CN101340707A - Random access method, network control unit, base station unit and user terminal - Google Patents
Random access method, network control unit, base station unit and user terminal Download PDFInfo
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- CN101340707A CN101340707A CNA2007101228015A CN200710122801A CN101340707A CN 101340707 A CN101340707 A CN 101340707A CN A2007101228015 A CNA2007101228015 A CN A2007101228015A CN 200710122801 A CN200710122801 A CN 200710122801A CN 101340707 A CN101340707 A CN 101340707A
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Abstract
The invention discloses a random access method of a multi-carrier system. In the random access method, every effective carrier in the multi-carrier system is pre-equipped with mapping relationship between an uplink synchronization code, a fast access indication channel and a physical random access and/or a reinforced random access channel, a user terminal is notified of the mapping relationship, and the uplink synchronization code from the user terminal is received; according to the equipped mapping relationship, the fast access indication channel corresponding to the uplink synchronization code is selected to respond to the indication information from the user terminal, and random access information from the user terminal is received on the physical random access or the reinforced random access channel. Furthermore, the invention also discloses a random access-to-network control unit of the multi-carrier system, a base station unit and the user terminal. The technology proposal of the invention can realize distribution of random access resource in the multi-carrier system.
Description
Technical field
The present invention relates to mobile communication technology, relate in particular to accidental access method, network control unit, base station unit and user terminal in a kind of multicarrier system.
Background technology
In TD SDMA (TD-SCDMA) system, when user terminal (UE) is set up the network connection, at first send a uplink synchronous code (SYNC-UL) to network side, network side is according to the SYNC-UL that is received, select corresponding Acquisition Indicator Channel (FPACH) fast to respond indication information to UE, after UE receives the FPACH response, going up the real random accessing message that transmission has relevant information with indication information corresponding physical Random Access Channel (PRACH) according to indication information wherein.Random Access Channel (RACH) is mapped to one or more PRACH, can determine the RACH capacity flexibly according to the needs of operator.
In addition, insert (HSUPA) technology in order to support high speed uplink packet, the TD-SCDMA system uplink has increased Enhanced Uplink Dedicated Channel and two control channels newly.The control channel that wherein is used for the request of up enhancing service access is enhanced uplink random access channel (E-RUCCH), and E-RUCCH is mapped on the physical accidental access-in resource, and promptly E-RUCCH and PRACH share identical random access resource.
But existing TD-SCDMA standard mainly is the situation at the corresponding carrier wave in a sub-district, be to be mainly single-carrier cell in the prior art, and the number of users that single-carrier cell can provide is limited, add that E-RUCCH shares identical random access resource with PRACH, make that the coverage rate of single-carrier cell is lower, therefore will improve system's coverage rate, the number of carriers of necessary increase system, promptly make a sub-district can dispose carrier wave, and claim that such sub-district is a multi-carrier district more than one.Multi-carrier district can hold more user in identical coverage, and can obtain average throughput burst rate simultaneously.To save the common channel resources of each carrier wave like this, thereby more effectively improve the ability of TD-SCDMA large-scale network-estabilishing.Comprise a main carrier and a plurality of subcarrier in multicarrier system, main carrier can be by the configuration unique identification of the broadcast channel on it.
But have only the uplink synchronous resource on the main carrier to be used to the uplink random access at present, not carrying out random access resource on the subcarrier distributes, therefore how realizing that random access resource in the multicarrier system distributes then to become needs a problem solving, does not also have a kind of good method to make full use of random access resource in the multicarrier system at present.
Summary of the invention
One aspect of the present invention provides the accidental access method in a kind of multicarrier system, random access system, network control unit, base station unit and user terminal in a kind of multicarrier system are provided on the other hand, have distributed so that realize the random access resource in the multicarrier system.
Accidental access method in the multicarrier system provided by the invention, mapping relations between the Random Access Channel of collocating uplink synchronous code on the effective carrier wave of each in multicarrier system, Acquisition Indicator Channel, Physical Random Access Channel and/or enhancing fast in advance, and described mapping relations are notified to user terminal, this method comprises:
Reception is from the uplink synchronous code of user terminal, according to described mapping relations, select to respond indication information to user terminal with the corresponding quick Acquisition Indicator Channel of described uplink synchronous code, and with the Random Access Channel of corresponding Physical Random Access Channel of described indication information or enhancing on receive random accessing message from user terminal.
Mapping relations between the Random Access Channel of collocating uplink synchronous code on the effective carrier wave of described each in multicarrier system in advance, Acquisition Indicator Channel, Physical Random Access Channel and/or enhancing fast are: the mapping relations between the Random Access Channel of the uplink synchronous code that disposed on the main carrier in the multicarrier system, Acquisition Indicator Channel and Physical Random Access Channel and/or enhancing are fast directly copied on effective subcarrier in the multicarrier system;
Perhaps be: dispose the mapping relations between the Random Access Channel of independent uplink synchronous code, fast Acquisition Indicator Channel and Physical Random Access Channel and/or enhancing respectively for each the effective carrier wave in the multicarrier system, mapping relations on described each carrier wave are different, or part is identical;
Perhaps be: the Random Access Channel of configures physical Random Access Channel and/or enhancing on the main carrier in multicarrier system, and the main carrier in multicarrier system and effectively collocating uplink synchronous code and Acquisition Indicator Channel fast on the subcarrier, and with the uplink synchronous code that disposed and fast Acquisition Indicator Channel be mapped on the Random Access Channel of the described Physical Random Access Channel that disposes on the main carrier and/or enhancing.
Wherein, describedly described mapping relations are notified to user terminal are: described mapping relations are notified to user terminal by broadcast.
Preferably, this method further comprises: the channel quality to the uplink synchronous channel on each effective carrier wave in the multicarrier system is measured, set uplink synchronous channel quality scale on each effective carrier wave according to the measurement result of described channel quality, according to described uplink synchronous channel quality scale, the dynamic maintenance rank of the Random Access Channel of related with it Physical Random Access Channel and/or enhancing is set, and the dynamic maintenance rank of described setting is notified to user terminal;
Described uplink synchronous code from user terminal is: user terminal is according to the dynamic maintenance rank of the Random Access Channel of described Physical Random Access Channel and/or enhancing, from multicarrier system, select to desire bearing carrier wave, the uplink synchronous code of on selected carrier wave, selecting.
Wherein, described channel quality to the uplink synchronous channel on each effective carrier wave in the multicarrier system is measured, the uplink synchronous channel quality scale of setting on each effective carrier wave according to the measurement result of described channel quality is: network side is measured the interference level of uplink synchronous channel in the transmission time on each effective carrier wave in the multicarrier system, received power according to the uplink synchronous channel of measured value that obtains and expectation, determine the uplink synchronous channel wanted to interfering signal ratio on each carrier wave, described uplink synchronous channel wanted to interfering signal ratio and the uplink synchronous channel wanted to interfering signal ratio threshold value set of being scheduled to are compared, according to comparative result, set the uplink synchronous channel quality scale on each carrier wave.
