CN1893344A - Multi-carrier-wave communication system TSO time-slot resource distribution method and grouped data transmission method - Google Patents
Multi-carrier-wave communication system TSO time-slot resource distribution method and grouped data transmission method Download PDFInfo
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Abstract
The method of allocation divides all carriers in same cell into main carrier and subsidiary carrier. TSO time slot of subsidiary carrier is in use for resources of down going operation so as to raise use ratio of system resources. In addition, wave packet forming technique is adopted in the invention to transmit operation data of TSO time slot of all subsidiary carriers so as to reduce interference of TSO information between different cells. Allocating TSO time slot of subsidiary carrier to operation channel and control channel of multicarrier HSDPA, the invention raises capacity of system, and increases HSDPA capacity of transmitting packet operation.
Description
Technical field
The present invention relates to the communications field, relate in particular to HSDPA (high speed downlink packet access) technology, particularly relevant for the distribution of multi-carrier communications systems TS0 time interval resource and the group data transmission method of multi-carrier HSDPA.
Background technology
Tenability to the high-speed mobile Packet data service is one of 3G system most important character.The data rate that WCDMA R99 version can provide peak rate to reach 2Mbps, this speed is enough substantially for the existing Packet Service of major part.Yet, to flow and data service such as video, Streaming Media and the download etc. of delaying having relatively high expectations, need system that higher transmission rate and shorter time delay are provided for many.
For this reason, the HSDPA technology is that 3GPP is organized in a kind of technology of introducing in the R5 version.HSDPA not only supports the asymmetric data, services of high speed, and operator's input cost is minimized.It is UMTS (Universal Mobile Telecommunications System: Universal MobileTelecommunications System) more high data rate and more high power capacity an evolution approach stably is provided.The HSDPA technology of R5 version abundant design philosophy and experience with reference to CDMA20001X EV-DO, increase a high speed shared channels (HS-DSCH) newly, HS-DSCH makes through-put power, channel resource etc. can unify to utilize, and according to user's actual conditions dynamic assignment, thereby improved resource utilization.
Realize existing a time slot (as the TS0 time slot) to be used for broadcast system information usually in the grouped data high-speed transfer process in existing single carrier HSDPA system.And system adopts omnidirectional antenna to come broadcast usually, so that the user of diverse location receiving system message well in the same sub-district.See also Fig. 1, it is physical layer frame structure schematic diagram in the existing TD-SCDMA communication system.The TDD system physical layer adopts three-decker: radio frames, subframe, time slot.Each radio frames frame length is 10ms, the subframe that it comprises two frame lengths is 5ms; Each subframe comprises time slot TS0-time slot TS6 totally seven business time-slots, simultaneously, comprises three special time slots between time slot TS0 and time slot TS1: descending pilot frequency time slot (DwPTS), protection time slot (GP) and uplink pilot time slot (UpPTS).Descending pilot frequency time slot is used for the transmission of the down-going synchronous information of system, and uplink pilot time slot is used for the uplink synchronous information transmission that the user inserts, and the protection time slot is used to provide the slot time of descending sending time slots to up sending time slots conversion.And time slot TS0 fixed allocation is a descending time slot, is used to broadcast system information.Time slot TS1 fixed allocation is given ascending time slot, and the distribution of other up-downgoing business time-slots can be a dynamic assignment.
For the performance of further raising system, the applicant has proposed to adopt the multi-carrier HSDPA technology to strengthen the transmittability of Packet data service.But, for the multi-carrier TD-SCDMA communication system, if on the TS0 time slot of the different carrier frequency of each sub-district (sub-district of multi-carrier communications systems described herein comprises a plurality of carrier waves), all adopt omnidirectional antenna broadcast mode transmitting system message, the TS0 time slot that then has same carrier on the different districts will the phase mutual interference, has had a strong impact on the reception of user to system information.And, only exist to adopt the single carrier transmission mode of HSDPA in the prior art, make the speed of grouped data be subjected to the technical problem of the restriction of channel resource.
