of command from connecting
Connect handoff failure and cause UE call drops.
Fig. 5 shows the network architecture of a kind of use chain of command and user plane isolation technics, and UE is connected to two simultaneously
ENB, M-L interfaces represent the logic interfacing between macro eNB and local eNB in figure.SRB (the Signalling of UE
Radio Bearer, Signaling Radio Bearer) it is retained on macro eNB, and all or part DRB (Data Radio
Bearer, Data Radio Bearer) PDCP/RLC/MAC/PHY part be maintained on local eNB.The upstream data of UE is reached
SGW (gateway) is forwarded directly to after local eNB, the downlink data of UE is forwarded directly to local eNB after reaching SGW,
So as to reduce processing loads of the macro eNB to UE packets.Under the framework, positioned at local eNB carry protocol stack such as
Shown in Fig. 6.
Fig. 7 shows another kind using chain of command and the network architecture of user plane isolation technics.Under the framework, it is located at
The protocol stack that local eNB are carried is as shown in Figure 8.
In HetNet, (Heterogeneous Network, heterogeneous network are made up of, such as different size, type cell
Including:Macro cell, local cell) under scene, because local cell coverages are small, UE slightly movements will be triggered
Switching, therefore, it can that the user plane of UE only is switched into local eNB.In order to support this characteristic, it is necessary to solve how to manage and
The problem of local cell resources is distributed, but not yet has corresponding solution at present.
Specific embodiment
In order to realize carrying out local bearing resource management in separated network is carried, following solution is the embodiment of the invention provides
Certainly scheme:The public resource of local cell is managed and is configured by macro eNB, and be directed to the private resource of UE by
Local eNB carry out local management and configuration, when macro eNB determine to perform chain of command and user plane lock out operation,
Local eNB are responsible for distributing proprietary random access resource, and for proprietary configurations such as RLC, the MAC and physical layer for separating DRB
Information simultaneously notifies macro eNB.
The embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.
As shown in figure 9, when macro eNB determine to perform chain of command and user plane lock out operation for UE, performing following
Flow:
Step 1:Macro eNB send to carry to set up and ask (Bear Setup Request) message to give local eNB, should
Include the information of UE and the bearer related information of UE in request message.
Specifically, carrying, set up in request message can be including but not limited to following information:
The AP ID (access point identity) of interface, for unique mark UE on macro eNB, by macro eNB points
Match somebody with somebody.Optionally, the unique mark of the UE that AP ID can also be distributed by macro eNB, such as C-RNTI (Cell-Radio Network
Temporary Identifier, Cell Radio Network Temporary Identifier/Identity, Cell-RNTI) replace, or both all include;
E-RAB ID, for one E-RAB of unique mark (Enhanced-Radio Access Bear, it is enhanced wireless
Access bearer);
Transport Layer address of the macro eNB for each E-RAB;
Separate QoS (Quality of Service, service quality) parameter of DRB, such as QCI (QoS Class
Identifier, QoS classification logotype) or/and ARP (Allocation and Retention Priorit, distribute and keep and be excellent
First level) etc. parameter;
PCell (main carrier) and/or SCell (secondary carrier) configuration of desired local eNB, can also further include
Corresponding measurement result and cell type are indicated;
The partial capability of UE, specifically includes:UE Category (classification), radio frequency parameter and physical layer parameter, optionally,
May also include feature group mark.PDCP/RLC/MAC/PHY for UE all or parts DRB need to be maintained on local eNB
Framework, the partial capability of UE also includes PDCP parameters.Wherein, the physical layer parameter may include one of following parameter or combination:
TxAntennaSelectionSupported (representing transmission antenna selective power), SpecificRefSigsSupported (tables
Show support specific reference signals ability), enhancing bilayer TDD (Time Division Duplexing, time division duplex), be directed to
PUCCH (Physical Uplink Control Channel, physical uplink control channel) two antenna ports, tm9-
With-8Tx-FDD (represent support FDD 8 antennas), pmi-Disabling (representing disabling PMI), across carrier frequency scheduling, parallel
PUCCH-PUSCH (Physical Uplink Shared Channel, physical uplink link shared channels) etc..
Step 2:Local eNB are received after request message is set up in carrying and are carried out call access control, and in the feelings for agreeing to receive
Under condition, request message is set up for corresponding UE (sets up the AP ID or C-RNTI that are carried in request message with carrying according to the carrying
Corresponding UE) distribution private resource, and reply carrying set up response (Bear Setup Response) message give macro eNB,
The identification information and local eNB for including the UE in the response message are the dedicated resource information of UE distribution.