Wherein, described uplink synchronous channel wanted to interfering signal ratio threshold value set is by the base station configuration of operation management center or network side.
Wherein, described according to described uplink synchronous channel quality scale, the dynamic maintenance rank that the Random Access Channel of corresponding physical Random Access Channel with it and/or enhancing is set comprises:
If the current quality scale that is set of uplink synchronous channel with its before the quality scale that once is set mutually specific damping the k level, the dynamic maintenance rank of then setting the Random Access Channel of related with it whole Physical Random Access Channels and/or enhancing increases k level or 2k level, if the dynamic maintenance rank after the Random Access Channel of described Physical Random Access Channel and/or enhancing increases is greater than maximum level, setting described dynamic maintenance rank is maximum level;
If comparing with the quality scale that once is set before it, the current quality scale that is set of uplink synchronous channel increased the k level, and when the load of the access on the Random Access Channel of Guan Lian Physical Random Access Channel and/or enhancing is not high with it, the dynamic maintenance rank of then setting the Random Access Channel of described Physical Random Access Channel and/or enhancing reduces k level or 2k level, if the dynamic maintenance rank after the Random Access Channel of described Physical Random Access Channel and/or enhancing reduces is less than minimal level, setting described dynamic maintenance rank is minimal level; Wherein, k is a positive integer.
Preferably, this method further comprises: preestablish dynamic maintenance level threshold; When the dynamic maintenance rank of the Random Access Channel of whole Physical Random Access Channels on the carrier wave and/or enhancing is equal to or greater than described dynamic maintenance level threshold, when user terminal is selected to desire bearing carrier wave from multicarrier system, directly forbid selection to described carrier wave, wherein, minimal level＜dynamically keep level threshold＜=maximum level.
Preferably, this method further comprises: set in advance cycle period; Described channel quality to the uplink synchronous channel on each effective carrier wave in the multicarrier system is measured as: according to described cycle period, the channel quality of the uplink synchronous channel on each effective carrier wave in the multicarrier system is measured.
Preferably, this method further comprises: when the dynamic maintenance rank of the Random Access Channel of described Physical Random Access Channel and/or enhancing changes, described other change information of dynamic maintenance level is notified to user terminal.
Network control unit provided by the invention comprises:
The random access resource mapping block is used for the mapping relations between the Random Access Channel of collocating uplink synchronous code, quick Acquisition Indicator Channel and Physical Random Access Channel and/or enhancing on each effective carrier wave of multicarrier system in advance;
The mapping relations notification module is used for the described mapping relations of described random access resource mapping block configuration are notified to user terminal and base station unit.
Wherein, network control unit can be radio network controller.
Base station unit provided by the invention comprises:
The channel response module, be used to receive uplink synchronous code from user terminal, according to the mapping relations between the Random Access Channel of uplink synchronous code, quick Acquisition Indicator Channel and Physical Random Access Channel and/or enhancing, select to respond indication information to user terminal with the corresponding quick Acquisition Indicator Channel of uplink synchronous code.
Preferably, described base station unit further comprises:
Channel quality measurement module is used for the channel quality of the uplink synchronous channel on each effective carrier wave of multicarrier system is measured, and the measurement result that obtains is offered the quality scale setting module;
The measurement result that provides according to described channel quality measurement module is provided the quality scale setting module, sets the uplink synchronous channel quality scale on each effective carrier wave, and the uplink synchronous channel quality scale of described setting is offered dynamic maintenance grade setting module;
Dynamically keep the grade setting module, the described uplink synchronous channel quality scale that provides according to described quality scale setting module is provided, set the dynamic maintenance rank of the Random Access Channel of Physical Random Access Channel related and/or enhancing with uplink synchronous channel;
Dynamically keep the rank notification module, be used for the dynamic maintenance rank of the Random Access Channel of the described Physical Random Access Channel of described dynamic maintenance grade setting module settings and/or enhancing is notified to user terminal.
Wherein, this base station unit is: the base station of enhancing, or base station.
User terminal provided by the invention comprises:
The uplink synchronization request module, be used for basis from the mapping relations between the Random Access Channel of the uplink synchronous code of the multicarrier system of network side entity, quick Acquisition Indicator Channel, Physical Random Access Channel and/or enhancing, select uplink synchronous code, and the described uplink synchronous code that will select sends to network side entity;
Access module is used to receive the response from the quick Acquisition Indicator Channel of network side entity at random, according to described response, sends random accessing message on the Random Access Channel of corresponding Physical Random Access Channel or enhancing.
Preferably, this user terminal further comprises: carrier wave is selected module, be used for dynamic maintenance rank according to the Random Access Channel of Physical Random Access Channel and/or enhancing, select to desire bearing carrier wave in each carrier wave in multicarrier system, the information of selected carrier wave is offered the uplink synchronization request module;
Described uplink synchronization request module is carried out the operation of described selection uplink synchronous code on the described carrier wave that described carrier wave selects module to select.
Random access system in the multicarrier system provided by the invention comprises:
Network control unit, be used for the mapping relations between the Random Access Channel of collocating uplink synchronous code, quick Acquisition Indicator Channel and Physical Random Access Channel and/or enhancing on each effective carrier wave of multicarrier system in advance, and the mapping relations that disposed are notified to user terminal and base station unit;
Base station unit, be used to receive uplink synchronous code from user terminal, according to described mapping relations, select to respond indication information to user terminal with the corresponding quick Acquisition Indicator Channel of described up sign indicating number, and with the Random Access Channel of corresponding Physical Random Access Channel of described indication information or enhancing on receive random accessing message from user terminal;
User terminal, be used to select uplink synchronous code to send to network side entity, and reception is selected to indicate the Random Access Channel of corresponding Physical Random Access Channel or enhancing to send random accessing message with described response from the response indication of the quick Acquisition Indicator Channel of network side entity.
Preferably, described base station unit is further measured the channel quality of the uplink synchronous channel on each effective carrier wave in the multicarrier system, set uplink synchronous channel quality scale on each effective carrier wave according to the measurement result of described channel quality, according to described uplink synchronous channel quality scale, set the dynamic maintenance rank of the Random Access Channel of related with it Physical Random Access Channel and/or enhancing, and the dynamic maintenance rank of described setting is notified to user terminal;
Described user terminal is selected to desire bearing carrier wave from multicarrier system further according to the dynamic maintenance rank of the Random Access Channel of described Physical Random Access Channel and/or enhancing, carries out the operation of described selection uplink synchronous code on selected carrier wave.
