EP3141066A1 - Procédé de réduction de l'impact du brouillage d2d dans la bande sur une transmission cellulaire - Google Patents

Procédé de réduction de l'impact du brouillage d2d dans la bande sur une transmission cellulaire

Info

Publication number
EP3141066A1
EP3141066A1 EP15766229.7A EP15766229A EP3141066A1 EP 3141066 A1 EP3141066 A1 EP 3141066A1 EP 15766229 A EP15766229 A EP 15766229A EP 3141066 A1 EP3141066 A1 EP 3141066A1
Authority
EP
European Patent Office
Prior art keywords
zone
resource
user equipment
base station
cell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP15766229.7A
Other languages
German (de)
English (en)
Inventor
Dong Li
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcatel Lucent SAS
Original Assignee
Alcatel Lucent SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alcatel Lucent SAS filed Critical Alcatel Lucent SAS
Publication of EP3141066A1 publication Critical patent/EP3141066A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/121—Wireless traffic scheduling for groups of terminals or users
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup

Definitions

  • the present invention relates to the technology field of wireless communication, and particularly to a method of reducing impact of D2D in-band interference on cellular transmission in base station or user equipment. Background of the invention
  • the D2D signals occupy part of uplink cellular resources (i.e., uplink carriers for FDD and uplink subframes for TDD), as shown in Figure 2 for the case of FDD.
  • the D2D signals will occupy some periodical uplink subframes.
  • the uplink cellular control signals i.e., PUCCH
  • the cellular PUCCH signals have to be multiplexed with D2D signals through FDM, as shown in Figure 2.
  • the uplink PUCCH signals (e.g., ACK/NACK, CQI feedback etc. depending on the PUCCH format) play an important role in supporting the downlink data transmission, the in-band emission interference from D2D signals to the cellular control signals has to be solved.
  • This invention aims to address this technical problem.
  • the solution in the above mentioned patent works well in controlling the in-band emission interference to uplink cellular signals.
  • it has some disadvantages.
  • the main disadvantage is that by using power control, the D2D signal transmission powers are not uniform for different D2D users (the closer to base station, the lower the D2D signal transmission power is), thus the D2D transmission range is not uniform. This is not a desirable property for D2D transmissions. Summary of the invention
  • the present invention proposes a method, implemented in a base station of a wireless communication system, of reducing impact of D2D in-band interference on cellular transmission, the method comprises:
  • the base station configuring the D2D resource pool as a resource pool including a first zone and a second zone, wherein the first zone is a restricted D2D resource zone and the second zone is an unrestricted D2D resource zone.
  • the inventor of the present invention utilizes the base station to divide the D2D resource pool into a resource pool including a first zone and a second zone, wherein the first zone is a restricted D2D resource zone and the second zone is an unrestricted D2D resource zone.
  • a configuration could divide the D2D resource pool to be configured differently for different user equipments or make the user equipments to autonomously select different resources, so as to reduce impact of D2D in-band interference on cellular transmission effectively.
  • the number of resource blocks in the first zone is smaller than the number of resource blocks in the second zone, or the number of subframes in the first zone is smaller than the number of subframes in the second zone.
  • the size of the first zone and the second zone can be configured to satisfy the requirement of different application scenarios, so as to reduce impact of D2D in-band interference on cellular transmission while the normal communication requirement is not influenced at the same time.
  • the method further comprises:
  • the first group being configured to be only able to use the resources in the restricted D2D resource zone in the first zone for D2D communication while the second group being configured to be able to use the resources in the unrestricted D2D resource zone in the second zone for D2D communication or to use the resources in the first zone and in the second zone for D2D communication.
  • the user equipments are divided into different groups by the base station.
  • the embodiment is illustrative but not limitative.
  • the grouping manner could also be achieved in the way that the user equipments decide by themselves that to which group they belong and in order to control more accurately, the user equipments could be divided into more than two groups. After such a grouping it is optimized that different resource zones are used by different groups such that the impact of D2D in-band interference on cellular transmission is reduced.
  • the second group is configured to be only able to use the unrestricted D2D resource zone in the second zone for D2D communication. In such a manner, the second group is configured to be able to use the resource in the unrestricted D2D resource zone in the second zone for D2D communication and thus the receipt of the PUCCH in the corresponding base station is minimally influenced by the D2D user equipment in the second group.
  • the predetermined rule includes:
  • the base station dividing the user equipments connected therewith into at least two groups based on the strength of the signal sent from a user equipment connected therewith to the base station;
  • the base station dividing the user equipments connected therewith into at least two groups based on the interference degree of the base station caused by the user equipments connected therewith.
  • the first group is the user equipments set in which the strength of signal received from the base station exceeds a first threshold and the second group is the user equipments set in which the strength of signal received from the base station does not exceed a first threshold.
  • the corresponding user equipments could be advantageously and fast divided into groups.
  • a second aspect of the present invention provides a method, implemented in a user equipment of a wireless communication system, of reducing impact of D2D in-band interference on cellular transmission, the method comprising:
