CN1523796A - Method of active transmission from UE to small datagrams - Google Patents
Method of active transmission from UE to small datagrams Download PDFInfo
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- CN1523796A CN1523796A CNA03103702XA CN03103702A CN1523796A CN 1523796 A CN1523796 A CN 1523796A CN A03103702X A CNA03103702X A CN A03103702XA CN 03103702 A CN03103702 A CN 03103702A CN 1523796 A CN1523796 A CN 1523796A
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Abstract
An active transmission method for UE to small datagram includes: defining a data transmission rate MBR, UE sends the indication information of active inbound data, Node B monitors every upward dispatch information control channel to receive new information of promptly inbound data and accept the UE inbound information in the defined time. This invention reduces the transmission time delay of datagram, if the small datagram transmission rate is smaller than the system stimulated largest active one, it can carry out active data transmission. This invention uses bit information of the physical layer to indicate UE, not adding any extra high level or no hardware variance to Node B or UE signaling.
Description
Technical field
The present invention relates to the standardization of third generation mobile, the UE during particularly the special uplink channel of WCDMA strengthens is to the active transmission method of small data newspaper.
Background technology
(The 3 in third generation partner plan
RdGeneration Partnership Project is called for short 3GPP) standardization effort that carries out third generation mobile, in WCDMA (Wide-Band CodeDivision Multiple Access) Release 6 versions, studying special uplink channel and strengthening (Enhancement for Uplink Dedicated Channel is called for short EUDCH), the purpose of EUDCH is, by effective management and the planning of wireless network to uplink transmission resource, the up-link capacity of raising system, and make it to be suitable for transmission to sudden stronger data service.
EUDCH carries out improved a kind of technology on the basis of the last version of WCDMA (Release 99/4/5).The research well afoot of EUDCH is not decided fully.In the 3GPP meeting, the major programme of proposition has at present: the Node B that two threshold scheme of Nokia company and motorola inc propose dispatches the scheme of distribution according to the quality of the wireless channel of terminal.
In the scheme of Nokia, each terminal (UE) is in the initialization procedure of dedicated transmission channel, and UE and base station controller (RNC) are consulted, and both have set up a transmission format composite set (TFCS), and this TFCS has comprised multiple transmission rate.Node B has two threshold values to each UE, and one is the UE threshold value, and another is a Node B threshold value.In communication process, it is TFC that UE is free to select transmission rate, must not be but the TFC that selects is necessary greater than current UE threshold value, if the TFC that UE uses equals current UE threshold value, and UE thinks also have the ability of transmitting with higher rate (as: current transmit power is much smaller than specified maximum transmission power), can improve the UE threshold value to Node B request, whether Node B allows to increase according to current noise situation decision, if allow UE to increase, the UE threshold value can not surpass Node B threshold value.
Concrete process is as follows:
The up signaling of a physical layer is called speed application (Rate Request is called for short RR) and is specifically designed to the current UE threshold value of UE application change.When UE wished to improve current UE threshold value, just UE wished with higher rate sending data, and the value of RR is made as " Up ", when UE does not wish to change current UE threshold value, did not send RR.When UE plans to send with little data rate, directly use less TFC to get final product.
Having the downlink signaling of a physical layer to be called speed simultaneously replys (Rate Grant is called for short RG) and is specifically designed to the speed application of UE is replied.When the value of RG is " Up ", illustrate that Node B agrees that UE increases its UE threshold value.When UE proposition speed application (promptly sending RR=" Up "), NodeB does not reply (promptly not sending RG), illustrates that Node B disagrees with that UE increases the UE threshold value.When the value of RG is " Down ", illustrate that Node B requires this UE to reduce its UE threshold value.
Generally, on the Dedicated Physical Control Channel (DPCCH) of up-downgoing, a bit is arranged respectively, represent RR and RG respectively.The value of RR has up and DTX (not sending).The value of RG has Up, Down and DTX (not sending).
Below the detailed scheme of introducing Motorola.
In the scheme of Motorola, UE is before carrying out transfer of data, some information need be issued Node B to carry out the request of transfer of data, Node B is according to the information of receiving, calculate the quality of the wireless channel of UE, and, to whether allowing this UE to transmit, carry out transfer of data etc. with great power and unify scheduling and arrange according to the situation of the request of current noise situation and other UE.Concrete process is as follows:
The first step: UE sends the request of transfer of data in a frame length is 10 milliseconds uplink scheduling information control channel (USICCH).The information that sends comprises length of data queue and transmitting power.See Fig. 1.
