CN100450308C - Method and system for random access resource allocation in wireless network - Google Patents
Method and system for random access resource allocation in wireless network Download PDFInfo
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention relates to a method for distributing wireless network random access resource and relative system, wherein said method that distributes frequency resource comprises that: using broadcast channel to broadcast signal, with available frequency information; mobile terminal receives signal to obtain the available frequency information; mobile terminal selects one frequency to randomly access. And the method that distributes time resource comprises that: using broadcast channel to broadcast signal, with available time slit information; mobile terminal receives signal to obtain the available time slit information; mobile terminal selects one time slit to randomly access. The invention can average random access interference.
Description
Technical field
The present invention relates to the resource allocation of wireless network, relate in particular to the distribution method and the system of the time resource that the distribution method of the frequency resource that a kind of wireless network inserts at random and system and a kind of wireless network insert at random.
Background technology
Since 3GPP (3rd Generation Partnership Project) issue UMTS (Universal Mobile Telecommunications System, universal mobile telecommunications system) since first commercial version Realse99 of network, the 3GPP organizational member continues network is improved, in the hope of obtaining more network characteristic and better network performance.Wherein the R5 version of issue in 2003 has been introduced HSDPA (High Speed Downlink PacketAccess, down high speed grouping inserts) and the R6 version of issue in 2005 introduced HSUPA (High Speed Uplink Packet Access, the up-high speed grouping inserts) make the wireless access performance of WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA) inserts) obtain great lifting.
HSDPA has integrated a series of new wireless access technologys, mainly comprising HARQ (Hybrid Automatic Repeat Request, mix retransmission technique), AMC (Adaptive Modulation and Coding, adaptive modulation and coding) and Fast-Scheduling (the fast dispatch method of NodeB control).Make the descending throughput and the peak rate of whole system obtain very big lifting (bringing up to 14Mbps), thereby improved the spectrum efficiency of system from the 2Mbps of R99; The shortest TTI of HSDPA (Transmission Time Interval in addition, Transmission Time Interval) 10ms from R99 is reduced to 2ms, the improvement of coupling system framework and realization can effectively reduce being connected and propagation delay time of wireless access network, improves user's impression of wireless traffic.HSUPA is by having improved the up throughput and the peak rate (bringing up near 6Mbps from the 2Mbps of R99) of system equally in the up HARQ of utilization and Fast-Scheduling technology, and simultaneously the shortest TTI is reduced to 2ms from the 10ms of R99, for the time delay that reduces Radio Access Network provides the foundation.
For UMTS RAN (Radio Access Network, Radio Access Network) evolution, most of equipment producer with the evolution stage be divided into evolution in mid-term (Medium TermEvolution, MTE) and Long Term Evolution (Long Term Evolution, LTE) two stages, as shown in Figure 1.The main purpose of evolution in mid-term is that existing network is not done to optimize as much as possible under the too cataclysmal prerequisite, and Long Term Evolution then is conceived to the innovation that existing network carries out some essence is improved the systematic function of Radio Access Network.
Along with R5, R6 version HSDPA, HSUPA, and the introducing of MBMS characteristics such as (MultimediaBroadcast and Multicast Service, broadcast multi-broadcastings) and perfect, the UMTS network has been finished the evolution stage in mid-term.Network performance that HSDPA and HSUPA brought promotes the business demand that can satisfy substantially before 2010, and compares with other cellular networks and to possess enough competitiveness.The agreement formulation along with HSUPA and MBMS will enter coda in the end of the year 2004, and the Long Term Evolution problem of UMTS network is also brought into schedule.3GPPRAN working group convenes numerous operators and equipment vendor to hold a special meeting in Canada in November, 2004 demand and the technology path of relevant UMTS Long Term Evolution is discussed, and sets up problem such as standardization project.
At present about in the middle of the ardent discussion of the standard operation of LTE system, the down physical layer access technology of preliminary definite LTE system is OFDMA (Orthogonal FrequencyDivision Multiple Access, the OFDM multiple access), the upstream physical layer access technology is SC-FDMA (Single Carrier-Frequency Division MultipleAccess, the multiplexing multiple access of single carrier frequency division).Compare with WCDMA, do not had RNC (Radio Network Controller, radio network controller) node, but the function of RNC has been broken down into aGW (E-UTRAN Access Gateway, IAD) and E-NodeB (E-UTRAN NodeB, the base station of evolution) node.