  • the user equipment determining first location status information associated with the user equipment based on the signal quality of a signal received from the base station communicated therewith;
  • the user equipment could determine first location status information associated with the user equipment based on the signal quality of a signal received from the base station communicated therewith, and then the user equipment could select corresponding D2D resource based on the first location status information. In such a manner, the user equipment could select the D2D resource based on the first location status information orderly rather than that the D2D resource is not controlled to be chosen and only selected unorderly in the prior art.
  • the user equipment further receives configuration information of the resource pool from the base station, and wherein the configuration information of the resource pool includes resource configuration information indicating the first zone and the second zone, and the first zone is a restricted D2D resource zone and the second zone is an unrestricted D2D resource zone.
  • the user equipment could be informed how the D2D resource pool is allocated by the corresponding base station and the user equipment according to the present invention could select the D2D resource based on the allocation manner so as to reduce impact of D2D in-band interference on cellular transmission.
  • the first location status information includes location status indication information which at least includes a first status and a second status, and wherein the first status indicates that the user equipment locates at the center of a cell and the second status indicates that the user equipment locates at the edge of a cell.
  • location status indication information which at least includes a first status and a second status
  • the first status indicates that the user equipment locates at the center of a cell
  • the second status indicates that the user equipment locates at the edge of a cell.
  • the transmitting power of the user equipment located at the center of a cell is the same as that of the user equipment located at the edge of a cell, or the transmitting power of the user equipment located at the center of a cell is smaller than that of the user equipment located at the edge of a cell.
  • the transmitting power of a user equipment located at the center of a cell and the transmitting power of a user equipment located at the edge of a cell could be the same or different.
  • the same transmitting power could make sure that the D2D user equipments have substantially the same discovery range when neighbor discovery is performing and thus it is beneficial for neighbor discovery.
  • the transmitting power of a user equipment located at the center of a cell and the transmitting power of a user equipment located at the edge of a cell could also be different, for example, the transmitting power of a user equipment located at the center of a cell is smaller than the transmitting power of a user equipment located at the edge of a cell. In such a manner, the impact of D2D in-band interference on cellular transmission could be further reduced.
  • the user equipment is configured to be only able to use the resources in the restricted D2D resource zone in the first zone for D2D communication when the user equipment locates at the center of the cell, while the user equipment is configured to be able to use the resources in the unrestricted D2D resource zone in the second zone for D2D communication or to use the resources in the first zone and in the second zone for D2D communication when the user equipment locates at the edge of the cell.
  • the user equipments could decide by themselves that to which group they belong and such a grouping manner is only illustrative but not limitative. Those skilled in the art should understand that in order to control more accurately the user equipments could be divided into more than two groups. After such a grouping it is optimized that different resource zones are used by different groups such that the impact of D2D in-band interference on cellular transmission is reduced.
  • the user equipment is configured to be only able to use the unrestricted D2D resource zone in the second zone for D2D communication when the user equipment locates at the edge of the cell.
  • the second group is configured to be able to use the resource in the unrestricted D2D resource zone in the second zone for D2D communication and thus the receipt of the PUCCH in the corresponding base station is minimally influenced by the D2D user equipment in the second group.
  • the user equipment when the user equipment locates at the edge of the cell and the user equipment is configured to be able to use the resource in the restricted D2D resource zone and the resource in the unrestricted D2D resource zone in the first zone and in the second zone for D2D communication, the user equipment selects the resource in the restricted D2D resource zone in the first zone for D2D communication with a first probability and selects the resource in the unrestricted D2D resource zone in the second zone for D2D communication with a second probability.
  • the first probability is smaller than the second probability.
  • the first probability is associated with the number of resources in the first zone and the second probability is associated with the number of resources in the second zone.
  • the inventor of the present invention utilizes the base station to divide the D2D resource pool into a resource pool including a first zone and a second zone, wherein the first zone is a restricted D2D resource zone and the second zone is an unrestricted D2D resource zone.
  • a configuration could divide the D2D resource pool to configure differently for different user equipments or make the user equipment to autonomously select different resources, so as to reduce impact of D2D in-band interference on cellular transmission effectively.
  • Fig. l illustrates a schematic diagram 100 of interference generated due to signal power leakage in the prior art
  • Fig.2 illustrates a schematic diagram 200 of D2D resource pool configuration in the prior art
  • Fig.3 illustrates a schematic diagram 300 of D2D resource pool configuration according to the present invention
  • Fig.4 illustrates a schematic diagram 400 of a particular embodiment of the D2D resource pool configuration in the present invention
  • Fig.5 illustrates a flow chart 500 of a method, implemented in a base station of a wireless communication system, of reducing impact of D2D in-band interference on cellular transmission;
