CN100372387C - Distribution method of up code division resource - Google Patents
Distribution method of up code division resource Download PDFInfo
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- CN100372387C CN100372387C CNB031092519A CN03109251A CN100372387C CN 100372387 C CN100372387 C CN 100372387C CN B031092519 A CNB031092519 A CN B031092519A CN 03109251 A CN03109251 A CN 03109251A CN 100372387 C CN100372387 C CN 100372387C
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Abstract
The present invention discloses an allocation method of up code division resources, which is applied to TDD systems for high-speed data transmission. After a user terminal establishes a connection with a base station, the base station allocates a code channel for basic rate transmission to the user terminal. The method also comprises the steps that each user terminal reports respective required up rate information to the base station through physical layer signaling; the base station allocates usable code channels for all user terminals reporting information according to a scheduling principle after receiving the up rate information reported by all user terminals, and informs the user terminals through the physical layer signaling; the user terminals carry out data transmission according to the code channels allocated by the base station after receiving the information of the base station. The present invention realizes the rapid allocation of up code channel resources by using the physical layer signaling to allocate up service resources, allocates different code channel resources according to up service change, and enhances the utilization rate of system resources.
Description
Technical field
The present invention relates to the distribution technique of resource in time division duplex (TDD) system, the distribution method of up sign indicating number branch resource in the TDD system that is meant especially in high speed data transfer.
Background technology
TD SDMA (TD-SCDMA) system is based on tdd mode, i.e. uplink and downlink are in a frequency range together, do not need paired frequency, so availability of frequency spectrum height, and the correlation of up-downgoing resource is big.
The physical channel of TD-SCDMA comprises four-layer structure: the ground floor System Frame Number second layer is a radio frames, and the 3rd layer is subframe, and the 4th layer is time slot/sign indicating number.Specifically; physical channel is made up of several radio frames; a radio frames is 10ms; each radio frames is divided into the subframe of continuous two 5ms again; as shown in Figure 1, each subframe comprises seven business time-slots and three special time slots again, and three special time slots of oblique line filling part are respectively descending pilot frequency time slot (DwPTS); uplink pilot time slot (UpPTS), and protection time slot (GP).In each subframe, uplink and downlink timeslot can adopt symmetry and asymmetric two kinds of methods of salary distribution, and according to different Resource Allocation Formula, ascending time slot and descending time slot can dynamic assignment, and the configuration structure of subframe or time slot/sign indicating number is possible different.And each ascending time slot can have a plurality of user terminal code division multiplexings, and its spreading factor comprises 1,2,4,8,16 totally five kinds, and system distinguishes the employed resource of different user terminals by time domain jointly with a sign indicating number territory.
The process that the TDD system carries out the ascending resource distribution comprises following several steps:
A. when user terminal has the speech requirement, need at first to file a request to the base station, the base station is specified operable code channel and time slot according to the operating position of present resource to user terminal then.
If b. user terminal has other business at this moment, when needing more ascending resource, user terminal can pass through high-level signaling, sends ascending resource to the base station and uses and ask.
C. the base station need participate in carrying out the physical channel reconfiguration course by high level after the ascending resource that receives the user terminal transmission uses request.
Referring to shown in Figure 2: the physical channel reconfiguration course is as follows:
The Radio Resource control (RRC) of step 201, Access Network (UTRAN) produces physical channel and reshuffles (PHYSICAL CHANNEL RECONFIGURATION) message, and this message is sent to the RRC of respective user terminal;
Step 202, after user terminal is received this message, according to the content of carrying in the message physical channel is reconfigured;
Step 203, after finishing configuration effort, user terminal will be reshuffled to physical channel of the RRC of network feedback and be finished (PHYSICAL CHANNEL RECONFIGURATIONCOMPLETE) message.
D. after the base station high level is finished the physical channel reconfiguration course, the resource information after transmission is reshuffled to user terminal.
E. user terminal carries out the business transmission according to the ascending resource of base station assignment again.
