CN102088793B - Network access method and system - Google Patents
Network access method and system Download PDFInfo
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- CN102088793B CN102088793B CN 200910188631 CN200910188631A CN102088793B CN 102088793 B CN102088793 B CN 102088793B CN 200910188631 CN200910188631 CN 200910188631 CN 200910188631 A CN200910188631 A CN 200910188631A CN 102088793 B CN102088793 B CN 102088793B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/002—Transmission of channel access control information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
Abstract
The invention discloses a network access method and system. The method comprises the following steps of: acquiring a preamble identification associated with a cell identification of a cell by user equipment when the user equipment enters the cell or is started in the cell; sending random access preamble information to a network, wherein the preamble identification associated with the cell identification is carried in the random access preamble information; and receiving a random access response returned by the network. By virtue of the method, indexes of random access delay and switching delay can meet the communication requirements on the situation of traffic field.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of method and system of access network.
Background technology
Development along with wireless communication technology, the user is more and more higher for the demand of wireless traffic, in order to satisfy the demand that service transmission rate is faster, time delay is shorter, frequency band is wider, next generation network (Next Generation Network), for example LTE (Long Term Evolution, Long Term Evolution) technology is arisen at the historic moment.
LTE is as 3G (Third Generation, 3G (Third Generation) Moblie) evolution of technology, it improves and has strengthened the aerial access technology of 3G, layout along with the LTE network, following network operation environment becomes increasingly complex, and reduces networking price key factor and be to improve the availability of frequency spectrum, simplified network structure, the wireless base station is provided more cheaply and strengthens maintainable function etc.
LTE is with the access technology (E-UTRA of evolution, Evolved-Universal Terrestrial RadioAccess, Evolved-UTRA) and evolution accessing network (E-UTRAN, Evolved-UniversalTerrestrial Radio Access Network), provide better support for operator and the ever-increasing demand of user.
In the LTE system, the base station is eNodeB (Evolved NodeB, evolution base station can be called for short eNB), for reaching the simplified signaling flow process, shorten the purpose that postpones, E-UTRAN has given up the RNC (Radio Network Controller, radio network controller) of universal land radio access web (UTRAN, Universal Terrestrial Radio AccessNetwork)-NodeB structure, be comprised of eNodeB (base station) fully, topology of networks is seen Fig. 1.
As shown in Figure 1, in E-UTRAN, between eNB, bottom adopts the IP transmission, logically is connected to each other by X2 interface or other interface (for example S1 interface), forms Mesh type network, also claims wireless mesh network, wireless mesh network etc.Such network configuration is mainly used in the mobility of support terminal (UE, User Equipment) in whole network, guarantees user's seamless switching.And each eNB connects by S1 interface and IAD (AGW, Access Gateway).An AGW can interconnect with a plurality of eNB.
The content of the standard agreement of LTE definition is mainly for ordinary terminal and general communication network, for the requirement of performance index all for domestic consumer.But at some special application scenarioss, for example, field of traffic, especially high-speed transit field, railway for example, highway, subway and high-speed railway etc., wherein, implication at a high speed need to be decided the definition of vehicle speed according to various countries, and for example, the highway General Requirements minimum speed of China is 80 kilometers/hour, 120 kilometers/hour of the high-speed railway General Requirements of China, etc.For example when the LTE network was used to the communication of high-speed railway, due to the difference of application scenarios, the relatively common telecommunications scene of traffic scene can increase some restrictive conditions, can reduce some restrictive conditions again simultaneously.
For example, in railway or high ferro scene, the LTE terminal part is deployed on the compartment, the LTE base station deployment along the railway, the LTE base station only provides access service for the terminal of the special use on train, whole network is the private network of a railway communication, has the following characteristics.
1) whole network is a railway private network, can follow the consensus standard of LTE fully.
2) due to LTE network carrying train to the communication carrier on ground, to the requirement of time delay higher than standard agreement.
3) number of users of each residential quarter is considerably less, and for example, general maximum four users that have, i.e. each UE of a row train headstock and the tailstock, the train that two row travel in opposite directions amount to four users during simultaneously through a residential quarter, seldom can lack the situation of inadequate resource.
Except Physical Random Access Channel (PRACH, Physical Random Access Channel) outside, UE sends any data all needs network to allocate uplink transmission resource in advance, after UE carries out random access procedure, obtain the uplink transmission resource (UL garnt) of network allocation, UE just can carry out the transport service of upstream data.Data need a period of time by the transmission of eating dishes without rice or wine, UE sends upstream data must shift to an earlier date a period of time transmission, make data arrive network in predetermined time, in the middle of the process of random access, UE can obtain up transmitting time lead (TA, Time alignment) to reach uplink synchronous.Random access makes the state of UE be transitted towards connected state from Idle state, thereby carries out the downlink data transmission business.Random access makes the acquisition uplink synchronous of UE under the scenes such as initial access, switching, uplink loss, obtains uplink transmission resource, makes the state of UE be transitted towards connected state from Idle state.
For example, as shown in Figure 2, the schematic flow sheet for UE access EUTRAN in prior art comprises following content.
Step 200, UE selects Preamble ID and transmitted power;
Step 201, UE sends random access guiding (Random AccessPreamble) to EUTRAN;
Step 202, UE receives the accidental access response (Random AccessResponse) that EUTRAN returns;
Step 203, UE sends to connect to EUTRAN and sets up solicited message;
Step 204, Contention message is set up in the connection that UE reception EUTRAN returns.
But in prior art, random access delay and handover delay index can not satisfy the communicating requirement under the field of traffic scene fully.
Summary of the invention
An aspect of of the present present invention provides a kind of method of access network, a kind of subscriber equipment, and a kind of base station and communication system make random access delay and handover delay index satisfy communicating requirement under the field of traffic scene.
An aspect of of the present present invention provides a kind of method of access network, comprising:
When subscriber equipment entered the residential quarter or start in this residential quarter, subscriber equipment obtained the lead flag related with the cell ID of this residential quarter;
Send random access guiding information to network, wherein, described this random access guiding information is carried the lead flag related with cell ID of described acquisition;
Receive the accidental access response that described network returns.
Another aspect of the present invention provides a kind of method of accepting user access network, comprising:
When subscriber equipment enters the residential quarter or start in this residential quarter, send the lead flag related with the cell ID of this residential quarter to subscriber equipment;
Receive the random access guiding information that subscriber equipment sends, wherein, described this random access guiding information is carried the lead flag of described cell ID association;
Send accidental access response to described subscriber equipment.