Summary of the invention
The object of the present invention is to provide the distribution method of TS0 time interval resource in each sub-district of multi-carrier communications systems, to solve in the prior art if the TS0 time slot allocation of each carrier wave of same sub-district is used for broadcast message, the TS0 time slot that then has same carrier on the different districts will the phase mutual interference, has had a strong impact on the technical problem of user to the reception of system information.
Another object of the present invention is to provide the group data transmission method of multi-carrier HSDPA, only have the single carrier transmission mode that adopts HSDPA, make the speed of grouped data be subjected to the technical problem of the restriction of channel resource to solve in the prior art.
For addressing the above problem, the invention discloses a kind of multi-carrier communications systems TS0 time-slot resource distribution method, comprising: A: choosing a carrier wave in all carrier waves of same sub-district is main carrier, other carrier waves are auxilliary carrier wave; B: the broadcast message of the TS0 time slot transmitting system of main carrier, the TS0 time slot of all auxilliary carrier waves are used for the downlink business resource and use.
And the TS0 time slot of all auxilliary carrier waves is used for the downlink business resource and uses and to comprise among the step B: the TS0 time slot of all auxilliary carrier waves is used for the transmission of HSDPA business information and/or the transmission of control information.
In addition, the present invention can also select with the main carrier of adjacent cells of cells not at the carrier wave of same carrier frequency main carrier for this sub-district.
The invention discloses a kind of group data transmission method of multi-carrier HSDPA, comprising: (1) multi-carrier HSDPA carries out resource allocation: A: choosing a carrier wave in all carrier waves of each sub-district is main carrier, and other carrier waves are auxilliary carrier wave; B: the TS0 time slot of main carrier is used for the broadcast message of transmitting system, the idling-resource of the TS0 time slot of all auxilliary carrier waves and other idling-resources of all auxilliary carrier waves and main carrier is formed the idle channel resources of sub-district, selects part or all of channel resource allocation to give the HS-DSCH channel and the uplink/downlink control channel of this sub-district from described idle channel resources; (2) in data transmission procedure, the transmission data answering information that network side reports by ascending control channel according to each user terminal and the channel quality indication of user terminal, select the user terminal of service of following one-period and the channel resource and the transformat of employing, and send described control information by down control channel; (3) network side sends data by the HS-DSCH channel.
Information on the auxilliary carrier wave TS0 time slot is to adopt the beam shaping technology to send.
The resource allocation that the selective channel condition is good from idle channel resources among the step B is to the HS--DSCH channel and the uplink/downlink control channel of this sub-district, and the number of resources of described selection is used for the number of resources of HSDPA more than or equal to default sub-district.Preferably, described channel condition is meant that well the interference of channel is little.
Compared with prior art, the present invention has the following advantages: in the multi-carrier communications systems provided by the invention in the distribution method of TS0 time interval resource, all carrier waves of same sub-district are divided into main carrier and auxilliary carrier wave, the TS0 time slot of all auxilliary carrier waves all is used for the downlink business resource to be used, and has improved usage factor of system resource.And the business datum of the TS0 time slot of all auxilliary carrier waves all can adopt the wave beam forming technology to send, and has reduced the interference between the TS0 information of same carrier frequency in the different districts thus.
The invention provides a kind of group data transmission method of multi-carrier HSDPA, can Traffic Channel and the control channel of the TS0 time slot allocation of carrier wave in multi-carrier HSDPA will be assisted, improve power system capacity, increased the channel resource of transmission data, and then increased the ability of HSDPA transmission Packet Service.
Description of drawings
Fig. 1 is physical layer frame structure schematic diagram in the existing TD-SCDMA communication system;
Fig. 2 is the distribution method of TS0 time interval resource in the multi-carrier communications systems of the present invention;
Fig. 3 is the flow chart of the group data transmission method of multi-carrier HSDPA of the present invention.
Embodiment
Below in conjunction with accompanying drawing, specify the present invention.