Second step: Node B monitors the length of data queue of each UE report and the information of transmission power, and selects maximum two and transmit in the time period that with the next one with 10 persons of outstanding talent second is transmission cycle.Node B replys selected UE by descending scheduling specified control channel (DSACCH).Institute's information transmitted has: subframe mapping, maximum transmission power waits other schedule information.A transmission cycle is 10 milliseconds, has been divided into five 2 milliseconds subframe.By the subframe mapping, the UE of reception has known and can send data in those several subframes.The maximum transmission power of UE is the noise rank according to Node B, and the factors such as power that the transmitting power of UE and base station receive calculate.Fig. 2 is the structure chart that descending scheduling distributes control channel.
The 3rd step: the UE that receives the scheduling appointed information begins to transmit.UE before this in the transformat control channel (TFRI) transmitted some information that control data transmission needs, as modulating-coding indication, IR Version, information such as new data indication bit.After the TFRI frame, use EUDCH channel transmission data information.The length of TFRI frame and EUDCH frame all is 2 milliseconds.Fig. 3 is the structrual description of up TFRI control channel.
Say that simply this scheme is a kind of transfer of data of asking response type.The transmission of any secondary data all is that the permission of process Node B just takes place.All resources all are under the control of Node B, and UE does not have initiatively to send the freedom of data.
Can see that from the top description of transfer of data before any once new transmission of UE, all will send request, Node B provides the process of scheduling assignment response to the request response type.For transfer of data, its feature is that the data due in is at random, and the data volume that arrives also is at random.Some data that need transmit constantly may be lacked very much, and as the ACK/NACK information of TCP, what the upper strata needed is as soon as possible these data to be sent.And according to the scheme of present Motorola, even littler data also need the process of asking and replying.The frame length of UE request of data is 10 milliseconds, the frame length that Node B scheduling is replied is 10 milliseconds, add Node B and receive the processing time that takes one thing with another after the request, and UE receives the processing time after scheduling is replied, at least need 25 milliseconds, and the data that finally will send out may be one 2 milliseconds EUDCH frame, and just much of that with minimum transmission rate.If the little datagram of application layer more (setting up Handshake Protocol in the process etc. such as what link at TCP/IP), the time-delay of these small datas newspapers will be very big.
Summary of the invention
The objective of the invention is on the basis of the transfer of data framework of asking response type, realize very little and can be with lower transmission rate transmission the time when the data volume that needs to send, UE can promptly send these data on one's own initiative, thereby can effectively reduce the propagation delay time of small data newspaper.
For achieving the above object, a kind of UE comprises step to the active transmission method of small data newspaper:
Define a data transmission rate MBR as reference value;
If the transmission rate of UE is less than MBR, UE sends the indication information of active upload data;
Node B monitors the uplink scheduling information control channel of each UE, receives that UE is about to upload the fresh information of data;
Node B receives the information of uploading of UE in the time period of definition.
The present invention has reduced the propagation delay time of small data newspaper, for the transmission of small data newspaper, if its data rate is less than the maximum active transmission data rate of system's regulation, just can carry out transfer of data initiatively.Thereby can reduce to adopt the request-reply mode to send the bigger time delay that the small data newspaper brings.The present invention will carry out active transmission with the bit information indication UE of physical layer, the not extra signaling that increases high level.Because the code word that the present invention has only used the uplink scheduling information control channel, the hardware that does not increase any Node B or UE is changed.Therefore, very little with respect to original scheme change, in the design of hardware, also be easy to realize.
Description of drawings
Fig. 1 is a uplink scheduling information control channel schematic diagram;
Fig. 2 is a descending scheduling specified control channel schematic diagram;
Fig. 3 is up TFRI control channel schematic diagram;
Fig. 4 is a kind of change back uplink scheduling information control channel schematic diagram;
Fig. 5 is data transmission flow figure.
Embodiment
In order to solve the delay problem of small data newspaper, the present invention proposes under certain conditions, and UE can send data on one's own initiative.The present invention will be described to divide two parts below.The first so-called ground of definition " certain condition ", second portion are described and are initiatively sent the ground process.
