CN102625461B - Method and system for random access to heterogeneous network - Google Patents
Method and system for random access to heterogeneous network Download PDFInfo
- Publication number
- CN102625461B CN102625461B CN201110340160.7A CN201110340160A CN102625461B CN 102625461 B CN102625461 B CN 102625461B CN 201110340160 A CN201110340160 A CN 201110340160A CN 102625461 B CN102625461 B CN 102625461B
- Authority
- CN
- China
- Prior art keywords
- user terminal
- carrier wave
- random access
- random
- wave set
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a method for random access to a heterogeneous network, which includes: receiving random access messages initiated by a user terminal; according to the random access messages, sectionalizing all component carriers of the user terminal based on the timing advance to form carrier groups; sending the responding messages of random access to the user terminal, so that the user terminal can finish the random access on the component carriers of the carrier groups. The invention further provides a corresponding system for random access to the heterogeneous network, which comprises the user terminal and base stations. By the aid of the method and the system for random access to the heterogeneous network, the rate of resource conflict arising in the heterogeneous network can be reduced effectively and the success rate of the random access performed by the user equipment can be improved.
Description
Technical field
The present invention relates to wireless communication field, specially refer to the method and system of random access in a kind of heterogeneous network.
Background technology
In follow-on broadband wireless communication network, solve and how under the bandwidth of current wireless communication system, to support the problem of larger bandwidth, become the key factor that improves inter-cell user terminal throughput and user terminal average throughput.At present, long-term technology evolution (LTE in third generation partner program, Long Term Evolution) in, propose to adopt the mode of carrier aggregation to carry out effectively in current wireless communication system, to support larger bandwidth, to meet the demand to indexs such as throughput, peak rates in new generation of wireless standard.Carrier aggregation is in future broadband wireless communication systems, to support the key technology of larger bandwidth, by the carrier wave to different, carry out polymerization, form the carrier wave of larger bandwidth, in bandwidth after polymerization, support to have the user side (UE of stronger ability, User Equipment), for example, the bandwidth that surpasses 100MHz in senior Long Term Evolution (LTE-Advanced) technology.
In the paradigmatic system of existing many component carriers, there is serious problem in the transmission of carrier wave indicator field (CIF, Carrier Indicator Field) and system information (SI, System Information).When CIF and SI with random access radio network temporary mark (RA-RNTI, Random Access Radio Network Temporary Identifier) or Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI, while Cell Radio Network Temporary Identifier) transmitting on the control channel of scrambling, on each control channel, the CIF of indexed resource transmission and SI need to be comprised in each component carrier (CC, Component Carriers) in common search interval, so just, can cause the resource shortage in common search interval, and, owing to having introduced new down link control information (DCI, Downlink Control Information) form, thereby cause the blind decoding number of attempting in common search interval to increase.Simultaneously, Timing Advance (TA on CC, while being Timing Advance) one or more, random access (RA, Random Access) process just may be assigned with on one or more CC, like this, and when the RA process of UE on one or more CC is all failed, when UE carries out across carrier wave RA process, for CIF and the SI of indexed resource transmission, also need to re-start setting.
Summary of the invention
Main purpose of the present invention, for the method for random access in a kind of heterogeneous network is provided, can be reduced in the problem of resource contention in heterogeneous network effectively, and can improve the success rate that user terminal carries out random access.
The method that the invention provides random access in a kind of heterogeneous network, comprising:
Receive the random accessing message that user terminal is initiated;
According to described random accessing message, all component carriers of user terminal are divided into groups according to Timing Advance, form carrier wave set;
To user terminal, send accidental access response message, on the component carrier for user terminal in described carrier wave set, complete random access.
Preferably, describedly according to random accessing message, all component carriers of user terminal are divided into groups according to Timing Advance carrying out, after forming carrier wave set, also comprise:
Disturbance regime according to the component carrier in described carrier wave set in community is to carrier wave set prioritization.
Preferably, described to user terminal transmission accidental access response message, on the component carrier for user terminal in described carrier wave set, complete random access and specifically comprise:
To user terminal, send accidental access response message, comprising carrier wave indicator field and the system information of the control channel indication by the scrambling of random access radio network temporary mark;
On the component carrier of scheduling user terminal in the high carrier wave set of priority, initiate random access, and for user terminal produces the solution based on competition on DSCH Downlink Shared Channel, wherein comprise by carrier wave indicator field and the system information of the control channel indication of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI scrambling;
User terminal decode described carrier wave indicator field and system information, finish random access procedure.
