CN101516140A

CN101516140A - Transmission method of random access response, transmission base station and receiving terminal

Info

Publication number: CN101516140A
Application number: CNA2009101277190A
Authority: CN
Inventors: 郝鹏; 朱鹏; 喻斌
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2009-03-18
Filing date: 2009-03-18
Publication date: 2009-08-26

Abstract

The invention discloses a transmission method of random access response, a transmission base station and a receiving terminal, and solves problem of system resource waste by transmitting random access response when up member carrier corresponds to a plurality of down member carriers. A transmission method includes that the base station determines to transmit one down member carrier of the random access response according to notification of the terminal, and the base station only transmits the random access response on the down member carrier; or the base station notifies the terminal that the base station transmits one down member carrier of the random access response, and the base station transmits the random access response on the down member carrier; or the base station and the terminal are agreed in advance that one down member carrier is used for bearing the random access response, and the base station transmits the random access response on the down member carrier.

Description

A kind of transmission method of accidental access response and transmission base station and receiving terminal

Technical field

The present invention relates to the LTE-Advanced system of the communications field, relate in particular to and a kind ofly transmit the method for accidental access response and relate to the base station of transmission and the terminal of reception.

Background technology

LTE-Advanced system (Long Term Evolution-Advanced is called for short the LTE-A system) is the evolution system of future generation of LTE system, and it 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 a member carrier (component carrier), as shown in Figure 1.Can be continuous between the member carrier, also can be discontinuous.

Downlink member carrier in the LTE-A system can have synchronizing channel (comprising primary synchronization channel, auxiliary synchronization channel) and broadcast channel.Broadcast channel on one " downlink member carrier " refers to the channel of the broadcast of having carried certain carrier wave or certain several carrier wave or whole sub-district herein, these message can (or be called UE by the whole terminals in the sub-district, User Equipment, subscriber equipment) or all terminals that have a certain same alike result in the sub-district receive.In addition, broadcast channel herein can refer to the physical channel of physical layer, also can refer to the transmission channel of MAC sublayer (media access control sublayer) or the logic channel of radio resource (rrc layer).The information of broadcast channels carry common also can be called system information (System Information).The information of broadcast channel broadcasts has multiple, wherein 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.Physical Random Access Channel is called for short PRACH (Physical RandomAccess Channel).Some concrete Physical Random Access Channels take when certain, resource frequently, also can be called physical accidental channel chance (being PRACH opportunity) or be called and insert chance (being Random Access Opportunity) at random.

Resource allocation in the LTE system is with Physical Resource Block (Physical Resource Block, PRB, or abbreviate Resource Block as, Resource Block) is unit, a PRB accounts for 12 subcarrier (subcarrier on frequency domain, or be called Resource Element, abbreviate RE as, each subcarrier is 15kHz), on time domain, account for a time slot, promptly on time domain, occupy 7 regular circulation prefix (Normal cyclicprefix, abbreviate Normal CP as) or 6 extended cyclic prefix (Extended cyclic prefix, abbreviate Extended CP as) SC-FDMA (Single Carrier Frequency Division MultipleAccess, single carrier frequency division is multiplexing) symbol.If up-link bandwidth corresponding PRB on frequency domain adds up to N _RB ^UL, then the index of PRB be 0,1 ..., N _RB ^UL-1, the index of RE is 0,1 ..., N _RB ^ULN _SC ^RB-1, wherein, N _SC ^RBIt is a PRB pairing sub-carrier number on frequency domain.With the regular circulation prefix is example, and the structure of PRB as shown in Figure 2.

In the LTE system, the Physical Random Access Channel configuration parameter includes but not limited to the logic index of the employed article one root of (1) Physical Random Access Channel sequence; (2) frequency domain initial position; (3) configuration index of Physical Random Access Channel.

In the LTE system, Physical Random Access Channel uses the cyclically shifted sequences of Zadoff-Chu (being called for short ZC) sequence as targeting sequencing (Preamble Sequence), these cyclically shifted sequences can be called zero correlation zone (Zero Correlation Zone is called for short ZCZ) sequence again.At first carry out down-going synchronous after the starting up of terminal, begin to detect broadcast channel (Broadcast Channel is called for short BCH) afterwards.The base station is by the logic index of the operable article one ZC sequence of broadcast channel notice this sub-district Physical Random Access Channel of terminal and the step-length (being the cyclic shift amount) of cyclic shift, terminal utilizes certain mapping ruler to obtain the physics index of ZC sequence from the logic index according to index, generates available ZCZ sequence according to step length of cyclic shift and certain " cyclic shift restriction rule " then.(in the LTE system, M=64), then the automatic increasing sequence logic of terminal index utilizes next bar ZC sequence to continue to generate the ZCZ sequence, till the sum of ZCZ sequence equals above-mentioned threshold value if the quantity of ZCZ sequence is less than threshold value M.At last, terminal selects one to send as random access leader sequence (hereinafter to be referred as leading) in the available ZCZ sequence of all generations at random.

The structure of random access guiding is made up of Cyclic Prefix (CP) and sequence (Sequence) two parts as shown in Figure 3.A random access guiding accounts for 6 continuous Resource Block at frequency domain.Different leading forms have different Cyclic Prefix and sequence length on time domain, as shown in table 1 (T wherein _s=1/ (15000 * 2048) second).

Table 1

Preamble format

T _CP

T _SEQ

0	3168·T _S	24576·T _s
0	3168·T _S	24576·T _s	1	21024·T _s	24576·T _s
2	6240·T _s	2·24576·T _s	1	21024·T _s	24576·T _s
2	6240·T _s	2·24576·T _s	3	21024·T _s	2·24576·T _s
4 (only being used for tdd mode)	448·T _s	4096·T _s	3	21024·T _s	2·24576·T _s

In the LTE system, the PRACH channel is at the index n of first shared PRB of frequency domain _PRBoffset ^RABy base station notice terminal, span is by signaling

0 \leq n_{PRBoffset}^{RA} \leq N_{RB}^{UL} - 6 .

In the terminal access procedure of LTE-A system, terminal at first utilizes the synchronizing channel on the downlink member carrier to finish down-going synchronous.On this downlink member carrier, receive broadcast channel then, obtain pairing frequency, bandwidth and the corresponding Physical Random Access Channel configuration parameter that the uplink member carrier of Physical Random Access Channel is arranged of this downlink member carrier.Then, terminal has at this and sends the physical accidental access lead on uplink member carrier of Physical Random Access Channel, carries out uplink synchronous.The base station is detected the random access guiding that receives, and obtains the Timing Advance of terminal, and afterwards, the base station sends with leading corresponding accidental access response (Random Access Response is called for short RAR) and gives terminal.Terminal utilizes the Timing Advance in the accidental access response to adjust the transmitting time of upward signal.Above-mentioned terminal can be one, also can be a plurality of.

When the up-link carrier of notifying when the broadcast channel of a plurality of downlink member carriers that Physical Random Access Channel is arranged was identical, one had the uplink member carrier of Physical Random Access Channel will corresponding a plurality of downlink member carriers.That is to say when a plurality of terminals send the physical accidental access lead on identical uplink member carrier, the base station will not know which terminal to send the accidental access response that has Timing Advance on which downlink member carrier.Present processing is that the base station will all send accidental access response on all downlink member carriers, caused resource waste.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of transmission method and transmission base station and receiving terminal of accidental access response, solves the problem that sends accidental access response waste system resource when a plurality of downlink member carrier of uplink member carrier correspondence.