From such scheme as can be seen, collocating uplink access-in resource mapping structure on the effective carrier wave of in multicarrier system each in advance among the present invention, thereby the resource on each carrier wave is carried out preassignment, receive the uplink synchronous code that user terminal sends afterwards, according to the mapping relations that disposed, select the quick Acquisition Indicator Channel corresponding to respond indication information to user terminal with uplink synchronous code, and with the corresponding access channel of described indication information on continue access operation at random, thereby realized the distribution of random access resource in the multicarrier system.
Description of drawings
To make the clearer above-mentioned and other feature and advantage of the present invention of those of ordinary skill in the art by describe exemplary embodiment of the present invention in detail with reference to accompanying drawing below, in the accompanying drawing:
Fig. 1 is the exemplary process diagram of the accidental access method in the multicarrier system in the embodiment of the invention;
Fig. 2 (a) and Fig. 2 (b) are the structure chart of a kind of random access resource mapping of the prior art;
Fig. 3 is the structure chart of a kind of random access resource mapping in the multicarrier system in the embodiment of the invention;
Fig. 4 is the structure chart of the another kind of random access resource mapping in the multicarrier system in the embodiment of the invention;
Fig. 5 is the structure chart of another the random access resource mapping in the multicarrier system in the embodiment of the invention;
Fig. 6 is the exemplary block diagram of the random access system in the multicarrier system in the embodiment of the invention;
Fig. 7 is a kind of structural representation of network control unit in the system shown in Figure 6;
Fig. 8 is a kind of structural representation of base station unit in the system shown in Figure 6;
Fig. 9 is a kind of structural representation of user terminal in the system shown in Figure 6.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
Fig. 1 is the exemplary process diagram of the accidental access method in the multicarrier system in the embodiment of the invention.As shown in Figure 1, this flow process comprises the steps:
Wherein, effectively carrier wave refers to the carrier wave that can be used for inserting at random, comprises main carrier and effective subcarrier.And when the mapping relations that disposed are notified to user terminal, can the mapping relations that be disposed be notified to user terminal by broadcast.
A kind of random access resource mapping relations when considering single carrier in the prior art on the main carrier are shown in Fig. 2 (a) and Fig. 2 (b), and Fig. 2 (a) and Fig. 2 (b) show the structure chart of a kind of random access resource mapping of the prior art.Wherein, be example with the situation that disposes two types RACH TFS Transport Format Set (TFS), frame length is 10 milliseconds among the TFS among Fig. 2 (a), and the bag size is 170, and frame length is 20 milliseconds among the TFS among Fig. 2 (b), and the bag size is 360.Owing in the TD-SCDMA system, adopt subframe structure usually, a subframe lengths is 5 milliseconds, there are a kind of mapping relations of FPACH and PRACH to satisfy again: FPACH number/PRACH number=1/n, n=frame length/subframe is long, therefore be to comprise two subframes, n=2, then FPACH number/PRACH number=1/2 in 10 milliseconds the frame for the length shown in Fig. 2 (a), i.e. corresponding two PRACH of FPACH are as the FPACH among Fig. 2 (a)
1/ PRACH
1(E-RUCCH
1) right, FPACH
1/ PRACH
2(E-RUCCH
2) right; FPACH
2/ PRACH
3(E-RUCCH
3) right, FPACH
2/ PRACH
4(E-RUCCH
4) right; Be to comprise four subframes in 20 milliseconds the frame for the length shown in Fig. 2 (b), n=4, FPACH number/PRACH number=1/4 then, i.e. corresponding four PRACH of FPACH are as the FPACH among Fig. 2 (b)
3/ PRACH
5(E-RUCCH
5) right, FPACH
3/ PRACH
5(E-RUCCH
5) right, FPACH
3/ PRACH
7(E-RUCCH
7) right, and FPACH
3/ PRACH
8(E-RUCCH
8) right.Wherein, above-mentioned each resource is to being associated with SYNC-UL in advance, and network side can be notified to UE with the mapping relations of SYNC-UL and FPACH and PRACH or E-RUCCH by broadcast, so that when UE inserts, from the SYNC_UL sequence, select suitable SYNC_UL to send, after in case SYNC_UL is selected, target FPACH is identified uniquely, then network side can be determined PRACH or E-RUCCH according to pre-defined algorithm, then the information of determined PRACH or E-RUCCH is indicated to UE by FPACH, so that UE sends the real random accessing message that has relevant information on corresponding PRACH or E-RUCCH.
The specific implementation form that network side disposes the mapping relations between SYNC_UL, FPACH and PRACH and/or the E-RUCCH in advance on the effective carrier wave of each in multicarrier system can have multiple.Only enumerating wherein below, three kinds of realizations to these mapping relations are described in detail:
First kind of collocation method: the mapping relations between SYNC_UL set on the main carrier in the multicarrier system, FPACH and PRACH and/or the E-RUCCH are directly copied on effective subcarrier in the multicarrier system.
Fig. 3 shows when using first kind of collocation method, the structure chart of a kind of random access resource mapping in the embodiment of the invention in the multicarrier system.In the present embodiment still the situation with two types TFS be example.Suppose that the effective carrier wave in the multicarrier system is 2, comprise main carrier (carrier wave 1) and 1 subcarrier (carrier wave 2), and the left side of supposing dotted line among Fig. 3 is the structure chart of the random access resource mapping on the main carrier, then as shown in Figure 3, the principle that random access resource shines upon in the single-carrier cell in the principle of random access resource mapping and the prior art on this main carrier is consistent, and the random access resource mapping structure in the random access resource mapping structure on dotted line right side and dotted line left side is identical among Fig. 3, is about in the multicarrier system set SYNC_UL on the main carrier, mapping relations between FPACH and PRACH and/or the E-RUCCH directly copy on effective subcarrier in the multicarrier system and get final product.In the drawings, FPACH
j iBe illustrated in j FPACH on the carrier wave i.
In this method, dispose an independent mapping structure on each effective carrier wave respectively, just the mapping structure on each effective carrier wave is identical, and this attributes such as the time slot that can be not limited to PRACH and/or E-RUCCH and channel code that duplicate.Therefore under this mapping mode,, can need not the SYNC_UL information on the indication subcarrier in the information of PRACH in broadcast and/or E-RUCCH because the mapping relations of configuration are identical.
Second kind of collocation method: for each the effective carrier wave in the multicarrier system disposes mapping relations between independent SYNC_UL, FPACH and PRACH and/or the E-RUCCH respectively, the mapping relations on each carrier wave are different, or part is identical.