Another aspect of the present invention provides a kind of subscriber equipment, comprising:
Acquiring unit is used for obtaining the lead flag related with the cell ID of this residential quarter when described subscriber equipment enters the residential quarter or start in this residential quarter;
Transmit-Receive Unit is used for sending random access guiding information to network, and wherein, described this random access guiding information is carried the lead flag related with cell ID of described acquisition; Receive the accidental access response that described network returns.
Another aspect of the present invention provides a kind of base station, comprising:
Memory cell is for the related information of storage cell ID and lead flag;
Transmit-Receive Unit is used for sending the lead flag related with the cell ID of this residential quarter to subscriber equipment when subscriber equipment enters the residential quarter or start in this residential quarter; Receive the random access guiding information that described subscriber equipment sends, wherein, described this random access guiding information is carried the lead flag of described cell ID association; Send accidental access response to described subscriber equipment.
Another aspect of the present invention provides a kind of communication system, comprising:
The base station is for the related information that cell ID and lead flag are set; When subscriber equipment enters the corresponding residential quarter of described cell ID or start in this residential quarter, send the related information of described cell ID and lead flag to described subscriber equipment; Receive the random access guiding information that described subscriber equipment sends, described random access guiding information is carried described lead flag, and sends the random access guiding response message to described subscriber equipment.
The technical scheme of foregoing description makes random access delay and handover delay index satisfy communicating requirement under the field of traffic scene.
Description of drawings
Fig. 1 is a kind of LTE schematic network structure in prior art;
Fig. 2 is the schematic flow sheet of UE access EUTRAN in prior art;
Fig. 3 is the structural representation of a kind of transportation network of one embodiment of the invention;
Fig. 4 is the method flow schematic diagram of a kind of Network with Random Multiple Access System of another embodiment of the present invention;
Fig. 5 is the method flow schematic diagram of the access network that starts of a kind of UE of another embodiment of the present invention;
Fig. 6 is the method flow schematic diagram of access network in a kind of UE handoff procedure of another embodiment of the present invention;
Fig. 7 is the structural representation of a kind of communication system of another embodiment of the present invention;
Fig. 8 is the method flow schematic diagram of access network in the another kind of UE handoff procedure of another embodiment of the present invention;
Fig. 9 is the structural representation of the another kind of communication system of another embodiment of the present invention;
Figure 10 is the structural representation of the another kind of communication system of another embodiment of the present invention.
Embodiment
In below describing, in order to illustrate rather than in order limiting, to have proposed the detail such as particular system structure, interface, technology, understand the present invention in order to thoroughly cut.Yet, not it will be clear to one skilled in the art that in there is no other embodiment of these details and can realize the present invention yet.In other cases, omit the detailed description to well-known device, circuit and method, in order to avoid unnecessary details hinders description of the invention.
The mode of user equipment (UE) Network with Random Multiple Access System generally has two types: competition Random Access and non-competing random access.
The triggering of the random access of competition can occur in following certain situation.
UE controls _ idle (RRC_IDLE from Radio Resource, when Radio Resource Control-IDLE) state is transformed into Radio Resource control _ connection status (RRC_CONNECTED) state, trigger initial random access from radio resource control layer (rrc layer).
UE is in when (RRC_CONNECTED) state is controlled _ connected to Radio Resource and occurs in radio jink failure (radio link failure) situation, triggers random access from rrc layer.
UE switches in process, triggers random access from rrc layer.
UE receives downlink data the uplink loss situation occurs simultaneously under the RRC_CONNECTED state, initiate random access (and satisfy Timing Advance TA timer expiry) from medium access control (MAC, Media Access Control) layer.
when UE has upstream data to send under the RRC_CONNECTED state, comprising two kinds of scenario triggered accesses at random, a kind of is that uplink loss occurs, trigger random access from media access control layer or rrc layer, another kind is there is no available uplink shared channel (PUSCH, Physical Uplink Shared Channel) and physical uplink control channel (PUCCH, Physical Uplink Control Channel) carrying dispatch request (SR, Scheduling request) in situation, trigger random access procedure from the MAC layer, complete the transmission to dispatch request SR.
The triggering of non-competing random access can occur in following certain situation.
In handoff procedure, trigger non-competing solution random access procedure from rrc layer.
When downlink data arrives and in the uplink loss situation, initiate non-competing solution random access procedure from the MAC layer.
The present invention is mainly used in the transportation network field, railway for example, highway, subway and high-speed railway etc.
When network configuration, the cell ID (Cell ID) and at least one lead flag (Preamble ID) incidence relation of each residential quarter are set, and this incidence relation is stored in certain entity of network, be stored in entities such as eNB in network such as the form with form, certainly, can be stored in other mode in network in other network entity, the present invention does not limit yet.
Wherein, the Cell ID of described each residential quarter need to be related with what Preamble ID, the present invention does not limit, can decide according to the quantity of the vehicles and the terminal quantity of configuration, for example in railway or high-speed railways, pass through simultaneously the train of certain residential quarter, at least one row can be, for example row, two row can be, three row, four row etc. and in railway or high-speed railways, are generally that headstock and the tailstock at a row train respectively configures a terminal, so the Cell ID of each residential quarter can be related with 2,4,6,8 Preamble ID respectively.Certainly, as required, can configure one or at least three terminals on a row train, the present invention does not limit yet.In addition, pass through simultaneously the quantity of the train of certain residential quarter, the present invention does not limit yet.Also for example, in the communication system of highway, the automobile that passes through simultaneously certain residential quarter also can be at least one, also can configure at least one terminal on each automobile.The configuration of other field of traffic is similar, does not repeat them here.
As shown in Figure 3, be a kind of traffic communication system of one embodiment of the invention, this system comprises Access Network (for example E-UTRAN) and at least one user equipment (UE) that communicates with connection, wherein, this Access Network comprises at least one base station, and for example E-UTRAN comprises at least one eNode B.Wherein, eNode B passes through the Uu interface communication each other by X2 interface communication between eNode B and UE.
As shown in Figure 4, be the method flow schematic diagram of a kind of Network with Random Multiple Access System of another embodiment of the present invention, in conjunction with Fig. 3 and Fig. 4, the method can be as described below.
Step 301, user equipment (UE) is from the Network Capture Preamble ID related with Cell ID.
For example, subscriber equipment receives the cell ID of described network transmission and the related information of lead flag; Resolve the related information of described cell ID and lead flag; Obtain the described lead flag related with cell ID according to analysis result.
For example, when UE enters the residential quarter, detect the Cell ID of this residential quarter.
