CN101772182B - Random access method and equipment - Google Patents
Random access method and equipment Download PDFInfo
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- CN101772182B CN101772182B CN2009100764616A CN200910076461A CN101772182B CN 101772182 B CN101772182 B CN 101772182B CN 2009100764616 A CN2009100764616 A CN 2009100764616A CN 200910076461 A CN200910076461 A CN 200910076461A CN 101772182 B CN101772182 B CN 101772182B
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- 230000004044 response Effects 0.000 claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000000969 carrier Substances 0.000 description 14
- 230000002776 aggregation Effects 0.000 description 4
- 238000004220 aggregation Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 238000012163 sequencing technique Methods 0.000 description 2
- 230000008685 targeting Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The invention discloses a random access method and random access equipment. The random access method comprises the following steps that: uplink random access channels of uplink member carrier waves are grouped; one-to-one correspondence between downlink member carrier waves and uplink random access channel groups is established; a base station sends broadcast information to a terminal on each downlink member carrier wave, and according to the correspondence, loads a time-frequency resource collocation instruction of the uplink random access channel groups corresponding to the downlink member carrier waves on the broadcast information; the base station receives a random access leading sequence sent by the terminal from the uplink random access channel groups, and according to the correspondence, determines a downlink member carrier wave corresponding to the uplink random access channel groups sending the random access leading sequence; and the base station sends a random access response to the terminal on the determined downlink member carrier wave. The scheme of the invention saves downlink resources.
Description
Technical field
The present invention relates to access technology at random, relate in particular to the method and apparatus that inserts at random, this equipment comprises base station and terminal equipment.
Background technology
In Long Term Evolution-enhanced edition (LTE-A, Long term Evolution-advanced) system, there is the situation of carrier aggregation, so-called carrier aggregation just possibly comprise a plurality of continuous or discrete member carriers in a big bandwidth.For example, for the system bandwidth of descending 100MHz, possibly comprise the discrete frequency bands of 5 20MHz; The bandwidth that also possibly comprise discrete multiple frequency band, like the frequency band of a plurality of 10MHz, and the frequency band of a plurality of 5MHz or the like.
Under the situation of carrying out carrier aggregation, the downlink system bandwidth of base station side and the up-link bandwidth of UE side are also inconsistent, and general downlink system bandwidth is greater than the up-link bandwidth, and for example the up-link bandwidth is 20MHz, and the downlink system bandwidth is 80MHz.Wherein possibly there are a plurality of downlink member carriers in downlink system bandwidth for 80MHz, for example is 4 downlink member carriers, and the bandwidth of each downlink member carrier place frequency band is 20MHz; Wherein also possibly there are a plurality of uplink member carrier in up-link bandwidth for 20MHz, for example is 2 uplink member carrier, and the bandwidth of each uplink member carrier place frequency band is 10MHz; Like this, downlink member carrier can not be corresponding one by one with uplink member carrier, with the situation that the corresponding uplink member carrier of at least two downlink member carriers occurs.
To the situation of the corresponding uplink member carrier of at least two downlink member carriers, existing random access procedure is described below, this process may further comprise the steps:
For the situation that comprises the downlink member carrier of a plurality of different frequency bands in the big downlink system bandwidth,, need on each downlink member carrier, send downlink synchronous signal and broadcast message for the speed that guarantees that UE just searches in the sub-district.Because can on a plurality of frequencies, search for synchronizing signal during the UE start, if synchronizing signal is excessive at interval, can cause UE just to search overlong time, therefore also very power consumption simultaneously, all can issue synchronizing signal and broadcast message on each downlink member carrier.
UE selects a downlink member carrier, on this downlink member carrier, reads downlink synchronous signal, carry out synchronously after, read broadcast message.
UE has been known the corresponding relation between downlink member carrier and the uplink member carrier in advance; After the broadcast message of sending on certain downlink member carrier of UE reception; According to this corresponding relation; On the RACH of the uplink member carrier of correspondence, random access leader sequence is sent to the base station, and receiving broadcasting information downlink member carrier in monitor accidental access response.