Preferably, before initiating random access on the component carrier at the described user terminal of execution in the high carrier wave set of priority, also comprise:
Be chosen in community in described carrier wave set in, disturb minimum component carrier, for user terminal, access at random.
Preferably, after execution user terminal is decoded described carrier wave indicator field and system information, also comprise:
Judge user terminal whether successfully decode described carrier wave indicator field and system information, if so, user terminal accesses successfully at random, finishes random access procedure;
If not, user terminal disturbs on minimum component carrier and initiates random accessing message successively according to priority order from high to low in carrier wave set, access successfully at random to user terminal, otherwise, user terminal random access failure.
The present invention also provides the system of random access in a kind of heterogeneous network, comprises user terminal and base station, and described base station comprises:
Receiver module, the random accessing message of initiating for receiving user terminal;
Grouping module, for according to described random accessing message, all component carriers of user terminal being divided into groups according to Timing Advance, forms carrier wave set;
Access module, for sending accidental access response message to user terminal, completes random access on the component carrier for user terminal in described carrier wave set.
Preferably, described base station also comprises:
Divide module, for according to the component carrier of described carrier wave set the disturbance regime in community to carrier wave set prioritization.
Preferably, described access module comprises:
Response unit, for sending accidental access response message to user terminal, comprising carrier wave indicator field and the system information of the control channel indication by the scrambling of random access radio network temporary mark;
Scheduling unit, for scheduling user terminal, on the component carrier of the high carrier wave set of priority, initiate random access, and for user terminal produces the solution based on competition on DSCH Downlink Shared Channel, wherein comprise by carrier wave indicator field and the system information of the control channel indication of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI scrambling; When user terminal is decoded after described carrier wave indicator field and system information, finish random access procedure.
Preferably, described access module also comprises:
Selected cell, for disturb minimum component carrier in described carrier wave set is chosen in community, accesses at random for user terminal.
Preferably, described base station also comprises:
Judge module, for judging user terminal whether successfully decode described carrier wave indicator field and system information, if so, user terminal accesses successfully at random, finishes random access procedure;
Scheduler module, for if not, scheduling user terminal disturbs on minimum component carrier and initiates random accessing message successively according to priority order from high to low in carrier wave set, accesses successfully at random to user terminal.
The present invention divides into groups according to timing advance TA by all component carriers that user terminal is used, according to different Timing Advances, component carrier is divided into different carrier wave set, and each carrier wave set, according to the component carrier of the interference minimum in community wherein, is carried out to the division of priority to the carrier wave set at its place according to its disturbance regime.Adopt in this way, in follow-up random access process, carrier wave indicator field CIF and system information SI only need to disturb minimum, on the most reliable component carrier, carry and transmit, and do not need to be comprised in the common search interval of each component carrier, thereby the problem that can not cause the resource shortage in common search interval, can effectively be reduced in the problem of resource contention in heterogeneous network, simultaneously, due in window at the same time, and within the scope of default largest random access number of times, can allow user terminal to initiate the repeatedly random accessing message based on competition, thereby can improve to a great extent the probability of success of the random access of user terminal.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of method one embodiment of random access in heterogeneous network of the present invention;
Fig. 2 is the schematic flow sheet accessing at random in method one embodiment of random access in heterogeneous network of the present invention;
Fig. 3 is the schematic flow sheet of the another embodiment of method of random access in heterogeneous network of the present invention;
Fig. 4 is the method schematic flow sheet of an embodiment again of random access in heterogeneous network of the present invention;
Fig. 5 is the structural representation of the system of random access in heterogeneous network of the present invention;
Fig. 6 is the structural representation of base station in system one embodiment accessing at random in heterogeneous network of the present invention;
Fig. 7 is the structural representation of access module in Fig. 6;
Fig. 8 is the structural representation of the another embodiment of system of random access in heterogeneous network of the present invention;
Fig. 9 is the system structural representation of an embodiment again of random access in heterogeneous network of the present invention.
The realization of the object of the invention, functional characteristics and advantage, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
With reference to Fig. 1, method one embodiment of random access in heterogeneous network of the present invention is proposed, the method comprises:
Step S101, receives the random accessing message that user terminal is initiated;
In the present embodiment, by base station, the component carrier in polymerization carrier system is carried out to corresponding indication and configuration, can reduce between base station and user terminal the Signalling exchange about component carrier.While accessing at random on user terminal need to the component carrier in polymerization carrier system, just can initiate to base station a random accessing message, now, base station receives this random accessing message.In the present embodiment, a Random Access based on competition can be preset for user terminal in base station, maximum random access number of times is set in each time window, and can judges that the random access in time window is success or failure according to this random access number of times.