If UE starts in residential quarter corresponding to described Cell ID, enter idle condition after starting, E-UTRAN by system message will be related with Cell ID Preamble ID send to UE, for example increase the cell of a Cell ID and Preamble ID related information in system message 2 (SIB2 message), when the eNB of E-UTRAN sends SIB2 message to UE, carry the cell of this Cell ID and PreambleID related information.UE obtains the Preamble ID related with Cell ID by resolving the cell of this CellID and Preamble ID related information.
if UE enters residential quarter (being designated as Target cell) corresponding to described Cell ID by switching, UE obtains the Preamble ID related with Cell ID by switching command from E-UTRAN, for example the source base station eNB in this E-UTRAN sends the RRC connection reallocation message (RRCConnectionReconfiguration message) of carrying Target cell Preamble ID to UE, for example connect at RRC and increase the Preamble id information related with Target cell Cell ID in the neighboring BS information that carries in mobility control information (mobilityControlInfo) cell of reallocation message.UE connects reallocation message by resolving this RRC, obtains the Preamble ID related with the Cell ID of Target cell.
Wherein, the base station that UE belongs to before switching is commonly referred to as source base station, and the base station that UE belongs to after switching is commonly referred to as target BS; The residential quarter that UE switches front place is commonly referred to as the cell-of-origin, and after UE switches, the residential quarter at place is commonly referred to as Target cell.
Wherein, this random access guiding information is carried the Preamble ID related with Cell ID that described UE obtains.
For example, UE sends random access guiding information to eNB on certain subframe, for example, eNodeB is handed down to UE by RRC message with the configuration parameter of Physical Random Access Channel (PRACH), the rrc layer of UE passes to the MAC layer by interlayer message with these parameters, and the MAC layer obtains to send on that subframe according to these calculation of parameter after these parameters.UE starts receiving random access response (RAR, Random Access Response) timer, if timer expiry, UE does not receive that RAR retransmits described random access guiding information, if reach maximum number of retransmissions, the RRC to E-UTRAN sends access failure message, and state is set to the free time (Idle).
In another embodiment of the present invention, after the CellID that the base station of subscriber equipment reception E-UTRAN sends and the related information of Preamble ID, can select corresponding lead flag according to preset strategy, different subscriber equipmenies can be according to the default different Preamble ID of policy selection.
In another embodiment of the present invention, described subscriber equipment is selected corresponding lead flag according to user ID with the corresponding relation of lead flag.For example, preserve the correspondence relationship information of user ID and lead flag in subscriber equipment, after the Cell ID that the base station of subscriber equipment reception E-UTRAN sends and the related information of Preamble ID, according to the correspondence relationship information of described user ID and lead flag, select corresponding lead flag.
In another embodiment of the present invention, subscriber equipment is preserved user ID, the direction of motion information of subscriber equipment and the correspondence relationship information of lead flag, described subscriber equipment is according to this user ID, and the direction of motion information of subscriber equipment is selected corresponding lead flag with the correspondence relationship information of lead flag.For example, described subscriber equipment obtains the train direction of travel information by the train control system interface with train, utilizes the train direction of travel information, and different subscriber equipmenies is selected different Preamble ID.For example, during related four lead flags of a cell ID (Cell ID) (Preamble ID), if train moves from place A to place B, after the Cell ID that the base station of subscriber equipment reception E-UTRAN sends and the related information of Preamble ID, user ID (UE ID) is selected first Preamble ID for the subscriber equipment of odd number; UE ID is that the subscriber equipment of even number is selected second Preamble ID.Again for example, if train moves from place B to place A, UE ID is the 3rd Preamble ID of subscriber equipment selection of odd number; UE ID is that the subscriber equipment of even number is selected the 4th PreambleID.
Step 303, UE receives the accidental access response (RAR, RandomAccess Response) that E-UTRAN returns.
If UE successfully is resolved to RAR, expression accesses successfully at random.
By above-mentioned description as can be known, UE need not carry out Preamble again and select, and has reduced UE inter-process time delay, for example is approximately 5 milliseconds (ms); Further, because UE carries the Preamble ID related with Cell ID to the random access guiding information that E-UTRAN sends, reduced the process of the mutual Preamble ID of UE and E-UTRAN and UE ID, reduce the handling process of eating dishes without rice or wine twice, can greatly reduce time of delay, for example approximately can reduce 15 milliseconds (ms).
Be the convenience of describing, following embodiment all describes as an example of the railway system example, suppose that same residential quarter has at most two row trains to pass through simultaneously, and every row train is two terminals of configuration at most, be that each CellID is related with 4 Preamble ID, other situation can the like, do not repeat them here.
Followingly describe the process of accessing terminal to network as example take starting terminal and terminal switching cell respectively, but the present invention does not limit the application of other scenes, for example re-accesses, other scenes can adopt technical scheme of the present invention equally.
As described in Figure 5, be the method flow schematic diagram of a kind of Network with Random Multiple Access System of another embodiment of the present invention, the process of access network after the present embodiment is described UE and started.
Step 400, UE starts, and obtains the Preamble ID related with Cell ID by system message from E-UTRAN.
In certain residential quarter, UE starts, enter idle condition (Idle state) after starting, E-UTRAN by system message will be related with Cell ID Preamble ID send to UE, for example increase the cell of a Cell ID and Preamble ID related information in system message 2 (SIB2 message), when the eNB of E-UTRAN sends SIB2 message to UE, carry the cell of this Cell ID and Preamble ID related information.UE obtains the Preamble ID related with Cell ID by resolving the cell of this Cell ID and Preamble ID related information.
Step 401, UE sends random access guiding (Random AccessPreamble) to the eNB of LTE network.
Wherein, this random access guiding information is carried the Preamble ID related with Cell ID that described UE obtains.
UE after scheduling according to relevant parameter, send random access guiding to eNB on certain subframe, for example, eNodeB is handed down to UE by RRC message with the configuration parameter of Prach channel, the rrc layer of UE passes to the MAC layer by interlayer message with these parameters, and the MAC layer obtains to send on that subframe according to these calculation of parameter after these parameters.UE starts the overtime timer that receives RAR, if timer expiry UE does not receive RAR, UE retransmits described random access guiding, if reach maximum number of retransmissions, sends access failure message to eNB, and current state is set to Idle.
In another embodiment of the present invention, after the CellID that the base station of subscriber equipment reception E-UTRAN sends and the related information of Preamble ID, can select corresponding lead flag according to preset strategy, different subscriber equipmenies can be according to the default different Preamble ID of policy selection.
In another embodiment of the present invention, described subscriber equipment is selected corresponding lead flag according to user ID with the corresponding relation of lead flag.For example, preserve the correspondence relationship information of user ID and lead flag in subscriber equipment, after the Cell ID that the base station of subscriber equipment reception E-UTRAN sends and the related information of Preamble ID, according to the correspondence relationship information of described user ID and lead flag, select corresponding lead flag.