After step 104, base station receive at random targeting sequencing, the random access leader sequence of UE is fed back, on all downlink member carriers, send accidental access response to UE.
The base station is after receiving random access leader sequence on the RACH of uplink member carrier; Should on the downlink member carrier that sends broadcast message, send accidental access response to the terminal; But because downlink member carrier quantity is greater than uplink member carrier quantity; The situation of the corresponding uplink member carrier of a plurality of downlink member carriers occurred, the broadcast message that UE from which downlink member carrier receives is not also known in the base station, does not just know on which downlink member carrier, send accidental access response yet and gives UE; In order to guarantee that UE can receive accidental access response, accidental access response is all sent in the base station on all downlink member carriers.
Behind the UE receiving random access response, initiate the scheduling of resource request, carry out follow-up operation to the base station.
By above visible; For uplink member carrier and downlink member carrier is not situation one to one; In the existing random access scheme, after the base station receives at random targeting sequencing, need on all downlink member carriers, send accidental access response to UE; This has taken too much downlink resource, has caused the waste to downlink resource.
Summary of the invention
The present invention provides a kind of method that inserts at random, and this method can reduce taking downlink resource.
The present invention provides a kind of base station, and taking of downlink resource can be reduced in this base station.
The present invention provides a kind of terminal equipment, and this terminal equipment can reduce taking downlink resource.
A kind of method that inserts at random, this method is divided into groups to the uplink random access channel of uplink member carrier, sets up the one-to-one relationship between downlink member carrier and the uplink random access channel group, and this method comprises:
Broadcast message is sent to the terminal in the base station on each downlink member carrier, according to said corresponding relation, in broadcast message, carry the running time-frequency resource configuration indication of the uplink random access channel group corresponding with downlink member carrier;
The random access leader sequence that send from uplink random access channel group of received terminal the base station according to said corresponding relation, is confirmed and the corresponding downlink member carrier of uplink random access channel group that sends random access leader sequence;
The base station is sent accidental access response and is given the terminal on the downlink member carrier of confirming.
A kind of base station, this base station comprise that relation is set up module, broadcast message issues module and response issues module;
Said relation is set up module, is used for the uplink random access channel of uplink member carrier is divided into groups, and sets up the one-to-one relationship between downlink member carrier and the uplink random access channel group;
Said broadcast message issues module; Be used on each downlink member carrier, sending broadcast message to the terminal; Set up the corresponding relation that module is set up based on relation, in broadcast message, carry the running time-frequency resource configuration indication of the uplink random access channel group corresponding with downlink member carrier;
Said response issues module; Be used for from the random access leader sequence of uplink random access channel group of received terminal transmission; Set up the corresponding relation that module is set up based on relation, confirm and the corresponding downlink member carrier of uplink random access channel group that sends random access leader sequence; Response issues module and on the downlink member carrier of confirming, sends accidental access response to the terminal.
A kind of terminal equipment, this terminal equipment comprise broadcast message read module and random access leader sequence sending module;
Said broadcast message read module; Be used on the downlink member carrier of selecting, reading broadcast message; In broadcast message, obtain the running time-frequency resource configuration indication of uplink random access channel group, send running time-frequency resource configuration indication to the random access leader sequence sending module;
Said random access leader sequence sending module is used to receive the running time-frequency resource indication, is indicating on the corresponding uplink random access channel group to base station transmission random access leader sequence with the running time-frequency resource configuration.
Can find out from such scheme, among the present invention, the uplink random access channel of uplink member carrier divided into groups, set up the one-to-one relationship between downlink member carrier and the uplink random access channel group; The running time-frequency resource configuration indication of uplink random access channel group is carried in the base station in the broadcast message that issues; Then; The base station is from uplink random access channel group of received random access leader sequence; And according to this corresponding relation, confirm and the corresponding downlink member carrier of uplink random access channel group that sends random access leader sequence, through this downlink member carrier of confirming accidental access response is sent to the terminal.Like this; Divide into groups to identify each downlink member carrier through RACH to uplink member carrier; The clear and definite downlink member carrier that sends accidental access response has been avoided obscuring of downlink member carrier, need not as prior art, on all downlink member carriers, send accidental access response; Thereby, saved downlink resource.