In order to solve the problems of the technologies described above, the invention provides the sending method of accidental access response in a kind of wireless communication system, comprise: the base station is according to the definite downlink member carrier that sends accidental access response of the notice of terminal, and the base station only sends accidental access response on this downlink member carrier.

Further, terminal is by employed random access guiding and/or the employed uplink member carrier informing base station of transmission random access guiding.

Further, the own down-going synchronous of described terminal informing base station is on which downlink member carrier, and the base station only sends accidental access response on this downlink member carrier.

Further, described method further comprises: a plurality of downlink member carriers are one group, every group of corresponding uplink member carrier of downlink member carrier, the terminal down-going synchronous is behind a certain downlink member carrier, and described terminal sends random access guiding on the uplink member carrier of the downlink member carrier group correspondence under this downlink member carrier; Described base station sends the employed uplink member carrier of random access guiding according to terminal, perhaps according to employed random access guiding of terminal and the employed uplink member carrier of transmission random access guiding, determine to send a downlink member carrier of accidental access response, and on this downlink member carrier of determining, send accidental access response.

Further, described base station determines that according to the employed uplink member carrier of terminal transmission random access guiding the step that sends a downlink member carrier of accidental access response and send accidental access response on this downlink member carrier comprises:

The base station is provided with a downlink member carrier that is used to send accidental access response in each downlink member carrier group, and is used to send accidental access response by which downlink member carrier in the described terminal downlink member carrier of the signaling group; Described base station is determined the downlink member carrier group that described uplink member carrier is corresponding according to uplink member carrier and described uplink member carrier that described terminal sends the random access guiding place with the corresponding relation of downlink member carrier group, and sends accidental access response on the downlink member carrier that is provided with in this downlink member carrier group;

Perhaps, described base station is determined the downlink member carrier group that described uplink member carrier is corresponding according to uplink member carrier and uplink member carrier that described terminal sends the random access guiding place with the corresponding relation of downlink member carrier group, the a certain downlink member carrier that base station and terminal are made an appointment in the described downlink member carrier group is used to send accidental access response, and the base station sends accidental access response on this downlink member carrier.

Further, described signaling broadcast transmission in the second type systematic block of information SIB2.

Further, described base station determines that according to employed random access guiding of terminal and the employed uplink member carrier of transmission random access guiding the step that sends a downlink member carrier of accidental access response and send accidental access response on this downlink member carrier comprises:

Preserve the corresponding relation of each downlink member carrier and one group of random access guiding on the described base station; Described base station is determined the downlink member carrier group that described uplink member carrier is corresponding according to uplink member carrier and uplink member carrier that described terminal sends the random access guiding place with the corresponding relation of downlink member carrier group, determine the terminal down-going synchronous on which downlink member carrier according to the random access guiding that terminal is used, described base station sends accidental access response on this downlink member carrier.

Further, described method further comprises: the corresponding relation of preserving each downlink member carrier and one group of random access guiding on the described base station; Described base station is according to the corresponding relation of the employed random access guiding of terminal and downlink member carrier and random access guiding, determine the downlink member carrier of described terminal down-going synchronous, described base station only sends accidental access response on the downlink member carrier of described terminal synchronizes.

Further, terminal one of in the following manner knows that downlink member carrier group and which uplink member carrier have corresponding relation: the frequency of same uplink member carrier has been notified in the base station on each downlink member carrier of downlink member carrier group; The frequency of same uplink member carrier has been notified in the base station on each downlink member carrier of downlink member carrier group, and has all notified the configuration parameter of the Physical Random Access Channel on this uplink member carrier on these downlink member carriers; Each downlink member carrier of downlink member carrier group points to the frequency of same uplink member carrier by acquiescence sending and receiving frequency interval; Each downlink member carrier of downlink member carrier group points to the frequency of same uplink member carrier by acquiescence sending and receiving frequency interval, and has all notified the configuration parameter of the Physical Random Access Channel on this uplink member carrier on these downlink member carriers; Terminal is preserved the corresponding relation of downlink member carrier group and uplink member carrier in advance.

For solving the problems of the technologies described above, the present invention also provides the sending method of accidental access response in a kind of wireless communication system, comprise: it sends a downlink member carrier of accidental access response base station notice terminal, and the base station sends accidental access response on this downlink member carrier.

Further, described base station is the broadcast transmission signaling in the second type systematic block of information SIB2, is used to notify terminal receiving random access response to which downlink member carrier.

For solving the problems of the technologies described above, the present invention also provides the sending method of accidental access response in a kind of wireless communication system, comprising: base station and the terminal a certain downlink member carrier of making an appointment is used to carry accidental access response; Described base station sends accidental access response on this downlink member carrier.

For solving the problems of the technologies described above, the present invention also provides the base station that sends accidental access response in a kind of wireless communication system, comprises receiving element, control unit and transmitting element, wherein:

Receiving element is used for the notice of receiving terminal;

Control unit is used for according to the definite downlink member carrier that sends accidental access response of the notice of terminal;

Described transmitting element is used for sending accidental access response according to the indication of described control unit on a downlink member carrier of determining.

Further, described receiving element is further used for the random access guiding that receiving terminal sends on a certain uplink synchronous carrier wave; Described control unit is further used for according to the employed random access guiding of terminal and/or sends the downlink member carrier that the employed uplink member carrier of random access guiding determines to send accidental access response.

Further, described base station also comprises memory cell, and described memory cell is used to store the downlink member carrier that every group of downlink member carrier comprises, and the pairing uplink member carrier of each downlink member carrier group; Described control unit is further used for sending the employed uplink member carrier of random access guiding according to terminal, perhaps according to employed random access guiding of terminal and the employed uplink member carrier of transmission random access guiding, according to the corresponding relation of the uplink member carrier and the downlink member carrier group of described cell stores, determine to send a downlink member carrier of accidental access response again.

Further, described control unit sends a downlink member carrier of the definite transmission of the employed uplink member carrier of random access guiding accidental access response and indicates described transmitting element to send according to terminal and is meant:

Described control unit is provided with a downlink member carrier that is used to send accidental access response in each downlink member carrier group, and is used to send accidental access response by which downlink member carrier in the described terminal downlink member carrier of the signaling group; Described control unit sends the uplink member carrier at random access guiding place according to described terminal and the uplink member carrier of described cell stores is determined the downlink member carrier group that described uplink member carrier is corresponding with the corresponding relation of downlink member carrier group, determines to send the downlink member carrier of accidental access response thus; Described control unit indicates described transmitting element to send described signaling, and sends accidental access response on this downlink member carrier;

Perhaps, described memory cell is preserved a certain downlink member carrier that downlink member carrier group internal fixation that described base station and terminal make an appointment is used to send accidental access response; Described control unit sends the uplink member carrier at random access guiding place according to described terminal and the uplink member carrier of described cell stores is determined the downlink member carrier group that described uplink member carrier is corresponding with the corresponding relation of downlink member carrier group, this downlink member carrier group internal fixation that described control unit is preserved according to described memory cell is used to send the downlink member carrier of accidental access response, indicates described transmitting element to send accidental access response on this downlink member carrier.