In another embodiment of the present invention, preserve user ID in subscriber equipment, the direction of motion information of subscriber equipment and the correspondence relationship information of lead flag, described subscriber equipment is according to this user ID, the direction of motion of subscriber equipment is selected corresponding lead flag with the corresponding relation of lead flag, detailed process can be described accordingly with reference to figure 4 embodiment, does not repeat them here.
Step 402, UE receives the accidental access response (RAR, Random AccessResponse) that E-UTRAN returns.
For example, this accidental access response carries Timing Advance TA, and UE stops receiving the RAR overtime timer after receiving the RAR of eNB transmission, and resolves RAR; If the Preamble ID that parsing is obtained and the Preamble ID of transmission are complementary.
As described in Figure 6, be the method flow schematic diagram of a kind of Network with Random Multiple Access System of another embodiment of the present invention, the present embodiment is described the process of access network in the UE handoff procedure.
Step 500, the handover request message that UE reception sources eNB sends is obtained the Preamble ID related with the CellID of Target cell.
Wherein, this handover request message is carried the Preamble id information of Target cell, and this Preamble ID is related with the Cell ID of Target cell.For example, when UE switches into the residential quarter, connect at RRC the Preamble id information that increases Target cell in the neighboring BS information that carries in the mobility control information (mobilityControlInfo) of reallocation message (RRCConnectionReconfiguration message), the source eNB of cell-of-origin connects reallocation message with this RRC and sends to UE.
Step 501, UE sends random access guiding information (RandomAccess Preamble) to the target eNB of Target cell.
Wherein, this random access guiding information is carried the Preamble ID related with Cell ID that described UE obtains.
For example, UE sends random access guiding information to target eNB on certain subframe, for example, eNodeB is handed down to UE by RRC message with the configuration parameter of Prach channel, the rrc layer of UE passes to the MAC layer by interlayer message with these parameters, and the MAC layer obtains to send on that subframe according to these calculation of parameter after these parameters.UE starts receiving random access response (RAR, Random Access Response) timer, if timer expiry, UE does not receive that RAR retransmits described random access guiding information, if reach maximum number of retransmissions, the RRC to E-UTRAN sends access failure message, and state is set to the free time (Idle).
In another embodiment of the present invention, after the CeUID that the base station of subscriber equipment reception E-UTRAN sends and the related information of Preamble ID, can select corresponding lead flag according to preset strategy, different subscriber equipmenies can be according to the default different Preamble ID of policy selection.
In another embodiment of the present invention, described subscriber equipment is selected corresponding lead flag according to user ID with the corresponding relation of lead flag.For example, preserve the correspondence relationship information of user ID and lead flag in subscriber equipment, after the Cell ID that the base station of subscriber equipment reception E-UTRAN sends and the related information of Preamble ID, according to the correspondence relationship information of described user ID and lead flag, select corresponding lead flag.
In another embodiment of the present invention, described subscriber equipment can also be according to user ID, and the direction of motion of subscriber equipment is selected corresponding lead flag with the corresponding relation of lead flag, and detailed process can be described accordingly with reference to figure 4 embodiment, does not repeat them here.
The accidental access response that step 503, UE receiving target eNB return (RAR, RandomAccess Response).
If UE successfully is resolved to RAR, expression accesses successfully at random.
By above-mentioned description as can be known, UE need not carry out Preamble again and select, and has reduced UE inter-process time delay, for example is approximately 5 milliseconds (ms); Further, because UE carries the Preamble ID related with Target cell Cell ID to the random access guiding information that target eNB sends, reduced the process of the mutual Preamble ID of UE and target eNB and UE ID, reduce the handling process of eating dishes without rice or wine twice, can greatly reduce time of delay, for example approximately can reduce 15 milliseconds (ms).
As shown in Figure 7, be the structural representation of the transportation network of another embodiment of the present invention, this network can comprise: gateway 71, Mobility Management Entity 72, source base station 73, target BS 74 and subscriber equipment 75.For example, take the LTE network as example, gateway 71 is connected by the S11 interface with Mobility Management Entity 72, source base station 73 is connected with target BS and all is connected with gateway 71 and Mobility Management Entity 72 by the S1 interface, source base station 73 all is connected with subscriber equipment by the Uu interface with target BS 74, is connected by X2 interface between source base station 73 and target BS 74.The above-mentioned connection diagram of only describing the LTE system, the present invention can also be applied to other communication systems, and when this transportation network was other communication system, interface can be other interface type of communication standard definition.
As shown in Figure 8, for the transportation network cut-in method schematic flow sheet of another embodiment of the present invention, in conjunction with Fig. 7 and Fig. 8, a kind of transportation network cut-in method of the embodiment of the present invention is non-competing Random Access, mainly can be as described below.
Step 600, source base station (Source eNB) and gateway (Serving Gateway) are mutual, obtain region limits information (for example, area restrictions information).
For example, described source base station is setting up with gateway the region limits information of obtaining when linking, or described source base station is when upgrading current time lead TA, the region limits information of obtaining, and described region limits information is added in user's context (UE context).
Step 601, source base station is initiated user's measuring process according to described region limits information, source base station sends measuring command (for example, measurement control command) to subscriber equipment (UE), and described measuring process is conducive to control the connection mobility of subscriber equipment.
Step 602, UE is to source base station return measurement report (for example, Measurement Reports).
For example, UE is according to predetermined strategy, system information for example, and system parameters sends described measurement report to source eNB.
Step 603, source base station determines to carry out the switching of user equipment (UE) according to measurement report and RRM (RRM, Radio ResourceManagement) information.
Step 604, source base station sends handover request (for example, HO request, HANDOVER Request) to target BS (target eNB).
for example, source base station sends handover request to target BS, described handover request is carried some information that are used for switching, for example UE in the UE of source eNB X2 signaling context reference (for example, UE X2signalling context reference at source eNB), UE S1 interface EPC signaling context reference (for example, UE S1EPC signalling context reference), Target Cell Identifier (target cell ID), the key of eNB (KeNB*), Radio Resource is controlled context (RRC context), application server configuration information (AS-configuration, Application Server configuration), evolution RAB context (the E-RAB context of cell-of-origin, Evolved-Radio Access Bearercontext), the physical layer identifications of cell-of-origin (physical layer ID), the MAC entity is used for possible Radio Link Failure and (for example recovers, MAC for possible RLF recovery).