Description of drawings
Fig. 1 is the method flow diagram that inserts at random in the prior art;
The method indicative flowchart of Fig. 2 for inserting at random among the present invention;
Fig. 3 is the collocation method instance of RACH in the random access procedure of the present invention;
The method flow diagram instance that Fig. 4 inserts for the present invention at random;
The system configuration sketch map that Fig. 5 inserts for the present invention at random.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, below in conjunction with embodiment and accompanying drawing, to further explain of the present invention.
For there being carrier aggregation; And the situation of at least two downlink member carriers of a uplink member carrier correspondence, the present invention divides into groups to the uplink random access channel of uplink member carrier in advance, sets up the one-to-one relationship between downlink member carrier and the uplink random access channel group; Make the corresponding downlink member carrier of each RACH group; Utilize different RACH groups to distinguish downlink member carrier, thereby, obscuring of downlink member carrier avoided.Referring to Fig. 2, be the method indicative flowchart that the present invention inserts at random, this method may further comprise the steps:
Step 201, base station are sent broadcast message to the terminal on each downlink member carrier, according to corresponding relation, in broadcast message, carry the running time-frequency resource configuration indication of the uplink random access channel group corresponding with downlink member carrier.
Here; Suppose corresponding N the downlink member carrier of a uplink member carrier, be expressed as the 0th to N-1 downlink member carrier, when setting up corresponding relation; The RACH of uplink member carrier is divided into the N group, is expressed as the 0th group to N-1 group RACH.When issuing broadcast message, broadcast message is sent to the terminal in the base station on the 0th downlink member carrier, in broadcast message, carries the running time-frequency resource configuration indication of the 0th group of RACH; On the 1st downlink member carrier, send broadcast message, in broadcast message, carry the running time-frequency resource configuration indication of the 1st group of RACH to the terminal; The rest may be inferred, on N-1 downlink member carrier, sends broadcast message to the terminal at last, in broadcast message, carries the running time-frequency resource configuration indication of N-1 group RACH.
The terminal is selected one in N downlink member carrier; On this downlink member carrier of selecting; Read broadcast message, from broadcast message, extract running time-frequency resource configuration indication, the running time-frequency resource configuration identifier corresponding RACH group; Then, on the uplink random access channel group corresponding, send random access leader sequence to the base station with this running time-frequency resource configuration indication.After sending random access leader sequence, accidental access response is monitored in the terminal on the downlink member carrier of receiving broadcasting information.
UE reads before the broadcast message, receives earlier the synchronizing signal that send the base station, accomplish and the base station between synchronously.
Step 202; The random access leader sequence that send from uplink random access channel group of received terminal the base station; According to the corresponding relation between uplink random access channel group and the downlink member carrier, confirm and the corresponding downlink member carrier of uplink random access channel group that sends random access leader sequence.
Send accidental access response on the downlink member carrier that step 203, base station are confirmed and give the terminal in step 202.
Through an instance the present invention program is specified below.In this instance, the downlink system bandwidth is 100MHz, comprises the discrete downlink member carrier of 5 20MHz, and the up-link bandwidth is 40MHz, comprises the uplink member carrier of 2 20MHz.Wherein, No. 1, No. 1, downlink member carrier and No. 2 corresponding uplink member carrier; No. 2, downlink member carrier No. 3, No. 4 and No. 5 corresponding uplink member carrier; The RACH that No. 1, uplink member carrier is expressed as RACH A, and the RACH that No. 2, uplink member carrier is expressed as RACH B.When setting up corresponding relation, RACH A is divided into RACH group A1 and RACH group A2, No. 1, the corresponding downlink member carrier of RACH group A1, No. 2, the corresponding downlink member carrier of RACH group A2; RACH B is divided into RACH group B1, RACH group B2 and RACH group B3; No. 3, the corresponding downlink member carrier of RACH group B1; No. 4, the corresponding downlink member carrier of RACH group B2, No. 5, the corresponding downlink member carrier of RACH group B3.Fig. 3 shows the situation of allocating random access channel group in this instance.