The communication system of multicarrier as all send the message of omnidirectional on the TS0 time slot of the different carrier frequency of same sub-district, is not only wasted resource, and have the TS0 time slot of same carrier on the different districts will the phase mutual interference, and the user terminal reception is not good.The applicant had once proposed the distribution method of a sub-district N carrier wave TS0 time slot.Promptly in N carrier wave of a sub-district, have only the broadcast system information of a carrier wave, other carrier waves obtain corresponding cell information by this carrier broadcast.Though this method has solved the problem of phase mutual interference between the TS0 time slot of the same carrier frequency of different districts, the free time of the TS0 time slot of other carrier waves is significant wastage to system resource.For this reason, the applicant provides the distribution method of TS0 time interval resource in a kind of multi-carrier communications systems.
See also Fig. 2, it is the distribution method of TS0 time interval resource in the multi-carrier communications systems of the present invention.It may further comprise the steps:
S110: choosing a carrier wave in all carrier waves of same sub-district is main carrier, and other carrier waves are auxilliary carrier wave;
S120: the broadcast message of the TS0 time slot transmitting system of main carrier, the TS0 time slot of all auxilliary carrier waves is used for the use of downlink business resource.For a communication system, RNC is known the communication channel resource conditions of each sub-district in the native system and the service terminal situation of each sub-district.RNC can specify the main carrier of a carrier wave as this sub-district arbitrarily for each sub-district, also the main carrier of same carrier wave as this sub-district can be specified in all sub-districts in the native system, can certainly according to the main carrier of neighbor cell as far as possible not the principle on same carrier wave a carrier wave is the main carrier of this sub-district for each sub-district is chosen wherein.
RNC also can be from all carrier waves of sub-district the best carrier wave of selective channel condition as main carrier, described channel condition preferably can be meant the interference minimum of channel.Certainly, channel condition well can be meant also that the idling-resource of carrier wave is many.The present invention illustrates how to select main carrier with a following embodiment.
At first, the present invention is provided with the reference conditions of channel condition, and when the carrier wave that disturbs less than threshold value A, its interference is little, disturbs the carrier wave between certain two threshold value A, B, and it disturbs better, and it disturbs the carrier wave greater than threshold value B, and its interference is poor.
Then, all carrier waves with the sub-district are divided into the little carrier wave set of interference, disturb the carrier wave set of carrier wave set, interference difference preferably by disturbing factor.
Subsequently, from disturb little carrier wave set, find the maximum carrier wave of idling-resource as the preliminary election main carrier, whether the preliminary election main carrier of judging this sub-district then has identical with the main carrier of the neighbor cell of this sub-district, if do not have identical, then the main carrier in advance of this sub-district is the main carrier of this sub-district, otherwise, from disturb little carrier wave set, find idling-resource time carrier wave how as the preliminary election main carrier, whether the preliminary election main carrier of judging this sub-district then has identical with the main carrier of the neighbor cell of this sub-district, if do not have identical, then the main carrier in advance of this sub-district is the main carrier of this sub-district, otherwise, select the preliminary election main carrier again, in the time of in disturbing little carrier wave set, can't selecting the preliminary election main carrier, can select the carrier wave set from disturbing preferably, and the like, the main carrier of this sub-district elected.
The broadcast message of the TS0 time slot transmitting system of main carrier is so that the user terminal of this sub-district can receive the information of this sub-district.User terminal can be by the high-rise main carrier information that obtains, as the carrier frequency of main carrier in the sub-district.User terminal also can be at the beginning of access network, by just searching the main carrier information that obtains.Such as: user terminal detects the TS0 time slot on all carrier waves, and the broadcast message of transmitting on which TS0 time slot can determine that it is main carrier.Generally, the configuration information that also includes the multicarrier carrier frequency in the broadcast message.For example: the carrier wave sequence number of employing, frequency point number, the number of carrier wave, message such as the sequence number of main carrier.
With HSDPA is example, in search of initial zone, when user terminal searches a sub-district, the descending pilot frequency that detected cells sent, set up down-going synchronous, obtain cell scrambling and basic midable sign indicating number, the control multiframe is synchronous, read the BCH broadcast message of sub-district then, so that the data communication of foundation and network side.And when user terminal is under the idle pulley, it will keep down-going synchronous and read broadcast message.The form that some channel informations, parameter information (as sign indicating number, spreading factor, midable sign indicating number, time slot), transfer of data adopt etc. all can be broadcasted on BCH, and the TS0 time slot of user terminal main carrier can obtain those broadcast messages.