From top description as can be seen, in the TD-SCDMA system, the base station is very slow for the response of the ascending resource demand that user terminal proposed, this mainly is because after user terminal is filed a request, the base station at first will be reported to high level by physical layer, after high level is finished dealing with simultaneously, also need to notify physical layer with result.
Mobile radio system develops into present 3-G (Generation Three mobile communication system) from the analog communication system of frequency division multiple access (FDMA), and the business of support develops into the mixed business of present data and speech from simple voice service, until data service at a high speed.People are more and more higher to the requirement of communication system, have been not content with the computer access network by family, but wish to realize can both receiving in any place such as send Email, carry out data services such as network browsing.Therefore, the development of communication system also gradually by the system of simple service speech to the system development of supporting high-speed data.
As everyone knows, speech business has tangible different with the desired service quality of data service.For speech business, require than higher real-time, to guarantee that the caller can exchange smoothly; This business is relatively average in time, and user terminal is conversation always before on-hook, and the speed of speech business is relatively low, and also more fixing, up-downgoing speed is symmetrical.And when smudgy once in a while, user terminal can be tolerated, so also not too high to the requirement of the error rate in the communication process.
For data service, user terminal can be waited for the response of network a little doing such as surfing the web, download, sending out in these activities of mail, but can not accept higher bit error rate; The initiation of data service is paroxysmal, and behind each professional end of transmission, user terminal has the reading time of a random length; Whether but carry out in the process in business, user terminal wishes to obtain high as far as possible message transmission rate, reduces data transmission period, but constant in very big requirement to speed; And according to the statistical nature of data service, downlink business is greater than the uplink service several times.
In sum, existing TD-SCDMA system optimizes for speech business, so if utilize existing TD-SCDMA system that high-speed data service is served, then can not guarantee the lower error rate; And because the appearance and the protensive features of data service, data service needs often according to changes in flow rate dynamic assignment physical resource; If use high-level signaling that physical layer resources is reshuffled, can be relatively slow owing to the high-level signaling transmission, thus cause the idle of physical resource long period, and strengthen the network signal burden, reduce the valid data throughput; Must make downlink data transmission become system bottleneck for up-downgoing distributes the resource of symmetry, can not bring into play the efficient of wireless frequency spectrum to greatest extent.
Therefore, a kind of system of high speed data transfer has been proposed in another patent application, be implemented in and carry out high-speed data transmission in the TDD system, in this patent, provided a kind of physical layer frame structure, utilize upload control slot transmission ascending control information, utilize up link control (ULC) part in the descending control time slot can transmit the ascending resource assignment signalling.But there is not specifically to set forth the reconfiguration course of ascending resource in this system.
Summary of the invention
In view of this, purpose of the present invention just provides a kind of distribution method of up sign indicating number branch resource, makes it can feed back, respond user terminal uplink service changes in flow rate fast.
A kind of up sign indicating number divides the distribution method of resource, is applied to the TDD system of high speed data transfer, and it is after user terminal and base station connect, and the base station is used in the code channel that basic rate transmits to the user terminal branch, and this method also comprises:
A, each user terminal are reported current separately desired upstream rate information by physical layer signaling to the base station;
B, base station are distributed current spendable code channel number for the reporting information user terminal according to dispatching principle, and it are passed through the physical layer signaling informing user terminal after the upstream rate information that receives all user terminal reports;
After C, user terminal are received the notice of base station, utilize the code channel of described base station assigns to carry out transmitting uplink data.
The described code channel number that uses is no more than the code channel number that maximum spreading factor determined in all up available service number of time slot.
To be the base station decide according to current channel conditions of rate request, rank and each user terminal of current each user terminal and the uplink load situation of self described dispatching principle.
Described upstream rate information is to require rising, changing down grade based on the user terminal present rate, or keeps present rate, or the indication of uplink end, or the highest, minimum downstream rate.
What the spendable code channel number of user terminal described in the step B and this user terminal were using does not wait.
Comprise code channel in the physical layer signaling of base station informing user terminal, then identical code channel all is assigned to this user terminal in all uplink service time slots.
Described ascending resource request is to apply for all or the code channel resource in the part uplink service time slot to the base station, or application discharges the code channel resource in all or part of uplink service time slot.