Step S102, divides into groups all component carriers of user terminal according to described random accessing message according to Timing Advance, form carrier wave set;
After receiving the random accessing message of user terminal initiation, first can analyze all link informations of the user terminal of initiating random accessing message, and all component carriers that user terminal is used divide into groups according to timing advance TA, according to different Timing Advances, component carrier are divided into different carrier wave set.
Step S103, sends accidental access response message to user terminal, completes random access on the component carrier for user terminal in described carrier wave set.
In the present embodiment, when user terminal is initiated random accessing message, first can send a lead code to base station, when receive after this lead code base station, just can be according to the Physical Random Access Channel resource of lead code, obtain the random access radio network temporary mark RA-RNTI corresponding with it, and by this RA-RNTI feedback accidental access response message, to user terminal, send accidental access response message, for user terminal, after receiving response message, on the component carrier in carrier wave set, complete random access.
In the above-described embodiments, in heterogeneous network, the method for random access also comprises:
Step S104, the disturbance regime according to the component carrier in described carrier wave set in community is to carrier wave set prioritization.
All component carriers that user terminal is used are divided into after different carrier wave set according to timing advance TA, in each carrier wave set, can find the component carrier of the interference minimum in Yi Ge community, and according to the disturbance regime of this component carrier, the carrier wave set at its place is carried out to the division of priority, i.e. the interference of component carrier in community is less, and the priority level of the carrier wave set at its place is just higher, otherwise the priority level of carrier wave set is just lower.
The method of random access in heterogeneous network provided by the present invention, by all component carriers that user terminal is used, according to timing advance TA, divide into groups, according to different Timing Advances, component carrier is divided into different carrier wave set, and each carrier wave set, according to the component carrier of the interference minimum in community wherein, is carried out to the division of priority to the carrier wave set at its place according to its disturbance regime.Adopt in this way, in follow-up random access process, carrier wave indicator field CIF and system information SI only need to carry and transmit on interference minimum, the most reliable component carrier, and do not need to be comprised in the common search interval of each component carrier, thereby the problem that can not cause the resource shortage in common search interval, the problem of resource contention in heterogeneous network can be effectively reduced in, the success rate that user terminal carries out random access can be improved simultaneously.
With reference to Fig. 2, in heterogeneous network of the present invention, in method one embodiment of random access, step S103 specifically comprises:
Step S1031, sends accidental access response message to user terminal, comprising carrier wave indicator field and the system information of the control channel indication by the scrambling of random access radio network temporary mark;
After receiving the random accessing message of user terminal initiation, can be by an accidental access response message of random access radio network temporary mark RA-RNTI feedback to user terminal, in this accidental access response message, be included as component carrier in carrier wave set carrier wave indicator field CIF and the system information SI for control channel indication of preliminary appointment.In the present embodiment, CIF can comprise the situation of the SI that component carrier and position amount, connected mode, component carrier, component carrier centre frequency and component carrier that user terminal uses carry, and the user terminal channel quality that this CIF can progressively obtain according to follow-up base station changes; And SI can comprise the information such as centre carrier frequency, leading and synchronous channel position, and it can not change in follow-up flow process yet.
Step S1032, on the component carrier of scheduling user terminal in the high carrier wave set of priority, initiate random access, and for user terminal produces the solution based on competition on DSCH Downlink Shared Channel, wherein comprise by carrier wave indicator field and the system information of the control channel indication of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI scrambling;
When the accidental access response message feeding back by RA-RNTI is sent to after user terminal, just start according to timing advance TA, come scheduling user terminal to initiate random access, now, on the component carrier in the highest carrier wave set of user terminal can be used at it all carrier wave set medium priorities, initiate random access.First, the random access that user terminal is initiated refers to the transmission of carrying out first up link on component carrier, then, base station can produce the solution based on competition on DSCH Downlink Shared Channel for user terminal, comprising carrier wave indicator field CIF and the system information SI of the control channel indication by Cell Radio Network Temporary Identifier/Identity, Cell-RNTI scrambling, and carry out the synchronous trial of down link first according to CIF and SI.
Step S1033, user terminal decode described carrier wave indicator field and system information, finish random access procedure.
When user terminal carries out first the transmission of up link on component carrier, and successfully realized according to CIF and SI and having carried out after down link first synchronous, that is to say, user terminal is to CIF and SI successfully decoded, now, can judge that user terminal accesses successfully at random, just can finish random access procedure.