Random access procedure is used for the initial access of UE (User Equipment, subscriber equipment), and purpose is to realize uplink synchronous and to the E-NodeB request up link resource of eating dishes without rice or wine.In a sub-district, the frequency band that the frequency band that is used for inserting at random and being used to is launched data is a quadrature, as shown in Figure 2, inserts also not decision of the present LTE of band resource at random but how to distribute between different districts.The maximum bandwidth that UE supports is that minimum is 10MHz, is 20MHz to the maximum by the ability decision of UE.Distributing to the minimum bandwidth that inserts at random is 1.25MHz or 375KHz, at present also not decision.Whether (minizone) does not yet determine synchronously between the base station.
In the WCDMA system, it all is identical inserting used frequency resource at random, so there is not the assignment problem of frequency resource.
Summary of the invention
Main purpose of the present invention is to provide the distribution method and the system of the resource that a kind of wireless network inserts at random, is used to realize to inserting the distribution of band resource and/or time resource at random, is evenly distributed as far as possible in the minizone to insert at random and disturbs.
To achieve these goals, according to a first aspect of the invention, the invention provides the distribution method of the frequency resource that a kind of wireless network inserts at random.Distribution method comprises: broadcast step, broadcast broadcast singal by broadcast channel, broadcast singal comprises available band information, and available band information is the information of the expression frequency band that can be used for inserting at random; Receiving step, the portable terminal receiving broadcast signal obtains available band information; And the access step, portable terminal selects a frequency band to initiate to insert at random from the frequency band that can be used for inserting at random.
Broadcasting step can comprise: total bandwidth is divided into some equal portions; And with a or many parts of frequency bands that can be used for inserting at random that are set to portable terminal in some equal portions.Broadcasting step further can comprise: with each equal portions numbering, the one or more numberings corresponding to set frequency band in the numbering are set to available band information.Receiving step can comprise: portable terminal is learnt the frequency band that can be used for inserting at random from the numbering that is set to available band information.
Above-mentioned total bandwidth can be sub-district total bandwidth or base station total bandwidth, and each equal portions can be each minimum bandwidth that inserts at random.
Be the different frequency band that can be used for inserting at random of different cell allocation, make the frequency band that can be used for inserting at random that distributes between neighbor cell not have overlapping.
If be synchronous between minizone or base station, then broadcast singal can also comprise the information of the access slot on the frequency band that can be used for inserting at random.Insert step and further comprise, portable terminal selects to select a frequency band and the access slot from selected frequency band an access slot to initiate to insert at random from the frequency band that can be used for inserting at random.Be the different access slot of different cell allocation, make that the access slot that distributes between neighbor cell is different as far as possible.
To achieve these goals, according to a second aspect of the invention, the invention provides the distribution system of the frequency resource that a kind of wireless network inserts at random.Distribution system comprises: distribution device, be used to broadcast broadcast singal, and broadcast singal comprises available band information, available band information is the information of the expression frequency band that can be used for inserting at random; And portable terminal, be used for receiving broadcast signal, obtain available band information, from the frequency band that can be used for inserting at random, select a frequency band to initiate to insert at random.
In the distribution device side, sub-district total bandwidth or base station total bandwidth can be divided into some equal portions, each equal portions is each minimum bandwidth that inserts at random, and with a or many parts of frequency bands that can be used for inserting at random that are set to portable terminal in some equal portions.
In the distribution device side, also can be with each equal portions numbering, the one or more numberings corresponding to set frequency band in the numbering are set to available band information.Portable terminal can be learnt the frequency band that can be used for inserting at random from the numbering that is set to available band information.
Be the different frequency band that can be used for inserting at random of different cell allocation, make the frequency band that can be used for inserting at random that distributes between neighbor cell not have overlapping.
If be synchronous between minizone or base station, then broadcast singal can also comprise the information of the access slot on the frequency band that can be used for inserting at random.Portable terminal selects to select a frequency band and the access slot from selected frequency band an access slot to initiate to insert at random from the frequency band that can be used for inserting at random.Be the different access slot of different cell allocation, make that the access slot that distributes between neighbor cell is different as far as possible.
To achieve these goals, according to a third aspect of the invention we, the invention provides the distribution method of the time resource that a kind of wireless network inserts at random.Distribution method comprises: broadcast step, broadcast broadcast singal by broadcast channel, broadcast singal comprises available time slot information, and available time slot information is the information of the expression time slot that can be used for inserting at random; Receiving step, the portable terminal receiving broadcast signal obtains available time slot information; And the access step, portable terminal selects a time slot to initiate to insert at random from the time slot that can be used for inserting at random.
Be the different access slot of different cell allocation, make and insert the minimum interference that neighbor cell is inserted at random at random.
