CN1283111C - A spread spectrum code and time slot distribution method in mobile communication system - Google Patents
A spread spectrum code and time slot distribution method in mobile communication system Download PDFInfo
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- CN1283111C CN1283111C CN 03104910 CN03104910A CN1283111C CN 1283111 C CN1283111 C CN 1283111C CN 03104910 CN03104910 CN 03104910 CN 03104910 A CN03104910 A CN 03104910A CN 1283111 C CN1283111 C CN 1283111C
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Abstract
The present invention discloses an allocation method for spread spectrum codes and time slots in a communication system. The present invention comprises the following steps: step A, after one party of two communication parties transmits a communication request to the other party of the two communication parties, a control unit in the current communication system is informed to carry on the allocation of the spread spectrum codes and the timeslots; step B, the control unit in the step A allocates the current spread spectrum codes or the current time slots for one link of communication links in the transmitting directions and the receiving directions of the communication parties through signaling according to the service conditions of the spread spectrum codes or the time slots of the current system; the current corresponding time slot or the current corresponding spread spectrum codes are determined for the other link according to the preset coincidence relations of the spread spectrum codes and the time slots used by the communication links in the transmitting directions and the receiving directions, and the two communication parties both know the spread spectrum codes and the time slots used by the current communication. The method completes the allocation of the spread spectrum codes and the time slots through the signaling and the coincidence relations of the spread spectrum codes and the time slots of the communication links in the transmitting directions and the receiving directions, and saves signaling resources.
Description
Technical field
The present invention relates to communication technical field, relate in particular to the spreading code in the communication system and the problem of time slot allocation.
Background technology
Current, mechanics of communication just flies swift and violent speed to dash forward and is developed.Wherein, wireless communication system from the analog communication era development of initial frequency division multiple access (FDMA) to the current third generation (3G) the mobile communication epoch.The COS of communication traffic also develops into current high speed data transfer business from initial simple voice service.In the various wireless communication systems of current application, generally all be that a plurality of users share limited shared resource in the communication system.At different COS, user institute resources shared difference, a plurality of users can share a frequency range, a time period or a code channel.For example, as shown in Figure 1, in FDMA, the whole system bandwidth is divided into frequency channels and distributes to each user, and each user utilizes frequency channels separately to finish communication; As shown in Figure 2, in time division multiple access (TDMA), each frequency channels is divided into time slot, and each user is arranged in separately the time slot, and each time slot comes transmission information as the bearing resource of the communication information, to finish communication; As shown in Figure 3, in code division multiple access (CDMA), distribute to unique encoding sequence of each user, be spreading code, be used for its carry information signals is encoded, after receiver obtains user's spreading code, can decode and recover initial data the signal that receives, finish communication with this, herein, with spreading code as the information-bearing resource.This shows that each communication system all needs to finish the information-bearing resource allocation to each user, and, being accompanied by current growing communication user quantity, this problem becomes more important.This problem solves well, just can improve the service efficiency of communication system greatly, otherwise, then can cause negative effect to the use of communication system.
In each current communication system, there are two kinds of communication form of type of interaction and nonreciprocal type, for the nonreciprocal type communication, communicating pair only carries out one-way communication, therefore only need distribute its folk prescription that needs separately to get final product to link circuit resource respectively to communicating pair.For type of interaction communication, the communication party all needs both to have finished sending function and also finishes receiving function, and communicating pair sends and finish receiving interactive communication each other.In type of interaction communication, generally all need finish with the receive direction link and communicate by letter by the sending direction link, and generally all adopt uplink downlink to use as sending direction link and receive direction link respectively, current techniques generally all is to finish distribution to each user's up-downgoing information-bearing resource respectively with two incoherent instructions.For example in the global system for mobile communications (GSM) of the second generation (2G) mobile communication standard, shared resource is the time period, passes through two incoherent instructions required time slot positions of designated user up-downgoing in communication process respectively by base station controller (BSC); In the wideband CDMA (WCDMA) of 3G standard, shared resource is a code word for another example, is finished the appointment of up-downgoing code source respectively by two incoherent instructions by radio network controller (RNC).Can find by prior art, no matter be 2G or 3G communication system, all be to finish appointment to up-downgoing information-bearing resource by two incoherent instructions, doing so on the one hand to make system's controlling party expend more signal resource, on the other hand, also can increase the unsteadiness of system owing to the resource allocation process of complexity.
Summary of the invention
In view of this, main purpose of the present invention is to provide spreading code and the slot allocation method in a kind of communication system, can realize utilizing less signaling to finish to sharing the distribution of spreading code and time slot in the communication system, thereby simplify the assigning process of spreading code and time slot, and then increase the stability of system.