This method further comprises: set in advance assignment period, user terminal each cycle to base station reporting uplink rate information.
Described upstream rate information repeats to send in an assignment period by physical layer signaling.
Physical layer signaling described in the steps A sends by the assigned timeslot in the physical layer subframe of supporting the ascending control information transmission; Physical layer signaling described in the step B sends by the assigned timeslot in the physical layer subframe of supporting the Downlink Control Information transmission.
Described current spendable code channel number is the certain customers' terminal distribution to reporting information.
The present invention carries out the assignment of ascending resource by using physical layer signaling, realizes distributing the uplink code channel resource in time, fast, and can change according to uplink service, distributes the resource of different numbers, thereby improves usage factor of system resource.
Description of drawings
Fig. 1 is a TD-SCDMA system physical layer subframe structure schematic diagram;
The schematic diagram that Fig. 2 reshuffles for physical channel in the prior art;
Fig. 3 is a high speed data transmission system physical layer subframe structure schematic diagram;
Fig. 4 realizes the schematic flow sheet of uplink resource allocating method for the present invention;
The physical resource schematic diagram that Fig. 5 uses for ascending resource allocative decision of the present invention.
Embodiment
Core content of the present invention is: in high speed data transmission system, each user terminal is by physical layer signaling reporting uplink rate information, and operable ascending resource will be distributed to user terminal according to conditions such as the system's current available resource situation and the fairness doctrines in the base station.Here be meant operable uplink code channel resource.
Need to prove that in high speed data transmission system, the base unit of physical layer architecture is a subframe, each subframe is to be made of some time slots.As shown in Figure 3, in this system time slot (TS) 1 is set to the uplink control section, time slot 2 and time slot 3 are set to the uplink service part; The uplink control information of transmitting in TS1 can comprise the downstream data rate control information and the ascending resource of the data rate instructions of downlink transfer and ask information for instructions; User terminal transmits uplink control information by TS1 to network side according to current data speed and ascending resource situation in data transmission procedure, network side carries out the self adaptation adjustment of uplink service resource according to this uplink control information and current data speed and ascending resource situation.Therefore, physical layer signaling of the present invention just can send by the time slot of appointment in the subframe in the high-speed data system.
Referring to shown in Figure 4, realize that method of the present invention comprises the steps:
Certainly, if this moment user terminal when finding that the business of its support has not needed current higher rate, user terminal can require reduce upstream rate by the physical layer signaling informing base station, promptly discharges one or a plurality of code word.
After step 403, base station receive the upstream rate request that user terminal sends,, distribute the uplink code channel resource for the user terminal of reporting information according to dispatching principle.Dispatching principle is meant the base station according to the current upstream rate of each user terminal, rank and code word constraints, takes into account the fairness of the up reception service of each user terminal simultaneously, and the loading condition of self is made the distribution decision of ascending resource.Specifically, after the base station received the upstream rate information and present rate of all user terminal to send up, at first the requirement according to the user distributed the upstream rate resource; When estimating that then each user terminal sends upstream data with corresponding speed, the tolerance limit that whether the total interference level in base station is surpassed the base station, if surpass tolerance limit, in order to guarantee fairness, reduce the upstream rate of the higher user terminal of recent upstream rate, and the reduction process can repeat, up to satisfying base station tolerance limit requirement, determine the upstream rate of each user terminal; According to the fixed upstream rate of each user terminal, distribute corresponding up code word at last, finish the distribution of ascending resource.Here, based on dispatching principle, the base station can be certain customers' terminal distribution uplink code channel resource of reporting information only.
Certainly, each user terminal is reallocated spendable code channel number, and the ascending resource that can use than itself is many, also may lack, and specifically what can be decided according to current system resource condition.And, comprise code channel in the physical layer signaling of base station informing user terminal, then identical code channel all is assigned to this user terminal in all uplink service time slots.
After step 405, user terminal are received the notice of base station, utilize the code channel of base station indication to carry out uplink traffic transmission.