Wherein, Radio Resource control context comprises the residential quarter temporary mark (C-RNTI, Cell-Radio Network temporary Identity) when subscriber equipment is positioned at source base station.UE X2/UE S1 signaling can be so that target eNB can notification source eNB and evolution block core net (EPC, Evolved Packet Core) with reference to (for example, UE X2/UE S1 signalling references).The E-RAB context comprises necessary wireless network layer (RNL, Radio Network Layer) address information and the QoS information of transport network layer (TNL, Transport Network Layer) address information and E-RAB.
Step 605, target eNB are carried out access control (Admission Control).
For example, for increasing the success rate of switching, target eNB is carried out the access control operation according to the E-RAB QoSinformation that receives.For example, if target eNB is agreed to switch, target eNB is reserved residential quarter temporary mark C-RNTI and the required resource of optional Random Access Channel (RACH, Random Access Channel) leading (preamble) configuration according to the E-RAB QoS information that receives.
Wherein, the application server configuration information that is used for Target cell can be independent foundation, can be also according to the application server configuration information reprovision that is applied to the cell-of-origin.
Step 606, target eNB (for example: Handover RequestAck) is returned to switching response message to source eNB.
Target eNB utilizes L1/L2 to prepare to switch (Target eNB prepares HO with L1/L2), sends switching response message (for example, HANDOVER REQUEST ACKNOWLEDGEmessage) to source eNB.Described switching response message comprises be used to the transparent vessel that sends to subscriber equipment (transparent container), and this container is used for completing switching as RRC message.Described container comprises new residential quarter temporary mark C-RNTI, target eNB security algorithm sign (securityalgorithm identifiers), other some parameters, for example, access parameter (access parameters), system message (SIBs).Wherein, described target eNB security algorithm sign comprises special-purpose RACHpreamble.
Described switching response message also can comprise RNL/TNL information.
After sending switching command after source base station receives switching request response or from link, data are forwarded.
Step 607, source base station sends wireless resource control connection reconfiguration message (for example, RRCConnectionReconfiguration message) to subscriber equipment.
For example, target BS produces the radio resource control information (RRC message) that is used for completing switching, for example wireless resource control connection reconfiguration message (RRCConnectionReconfiguration message.Described wireless resource control connection reconfiguration message comprises mobility control information (mobilityControlInformation).Wherein, the Preamble id information of Target cell is carried in this mobility control information.
Described target BS sends to source base station with this radio resource control information, is transmitted to subscriber equipment by source base station.Source base station is completed integrity protection and the encrypted work of idle message necessity.
Subscriber equipment receives described wireless resource control connection reconfiguration message, described wireless resource control connection reconfiguration message comprises some parameters, for example: new C-RNTI, target BS security algorithm sign (security algorithm identifiers), the special-purpose RACH leading (optionallydedicated RACH preamble) of optional parameters, target eNB system message etc.).
Described subscriber equipment switches according to the command execution of source device, and disconnection is communicated by letter with source cell base station, is synchronized to new residential quarter.Subscriber equipment is carried out the backward source base station transmission of switching mixed automatic retransfer/autonomous retransmission and (for example: HARQ/ARQ responses) is responded.
Source base station releasing resource and to the target BS the transmission of data.
Step 608, source base station sends SN state transition message (for example SN STATUSTRANSFER message) to target BS.
For example, source base station sends SN state transition message to target BS, to transmit the up PDCP SN accepting state (uplink PDCP SN receiver status) of E-RABs and the descending PDCP SN transmission state (downlink PDCP SN transmitter status) of E-RABs to target BS.Wherein, described up PDCP SN accepting state comprises the PDCP SN of the first default UL SDU, can also comprise the position map information of the accepting state of UL SDUs sequence.If have any one described SDU, subscriber equipment retransmits this map information to target BS.The next PDCP SN of descending PDCP SN transmission state indication, target BS is not owing to there is no PDCP SN, so need to distribute new SDU.
If the E-RABs of subscriber equipment does not all preserve by the PDCP state and processes, source base station can not send described SN state transition message.
Step 609, subscriber equipment sends wireless resource control connection reconfiguration to target BS and completes message.
For example, after subscriber equipment successfully accesses Target cell, send to target BS that wireless resource control connection reconfiguration is completed message and up buffer status report is used for completing switching, wherein, this target BS sends wireless resource control connection reconfiguration and completes message and comprise C-RNTI.After the described C-RNTI of target BS checking, send data to subscriber equipment.
Step 610, target BS switches message (for example, PATH SWITCH message) to the mobile management entity MME transmit path, is used for notifying user equipment and has completed the residential quarter switching.
Step 611, described MME requests in person to gateway (Serving Gateway) transmission renewal user and asks message (for example UPDATE USER PLANE REQUEST message).
Step 612, gateway switching downlink data path is to target BS, send one or more termination sign (end marker) data, user's face of release connection source base station/TNL resource (U-plane/TNL resources) at original route to source base station.
Step 613, gateway send to MME upgrades user's face response message (for example UPDATEUSER PLANE RESPONSE message).
Step 614, MME is to target BS transmit path handover request ack message (PATH SWITCHACKNOWLEDGE message).
Step 615, target BS sends user's context release message (UE CONTEXTRELEASE message) to source base station.
For example, target BS sends the user's context release message to source base station after receiving the path switching response message that MME sends, and the described switching in notification source base station is success, and the trigger source base station is carried out resource and discharged.
Step 616, source base station are carried out resource and are discharged.
For example, after source base station received described user's context release message, source base station discharged the Radio Resource C-plane resource relevant with user's context.
The data exchange that is transmitting transmits to target BS.
By foregoing description as can be known, due to when switching, the Preamble id information of Target cell is carried in the mobility control information, and target BS arranges and preserve Target Cell Identifier (cell ID) and the incidence relation of Preamble ID, so subscriber equipment is during switching to the Target cell process from the cell-of-origin, subscriber equipment does not carry out synchronization, directly initiates RRC connection request process at Target cell, can save user's face handover delay.
As shown in Figure 9, be the structural representation of a kind of communication system of another embodiment of the present invention, this system can comprise subscriber equipment 91 and the base station 92 of mutual communication connection, and for example base station 92 can be eNB.Wherein subscriber equipment 91 may further include: detecting unit 910, and acquiring unit 911, resolution unit 913 and Transmit-Receive Unit 915, its course of work is mainly as described below.
When network configuration, base station 92 is related with a plurality of lead flags (Preamble ID) for the cell ID (Cell ID) that each residential quarter is set, and with the form storage of this incidence relation with mapping table.Certainly, can store in other mode, the present invention does not limit yet.