Further, described control unit is determined a downlink member carrier of transmission accidental access response and indicates described transmitting element to send to be meant according to employed random access guiding of terminal and the employed uplink member carrier of transmission random access guiding:

One group of random access guiding of each downlink member carrier correspondence that the downlink member carrier group that described cell stores has described base station and terminal to make an appointment is interior; Described control unit is further used for determining the downlink member carrier group that described uplink member carrier is corresponding according to the uplink member carrier at described terminal transmission random access guiding place and the uplink member carrier of described cell stores with the corresponding relation of downlink member carrier group, determine the downlink member carrier of terminal notice according to the random access guiding that terminal is used, and indicate described transmitting element on this downlink member carrier, to send accidental access response;

Perhaps, described control unit is notified one group of random access guiding of this downlink member carrier correspondence of terminal in advance on each downlink member carrier; After receiving that terminal sends random access guiding, determine the downlink member carrier group that described uplink member carrier is corresponding according to the uplink member carrier at described terminal transmission random access guiding place and the uplink member carrier of described cell stores with the corresponding relation of downlink member carrier group, determine the downlink member carrier of terminal notice according to the random access guiding that terminal is used, and indicate described transmitting element on this downlink member carrier, to send accidental access response.

Further, described base station also comprises memory cell, and described memory cell is used to store the corresponding relation of each downlink member carrier and one group of random access guiding; Described control unit is further used for according to the downlink member carrier of employed random access guiding of terminal and preservation and the corresponding relation of random access guiding, determine the downlink member carrier of described terminal notice, indicate described transmitting element on described downlink member carrier, to send accidental access response.

Described receiving element is used for the random access guiding that receiving terminal sends;

Described control unit, be used for behind the random access guiding that receives the terminal transmission, make up signaling be used to notify described terminal its will on which downlink member carrier, send accidental access response, and indicate described transmitting element on this downlink member carrier, to send accidental access response;

Described transmitting element is used for sending signaling according to the indication of described control unit, and sends accidental access response on the downlink member carrier of described control unit indication.

Further, described transmitting element sends signaling in the second type systematic block of information SIB2.

For solving the problems of the technologies described above, the present invention also provides the base station that sends accidental access response in a kind of wireless communication system, comprises memory cell, receiving element, control unit and transmitting element, wherein:

Described memory cell is used to store the downlink member carrier that is used to send accidental access response that described base station and terminal are made an appointment;

Described control unit is used for indicating described transmitting element to send accidental access response on the downlink member carrier of described agreement behind the random access guiding that receives the terminal transmission;

Described transmitting element is used for sending accidental access response on the downlink member carrier of described control unit indication.

For solving the problems of the technologies described above, the present invention also provides the method for receiving random access response in a kind of wireless communication system, comprising: the terminal informing base station sends accidental access response on some downlink member carriers; Described terminal is receiving random access response on that downlink member carrier of informing base station.

Further, terminal is by employed random access guiding and the employed uplink member carrier informing base station of transmission random access guiding.

Further, that downlink member carrier of described terminal informing base station is the downlink member carrier at described terminal down-going synchronous place.

Further, a plurality of downlink member carriers are one group, every group of corresponding uplink member carrier of downlink member carrier; And corresponding one group of random access guiding of each downlink member carrier; The step of described terminal informing base station further comprises: the terminal down-going synchronous is behind a certain downlink member carrier, described terminal sends random access guiding on the uplink member carrier of the downlink member carrier group correspondence under this downlink member carrier, and the random access guiding in the random access guiding group of this downlink member carrier correspondence of selection use.

Further, described terminal by with the making an appointment or know one group of random access guiding that each downlink member carrier is corresponding in each downlink member carrier of base station by the random access guiding group that the base station is notified; Described terminal is when sending random access guiding, determine one group of random access guiding according to the downlink member carrier of its down-going synchronous, and therefrom select a random access guiding to use, the downlink member carrier that is used for the described terminal down-going synchronous of informing base station is so that described base station sends accidental access response on this downlink member carrier.

For solving the problems of the technologies described above, the present invention also provides the method for receiving random access response in a kind of wireless communication system, comprising: it determines to send accidental access response on which downlink member carrier by the signaling terminal in the base station; Terminal receives the signaling that described base station sends, receiving random access response on the downlink member carrier of base station indication.

Further, described method further comprises: a plurality of downlink member carriers are one group, every group of corresponding uplink member carrier of downlink member carrier, the terminal down-going synchronous is behind a certain downlink member carrier, and described terminal sends random access guiding on the uplink member carrier of the downlink member carrier group correspondence under this downlink member carrier; Described base station is provided with a downlink member carrier that is used to send accidental access response in each downlink member carrier group, send the employed uplink member carrier of random access guiding according to terminal and determine a descending member carrier group, and definite downlink member carrier that sends accidental access response, send the signaling of indicating this downlink member carrier to terminal, described terminal is receiving random access response on the downlink member carrier of described base station indication.

For solving the problems of the technologies described above, the present invention also provides the method for receiving random access response in a kind of wireless communication system, comprise: base station and terminal agreement send a downlink member carrier of accidental access response, and described terminal is receiving random access response on the downlink member carrier of agreement.

Further, described method further comprises: a plurality of downlink member carriers are one group, the a certain downlink member carrier that the corresponding uplink member carrier of every group of downlink member carrier, described base station and terminal are made an appointment in the downlink member carrier group is used to send accidental access response; The terminal down-going synchronous is behind a certain downlink member carrier, and described terminal sends random access guiding on the uplink member carrier of the downlink member carrier group correspondence under this downlink member carrier; And with this downlink member carrier group of base station agreement in be used to send receiving random access response on the downlink member carrier of accidental access response.

For solving the problems of the technologies described above, the present invention also provides the terminal of receiving random access response in a kind of wireless communication system, comprises control unit and receiving element, wherein:

Described control unit is used for informing base station and sends accidental access response on some downlink member carrier, and indicates described receiving element receiving random access response on this downlink member carrier;

Described receiving element is used for receiving random access response on the downlink member carrier of described control unit indication.

Further, described control unit is further by employed random access guiding and the employed uplink member carrier informing base station of transmission random access guiding.

Further, that downlink member carrier of described control informing base station is the downlink member carrier at described terminal down-going synchronous place.

Further, one group of downlink member carrier comprises one or several downlink member carriers, a uplink member carrier of each downlink member carrier group correspondence, the corresponding one group of random access guiding of each downlink member carrier, described terminal also comprises memory cell: described memory cell is used to store the downlink member carrier that every group of downlink member carrier comprises; Described control unit is further used in the terminal down-going synchronous behind a certain downlink member carrier, be chosen on the uplink member carrier of the downlink member carrier group correspondence under this downlink member carrier and send random access guiding, and select to use a random access guiding in the random access guiding group of this downlink member carrier correspondence.