The present invention will set in advance user terminal and send upstream rate reporting period, i.e. after the time period of M frame, and this request met with a response, the code channel resource that user terminal will take the indication of current system sent data.But in reporting period, no matter whether it needs to increase, reduces or keep speed, each user terminal all will be again to base station reporting uplink rate information in upstream rate, and at this moment, the uplink code channel resource will be redistributed in the base station.
Describe technical scheme of the present invention in detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 5, illustrated the physical layer subframe structure figure of TDD system among the figure, each time slot comprises a plurality of code channels among this figure, and each code channel is isolated by horizontal line, and these four time slots are all by each user terminal code division multiplexing.Wherein, a time slot is used for transmission user terminal ascending resource demand signalling (URI), a time slot is used to refer to the ascending resource assignment signalling (URD) that user terminal is issued in the base station, two time slots are used for transmitting uplink service information, if supposing spreading factor is 16, so operable up code source has 32.
Need to prove that M, L are natural number, both values can be identical, also can be different.It is 5 that M, L are set in the present embodiment, then specifically distributes the step of time slot and code channel as follows:
A. when user terminal and network connect, will receive that a code channel is used to transmit basic rate in certain ascending time slot of base station assigns.
B. user terminal sends the URI signaling by physical layer to the base station, reports current upstream rate information, and request obtains higher speed, and this URI signaling repeats to send in continuous five frames.
C. after the base station receives the ascending resource demand signalling of all user terminals transmissions, according to the actual conditions of each user terminal and the load of self, carry out the distribution of ascending resource, distribute the available code channel of two ascending time slots for this user terminal, such as, code channel 0 and code channel 1.
D. the base station repeats to send to this user terminal by the URD signaling of physical layer in five continuous frames.
E. after user terminal receives the ascending resource assignment signalling, use the code channel 0 and the code channel 1 transmission uplink business data of base station appointment, and the code channel that this user terminal uses comprises code channel 0 and code channel 1 corresponding in all uplink service time slots.
From above-mentioned example as can be seen, user terminal at most can Request System in code channel resource in all ascending resources all be its service.After user terminal carried out the ascending resource request, the base station can distribute a plurality of code sources to give user terminal, but mostly was the code channel summation that maximum spreading factor determined of all up available service time slots most.
In addition, when the system discovery resource allocation is relatively more chaotic, also can carry out the arrangement of physical channel by above-mentioned use physical resource method for reconfiguration.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (11)
1. a up sign indicating number divides the distribution method of resource, is applied to the TDD system of high speed data transfer, it is characterized in that after user terminal and base station connected, the base station was used in the code channel that basic rate transmits to the user terminal branch, and this method is further comprising the steps of:
A, each user terminal are reported current separately desired upstream rate information by physical layer signaling to the base station;
B, base station are distributed current spendable code channel number for the user terminal of reporting information according to dispatching principle, and it are passed through the physical layer signaling informing user terminal after the upstream rate information that receives all user terminal reports;
After C, user terminal are received the notice of base station, utilize the code channel of described base station assigns to carry out transmitting uplink data.
2. method according to claim 1 is characterized in that, the described code channel number that uses is no more than the code channel number that maximum spreading factor determined in all up available service number of time slot.
3. method according to claim 1 is characterized in that, to be the base station decide according to current channel conditions of rate request, rank and each user terminal of current each user terminal and the uplink load situation of self described dispatching principle.
4. method according to claim 1 is characterized in that, described upstream rate information is to require rising, changing down grade based on the user terminal present rate, or keeps present rate, or the indication of uplink end, or the highest, minimum downstream rate.
5. method according to claim 1 is characterized in that, what the spendable code channel number of user terminal described in the step B and this user terminal were using does not wait.
6. method according to claim 1 is characterized in that, comprises code channel information in the physical layer signaling of base station informing user terminal, and code channel identical in all uplink service time slots is all distributed to this user terminal.
7. method according to claim 1 it is characterized in that described ascending resource request is to apply for all or the code channel resource in the part uplink service time slot to the base station, or application discharges the code channel resource in all or part of uplink service time slot.