Fig. 4 shows when using second kind of collocation method, the structure chart of the another kind of random access resource mapping in the embodiment of the invention in the multicarrier system.The random access resource mapping structure in dotted line left side is different with the random access resource mapping structure on dotted line right side among Fig. 4, promptly can be a random access resource mapping structure that sub-district flexible configuration on different carrier is different in this method.Equally, in the drawings, FPACH
j iBe illustrated in j FPACH on the carrier wave i.
In this method, dispose an independent mapping structure on each effective carrier wave respectively, just the mapping structure on each effective carrier wave is incomplete same, even different fully.Under this mapping mode, need in broadcast, clearly indicate the resource mapping ensemblen on each carrier wave, i.e. the mapping relations collection of PRACH and/or E-RUCCH and SYNC_UL and FPACH on each carrier wave.
The third collocation method: PRACH and/or E-RUCCH are set on the main carrier in multicarrier system, on main carrier in multicarrier system and the effective subcarrier SYNC_UL and FPACH are set, and set SYNC_UL and FPACH are mapped on the PRACH and/or E-RUCCH that is provided with on the main carrier.
Fig. 5 shows when using the third collocation method, the structure chart of another the random access resource mapping in the embodiment of the invention in the multicarrier system.If on any one subcarrier, do not allow PRACH and/or E-RUCCH, then as shown in Figure 5, available SYNC_UL and the FPACH resource on all effective carrier waves (no matter being main carrier or subcarrier) can be mapped on the PRACH and/or E-RUCCH that is provided with on the main carrier.
Under this mapping mode, need in broadcast, clearly indicate the resource mapping ensemblen on each carrier wave.Be PRACH and/or SYNC_UL on E-RUCCH and each carrier wave and the mapping relations collection of FPACH on the main carrier.Equally, in the drawings, FPACH
j iBe illustrated in j FPACH on the carrier wave i.
For above-mentioned three kinds of collocation methods, the resource distribution of PRACH and E-RUCCH does not limit in the Random Access Channel, promptly is not limited to the mapping relations among Fig. 3 to Fig. 5, the mapping of all carrying out with the situation of PRACH and the shared same asset of E-RUCCH among Fig. 3 to Fig. 5.In the practical application, when specifically shining upon, can be according to the situation flexible allocation PRACH and the E-RUCCH of user terminal in channel conditions and the sub-district, in each carrier wave, some resource distribution is the PRACH private resource, some resource distribution is the E-RUCCH private resource, and some resource distribution is PRACH and E-RUCCH resources shared in addition; Or in certain carrier wave, all resource all is configured to the PRACH private resource, or the E-RUCCH private resource, or PRACH and E-RUCCH resources shared etc.
In order to realize the mapping relations that disposed being notified to user terminal by broadcast, can expand the corresponding information in the broadcast, and when expanding, can adopt the reserved field in original field, also can new field.
, to shown in the table three corresponding information is expanded as following table one, and increased corresponding information indication field.
The SYNC_UL information table of table one after for expansion, for for simplicity, omitted some original informations in this table:
| Information unit/group name (Information Elcment/Group name) | Require (Need) | A plurality of (Multi) | Type and reference (Type and reference) | Semantic description (Semantics description) | Version (Version) |
| …… | …… | …… | …… | …… | |
| The code bitmap of E-RUCCH SYNC_UL (E-RUCCH SYNC_UL codes bitmap) | MP | Position character string (8) (Bitstring (8)) | …… | REL-7 | |
| SYNC_UL frequency (SYNC_UL frequency) | Essential, default value (MD) can be arranged | Integer (0.. 16383) (Integer (0.. 16383)) | Default value is main carrier (Default value is primary frequency) |
Table one
In the above-mentioned table one, increase the field of SYNC_UL frequency (SYNC_UL frequency), be used to indicate the SYNC_UL information on the subcarrier.
Table two is similarly for simplicity for the PRACH information table after expanding, and has omitted some original informations in this table:
| Information unit/group name (Information Element/Group name) | Require (Need) | A plurality of (Multi) | Type and reference (Type and reference) | Semantic description (Semantics description) | Version (Version) |
| …… | …… | …… | …… | …… | …… |
| Time division duplex (TDD) | |||||
| Selection TDD option (CHOICE TDD option) | MP | REL-4 | |||
| …… | …… | …… | …… | …… | …… |
| SYNC_UL information (SYNC_UL info) | MP | SYNC_UL info 10.3.6.78a | REL-4 | ||
| PRACH frequency (PRACH frequency) | Essential, default value (MD) can be arranged | Integer (0.. 16383) (Integer (0.. 16383)) | Default value is main carrier (Default value is primary frequency | ||
| PRACH defines (PRACH Definition) | |
1..<maxPR ACH_FPA CH> | REL-4 | ||
| …… | …… | …… | …… | …… |
Table two
In the above-mentioned table two, increase the field of PRACH frequency (PRACH frequency), be used to indicate the PRACH information on the subcarrier.
Table three is similarly for simplicity for the FPACH information table after expanding, and has omitted some original informations in this table:
| Information unit/group name (Information Element/Group name) | Require (Need) | Multi | Type and reference (Type and reference) | Semantic description (Semantics description) | Version (Version) |
| Timeslot number (Timeslot number) | MP | Integer (0..6) | REL-4 | ||
| Channel code (Channelisation code) | MP | Enumeration type ((16/1) .. (16/16) | REL-4 | ||
| …… | …… | …… | …… | …… | |
| Frequency (Frequency) | Essential, default value (MD) can be arranged | Integer (0.. 16383) (Integer (0.. 16383)) | Default value is main carrier (Default value is primary frequency |
Table three
In the above-mentioned table three, increase the field of FPACH frequency (Frequency), be used to indicate the FPACH information on the subcarrier.
In addition, other mode can also be arranged, give unnecessary details no longer one by one herein for the expansion of information.
After the mapping relations that disposed are notified to user terminal, further, user terminal can be with the Random Access Channel of same type Physical Random Access Channel on the different carrier and/or enhancing and uplink synchronous code, the mapping relations between the Acquisition Indicator Channel are combined fast, as the basis of selecting.
Wherein, user terminal can select a SYNC_UL to send from the SYNC_UL sequence according to the mapping relations that disposed after determining the RACH TFS of required type at random, afterwards can according to prior art in identical method be that user terminal inserts.Specifically comprise: network side is according to received SYNC_UL, select corresponding FPACH to respond indication information to user terminal, after then user terminal receives the FPACH response,, on corresponding PRACH or E-RUCCH, send random accessing message according to indication information wherein.Promptly, if the i (i=1 that user terminal is expected in a RACH Transmission Time Interval (TTI) scope, 2...TTI/5) FPACH on the individual subframe goes up and obtain to confirm, then user terminal will be definitely uses in next RACH TTI scope that { i the PRACH (or E-RUCCH) the PRACH} (or { E-RUCCH}) shines upon as FPACH (or E-RUCCH), carries random accessing message.