Wherein, the Cell ID of described each residential quarter need to be related with what Preamble ID, the present invention does not limit, can decide according to the quantity of the vehicles and the terminal quantity of configuration, for example in railway or high-speed railways, pass through simultaneously the train of certain residential quarter, at least one row can be, for example row, two row can be, three row, four row etc. and in railway or high-speed railways, are generally that headstock and the tailstock at a row train respectively configures a terminal, so the Cell ID of each residential quarter can be related with 2,4,6,8 Preamble ID respectively.Certainly, as required, can configure one or at least three terminals on a row train, the present invention does not limit yet.In addition, pass through simultaneously the quantity of the train of certain residential quarter, the present invention does not limit yet.Also for example, in the communication system of highway, the automobile that passes through simultaneously certain residential quarter also can be at least one, also can configure at least one terminal on each automobile.The configuration of other field of traffic is similar, does not repeat them here.
Described Transmit-Receive Unit 915 also is used for receiving the cell ID of described network transmission and the related information of lead flag;
Described resolution unit 913, for the related information of resolving described cell ID and lead flag, and the result that will resolve sends to described acquiring unit 915.
For example, when subscriber equipment 91 entered the residential quarter, detecting unit 910 was for detection of the CellID of this residential quarter.
If subscriber equipment 91 starts in residential quarter corresponding to this cell ID, enter idle condition after starting, base station 92 by system message will be related with Cell ID Preamble ID send to subscriber equipment 91, for example base station 92 increases the cell of a Cell ID and Preamble ID related information in system message 2 (SIB2 message), when base station 92 sends SIB2 message to UE, carry the cell of this Cell ID and Preamble ID related information.Transmit-Receive Unit 915, be used for receiving and describedly carry the system message 2 of this Cell ID and Preamble ID related information and be transmitted to described resolution unit 913, described resolution unit 913 is used for resolving this system message 2, obtains the Preamble ID related with Cell ID and is transmitted to described acquiring unit 911.
If subscriber equipment 91 is by switching the target approach residential quarter, Transmit-Receive Unit 915 92 sends switching commands to the base station, and wherein, base station 92 is source base station.For example this base station 92 sends the RRC connection reallocation message (RRCConnectionReconfiguration message) of carrying Target cell Preamble ID to UE, and for example base station 92 connects at RRC the Preamble id information that increases Target cell in the neighboring BS information that carries in mobility control information (mobilityControlInfo) cell of reallocation message.Transmit-Receive Unit 915 is used for receiving described RRC and connects reallocation message and be transmitted to described resolution unit 913; Described resolution unit 913 is used for resolving this RRC and connects reallocation message, obtains the Preamble ID related with Cell ID and is transmitted to described acquiring unit 911.
In another embodiment of the present invention, after the Cell ID of subscriber equipment 91 reception base station 92 transmissions and the related information of Preamble ID, subscriber equipment 91 can be selected corresponding lead flag according to preset strategy, and different subscriber equipmenies can be according to the default different Preamble ID of policy selection.
For example, described subscriber equipment 91 is selected corresponding lead flag according to user ID with the corresponding relation of lead flag.For example, subscriber equipment 91 also further comprises a memory cell, described memory cell, be used for preserving the correspondence relationship information of user ID and lead flag, after the Cell ID of Transmit-Receive Unit 915 reception base station 92 transmissions and the related information of Preamble ID, acquiring unit 911 is selected corresponding lead flag according to the correspondence relationship information of described user ID and lead flag.
In another embodiment of the present invention, described subscriber equipment 91 can also be according to user ID, and the direction of motion of subscriber equipment is selected corresponding lead flag with the corresponding relation of lead flag.For example, what described memory cell was preserved is user ID, the direction of motion information of subscriber equipment and the correspondence relationship information of lead flag, rather than the correspondence relationship information of user ID and lead flag.Described subscriber equipment 91 obtains the train direction of travel information by the train control system interface with train, utilizes the train direction of travel information, and different subscriber equipmenies is selected different Preamble ID.For example, when related four lead flags of cell ID (CellID) (Preamble ID), if train moves from place A to place B, user ID (UE ID) is that the subscriber equipment 91 of odd number is selected first Preamble ID, for example, acquiring unit 911 is selected first Preamble ID at this moment; UE ID is that the subscriber equipment 91 of even number is selected second Preamble ID, for example, and second Preamble ID of acquiring unit 911 selections this moment.Again for example, if train moves from place B to place A, UE ID is the 3rd Preamble ID of subscriber equipment 91 selections of odd number, for example, and the 3rd Preamble ID of acquiring unit 911 selections this moment; UE ID is that the subscriber equipment 91 of even number is selected the 4th Preamble ID, for example, and the 4th Preamble ID of acquiring unit 911 selections this moment.
For example, Transmit-Receive Unit 915 receives the accidental access response that base station 92 is returned, if resolution unit 913 successfully is resolved to RAR, expression accesses successfully at random.
By above-mentioned description as can be known, UE need not carry out Preamble again and select, and has reduced UE inter-process time delay, for example is approximately 5 milliseconds (ms); Further, because UE carries the Preamble ID related with Cell ID to the random access guiding information that E-UTRAN sends, reduced the process of the mutual Preamble ID of UE and E-UTRAN and UE ID, reduce the handling process of eating dishes without rice or wine twice, can greatly reduce time of delay, for example approximately can reduce 15 milliseconds (ms).
As shown in figure 10, be the structural representation of a kind of communication system of another embodiment of the present invention, this system can comprise subscriber equipment 100 and the base station 101 of mutual communication connection, and for example base station 101 can be eNB.Wherein base station 101 may further include: dispensing unit 1011, and memory cell 1012 and Transmit-Receive Unit 1013, its course of work is mainly as described below.
When network configuration, dispensing unit 1011 is used for arranging the cell ID (Cell ID) and at least one lead flag (Preamble ID) related information of each residential quarter, memory cell 1012 is used for this related information storage is for example stored with the form of mapping table.Certainly, can otherwise store, the present invention does not limit yet.
Wherein, the Cell ID of described each residential quarter need to be related with what Preamble ID, the present invention does not limit, can decide according to the quantity of the vehicles and the terminal quantity of configuration, for example in railway or high-speed railways, pass through simultaneously the train of certain residential quarter, at least one row can be, for example row, two row can be, three row, four row etc. and in railway or high-speed railways, are generally that headstock and the tailstock at a row train respectively configures a terminal, so the Cell ID of each residential quarter can be related with 2,4,6,8 Preamble ID respectively.Certainly, as required, can configure one or at least three terminals on a row train, the present invention does not limit yet.In addition, pass through simultaneously the quantity of the train of certain residential quarter, the present invention does not limit yet.Also for example, in the communication system of highway, the automobile that passes through simultaneously certain residential quarter also can be at least one, also can configure at least one terminal on each automobile.The configuration of other field of traffic is similar, does not repeat them here.