To achieve these goals, according to a forth aspect of the invention, the invention provides the distribution system of the time resource that a kind of wireless network inserts at random.Distribution system comprises: distribution device, be used to broadcast broadcast singal, and broadcast singal comprises available time slot information, available time slot information is the information of the expression time slot that can be used for inserting at random; And portable terminal, be used for receiving broadcast signal, obtain available time slot information, from the time slot that can be used for inserting at random, select a time slot to initiate to insert at random.
Be the different access slot of different cell allocation, make and insert the minimum interference that neighbor cell is inserted at random at random.
Pass through technique scheme, the present invention broadcasts the information of the frequency band that can be used for inserting at random to portable terminal by broadcast channel, this available band is select the some equal portions frequency bands that equal to insert at random minimum bandwidth that on average are divided into from the total bandwidth by the portable terminal support a or many parts, and the frequency band that is used for inserting at random that distributes between neighbor cell does not disturb as far as possible mutually, the present invention also broadcasts the information of the time slot that can be used for inserting at random under certain condition to portable terminal by broadcast channel, and the time slot that is used for inserting at random that distributes between neighbor cell does not disturb as far as possible mutually, make in Long Term Evolution stage wireless access network, to insert at random to disturb to be evenly distributed as far as possible in the minizone, thus the access probability of elevator system, capacity, and throughput.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the evolution planning chart of UMTS network;
Fig. 2 is that the frequency band that is used for inserting at random in a sub-district and being used to is launched the graph of a relation between the frequency band of data;
Fig. 3 is the flow chart according to the distribution method of the frequency resource that is used for inserting at random of the present invention;
Fig. 4 is the block diagram according to the distribution system of the frequency resource that is used for inserting at random of the present invention;
Fig. 5 is the flow chart according to the distribution method of the time resource that is used for inserting at random of the present invention;
Fig. 6 is the block diagram according to the distribution system of the time resource that is used for inserting at random of the present invention;
Fig. 7 is the subcarrier division figure that is used for inserting at random according to the embodiment of the invention; And
Fig. 8 is the bandwidth assignment figure that the different districts UE according to the embodiment of the invention can be used for inserting at random.
Embodiment
Describe the present invention below with reference to the accompanying drawings in detail.
The present invention is based on wireless access technology, proposed initial access and resource request stage, be used between different districts, distributing the method and system that inserts band resource at random at portable terminal.
As shown in Figure 3, the distribution method of the frequency resource that inserts at random provided by the present invention may further comprise the steps:
S102 broadcasts broadcast singal by broadcast channel, and broadcast singal comprises available band information, and available band information is the information of the expression frequency band that can be used for inserting at random;
S104, the portable terminal receiving broadcast signal obtains available band information; And
S106, portable terminal select a frequency band to initiate to insert at random from the frequency band that can be used for inserting at random.
As shown in Figure 4, the distribution system 10 of the frequency resource that inserts at random provided by the present invention comprises: distribution device 20, be used to broadcast broadcast singal, and broadcast singal comprises available band information, available band information is the information of the expression frequency band that can be used for inserting at random; And portable terminal 30, be used for receiving broadcast signal, obtain available band information, from the frequency band that can be used for inserting at random, select a frequency band to initiate to insert at random.
As shown in Figure 5, the distribution method of the time resource that inserts at random provided by the present invention may further comprise the steps:
S302 broadcasts broadcast singal by broadcast channel, and broadcast singal comprises available time slot information, and available time slot information is the information of the expression time slot that can be used for inserting at random;
S304, the portable terminal receiving broadcast signal obtains available time slot information; And
S306, portable terminal select a time slot to initiate to insert at random from the time slot that can be used for inserting at random.
As shown in Figure 6, the distribution system 40 of the time resource that inserts at random provided by the present invention comprises: distribution device 50, be used to broadcast broadcast singal, and broadcast singal comprises available time slot information, available time slot information is the information of the expression time slot that can be used for inserting at random; And portable terminal 60, be used for receiving broadcast signal, obtain available time slot information, from the time slot that can be used for inserting at random, select a time slot to initiate to insert at random.
The invention provides the distribution method that inserts used frequency/time resource between a kind of different districts at random, make to insert at random to disturb to be evenly distributed as far as possible, with access probability, capacity and the throughput of elevator system in the minizone.
(1) (Broadcast Channel BCH) tells the frequency band that UE can be used for inserting at random in its pairing sub-district by broadcast channel.
The division that wherein inserts frequency band at random is that example is illustrated with Fig. 7.Fig. 7 is the sub-district of a 20MHz bandwidth, and inserting the dedicated bandwidth 1.25MHz of institute at random with each is example, is divided into 16 equal portions, is numbered 0 respectively ..., 15.BCH tells UE numbering, can be in 0 to 15, also can be a set (as several), specifically can determine according to application scenarios.