The present invention is spreading code and the slot allocation method in a kind of communication system, control unit in the system is used in the spreading code and the time slot of communication for the communicating pair branch by signaling, when communication is the nonreciprocal type, adopt two communication links distribution spreading code and the time slot of incoherent signaling respectively for each communication party, when communication is type of interaction, it is characterized in that this method may further comprise the steps:
After direction the opposing party of A, communicating pair sends communication request, notified spreading code and the time slot allocation of carrying out of the control unit in the communication system;
B, the described control unit of steps A be according to the operating position of current system spread-spectrum sign indicating number or time slot, by signaling sending direction that is the communication party and current use spreading code of a link assignment or the time slot in the receive direction communication link;
C, use the corresponding relation of spreading code and time slot according to predefined sending direction and receive direction communication link, for another link is determined corresponding current use time slot or spreading code, and the spreading code and the time slot that make communicating pair know that all current signal post will use.
Wherein, the control unit in the described communication system is a radio resource controller.
Wherein, among the step B, described distribution spreading code or time slot are: the number of described spreading code of allocation identification or time slot; Among the step C, described definite spreading code or time slot are: the number of determining described spreading code of sign or time slot.
Wherein, this method further comprises: preestablish the corresponding relation between described sending direction and receive direction communication link use spreading code and the time slot, and be stored in communicating pair respectively.
Wherein:
Step B is the operating position of described control unit according to current system spread-spectrum sign indicating number and time slot, is current use spreading code or the time slot that communicating pair distributes any communication link by same signaling respectively;
Step C is that the sending direction stored in advance according to self respectively of communicating pair and receive direction communication link use the corresponding relation between spreading code and the time slot, determines and corresponding current use time slot of corresponding another link of distribute links or spreading code.
Wherein:
Step B is the operating position of described control unit according to current system spread-spectrum sign indicating number and time slot, is the current use spreading code or the time slot of any communication link of side distribution in the communicating pair by a signaling;
Sending direction that step C stores according to self in advance for this root of communicating by letter and the corresponding relation between receive direction communication link spreading code and the time slot determine and corresponding current use time slot of corresponding another link of distribute links or spreading code that this communication side is notified to the opposing party that communicates by letter with the definite sending direction and the current use spreading code of receive direction communication link with time slot again.
Wherein, this method further comprises: after the control unit in communication system was set described corresponding relation, this control unit sent this corresponding relation to communicating pair by notification message.
Wherein, this method further comprises: when control unit in the system is adjusted sending direction and receive direction communication link and is used corresponding relation between spreading code and the time slot, control unit will this adjusted sending direction and receive direction communication link use spreading code and time slot between corresponding relation be notified to communicating pair.
Wherein, this method further comprises: preestablish and store the corresponding relation between described sending direction and receive direction communication link use spreading code and the time slot in control unit.
Wherein:
Step B is the operating position of described control unit according to current system spread-spectrum sign indicating number and time slot, for any communication link distributes current use spreading code or time slot;
To be control unit use corresponding relation between spreading code and the time slot according to the sending direction of storage in advance and receive direction communication link to step C, determines and corresponding current use time slot of corresponding another link of distribute links or spreading code; The current use spreading code of two communication links that control unit will be determined again and time slot are by same signaling difference notifying communication both sides.
Wherein, in step B, when sending direction and receive direction communication link all need more than one unit spreading code or time slot, this method comprises: the control unit in the system is more than one unit spreading code or time slot composition group, is the group number of link assignment spreading code in communication party's sending direction and the receive direction communication link or time slot group.
As seen, the present invention is in sending direction and the receive direction communication link one by a signaling and distributes current use time slot or spreading code, afterwards, determine the use spreading code or the time slot of another link correspondence according to the corresponding relation between sending direction and receive direction communication link use spreading code and the time slot, all know the use spreading code and time slot of two communication links at communicating pair after, can carry out interactive communication.This method only can be determined sending direction and employed spreading code of receive direction communication link and time slot with an instruction, has reduced expending of signal resource, and makes spreading code relative with the time slot allocation process simple, has guaranteed the stability of system.
Description of drawings
Fig. 1 is the access way schematic diagram of FDMA in the prior art.
Fig. 2 is the access way schematic diagram of TDMA in the prior art.
Fig. 3 is the access way schematic diagram of CDMA in the prior art.
Fig. 4 realizes the flow chart of spreading code and distributing slot resources for the present invention.
Embodiment
Among the present invention, signaling of control unit employing of communication system is that in sending direction and the receive direction communication link distributes current use time slot or spreading code, then, use the corresponding relation of spreading code and time slot to determine the current use spreading code or the time slot of another link correspondence according to sending direction and receive direction communication link, after communicating pair is all known the current use spreading code and time slot of two communication links, utilize and use spreading code and time slot to carry out interactive communication.