Further, consider in multicarrier system, owing to may there be the uplink synchronous channel of a transmission SYNC_UL on the carrier wave, or be called the possibility that uplink pilot time slot (UpPTS) was seriously disturbed in a certain period, and uplink synchronous channel with will be associated by the RACH that user terminal uses in random access procedure, and RACH is mapped to one or more PRACH and/or E-RUCCH.Therefore the at random access attempts of user terminal on disturbed carrier wave will be failed probably.From whole service time, this has increased conversation and has set up or data transfer delay.Therefore, in this case, system should provide reliable protective measure, successfully carries out so that guarantee the access at random of all user terminals in the sub-district.About the interrelational form of uplink synchronous channel and Random Access Channel and the detailed description of random access procedure see also 3GPP standard document TS 25.331.
Therefore, can further measure in this method the channel quality of the uplink synchronous channel on each effective carrier wave in the multicarrier system, set uplink synchronous channel quality scale on each effective carrier wave according to the measurement result of channel quality, and then according to the uplink synchronous channel quality scale on each effective carrier wave, the dynamic maintenance rank of the Random Access Channel of corresponding physical Random Access Channel with it and/or enhancing is set, and set dynamic maintenance rank is notified to user terminal.
User terminal is before selecting SYNC_UL, can be according to the dynamic maintenance rank of the Random Access Channel of set Physical Random Access Channel and/or enhancing, from multicarrier system, select to desire bearing carrier wave, then, on selected carrier wave, select SYNC_UL at random.
During specific implementation, the channel quality of the uplink synchronous channel on each carrier wave can be by the interference level decision of the uplink synchronous channel on each carrier wave in the duration, then the channel quality of the uplink synchronous channel on each effective carrier wave in the multicarrier system is measured, the uplink synchronous channel quality scale of setting on each effective carrier wave according to the measurement result of channel quality can specifically comprise: the interference level of uplink synchronous channel in the transmission time on each effective carrier wave in the multicarrier system measured, according to the measured value that obtains and in conjunction with the received power value of known desired uplink synchronous channel, calculate signal-to-jamming ratio (SIR) numerical value of each uplink synchronous channel, described uplink synchronous channel wanted to interfering signal ratio and the SIR threshold value set of being scheduled to are compared, according to comparative result, set the uplink synchronous channel quality scale on each carrier wave.
Wherein, the quality scale of uplink synchronous channel can be set at a plurality of ranks, for example is set at level Four, is respectively good, common, bad, blocks, and uses from 0 to 3 digitized representation respectively.For the purpose of simplified system, also can use the less grade setting of number.
Be respectively situation good, common, bad, that block for rank, can set in advance the SIR threshold set and be combined into { SIR
Well, SIR
Common, SIR
Block, the quality scale that set the uplink synchronous channel on each carrier wave this moment can be specially: if the SIR of the uplink synchronous channel that calculates is greater than SIR
Well, the quality scale of then setting uplink synchronous channel is " well "; If the SIR of the uplink synchronous channel that calculates is less than SIR
WellAnd greater than SIR
Common, the quality scale of then setting uplink synchronous channel is " common "; If the SIR of the uplink synchronous channel that calculates is less than SIR
CommonAnd greater than SIR
Block, the quality scale of then setting uplink synchronous channel is " bad "; If the SIR of the uplink synchronous channel that calculates is less than SIR
Block, the quality scale of then setting uplink synchronous channel is " obstruction ".
Wherein, SIR threshold value set { SIR
Well, SIR
Common, SIR
BlockCan determine by operation management center (OMC) configuration or by the base station of network side.
According to the uplink synchronous channel quality scale on each carrier wave, the step that the dynamic maintenance rank of the Random Access Channel of associated Physical Random Access Channel of uplink synchronous channel and/or enhancing is set can specifically comprise:
(1) if current quality scale that is set of uplink synchronous channel with its before the quality scale that once is set mutually specific damping k (for four ranks of above-mentioned setting, k=1,2,3) level, the dynamic maintenance rank of then setting the Random Access Channel of related with it whole Physical Random Access Channels and/or enhancing increase the k level (when the number of described quality scale more for a long time) or the 2k level (when the number of described quality scale more after a little while), if the dynamic maintenance rank after the Random Access Channel of described Physical Random Access Channel and/or enhancing increases is greater than maximum level (as 8), setting described dynamic maintenance rank is maximum level (as 8);
(2) if comparing with the quality scale that once is set before it, current quality scale that is set of uplink synchronous channel increased k (for four ranks of above-mentioned setting, k=1,2,3) level, and when the load of the access on the Random Access Channel of Guan Lian Physical Random Access Channel and/or enhancing is not high with it, the dynamic maintenance rank of then setting the Random Access Channel of described Physical Random Access Channel and/or enhancing reduce the k level (when the number of described quality scale more for a long time) or the 2k level (when the number of described quality scale more after a little while), if the dynamic maintenance rank after the Random Access Channel of described Physical Random Access Channel and/or enhancing reduces is less than minimal level (as 1), setting described dynamic maintenance rank is minimal level (as 1).
In addition, for fear of the inappropriate carrier wave of user terminal selecting, can preestablish dynamic maintenance level threshold N
Threshold valueThe dynamic maintenance rank of the whole Physical Random Access Channels on a carrier wave and/or the Random Access Channel of enhancing is equal to or greater than N
Threshold ValueThe time, when user terminal is selected to desire bearing carrier wave, directly forbid selection to this carrier wave from multicarrier system, wherein, minimal level＜N
Threshold value＜=maximum level is (as 1＜N
Threshold value＜=8).
Wherein, the dynamic maintenance grade setting of the Random Access Channel of the uplink synchronous channel quality scale setting on each carrier wave and Physical Random Access Channel and/or enhancing periodically carries out.For example, set in advance cycle period, according to set cycle period, channel quality to the uplink synchronous channel on each effective carrier wave in the multicarrier system is measured, and according to the channel quality of measured uplink synchronous channel, set the uplink synchronous channel quality scale, and further set the dynamic maintenance rank of the Random Access Channel of Physical Random Access Channel and/or enhancing.
When the dynamic maintenance rank of the Random Access Channel of any one Physical Random Access Channel and/or enhancing changes, can will dynamically keep other change information of level to be notified to user terminal further.At this moment, but the system business message blocks SIB 7bis of network side start-up system service message piece SIB 7 and/or expansion dynamically keeps other renewal of level to the Random Access Channel of user terminal notice Physical Random Access Channel and/or enhancing.Simultaneously, user terminal can receive the dynamic continuance level that upgrades based on the mechanism that timer is out-of-date from described SIB7 and/or SIB 7bis.Wherein, the definition to the out-of-date mechanism of timer sees also 3GPP standard document 3GPP TS 25.331.