If the minizone be synchronous (for example, base station synchronization, perhaps base station asynchronous but sub-district under the same base station is synchronous), then BCH also needs to broadcast the access slot on the pairing frequency band of different districts.Access slot is meant the time slot that inserts on the frequency band inserting, and other time slot can send as data.Insert signal as 1,11,21 emissions, other transmitted data signal, then 1,11,21 is exactly access slot.
Access slot between different districts is different as far as possible or be evenly distributed, suppose that sub-district 1, sub-district 2, sub-district 3 all are provided with identical frequency band as inserting frequency band at random, if sub-district 1 usefulness time slot 1,11,21... are as access slot, then sub-district 2 can use time slot 2,12,22... as access slot, and sub-district 3 can use time slot 3,13,23... as access slot.
(2) frequency band that is used for inserting at random that distributes between neighbor cell will not disturb as far as possible mutually.
As shown in Figure 8, UE1 belongs to the user of sub-district 1, and UE2 belongs to the user of sub-district 2, and the like.
(3) UE detects the broadcast singal of BCH, concentrates initiation of selection to insert at random from the frequency band or the frequency band of its appointment.
If the minizone is synchronous, also need to select the access slot on the pairing frequency band of UE.
By the above embodiment of the present invention, at the initial access phase of portable terminal, realized distribution to random access resource, be evenly distributed as much as possible in the minizone to insert at random and disturb.
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 (17)
1. the distribution method of the frequency resource that inserts at random of a wireless network is characterized in that, may further comprise the steps:
Broadcast step, broadcast broadcast singal by broadcast channel, described broadcast singal comprises available band information, and described available band information is the information of the expression frequency band that can be used for inserting at random;
Receiving step, portable terminal receive described broadcast singal, obtain described available band information; And
Insert step, described portable terminal selects a frequency band to initiate to insert at random from the described frequency band that can be used for inserting at random.
2. distribution method according to claim 1 is characterized in that, the described step of broadcasting further may further comprise the steps:
Partiting step is divided into some equal portions with total bandwidth; And
Allocation step is with a or many parts of frequency bands that can be used for inserting at random that are set to described portable terminal in described some equal portions.
3. distribution method according to claim 2, it is characterized in that, the described step of broadcasting further comprises, with each equal portions numbering, described allocation step comprises that the one or more numberings corresponding to set frequency band are set to described available band information in the described numbering, described receiving step comprises that described portable terminal is learnt the described frequency band that can be used for inserting at random from the numbering that is set to described available band information.
4. distribution method according to claim 3 is characterized in that, described total bandwidth is the sub-district total bandwidth, and described each equal portions are each minimum bandwidth that inserts at random.
5. according to each described distribution method in the claim 1 to 3, it is characterized in that, be the different frequency band that can be used for inserting at random of different cell allocation, make the described frequency band that can be used for inserting at random that distributes between neighbor cell not have overlapping.
6. distribution method according to claim 1, it is characterized in that, when the minizone is synchronous, described broadcast singal also comprises the information of the access slot on the described frequency band that can be used for inserting at random, described access step comprises that further described portable terminal selects to select a frequency band and the access slot from selected frequency band an access slot to initiate to insert at random from the described frequency band that can be used for inserting at random.
7. distribution method according to claim 6 is characterized in that, is the different access slot of different cell allocation, makes to insert the minimum interference that neighbor cell is inserted at random at random.
8. the distribution system of the frequency resource that inserts at random of a wireless network is characterized in that, comprising:
Distribution device is used to broadcast broadcast singal, and described broadcast singal comprises available band information, and described available band information is the information of the expression frequency band that can be used for inserting at random; And
Portable terminal is used to receive described broadcast singal, obtains described available band information, selects a frequency band to initiate to insert at random from the described frequency band that can be used for inserting at random.
9. distribution system according to claim 8, it is characterized in that, in described distribution device side, the sub-district total bandwidth is divided into some equal portions, each equal portions is each minimum bandwidth that inserts at random, with a or many parts of frequency bands that can be used for inserting at random that are set to described portable terminal in described some equal portions.
10. want 9 described distribution systems according to right, it is characterized in that, in described distribution device side, with each equal portions numbering, one or more numberings corresponding to set frequency band in the described numbering are set to described available band information, and described portable terminal is learnt the described frequency band that can be used for inserting at random from the numbering that is set to described available band information.
11. each described distribution system in 10 is characterized in that according to Claim 8, is the different frequency band that can be used for inserting at random of different cell allocation, makes the described frequency band that can be used for inserting at random that distributes between neighbor cell not have overlapping.