For example, when subscriber equipment 100 enters the residential quarter, detect the Cell ID of this residential quarter.
If subscriber equipment 100 is to start, enter idle condition after starting, the Transmit-Receive Unit 1013 of base station 101 by system message will be related with Cell ID Preamble ID send to subscriber equipment 100, for example dispensing unit 1011 increases the cell of a Cell ID and Preamble ID related information in system message 2 (SIB2 message), when Transmit-Receive Unit 1013 sends SIB2 message to subscriber equipment 100, carry the cell of this Cell ID and Preamble ID related information.Subscriber equipment 100 is used for receiving described cell and parsing of carrying this Cell ID and Preamble ID related information, to obtain the Preamble ID related with Cell ID.
If subscriber equipment 100 is by switching the target approach residential quarter, subscriber equipment 100 101 sends switching commands to the base station, and wherein, base station 101 is source base station.For example the Transmit-Receive Unit 1013 of this base station 101 sends the RRC connection reallocation message (RRCConnectionReconfiguration message) of carrying Target cell Preamble ID to UE, and for example dispensing unit 1011 connects at RRC the Preamble id information that increases Target cell in the neighboring BS information that carries in mobility control information (mobilityControlInfo) cell of reallocation message.Subscriber equipment 100 is used for receiving described RRC and connects reallocation message and resolve, to obtain the Preamble ID related with Cell ID.
Subscriber equipment 100,101 send random access guiding information (Random AccessPreamble) to the base station.Wherein, this random access guiding information is carried the Preamble ID related with Cell ID that described subscriber equipment 100 obtains.For example, subscriber equipment 100 101 sends the random access guiding information to the base station on certain subframe, for example, the Transmit-Receive Unit 1013 of base station 101 is handed down to subscriber equipment 100 by RRC message with the configuration parameter of Physical Random Access Channel (PRACH), the rrc layer of subscriber equipment 100 passes to the MAC layer by interlayer message with these parameters, and the MAC layer obtains to send on that subframe according to these calculation of parameter after these parameters.Receiving random access response (the RAR of subscriber equipment 100, Random Access Response) timer starts, if timer expiry, subscriber equipment 100 is not received RAR, retransmit described random access guiding information, if reach maximum number of retransmissions, 101 send the access failure message to the base station, subscriber equipment 100 is set to the free time (Idle) with current state.
In another embodiment of the present invention, the described Preamble ID related with Cell ID, subscriber equipment 100 can be selected according to preset configuration.For example, obtain the train direction of travel information by the train control system interface with train, utilize the train direction of travel information, different subscriber equipmenies is selected different Preamble ID.For example, when related four lead flags of cell ID (Cell ID) (PreambleID), if train moves from place A to place B, user ID (UE ID) is selected first Preamble ID for the subscriber equipment of odd number; UE ID is that the subscriber equipment 100 of even number is selected second Preamble ID.Again for example, if train moves from place B to place A, UE ID is the 3rd Preamble ID of subscriber equipment 100 selections of odd number; UE ID is that the subscriber equipment 100 of even number is selected the 4th Preamble ID.
If subscriber equipment 100 successfully is resolved to RAR, expression accesses successfully at random.
By above-mentioned description as can be known, UE need not carry out Preamble again and select, and has reduced UE inter-process time delay, for example is approximately 5 milliseconds (ms); Further, because UE carries the Preamble ID related with Cell ID to the random access guiding information that E-UTRAN sends, reduced the process of the mutual Preamble ID of UE and E-UTRAN and UE ID, reduce the handling process of eating dishes without rice or wine twice, can greatly reduce time of delay, for example approximately can reduce 15 milliseconds (ms).
The those skilled in the art can be well understood to, and is the convenience described and succinct, the system of foregoing description, and the specific works process of device and unit can with reference to the corresponding process in preceding method embodiment, not repeat them here.
By the description of above embodiment, the those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions are with so that a computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out all or part of step of the described method of each embodiment of the present invention.And aforesaid storage medium comprises: the various media that can be program code stored such as USB flash disk, portable hard drive, read-only memory (ROM), random access memory (RAM), magnetic disc or CD.
In several embodiment that the application provides, should be understood that, disclosed system, apparatus and method not surpassing in the application's spirit and scope, can realize in other way.For example, device embodiment described above is only schematic, for example, the division of described unit, be only that a kind of logic function is divided, during actual the realization, other dividing mode can be arranged, for example a plurality of unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Wherein said unit as the separating component explanation can or can not be also physically to separate, the parts that show as the unit can be or can not be also physical locations, namely can be positioned at a place, perhaps also can be distributed on a plurality of network element.Can select according to the actual needs wherein some or all of module to realize the purpose of the present embodiment scheme.Those of ordinary skills namely can understand and implement in the situation that do not pay creative work.
In addition, institute's descriptive system, the schematic diagram of apparatus and method and different embodiment, in the scope that does not exceed the application, can with other system, module, technology or method in conjunction with or integrated.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, indirect coupling or the communication connection of device or unit can be electrically, machinery or other form.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by described protection range with claim.
Claims (18)
1. the method for an access network, is characterized in that, comprising:
When subscriber equipment entered the residential quarter or start in this residential quarter, subscriber equipment obtained the lead flag related with the cell ID of this residential quarter;
Described subscriber equipment obtains the lead flag related with cell ID and specifically comprises:
Receive the cell ID of described network transmission and the related information of lead flag;
Resolve the related information of described cell ID and lead flag;
Obtain the described lead flag related with cell ID according to analysis result;
Describedly obtain the described lead flag related with cell ID according to analysis result and specifically comprise:
Described subscriber equipment can be selected corresponding lead flag according to preset strategy;
Described subscriber equipment can select corresponding lead flag specifically to comprise according to preset strategy:
Described subscriber equipment is according to user ID, and the direction of motion of subscriber equipment is selected corresponding lead flag with the corresponding relation of lead flag;
Send random access guiding information to network, wherein, described this random access guiding information is carried the lead flag related with cell ID of described acquisition;
Receive the accidental access response that described network returns.
2. the method for claim 1, is characterized in that, described subscriber equipment obtains the lead flag related with cell ID and specifically comprises:
If subscriber equipment starts in residential quarter corresponding to described cell ID, receive the system message that network sends, described system message is carried cell ID and lead flag related information;
Resolve described system message, obtain the described lead flag related with cell ID.