Specifically, specifically, carrying is set up in response message including but not limited to following information:
The AP ID of interface, for unique mark UE on local eNB, are distributed by local eNB;
E-RAB ID, for one E-RAB of unique mark;
Transport Layer address of the local eNB for each E-RAB;
Local eNB are the dedicated resource information of UE distribution.
Wherein, local eNB are that the dedicated resource information that UE is distributed may include one of following information or combination:
Each separates the PDCP configuration informations for carrying (when the PDCP/RLC/MAC/PHY of UE all or parts DRB needs to keep
Needed when on local eNB comprising the configuration information);
Each separates the RLC configuration informations for carrying, wherein comprising up-downgoing AM (affirmation mode) or UM (Unacknowledged Mode)
Parameter etc.;
Logic Channel Identifier, the logic channel of the UE is directed to for unique mark local eNB;
Logic channel is configured, and specifically includes priority, PBR (Prioritized Bit Rate, preferential stage speed) or BSD
Parameters such as (Bucket Size Duration);
MAC configuration informations, specifically include one of following information or combination:BSR (Buffer Status Report, buffering
Zone state report), PHR (physical layer frame head), DRX (discontinuous reception), SPS (semi-continuous scheduling) isoparametric configuration;
PCell and SCell configuration informations under local eNB, optionally, can also carry cell type (allow and
It is different that macro eNB are indicated);
Proprietary physical layer configurations information, specifically includes one of following information or combination:PDSCH(Physical Downlink
Shared Channel, physical down link sharing channel) it is proprietary configuration, the proprietary configurations of PUCCH, the proprietary configurations of PUSCH, up
The proprietary configuration of Power Control, SoundingRS (are used for the RS (Reference Signal, reference signal) of channel measurement, also referred to as
Be SRS) up proprietary configuration, CQI (Channel Quality Indicator, CQI) report configuration, TPC-
PDCCH (transimission power of PDCCH, wherein PDCCH are the english abbreviations of Physical Downlink Control Channel,
Chinese is expressed as Physical Downlink Control Channel) configuration etc.;
RACH (Random Access Channel, RACH) proprietary configuration information, specifically includes Stochastic accessing
Preamble (pilot tone) is indexed, or/and RACH Mask (mask) indexes.
Step 3:Macro eNB are received after the carrying sets up response message, are organized and are sent RRC connections and reconfigure (RRC
Connection Reconfiguration) message, to notify that corresponding UE performs chain of command and user plane lock out operation.The message
In include local eNB be the UE configuration private resource, and local cell public resource configuration etc. information.Its
In, response message, the public resource configuration and measurement of local cell are set up in the carrying of the private resource from step 3 of the UE
Configuration is configured by macro eNB.
Specifically, the public resources of local cell that are configured of macro eNB can including but not limited to following part or
Person's full detail:
RACH or/and PRACH (Physical Random Access Channel, Physical Random Access Channel) is public matches somebody with somebody
Confidence ceases;
PDSCH common configuration informations;
PUSCH common configuration informations;
PHICH (Physical Hybrid ARQ Indicator Channel, physics HARQ (Hybrid Automatic
Repeat Request, hybrid automatic repeat-request) indicate channel) configuration information;
PUCCH common configuration informations;
SoundingRS common configuration informations;
Antenna configuration information;
P-Max (maximum transmission power);
TDD physical channel configuration informations;
The information such as uplink cycle prefix length.
Step 4:After local eNB receive the synchronization message from separate user equipment, sent to macro eNB and carried
Activation indicates (Bear Active Indication) message.This step is optional.
Step 5:After corresponding UE completes RRC connection reconfiguration operations, return to RRC connections to macro eNB and reconfigure completion
(RRC Connection Reconfiguration Complete) message.
UE call access controls can also be realized that in such cases, macro eNB are in judgement local cell by macro eNB
In the case of UE being received, send carrying to the local cell and set up request message, other processing procedures and above-mentioned flow
It is similar.
As shown in Figure 10, if macro eNB determine the carrying that modification has been set up, below scheme is performed:
Step 1:Macro eNB send bearing modification request (Bear Modify Request) message and give local eNB,
The context id information of UE is carried in the request message, such as AP ID also include following letters in bearing modification request message
One of breath or combination:
The increased E-RAB information group of institute;
Need the E-RAB information groups deleted;
Need the E-RAB information groups of modification.
