CN102036407A - Method and system of realizing random access - Google Patents
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Abstract
The invention provides a method and a system of realizing random access. In the method, UE (user equipment) can select each retaining descending component carrier wave through the information of other descending component carrier waves with different PRACH (Physical Random Access Channel) resources from the initial residing descending component carrier wave carried in the system information transmitted by the network side; the random access is carried out by selecting the ascending component carrier waves corresponding to the retaining descending component carrier waves; the partial UE retaining in the initial retaining carrier wave is successfully shunted to other selected descending component carrier waves to guarantee the load balance of the access; the carrier wave resources are reasonably distributed; and the probability that the random access of the UE generates the congestion on one ascending component carrier wave is reduced.
Description
Technical field
The present invention relates to senior Long Term Evolution (LTE-Advanced, Long-Term Evolution advance are called for short LTE-A) system, refer to a kind of method and system of inserting at random of realizing especially.
Background technology
Fig. 1 is the composition schematic diagram of cellular radio communication system, as shown in Figure 1, mainly is made up of terminal, base station and core net.Wherein, the network of being made up of the base station is called wireless access network (RAN, Radio AccessNetwork), is used for the management of Access Layer affairs such as Radio Resource.Can there be physics or connection in logic according to actual conditions between the base station, between base station among Fig. 11 and base station 2, perhaps between base station 1 and the base station 3.Each base station can connect with one or more than one core net node (CN, Core Network).Core net is used for being responsible for Non-Access Stratum affairs such as position renewal etc., and is the anchor point of user's face.Terminal (UE, User Equipment) be meant can with the various device of cellular radio communication network communication, such as mobile phone or notebook computer etc.
In order to satisfy the demand that growing big bandwidth high-speed mobile inserts, third generation partnership project (3GPP, Third Generation Partnership Projects) has been released the LTE-A standard.The LTE-A system carries out polymerization with the higher bandwidth of support to several carrier waves, and then obtains higher data rate.Each carrier wave that is aggregated is called one-component carrier wave (CC, component carrier), can be continuous between the component carrier, also can be discontinuous.
Downlink component carrier in the LTE-A system (DL CC) can comprise synchronizing channel and broadcast channel (PBCH, Physical Broadcast Channel), and wherein, synchronizing channel comprises primary synchronization channel and auxiliary synchronization channel.Broadcast channel on downlink component carrier refers to the channel of the broadcast that carries certain carrier wave or certain several carrier wave or whole sub-district, and these message can be had a certain same alike result in whole terminals in the sub-district or the sub-district all terminals receive.In addition, broadcast channel can refer to the physical channel of physical layer, also can refer to the transmission channel of medium access control (MAC) sublayer or the logic channel of RRM (RRC) sublayer.The information of broadcast channels carry common also can be called system information (System Information).The information of broadcast channel broadcasts has multiple, can comprise the frequency of (1) up-link carrier and the bandwidth of this up-link carrier; (2) configuration parameter of above-mentioned up-link carrier corresponding physical Random Access Channel.Master sync signal (PSS, Primary Synchronization Symbol) and secondary synchronizing signal (SSS, SecondarySynchronization Symbol) are respectively loaded information on the major-minor synchronizing channel.On each DL CC, all need dispose PSS, SSS, PBCH and system information block (SIB).
The random access procedure of the terminal of the LTE system of Rel8 version is roughly as follows:
UE carries out Cell searching with the frequency raster (raster) of 100kHz; UE detects PSS/SSS/PBCH on certain DL CC, and receives SIB; Usually this DL CC is the strongest DL CC of signal.
UE sends leading (Preamble) sign indicating number according to Physical Random Access Channel (PRACH) resource allocation that carries among the DL CC that receives to the base station; UE receives Random Access Channel (RACH) response message of DL CC, and wherein this DL CC is complementary with the UL CC that sends Preamble.
If under the carrier aggregation scene of LTE-A, still adopt the random access procedure of above-mentioned Rel8 version, when certain DL CC signal is the strongest, many UE can occurs and when Cell searching, all select the situation of this DL CC as resident carrier wave.And this moment, owing to only comprise the PRACH configuration information of the UL CC of this DL CC correspondence among the SIB, therefore, most of UE can only insert on this UL CC, the PRACH resource congestion of certain UL CC will appear like this, and the unbalanced phenomenon of load of having only user seldom to insert on other UL CC.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method of inserting at random of realizing, can guarantee the load balancing that inserts, reasonable distribution carrier resource.