According to first timing advance TA, random access first to user terminal is dispatched, on component carrier in all the highest grades of carrier wave set medium priority that first user terminal is used at it carrier wave set, initiate random access, because the interference of the component carrier in the highest carrier wave set of priority level in community is minimum, therefore, just can improve the success rate that user terminal accesses first at random, and carrier wave indicator field CIF and system information SI do not need to be comprised in the common search interval of each component carrier, thereby the problem that can not cause the resource shortage in common search interval.
With reference to Fig. 3, the another embodiment of method of random access in heterogeneous network of the present invention is proposed, step S103 also comprises:
Step S1034, disturbs minimum component carrier in being chosen in community in described carrier wave set, for user terminal, accesses at random.
When the accidental access response message feeding back by RA-RNTI is sent to after user terminal, carrying out according to timing advance TA, before carrying out the process of the random access of scheduling user terminal initiation, in the carrier wave set that can also be divided into according to Timing Advance at the component carrier that user terminal is used, disturbance regime according to all component carriers in community, select minimum, the most reliable component carrier of interference, for user terminal, on this component carrier, initiate random access.
In carrier wave set, according to component carrier, the disturbance regime in community selects to disturb minimum component carrier to supply user terminal to access at random process, in the process of random access, on, the most reliable component carrier just can be only minimum in selected interference for the carrier wave indicator field CIF of control channel indexed resource transmission and system information SI, carry and transmit.Like this, can further guarantee that CIF and SI just do not need to be comprised in the common search interval of each component carrier, thereby can not cause the problem of the resource shortage in common search interval.
With reference to Fig. 4, the method that proposes in heterogeneous network of the present invention random access is an embodiment again, and the method also comprises:
Step S105, judges user terminal whether successfully decode described carrier wave indicator field and system information, and if so, user terminal accesses successfully at random, finishes random access procedure;
When user terminal carries out first the transmission of up link on component carrier, and carry out the synchronous trial of down link first according to carrier wave indicator field CIF and system information SI, be that user terminal is while decoding the step of CIF and SI, also need whether can successfully decode CIF and SI of user terminal to judge, whether the random access first that judges user terminal is successful, CIF and SI if user terminal has successfully been decoded, namely successfully realized synchronous according to down link first, just can judge accessing successfully at random first of user terminal, thereby finish the flow process of random access.
In the present embodiment, after the synchronization failure of random access and down link first, base station just can obtain the link information of more user terminal when accessing at random first, therefore, component carrier may be redistributed for user terminal in base station, and again according to timing advance TA, divide into groups for these component carriers, and to the carrier wave set prioritization forming after dividing into groups, and, can reassign carrier wave indicator field CIF, and be the solution based on competition on user terminal generation DSCH Downlink Shared Channel.
Step S106, if not, user terminal disturbs on minimum component carrier and initiates random accessing message successively according to priority order from high to low in carrier wave set, access successfully at random to user terminal, otherwise, user terminal random access failure.
CIF and SI if user terminal is not successfully decoded, namely realize synchronous according to down link first, just can judge the random access failure first of user terminal, at this moment, user terminal just can be in window at the same time, according to priority level order from high to low, in other carrier wave set outside selected carrier wave set, disturb on minimum component carrier and initiate random accessing message removing while accessing at random first successively, and judge equally whether can successfully the decode process of CIF and SI of user terminal, to judge whether success of random access.If user terminal is all failures of the random access on component carrier in the carrier wave set in all priority levels, or it is the default largest random access of user terminal number of times that the random access number of times that user terminal is initiated in window has at the same time surpassed base station, at this moment, just can judge the random access failure of user terminal, base station can disconnect and being connected of user terminal, and user terminal need to be waited for next time window, then in this time window, again initiate random access.
Whether the random access first that judges user terminal is successful, after success, finishes random access procedure; As random access failure first, can be in window at the same time, according to priority level order from high to low, in other carrier wave set outside selected carrier wave set, disturb on minimum component carrier and initiate random accessing message removing while accessing at random first successively, until access successfully at random.Adopt in this way, in window at the same time, and within the scope of default largest random access number of times, can allow user terminal to initiate the repeatedly random accessing message based on competition, thereby can increase to a great extent the probability of success of the random access of user terminal.