Wherein, include the E-RAB ID marks for newly increasing in increased E-RAB information group, can also include macro
ENB is directed to transport Layer address or/and corresponding qos parameter (such as QCI or ARP parameters) of the E-RAB etc.;Need the E- of modification
Include the E-RAB ID that the user to be changed carries, the qos parameter (such as QCI or ARP parameters) of renewal in RAB information groups
Deng;Need to include the E-RAB ID that the user to be deleted carries in the E-RAB information groups deleted.
Step 2:Local eNB change corresponding UE according to the bearing modification request message for receiving (i.e. please with bearing modification
Seek the corresponding UE of AP ID carried in message) private resource, and organize and send bearing modification response (Bear Modify
Response) message gives macro eNB, wherein the identification information of UE is carried, such as AP ID of interface.
If comprising increased E-RAB information group in bearing modification request message, local eNB are according to the information
Group, is respective carrier distribution UE private resources, and return to the bearing modification response message for carrying corresponding E-RAB information group.Should
In E-RAB information groups in response message, corresponding to each E-RAB for newly increasing therein, include but be not limited to following letter
Breath:E-RAB ID, and local eNB are for the transport Layer address of each E-RAB, dedicated resource information, wherein described special
Resource information includes one of following information or combination:PDCP configuration informations (the PDCP/RLC/MAC/ of UE all or parts DRB
PHY need to be comprising the configuration information when need to be maintained on local eNB), RLC configuration informations, Logic Channel Identifier, logic channel match somebody with somebody
Put, MAC configuration informations and proprietary physical layer configurations information etc. can also be included.
If the E-RAB information groups comprising modification in need in bearing modification request message, local eNB are according to the letter
Breath group, is the respective carrier modification UE private resources of corresponding UE, and returns to the bearing modification sound for carrying corresponding E-RAB information group
Answer message.In E-RAB information groups in the response message, corresponding to each amended E-RAB therein, include following letter
Breath:E-RAB ID and amended dedicated resource information, the amended dedicated resource information include one of following information
Or combination:PDCP configuration informations (are needed when the PDCP/RLC/MAC/PHY of UE all or parts DRB need to be maintained on local eNB
Comprising the configuration information), RLC configuration informations, Logic Channel Identifier, logic channel configuration etc., MAC configuration informations can also be included
With proprietary physical layer configurations information etc..
If the E-RAB information groups comprising deletion in need in bearing modification request message, local eNB are according to the letter
Breath group, deletes the private resource of the respective carrier of corresponding UE, and returns to the bearing modification response for carrying corresponding E-RAB information group
Message.In E-RAB information groups in the response message, corresponding to each deleted E-RAB therein, include E-RAB
ID。
Additionally, also carrying carrier type configuration information in the bearing modification response message.
Step 3:Macro eNB are received after the carrying sets up response message, are organized and are sent RRC connections and reconfigure (RRC
Connection Reconfiguration) message, to notify that corresponding UE performs DRB reconfiguration operations.Can contain in the message
There are the DRB private resources that UE is reconfigured on local eNB, optionally, can also be comprising resource reconfigured on macro eNB etc.
Information.Wherein, bearing modification response of the DRB dedicated resource informations that the UE is reconfigured on local eNB from step 2 disappears
Breath.
Step 4:After corresponding UE completes RRC connection reconfiguration operations, return to RRC connections to macro eNB and reconfigure completion
(RRC Connection Reconfiguration Complete) message.
As shown in figure 11, if local eNB determine modification UE MAC or the proprietary configuration information of physical layer, perform with
Lower flow:
Step 1:Local eNB send bearer update request (Bear Modify Request) message and give macro eNB,
The context id information of UE, such as AP ID are carried in the request message.Optionally, suggestion can also be carried in the request message
MAC configurations and proprietary physical layer configurations change information etc..
Step 2:Macro eNB organize and send bearer update response (Bear Modify Response) message to give
local eNB.This step is optional.
Step 3:Macro eNB are organized and are sent RRC and reconfigure (RRC Connection Reconfiguration) and disappear
Breath, to notify that corresponding UE (UE i.e. corresponding with the AP ID carried in bearer update request message) performs reconfiguration operation.This disappears
MAC layer or physical layer Proprietary Information that UE is reconfigured on local eNB can be included in breath, optionally, can also be included
The information such as the resource reconfigured on macro eNB.
Step 4:After corresponding UE completes RRC connection reconfiguration operations, return to RRC connections to macro eNB and reconfigure completion
(RRC Connection Reconfiguration Complete) message.
As shown in figure 12, if macro eNB determine to delete that UE, in the context of local eNB, performs below scheme:
Step 1:Macro eNB send deleting load-bearing (Bear Delete Request) message and give local eNB, and this disappears
The context id information of UE, such as AP ID are carried in breath.