  • Fig.6 illustrates a flow chart 600 of a method, implemented in a user equipment of a wireless communication system, of reducing impact of D2D in-band interference on cellular transmission.
  • Fig. l illustrates a schematic diagram 100 of interference generated due to signal power leakage in the prior art.
  • Fig. l illustrates a schematic diagram 100 of interference generated due to signal power leakage in the prior art.
  • Fig. l while the useful signal 1 is transmitted, carrier leakage will occur as denoted by the numeral 2 and thus other cellular communication is influenced.
  • Fig.2 illustrates a schematic diagram 200 of D2D resource pool configuration in the prior art.
  • the PUCCH of the cellular network must be transmitted on the uplink grant, and thus the PUCCH of the cellular network and the D2D uplink frame must be frequency multiplexed transmitted. Due to the existence of the carrier leakage as shown in Fig. l , such a configuration must cause that the interference to the receipt of the PUCCH must be uncontrollable.
  • This invention proposes a scheme to address the in-band interference of D2D signal to cellular signals to a large extent.
  • the basic ideas of the invention are as follows.
  • the eNB will suffer from severe in-band interference in decoding the uplink signals (e.g., PUCCH), as mentioned above. If we further consider more details of the in-band interference from D2D signals to PUCCH receiving, we can know that the major interferers of such interference are those D2D UEs that are near eNB.
  • a special region in time
  • the cell center D2D users can only occupy the discovery resource within the special region
  • the other D2D users can occupy any resource of the configured resource pool, or alternatively, the other D2D users preferably occupy the discovery resource outside the special region to reduce collisions with the cell center D2D UEs.
  • the special resource region is named as a restricted D2D resource zone.
  • Fig.3 illustrates a schematic diagram 200 of D2D resource pool configuration according to the present invention.
  • the inventor of the present invention utilizes the base station to divide the D2D resource pool into a resource pool including a first zone and a second zone, wherein the first zone is a restricted D2D resource zone and the second zone is an unrestricted D2D resource zone.
  • a configuration could divide the D2D resource pool to configure differently for different user equipments or make the user equipment to autonomously select different resources, so as to reduce impact of D2D in-band interference on cellular transmission effectively.
  • Fig.3 is only illustrative and the size of each zone is not configured.
  • Fig.4 illustrates a schematic diagram 400 of a particular embodiment of the D2D resource pool configuration in the present invention. Assume that the D2D resource pool is configured, by the base station, as a periodic successive uplink subframe and it has the following size, namely 44 PRB in frequency domain and 32 subframes in time domain, as shown in Fig.4. Those skilled in the art should understand that these parameters are only illustrative but not limitative.
  • the present invention proposes to configure a restricted zone in the D2D resource pool. The size of this restricted zone should be very limited as shown in Fig. 4.
  • Fig.5 and Fig.6 illustrate flow charts 500, 600 of a method, implemented in a base station or a user equipment of a wireless communication system, of reducing impact of D2D in-band interference on cellular transmission.
  • Fig.5 illustrates a flow chart 500 of a method, implemented in a base station of a wireless communication system, of reducing impact of D2D in-band interference on cellular transmission.
  • the method comprises at least the following steps: in the method step 510, the base station configures the D2D resource pool as a resource pool including a first zone and a second zone, wherein the first zone is a restricted D2D resource zone and the second zone is an unrestricted D2D resource zone.
  • the number of resource blocks in the first zone is smaller than that in the second zone, or the number of subframes in the first zone is smaller than that in the second zone.
  • the size of the first zone and the second zone can be configured to satisfy the requirement of different application scenarios, so as to reduce impact of D2D in-band interference on cellular transmission while the normal communication requirement is not influenced at the same time.
  • the method further comprises:
  • the first group being configured to be only able to use the resources in the restricted D2D resource zone in the first zone for D2D communication while the second group being configured to be able to use the resources in the unrestricted D2D resource zone in the second zone for D2D communication or to use the resources in the first zone and in the second zone for D2D communication.
  • the user equipments are divided into different groups by the base station.
  • the embodiment is illustrative but not limitative.
  • the grouping manner could also be achieved in the way that the user equipments decide by themselves that to which group they belong and in order to control more accurately the user equipments could be divided into more than two groups.
  • After such a grouping it is optimized that different resource zones are used by different groups such that the impact of D2D in-band interference on cellular transmission is reduced.
  • the second group is configured to be only able to use the unrestricted D2D resource zone in the second zone for D2D communication.
  • the second group is configured to be able to use the resource in the unrestricted D2D resource zone in the second zone for D2D communication and thus the receipt of the PUCCH in the corresponding base station is minimally influenced by the D2D user equipment in the second group.
  • the predetermined rule includes:
  • the base station dividing the user equipments connected therewith into at least two groups based on the strength of the signal sent from a user equipment connected therewith to the base station;
  • the base station dividing the user equipments connected therewith into at least two groups based on the interference degree of the base station caused by the user equipments connected therewith.
  • the first group is the user equipments set in which the strength of signal received from the base station exceeds a first threshold and the second group is the user equipments set in which the strength of signal received from the base station does not exceed a first threshold.