With reference to Fig. 5 and Fig. 6, system one embodiment of random access in heterogeneous network of the present invention is proposed, this system comprises base station and user terminal, wherein, base station comprises:
Receiver module 10, the random accessing message of initiating for receiving user terminal;
Grouping module 20, for according to described random accessing message, all component carriers of user terminal being divided into groups according to Timing Advance, forms carrier wave set;
Access module 30, for sending accidental access response message to user terminal, completes random access on the component carrier for user terminal in described carrier wave set.
In the present embodiment, by base station, the component carrier in polymerization carrier system is carried out to corresponding indication and configuration, can reduce between base station and user terminal the Signalling exchange about component carrier.While accessing at random on user terminal need to the component carrier in polymerization carrier system, just can initiate to base station a random accessing message, now, receiver module 10 receives these random accessing messages.In the present embodiment, a Random Access based on competition can be preset for user terminal in base station, maximum random access number of times is set in each time window, and can judges that the random access in time window is success or failure according to this random access number of times.
After receiving the random accessing message of user terminal initiation, first can analyze all link informations of the user terminal of initiating random accessing message, and all component carriers that 20 pairs of user terminals of grouping module are used divide into groups according to timing advance TA, according to different Timing Advances, component carrier are divided into different carrier wave set.
In the present embodiment, when user terminal is initiated random accessing message, first can send a lead code to base station, when receive after this lead code base station, just can be according to the Physical Random Access Channel resource of lead code, obtain the random access radio network temporary mark RA-RNTI corresponding with it, and by this RA-RNTI feedback accidental access response message, be that access module 30 sends accidental access response message to user terminal, for user terminal, after receiving response message, on the component carrier in carrier wave set, complete random access.
In the above-described embodiments, described base station also comprises:
Divide module 40, for according to the component carrier of described carrier wave set the disturbance regime in community to carrier wave set prioritization.
All component carriers that user terminal is used are divided into after different carrier wave set according to timing advance TA, in each carrier wave set, can find the component carrier of the interference minimum in Yi Ge community, and according to the disturbance regime of this component carrier, divide module 40 and the carrier wave set at its place is carried out to the division of priority, i.e. the interference of component carrier in community is less, and the priority level of the carrier wave set at its place is just higher, otherwise the priority level of carrier wave set is just lower.
The system of random access in heterogeneous network of the present invention, by all component carriers that user terminal is used, according to timing advance TA, divide into groups, according to different Timing Advances, component carrier is divided into different carrier wave set, and each carrier wave set, according to the component carrier of the interference minimum in community wherein, is carried out to the division of priority to the carrier wave set at its place according to its disturbance regime.Adopt in this way, in follow-up random access process, carrier wave indicator field CIF and system information SI only need to carry and transmit on interference minimum, the most reliable component carrier, and do not need to be comprised in the common search interval of each component carrier, thereby the problem that can not cause the resource shortage in common search interval, the problem of resource contention in heterogeneous network can be effectively reduced in, the success rate that user terminal carries out random access can be improved simultaneously.
With reference to Fig. 7, in heterogeneous network of the present invention, in system one embodiment of random access, access module 30 comprises:
Response unit 31, for sending accidental access response message to user terminal, comprising carrier wave indicator field and the system information of the control channel indication by the scrambling of random access radio network temporary mark;
Scheduling unit 32, for scheduling user terminal, on the component carrier of the high carrier wave set of priority, initiate random access, and for user terminal produces the solution based on competition on DSCH Downlink Shared Channel, wherein comprise by carrier wave indicator field and the system information of the control channel indication of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI scrambling; When user terminal is decoded after described carrier wave indicator field and system information, finish random access procedure.
After receiving the random accessing message of user terminal initiation, response unit 31 can be by an accidental access response message of random access radio network temporary mark RA-RNTI feedback to user terminal, in this accidental access response message, be included as component carrier in carrier wave set carrier wave indicator field CIF and the system information SI for control channel indication of preliminary appointment.In the present embodiment, CIF can comprise the situation of the SI that component carrier and position amount, connected mode, component carrier, component carrier centre frequency and component carrier that user terminal uses carry, and the user terminal channel quality that this CIF can progressively obtain according to follow-up base station changes; And SI can comprise the information such as centre carrier frequency, leading and synchronous channel position, and it can not change in follow-up flow process yet.