Step 2:Local eNB organize and send deleting load-bearing response (Bear Delete Response) message to give
macro eNB.This step is optional.
Step 3:Macro eNB are organized and are sent RRC connections and reconfigure (RRC Connection
Reconfiguration) message, to notify that corresponding UE (UE i.e. corresponding with the AP ID carried in deleting load-bearing message) performs
DRB deletion actions, can indicate that delete UE reconfigures in all resources and macro eNB on local eNB in message
The information such as resource.
Step 4:After corresponding UE completes corresponding deletion action, return to RRC connections to macro eNB and reconfigure completion (RRC
Connection Reconfiguration Complete) message.
By above description as can be seen that the embodiment of the present invention carries out the configuration of UE private resources and pipe by local eNB
Reason so that the user plane of UE can be separated to local eNB, reduces the number of times that UE is controlled face switching, reduces UE and falls
Words probability.
Based on identical technology design, the embodiment of the present invention additionally provides a kind of macro base station equipment (macro described above
eNB)。
It is the structural representation of base station equipment provided in an embodiment of the present invention referring to Figure 13, the equipment may include to receive mould
Block 1301, resource distribution indicating module 1302, can also further include sending module 1303, wherein:
Receiver module 1301, the user's dedicated resource information for receiving home base stations configuration;
Resource distribution indicating module 1302, for the user's dedicated resource information for configuring the home base stations, Yi Jisuo
The local public resource information of macro base station configuration is stated, respective user equipment is sent to, to indicate the respective user equipment to carry out
Resource distribution.
When this equipment determines to be controlled user equipment in face and user plane separation, sending module 1303 is to home base stations
Send carrying and set up request message.Accordingly, receiver module 1301 receives the carrying that the home base stations return and sets up response and disappears
Breath, wherein carrying user's dedicated resource information that the home base stations are the user equipment allocation;Resource distribution indicates mould
Block 1302 sends RRC connection reconfiguration messages to the user equipment that the face that is controlled and user plane are separate, wherein carrying described
Home base stations are configured to user's dedicated resource information of the user device configuration, and macro base station configuration is local public
Resource information.Wherein, the content of request message is set up in the local public resource information of the macro base station configuration, the carrying, with
And the content for setting up response message is carried, as previously described.
When this equipment determines that the built user stood on home base stations of modification carries, sending module 1303 is to described local
Base station sends bearing modification request message.Accordingly, receiver module 1301 is additionally operable to receive the carrying that the home base stations are returned
Modification response message, wherein carrying user's private resource that the home base stations are distributed according to the bearing modification request message
Information;Resource distribution indicating module 1302 is additionally operable to carry the user equipment changed to user and send RRC connections and reconfigure disappear
Breath, wherein carrying user's dedicated resource information of the home base stations configuration.Wherein, the bearing modification request message is interior
Hold, and the bearing modification response message content, be the same as those described above.
After the MAC layer or the proprietary configuration information of physical layer of home base stations modification user equipment, send bearer update request and disappear
Breath.Accordingly, receiver module 1301 is additionally operable to receive the bearer update request message that home base stations send, wherein carrying
The Context identifier of the user equipment, and the MAC layer configuration of suggestion changes information with proprietary physical layer configurations.Accordingly,
Resource distribution indicating module 1302 is additionally operable to be sent to the user equipment for being modified MAC layer or the proprietary configuration information of physical layer
RRC connects reconfiguration message, wherein the MAC layer configuration for carrying the home base stations suggestion is more converted to proprietary physical layer configurations
Breath.
When this equipment determines that deleting user of the user equipment on home base stations carries, sending module 1303 be additionally operable to
The home base stations send deleting load-bearing message, wherein carrying the context id information of the user equipment.Accordingly, provide
The user equipment that source configuration indicating module 1302 is additionally operable to be carried to deleted user sends RRC connection reconfiguration messages, wherein
Carry the information for indicating all resources for deleting the user equipment on home base stations.
Through the above description of the embodiments, those skilled in the art can be understood that the present invention can be by
Software adds the mode of required general hardware platform to realize, naturally it is also possible to which by hardware, but the former is more in many cases
Good implementation method.Based on such understanding, what technical scheme substantially contributed to prior art in other words
Part can be embodied in the form of software product, and the computer software product is stored in a storage medium, if including
Dry instruction is used to so that a station terminal equipment (can be mobile phone, personal computer, server, or network equipment etc.) performs sheet
Invent the method described in each embodiment.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
Depending on protection scope of the present invention.