12. distribution system according to claim 8, it is characterized in that, when the minizone is synchronous, described broadcast singal also comprises the information of the access slot on the described frequency band that can be used for inserting at random, and described portable terminal selects to select a frequency band and the access slot from selected frequency band an access slot to initiate to insert at random from the described frequency band that can be used for inserting at random.
13. distribution system according to claim 12 is characterized in that, is the different access slot of different cell allocation, makes to insert the minimum interference that neighbor cell is inserted at random at random.
14. the distribution method of the time resource that a wireless network inserts at random is characterized in that, may further comprise the steps:
Broadcast step, broadcast broadcast singal by broadcast channel, described broadcast singal comprises available time slot information, and described available time slot information is the information of the expression time slot that can be used for inserting at random;
Receiving step, portable terminal receive described broadcast singal, obtain described available time slot information; And
Insert step, described portable terminal selects a time slot to initiate to insert at random from the described time slot that can be used for inserting at random.
15. distribution method according to claim 14 is characterized in that, is the different access slot of different cell allocation, makes to insert the minimum interference that neighbor cell is inserted at random at random.
16. the distribution system of the time resource that a wireless network inserts at random is characterized in that, comprising:
Distribution device is used to broadcast broadcast singal, and described broadcast singal comprises available time slot information, and described available time slot information is the information of the expression time slot that can be used for inserting at random; And
Portable terminal is used to receive described broadcast singal, obtains described available time slot information, selects a time slot to initiate to insert at random from the described time slot that can be used for inserting at random.
17. distribution system according to claim 16 is characterized in that, is the different access slot of different cell allocation, makes to insert the minimum interference that neighbor cell is inserted at random at random.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100780579A CN100450308C (en) | 2006-04-29 | 2006-04-29 | Method and system for random access resource allocation in wireless network |
| PCT/CN2007/001466 WO2007128236A1 (en) | 2006-04-29 | 2007-04-29 | Method and system for distributing random access resource of wireless network |
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| CNB2006100780579A CN100450308C (en) | 2006-04-29 | 2006-04-29 | Method and system for random access resource allocation in wireless network |
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| CN100450308C true CN100450308C (en) | 2009-01-07 |
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| CN101128062B (en) * | 2007-09-24 | 2012-05-23 | 中兴通讯股份有限公司 | Method for terminal random access to cellular wireless communication system and group identifier generation method |
| CA2693140C (en) * | 2007-09-24 | 2014-07-15 | Zte Corporation | Terminal random access method for cellular radio communications system and method for generating group identifier |
| CN101400129B (en) * | 2007-09-28 | 2011-07-13 | 中兴通讯股份有限公司 | Random access resource distributing method |
| CN101472345B (en) * | 2007-12-29 | 2010-11-24 | 大唐移动通信设备有限公司 | Method and apparatus for determining and configuring scheduling identification, and random access method and apparatus |
| CN101483917A (en) * | 2008-01-10 | 2009-07-15 | 华为技术有限公司 | Frequency band access switching method, terminal and base station |
| CN101505541B (en) * | 2008-02-04 | 2010-11-10 | 上海贝尔阿尔卡特股份有限公司 | Method, base station and user equipment for transmitting random access time control information |
| BRPI0916871B1 (en) * | 2008-08-04 | 2020-11-24 | Sun Patent Trust | user equipment, reception method, integrated circuit, base station apparatus and transmission method |
| CN101815344A (en) * | 2009-02-20 | 2010-08-25 | 大唐移动通信设备有限公司 | Multi-carrier wave system access method and equipment |
| CN101925157B (en) * | 2009-06-16 | 2015-02-11 | 电信科学技术研究院 | Method, system and device for transmitting linkage information of non-resident carrier wave |
| CN102065371B (en) * | 2009-11-18 | 2015-04-01 | 中兴通讯股份有限公司 | Method and device for processing system messages of component carriers to be acquired |
| CN102665283A (en) * | 2012-04-13 | 2012-09-12 | 中国科学院上海微***与信息技术研究所 | Distributed wireless channel allocation and device suitable for smart grids |
| CN112218382A (en) * | 2019-07-12 | 2021-01-12 | 普天信息技术有限公司 | Random access method, network side equipment and mobile terminal |
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| CN1956356A (en) * | 2005-10-27 | 2007-05-02 | 中兴通讯股份有限公司 | Frequency range distribution and access method capable of flexible using spectrum resource and its system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2007128236A1 (en) | 2007-11-15 |
| CN1968511A (en) | 2007-05-23 |
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