Further, one group of downlink member carrier comprises one or several downlink member carriers, a uplink member carrier of each downlink member carrier group correspondence, the corresponding one group of random access guiding of each downlink member carrier, described terminal also comprises memory cell: described memory cell is used to store the downlink member carrier that every group of downlink member carrier comprises; Described control unit is further used for when sending random access guiding, determine a random access guiding group according to the downlink member carrier of its down-going synchronous and the corresponding relation of downlink member carrier and random access guiding group, and therefrom select a random access guiding to use, the downlink member carrier that is used for the described terminal down-going synchronous of informing base station is so that described base station sends accidental access response on this downlink member carrier.

Further, described control unit one of in the following manner knows that downlink member carrier group and which uplink member carrier have corresponding relation: the frequency of the same uplink member carrier that the base station is notified on each downlink member carrier of downlink member carrier group; The frequency of the same uplink member carrier that the base station is notified on each downlink member carrier of downlink member carrier group, and all notified the configuration parameter of the Physical Random Access Channel on this uplink member carrier on these downlink member carriers; Each downlink member carrier of downlink member carrier group is by the frequency of the same uplink member carrier of acquiescence sending and receiving frequency interval sensing; Each downlink member carrier of downlink member carrier group passes through the frequency of the same uplink member carrier of acquiescence sending and receiving frequency interval sensing, and has all notified the configuration parameter of the Physical Random Access Channel on this uplink member carrier on these downlink member carriers; The downlink member carrier group that described terminal is preserved in advance and the corresponding relation of uplink member carrier.

Described receiving element, be used to receive the signaling that the base station sends, described signaling is used to notify this base station of terminal to send accidental access response on which downlink member carrier, and is used for receiving random access response on the downlink member carrier of described control unit indication;

Described control unit is used for the signaling that issues according to described base station, determines that the base station sends a downlink member carrier of accidental access response, indicates described receiving element receiving random access response on this downlink member carrier of base station indication.

Further, one group of downlink member carrier comprises one or several downlink member carriers, a uplink member carrier of each downlink member carrier group correspondence, described terminal also comprises a memory cell and a transmitting element, described memory cell is used to store the downlink member carrier that every group of downlink member carrier comprises; Described control unit is further used in the terminal down-going synchronous indicating described transmitting element to send random access guiding on the uplink member carrier of the downlink member carrier group correspondence under this downlink member carrier behind a certain downlink member carrier; And, determine that from described downlink member carrier group the base station sends a downlink member carrier of accidental access response according to the signaling that described base station issues; Described transmitting element is used for sending random access guiding on the uplink member carrier of the indication of described control unit.

For solving the problems of the technologies described above, the present invention also provides the terminal of receiving random access response in a kind of wireless communication system, it is characterized in that, comprises memory cell, control unit and receiving element, wherein:

Described memory cell is used to store the downlink member carrier that one of described terminal and base station agreement is used for receiving random access response;

Described control unit is used to indicate described receiving element receiving random access response on the downlink member carrier of described agreement;

Further, one group of downlink member carrier comprises one or several downlink member carriers, a uplink member carrier of each downlink member carrier group correspondence, described terminal also comprises transmitting element: described memory cell is further used for storing the downlink member carrier that every group of downlink member carrier comprises, and with each downlink member carrier group of base station agreement in be used for the downlink member carrier of receiving random access response; Described control unit is further used in the terminal down-going synchronous indicating described transmitting element to send random access guiding on the uplink member carrier of the downlink member carrier group correspondence under this downlink member carrier behind a certain downlink member carrier; And indicate described receiving element with this downlink member carrier group of described base station agreement in a descending member carrier on receiving random access response; Described transmitting element is used for sending random access guiding on the uplink member carrier of the indication of described control unit.

Adopt the method for the invention to determine that the downlink member carrier of transmission accidental access response can make full use of the resource of uplink and downlink member carrier, reduce the wasting of resources, improve usage factor of system resource, can avoid again simultaneously the configuration of Physical Random Access Channel is produced excessive restriction.

Description of drawings

Fig. 1 is a LTE-A system carrier aggregation schematic diagram;

Fig. 2 is the Physical Resource Block structural representation;

Fig. 3 is the random access guiding structural representation;

Fig. 4 is a random access response transmitting method schematic diagram in the embodiment of the invention one;

Fig. 5 is a random access response transmitting method schematic diagram in the embodiment of the invention two;

Fig. 6 is a random access response transmitting method schematic diagram in the embodiment of the invention three.

Embodiment

Design of the present invention is: the base station only sends accidental access response for certain terminal on a downlink member carrier.Can adopt one of following method:

Method one, the base station is according to the definite downlink member carrier that sends accidental access response of the notice of terminal, and the base station only sends accidental access response on this downlink member carrier.

Preferably, terminal is by employed random access guiding and/or the employed uplink member carrier informing base station of transmission random access guiding.

Preferably, terminal sends random access guiding to the base station, the base station is according to the employed random access guiding of terminal and/or send the downlink member carrier that the employed uplink member carrier of random access guiding is determined the terminal down-going synchronous, the base station sends the accidental access response of this terminal on this downlink member carrier, terminal is receiving random access response on the downlink member carrier of own down-going synchronous.

Downlink member carrier can be divided into the N group, N is a positive integer.Every group of corresponding uplink member carrier of downlink member carrier.After terminal is finished down-going synchronous, down-going synchronous is to a certain downlink member carrier, this terminal uses the uplink member carrier corresponding with the downlink member carrier place group of down-going synchronous to send random access guiding, the downlink member carrier group at the downlink member carrier place of this terminal down-going synchronous is judged according to the uplink member carrier of terminal use in the base station.

Terminal one of in the following manner knows that downlink member carrier group and which uplink member carrier have corresponding relation:

The frequency of same uplink member carrier has been notified in the base station on each downlink member carrier of downlink member carrier group;

The frequency of same uplink member carrier has been notified in the base station on each downlink member carrier of downlink member carrier group, and has all notified the configuration parameter of the Physical Random Access Channel on this uplink member carrier on these downlink member carriers;

Each downlink member carrier of downlink member carrier group points to the frequency of same uplink member carrier by acquiescence sending and receiving frequency interval;

Each downlink member carrier of downlink member carrier group points to the frequency of same uplink member carrier by acquiescence sending and receiving frequency interval, and has all notified the configuration parameter of the Physical Random Access Channel on this uplink member carrier on these downlink member carriers;

Terminal is preserved the corresponding relation of downlink member carrier group and uplink member carrier in advance.

Some downlink member carriers that the base station can be provided with in certain downlink member carrier group are used to send accidental access response, and notify the downlink member carrier at its accidental access response place that will send of terminal by signaling (for example broadcasting in SIB2); Perhaps, base station and terminal can be arranged, and for certain group downlink member carrier, are fixed in the group and send accidental access response on some downlink member carriers, a downlink member carrier that sends accidental access response is determined according to agreement in advance in the base station when sending accidental access response like this; Perhaps, base station and terminal can be arranged the pairing downlink member carrier of different random access lead, terminal sends accidental access response by carrying different random access guiding informing base stations on the corresponding downstream member carrier, the downlink member carrier of accidental access response is determined to send in the base station according to the employed random access guiding of terminal.