Here; Suppose totally 4 of the RACHs of No. 1, uplink member carrier; The RACH that No. 2, uplink member carrier has 6, when setting up corresponding relation, based on different application scenes such as RACH demand etc.; Confirming the density of RACH group, just is the number of each RACH set of dispense RACH based on different application scenes.Here, suppose that the density of broadcasting RACH in each downlink member carrier is 2PRACH/10ms, just, for each RACH group is all distributed two RACHs; Certainly; According to actual conditions; Also can be for the many downlink member carriers of demand distribute more RACH, the downlink member carrier few for demand distributes less relatively RACH, for example; For RACH group A1 distributes 3 RACHs, for RACH group A2 distributes 1 RACH.
Referring to Fig. 4, be the method flow diagram instance that the present invention inserts at random, this method may further comprise the steps:
Step 401, base station are sent broadcast message to the terminal on each downlink member carrier, according to corresponding relation, in broadcast message, carry the running time-frequency resource configuration indication of the uplink random access channel group corresponding with downlink member carrier.
In this step; Carry the running time-frequency resource configuration indication of RACH group A1 in the broadcast message that send the base station on No. 1, downlink member carrier; Carry the running time-frequency resource configuration indication of RACH group A2 in the broadcast message of on No. 2, downlink member carrier, sending; Carry the running time-frequency resource configuration indication of RACH group B1 in the broadcast message of on No. 3, downlink member carrier, sending; Carry the running time-frequency resource configuration indication of RACH group B2 in the broadcast message of on No. 4, downlink member carrier, sending, the running time-frequency resource configuration indication of carrying RACH group B3 in the broadcast message of on No. 5, downlink member carrier, sending.
The terminal is selected one at random in 5 downlink member carriers; Receive the broadcast message that this downlink member carrier sends; From broadcast message, obtain running time-frequency resource configuration indication, hypothesis has been selected downlink member carrier No. 4 in the present embodiment, and the running time-frequency resource that then carries in broadcast message configuration is designated as the running time-frequency resource configuration indication of RACH group B2; Correspondingly, random access leader sequence is sent to the base station in the terminal on RACH group B2.After sending random access leader sequence, accidental access response is monitored in the terminal on No. 4, the downlink member carrier of receiving broadcasting information.
Step 402, the random access leader sequence that send from uplink random access channel group B2 receiving terminal the base station according to corresponding relation, is confirmed corresponding with uplink random access channel group B2 and downlink member carrier No. 4.
Step 403, the base station is sent accidental access response and is given the terminal on No. 4, the downlink member carrier of confirming.
The scheduling of resource request is initiated after in No. 4, downlink member carrier, listening to accidental access response in the terminal, carries out follow-up operation.
Referring to Fig. 5, be the system configuration sketch map that the present invention inserts at random, this system comprises terminal and base station.
This base station comprises that relation is set up module, broadcast message issues module and response issues module;
Said relation is set up module, is used for the uplink random access channel of uplink member carrier is divided into groups, and sets up the one-to-one relationship between downlink member carrier and the uplink random access channel group;
Said broadcast message issues module; Be used on each downlink member carrier, sending broadcast message to the terminal; Set up the corresponding relation that module is set up based on relation, in broadcast message, carry the running time-frequency resource configuration indication of the uplink random access channel group corresponding with downlink member carrier;
Said response issues module; Be used for from the random access leader sequence of uplink random access channel group of received terminal transmission; Set up the corresponding relation that module is set up based on relation, confirm and the corresponding downlink member carrier of uplink random access channel group that sends random access leader sequence; Response issues module and on the downlink member carrier of confirming, sends accidental access response to the terminal.
This terminal equipment comprises broadcast message read module and random access leader sequence sending module;
Said broadcast message read module; Be used on the downlink member carrier of selecting, reading broadcast message; In broadcast message, obtain the running time-frequency resource configuration indication of uplink random access channel group, send running time-frequency resource configuration indication to the random access leader sequence sending module;
Said random access leader sequence sending module is used to receive the running time-frequency resource indication, is indicating on the corresponding uplink random access channel group to base station transmission random access leader sequence with the running time-frequency resource configuration.