Another object of the present invention is to provide a kind of system of inserting at random of realizing, can guarantee the load balancing that inserts, reasonable distribution carrier resource.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of method of inserting at random of realizing comprises:
Setting has the information of other downlink component carrier of different PRACH resources with initial resident downlink component carrier in the system information block SIB of initial resident downlink component carrier, and is handed down to the user terminal UE that selects to insert this initial resident descending carrier;
UE selects resident separately downlink component carrier according to the information of the downlink component carrier that carries among the SIB that receives, and the upstream components carrier wave of the downlink component carrier correspondence by selection inserts at random.
The described information that increases other downlink component carrier that is provided with in SIB is: described and initial resident downlink component carrier has the downlink component carrier corresponding district identification number of different PRACH resources; And,
With described initial resident downlink component carrier be in together in the continuous frequency range, have a centre frequency of other downlink component carrier of different PRACH configuration informations; And/or,
With initial resident downlink component carrier be in together in the continuous frequency range, have a bandwidth of other downlink component carrier of different PRACH configuration informations.
The described method that issues SIB is broadcasting.
Described UE selects resident separately downlink component carrier to be:
In the downlink component carrier that described UE broadcasts in the SIB of initial resident downlink component carrier, select a downlink component carrier to carry out resident at random; Perhaps,
Described UE selects a downlink component carrier to carry out resident according to default random selection strategy.
Described random selection strategy is:
The downlink component carrier of selecting to be numbered n according to formula IMSI MOD N=n is resident; Wherein, N is the number of downlink component carrier; N is the numbering of N downlink component carrier, and value is 0～(N-1); IMSI is the IMSI number of UE; MOD is the modulo operation symbol.
The acquisition methods of the numbering n of a described N downlink component carrier is: by the centre frequency of descending component carrier from low to high number consecutively be 0～N-1.
The upstream components carrier wave of described UE by the downlink component carrier correspondence selected inserts at random and is:
UE for selecting to reside on the described initial resident downlink component carrier obtains its corresponding upstream components carrier wave and PRACH resource allocation information the SIB from this descending carrier; On corresponding upstream components carrier wave, carry out random access procedure according to the PRACH configuration information;
For selecting other downlink component carrier to carry out resident UE, read the SIB of this downlink component carrier, obtain the upstream components carrier wave and the PRACH configuration information thereof of this downlink component carrier correspondence; On corresponding upstream components carrier wave, carry out random access procedure according to the PRACH configuration information.
A kind of system of inserting at random of realizing comprises network side and UE at least, wherein,
Network side is used for having the information of the downlink component carrier of different PRACH resources in the SIB of initial resident downlink component carrier setting with initial resident downlink component carrier, and is handed down to the UE that selects to insert this initial resident descending carrier;
UE is used for the information of the downlink component carrier that carries according to the SIB that receives, selects self resident downlink component carrier, and the upstream components carrier wave by the downlink component carrier correspondence selected inserts at random.
The described information that increases other downlink component carrier that is provided with in SIB is: described and initial resident downlink component carrier has the downlink component carrier corresponding district identification number of different PRACH resources; And,
With described initial resident downlink component carrier be in together in the continuous frequency range, have a centre frequency of other downlink component carrier of different PRACH configuration informations; And/or,
With initial resident downlink component carrier be in together in the continuous frequency range, have a bandwidth of other downlink component carrier of different PRACH configuration informations.
Described network side issues described SIB by broadcasting.
The technical scheme that provides from the invention described above as can be seen, in the inventive method, that carries in the system message that UE can issue by network side has the information of other downlink component carrier of different PRACH resources with initial resident downlink component carrier, select resident separately downlink component carrier, and insert at random by the upstream components carrier wave of selecting resident downlink component carrier correspondence, the part UE that success will reside in the initial resident carrier wave is diverted on the downlink component carrier of other selection, guaranteed the load balancing that inserts, reasonable distribution carrier resource, reduced UE and inserted at random on the upstream components carrier wave congested probability takes place.