Describe the present invention below by specific embodiment, this embodiment is at type of interaction communication, and the communication party will both finish sending function and also finish receiving function, and finishes with the receive direction link by the sending direction link and to communicate by letter.This embodiment realizes with determining all the mode to obtain corresponding spreading code and time slot mark number the distribution of spreading code and time slot.
Can use simultaneously in the communication system of spreading code and time slot, the communication between user and the base station is example.
Referring to shown in Figure 4, when the present invention is applied to use the communication system of spreading code and time slot simultaneously, still utilize radio resource controller to give communicating pair allocate communications resource, respectively with spreading code and time slot as resource allocation unit.So, finish present embodiment and need following steps:
Step 401: when the user need communicate with the base station, user terminal sent business request information to the base station; After the base station receives this request message, by notification message notice radio resource controller, suppose that the current transport service type in the present embodiment is a voice service, radio resource controller judges that according to the type of service in the notification message obtaining the current service needed that will transmit utilizes uplink downlink can finish communication so, so radio resource controller determines that the bearing resource that need carry out the uplink and downlink link respectively distributes;
Step 402: radio resource controller is according to the operating position of current system spread-spectrum sign indicating number resource, give user terminal and the spendable spreading code of base station assigns upstream or downstream link number by a piece of news signaling, in the present embodiment, up link adopts time interval resource, down link adopts spread spectrum code resources, and to give the downlink allocation spreading code of user terminal and base station earlier number be 1;
Step 403: user terminal and base station are respectively according at the corresponding relation between self predefined timeslot number and the spreading code number, obtaining ascending time slot number is 1, in the present embodiment, preestablish corresponding relation between timeslot number and spreading code number and be ascending time slot number and downstream spread spectrum code and number equate;
Wherein, described corresponding relation preestablishes and is stored in simultaneously in base station and the user terminal, relation between predefined spreading code number and the timeslot number also can be other mathematical equation corresponding relation, differ 1 between for example up spreading code number and the descending time slot number, perhaps difference is a constant between spreading code number and the timeslot number; This kind corresponding relation can pass through radio resource controller informing base station and user terminal;
Step 404: communicating pair all obtains the timeslot number that is used to communicate by letter and spreading code number, can use spreading code and time slot to carry out information interaction, finishes communication.
In step 402, also can be that up link is used spread spectrum code resources, down link uses time interval resource, and preestablishes the relation between up spreading code number and the descending time slot number.In addition, radio resource controller can the allocation of downlink resource, determines uplink resource according to corresponding relation then; Also can distribute uplink resource, determine down-chain resource according to corresponding relation then.
In the present embodiment, when radio resource controller the upstream or downstream Resources allocation is adjusted, when causing using resource to change, radio resource controller is given base station or user terminal with the change notification of Resources allocation.
In the present embodiment, when radio resource controller was adjusted the corresponding relation between the uplink and downlink link circuit resource, the corresponding relation after radio resource controller will change was notified to user terminal and base station.
Initiate the situation of communication request for the base station to the user, its process and said process are similar.
In the present embodiment, when according to type of service, when each bar in the uplink downlink all needs to distribute a plurality of unit resource, such as: need one group of spreading code, need several slots or the like simultaneously, radio resource controller is formed a group with a plurality of unit resource, preestablishes the corresponding relation between the uplink downlink resource group, divides timing that the resource group number is distributed to the upstream or downstream link.
In the present embodiment, distribute the process of uplink downlink resource mode as described below to carry out to communicating pair: control unit gives communication one spendable corresponding spreading code of side's terminal distribution upstream or downstream link or time slot by a piece of news signaling, then, this root of communicating by letter is according to the spreading code between two pre-set on one's body communication links and the corresponding relation of time slot, know and the corresponding time slot or the spreading code that distribute corresponding another link of link of spreading code or time slot that the time slot of two communication links that this communication one side will obtain is again given the opposing party that communicates by letter with spreading code by message informing.
Present embodiment also can be kept at the corresponding relation of two communication links in the control unit, control unit is at first determined the use time slot or the spreading code of communication one side's upstream or downstream link in self, determine the use spreading code or the time slot of another link according to being stored in corresponding relation in self then, control unit is given a communicate by letter side with spreading code with a signaling with the uplink and downlink chain time gap of determining, communicating pair communicates behind this uplink downlink time slot and the spreading code through all obtaining alternately again.
As seen, the present invention adopts single signaling to be in sending direction and the receive direction communication link one to distribute current use time slot or spreading code, use the corresponding relation between time slot and the spreading code to determine corresponding current use spreading code of another link or time slot according to sending direction and receive direction communication link.After communicating pair is all known current use time slot and spreading code, use time slot and the spreading code determined to communicate.This method only utilizes single instruction to finish appointment to sending direction and receive direction communication link, has saved signal resource, and makes that spreading code is relative with the time slot allocation process and simplify, thereby has guaranteed the stability of system.