  • Fig.6 illustrates a flow chart 600 of a method, implemented in a user equipment of a wireless communication system, of reducing impact of D2D in-band interference on cellular transmission.
  • the method according to the present invention comprises at least the following two steps, namely in the method step 610, the user equipment determines first location status information associated with the user equipment based on the signal quality of a signal received from the base station communicated therewith; and then in the method step 620, the user equipment performing corresponding D2D resource selection based on the first location status information.
  • the user equipment could determine first location status information associated with the user equipment based on the signal quality of a signal received from the base station communicated therewith, and then the user equipment could select corresponding D2D resource based on the first location status information. In such a manner, the user equipment could select the D2D resource based on the first location status information orderly rather than that the D2D resource is not controlled to be chosen and only selected unorderly.
  • the user equipment further receives configuration information of the resource pool from the base station, and wherein the configuration information of the resource pool includes resource configuration information indicating the first zone and the second zone, and the first zone is a restricted D2D resource zone and the second zone is an unrestricted D2D resource zone.
  • the user equipment could be informed how the D2D resource pool is allocated by the corresponding base station and the user equipment according to the present invention could select the D2D resource based on the allocation manner so as to reduce impact of D2D in-band interference on cellular transmission.
  • the first location status information includes location status indication information which at least includes a first status and a second status, and wherein the first status indicates that the user equipment locates at the center of a cell and the second status indicates that the user equipment locates at the edge of a cell.
  • location status indication information which at least includes a first status and a second status
  • the first status indicates that the user equipment locates at the center of a cell
  • the second status indicates that the user equipment locates at the edge of a cell.
  • the transmitting power of the user equipment located at the center of a cell is the same as that of the user equipment located at the edge of a cell, or the transmitting power of the user equipment located at the center of a cell is smaller than that of the user equipment located at the edge of a cell.
  • the transmitting power of a user equipment located at the center of a cell and the transmitting power of a user equipment located at the edge of a cell could be the same or different.
  • the same transmitting power could make sure that the D2D user equipments have substantially the same discovery range when neighbor discovery is performing and thus it is beneficial for neighbor discovery.
  • the transmitting power of a user equipment located at the center of a cell and the transmitting power of a user equipment located at the edge of a cell could also be different, for example, the transmitting power of a user equipment located at the center of a cell is smaller than the transmitting power of a user equipment located at the edge of a cell. In such a manner, the impact of D2D in-band interference on cellular transmission could be further reduced.
  • the user equipment is configured to be only able to use the resources in the restricted D2D resource zone in the first zone for D2D communication when the user equipment locates at the center of the cell, while the user equipment is configured to be able to use the resources in the unrestricted D2D resource zone in the second zone for D2D communication or to use the resources in the first zone and in the second zone for D2D communication when the user equipment locates at the edge of the cell.
  • the user equipments could decide by themselves that to which group they belong and such a grouping manner is only illustrative but not limitative. Those skilled in the art should understand that in order to control more accurately the user equipments could be divided into more than two groups. After such a grouping it is optimized that different resource zones are used by different groups such that the impact of D2D in-band interference on cellular transmission is reduced.
  • the user equipment is configured to be only able to use the unrestricted D2D resource zone in the second zone for D2D communication when the user equipment locates at the edge of the cell.
  • the second group is configured to be able to use the resource in the unrestricted D2D resource zone in the second zone for D2D communication and thus the receipt of the PUCCH in the corresponding base station is minimally influenced by the D2D user equipment in the second group.
  • the user equipment when the user equipment locates at the edge of the cell and the user equipment is configured to be able to use the resource in the restricted D2D resource zone and the resource in the unrestricted D2D resource zone in the first zone and in the second zone for D2D communication, the user equipment selects the resource in the restricted D2D resource zone in the first zone for D2D communication with a first probability and selects the resource in the unrestricted D2D resource zone in the second zone for D2D communication with a second probability.
  • the first probability is smaller than the second probability.
  • the first probability is associated with the number of resources in the first zone and the second probability is associated with the number of resources in the second zone.
  • the inventor of the present invention utilizes the base station to divide the D2D resource pool into a resource pool including a first zone and a second zone, wherein the first zone is a restricted D2D resource zone and the second zone is an unrestricted D2D resource zone.
  • a configuration could divide the D2D resource pool to configure differently for different user equipments or make the user equipment to autonomously select different resources, so as to reduce impact of D2D in-band interference on cellular transmission effectively.