Wherein, user terminal is according to the dynamic maintenance rank of the Random Access Channel of set Physical Random Access Channel and/or enhancing, and the process of selecting to desire bearing carrier wave from multicarrier system can be specially:
If I is for carrying out remaining number of carriers in the described pre-selection step described on the carrier wave of cell configuration, (1) defines I interval then according to the following equation:
That is, first interval be [0, p
1), i=1, other interval is
Wherein
L=1 ..., I, n
mThe minimum rank that dynamically keeps of representing Physical Random Access Channel on m the described carrier wave, m=1 ..., I.Then, produce one [0,1) equally distributed random digit rand, and (2) carry out the carrier wave preliminary election in the carrier wave in residue according to the following equation:
After choosing carrier wave, user terminal is selected a SYNC_UL at random from this carrier wave, this step can be identical with the selection step of Random Access Channel of definition among 3GPP 1.28Mcps TDD (time division duplex) the single carrier mobile radio system standard document 3GPP TS 25.331.
More than the accidental access method in the multicarrier system in the embodiment of the invention is described in detail, again the random access system in the multicarrier system in the embodiment of the invention is described in detail below.
Fig. 6 is the exemplary block diagram of the random access system in the multicarrier system in the embodiment of the invention.Shown in the solid line among Fig. 6, this system comprises: network side entity 6100 and user terminal 6200.
Wherein, network side entity 6100, be used for the mapping relations between the Random Access Channel of collocating uplink synchronous code, quick Acquisition Indicator Channel and Physical Random Access Channel and/or enhancing on each effective carrier wave of multicarrier system in advance, and the mapping relations that disposed are notified to user terminal 6200; Reception according to received uplink synchronous code, selects corresponding Acquisition Indicator Channel fast to respond to user terminal 6200 from the uplink synchronous code of user terminal 6200.Wherein, the configuration of mapping relations can be carried out according to several collocation methods of describing in the step 101 shown in Figure 2, also can be undertaken by other collocation method.
Further, network side entity 6100 is also measured the channel quality of the uplink synchronous channel on each effective carrier wave in the multicarrier system, set uplink synchronous channel quality scale on each effective carrier wave according to the measurement result of channel quality, according to the uplink synchronous channel quality scale on each effective carrier wave of being set up an office, set the dynamic maintenance rank of the Random Access Channel of related with it Physical Random Access Channel and/or enhancing, and the dynamic maintenance rank that will set is notified to user terminal 6200.Wherein, the channel quality of the uplink synchronous channel on each carrier wave equally can be by the interference level decision of the uplink synchronous channel on each carrier wave in the duration, and carry out channel quality measurement, the setting of uplink synchronous channel quality scale and dynamically keep the method for grade setting all can carry out, perhaps also can be undertaken by other method according to the description among the method embodiment.
Then user terminal 6200 is before carrying out the operation of selecting uplink synchronous code, further, the dynamic maintenance rank of the Physical Random Access Channel of being notified according to network side entity 6100 and/or the Random Access Channel of enhancing, from multicarrier system, select to desire bearing carrier wave, on selected carrier wave, carry out the operation of described selection uplink synchronous code.Wherein, user terminal 6200 selects to desire the method for bearing carrier wave from multicarrier system can be identical with the description among the method embodiment, perhaps different.
Wherein, network side entity 6100 can periodically be carried out the described operation that uplink synchronous channel quality scale on each carrier wave is set and the dynamic maintenance rank of the Random Access Channel of described Physical Random Access Channel and/or enhancing is set; And further, when the dynamic maintenance rank of the Random Access Channel of Physical Random Access Channel and/or enhancing changed, network side entity 6100 was notified to user terminal 6200 with described other change information of dynamic maintenance level.
During specific implementation, network side entity 6100 can have multiple specific implementation form, only enumerates wherein a kind of specific implementation to network side entity 6100 below and is described in detail.
Wherein, network control unit 6110, be used for the mapping relations between the Random Access Channel of collocating uplink synchronous code, quick Acquisition Indicator Channel and Physical Random Access Channel and/or enhancing on each effective carrier wave of multicarrier system in advance, and the mapping relations that disposed are notified to user terminal 6200 and base station unit 6120.
And further, the channel quality of the uplink synchronous channel in 6120 pairs of multicarrier systems of base station unit on each effective carrier wave is measured, set uplink synchronous channel quality scale on each effective carrier wave according to the measurement result of described channel quality, according to described uplink synchronous channel quality scale, set the dynamic maintenance rank of the Random Access Channel of related with it Physical Random Access Channel and/or enhancing, and the dynamic maintenance rank of described setting is notified to user terminal 6200.
Wherein, network control unit 6110 and base station unit 6120 can be respectively independent entity, are radio network controller (RNC) as network control unit 6110, and base station unit 6120 is base station (Node B); Perhaps network control unit 6110 and base station unit 6120 integrate, and constitute the base station (ENode B) that strengthens.
Fig. 7 shows a kind of structural representation of network control unit 6110.As shown in Figure 7, this network control unit 611 comprises: random access resource mapping block 6111, mapping relations notification module 6112.
Wherein, random access resource mapping block 6111 is used for the mapping relations between the Random Access Channel of collocating uplink synchronous code, quick Acquisition Indicator Channel and Physical Random Access Channel and/or enhancing on each effective carrier wave of multicarrier system in advance.Wherein, the configuration of mapping relations can be carried out according to several collocation methods of describing in the step 101 shown in Figure 1, also can be undertaken by other collocation method.
Mapping relations notification module 6112 is used for the described mapping relations of described random access resource mapping block 6111 configurations are notified to user terminal 6200 and base station unit 612.
Fig. 8 shows a kind of structural representation of base station unit 6120.Shown in the part of the solid line among Fig. 8, this base station unit 6120 comprises: channel response module 6121, be used to receive uplink synchronous code from user terminal 6200, according to the mapping relations between the Random Access Channel of uplink synchronous code, quick Acquisition Indicator Channel and Physical Random Access Channel and/or enhancing, select to respond to user terminal 6200, promptly respond indication information to user terminal 6200 with the corresponding quick Acquisition Indicator Channel of uplink synchronous code.
Further, shown in the dotted portion among Fig. 8, this base station unit 6120 also can comprise: channel quality measurement module 6122, quality scale setting module 6123, dynamically keep grade setting module 6124 and dynamically keep rank notification module 6125.
Wherein, channel quality measurement module 6122 is used for the channel quality of the uplink synchronous channel on each effective carrier wave of multicarrier system is measured, and the measurement result that obtains is offered quality scale setting module 6123.Wherein, the channel quality of the uplink synchronous channel on each carrier wave equally can be by the interference level decision of the uplink synchronous channel on each carrier wave in the duration.