The TS0 time slot of all auxilliary carrier waves is used for the use of downlink business resource.This descending time slot can dynamic assignment channel resource, improved usage factor of system resource.
In the HSDPA of multicarrier, the TS0 time slot of all auxilliary carrier waves can be used for the transmission of HSDPA Traffic Channel and/or the transmission of control channel.Such as: other the idle time slots of the TS0 time interval resource of all auxilliary carrier waves and all auxilliary carrier waves and the idle time interval resource of main carrier are bundled the transmission that part or all of resource is used for HSDPA business information and control information together.Such as: the TS0 time slot allocation of all auxilliary carrier waves to HS-DSCH Traffic Channel is used to transmit Packet Service, and perhaps the TS0 time slot allocation of all auxilliary carrier waves to HS-SCCH control channel is used to transmit Downlink Control Information; Perhaps TS0 time slot allocation to the HS-DSCH Traffic Channel of the auxilliary carrier wave of part is used to transmit Packet Service, and TS0 time slot allocation to the HS-SCCH control channel of the auxilliary carrier wave of part is used for control information transmission.Only need in the present invention the TS0 time slot on all auxilliary carrier waves to be distributed as the information resources of system and manage.
In order to reduce the interference to other sub-districts, auxilliary carrier wave TS0 goes up the business information that sends and adopts the beam shaping technology.Under the multi-carrier HSDPA environment, all of auxilliary carrier wave TS0 time slot can be used to traffic channel transmission, main cause is: the TD-SCDMA system has adopted intelligent antenna technology, and the business time-slot channel information adopts the beam shaping mode of directional transmissions according to customer location.This beam shaping technology will send concentration of energy on certain orientation, reaching under the situation of same performance, can reduce transmitted power, improve the clever lightness of receiving equipment.Beam shaping can reduce in the sub-district interference and to the interference of adjacent sub-district, and then improve the capacity of system.Directional transmissions information can not cause big interference with the transmission information on the frequency carrier wave to other sub-district.Auxilliary carrier wave TS0 time slot is used to send downlink business, can not increase the interference of system, and can improve the capacity of system significantly.
Based on the method for TS0 distributing slot resources in the above-mentioned multi-carrier communications systems, the present invention proposes a kind of group data transmission method of multi-carrier HSDPA.See also Fig. 3, it is the flow chart of the group data transmission method of multi-carrier HSDPA of the present invention.It comprises:
S210: multi-carrier HSDPA carries out resource allocation
A: choosing a carrier wave in all carrier waves of each sub-district is main carrier, and other carrier waves are auxilliary carrier wave;
B: the TS0 time slot of main carrier is used for the broadcast message of transmitting system, the idling-resource of the TS0 time slot of all auxilliary carrier waves and other idling-resources of all auxilliary carrier waves and main carrier is formed the idle channel resources of sub-district, selects part or all of channel resource allocation to give the HS--DSCH channel and the uplink/downlink control channel of this sub-district from described idle channel resources; Generally, the resource allocation that the selective channel condition is good from idle channel resources is to the HS-DSCH channel and the uplink/downlink control channel of this sub-district, and the number of resources of described selection is used for the number of resources of HSDPA more than or equal to default sub-district.Described channel condition is meant that well the interference of channel is little.
S220: in data transmission procedure, the transmission data answering information that network side reports by ascending control channel according to each user terminal and the channel quality indication of user terminal, select the user terminal of service of following one-period and the channel resource and the transformat of employing, and send described control information by down control channel;
At the beginning of user terminal and network side are set up packet data transmission, when network side is given user terminal to transmit data for the first time, transmit control channel by down control channel in advance, user terminal receives described control information, carries out the reception of HS-DSCH channel data.When the subsequent packets transfer of data, network side can carry out the transmission of data next time by user terminal through the ascending control channel feedback channel.Usually, user terminal can carry out channel measurement, and feedback informations such as channel measurement result are sent to network side by ascending control channel.Comprise the size of transmission data block of user terminal suggestion and modulation format etc. in the channel quality indication.