Abstract

L'invention concerne un procédé, mis en œuvre dans une station de base d'un système de communication sans fil, qui permet de réduire l'impact du brouillage D2D dans la bande sur une transmission cellulaire. Selon ce procédé, la station de base configure le groupe de ressources D2D pour en faire un groupe de ressources qui comporte une première et une seconde zone, la première zone étant une zone de ressources D2D réservée et la seconde zone étant une zone de ressources D2D non réservée. En outre, la présente invention se rapporte à un procédé, mis en œuvre dans un équipement utilisateur d'un système de communication sans fil, qui permet de réduire l'impact du brouillage D2D dans la bande sur une transmission cellulaire. Selon ce procédé : l'équipement utilisateur détermine des informations d'état d'un premier emplacement qui lui sont associées, en se basant sur la qualité de signal d'un signal reçu en provenance de la station de base avec laquelle il communique ; et l'équipement utilisateur réalise une sélection de ressource D2D correspondante en se basant sur les informations d'état du premier emplacement. Le procédé selon cette invention peut réduire efficacement l'impact du brouillage D2D dans la bande sur une transmission cellulaire grâce à la division du groupe de ressources D2D en une première et une seconde zone, et grâce à la répartition de l'équipement utilisateur dans plusieurs ensembles.
EP15766229.7A 2014-05-08 2015-05-07 Procédé de réduction de l'impact du brouillage d2d dans la bande sur une transmission cellulaire Withdrawn EP3141066A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201410192499.0A CN105101250B (zh) 2014-05-08 2014-05-08 一种用于降低d2d带内干扰对蜂窝传输的影响的方法
PCT/IB2015/000846 WO2015173632A1 (fr) 2014-05-08 2015-05-07 Procédé de réduction de l'impact du brouillage d2d dans la bande sur une transmission cellulaire

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EP3141066A1 true EP3141066A1 (fr) 2017-03-15

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EP (1) EP3141066A1 (fr)
KR (1) KR101914199B1 (fr)
CN (1) CN105101250B (fr)
TW (1) TWI594640B (fr)
WO (1) WO2015173632A1 (fr)

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CN105101250A (zh) 2015-11-25
CN105101250B (zh) 2018-08-14
TW201601556A (zh) 2016-01-01
TWI594640B (zh) 2017-08-01
KR101914199B1 (ko) 2018-11-06
KR20160149282A (ko) 2016-12-27
WO2015173632A1 (fr) 2015-11-19

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