Description of drawings
Fig. 1 is the composition schematic diagram of cellular radio communication system;
Fig. 2 realizes the flow chart of the method for access at random for the present invention;
Fig. 3 realizes the schematic diagram of the system of access at random for the present invention;
Fig. 4 is the schematic diagram of the corresponding relation of DL CC and UL CC in the first embodiment of the invention;
Fig. 5 for the present invention second and third, the schematic diagram of the corresponding relation of DL CC and UL CC among four and five embodiment.
Embodiment
Fig. 2 as shown in Figure 2, may further comprise the steps for the present invention realizes the flow chart of the method for access at random:
Step 200: setting has the information of the downlink component carrier of different PRACH resources with initial resident downlink component carrier in the SIB of initial resident downlink component carrier, and is handed down to the UE that selects to insert this initial resident descending carrier.Here, with the downlink component carrier that initial resident downlink component carrier has different PRACH resources be: the downlink component carrier except that initial resident descending carrier that carries in the system message that network side issues.
Wherein, what increase setting in SIB has the information of the downlink component carrier of different PRACH resources with initial resident downlink component carrier, can comprise: these DL CC corresponding district identification numbers (Cell-ID), and,
Be in the centre frequency (dl-CarrierFreq) of other DL CC in the continuous frequency range, that have different PRACH configuration informations together with initial resident DL CC; And/or,
Be in the bandwidth (dl-Bandwidth) of other DL CC in the continuous frequency range, that have different PRACH configuration informations together with initial resident DL CC.
In this step, in the SIB of initial resident downlink component carrier, carry the information of the downlink component carrier in the system that comprises initial resident downlink component carrier.
In this step, issue the mode that SIB can adopt broadcasting.
Step 201:UE selects resident separately downlink component carrier according to the information of the downlink component carrier that carries among the SIB that receives.
Suppose that N downlink component carrier is numbered 0～(N-1) from low to high by its centre frequency, comprising initial resident downlink component carrier, N is the number of downlink component carrier.UE selects resident separately downlink component carrier to be in this step:
Select a downlink component carrier to carry out resident in a plurality of downlink component carriers that UE broadcasts in the SIB of initial resident downlink component carrier at random; Perhaps,
UE selects a downlink component carrier to carry out resident according to default random selection strategy, wherein, default random selection strategy can be resident according to the downlink component carrier that formula IMSI MOD N=n selects to be numbered n for: UE, n is the numbering of N downlink component carrier, its value is 0～(N-1), wherein, IMSI is the IMSI number of UE, and MOD is the modulo operation symbol.
Step 202:UE inserts at random by the upstream components carrier wave of the downlink component carrier correspondence of selection.
UE for still selecting to reside on the initial resident downlink component carrier obtains its corresponding upstream components carrier wave and PRACH resource allocation information the SIB of this UE from this descending carrier; On corresponding upstream components carrier wave, carry out random access procedure according to the PRACH configuration information.
For selecting other downlink component carrier (non-initial resident carrier wave) to carry out resident UE, UE reads the SIB of this downlink component carrier, obtains the UL CC and the PRACH configuration information thereof of this DL CC correspondence; On corresponding UL CC, carry out random access procedure according to the PRACH configuration information.
In the inventive method, because what UE can issue by network side has the information of other downlink component carrier in the system of different PRACH resources with initial resident downlink component carrier, select resident separately downlink component carrier, and insert at random by the upstream components carrier wave of selecting resident downlink component carrier correspondence, the part UE that success will reside in the initial resident carrier wave is diverted on other downlink component carrier of selecting, guaranteed the load balancing that inserts, reasonable distribution carrier resource, reduced UE and inserted at random on the ULCC congested probability takes place.
At the inventive method, a kind of system of inserting at random of realizing also is provided, Fig. 3 realizes the schematic diagram of the system that inserts at random for the present invention, comprise network side and UE at least, wherein,
Network side is used for having the information of the downlink component carrier of different PRACH resources in the SIB of initial resident downlink component carrier setting with initial resident downlink component carrier, and is handed down to the UE that selects to insert this initial resident descending carrier; Here, with the downlink component carrier that initial resident downlink component carrier has different PRACH resources be: the downlink component carrier except that initial resident descending carrier that carries in the system message that network side issues.