Quality scale setting module 6123, the measurement result that provides according to channel quality measurement module 6122 is provided, set the uplink synchronous channel quality scale on each effective carrier wave, the uplink synchronous channel quality scale that sets is offered dynamic maintenance grade setting module 6124.Wherein, the method that the uplink synchronous channel quality scale is set all can be carried out according to the description among the method embodiment, perhaps also can be undertaken by other method.
Dynamically keep grade setting module 6124, the uplink synchronous channel quality scale that provides according to quality scale setting module 6123 is provided, set the dynamic maintenance rank of the Random Access Channel of Physical Random Access Channel related and/or enhancing with uplink synchronous channel.Wherein, dynamically keep the method for grade setting all can carry out, perhaps also can be undertaken by other method according to the description among the method embodiment.
Dynamically keep rank notification module 6125, be used for dynamically to keep the dynamic maintenance rank of the Random Access Channel of described Physical Random Access Channel that grade setting module 6124 sets and/or enhancing to be notified to user terminal 6200.
During specific implementation, user terminal 6200 also can have multiple specific implementation form, only enumerates wherein a kind of specific implementation to user terminal 6200 below and is described in detail.
Fig. 9 shows a kind of structural representation of user terminal 6200.Shown in the solid line among Fig. 9 part, this user terminal 6200 comprises: uplink synchronization request module 6210 and access module 6220 at random.
Wherein, uplink synchronization request module 6210, be used for basis from the mapping relations between the Random Access Channel of the uplink synchronous code of the multicarrier system of network side entity 6100, quick Acquisition Indicator Channel and Physical Random Access Channel and/or enhancing, select uplink synchronous code, and the described uplink synchronous code that will select sends to network side entity 6100.
Access module 6220 at random, are used to receive the response from the quick Acquisition Indicator Channel of network side entity 6100, according to described response, send random accessing message on the Random Access Channel of corresponding Physical Random Access Channel or enhancing.
Further, shown in the dotted portion among Fig. 9, this user terminal 6200 also can comprise: carrier wave is selected module 6230, be used in each carrier wave of multicarrier system, selecting to desire bearing carrier wave, the information of selected carrier wave is offered uplink synchronization request module 6210, and uplink synchronization request module 6210 selects to carry out on the module 6230 selected carrier waves operation of selecting uplink synchronous code at carrier wave.Wherein, carrier wave selects module 6230 to select to desire the method for bearing carrier wave from multicarrier system can be identical with the description among the method embodiment, perhaps difference.
For Fig. 7, Fig. 8 and network control unit 6110, base station unit 6120 and user terminal 6200 shown in Figure 9, the one of ordinary skilled in the art gives unnecessary details according to the also variable specific implementation form that swaps out other of the implementation in the present embodiment herein no longer one by one.
Collocating uplink synchronous code on the effective carrier wave of in multicarrier system each in advance among the present invention, mapping relations between the Random Access Channel of quick Acquisition Indicator Channel and Physical Random Access Channel and/or enhancing, and the mapping relations that disposed are notified to user terminal, thereby the resource on each carrier wave is carried out preassignment, select uplink synchronous code to send to network side by the described mapping relations of user terminal afterwards, network side is according to received uplink synchronous code and the mapping relations that disposed, select corresponding Acquisition Indicator Channel fast to respond indication information to user terminal, user terminal sends random accessing message according to the quick Acquisition Indicator Channel response that receives on the Random Access Channel of corresponding Physical Random Access Channel or enhancing.Thereby realized the distribution of random access resource in the multicarrier system.
Further, multicarrier system provide based on the dynamic maintenance rank of the Random Access Channel of Physical Random Access Channel on each carrier wave and/or enhancing with insert taking all factors into consideration of loading condition, come informing user terminal rapidly and flexibly to reselect other quality method of inserting at random of the uplink synchronous channel on the carrier wave preferably.Thereby farthest avoided user terminal because the Physical Random Access Channel on the selection low quality carrier wave and/or the Random Access Channel of enhancing, and the cost long time repeats access attempts at random, thereby shortens the trial time of user terminal in random access procedure.And, the present invention also can exist on the carrier wave serious disturb or situation than overdamp under, rapidly informing user terminal reselect other quality preferably the physical accidental channel on the carrier wave insert at random, thereby increased the success rate that inserts at random.
From such scheme as can be seen, collocating uplink access-in resource mapping structure on the effective carrier wave of in multicarrier system each in advance among the present invention, thereby the resource on each carrier wave is carried out preassignment, receive the uplink synchronous code that user terminal sends afterwards, according to the mapping relations that disposed, select the quick Acquisition Indicator Channel corresponding to respond indication information to user terminal with uplink synchronous code, and with the corresponding access channel of described indication information on continue access operation at random, thereby realized the distribution of random access resource in the multicarrier system.
Further, multicarrier system among the present invention provides based on the dynamic maintenance rank of the Random Access Channel of Physical Random Access Channel on each carrier wave and/or enhancing and taking all factors into consideration of access loading condition, with informing user terminal rapidly and neatly reselect other quality preferably the uplink synchronous channel on the carrier wave insert at random, thereby increased the success rate that inserts at random.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. the accidental access method in the multicarrier system, it is characterized in that, mapping relations between the Random Access Channel of collocating uplink synchronous code on the effective carrier wave of each in multicarrier system, Acquisition Indicator Channel, Physical Random Access Channel and/or enhancing fast in advance, and described mapping relations are notified to user terminal;
This method comprises: receive the uplink synchronous code from user terminal, according to described mapping relations, select to respond indication information to user terminal with the corresponding quick Acquisition Indicator Channel of described uplink synchronous code, and with the Random Access Channel of corresponding Physical Random Access Channel of described indication information or enhancing on receive random accessing message from user terminal.
2. the method for claim 1, it is characterized in that the mapping relations between the Random Access Channel of collocating uplink synchronous code on the effective carrier wave of described each in multicarrier system in advance, Acquisition Indicator Channel, Physical Random Access Channel and/or enhancing fast are: the mapping relations between the Random Access Channel of the uplink synchronous code that disposed on the main carrier in the multicarrier system, Acquisition Indicator Channel and Physical Random Access Channel and/or enhancing are fast directly copied on effective subcarrier in the multicarrier system;
Perhaps be: dispose the mapping relations between the Random Access Channel of independent uplink synchronous code, fast Acquisition Indicator Channel and Physical Random Access Channel and/or enhancing respectively for each the effective carrier wave in the multicarrier system, mapping relations on described each carrier wave are different, or part is identical;
Perhaps be: the Random Access Channel of configures physical Random Access Channel and/or enhancing on the main carrier in multicarrier system, and the main carrier in multicarrier system and effectively collocating uplink synchronous code and Acquisition Indicator Channel fast on the subcarrier, and with the uplink synchronous code that disposed and fast Acquisition Indicator Channel be mapped on the Random Access Channel of the described Physical Random Access Channel that disposes on the main carrier and/or enhancing.