3. the method for claim 1, is characterized in that, described subscriber equipment obtains the lead flag related with cell ID and specifically comprises:
If subscriber equipment enters residential quarter corresponding to described cell ID by switching, by switching command from the described lead flag related with this cell ID of described Network Capture.
4. method as claimed in claim 3, is characterized in that, describedly specifically comprises from the described lead flag related with this cell ID of described Network Capture by switching command:
The Radio Resource control connection reallocation message that the reception sources base station sends, described Radio Resource control connection reallocation message is carried the lead flag related with this cell ID;
Resolve described Radio Resource control connection reallocation message;
According to analysis result, obtain the lead flag related with this cell ID.
5. method as claimed in claim 4, is characterized in that, the described lead flag related with this cell ID is carried in the neighboring BS information of mobility control information cell of described Radio Resource control connection reallocation message.
6. the method for claim 1, is characterized in that, when network configuration, the cell ID of each residential quarter and the incidence relation of at least one lead flag is set.
7. the method for claim 1, is characterized in that, described method further comprises:
Start the timer that receives described accidental access response;
If timer expiry is not received described accidental access response, retransmit described random access guiding; If reach maximum number of retransmissions, send access failure message to network, and current state is set to the free time.
8. a method of accepting user access network, is characterized in that, comprising:
When subscriber equipment enters the residential quarter or start in this residential quarter, send the lead flag related with the cell ID of this residential quarter to subscriber equipment;
When described subscriber equipment enters residential quarter corresponding to described cell ID by switching, describedly send the lead flag related with the cell ID of this residential quarter to subscriber equipment and specifically comprise:
Send the described lead flag related with cell ID by switching command to described subscriber equipment;
Describedly send the described lead flag related with cell ID by switching command to described subscriber equipment and specifically comprise:
Source base station sends Radio Resource control connection reallocation message to described subscriber equipment, and described Radio Resource control connection reallocation message is carried the lead flag with this cell association;
The described lead flag related with this cell ID is carried in the neighboring BS information of mobility control information cell of described Radio Resource control connection reallocation message;
Receive the random access guiding information that subscriber equipment sends, wherein, described this random access guiding information is carried the lead flag of described cell ID association;
Send accidental access response to described subscriber equipment.
9. method as claimed in claim 8, is characterized in that, also comprises:
The related information of cell ID and lead flag is set;
Preserve the related information of described cell ID and lead flag;
When described subscriber equipment enters residential quarter corresponding to this cell ID or start in this residential quarter, send lead flag described and that described cell ID is related to this subscriber equipment.
10. method as claimed in claim 8, is characterized in that, when described subscriber equipment starts in residential quarter corresponding to described cell ID, describedly sends the lead flag related with the cell ID of this residential quarter to subscriber equipment and specifically comprise:
To described subscriber equipment transmitting system message, described system message is carried cell ID and lead flag related information.
11. method as claimed in claim 8 is characterized in that, also comprises:
When network configuration, the cell ID of each residential quarter and the incidence relation of at least one lead flag are set.
12. method as claimed in claim 8 is characterized in that, also comprises:
With the form described cell ID of storage of mapping table and the related information of lead flag.
13. a subscriber equipment is characterized in that, comprising:
Acquiring unit is used for obtaining the lead flag related with the cell ID of this residential quarter when described subscriber equipment enters the residential quarter or start in this residential quarter;
Transmit-Receive Unit is used for sending random access guiding information to network, and wherein, described this random access guiding information is carried the lead flag related with cell ID of described acquisition; Receive the accidental access response that described network returns;
Described Transmit-Receive Unit also is used for receiving the cell ID of described network transmission and the related information of lead flag;
Described subscriber equipment also comprises:
Resolution unit, for the related information of resolving described cell ID and lead flag, and the result that will resolve sends to described acquiring unit;
Described subscriber equipment also comprises:
Memory cell, the correspondence relationship information that is used for storing user ID, user movement directional information and lead flag;
Described acquiring unit has for obtaining corresponding lead flag according to described user ID, user movement directional information with the correspondence relationship information of lead flag, perhaps,
Memory cell, the correspondence relationship information that is used for storing user ID and lead flag;
Described acquiring unit has for obtaining corresponding lead flag according to described user ID with the correspondence relationship information of lead flag.
14. a base station is characterized in that, comprising:
Memory cell is for the related information of storage cell ID and lead flag;
Transmit-Receive Unit is used for sending the lead flag related with the cell ID of this residential quarter to subscriber equipment when subscriber equipment enters the residential quarter or start in this residential quarter; Receive the random access guiding information that described subscriber equipment sends, wherein, described this random access guiding information is carried the lead flag of described cell ID association; Described subscriber equipment is according to user ID, and the direction of motion of subscriber equipment is selected corresponding described lead flag with the corresponding relation of lead flag; Send accidental access response to described subscriber equipment.
15. base station as claimed in claim 14 is characterized in that, also comprises:
Dispensing unit is for cell ID and at least one lead flag related information that each residential quarter is set.
16. base station as claimed in claim 14, it is characterized in that, when described subscriber equipment started in residential quarter corresponding to described cell ID, described Transmit-Receive Unit also is used for: to described subscriber equipment transmitting system message, described system message was carried cell ID and lead flag related information.
17. base station as claimed in claim 14, it is characterized in that, when described subscriber equipment enters residential quarter corresponding to described cell ID by switching, described Transmit-Receive Unit also is used for sending Radio Resource control connection reallocation message to described subscriber equipment, and described Radio Resource control connection reallocation message is carried the lead flag with this cell association.
18. a communication system comprises base station and subscriber equipment, described base station be connected communications of user equipment and connect, it is characterized in that,
Described base station is for the related information that cell ID and lead flag are set; When subscriber equipment enters the corresponding residential quarter of described cell ID or start in this residential quarter, send the related information of described cell ID and lead flag to described subscriber equipment; Receive the random access guiding information that described subscriber equipment sends, described random access guiding information is carried described lead flag, and sends the random access guiding response message to described subscriber equipment;
Described subscriber equipment is used for according to user ID, and the direction of motion of subscriber equipment is selected corresponding described lead flag with the corresponding relation of lead flag, and sends described random access guiding information to described base station.
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| PCT/CN2010/079374 WO2011066797A1 (en) | 2009-12-03 | 2010-12-02 | Method and system for accessing network |
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| CN 200910188631 CN102088793B (en) | 2009-12-03 | 2009-12-03 | Network access method and system |
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| CN109661803B (en) * | 2017-08-11 | 2021-08-13 | 瑞典爱立信有限公司 | Network device, terminal device and related methods |
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| WO2011066797A1 (en) | 2011-06-09 |
| CN102088793A (en) | 2011-06-08 |
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