Can use random access guiding to distinguish each downlink member carrier in the downlink member carrier group or distinguish all downlink member carriers.Random access guiding can be divided into many groups (for example by strange, even number sequence number), the downlink member carrier that different random access guiding groups is corresponding different, each downlink member carrier in the perhaps corresponding same downlink member carrier group according to certain rule.The base station can adopt the mode of agreement to determine the random access guiding group of different downlink member carrier correspondences with terminal, perhaps the random access guiding group of each downlink member carrier correspondence of terminal also can be informed by the mode of notice in the base station, and for example the base station notifies current downlink member carrier (i.e. oneself) pairing random access guiding group in advance on each downlink member carrier.When the terminal down-going synchronous is on a certain downlink member carrier, then from the pairing random access guiding group of this downlink member carrier, select an available random access guiding to use.

In some downlink member carrier groups, the random access guiding of down-going synchronous in the terminal of different downlink member carriers is used different random access lead group; The base station is judged on which downlink member carrier of terminal down-going synchronous in the downlink member carrier group according to the random access guiding group at the employed random access guiding of terminal place.The base station sends accidental access response on the corresponding downstream member carrier; Terminal is receiving random access response on the corresponding downstream member carrier.In a certain downlink member carrier group, the corresponding relation of downlink member carrier and random access guiding group is notified by the base station.

Down-going synchronous is used different random access guidings in the terminal of different members carrier wave, the terminal down-going synchronous just can be judged in according to the employed random access guiding of terminal in the base station which downlink member carrier like this, and the base station sends accidental access response on this downlink member carrier.

Method two, notice terminal in base station sends a downlink member carrier of accidental access response, and the base station sends accidental access response on this downlink member carrier, terminal receiving random access response to the corresponding downstream member carrier;

The downlink member carrier of its transmission accidental access response of signaling terminal of broadcasting can be passed through in the base station.For example, one has four downlink member carriers, then in signaling, indicates the downlink member carrier that sends accidental access response by 2 bits.

Method three, base station and terminal fixing downlink member carrier of agreement in advance are used to carry accidental access response; The base station sends accidental access response on this downlink member carrier, terminal is receiving random access response on this fixing downlink member carrier;

When a plurality of terminals sent random access guiding on a uplink member carrier, the base station adopted said method can determine on which downlink member carrier for which terminal sends accidental access response, to notify the Timing Advance of this terminal.If there is the Timing Advance of a plurality of terminals to send on a downlink member carrier, then Timing Advance can be carried for a plurality of terminals in the base station in an accidental access response.

Accordingly, the method for terminal receiving random access response comprises: the terminal informing base station sends accidental access response on some downlink member carriers; Described terminal is receiving random access response on that downlink member carrier of informing base station.

Preferably, terminal is by employed random access guiding and the employed uplink member carrier informing base station of transmission random access guiding.

Preferably, that downlink member carrier of described terminal informing base station is the downlink member carrier at described terminal down-going synchronous place.

Preferably, a plurality of downlink member carriers are one group, every group of corresponding uplink member carrier of downlink member carrier, and the corresponding one group of random access guiding of each downlink member carrier (terminal can be known or know by the random access guiding group of notifying in the downlink member carrier by the mode of agreement); The step of terminal informing base station further comprises: the terminal down-going synchronous is behind a certain downlink member carrier, described terminal sends random access guiding on the uplink member carrier of the downlink member carrier group correspondence under this downlink member carrier, and the random access guiding in the random access guiding group of this downlink member carrier correspondence of selection use.

Preferably, described terminal by with the making an appointment or know one group of random access guiding that each downlink member carrier is corresponding in each downlink member carrier of base station by the random access guiding group that the base station is notified; Described terminal is when sending random access guiding, determine one group of random access guiding according to the downlink member carrier of its down-going synchronous, and therefrom select a random access guiding to use, the downlink member carrier that is used for the described terminal down-going synchronous of informing base station is so that described base station sends accidental access response on this downlink member carrier.

The method of another kind of terminal receiving random access response comprises: it determines to send accidental access response on which downlink member carrier by the signaling terminal in the base station; Terminal receives the signaling that described base station sends, receiving random access response on the downlink member carrier of base station indication.

Preferably, a plurality of downlink member carriers are one group, every group of corresponding uplink member carrier of downlink member carrier, the terminal down-going synchronous is behind a certain downlink member carrier, and described terminal sends random access guiding on the uplink member carrier of the downlink member carrier group correspondence under this downlink member carrier; Described base station is provided with a downlink member carrier that is used to send accidental access response in each downlink member carrier group, send the employed uplink member carrier of random access guiding according to terminal and determine a descending member carrier group, and definite downlink member carrier that sends accidental access response, send the signaling of indicating this downlink member carrier to terminal, described terminal is receiving random access response on the downlink member carrier of described base station indication.

The method of another kind of terminal receiving random access response comprises: base station and terminal agreement send a downlink member carrier of accidental access response, and described terminal is receiving random access response on the downlink member carrier of agreement.

Preferably, a plurality of downlink member carriers are one group, and a certain downlink member carrier that the corresponding uplink member carrier of every group of downlink member carrier, described base station and terminal are made an appointment in the downlink member carrier group is used to send accidental access response; The terminal down-going synchronous is behind a certain downlink member carrier, and described terminal sends random access guiding on the uplink member carrier of the downlink member carrier group correspondence under this downlink member carrier; And with this downlink member carrier group of base station agreement in be used to send receiving random access response on the downlink member carrier of accidental access response.

A kind of base station that sends accidental access response for example comprises receiving element, control unit and transmitting element, wherein:

Receiving element is used for the notice of receiving terminal;

Preferably, described receiving element is further used for the random access guiding that receiving terminal sends on a certain uplink synchronous carrier wave; Described control unit is further used for according to the employed random access guiding of terminal and/or sends the downlink member carrier that the employed uplink member carrier of random access guiding determines to send accidental access response.

Preferably, described base station also comprises memory cell, is used to store the downlink member carrier that every group of downlink member carrier comprises, and the pairing uplink member carrier of each downlink member carrier group; Described control unit is further used for sending the employed uplink member carrier of random access guiding according to terminal, perhaps according to employed random access guiding of terminal and the employed uplink member carrier of transmission random access guiding, according to the corresponding relation of the uplink member carrier and the downlink member carrier group of described cell stores, determine to send a downlink member carrier of accidental access response again.