UE is used for the information of the downlink component carrier that carries according to the SIB that receives, selects self resident downlink component carrier, and the upstream components carrier wave by the downlink component carrier correspondence selected inserts at random.
Described network side issues described SIB by broadcasting.
Below in conjunction with embodiment the inventive method is described in detail.
Fig. 4 is the schematic diagram of the corresponding relation of DL CC and UL CC in the first embodiment of the invention, and as shown in Figure 4, the above expression of chain-dotted line is descending, and the following expression of chain-dotted line is up, and big blank grid is represented component carrier; Diagonal line hatches represents on a left side is SCH/BCH, right diagonal line hatches is represented be PRACH, lattice shadow representation be PUCCH.In first embodiment, DL CC has 3 in the system, is respectively DL CC# 0, and DL CC# 1 and DL CC# 2, UL CC also have 3, is respectively UL CC# 0, UL CC# 1 and UL CC# 2, each corresponding DL CC of each UL CC.Suppose to have to be respectively IMSI# 0 IMSI number, 3 terminal UE # 0 of IMSI# 1 and IMSI# 2, UE# 1 and UE# 2 will insert at random, and hypothesis DL CC# 0 this moment signal is the strongest, and 3 UE can select it as initial resident downlink component carrier.
Because UL CC# 0, the DL CC of UL CC# 1 and UL CC# 2 correspondence has nothing in common with each other, its PRACH resource also has nothing in common with each other, so, in the SIB of initial resident DL CC# 0 carrier wave, increase centre frequency, bandwidth and Cell-ID information that other two DL CC are set is DL CC# 1 and DL CC# 2, and to give all UE by broadcast channel broadcasts be UE# 0, UE# 1 and UE# 2.
Suppose DL CC# 0, DL CC# 1 and DL CC# 2 renumber back correspondence 0,1 respectively from high to low according to centre frequency, No. 2, and IMSI#0MOD 3=0, IMSI#1MOD 3=1, IMSI#2MOD 3=2, UE# 0 then, UE# 1 and UE# 2 select to be numbered 0 respectively, 1, No. 2 downlink component carrier is resident, and promptly UE# 0 still resides on the initial resident DL CC# 0 carrier wave, and UE# 1, UE# 2 resides in DLCC# 1 respectively, on the DL CC# 2 carrier wave.
For the UE# 0 that still resides on the initial resident UL CC# 0, can from the system information on this downlink component carrier, obtain its corresponding UL CC# 0 and PRACH configuration information;
For selecting DL CC# 1 and DL CC#2 (non-initial resident carrier wave) to carry out resident UE# 1 and UE# 2 respectively, can read DL CC# 1 respectively, the system information of DL CC# 2 is obtained each self-corresponding UL CC# 1 and PRACH configuration information respectively, UL CC# 2 and PRACH configuration information.
Fig. 5 for the present invention second and third, the schematic diagram of DL CC and the corresponding relation of UL CC among four and five embodiment, as shown in Figure 5, the above expression of chain-dotted line is descending, chain-dotted line is following to be represented uply, big blank grid is represented component carrier; Diagonal line hatches represents on a left side is SCH/BCH, right diagonal line hatches is represented be PRACH, lattice shadow representation be PUCCH.DL CC has 3 in the system, is respectively DL CC# 0, and DL CC# 1 and DL CC# 2, UL CC have 2, is respectively UL CC# 0 and UL CC# 1.
In a second embodiment, suppose that UL CC# 0 is only corresponding with DL CC# 0, and corresponding DL CC# 1 of UL CC# 1 and DL CC#2.Although DL CC# 1 and DL CC# 2 be corresponding same UL CC, the Preamble that each self-configuring is different.