3. the method for claim 1 is characterized in that, describedly described mapping relations are notified to user terminal are: by broadcast described mapping relations are notified to user terminal.
4, as each described method in the claim 1 to 3, it is characterized in that, this method further comprises: the channel quality to the uplink synchronous channel on each effective carrier wave in the multicarrier system is measured, set uplink synchronous channel quality scale on each effective carrier wave according to the measurement result of described channel quality, according to described uplink synchronous channel quality scale, the dynamic maintenance rank of the Random Access Channel of corresponding physical Random Access Channel with it and/or enhancing is set, and the dynamic maintenance rank of described setting is notified to user terminal;
Described uplink synchronous code from user terminal is: user terminal is according to the dynamic maintenance rank of the Random Access Channel of described Physical Random Access Channel and/or enhancing, from multicarrier system, select to desire bearing carrier wave, the uplink synchronous code of on selected carrier wave, selecting.
5, method as claimed in claim 4, it is characterized in that, described channel quality to the uplink synchronous channel on each effective carrier wave in the multicarrier system is measured, the uplink synchronous channel quality scale of setting on each effective carrier wave according to the measurement result of described channel quality is: network side is measured the interference level of uplink synchronous channel in the transmission time on each effective carrier wave in the multicarrier system, received power according to the uplink synchronous channel of measured value that obtains and expectation, determine the uplink synchronous channel wanted to interfering signal ratio on each carrier wave, described uplink synchronous channel wanted to interfering signal ratio and the uplink synchronous channel wanted to interfering signal ratio threshold value set of being scheduled to are compared, according to comparative result, set the uplink synchronous channel quality scale on each carrier wave.
6, method as claimed in claim 4 is characterized in that, and is described according to described uplink synchronous channel quality scale, and the dynamic maintenance rank that the Random Access Channel of corresponding physical Random Access Channel with it and/or enhancing is set comprises:
If the current quality scale that is set of uplink synchronous channel with its before the quality scale that once is set mutually specific damping the k level, the dynamic maintenance rank of then setting the Random Access Channel of related with it whole Physical Random Access Channels and/or enhancing increases k level or 2k level, if the dynamic maintenance rank after the Random Access Channel of described Physical Random Access Channel and/or enhancing increases is greater than maximum level, setting described dynamic maintenance rank is maximum level;
If comparing with the quality scale that once is set before it, the current quality scale that is set of uplink synchronous channel increased the k level, and when the load of the access on the Random Access Channel of Guan Lian Physical Random Access Channel and/or enhancing is not high with it, the dynamic maintenance rank of then setting the Random Access Channel of described Physical Random Access Channel and/or enhancing reduces k level or 2k level, if the dynamic maintenance rank after the Random Access Channel of described Physical Random Access Channel and/or enhancing reduces is less than minimal level, setting described dynamic maintenance rank is minimal level; Wherein, k is a positive integer.
7, method as claimed in claim 6 is characterized in that, this method further comprises: preestablish dynamic maintenance level threshold; When the dynamic maintenance rank of the Random Access Channel of whole Physical Random Access Channels on the carrier wave and/or enhancing is equal to or greater than described dynamic maintenance level threshold, when user terminal is selected to desire bearing carrier wave from multicarrier system, directly forbid selection to described carrier wave, wherein, minimal level＜dynamically keep level threshold＜=maximum level.
8, a kind of network control unit is characterized in that, this network control unit comprises:
Random access resource mapping block (6111) is used for the mapping relations between the Random Access Channel of collocating uplink synchronous code, Acquisition Indicator Channel, Physical Random Access Channel and/or enhancing fast on each effective carrier wave of multicarrier system in advance;
Mapping relations notification module (6112) is used for the described mapping relations of described random access resource mapping block (6111) configuration are notified to user terminal (6200) and base station unit (6120).
9, a kind of base station unit is characterized in that, this base station unit comprises:
Channel response module (6121), be used for receiving uplink synchronous code from user terminal (6200), according to the mapping relations between the Random Access Channel of uplink synchronous code, Acquisition Indicator Channel, Physical Random Access Channel and/or enhancing fast in the multicarrier system, select to respond indication information to user terminal (6200) with the corresponding quick Acquisition Indicator Channel of uplink synchronous code.
10, base station unit as claimed in claim 9 is characterized in that, described base station unit (6120) further comprises:
Channel quality measurement module (6122) is used for the channel quality of the uplink synchronous channel on each effective carrier wave of multicarrier system is measured, and the measurement result that obtains is offered the quality scale setting module;
Quality scale setting module (6123), the measurement result that provides according to described channel quality measurement module (6122) is provided, set the uplink synchronous channel quality scale on each effective carrier wave, the uplink synchronous channel quality scale of described setting is offered dynamic maintenance grade setting module (6124);
Dynamically keep grade setting module (6124), the described uplink synchronous channel quality scale that provides according to described quality scale setting module (6123) is provided, sets the dynamic maintenance rank of the Random Access Channel of Physical Random Access Channel related and/or enhancing with uplink synchronous channel;
Dynamically keep rank notification module (6125), be used for the dynamic maintenance rank of the Random Access Channel of the described Physical Random Access Channel of described dynamic maintenance grade setting module settings and/or enhancing is notified to user terminal (6200).
11, a kind of user terminal is characterized in that, this user terminal comprises:
Uplink synchronization request module (6210), be used for basis from the mapping relations between the Random Access Channel of the uplink synchronous code of the multicarrier system of network side entity (6100), quick Acquisition Indicator Channel, Physical Random Access Channel and/or enhancing, select uplink synchronous code, and the described uplink synchronous code that will select sends to network side entity (6100);
Access module (6220) is used for receiving the response from the quick Acquisition Indicator Channel of network side entity (6100) at random, according to described response, sends random accessing message on the Random Access Channel of corresponding Physical Random Access Channel or enhancing.
12, user terminal as claimed in claim 11, it is characterized in that, this user terminal further comprises: carrier wave is selected module (6230), be used for dynamic maintenance rank according to the Random Access Channel of Physical Random Access Channel and/or enhancing, select to desire bearing carrier wave in each carrier wave in multicarrier system, the information of selected carrier wave is offered uplink synchronization request module (6210);
Described uplink synchronization request module (6210) is selected uplink synchronous code on the described carrier wave that described carrier wave selects module (6230) to select.
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