Described control unit sends the employed uplink member carrier of random access guiding according to terminal and determines to send a downlink member carrier of accidental access response and indicate described transmitting element transmission to be meant:

Described control unit is provided with a downlink member carrier that is used to send accidental access response in each downlink member carrier group, and notifies which downlink member carrier in the described terminal downlink member carrier group to be used to send accidental access response by signaling (for example broadcasting in SIB2); Described control unit sends the uplink member carrier at random access guiding place according to described terminal and the uplink member carrier of described cell stores is determined the downlink member carrier group that described uplink member carrier is corresponding with the corresponding relation of downlink member carrier group, determines to send the downlink member carrier of accidental access response thus; And indicate described transmitting element to send described signaling, and on this downlink member carrier, send accidental access response;

Described control unit is according to the employed random access guiding of terminal and the employed uplink member carrier of transmission random access guiding determines to send a downlink member carrier of accidental access response and indicate described transmitting element transmission to be meant:

Make an appointment one group of random access guiding of each the downlink member carrier correspondence in the described downlink member carrier group of described base station and terminal; Described control unit is further used for determining the downlink member carrier group that described uplink member carrier is corresponding according to the uplink member carrier at described terminal transmission random access guiding place and the uplink member carrier of described cell stores with the corresponding relation of downlink member carrier group, determine the downlink member carrier of terminal notice according to the random access guiding that terminal is used, and indicate described transmitting element on this downlink member carrier, to send accidental access response;

Preferably, described memory cell is used to store the corresponding relation of each downlink member carrier and one group of random access guiding; Described control unit also is used for according to the downlink member carrier of employed random access guiding of terminal and preservation and the corresponding relation of random access guiding, determine the downlink member carrier of described terminal notice, indicate described transmitting element on described downlink member carrier, to send accidental access response.

The another kind of base station that sends accidental access response for example comprises receiving element, control unit and transmitting element, wherein:

The another kind of base station that sends accidental access response for example comprises memory cell, receiving element, control unit and transmitting element, wherein:

Described memory cell is used to store a downlink member carrier that is used to send accidental access response of making an appointment with described base station and terminal;

Described control unit is used for behind the random access guiding that receives the terminal transmission, indicates described transmitting element to send accidental access response on the downlink member carrier of agreement;

A kind of terminal of receiving random access response for example comprises control unit and receiving element, wherein:

Preferably, described control unit is further by employed random access guiding and the employed uplink member carrier informing base station of transmission random access guiding.

Preferably, that downlink member carrier of described control informing base station is the downlink member carrier at described terminal down-going synchronous place.

Preferably, one group of downlink member carrier comprises one or several downlink member carriers, a uplink member carrier of each downlink member carrier group correspondence, the corresponding one group of random access guiding of each downlink member carrier, described terminal also comprises memory cell, is used to store the downlink member carrier that every group of downlink member carrier comprises; Described control unit also is used in the terminal down-going synchronous behind a certain downlink member carrier, be chosen on the uplink member carrier of the downlink member carrier group correspondence under this downlink member carrier and send random access guiding, and select to use a random access guiding in the random access guiding group of this downlink member carrier correspondence.

Perhaps, when described control unit sends random access guiding at the indication transmitting element, determine one group of random access guiding according to the downlink member carrier of its down-going synchronous and the corresponding relation of downlink member carrier and random access guiding group, and therefrom select a random access guiding to use, the downlink member carrier that is used for the described terminal down-going synchronous of informing base station is so that described base station sends accidental access response on this downlink member carrier.

The terminal of another kind of receiving random access response for example comprises control unit and receiving element, wherein:

Preferably, one group of downlink member carrier comprises one or several downlink member carriers, a uplink member carrier of each downlink member carrier group correspondence, and described terminal also comprises a memory cell and a transmitting element:

Described memory cell is used to store the downlink member carrier that every group of downlink member carrier comprises;

Described control unit is further used in the terminal down-going synchronous indicating described transmitting element to send random access guiding on the uplink member carrier of the downlink member carrier group correspondence under this downlink member carrier behind a certain downlink member carrier; And, determine that from described downlink member carrier group the base station sends a downlink member carrier of accidental access response according to the signaling that described base station issues;

Described transmitting element is used for sending random access guiding on the uplink member carrier of the indication of described control unit.

Preferably, described control unit one of in the following manner knows that downlink member carrier group and which uplink member carrier have corresponding relation:

The frequency of the same uplink member carrier that the base station is notified on each downlink member carrier of downlink member carrier group;

The frequency of the same uplink member carrier that the base station is notified on each downlink member carrier of downlink member carrier group, and all notified the configuration parameter of the Physical Random Access Channel on this uplink member carrier on these downlink member carriers;

Each downlink member carrier of downlink member carrier group is by the frequency of the same uplink member carrier of acquiescence sending and receiving frequency interval sensing;

Each downlink member carrier of downlink member carrier group passes through the frequency of the same uplink member carrier of acquiescence sending and receiving frequency interval sensing, and has all notified the configuration parameter of the Physical Random Access Channel on this uplink member carrier on these downlink member carriers;

The downlink member carrier group that described terminal is preserved in advance and the corresponding relation of uplink member carrier.

The terminal of another kind of receiving random access response for example comprises memory cell, control unit and receiving element, wherein:

Described control unit is used to indicate described receiving element receiving random access response on the downlink member carrier of agreement;

Preferably, one group of downlink member carrier comprises one or several downlink member carriers, a uplink member carrier of each downlink member carrier group correspondence, and described terminal also comprises transmitting element:

Described memory cell also is used to store the downlink member carrier that every group of downlink member carrier comprises, and with each downlink member carrier group of base station agreement in be used for the downlink member carrier of receiving random access response;

Described control unit also is used in the terminal down-going synchronous indicating described transmitting element to send random access guiding on the uplink member carrier of the downlink member carrier group correspondence under this downlink member carrier behind a certain downlink member carrier; And indicate described receiving element with this downlink member carrier group of described base station agreement in a descending member carrier on receiving random access response;

Above described base station is according to the definite downlink member carrier that sends accidental access response of the employed random access guiding of terminal, and the base station can be judged according to the sequence number of random access guiding.

Embodiment one

The descending member carrier that 4 20MHz are arranged, i.e. D1, D2, D3, D4; The up member carrier that 2 20MHz are arranged, i.e. U1, U2.

Downlink member carrier is divided into two groups, i.e. N=2.As shown in Figure 4, among the figure, The expression downlink synchronous signal,

The expression broadcast channel.First group comprises { D1, D2}, corresponding U1; Second group comprises { D3, D4}, corresponding U2.Be that down-going synchronous sends random access guiding in the terminal of D1 or D2 on up-link carrier U1; Down-going synchronous sends random access guiding in the terminal of D3 or D4 on up-link carrier U2.

The base station signaling terminal of broadcasting: terminal receiving random access response on D1 of down-going synchronous downlink member carrier in first group; Terminal receiving random access response on D3 of down-going synchronous downlink member carrier in second group; For example, in first group, the accidental access response of the terminal of broadcast channel notice down-going synchronous on this downlink member carrier on the D1 is gone up at current downlink member carrier (being D1) and is sent; Broadcast channel notice down-going synchronous on the D2 goes up at accidental access response another downlink member carrier (being D1) in current group of the terminal on this downlink member carrier and sends; In second group, the accidental access response of the terminal of broadcast channel notice down-going synchronous on this downlink member carrier on the D3 is gone up at current downlink member carrier (being D3) and is sent; Broadcast channel notice down-going synchronous on the D4 goes up at accidental access response another downlink member carrier (being D3) in current group of the terminal on this downlink member carrier and sends.The moment that the base station is sent the signaling of this broadcasting does not limit.When having only two downlink member carriers in each downlink member carrier group, only need 1 bit (0 or 1), the base station can be informed the downlink member carrier that sends accidental access response to terminal.