Network side is indicated according to described channel quality, selects the user terminal of service of following one-period and the channel resource and the transformat of employing.When transmitting data at every turn, network side is according to transmission data answering message and the user terminal channel quality indication of each user terminal by the ascending control channel feedback, need to select the user terminal of service according to dispatching algorithm, and determine the channel resource that adopts and send form.
Network side sends control information for described user terminal by down control channel, so that user terminal receives the HS-DSCH channel transmission data according to described control information.；
S230: network side sends data by the HS-DSCH channel.
User terminal can receive the data that the HS-DSCH channel sends by the control information of down control channel transmission.Network side sends grouped data by the HS-DSCH channel.The data that receive when user terminal are wrong and do not exceed maximum retransmission, then by HS-SICH channel notification network side data retransmission, if the data that receive are wrong and exceed maximum number of retransmissions and just abandon these data and send new data by network side, if do not have mistake then can send new data by network side.Sending the response message of data and the channel quality Indication message of user terminal sends by the HS-SICH channel, so that the transmission data answering information of the feedback of network side reception HS-SICH Channel Transmission and the channel quality indication of user terminal, decide next step action: data retransmission still transmits new data etc.
When the RNC decision adopts the resource of a plurality of carrier waves to provide service for HSDPA simultaneously in this sub-district, when being sub-district realization multi-carrier HSDPA, RNC determines the channel resource that HSDPA adopts at first by the aspects such as type of load state, channel condition, disturbed condition and the service of network.
Channel resource includes carrier wave, time slot and code channel etc.Be that RNC determines that earlier this sub-district Node B is used for the carrier number that HSDPA adopts and the carrier frequency of each carrier wave correspondence.RNC chooses from described definite carrier wave wherein that a carrier wave is a main carrier, and other carrier waves are auxilliary carrier wave.The TS0 of main carrier is the broadcast message that is allocated for this sub-district of transmission, and the TS0 time slot of other auxilliary carrier waves can be used as idle descending time slot.RCN determines can use in all carrier waves the idle time slot and the relevant code track resource of HSDPA information again.
The high speed business carrying of HSDPA is mainly finished by high speed downlink shared channel HS-DSCH, and this is the dedicated channel of HSDPA.In addition, have respectively in uplink and downlink a pair of or several to shared control channel (ascending control channel HS-SICH and down control channel HS-SCCH).Therefore, RNC need be assigned the HS-DSCH Traffic Channel, need that user terminal monitors some to HS-SCCH and HS-SICH control channel.In multi-carrier HSDPA, have many usually to HS-SCCH and HS-SICH, manyly may be distributed on the different carrier waves HS-SCCH and HS-SICH, the channel resource of the every couple of HS-SCCH and HS-SICH can not be striden allocation of carriers, and promptly every pair of uplink/downlink control channel resource is limited in the carrier wave.And each multi-carrier HSDPA sub-district has only a HS-DSCH channel, and the resource of this channel can be striden allocation of carriers, and the resource of a plurality of carrier waves is bundled in forms a HS-DSCH channel together.
In order to improve resource utilization and to reduce the difficulty that realizes HSDPA, the HS-SCCH and the HS-SICH of same user terminal can be distributed on the same carrier wave.The idling-resource of the TS0 time slot of all auxilliary carrier waves and other idling-resources of all auxilliary carrier waves and main carrier is formed the idle channel resources of sub-district, selects part or all of channel resource allocation to give the HS-DSCH channel and the uplink/downlink control channel of this sub-district from described idle channel resources; The HS-SCCH of same user terminal and HS-SICH be distributed in implement on the same carrier wave easier.
