WO2004077853A1 - Resources allocation method in communication system - Google Patents

Abstract

The present invention discloses a method for allocating resources in a communication system, including the following steps: A. For both communication sides, after a communication request could be sent from one side to the other side, a control unit in the current communication system will be informed that it should make resources allocation B. In accordance with the condition of the current system resources, the control unit described in step A will allocate the currently used resources by a signaling for one link of the transmitting and receiving communication link of communication side. C. According to the predetermined corresponding relation of the resources which used by the communication links in the transmitting direction and the receiving direction, the current usage resources of the other link can be determined, and both communication sides will be informed the resources used by the current communication. On the basis of the corresponding relation between the resource numbers of the defined communication links in the transmitting direction and the receiving direction, said method can fulfil the resources allocation, thereby can save the signaling resources, which make the resources allocation process simply and can ensure system stability.

Description

 Resource allocation method in communication system

Technical field

 The present invention relates to the field of communication technologies, and in particular, to a resource allocation method in a communication system. Background of the invention

Currently, communication technology is developing at a rapid pace. Among them, the wireless communication system has developed from the initial analog communication era of frequency division multiple access (FDMA) to the current third generation (3G) mobile communication era. The service type of the communication service has also developed from the original pure voice service to the current high-speed data transmission service. In various wireless communication systems currently in use, multiple users generally share limited shared resources in the communication system. For different service types, users share different resources. For example, multiple users can share a frequency band, a time period, or a code channel. As shown in FIG. 1, in FDMA, the entire system bandwidth is divided into frequency channels and allocated to each user, and each user uses their own frequency channels to complete communication. As shown in FIG. 2, in time division multiple access (TDMA), each Frequency channels are divided into time slots, and each user is arranged in a respective time slot, and each time slot is used as a bearer resource of communication information to transmit information to complete communication. As shown in FIG. 3, in code division multiple access (CDMA), In the method, each user is assigned a unique coding sequence, that is, a spreading code, which is used to encode the information signal of the bearer. After the receiver obtains the user's spreading code, the receiver can decode the received signal and restore the original signal. The data is used to complete the communication. Here, the spreading code is used as the information bearing resource. It can be seen that each communication system needs to complete the allocation of information bearer resources to each user, and this problem is even more important with the current increasing number of communication users. If this problem is solved well, the use efficiency of the communication system can be greatly improved. On the contrary, it will have a negative impact on the use of the communication system. In the current communication systems, there are two types of communication: interactive and non-interactive. For non-interactive communication, the two communicating parties only perform one-way communication. Therefore, it is only necessary to allocate the unidirectional links required by the two communicating parties respectively. Resources. For interactive communication, the communicating parties need to complete both the sending and receiving functions, and the communicating parties send and receive each other to complete the interactive communication. In the interactive type communication, the communication needs to be completed with the help of the sending direction link and the receiving direction link, and the uplink and downlink are generally used as the sending direction link and the receiving direction link, respectively. The current technology is generally based on Two irrelevant instructions to complete the allocation of uplink and downlink information bearer resources for each user respectively. For example in the second generation

(2G) In the global mobile communication system (GSM) of the mobile communication standard, the shared resource is a time period, and the base station controller (BSC) uses two unrelated instructions to specify the timeslots required by the user during the call. Location; as in 3G broadband CDMA

(WCDMA), the shared resource is a codeword, and the radio network controller (RNC) completes the designation of the uplink and downlink codeword resources through two unrelated instructions, respectively. It can be found from the prior art that no matter whether it is a 2G or 3G communication system, the designation of uplink and downlink information bearer resources is completed by two unrelated instructions. Doing so will make the system controller consume more signaling resources On the other hand, the instability of the system will be increased due to the complicated resource allocation process. Summary of the Invention

 In view of this, the main object of the present invention is to provide a resource allocation method in a communication system, which can implement the allocation of shared resources in a communication system with less signaling, thereby simplifying the resource allocation process, thereby increasing the system's stability.