The base station sends leading employed uplink member carrier according to terminal can judge the terminal down-going synchronous on for which group downlink member carrier.Then the base station the downlink member carrier of this group in downlink member carrier (for first group be D1, be D3 for second group) go up and send accidental access response.Terminal receives on the corresponding downstream member carrier.For example, in the terminal of D2, send random access guiding for a down-going synchronous on U1, accidental access response is sent out at D1 in the base station.

In addition, above-mentioned signaling can be in the second type systematic information (SIB-2) broadcast transmission.Because the cycle of SIB2 is shorter, therefore, use by SIB2 and send indication, can make terminal can know the downlink member carrier of receiving random access response soon.

Embodiment two

Downlink member carrier is divided into two groups, i.e. N=2.As shown in Figure 5, among the figure, The expression downlink synchronous signal,

In first group, accidental access response is fixed on D1 and goes up transmission, and in second group, accidental access response is fixed on D3 and goes up transmission

The base station sends leading employed uplink member carrier according to terminal can judge the terminal down-going synchronous on for which group downlink member carrier.Then the base station the fixing downlink member carrier of this group in downlink member carrier (for first group be D1, be D3 for second group) go up and send accidental access response.Terminal receives on the corresponding downstream member carrier.For example, in the terminal of D2, send random access guiding for a down-going synchronous on U1, accidental access response is sent out at D1 in the base station.

Embodiment three

Downlink member carrier is divided into two groups, i.e. N=2.As shown in Figure 6, among the figure,

The expression downlink synchronous signal,

The expression broadcast channel, represents that sequence number is the random access guiding of even number,

The expression sequence number is the random access guiding of odd number.First group comprises { D1, D2}, corresponding U1; Second group comprises { D3, D4}, corresponding U2.Be that down-going synchronous sends random access guiding in the terminal of D1 or D2 on up-link carrier U1; Down-going synchronous sends random access guiding in the terminal of D3 or D4 on up-link carrier U2.

In first group, down-going synchronous is used the random access guiding of sequence number as even number in the terminal of D1, and down-going synchronous is used the random access guiding of sequence number as odd number in the terminal of D2; In second group, down-going synchronous is used the random access guiding of sequence number as even number in the terminal of D3, and down-going synchronous is used the random access guiding of sequence number as odd number in the terminal of D4; This corresponding relation can be by the base station by signaling or be fixed up.

The base station sends leading employed uplink member carrier according to terminal can judge the terminal down-going synchronous on for which group downlink member carrier.The base station promptly judges according to the random access guiding group (being that the odd indexed group still is an even number sequence number group) under the random access guiding of terminal use the terminal down-going synchronous is on which downlink member carrier according to the random access guiding of terminal use then.The base station sends the accidental access response of this terminal on the corresponding downstream member carrier, terminal receives random access guiding on this downlink member carrier.For example, in the terminal of D2, send random access guiding for a down-going synchronous on U1, use the random access guiding of sequence as odd number, then accidental access response is sent out at D2 in the base station.

After adopting the present invention, the base station only on a downlink member carrier for certain terminal transmission accidental access response, needn't on all downlink member carriers, all send accidental access response, saved system resource greatly.

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1, the sending method of accidental access response in a kind of wireless communication system is characterized in that,

The base station is according to the definite downlink member carrier that sends accidental access response of the notice of terminal, and the base station only sends accidental access response on this downlink member carrier.

2, the method for claim 1 is characterized in that,

Terminal is by employed random access guiding and/or send the employed uplink member carrier informing base station of random access guiding.

3, method as claimed in claim 2 is characterized in that,

The own down-going synchronous of described terminal informing base station is on which downlink member carrier, and the base station only sends accidental access response on this downlink member carrier.

4, method as claimed in claim 2 is characterized in that, described method further comprises:

A plurality of downlink member carriers are one group, every group of corresponding uplink member carrier of downlink member carrier, the terminal down-going synchronous is behind a certain downlink member carrier, and described terminal sends random access guiding on the uplink member carrier of the downlink member carrier group correspondence under this downlink member carrier;

Described base station sends the employed uplink member carrier of random access guiding according to terminal, perhaps according to employed random access guiding of terminal and the employed uplink member carrier of transmission random access guiding, determine to send a downlink member carrier of accidental access response, and on this downlink member carrier of determining, send accidental access response.

5, method as claimed in claim 4 is characterized in that,

Described base station sends the employed uplink member carrier of random access guiding according to terminal and determines that the step that sends a downlink member carrier of accidental access response and send accidental access response on this downlink member carrier comprises:

6, method as claimed in claim 5 is characterized in that,

Described signaling is broadcast transmission in the second type systematic block of information SIB2.

7, method as claimed in claim 4 is characterized in that,

Described base station determines that according to employed random access guiding of terminal and the employed uplink member carrier of transmission random access guiding the step that sends a downlink member carrier of accidental access response and send accidental access response on this downlink member carrier comprises:

Preserve the corresponding relation of each downlink member carrier and one group of random access guiding on the described base station;

Described base station is determined the downlink member carrier group that described uplink member carrier is corresponding according to uplink member carrier and uplink member carrier that described terminal sends the random access guiding place with the corresponding relation of downlink member carrier group, determine the terminal down-going synchronous on which downlink member carrier according to the random access guiding that terminal is used, described base station sends accidental access response on this downlink member carrier.

8, method as claimed in claim 2 is characterized in that, described method further comprises:

Described base station is according to the corresponding relation of the employed random access guiding of terminal and downlink member carrier and random access guiding, determine the downlink member carrier of described terminal down-going synchronous, described base station only sends accidental access response on the downlink member carrier of described terminal synchronizes.

9, as the described method of arbitrary claim among the claim 4-7, it is characterized in that,

10, the sending method of accidental access response in a kind of wireless communication system is characterized in that,

It sends a downlink member carrier of accidental access response base station notice terminal, and the base station sends accidental access response on this downlink member carrier.

11, method as claimed in claim 10 is characterized in that,

Described base station is the broadcast transmission signaling in the second type systematic block of information SIB2, is used to notify terminal receiving random access response to which downlink member carrier.

12, the sending method of accidental access response in a kind of wireless communication system is characterized in that,

Base station and the terminal a certain downlink member carrier of making an appointment is used to carry accidental access response; Described base station sends accidental access response on this downlink member carrier.

13, send the base station of accidental access response in a kind of wireless communication system, it is characterized in that, comprise receiving element, control unit and transmitting element, wherein:

Receiving element is used for the notice of receiving terminal;

14, base station as claimed in claim 13 is characterized in that,

Described receiving element is further used for the random access guiding that receiving terminal sends on a certain uplink synchronous carrier wave;

Described control unit is further used for according to the employed random access guiding of terminal and/or sends the downlink member carrier that the employed uplink member carrier of random access guiding determines to send accidental access response.

15, base station as claimed in claim 14 is characterized in that, described base station also comprises memory cell,

Described memory cell is used to store the downlink member carrier that every group of downlink member carrier comprises, and the pairing uplink member carrier of each downlink member carrier group;

Described control unit is further used for sending the employed uplink member carrier of random access guiding according to terminal, perhaps according to employed random access guiding of terminal and the employed uplink member carrier of transmission random access guiding, according to the corresponding relation of the uplink member carrier and the downlink member carrier group of described cell stores, determine to send a downlink member carrier of accidental access response again.