When user terminal carries out packet data transmission, the network example can choose among the HS-SCCH from M the down control channel HS-SCCH that distributes or N (the individual HS-SCCH of 1＜N＜=M) is as the control channel of this packet data transmission, control information transmission.Because M the down control channel HD-SCCH that the real-time monitoring of user terminal has distributed can obtain control information.Described control information comprises that the assignment information, modulation scheme information, the size of transmission block, procedural information, redundancy version information and the new data indication information etc. of HARQ of carrier wave number and corresponding carrier frequency, sign indicating number and time slot can receive the control information of the data of HS-DSCH channel and the described data of decoding.
Network side issues grouped data, user terminal carries out demodulation, decoding to the data that receive, after CRC check etc. are handled, if it is wrong and surpass maximum retransmission, then by HS-SICH informing network end data retransmission, if maximum retransmission wrong and that surpass just abandons these data and the informing network end sends new data.If do not have wrong then can send new data by the informing network end.The response message of transmission data sends by the HS-SICH channel with the channel quality Indication message of user terminal.Network receives next step processing method of decision behind the HS-SICH.
The TS0 time interval resource of auxilliary carrier wave of the present invention can bundle the transmission that is used for HSDPA business and control information together with the time slot channel resource of this carrier wave and other carrier waves.This channel resource can be distributed to the HS-DSCH Traffic Channel and be used to transmit Packet Service, or the HS-SCCH control channel is used to transmit the Downlink Control Information of multi-carrier HSDPA, under not increasing to the situation of other sub-districts with frequency carrier-in-interference and system complexity, improve power system capacity, increased the ability of HSDPA transmission Packet Service.
More than disclosed only be several specific embodiment of the present invention, but the present invention is not limited thereto, any those skilled in the art can think variation, all should drop in protection scope of the present invention.
Claims (7)
1, a kind of multi-carrier communications systems TS0 time-slot resource distribution method is characterized in that, comprising:
A: choosing a carrier wave in all carrier waves of same sub-district is main carrier, and other carrier waves are auxilliary carrier wave;
B: the broadcast message of the TS0 time slot transmitting system of main carrier, the TS0 time slot of all auxilliary carrier waves are used for the downlink business resource and use.
2, multi-carrier communications systems TS0 time-slot resource distribution method as claimed in claim 1, it is characterized in that the TS0 time slot of all auxilliary carrier waves is used for the downlink business resource and uses and to comprise among the step B: the TS0 time slot of all auxilliary carrier waves is used for the transmission of HSDPA business information and/or the transmission of control information.
3, multi-carrier communications systems TS0 time-slot resource distribution method as claimed in claim 1 is characterized in that, selection is not the main carrier of this sub-district at the carrier wave of same carrier frequency with the main carrier of adjacent cells of cells.
4, a kind of group data transmission method of multi-carrier HSDPA is characterized in that,
(1) multi-carrier HSDPA carries out resource allocation
A: choosing a carrier wave in all carrier waves of each sub-district is main carrier, and other carrier waves are auxilliary carrier wave;
B: the TS0 time slot of main carrier is used for the broadcast message of transmitting system, the idling-resource of the TS0 time slot of all auxilliary carrier waves and other idling-resources of all auxilliary carrier waves and main carrier is formed the idle channel resources of sub-district, selects part or all of channel resource allocation to give the HS--DSCH channel and the uplink/downlink control channel of this sub-district from described idle channel resources;
(2) in data transmission procedure, the transmission data answering information that network side reports by ascending control channel according to each user terminal and the channel quality indication of user terminal, select the user terminal of service of following one-period and the channel resource and the transformat of employing, and send described control information by down control channel;
(3) network side sends data by the HS-DSCH channel.
5, the group data transmission method of multi-carrier HSDPA as claimed in claim 4 is characterized in that, the information on the auxilliary carrier wave TS0 time slot is to adopt the beam shaping technology to send.
6, the group data transmission method of multi-carrier HSDPA as claimed in claim 4, it is characterized in that, the resource allocation that the selective channel condition is good from idle channel resources among the step B is to the HS--DSCH channel and the uplink/downlink control channel of this sub-district, and the number of resources of described selection is used for the number of resources of HSDPA more than or equal to default sub-district.
7, the group data transmission method of multi-carrier HSDPA as claimed in claim 4 is characterized in that, described channel condition is meant that well the interference of channel is little.
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