8. method according to claim 1 is characterized in that, physical layer signaling described in the steps A sends by the assigned timeslot in the physical layer subframe of supporting the ascending control information transmission; Physical layer signaling described in the step B sends by the assigned timeslot in the physical layer subframe of supporting the Downlink Control Information transmission.
9. method according to claim 1 is characterized in that, this method further comprises: set in advance assignment period, user terminal each cycle to base station reporting uplink rate information.
10. method according to claim 9 is characterized in that, described upstream rate information repeats to send in an assignment period by physical layer signaling.
11. method according to claim 1 is characterized in that, described current spendable code channel number is the certain customers' terminal distribution to reporting information.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031092519A CN100372387C (en) | 2003-04-07 | 2003-04-07 | Distribution method of up code division resource |
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| CNB031092519A CN100372387C (en) | 2003-04-07 | 2003-04-07 | Distribution method of up code division resource |
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| CN1536903A CN1536903A (en) | 2004-10-13 |
| CN100372387C true CN100372387C (en) | 2008-02-27 |
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| CNB031092519A Expired - Fee Related CN100372387C (en) | 2003-04-07 | 2003-04-07 | Distribution method of up code division resource |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007128197A1 (en) * | 2006-04-30 | 2007-11-15 | Huawei Technologies Co., Ltd. | Method for assigning group call channel, system and mobile station thereof |
| CN101483879B (en) * | 2008-01-08 | 2010-12-01 | 大唐移动通信设备有限公司 | Method, apparatus and system for obtaining quality evaluation result of code channel resource channel quality assessment result |
| CN101588635B (en) * | 2008-05-20 | 2012-01-25 | 电信科学技术研究院 | Control methods and control device for high-speed shared information channel |
| CN101848498B (en) * | 2009-03-25 | 2012-08-08 | 电信科学技术研究院 | Resource allocation method and base station of high speed downlink packet access |
| CN104426633B (en) * | 2013-09-10 | 2017-12-15 | 华为技术有限公司 | Transmission method, user equipment and the network side equipment of ascending control information |
| CN109413747B (en) * | 2018-11-15 | 2023-07-11 | 新华三技术有限公司成都分公司 | Transmission resource allocation method and device, and transmission resource request method and device |
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| EP0938193A1 (en) * | 1998-02-18 | 1999-08-25 | Sony International (Europe) GmbH | Header structure for TDD systems |
| WO2000022865A2 (en) * | 1998-10-12 | 2000-04-20 | Telefonaktiebolaget Lm Ericsson | Link and radio cell adaptation in tdma/tdd systems |
| CN1296364A (en) * | 1999-11-04 | 2001-05-23 | 株式会社Ntt杜可莫 | Method for time-gap selection and distribution, base station and mobile station |
| CN1385013A (en) * | 2000-06-20 | 2002-12-11 | 连宇通信有限公司 | TDD framing method for physical layer of wireless system |
| WO2002104060A1 (en) * | 2001-06-15 | 2002-12-27 | Motorola Inc | A method for providing a communication channel in time division duplexing (tdd) mode between a tdd mobile and a tdd base station |
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2003
- 2003-04-07 CN CNB031092519A patent/CN100372387C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0938193A1 (en) * | 1998-02-18 | 1999-08-25 | Sony International (Europe) GmbH | Header structure for TDD systems |
| WO2000022865A2 (en) * | 1998-10-12 | 2000-04-20 | Telefonaktiebolaget Lm Ericsson | Link and radio cell adaptation in tdma/tdd systems |
| CN1296364A (en) * | 1999-11-04 | 2001-05-23 | 株式会社Ntt杜可莫 | Method for time-gap selection and distribution, base station and mobile station |
| CN1385013A (en) * | 2000-06-20 | 2002-12-11 | 连宇通信有限公司 | TDD framing method for physical layer of wireless system |
| WO2002104060A1 (en) * | 2001-06-15 | 2002-12-27 | Motorola Inc | A method for providing a communication channel in time division duplexing (tdd) mode between a tdd mobile and a tdd base station |
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