When the accidental access response message feeding back by RA-RNTI is sent to after user terminal, scheduling unit 32 just starts according to timing advance TA, come scheduling user terminal to initiate random access, now, on the component carrier in the highest carrier wave set of user terminal can be used at it all carrier wave set medium priorities, initiate random access.First, the random access that user terminal is initiated refers to the transmission of carrying out first up link on component carrier, then, base station can produce the solution based on competition on DSCH Downlink Shared Channel for user terminal, comprising carrier wave indicator field CIF and the system information SI of the control channel indication by Cell Radio Network Temporary Identifier/Identity, Cell-RNTI scrambling, and carry out the synchronous trial of down link first according to CIF and SI.
When user terminal carries out first the transmission of up link on component carrier, and successfully realized according to CIF and SI and having carried out after down link first synchronous, that is to say, user terminal is to CIF and SI successfully decoded, now, can judge that user terminal accesses successfully at random, just can finish random access procedure.
According to first timing advance TA, random access first to user terminal is dispatched, on component carrier in all the highest grades of carrier wave set medium priority that first user terminal is used at it carrier wave set, initiate random access, because the interference of the component carrier in the highest carrier wave set of priority level in community is minimum, therefore, just can improve the success rate that user terminal accesses first at random, and carrier wave indicator field CIF and system information SI do not need to be comprised in the common search interval of each component carrier, thereby the problem that can not cause the resource shortage in common search interval.
With reference to Fig. 8, the another embodiment of system of random access in heterogeneous network of the present invention is proposed, described access module 30 also comprises:
Selected cell 33, for disturb minimum component carrier in described carrier wave set is chosen in community, accesses at random for user terminal.
When the accidental access response message feeding back by RA-RNTI is sent to after user terminal, carrying out according to timing advance TA, before carrying out the process of the random access of scheduling user terminal initiation, in the carrier wave set that selected cell 33 can also be divided into according to Timing Advance at the component carrier that user terminal is used, disturbance regime according to all component carriers in community, select minimum, the most reliable component carrier of interference, for user terminal, on this component carrier, initiate random access.
In carrier wave set, according to component carrier, the disturbance regime in community selects to disturb minimum component carrier to supply user terminal to access at random process, in the process of random access, on, the most reliable component carrier just can be only minimum in selected interference for the carrier wave indicator field CIF of control channel indexed resource transmission and system information SI, carry and transmit.Like this, can further guarantee that CIF and SI just do not need to be comprised in the common search interval of each component carrier, thereby can not cause the problem of the resource shortage in common search interval.
With reference to Fig. 9, the system that proposes in heterogeneous network of the present invention random access is an embodiment again, and described base station also comprises:
Judge module 50, for judging user terminal whether successfully decode described carrier wave indicator field and system information, if so, user terminal accesses successfully at random, finishes random access procedure;
Scheduler module 60, for if not, scheduling user terminal disturbs on minimum component carrier and initiates random accessing message successively according to priority order from high to low in carrier wave set, accesses successfully at random to user terminal.
When user terminal carries out first the transmission of up link on component carrier, and carry out the synchronous trial of down link first according to carrier wave indicator field CIF and system information SI, be that user terminal is while decoding the step of CIF and SI, judge module 50 also needs whether can successfully decode CIF and SI of user terminal to judge, whether the random access first that judges user terminal is successful, CIF and SI if user terminal has successfully been decoded, namely successfully realized synchronous according to down link first, just can judge accessing successfully at random first of user terminal, thereby finish the flow process of random access.
In the present embodiment, after the synchronization failure of random access and down link first, base station just can obtain the link information of more user terminal when accessing at random first, therefore, component carrier may be redistributed for user terminal in base station, and again according to timing advance TA, divide into groups for these component carriers, and to the carrier wave set prioritization forming after dividing into groups, and, can reassign carrier wave indicator field CIF, and be the solution based on competition on user terminal generation DSCH Downlink Shared Channel.
CIF and SI if user terminal is not successfully decoded, namely realize synchronous according to down link first, just can judge the random access failure first of user terminal, at this moment, scheduler module 60 just can scheduling user terminal in window at the same time, according to priority level order from high to low, in other carrier wave set outside selected carrier wave set, disturb on minimum component carrier and initiate random accessing message removing while accessing at random first successively, and judge equally whether can successfully the decode process of CIF and SI of user terminal, to judge that whether random access is successful.If user terminal is all failures of the random access on component carrier in the carrier wave set in all priority levels, or it is the default largest random access of user terminal number of times that the random access number of times that user terminal is initiated in window has at the same time surpassed base station, at this moment, just can judge the random access failure of user terminal, base station can disconnect and being connected of user terminal, and user terminal need to be waited for next time window, then in this time window, again initiate random access.