The present invention is a resource allocation method in a communication system. A control unit in the system allocates resources for communication to two communicating parties through signaling. When the communication is a non-interactive type, two unrelated signalings are used for each Resources for communication links of two communicating parties, when communication is interactive The type is characterized in that the method includes the following steps:

 A. After one of the two communication parties sends a communication request to the other party, the control unit in the current communication system is notified to perform resource allocation;

 B. The control unit described in step A allocates the current use resource for a link in the sending direction and the receiving direction of the communication link of the communicating party through a signaling according to the current use of system resources;

 C. Determine the currently used resources of another link according to the preset correspondence between the sending direction and the receiving direction of the communication link using resources, and make both parties of the communication aware of the resources to be used for the current communication.

 Wherein, the resource is a codeword, or a time slot, or a frequency, or a combination of any two of them.

 The control unit in the communication system is a radio resource controller.

 Wherein, the allocation determining resource is a number for identifying the resource.

 Wherein, the method further includes: presetting a correspondence relationship between the resources used by the communication link in the sending direction and the receiving direction, and storing the correspondence between the communication parties.

 Wherein: 'Step B is that the control unit allocates the currently used resources of any one communication link to the two communicating parties through the same signaling according to the current system resource usage situation;

 Step C is that the two communication parties determine the currently used resources of the other link corresponding to the allocated link according to the corresponding relationship between the transmission direction and reception direction communication link use resources that are stored in advance.

 among them:

 Step B is that the control unit allocates a current communication resource of any one communication link to one of the two communication parties through a signal according to the current use of system resources;

Step C: The communication party communicates according to the sending direction and receiving direction stored in advance by itself. The corresponding relationship between the link resources determines the currently used resources of another link corresponding to the allocated link, and the communicating party then notifies the other communicating party of the determined sending direction and receiving direction of the currently used resources of the communication link. .

 Wherein, the method further includes: after the control unit in the communication system sets the corresponding relationship, the control unit transmits the corresponding relationship to both communication parties through a notification message.

 Wherein, the method further includes: when the control unit in the system adjusts the correspondence between the transmission direction and the reception direction communication link use resources, the control unit adjusts the adjusted relationship between the transmission direction and the reception direction communication link use resources. The correspondence relationship is notified to both communication parties.

 Wherein, the method further includes: presetting and storing in a control unit a correspondence relationship between the sending direction and the receiving direction communication resource used by the communication link.

 among them:

 Step B is that the control unit allocates the currently used resources for any one communication link according to the current situation of the use of system resources;

 Step C is that the control unit determines the currently used resource of another link corresponding to the allocated link according to the correspondence relationship between the transmission direction and the reception direction communication link usage resources that are stored in advance; the control unit then sends the determined transmission The current usage resources of the communication link in the direction and the receiving direction are notified to both communication parties through the same signaling.

 Wherein, in step B, when more than one unit resource is required for the communication link in the sending direction and the receiving direction, the method includes: the control unit in the system groups more than one unit resource into the sending direction and The receiver assigns the group number of a resource group to one of the communication links.

It can be seen that the present invention allocates the currently used resources for one of the communication links in the sending direction and the receiving direction through one signaling, and then determines the current of another link according to the correspondence between the resources used in the sending direction and the receiving direction communication link. Use resources. After both communication parties have learned the use resources of the two communication links, they can perform interactive communication. This method uses only one instruction i.e. The resources used by the communication link in the sending and receiving directions can be determined, reducing the consumption of signaling resources, and making the resource allocation process relatively simple, ensuring the stability of the system. Brief description of the drawings

 FIG. 1 is a schematic diagram of an FDMA access method in the prior art.

 FIG. 2 is a schematic diagram of a TDMA access method in the prior art.

 FIG. 3 is a schematic diagram of a CDMA access method in the prior art.

 FIG. 4 is a flowchart of frequency resource allocation according to the present invention.

 FIG. 5 is a flowchart of implementing spreading codes and frequency resource allocation according to the present invention. Mode of Carrying Out the Invention

 The present invention is described in detail below with reference to the drawings.