Claims (11)
1, spreading code and the slot allocation method in a kind of communication system, control unit in the system is used in the spreading code and the time slot of communication for the communicating pair branch by signaling, when communication is the nonreciprocal type, adopt two communication links distribution spreading code and the time slot of incoherent signaling respectively for each communication party, when communication is type of interaction, it is characterized in that this method may further comprise the steps:
After direction the opposing party of A, communicating pair sends communication request, notified spreading code and the time slot allocation of carrying out of the control unit in the communication system;
B, the described control unit of steps A be according to the operating position of current system spread-spectrum sign indicating number or time slot, by signaling sending direction that is the communication party and current use spreading code of a link assignment or the time slot in the receive direction communication link;
C, use the corresponding relation of spreading code and time slot according to predefined sending direction and receive direction communication link, for another link is determined corresponding current use time slot or spreading code, and the spreading code and the time slot that make communicating pair know that all current signal post will use.
2, method according to claim 1 is characterized in that: the control unit in the described communication system is a radio resource controller.
3, method according to claim 1 is characterized in that:
Among the step B, described distribution spreading code or time slot are: the number of described spreading code of allocation identification or time slot;
Among the step C, described definite spreading code or time slot are: the number of determining described spreading code of sign or time slot.
4, method according to claim 1 is characterized in that this method further comprises: preestablish the corresponding relation between described sending direction and receive direction communication link use spreading code and the time slot, and be stored in communicating pair respectively.
5, method according to claim 4 is characterized in that:
Step B is the operating position of described control unit according to current system spread-spectrum sign indicating number and time slot, is current use spreading code or the time slot that communicating pair distributes any communication link by same signaling respectively;
Step C is that the sending direction stored in advance according to self respectively of communicating pair and receive direction communication link use the corresponding relation between spreading code and the time slot, determines and corresponding current use time slot of corresponding another link of distribute links or spreading code.
6, method according to claim 4 is characterized in that:
Step B is the operating position of described control unit according to current system spread-spectrum sign indicating number and time slot, is the current use spreading code or the time slot of any communication link of side distribution in the communicating pair by a signaling;
Sending direction that step C stores according to self in advance for this root of communicating by letter and the corresponding relation between receive direction communication link spreading code and the time slot determine and corresponding current use time slot of corresponding another link of distribute links or spreading code that this communication side is notified to the opposing party that communicates by letter with the definite sending direction and the current use spreading code of receive direction communication link with time slot again.
7, method according to claim 4, it is characterized in that this method further comprises: after the control unit in communication system was set described corresponding relation, this control unit sent this corresponding relation to communicating pair by notification message.
8, method according to claim 4, it is characterized in that this method further comprises: when control unit in the system is adjusted sending direction and receive direction communication link and is used corresponding relation between spreading code and the time slot, control unit will this adjusted sending direction and receive direction communication link use spreading code and time slot between corresponding relation be notified to communicating pair.
9, method according to claim 1 is characterized in that this method further comprises: preestablish and store the corresponding relation between described sending direction and receive direction communication link use spreading code and the time slot in control unit.
10, method according to claim 9 is characterized in that:
Step B is the operating position of described control unit according to current system spread-spectrum sign indicating number and time slot, for any communication link distributes current use spreading code or time slot;
To be control unit use corresponding relation between spreading code and the time slot according to the sending direction of storage in advance and receive direction communication link to step C, determines and corresponding current use time slot of corresponding another link of distribute links or spreading code; The current use spreading code of two communication links that control unit will be determined again and time slot are by same signaling difference notifying communication both sides.
11, method according to claim 1, it is characterized in that in step B, when sending direction and receive direction communication link all need more than one unit spreading code or time slot, this method comprises: the control unit in the system is more than one unit spreading code or time slot composition group, is the group number of link assignment spreading code in communication party's sending direction and the receive direction communication link or time slot group.
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| CN 03104910 CN1283111C (en) | 2003-02-28 | 2003-02-28 | A spread spectrum code and time slot distribution method in mobile communication system |
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| CN 03104910 CN1283111C (en) | 2003-02-28 | 2003-02-28 | A spread spectrum code and time slot distribution method in mobile communication system |
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| EP2090004B1 (en) * | 2006-11-15 | 2013-01-02 | Telefonaktiebolaget LM Ericsson (PUBL) | Allocation of spreading codes for telecommunications channels |
| JP4563417B2 (en) * | 2007-03-20 | 2010-10-13 | 株式会社エヌ・ティ・ティ・ドコモ | User apparatus, communication method and communication system in mobile communication system |
| CN101150595B (en) * | 2007-11-13 | 2011-07-20 | 腾讯科技（深圳）有限公司 | A real time file transmission method, system and device |
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