Alternatively; Said random access leader sequence sending module comprises RACH chooser module; Be used for indicating corresponding uplink random access channel group with said running time-frequency resource configuration; Select a RACH, on this RACH of selecting, send random access leader sequence to the base station.
The present invention is directed to the situation of two corresponding uplink member carrier of above downlink member carrier; Divide into groups to identify each downlink member carrier through RACH to uplink member carrier; With this downlink member carrier that clearly sends accidental access response, avoided obscuring of downlink member carrier, need not as prior art, on all downlink member carriers, all send accidental access response; Thereby, saved downlink resource.And the present invention program is to the not influence of present standard, can be compatible the LTE-A system, realize easy.
Above-described specific embodiment; The object of the invention, technical scheme and beneficial effect have been carried out further explain, and institute it should be understood that the above is merely specific embodiment of the present invention; And be not used in qualification protection scope of the present invention; All within spirit of the present invention and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a method that inserts at random is characterized in that, the uplink random access channel of uplink member carrier is divided into groups, and sets up the one-to-one relationship between downlink member carrier and the uplink random access channel group, and this method comprises:
Broadcast message is sent to the terminal in the base station on each downlink member carrier, according to said corresponding relation, in broadcast message, carry the running time-frequency resource configuration indication of the uplink random access channel group corresponding with downlink member carrier;
The random access leader sequence that send from uplink random access channel group of received terminal the base station according to said corresponding relation, is confirmed and the corresponding downlink member carrier of uplink random access channel group that sends random access leader sequence;
The base station is sent accidental access response and is given the terminal on the downlink member carrier of confirming.
2. the method for claim 1 is characterized in that, this method comprises:
When setting up said corresponding relation, confirm the density of RACH group according to the RACH demand.
3. the method for claim 1 is characterized in that, said base station on each downlink member carrier after broadcast message is sent at the terminal, this method comprises:
The terminal with broadcast message in send random access leader sequence to the base station on the corresponding uplink random access channel group of running time-frequency resource configuration indication of carrying.
4. method as claimed in claim 3 is characterized in that, said with broadcast message in send random access leader sequence to the base station on the corresponding uplink random access channel group of running time-frequency resource configuration indication of carrying and comprise:
Indicating in the corresponding uplink random access channel group with said running time-frequency resource configuration, select a RACH, on this RACH of selecting, send random access leader sequence to the base station.
5. a base station is characterized in that, this base station comprises that relation is set up module, broadcast message issues module and response issues module;
Said relation is set up module, is used for the uplink random access channel of uplink member carrier is divided into groups, and sets up the one-to-one relationship between downlink member carrier and the uplink random access channel group;
Said broadcast message issues module; Be used on each downlink member carrier, sending broadcast message to the terminal; Set up the corresponding relation that module is set up based on relation, in broadcast message, carry the running time-frequency resource configuration indication of the uplink random access channel group corresponding with downlink member carrier;
Said response issues module; Be used for from the random access leader sequence of uplink random access channel group of received terminal transmission; Set up the corresponding relation that module is set up based on relation, confirm and the corresponding downlink member carrier of uplink random access channel group that sends random access leader sequence; Response issues module and on the downlink member carrier of confirming, sends accidental access response to the terminal.
6. a terminal equipment is characterized in that, the uplink random access channel of uplink member carrier is divided into groups, and sets up the one-to-one relationship between downlink member carrier and the uplink random access channel group; Broadcast message is sent to terminal equipment in the base station on each downlink member carrier, according to said corresponding relation, in broadcast message, carry the running time-frequency resource configuration indication of the uplink random access channel group corresponding with downlink member carrier; The random access leader sequence that send from uplink random access channel group of received terminal equipment the base station; According to said corresponding relation; Confirm and the corresponding downlink member carrier of uplink random access channel group that sends random access leader sequence, on the downlink member carrier of confirming, send accidental access response and give terminal equipment;
This terminal equipment comprises broadcast message read module and random access leader sequence sending module;
Said broadcast message read module; Be used on the downlink member carrier of selecting, reading broadcast message; In broadcast message, obtain the running time-frequency resource configuration indication of uplink random access channel group, send running time-frequency resource configuration indication to the random access leader sequence sending module;
Said random access leader sequence sending module is used to receive the running time-frequency resource indication, is indicating on the corresponding uplink random access channel group to base station transmission random access leader sequence with the running time-frequency resource configuration.