 In the present invention, the control unit of the communication system uses one signaling to allocate the currently used resources for one of the communication links in the transmitting direction and the receiving direction, and then determines another chain according to the correspondence between the resources used in the transmitting direction and the receiving direction communication link. The current used resources of the communication channel, after both parties of communication know the current used resources of the two communication links, use the used resources for interactive communication.

 The following describes the present invention in detail through several specific embodiments. The following embodiments are for interactive communication, that is, in the following embodiments, the communicating party must complete both the sending function and the receiving function. The communication is completed by means of a transmission direction link and a reception direction link. In the following embodiments, resource allocation and determination are implemented by obtaining corresponding resource identification numbers.

 Embodiment 1: In a system using a frequency as an information bearing resource, data communication between a user and a base station is taken as an example.

In this system, the radio resource controller is responsible for allocating the available information between the user and the base station. The information resource bearing resource is the control unit of the system. In this embodiment, the information bearing resource is the frequency. The link sent by the user to the base station is the uplink, and the link received by the user from the base station is the downlink. Referring to FIG. 4, the following steps are required to complete the present invention:

 Step 401: When a user needs to communicate with a base station, the user terminal sends a service request message to the base station; after receiving the request message, the base station notifies the radio resource controller through the message, assuming that the current transmission service type in this embodiment is a voice service. Then, the radio resource controller determines that the service to be currently transmitted needs to use uplink and downlink to complete the communication according to the service type in the notification message. Therefore, the radio resource controller determines that uplink and downlink bearer resource allocations need to be performed separately. That is, the frequency is allocated.

 Step 402: The radio resource controller allocates an uplink or downlink usable frequency number to the user terminal and the base station through two message signalings according to the current system frequency resource usage. In this embodiment, the radio terminal is allocated to the user terminal and the base station. The base station's downlink frequency number is 1.

 Step 403: The user terminal and the base station respectively obtain the uplink frequency number 1 according to the corresponding relationship between the uplink frequency number and the downlink frequency number preset on the user terminal, where the corresponding relationship in the embodiment of the present invention is the uplink frequency number. It is equal to the downstream frequency number.

 The correspondence relationship is preset and stored in the base station and the user terminal at the same time. The relationship between the preset uplink frequency and the downlink frequency may also be a correspondence relationship with other mathematical equations, such as the uplink frequency number and the downlink The difference between the frequency numbers is 1, or the difference between the uplink and downlink frequency numbers is a constant; this correspondence can be notified to the base station and the user terminal through the radio resource controller.

 Step 404: After both communication parties have obtained the frequency number used for communication, they can use the allocated frequency for information exchange to complete the communication.

In this embodiment, when the radio resource controller adjusts the uplink frequency or the downlink frequency to cause a frequency change, the radio resource controller notifies the base station and the user terminal of the frequency change. In this embodiment, when the radio resource controller adjusts the correspondence between the uplink frequency and the downlink frequency, the radio resource controller notifies the user terminal and the base station of the changed correspondence.

 When the base station initiates a communication request to the user, the frequency allocation process is similar to the above process. Embodiment 2: In a TDMA system, communication between a user and a base station is taken as an example. When the present invention is applied to a TDMA system, the radio resource controller is still used to allocate communication resources to the communicating parties, the allocated resources are time periods, and time slots are used as resource allocation units. The process by which the radio resource controller allocates time slots to users and base stations is the same as the above-mentioned process of assigning frequencies. The only difference is that the object allocated by the radio resource controller is changed to a time slot. In the case of changing the relationship between the time slot numbers, the rest of the process is exactly the same as the frequency allocation process.

 Embodiment 3: In a CDMA system, communication between a user and a base station is taken as an example. When the present invention is applied to a CDMA system, the radio resource controller is still used to allocate communication resources to the communicating parties, the allocated resources are code words, and the spreading code is used as a resource allocation unit. The process of the radio resource controller assigning the spreading code to the user and the base station is the same as the process of assigning the frequency described above, except that the object allocated by the radio resource controller is changed to the spreading code. The correspondence between the frequency numbers is here. In this case, the relationship between the spreading code numbers is changed, and the rest of the process is exactly the same as the frequency allocation process.