Suppose to have to be respectively IMSI# 0 IMSI number, 3 terminal UE # 0 of IMSI# 1 and IMSI# 2, UE# 1 and UE# 2 will insert at random, and hypothesis DL CC# 1 this moment signal is the strongest, and 3 UE can select it as initial resident downlink component carrier.Because DL CC# 1 and the corresponding different DL CC of DL CC# 0, its PRACH resource is also inequality.While DL CC# 1 and the corresponding different Preamble of DL CC# 2, its PRACH resource is also inequality.So, in the SIB of initial resident DL CC# 1 carrier wave, increase centre frequency, bandwidth and Cell-ID information that other two DL CC are set, and to give all UE by broadcast channel broadcasts be UE# 0, UE# 1 and UE# 2.
Suppose DL CC# 0, DL CC# 1 and DL CC# 2 renumber back correspondence 0,1 respectively from high to low according to centre frequency, No. 2, and IMSI#0MOD 3=0, IMSI#1MOD 3=1, IMSI#2MOD 3=2, UE# 0 then, UE# 1, UE# 2 select to be numbered 0 respectively, 1, No. 2 downlink component carrier is resident, and promptly UE# 1 still resides on the initial resident DL CC# 1 carrier wave, and UE# 0 and UE# 2 reside in respectively on DL CC# 0 and the DL CC# 2 carrier wave.
For the UE# 1 that still resides on the initial resident DL CC# 1, can from the system information on this downlink component carrier, obtain its corresponding upstream components carrier wave UL CC# 1 and PRACH configuration information;
For selecting DL CC# 0 and DL CC#2 (non-initial resident carrier wave) to carry out resident UE# 0 and UE# 2 respectively, can read DL CC# 0 respectively, the system information of DL CC# 2 is obtained each self-corresponding UL CC# 0 and PRACH configuration information respectively, UL CC# 2 and PRACH configuration information.
In the 3rd embodiment, suppose that UL CC# 0 is only corresponding with DL CC# 0, and corresponding DL CC# 1 of UL CC# 1 and DL CC#2.Although DL CC# 1 and DL CC# 2 be corresponding same UL CC, corresponding separately different Physical Resource Block (PRB).
Suppose to have to be respectively IMSI# 0 IMSI number, 3 terminal UE # 0 of IMSI# 1 and IMSI# 2, UE# 1 and UE# 2 will insert at random, and hypothesis DL CC# 1 this moment signal is the strongest, and 3 UE can select it as initial resident downlink component carrier.Because DL CC# 1 and the corresponding different DL CC of DL CC# 0, its PRACH resource is also inequality.While DL CC# 1 and the corresponding different PRB of DL CC# 2, its PRACH resource is also inequality.So, in the SIB of initial resident DL CC# 1 carrier wave, increase centre frequency, bandwidth and Cell-ID information that other two DL CC are set, and to give all UE by broadcast channel broadcasts be UE# 0, UE# 1 and UE# 2.
Suppose DL CC# 0, DL CC# 1 and DL CC# 2 renumber back correspondence 0,1 respectively from high to low according to centre frequency, No. 2, and IMSI#0MOD 3=0, IMSI#1MOD 3=1, IMSI#2MOD 3=2, UE# 0 then, UE# 1, UE# 2 select to be numbered 0 respectively, 1, No. 2 downlink component carrier is resident, and promptly UE# 1 still resides on the initial resident DL CC# 1 carrier wave, and UE# 0 and UE# 2 reside in respectively on DL CC# 0 and the DL CC# 2 carrier wave.
For the UE# 1 that still resides on the initial resident DL CC# 1, can from the system information on this downlink component carrier, obtain its corresponding upstream components carrier wave UL CC# 1 and PRACH configuration information;
For selecting DL CC# 0 and DL CC#2 (non-initial resident carrier wave) to carry out resident UE# 0 and UE# 2 respectively, can read DL CC# 0 respectively, the system information of DL CC# 2 is obtained each self-corresponding UL CC# 0 and PRACH configuration information respectively, UL CC# 2 and PRACH configuration information.
In the 4th embodiment, suppose that UL CC# 0 is only corresponding with DL CC# 0, and corresponding DL CC# 1 of UL CC# 1 and DL CC# 2, and DL CC# 1 has identical PRACH with DL CC# 2.