Whether the random access first that judges user terminal is successful, after success, finishes random access procedure; As random access failure first, can be in window at the same time, according to priority level order from high to low, in other carrier wave set outside selected carrier wave set, disturb on minimum component carrier and initiate random accessing message removing while accessing at random first successively, until access successfully at random.Adopt in this way, in window at the same time, and within the scope of default largest random access number of times, can allow user terminal to initiate the repeatedly random accessing message based on competition, thereby can increase to a great extent the probability of success of the random access of user terminal.
The foregoing is only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (6)
1. a method for random access in heterogeneous network, is characterized in that, comprising:
Receive the random accessing message that user terminal is initiated;
According to described random accessing message, all component carriers of user terminal are divided into groups according to Timing Advance, form carrier wave set;
Disturbance regime according to the component carrier in described carrier wave set in community is to carrier wave set prioritization;
To user terminal, send accidental access response message, on the component carrier for user terminal in described carrier wave set, complete random access, specifically comprise:
To user terminal, send accidental access response message, comprising carrier wave indicator field and the system information of the control channel indication by the scrambling of random access radio network temporary mark;
On the component carrier of scheduling user terminal in the high carrier wave set of priority, initiate random access, and for user terminal produces the solution based on competition on DSCH Downlink Shared Channel, wherein comprise by carrier wave indicator field and the system information of the control channel indication of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI scrambling;
User terminal decode described carrier wave indicator field and system information, finish random access procedure.
2. the method for claim 1, is characterized in that, before initiating random access, also comprises on the component carrier at the described user terminal of execution in the high carrier wave set of priority:
Be chosen in community in described carrier wave set in, disturb minimum component carrier, for user terminal, access at random.
3. method as claimed in claim 2, is characterized in that, after execution user terminal is decoded described carrier wave indicator field and system information, also comprises:
Judge user terminal whether successfully decode described carrier wave indicator field and system information, if so, user terminal accesses successfully at random, finishes random access procedure;
If not, user terminal disturbs on minimum component carrier and initiates random accessing message successively according to priority order from high to low in carrier wave set, access successfully at random to user terminal, otherwise, user terminal random access failure.
4. a system for random access in heterogeneous network, comprises user terminal and base station, it is characterized in that, described base station comprises:
Receiver module, the random accessing message of initiating for receiving user terminal;
Grouping module, for according to described random accessing message, all component carriers of user terminal being divided into groups according to Timing Advance, forms carrier wave set;
Access module, for sending accidental access response message to user terminal, completes random access on the component carrier for user terminal in described carrier wave set;
Described base station also comprises:
Divide module, for according to the component carrier of described carrier wave set the disturbance regime in community to carrier wave set prioritization;
Described access module comprises:
Response unit, for sending accidental access response message to user terminal, comprising carrier wave indicator field and the system information of the control channel indication by the scrambling of random access radio network temporary mark;
Scheduling unit, for scheduling user terminal, on the component carrier of the high carrier wave set of priority, initiate random access, and for user terminal produces the solution based on competition on DSCH Downlink Shared Channel, wherein comprise by carrier wave indicator field and the system information of the control channel indication of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI scrambling; When user terminal is decoded after described carrier wave indicator field and system information, finish random access procedure.
5. system as claimed in claim 4, is characterized in that, described access module also comprises:
Selected cell, for disturb minimum component carrier in described carrier wave set is chosen in community, accesses at random for user terminal.