1.UE initiatively send the condition of data
At first, system need define the maximum data rate (being called for short MBR) that initiatively sends of a permission.MBR is used for limiting UE to carry out initiatively carrying out the maximum data rate that transfer of data allowed.If the needed transmission rate of UE is less than or equal to MBR, then active data transmission can be carried out, otherwise the request of transmission data must be sent, accept the scheduling arrangement of Node B and carry out the data transmission.
When Node B received data, big data rate must be big received power, the received power that little data transmission rate is corresponding less.In order to reduce the possibility that noise increases suddenly appears when Node B receives, so when selecting MBR, should get less value as far as possible.For the value of MBR, UE can have several different methods to know.
1) notifies the MBR of this sub-district at the broadcast channel (Broadcast Channel) of sub-district
2) when the EUDCH channel is set up, RNC is by RRC signaling UE
3) MBR is fixed, write standard.Do not need to reinform UE.
The computational methods of the transmission rate that UE needs are:
DataRate
UE＝DataSize/n*TTI
DataSize: the size that needs the transmission data
N: the number of the TTI that plan is used
Its essence is exactly to need the time of the data of transmission divided by these data of planned transmission, draws the speed of transmission data.Here, the length of a TTI is meant the length of data transmission channel, may be 10 milliseconds, also may be 2 milliseconds, perhaps other value.
2.UE initiatively send the process of data
In the scheme of Nokia, the process that UE initiatively sends data is as follows:
Utilize RR=" Down " expression UE will carry out active transmission at next frame.And be not to revise the current UE threshold value of UE.Because in former scheme, only utilized RR=up and DTX (not sending), do not use the information of RR=Down.
In the scheme of Motorola, the process that UE initiatively sends data is as follows:
If the data rate of UE is smaller or equal to MBR, UE then selects initiatively to send data.But NodeB can not monitor TFRI and the data channel (EUDCH) of each UE constantly.Because if like this, with the reception burden of to a great extent increase Node B.But Node B is the uplink scheduling information control channel of constantly monitoring each UE, because UE may carry out the request that data send by this channel at any time, this also is must accomplish at the data transmission scheme Node B of request response type.The present invention increases an indication information that initiatively sends in the uplink scheduling information control channel, prepare to receive TFRI and the corresponding data information that this UE sends with notice Node B.
There are two kinds of methods to realize above-mentioned purpose.A kind of is that bit of increase in the uplink scheduling information control channel is represented initiatively to send the indication or the normal request that sends data of data with this bit.See Fig. 4.
Another kind of implementation method is: in the uplink scheduling information control channel, use a code word of being made up of data queue size and the shared bit of transmitting power and get final product.Reason is that when carrying out initiatively sending the data indication, data queue size in the uplink scheduling information control channel and transmitting power are nonsensical, can use these bits will carry out initiatively sending the information of data at this UE of expression.For example in present Motorola scheme, the uplink scheduling information control channel is that 8 bits are arranged, and 4 table of bits registrations are according to queue size, and 4 bits are represented the transmitting power size.Can define when 8 bits all are zero and represent that UE will carry out initiatively sending data (seeing the following form) in the ensuing time.
| Bits in USICCH | Meaning |
| 0,000 0000 | This UE carries out initiatively sending data at T constantly. |
| ??0001????0000 | Queue-size???1， Power-Margin?0 |
| ??0010????0001 | Queue-size??10， Power-Margin?1 |
| ??...... | ...... |
Chart 1 is used the indication information that a code word initiatively sends as UE
Definition time skew T.Consider the processing delay of Node B, define a time migration T the uplink scheduling information control channel.Node B is receiving that T that UE initiatively sends data indications after the time, will receive TRFI and the Frame of UE.
Fig. 5 has described the data flow process being used in combination of the present invention with request response type transfer of data.
501 in that the data generation of application layer is arranged sometime, need send it to wireless network.
502 UE are the size of datagram as required, calculates needed transmission rate.
Whether 503 transmitted data rates are no more than the maximum active transmission speed of system's appointment, if then carry out the operation that UE initiatively sends data, go to 504, otherwise, carry out the normal data transfer solicit operation, go to 507
504UE sends the indication information (the full zero setting of bit of Queue-Size and Power-Margin is represented initiatively to send data) that initiatively sends data by the uplink scheduling information control channel, and notice Node B prepares to receive UE and sends data.