 Embodiment 4: In a communication system capable of using a frequency and a spreading code at the same time, communication between a user and a base station is taken as an example.

 As shown in FIG. 5, when the present invention is applied to a communication system capable of using both frequency and spreading codes, the radio resource controller is still used to allocate communication resources to both parties of communication, and the allocated resources are frequency and codeword, and the frequency and The spreading code is used as a resource allocation unit. Then, the following steps are required to complete this embodiment:

Step 501: When the user needs to communicate with the base station, the user terminal sends the service to the base station. Service request message; after receiving the request message, the base station notifies the radio resource controller through a notification message. Assuming that the current transmission service type in this embodiment is a voice service, the radio resource controller obtains the current value based on the service type in the notification message. The services to be transmitted need to use the uplink and downlink to complete the communication, so the radio resource controller determines that the uplink and downlink bearer resource allocations need to be performed separately;

 Step 502: The radio resource controller allocates an uplink or downlink usable spreading code number to the user terminal and the base station through a message signaling according to the use of the spreading code resources of the current system. In this embodiment, the uplink uses a frequency. Resources, the downlink uses a spreading code resource, and first allocates a spreading code number to the downlink of the user terminal and the base station as 1;

 Step 503: The user terminal and the base station respectively obtain the uplink frequency number according to the corresponding relationship between the preset frequency number and the spreading code number. In this embodiment, the preset frequency number and the spreading code number are preset. The corresponding relationship between the uplink frequency number and the downlink spreading code number is equal; wherein the corresponding relationship is preset and stored in the base station and the user terminal at the same time, and the preset spreading code number and the frequency number are The relationship may also be a correspondence relationship of other mathematical equations, for example, the difference between the uplink spreading code number and the downlink frequency number is 1 or the difference between the spreading code number and the frequency number is a constant; this kind of correspondence relationship can be wirelessly The resource controller notifies the base station and the user terminal;

 Step 504: Both communicating parties obtain the frequency number and the spreading code number used for communication, and the spreading code and frequency can be used for information exchange to complete the communication.

 In step 502, the uplink may use spreading code resources, and the downlink may use frequency resources, and a relationship between the uplink spreading code number and the downlink frequency number may be set in advance. In addition, the radio resource controller may allocate downlink resources, and then determine uplink resources according to the corresponding relationship; it may also allocate uplink resources, and then determine downlink resources according to the corresponding relationship.

In this embodiment, when the radio resource controller adjusts uplink or downlink allocation resources, When the use resource is changed, the radio resource controller notifies the base station or the user terminal of the change of the allocated resource.

 In this embodiment, when the radio resource controller adjusts the corresponding relationship between the uplink and downlink resources, the radio resource controller notifies the user terminal and the base station of the changed correspondence relationship.

 For the case where the base station initiates a communication request to the user, the process is similar to the above process. For a system using any combination of a frequency, a spreading code, and a time slot as a signaling bearer resource, the resource allocation process is consistent with the allocation process of the fourth embodiment.

 The present invention can also be applied to other communication systems, and its allocated resources can be different types according to different communication systems. When each resource is used independently, its allocation method is consistent with the process described in Embodiment 1. When two resources are used in combination, its allocation method is consistent with the allocation process described in Embodiment 4.

 In the present invention, when each of the uplink and downlink needs to allocate multiple unit resources according to the service type, for example, a set of spreading codes is required, and several time slots are required at the same time. Multiple unit resources form a group, and the corresponding relationship between the uplink and downlink resource groups is set in advance, and the resource group number is allocated to the uplink or the downlink during allocation.

 In the present invention, the process of allocating uplink and downlink resources to both communication parties may also be performed in the following manner: The control unit allocates corresponding resources that can be used by the uplink or downlink to the terminal of the communication party through a message signaling, and then the communication One party obtains the resource of the other link corresponding to the link of the allocated resource according to the corresponding relationship between the preset uplink resource and the corresponding downlink resource, and the communication party will obtain the obtained uplink and downlink. Of the resource is notified to the other party through the message.