7. terminal equipment as claimed in claim 6; It is characterized in that; Said random access leader sequence sending module comprises RACH chooser module; Be used for selecting a RACH, on this RACH of selecting, send random access leader sequence to the base station indicating corresponding uplink random access channel group with said running time-frequency resource configuration.
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| CN2009100764616A CN101772182B (en) | 2009-01-05 | 2009-01-05 | Random access method and equipment |
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| CN2009100764616A CN101772182B (en) | 2009-01-05 | 2009-01-05 | Random access method and equipment |
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| CN101772182A CN101772182A (en) | 2010-07-07 |
| CN101772182B true CN101772182B (en) | 2012-11-14 |
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Cited By (1)
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| EP3598664A4 (en) * | 2017-04-01 | 2020-03-25 | Cloudminds (Shenzhen) Robotics Systems Co., Ltd. | Frequency selection method, random access method, and apparatus |
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| CN101772131B (en) * | 2009-01-05 | 2012-09-05 | 电信科学技术研究院 | Method, system and device for sending random access feedback information |
| CN101778482B (en) * | 2009-01-09 | 2012-08-15 | 华为技术有限公司 | Method and device for accessing primary network |
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| CN102300158B (en) | 2010-06-28 | 2015-03-11 | 中国移动通信集团公司 | Method and device for acquiring carrier information and carrier information indication in time division duplex system |
| CN103081553A (en) * | 2010-09-27 | 2013-05-01 | 富士通株式会社 | Method and user equipment for processing carrier state in carrier aggregation system |
| CN106851549B (en) * | 2011-02-28 | 2020-07-10 | 北京三星通信技术研究有限公司 | Random access method for M2M terminal |
| CN103703812B (en) * | 2011-08-05 | 2017-07-28 | 太阳专利信托公司 | Transmission device, preamble transmission device, and transmission method |
| CN103209459B (en) | 2012-01-11 | 2016-08-10 | 华为技术有限公司 | The transmission method of data and device |
| CN103959856A (en) * | 2012-10-22 | 2014-07-30 | 华为技术有限公司 | Method, device, and system for radio communication |
| CN103947251B (en) * | 2012-10-22 | 2018-03-09 | 华为技术有限公司 | Wireless communications method, apparatus and system |
| CN105264999B (en) | 2013-09-16 | 2020-01-31 | 华为技术有限公司 | Method for predetermining resources in random access, user equipment and base station |
| CN105284174A (en) * | 2013-10-28 | 2016-01-27 | 华为技术有限公司 | Random access method, random access configuration method, device and system |
| CN105530685B (en) * | 2014-10-24 | 2020-01-07 | 中兴通讯股份有限公司 | Message sending and receiving method, sending and receiving device, base station and terminal |
| EP3661301B1 (en) | 2015-02-12 | 2023-06-21 | Huawei Technologies Co., Ltd. | Signal transmission apparatus, system, and method |
| CN107333222A (en) * | 2016-04-28 | 2017-11-07 | 中兴通讯股份有限公司 | The processing of schedule information, sending method, the processing system of device and schedule information |
| CN107425899B (en) * | 2016-05-24 | 2022-03-01 | 中兴通讯股份有限公司 | Base station, terminal, and method and device for determining port |
| CN107645322B (en) * | 2016-07-21 | 2021-09-24 | 上海诺基亚贝尔股份有限公司 | Random access method and equipment based on beamforming |
| CN108282301A (en) * | 2017-01-06 | 2018-07-13 | 电信科学技术研究院 | A kind of data transmission method, apparatus and system |
| CN110213834B (en) * | 2017-01-06 | 2020-09-29 | 华为技术有限公司 | Random access method, user equipment and network equipment |
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| JP7024867B2 (en) * | 2017-11-17 | 2022-02-24 | 富士通株式会社 | Random access methods, devices and communication systems |
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