505T constantly after, by up TFRI control channel, the TFRI information of UE transmission data initiatively.
506 in the frame time, send data on the EUDCH code channel after TFRI, send data after, going to 511 (has ignored in the HARQ agreement here, Node B ACK/NACK, concrete operations such as UE re-transmission are because the discussion of it and this method direct relation not).
507 because the data rate that needs is higher than the maximum active data transmission speed of system.UE sends the request that needs to send data by the uplink scheduling information control channel to Node B, provides the size of data queue on the Queue-Size bit, provides the size of transmitting power on the bit of Power-Margin.
508Node B calculates the quality of the transmission channel of UE according to Power-Margin, and relatively other sends the rank of the noise of the situation of UE of request and current Node B, select one to two UE, it is sent replying of transfer of data by descending scheduling specified control channel.
509UE in the moment of appointment, sends the TFRI information of Frame according to the control information of descending scheduling specified control channel by the TFRI control channel
510 send after the TFRI, then send data on the EUDCH code channel.Go to 511 (506 is identical together, ignored the certain operations process of HARQ here) after distributing data.
511 data send and finish, and wait for gathering data arrival next time.
Claims (8)
1. a UE comprises step to the active transmission method of small data newspaper:
Define a data transmission rate MBR as reference value;
If the transmission rate of UE is less than MBR, UE sends the indication information of active upload data;
Node B monitors the uplink scheduling information control channel of each UE, receives that UE is about to upload the fresh information of data;
Node B receives the information of uploading of UE in the time period of definition.
2. by the described method of claim 1, it is characterized in that: the computational methods of described transmission rate are:
DataRate
UE＝DataSize/n*TTI
3. by the described method of claim 2, it is characterized in that: the length of described TTI is meant the length of data transmission channel (EUDCH).。
4. by the described method of claim 1, it is characterized in that described MBR value broadcasts in broadcast channel, perhaps during the EUDCH channel initialization between UE and RNC, give UE by the RRC signaling the value of MBR, perhaps define a MBR value in standard, all UE are worth with this.
5. by the described method of claim 1, it is characterized in that: when UE notice Node B was about to carry out initiatively sending data, the information bit composition code word of the uplink scheduling information control channel by a reservation was represented.
6. by the described method of claim 1, it is characterized in that: when UE notice Node B is about to carry out initiatively sending data, represent by increasing a bit at present uplink scheduling information control channel.
7. by the described method of claim 1, it is characterized in that: when UE notice Node B is about to carry out initiatively sending data, use the up signaling RR of present physical layer, will initiatively send data by using the present RR otiose value of institute (Down) expression.
8. by claim 5 or 6 described methods, it is characterized in that: Node B after the time, receives TFRI and the corresponding Frame of this UE at T after the indication of receiving the UE active upload.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA03103702XA CN1523796A (en) | 2003-02-17 | 2003-02-17 | Method of active transmission from UE to small datagrams |
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| CNA03103702XA CN1523796A (en) | 2003-02-17 | 2003-02-17 | Method of active transmission from UE to small datagrams |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103428677A (en) * | 2012-05-17 | 2013-12-04 | 上海晨兴希姆通电子科技有限公司 | Method for sending grouped service data and method for receiving message sent by signaling channel |
| CN101142761B (en) * | 2005-01-21 | 2014-12-24 | 英特尔公司 | Method, device and method using during radio frame exchange |
| CN104969586A (en) * | 2013-12-30 | 2015-10-07 | 华为技术有限公司 | Method for transmitting small data packet, base station, and user equipment |
-
2003
- 2003-02-17 CN CNA03103702XA patent/CN1523796A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101142761B (en) * | 2005-01-21 | 2014-12-24 | 英特尔公司 | Method, device and method using during radio frame exchange |
| CN103428677A (en) * | 2012-05-17 | 2013-12-04 | 上海晨兴希姆通电子科技有限公司 | Method for sending grouped service data and method for receiving message sent by signaling channel |
| CN103428677B (en) * | 2012-05-17 | 2018-02-06 | 上海晨兴希姆通电子科技有限公司 | The sending method and signaling channel of grouping busihess data send the method for reseptance of information |
| CN104969586A (en) * | 2013-12-30 | 2015-10-07 | 华为技术有限公司 | Method for transmitting small data packet, base station, and user equipment |
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