16, base station as claimed in claim 15 is characterized in that,

17, base station as claimed in claim 16 is characterized in that,

18, base station as claimed in claim 15 is characterized in that,

19, base station as claimed in claim 14 is characterized in that, described base station also comprises memory cell,

Described memory cell is used to store the corresponding relation of each downlink member carrier and one group of random access guiding;

Described control unit is further used for according to the downlink member carrier of employed random access guiding of terminal and preservation and the corresponding relation of random access guiding, determine the downlink member carrier of described terminal notice, indicate described transmitting element on described downlink member carrier, to send accidental access response.

20, send the base station of accidental access response in a kind of wireless communication system, it is characterized in that, comprise receiving element, control unit and transmitting element, wherein:

21, base station as claimed in claim 20 is characterized in that,

Described transmitting element sends signaling in the second type systematic block of information SIB2.

22, send the base station of accidental access response in a kind of wireless communication system, it is characterized in that, comprise memory cell, receiving element, control unit and transmitting element, wherein:

23, the method for receiving random access response in a kind of wireless communication system is characterized in that,

The terminal informing base station sends accidental access response on some downlink member carriers;

Described terminal is receiving random access response on that downlink member carrier of informing base station.

24, method as claimed in claim 23 is characterized in that,

Terminal is by employed random access guiding and send the employed uplink member carrier informing base station of random access guiding.

25, method as claimed in claim 24 is characterized in that,

That downlink member carrier of described terminal informing base station is the downlink member carrier at described terminal down-going synchronous place.

26, method as claimed in claim 24 is characterized in that,

A plurality of downlink member carriers are one group, every group of corresponding uplink member carrier of downlink member carrier; And corresponding one group of random access guiding of each downlink member carrier;

The step of described terminal informing base station further comprises: the terminal down-going synchronous is behind a certain downlink member carrier, described terminal sends random access guiding on the uplink member carrier of the downlink member carrier group correspondence under this downlink member carrier, and the random access guiding in the random access guiding group of this downlink member carrier correspondence of selection use.

27, method as claimed in claim 23 is characterized in that,

Described terminal by with the making an appointment or know one group of random access guiding that each downlink member carrier is corresponding in each downlink member carrier of base station by the random access guiding group that the base station is notified; Described terminal is when sending random access guiding, determine one group of random access guiding according to the downlink member carrier of its down-going synchronous, and therefrom select a random access guiding to use, the downlink member carrier that is used for the described terminal down-going synchronous of informing base station is so that described base station sends accidental access response on this downlink member carrier.

28, method as claimed in claim 26 is characterized in that,

29, the method for receiving random access response in a kind of wireless communication system is characterized in that,

It determines to send accidental access response on which downlink member carrier by the signaling terminal in the base station; Terminal receives the signaling that described base station sends, receiving random access response on the downlink member carrier of base station indication.

30, method as claimed in claim 29 is characterized in that, described method further comprises:

Described base station is provided with a downlink member carrier that is used to send accidental access response in each downlink member carrier group, send the employed uplink member carrier of random access guiding according to terminal and determine a descending member carrier group, and definite downlink member carrier that sends accidental access response, send the signaling of indicating this downlink member carrier to terminal, described terminal is receiving random access response on the downlink member carrier of described base station indication.

31, method as claimed in claim 30 is characterized in that,

32, the method for receiving random access response in a kind of wireless communication system is characterized in that,

Base station and terminal agreement send a downlink member carrier of accidental access response, and described terminal is receiving random access response on the downlink member carrier of agreement.

33, method as claimed in claim 32 is characterized in that, described method further comprises:

A plurality of downlink member carriers are one group, and a certain downlink member carrier that the corresponding uplink member carrier of every group of downlink member carrier, described base station and terminal are made an appointment in the downlink member carrier group is used to send accidental access response;

The terminal down-going synchronous is behind a certain downlink member carrier, and described terminal sends random access guiding on the uplink member carrier of the downlink member carrier group correspondence under this downlink member carrier; And with this downlink member carrier group of base station agreement in be used to send receiving random access response on the downlink member carrier of accidental access response.

34, method as claimed in claim 33 is characterized in that,

35, the terminal of receiving random access response in a kind of wireless communication system is characterized in that, comprises control unit and receiving element, wherein:

36, terminal as claimed in claim 35 is characterized in that,

Described control unit is further by employed random access guiding and the employed uplink member carrier informing base station of transmission random access guiding.

37, terminal as claimed in claim 36 is characterized in that,

That downlink member carrier of described control informing base station is the downlink member carrier at described terminal down-going synchronous place.

38, terminal as claimed in claim 36, it is characterized in that, one group of downlink member carrier comprises one or several downlink member carriers, a uplink member carrier of each downlink member carrier group correspondence, the corresponding one group of random access guiding of each downlink member carrier, described terminal also comprises memory cell:

Described control unit is further used in the terminal down-going synchronous behind a certain downlink member carrier, be chosen on the uplink member carrier of the downlink member carrier group correspondence under this downlink member carrier and send random access guiding, and select to use a random access guiding in the random access guiding group of this downlink member carrier correspondence.

39, terminal as claimed in claim 36, it is characterized in that, one group of downlink member carrier comprises one or several downlink member carriers, a uplink member carrier of each downlink member carrier group correspondence, the corresponding one group of random access guiding of each downlink member carrier, described terminal also comprises memory cell:

Described control unit is further used for when sending random access guiding, determine a random access guiding group according to the downlink member carrier of its down-going synchronous and the corresponding relation of downlink member carrier and random access guiding group, and therefrom select a random access guiding to use, the downlink member carrier that is used for the described terminal down-going synchronous of informing base station is so that described base station sends accidental access response on this downlink member carrier.

40, as claim 38 or 39 described terminals, it is characterized in that,

Described control unit one of in the following manner knows that downlink member carrier group and which uplink member carrier have corresponding relation:

41, the terminal of receiving random access response in a kind of wireless communication system is characterized in that, comprises control unit and receiving element, wherein:

42, terminal as claimed in claim 41, it is characterized in that one group of downlink member carrier comprises one or several downlink member carriers, a uplink member carrier of each downlink member carrier group correspondence, described terminal also comprises a memory cell and a transmitting element

43, terminal as claimed in claim 42 is characterized in that,

44, the terminal of receiving random access response in a kind of wireless communication system is characterized in that, comprises memory cell, control unit and receiving element, wherein:

45, terminal as claimed in claim 44 is characterized in that, one group of downlink member carrier comprises one or several downlink member carriers, a uplink member carrier of each downlink member carrier group correspondence, and described terminal also comprises transmitting element:

Described memory cell is further used for storing the downlink member carrier that every group of downlink member carrier comprises, and with each downlink member carrier group of base station agreement in be used for the downlink member carrier of receiving random access response;

Described control unit is further used in the terminal down-going synchronous indicating described transmitting element to send random access guiding on the uplink member carrier of the downlink member carrier group correspondence under this downlink member carrier behind a certain downlink member carrier; And indicate described receiving element with this downlink member carrier group of described base station agreement in a descending member carrier on receiving random access response;

46, terminal as claimed in claim 45 is characterized in that,