Suppose to have to be respectively IMSI# 0 IMSI number, 3 terminal UE # 0 of IMSI# 1 and IMSI# 2, UE# 1 and UE# 2 will insert at random, and hypothesis DL CC# 1 this moment signal is the strongest, and 3 UE can select it as initial resident downlink component carrier.Because DL CC# 1 and the corresponding different UL CC of DL CC# 0, its PRACH resource is also inequality; And DL CC# 1 and the corresponding identical PRACH resource of UL CC# 2, so only need in the SIB of DL CC# 1 carrier wave, increase centre frequency, bandwidth and the Cell-ID information that DL CC# 0 is set, and to give all UE by broadcast channel broadcasts be UE# 0, UE# 1 and UE# 2.
Suppose DL CC# 0, DL CC# 1 renumbers the back corresponding 0, No. 1 respectively from high to low according to centre frequency, and IMSI#0MOD 2=0, IMSI#1MOD 2=1, IMSI#2MOD 2=1, UE# 0 then, UE# 1 and UE# 2 select to be numbered 0 respectively, 1, No. 1 downlink component carrier is resident, and promptly UE# 1 and UE# 2 still reside on the initial resident DL CC# 1 carrier wave, and UE# 0 resides on the DL CC# 0 carrier wave.
For the UE# 1 and the UE# 2 that still reside on the initial resident UL CC# 1, can from the system information on this downlink component carrier, obtain its corresponding upstream components carrier wave UL CC# 1 and PRACH configuration information;
For selecting DL CC#0 (non-initial resident carrier wave) to carry out resident UE# 0, can read the system information of DL CC# 0, obtain its corresponding UL CC# 0 and PRACH configuration information.
In the 5th embodiment, suppose that UL CC# 0 is only corresponding with DL CC# 0, and corresponding DL CC# 1 of UL CC# 1 and DL CC# 2, and DL CC# 2 is as keeping component carrier, not as access carrier.
Suppose to have to be respectively IMSI# 0 IMSI number, 3 terminal UE # 0 of IMSI# 1 and IMSI# 2, UE# 1 and UE# 2 will insert at random, and hypothesis DL CC# 1 this moment signal is the strongest, and 3 UE can select it as initial resident downlink component carrier.Because DL CC# 1 and the corresponding different UL CC of DL CC# 0, its PRACH resource is also inequality, and UL CC# 2 is as keeping component carrier, not as access carrier, so, in the SIB of DL CC# 1 carrier wave, only increase centre frequency, bandwidth and the Cell-ID information that DL CC# 0 is set, and to give all UE by broadcast channel broadcasts be UE# 0, UE# 1 and UE# 2.
Suppose DL CC# 0, DL CC# 1 renumbers the back corresponding 0, No. 1 respectively from high to low according to centre frequency, and IMSI#0MOD 2=0, IMSI#1MOD 2=1, IMSI#2MOD 2=1, UE# 0 then, UE# 1 and UE# 2 select to be numbered 0 respectively, 1, No. 1 downlink component carrier is resident, and promptly UE# 1 and UE# 2 still reside on the initial resident DL CC# 1 carrier wave, and UE# 0 resides on the DL CC# 0 carrier wave.
For the UE# 1 and the UE# 2 that still reside on the initial resident UL CC# 1, can from the system information on this downlink component carrier, obtain its corresponding upstream components carrier wave UL CC# 1 and PRACH configuration information;
For selecting DL CC#0 (non-initial resident carrier wave) to carry out resident UE# 0, can read the system information of DL CC# 0, obtain its corresponding UL CC# 0 and PRACH configuration information.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the method that realization inserts at random is characterized in that, comprising:
Setting has the information of other downlink component carrier of different Physical Random Access Channel PRACH resources with initial resident downlink component carrier in the system information block SIB of initial resident downlink component carrier, and is handed down to the user terminal UE that selects to insert this initial resident descending carrier;
UE selects resident separately downlink component carrier according to the information of the downlink component carrier that carries among the SIB that receives, and the upstream components carrier wave of the downlink component carrier correspondence by selection inserts at random.
2. method according to claim 1 is characterized in that, the described information that increases other downlink component carrier that is provided with in SIB is: described and initial resident downlink component carrier has the downlink component carrier corresponding district identification number of different PRACH resources; And,
With described initial resident downlink component carrier be in together in the continuous frequency range, have a centre frequency of other downlink component carrier of different PRACH configuration informations; And/or,
With initial resident downlink component carrier be in together in the continuous frequency range, have a bandwidth of other downlink component carrier of different PRACH configuration informations.