The present invention can also save the correspondence relationship between the uplink and the downlink in the control unit. The control unit first determines the uplink or downlink use resource of the communicating party in itself, and then determines another chain according to the correspondence relationship stored in itself. Way to use resources, the control unit will determine The uplink and downlink resources are notified to the communicating party by a signaling, and the communicating parties then communicate after obtaining the uplink and downlink resources through interaction.

 It can be seen that the present invention uses a single signaling to allocate the currently used resources for one of the communication links in the sending direction and the receiving direction, and determines the current of another link according to the correspondence between the resources used in the sending direction and the receiving direction communication link. Use resources. After both parties of the communication are informed of the currently used resources, they can communicate using the determined resources. In this method, only a single instruction is used to complete the designation of the communication link in the sending direction and the receiving direction, which saves signaling resources, and makes the resource allocation process relatively cylindrical, thereby ensuring the stability of the system.

Claims

Claim 1. A resource allocation method in a communication system. A control unit in the system allocates resources for communication to two communicating parties through signaling. When the communication is a non-interactive type, two unrelated signalings are used for each The communication link of the communicating party allocates resources. When the communication is an interaction type, the method is characterized in that the method includes the following steps:  A. After one of the two communication parties sends a communication request to the other party, the control unit in the current communication system is notified to perform resource allocation;  B. The control unit described in step A allocates the current use resource for a link in the sending direction and the receiving direction of the communication link of the communicating party through a signaling according to the current use of system resources;  C. Determine the currently used resources of another link according to the preset correspondence between the sending direction and the receiving direction of the communication link using resources, and make both parties of the communication aware of the resources to be used for the current communication.  2. The method according to claim 1, wherein the resource is a codeword, a time slot, a frequency, or a combination of any two of them.  The method according to claim 1, characterized in that: the control unit in the communication system is a radio resource controller.  4. The method according to claim 1 or 2, characterized in that: the allocation determining resource is to obtain a number identifying the resource.  5. The method according to claim 1 or 2, characterized in that the method further comprises: presetting a correspondence relationship between the transmission direction and the reception direction communication link use resources, and storing the correspondence relationship between the communication parties.  6. The method according to claim 5, characterized in that: Step B is that the control unit passes the same The signaling respectively allocates the currently used resources of any one communication link for both communication parties; the correspondence between the used resources of the letter link determines the currently used resources of another link corresponding to the allocated link.  • 7. The method according to claim 5, characterized in that:  Step B is that the control unit allocates a current communication resource of any one communication link to one of the two communication parties through a signal according to the current use of system resources;  Step C is that the correspondent party determines the currently used resource of another link corresponding to the allocated link according to the correspondence relationship between the sender direction and receive direction communication link resources stored in advance, and the correspondent party will determine the The transmitting party and the receiving party are notified of the currently used resources of the communication link to the other party.  8. The method according to claim 5, further comprising: after the control unit in the communication system sets the correspondence relationship, the control unit transmits the correspondence relationship to both communication parties through a notification message.  9. The method according to claim 5, further comprising: when the control unit in the system adjusts a correspondence relationship between a transmission direction and a reception direction communication link use resource, the control unit transmits the adjusted transmission The correspondence between the communication resources used by the direction and the receiving direction is notified to both communication parties.  10. The method according to claim 1 or 2, characterized in that the method further comprises: presetting and storing a correspondence relationship between the sending direction and the receiving direction communication link use resource in a control unit.  11. The method according to claim 10, wherein:  Step B: the control unit allocates the currently used resources for any communication link according to the current use of system resources; Step C is for the control unit to make the communication link based on the transmission direction and the reception direction stored in advance. Use the correspondence between resources to determine the currently used resources of another link corresponding to the allocated link; the control unit then uses the same signaling to determine the currently used resources of the communication link in the sending and receiving directions respectively. Notify both parties in communication.  12. The method according to claim 1 or 2, characterized in that in step B, when both the transmission direction and the reception direction need more than one unit resource, the method includes: a control unit in the system sets one The above unit resources are grouped, and a group number of a resource group is allocated to one of the communication links in the transmitting direction and the receiving direction of the communicating party.