6. system as claimed in claim 4, is characterized in that, described base station also comprises:
Judge module, for judging user terminal whether successfully decode described carrier wave indicator field and system information, if so, user terminal accesses successfully at random, finishes random access procedure;
Scheduler module, for if not, scheduling user terminal disturbs on minimum component carrier and initiates random accessing message successively according to priority order from high to low in carrier wave set, accesses successfully at random to user terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110340160.7A CN102625461B (en) | 2011-11-01 | 2011-11-01 | Method and system for random access to heterogeneous network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110340160.7A CN102625461B (en) | 2011-11-01 | 2011-11-01 | Method and system for random access to heterogeneous network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102625461A CN102625461A (en) | 2012-08-01 |
| CN102625461B true CN102625461B (en) | 2014-11-05 |
Family
ID=46565087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110340160.7A Expired - Fee Related CN102625461B (en) | 2011-11-01 | 2011-11-01 | Method and system for random access to heterogeneous network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102625461B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445591B (en) | 2012-09-26 | 2021-12-28 | 华为技术有限公司 | System and method for random access in heterogeneous communication system |
| CN103874165B (en) * | 2012-12-17 | 2017-11-14 | 电信科学技术研究院 | A kind of business access method and device applied to LTE A systems |
| CN113115405B (en) * | 2016-02-29 | 2022-02-01 | 三星电子株式会社 | Apparatus and method for signaling system information |
| EP3451742B1 (en) * | 2016-05-26 | 2023-09-20 | Huawei Technologies Co., Ltd. | Transmission method for system message, and related device and communication system |
| EP3481107B1 (en) | 2016-06-30 | 2022-11-02 | Koninklijke Philips N.V. | System information transmission method and device |
| US10966142B2 (en) | 2016-12-30 | 2021-03-30 | Beijing Xiaomi Mobile Software Co., Ltd. | Method and device for transmitting system information and base station |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101646234A (en) * | 2009-09-01 | 2010-02-10 | 中兴通讯股份有限公司 | Obtaining method of timing lead |
| CN102118873A (en) * | 2010-01-05 | 2011-07-06 | 中兴通讯股份有限公司 | Method and device for selecting resources in carrier aggregation network |
| CN102158947A (en) * | 2010-01-11 | 2011-08-17 | 宏碁股份有限公司 | Method of uplink synchronization and related communication device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110103331A1 (en) * | 2009-11-05 | 2011-05-05 | Richard Lee-Chee Kuo | Method and apparatus to activate component carriers in a wireless communication network |
-
2011
- 2011-11-01 CN CN201110340160.7A patent/CN102625461B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101646234A (en) * | 2009-09-01 | 2010-02-10 | 中兴通讯股份有限公司 | Obtaining method of timing lead |
| CN102118873A (en) * | 2010-01-05 | 2011-07-06 | 中兴通讯股份有限公司 | Method and device for selecting resources in carrier aggregation network |
| CN102158947A (en) * | 2010-01-11 | 2011-08-17 | 宏碁股份有限公司 | Method of uplink synchronization and related communication device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102625461A (en) | 2012-08-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11985547B2 (en) | Method and apparatus for supporting flexible UE bandwidth in next generation communication system | |
| TWI693846B (en) | On-demand system information delivery procedure | |
| KR102409728B1 (en) | Uplink signal transmission method and user equipment | |
| US11252760B2 (en) | Method and wireless communication system for handling timer operation | |
| US11553529B2 (en) | Methods and apparatuses for determining and configuring a time-frequency resource, in the random access process | |
| US11032778B2 (en) | Uplink channel power allocation method and apparatus | |
| KR102181920B1 (en) | Communications device and method for improving the transmission of random access messages | |
| CN102238752B (en) | Random access control method of machine type communication (MTC) equipment and MTC equipment | |
| CN101588629B (en) | The determination method and apparatus of DL synchronization component carrier wave in a kind of carrier aggregation system | |
| CN106550480B (en) | Random access method, device and system | |
| CN102625461B (en) | Method and system for random access to heterogeneous network | |
| KR20170109569A (en) | Method for transmitting an uplink signal, user equipment and base station | |
| CN116647312A (en) | Terminal device, base station, and circuit and method for terminal device and base station | |
| CN107734713B (en) | Data transmission method and device | |
| CN103220680A (en) | Method, device and system for achieving scheduling request | |
| CN111491392B (en) | Communication method, terminal equipment and access network equipment | |
| US9900909B2 (en) | Communications system for transmitting and receiving data | |
| CN111405662A (en) | Data transmission method, network side equipment and user equipment | |
| CN113950151A (en) | Physical Downlink Control Channel (PDCCH) monitoring method, device and terminal | |
| US10440646B2 (en) | Communications device and method utilizing a delay period between transmission and reception of data via a wireless network | |
| US11317438B2 (en) | Floating-instant coordinated multipoint for new radio-unlicensed | |
| CN109565741B (en) | Method, device and system for acquiring system information | |
| KR20120023511A (en) | Apparatus and method for performing random access procedure in communication networks supporting machine type communication | |
| Liang et al. | A novel random access scheme based on successive interference cancellation for 5G networks | |
| WO2013185576A1 (en) | Method, device, and communication for transmission control |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180321 Address after: 518000, two 703A, COFCO business park, two Xian Xian Road, Xin'an, Shenzhen, Guangdong, Baoan District Patentee after: Shenzhen Fu Hai Sunshine Technology Co., Ltd. Address before: 518057 Nanshan District Guangdong high tech Industrial Park, South Road, science and technology, ZTE building, Ministry of Justice Patentee before: ZTE Corporation |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20191101 |