3. method according to claim 1 is characterized in that, the described method that issues SIB is broadcasting.
4. method according to claim 1 is characterized in that, described UE selects resident separately downlink component carrier to be:
In the downlink component carrier that described UE broadcasts in the SIB of initial resident downlink component carrier, select a downlink component carrier to carry out resident at random; Perhaps,
Described UE selects a downlink component carrier to carry out resident according to default random selection strategy.
5. method according to claim 4 is characterized in that, described random selection strategy is:
The downlink component carrier of selecting to be numbered n according to formula IMSI MOD N=n is resident; Wherein, N is the number of downlink component carrier; N is the numbering of N downlink component carrier, and value is 0～(N-1); IMSI is the IMSI number of UE; MOD is the modulo operation symbol.
6. method according to claim 5 is characterized in that, the acquisition methods of the numbering n of a described N downlink component carrier is: by the centre frequency of descending component carrier from low to high number consecutively be 0～N-1.
7. method according to claim 1 is characterized in that, the upstream components carrier wave of described UE by the downlink component carrier correspondence selected inserts at random and be:
UE for selecting to reside on the described initial resident downlink component carrier obtains its corresponding upstream components carrier wave and PRACH resource allocation information the SIB from this descending carrier; On corresponding upstream components carrier wave, carry out random access procedure according to the PRACH configuration information;
For selecting other downlink component carrier to carry out resident UE, read the SIB of this downlink component carrier, obtain the upstream components carrier wave and the PRACH configuration information thereof of this downlink component carrier correspondence; On corresponding upstream components carrier wave, carry out random access procedure according to the PRACH configuration information.
8. the system that realization inserts at random is characterized in that, comprises network side and UE at least, wherein,
Network side, be used for having the information of the downlink component carrier of different Physical Random Access Channel PRACH resources with initial resident downlink component carrier, and be handed down to the UE that selects to insert this initial resident descending carrier in the SIB of initial resident downlink component carrier setting;
UE is used for the information of the downlink component carrier that carries according to the SIB that receives, selects self resident downlink component carrier, and the upstream components carrier wave by the downlink component carrier correspondence selected inserts at random.
9. system according to claim 8 is characterized in that, the described information that increases other downlink component carrier that is provided with in SIB is: described and initial resident downlink component carrier has the downlink component carrier corresponding district identification number of different PRACH resources; And,
With described initial resident downlink component carrier be in together in the continuous frequency range, have a centre frequency of other downlink component carrier of different PRACH configuration informations; And/or,
With initial resident downlink component carrier be in together in the continuous frequency range, have a bandwidth of other downlink component carrier of different PRACH configuration informations.
10. system according to claim 8 is characterized in that described network side issues described SIB by broadcasting.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100937973A CN102036407A (en) | 2009-09-28 | 2009-09-28 | Method and system of realizing random access |
| PCT/CN2010/077043 WO2011035700A1 (en) | 2009-09-28 | 2010-09-17 | Method and system for implementing random access |
Applications Claiming Priority (1)
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| CN2009100937973A CN102036407A (en) | 2009-09-28 | 2009-09-28 | Method and system of realizing random access |
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| WO2012167497A1 (en) * | 2011-08-03 | 2012-12-13 | 华为技术有限公司 | Sending method, enb and user equipment |
| WO2013026184A1 (en) * | 2011-08-24 | 2013-02-28 | Renesas Mobile Corporation | Apparatus and method for random access channel resource selection |
| WO2013166947A1 (en) * | 2012-05-11 | 2013-11-14 | 中兴通讯股份有限公司 | Method and device for signaling configuration, sending or reception |
| CN109845168A (en) * | 2017-06-15 | 2019-06-04 | 华为技术有限公司 | Accidental access method and relevant apparatus |
| CN114390718A (en) * | 2020-10-19 | 2022-04-22 | 展讯半导体(南京)有限公司 | Carrier wave determining method, device, storage medium and network side |
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| WO2011035700A1 (en) | 2011-03-31 |
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